---
title: WWDC2003 Session 720
framework: wwdc
role: article
path: wwdc/wwdc2003-720
---

# WWDC2003 Session 720

## Transcript

Kind: captions Language: en so let's take this clicker and see how it works as you said I'm the CTO pop by technology we are based in Sweden we work with including systems so that's the capacity while I'm here and work a lot with wireless so what are we going to talk about today well the goal is to understand as I said all aspects of wireless content creation and I don't think you will have all aspects of it we will talk briefly about business models how the radio networks is acting a content creation how the content workflow works for an operator carrier etc and also show you tools on how to make this kind of content so how it all started and it's totally baited with SMS small messaging services I know it's coming up now in u.s. you send these text messages to each other as mess was actually created as a diagnostic system for gsm networks but in 98 it started to grow a lot and you have this kind of SMS message and person to person it grew very lot in Europe in Asia after that we got something called enhanced SMS which is basically as an SMS with like a 24 bit graphics with it and in 2008 release it early on and happen in two thousand something called I mode was released by giacomo it was basically like a multimedia SMS and you have graphics you had sound get animation etc and you sent it to each other so that's really when it started to take off then in 2002 the so-called mms was released which stands for multimedia messaging much it's like an SMS but you can have video audio text and emissions etc pretty much close to what I motives and now we're in the face of videos coming in and basically today you have services where you can download video and it works for different kind of networks I'll talk about that later on later on and you'll have streaming mail today it's about live streams like traffic surveillance etc and old also video telephony is coming on the 3g networks the caramel doesn't likely because I move around so I'm going to stand there so a brief look at the business models and if you look at SMS there's a lot of operated SMS services yeah but most as third-party as a message like let's say you weather news that kind of thing and it's based on revenue sharing so the operator gets a piece of the SMS and the SMS supplier also get a piece of it exactly it also works as a big pipe and when I say big pipe I mean that when i send an SMS to one person to another the operator issues used pay for sending sms in this case it doesn't count bits it's a unity price but the nasty messages have X amount of size so that's why its unity price and then we have mms and it's pretty much the same thing you have operator services based on mms your third party mms services revenue sharing annual also have the account of big pipe where i sent an internet from me to another person when we look at video and download and streaming upset the question mark because it's just started and i see a lot of operators carriers doesn't really know what kind of business model they're going to have so we have operators which acts as content creators not that they sit down and recall like a football game but they take content from the TV station and edit it so they make their own content and some of them work with contents of our service suppliers like revenue sharing exactly as you did with SMS and some only works as bit pipes so those basically you have the same kind of business models all the way when we talk about video telefono is time-based with the same as making a call so that's pretty easy so this is the kind of business more I'm not going to get in to much talking about this because I'm taking guy so what kind of networks do we have today we have the 2g networks which is like the exam which having euthanasia loft the cdma tma in North America and you can have 9.6 shell bits per second when we talk about data transferring if you would to do a multimedia service and as you all can understand you can't really do that much it's not like a sender stream video / 9.6 we have the 2.5 generation networks which goes up to 30 little bit kilobits per second today and but the theory is deeper s can go at 171 71 and you have HS CSD odd force which the same English which is up to 66 and you have edged with some argue and say that 3g so it's sort of 2.5 points file or something like that which can come up to 474 but that's in theory the networks today are in practice when it's the we talk / 2.5 g is sergey kilobits per second that's the fact then we are 3g which today only have 64 kilobits per second you can get one on 28 to bits per second services and i will talk more about that later on how that works but in practice is 64 kilobits per second today in theory it will be able to go up to 2 megabits per second both wcdma and cdma2000 so that is the kind of network we are talking about only 12 non-wireless today I'm mainly going to focus on two and a half g and 3d because that's why it can use this video so brief look at what kind of services do you have to our network because that's actually the network is some way a steering what kind of service you can have of course for two years speech and this is true for all it's a three year two and half the speech is one of the major businesses for or services for operators they still wouldn't make much much make much much money most money and the RS masters we talked about before where you do this kind of communication person-to-person entertainment etc and ringtones is very popular at least in Europe I don't actually know how they the US but in Europe is very popular to download the latest song from your favorite artists and handlers at the ringtone on two and a half g you have this mms and which is like an enhance SMS service the pretty much the same kind of source which would have an SMS but they'd added on multimedia to it and you have video download sports news etc and usually going to talk about g4s networks with its 2.5 we talk about streaming it's all about traffic you can have traffic surveillance you can check out of the traffic on that road the 11 or etc yeah it's small clips you can download or stream news sports etc it's the same kind of services all the time but you have more content that you can use or rich your content you can use depending on the on bandwidth for mms it's the same thing for 3g you have mms you have video downloading you have streaming the same channel services and on top of that you have video telephony and the three difference we have an operator called three which actually is up and running and doing these kind of services video download where you can download news sports entertainment you can look at videos from your properties etc so this is really up and running so this is how the services sort of lay down or on the networks so if it's about how radio network acts i'm not going to talk about it the structure of the rainy network like all entries and etc if you have questions about that you can take that in a Q&A but basically a radio network is built out of cells and if you talk about deeper s with some of the language because that's the easiest one if you get time slots so you get a time slot and many people think like okay it's time slot how is that working in a g4s network every call has very very small time slot so let's say you have 100 slots per cell of course you have a look more but this is your second calculated in my head so yeah one thong time's up when you enter the cell is pretty much in theory 12 kilobits per second but you always calculate with 10 because you have a lot of overhead etc so usually I come in typically you get three times lots that's how it starts then you move over to the next slot but in that slot you have a lot of other users you might just get to slopes in that cell and this is one other thing is that different radio networks from internet for instance is that you actually move within you don't you're not connected to the same access point all the time you are handed over to new access points all the time but it could also be much easier if you can be in the cell and X amount of paper comes into yourself and then once again you might just get two time slots so 3g well it's the same kind of thinking but we talked about megabits per second instead this is same channel think you have X amount of be straight in a Cell so this is pretty much how the radio network act so let's talk about delivery or distribution if you look at streaming for g4s as we said before one point loss is twelve kilobits per second but we calculated ten usually so we talk about very very low bit rates like it 20 to 30 kilobits per second and which in essence two to three times lots but one of the most important thing about a gps network or action and edge network as well is that the operators can prioritize the services and I haven't met an operator carrier so for the doesn't prioritize speech if there any operators here who do this do the opposite they can raise their hands but I don't believe that so that means that if their X amount of people in the cell and they want to use ordinary speech the people who appointed the GPRS flops the time slots they would prioritize that down so you will get like one time slot a tube or something like that and it's also like this that they can prioritize in a way that says when you come in to sell you have three times lots but after 30 seconds one minute they get down to time two times less because they want to give more times of in the beginning when the user comes in through cell because you usually do something like 10 20 30 seconds to begin with then you want to have build access then of course you have network congestion you have a lot of packet loss why wireless networks radiant effort is like a no reliable internet you can have half packets coming through radio network which doesn't exist on that loan on internet for instance and the other thing is latency when you do streaming you have the rtcp keep alive and the course of the latency you might not get that keep a line back to the stream server so depending on how often that the stream server expects to get this or TCP call that it will shut down off the one so that's why it's important to do short clips when it will not scream you need to rest because if you do 30 second clip nothing is going to happen because the probe usually takes about a minute before the strings are xx suggestive of the CP right if we talk about 3g streaming well it's a bit of difference they have something called PDP context and you can have different kind of PDP context the idea is that when you do surfing you get the PDP context called best effort that's like internet you get 64 kilobits but it's best effort it depends on how many share available bandwidth in that cell at this point this is how all three networks acts in the next release of 3g you will have something called a dedicated PDP context of streaming context which means when you do the surfing and you access an rtsp stream you will set up a new PDP context which is a dedicated 64k bit ah that is this fork a bit PDP context so that means you need have 64 kilobits for sure all the way but that's not really area and then you have the same thing as from g4s network and after congestion packet loss it's much better than or equals net work and still most of the 3g networks are circuit switched and not fully like a packet packet based network so it's affected bearer which runs on the circuit switched environment quitting the radio network and the circuits which is basically like point-to-point legs that's that's what you do with the ad on the internet you know point-to-point connections so that's what circus wishes and then you have X amount of book the next wins in the infrastructure which you have to do considers well is that for instance on internet you have companies like Akamai and levels can conference replace relay cash service out in the network that doesn't exist on radio networks up to date that's also something that is coming in the next releases so today you have both the next week's you can think of it as routers as well we should have to take in consideration it's not pretty aroused disease it's oren cease trading network controllers etc the most important however is the firewall i don't know how many people had asking me about firewalls because the problem is that usually operates and carries doesn't open UDP excess and firewalls so you can stream and everyone's trying to stream and users can do it in Europe they started opening opening it up and I know then the Asia they have it a lot is open up there but it also depends on a business model to the operator allow for third-party services which doesn't have a contract with operator so that is one of the major issues with streaming on this kind of wireless networks so I'm going to contain almost article 3gpp 3gpp is not really a standard it's something called third generation partnership program which is where you have pretty much all the big telcos like Eric's on nokia motorola docomo vodafone touches on that kind of companies and they made the file format called dog 3gp and then you can ask the question why its own file format in the beginning it was actually using them before well the answer is in 3gpp you use an aim our speech codec and in mp4 you allowed to have mpeg-4 or AAC our mp4 with ASC or kelp as the audio speech codec but you don't have anymore so that's why they created its own file for Nicole dog 3gp but it's very similar to end before which is very similar to quicktime it's built on actions etc it is very similar it has some extra atoms to handle any more in adult 3gp file you're allowed to have mpeg-4 simple visual profile level serum I will explain that a bit later with differences you can have h.263 baseline a more narrow band amor y them and AAC low complexity which is what you can have in and before as well and you can also have time text that's what can have in 3 p-5 this might supra note basic is not really in the 3 SB fires wanted to put out because the players on the phones are supposed to be smile players so the presentation language is smiled to bordeaux basic and in that you can call like three DP plus or tsp and i heard a lot of questions about it but it's actually smiling the epp uses smile as the presentation language so what's the different between 3gp pen is may assume many of you are or know about eyes may well one thing is this mpeg-4 simple wish your profile level 0 in RSM a you have level 1 and the difference between 0 and level 1 is basically nothing if it's 64 kilobits per second but on level c r you can only have one video object and on level one you can have four so this is just to minimize everything for phone so the levels here was created by mpeg-4 for 3gpp so that's why it's in felicia profile level zero you both have a AC upon you do streaming in is ma use generic a cute icing which my personal thought is is much better but in 3gpp they use Latin packet on thing and then of course it's the h.263 baseline and in ice make another mpeg-4 from simpler profile one two three I think they also put in advanced profile at this point and the a.m are correct so this is like what differentiates 3p benign MA and I samay is like CPP's northeast on the station body so that's why it's easy to compare it they just point at different standards which are used so a quick talk about terminals I say all support 3gpp and that's not really true but i'm from europe and in europe is very true so yeah let's start with nokia innocase the leading provider of of handsets terminals and everyone tells me that they use realplayer yeah they do but a real player in the nokia phones to port 3gpp so you can play a dog 3gp file in a nokia phone you can however not stream 3gpp2 it you can only stream real format but the new phones 6600 supports streaming of both 3gpp and real so if you make a dog 3gp file that will work in the nokia phones even if the real player in the sony ericsson telephones the t800 is very popular phone on this one with the gps telephone they have the packet video player this is an excellent player it's a poor 3gpp it supports streaming according to 3gpp and is ma so that's why i'm also going to talk about it later it's in quick time for instance you have an extremum but it's not streaming concentrated PP secondo is amazed but we work in certain areas on total and all use q 6 5 5 17 26 times 144 and then on top of this you have the motorola telephones you have the next telephone matsushita etc etc most of them in the world supports really PP and some of them also supports proprietary phone is like real or Windows Media or something like that so a quick thing about mms this is also something that's on the quick publish a lot of misunderstanding nms this multi mind formatted message it's like an email it's basically it's an email you something but it's to the phones and you can have g-tech images gif images a more sound you can have smile in it and you can embed it to your PE file can OTS p links etc so that's what an mms is so when you make a 3gp file and you want to transfer it to the phone it's not an mms message you're sending if you you're transferring a file and you're playing it back when mms is not the 3gp file you can use the 3d p file in lms and video messaging which a lot of phones have today is actually not the mms from technical point of view is more like just an email with an attachment but that is more moving into conversation so you have trouble sometimes when you make it play for one so now you want to send it to another you might not be able to play so the phone might not even able to recognize it because its proprietary way of signaling what channel message you get into the phone all mms is disputed by an mms see ourselves in multimedia messaging central is pretty easy and that's pretty much like an email server for all your work with I teen it is an email server basically yeah and when you get an mms you have something called notification and that is sent by the PPG push proxy gateway i think everyone also that is anyway what is that it is sent an SMS to your phone saying you have an mms and you say ok is fine you click ok then it goes to the mmsc and download it so it's like a store for a function exactly like in this SMS so let's get into talk about content oh so this is how it works how to get content and well I seal all things like the operation carriers and down then this is not reading their business but it's not going to look at it because they need to sew and many times they asked the wrong questions I've seen country I for instance me I was in a meeting with BBC and it came to be be seen it said you won't have streaming we won't have streaming content ABC didn't understand what we're asking about so they gave them now we have regular windows media file they came back and said Oh what we do all to do with this and said all we have to reduce not care because that's the only founded suppose real but what they should have asked is what kind of come to do you have what can give us because BBC has like I don't know enormous amount of mpeg-2 for instance they do not have a lot of screaming is just one percent which is setting a streaming format from of BBC produces for instance that is usually one of the questions that they asked the wrong questions so let's good for you to know if your content graders make sure you understand what they actually asking for it and also another thing is that Internet content you can't use that in the phones I also heard it but it's a lot of content on the internet what can I use use in info well please it's not adapted for wireless and if you just look at the size of movies on the Internet you realize that you can't get it into mobile phone and then everyone talks about real time trend scored again it really doesn't work because you would have liked this kind of building used to do transcoding in real time as a saint and a performance so the production wise well the production are off obviously not made for mobile phones it's a very few production companies out there which makes the football game to work in a cell phone and it's basically like the road like when you do encoding or compression for any kind of thing is that when you work with this low bit rates you want to avoid transitions you won't have clean tasks you don't want to tell too much sue me and I want to have too much movement and on the phone which have they even smaller is even more true and also it's like when they get content sometimes over it's not the production format it's not like I can sit down and edit you get like mpeg-2 or something which usually requires pretty expensive equipment to work with it so it's not like you're getting motion jpeg or like it ycbcr fight or something like that you usually get a distribution format and rice is another interesting thing which is an issue some operators have the right to the video the images but they do not have the right before the commentary so that means that they have to take it in put on their own commentaries on it so they need to edit and need to do voiceovers on the content coming in yeah so what I've seen today is that how to draw the business if the operator in the short term has to be the concentrator it has to take responsibility yes getting the content because it's hard to go to a counter provider and say I want to have content I want you to put it in three DP etcetera etc because it's not as much money for them to make at this point so the idea is that you migrate in the future from the operator be in the content creator supplier whatever we call it to actually get out to the real content creators so they need to migrate the business and say supplying them at home them but that comes when you have a lot of users of course because then is the business also through concentrators I'm not going to talk too much about this this issues could give you an example of how a streaming system looks at an operator but I'm going to do it very briefly from the left you have this cm which is the content management system and and then we have which I'm going to entail a product from us the compression ended which actually does the compression so you put in continent in the content management system it automatically encode it into into the countess performance you like to have and then it's being distributed into the screen service and HTTP service etc would usually the French and operate a carrier in this case from an internet providers that they have some kind of rtsp proxies or some point export or just be proxy does is it takes care of building etc because this has to be connected to billing system and still I don't think there's any internet service which really makes money so this is probably new thing so what happens is when I set up an rtsp call the proxy will intercept that it will go down as you see check with the billing system to see does this person have credit enough yes he or she does it also checks with the content management system to see if the unity price for the content is it per packet and from that it gets an okay or knock saying yeah you can play this content and after session is already creative CDR which is a seed or is used for for building actually so in the CDR it says that this person looked at this link for this amount of time whatever it is and then it comes on the bills you also have all this channel authentication down below you see you have triple a's that's the authentication service so when you login from the client you need to the network knows who you are and what accesses you have a spectrum it's a bit complex the whole Shane but this is just to give an ID on on how it works for a wireless operator so now we're going to talk a bit about creation and that's like it's not supposed to be there and cool this is a quick time I'll do it right them okay small operations and you can have a workflow which is pretty straightforward you have this contest is required basics you have like DV can or whatever is you use like sonic a pro or something you capture it in you edit the files you do the encoding of it into 3gp file and you direct to distribute it with quicksand i released which has three DP support any kind of third-party software can use this quicktime api to create content so even if you wouldn't use Final Cut Pro but maybe widor some other editing software you will be able to create 3gpp compliant contents so if you have quicktime pro in that you can export a 3d pspice but you don't need to have it if you're working for an application sorry if you're in like iMovie it came directly from their create dr. eup fun I'll actually show that that's why this isn't supposed to be here so now we're going to get into techy stuff about how en call so first of all we're talking about low bandwidth below 64 kilobits per second the most important thing is to have this high quality content coming using as possible this is true for all kind of angle and compression the best the highest for you can get that so she should start with one source of course use good quality codecs you have to do some testing to see which kind of codecs do you like how does it work high quality pre-processing it's just as important you have to scale the pictures you have to crop the pictures you have to correct gamma etcetera etcetera and you have for preprocessing well you don't get a good quality and also is that you have to reduce frame rates and of course you have to do that all the time I mean use reduce frame rate whatever you do when your intimate usually but on a wireless network is usually instead of maybe going to 12.5 its pile of 16 you might go to six point 25 or five or something like that because it's better to have better special credit spatial quality on the frame instead I have any movement because the screens on the mobile phones isn't that fast for the kind of motion that you're trying to reduce by having more friends it's achieved anyway on the mobile Falls it's better to have lower frame rate and better quality only on this on the frames itself you have bandwidth constraints of course and all of you see there are constant bit rate I don't know how many of you really knows exactly what it means often Beatrice is not flat constantly that means that you can fluctuate within a certain timeframe and that is set by the video buffer verifier so if you set it to two seconds you will have a window going over this file all the time and under those two seconds if you set it 64 kilobits per second it can never go over that so that is how the video but verify it works so that's very important we have very very constrained downward drop frames if you have an encoder which can drop frames to maintain good grades use that because this is the most important thing my wireless you don't have any hand room to work with and of course natural key friends is possible that's the best way to do it but also if you can add on the longest distance between the two a key frame because that also have to do with error handling if you lose a keyframe you don't want it to take too long until you can recapture we capture it or on the images and of course error handling in radar net we're going to talk about streaming but if you want to be able to set packet size how many frames per packet etc and something called our VLC reverse length coding and that's very useful for when you have congestion on the network so the codec can determine itself that on the players find that it can build sort of new pixels so this is dependent on it on the players you can use or VLC and also some operators have video telephony and they want to use video telephony to play static files not being alive than you usually need to use or VLC because that's how the video telephony client expects to get the frames also what we talked about before is that make short clips before capacity increases it's about 30 seconds a minute that's good file lengths to do it as i said before new users are prioritized themselves and coming in speeches prioritize etc make short clips because speech as i said as prior to order all kind of data so streaming vs. download well a streaming for wireless the process of course that memory capacities homes are limited so streaming in that sense is very good it's less overhead in RTP than an HTTPS you can put more pictures of bits to the media itself which of course is very good on this low bitrate it's lightweight drm in itself because you have to be very skilled get into phone hacking and download the video on the other hand why do you want to download the video of 64 kilobits so but that's one of the things and it usually is viewable in about two to four seconds cons yeah of course firewalls same thing firewalls firewalls and it's not supported by all those phones present I think most of the phones by the end of this year and the beginning of next we'll have support for streaming download well its support by old phones all phones so that is a good thing of course the concepts that most an advanced support progressive download which might seem a bit strange but def if the fact it doesn't support interlaced content so it needs to be fully download the course before you can start viewing the pictures images or video for air and you need a large storage on the phone in ourselves on a computer you don't it's not anything launch but you still need to have the storage so this is the thing everyone tells me out but the quality of download files is usually much better because you're not constrained to bandwidth limitations you can have a higher bitrate because this is download time well yeah that's true for internet and it's in theory through the wireless as well yeah but the download time well if you have breaking news and you have to wait four minutes to get the breaking news it's not breaking news anymore but one of the more important things is that you pay per packet so even if the download extreme you pay for the amount of packet you send and then people say well if you should arise the unity price sometimes well the operators cost for every packet and this is what drives it if you can make content on a lower bandwidth good enough so the user wants to pay for it and its cost as little as possible for operator then when I'm going that's when you're going to get business because it costs for operator so you have to treat download at the stream you don't have to be s constrained but don't think I can do 300 kilobits per second because I won't have a better quality because the operator or your customer wherever it is will come and knock on your hands and things like that so this is very important to think about so this is where the QuickStart thing was supposed to be so let's get over to this machine which is laptop number one do i change the you change hmm all right what do you want me to do ah so that's how it works so let's take a look at quick sign them I have a small file here somewhere this is just a little video this is motion jpeg go to protect innocent okay I kilohertz p.m. sound so that won't export it into 3gp file I get in movie 3gp as always I mean like you always do put on desktop and I have the options so on the file formats I have something from mobile mpeg-4 and this is basically dumped for docomo and I don't know that much about this so Apple has to answer questions about it but this is basically down for document because they have an mp4 file format which is basically where you can have anymore and things like that so now we're going to go to 3gpp so if you release 5.1 means that can time text in it for three you can't so basically I don't have text right now so I can choose whatever by us use the 5.1 I choose the size and in this case it's cubes if for me because the three PP says that you should use cubes if format which is 176 x 144 or sub 2 uses which is 1.8 x 96 one interesting thing here is that q6 aspect ratios 11 9 & sub juices is 43 and usually do you do wrong with that and on all the track on this case i use i say i want to do speech so video i have my mpeg-4 correct i can use h.263 for instance but I choose to do it I do this that 40 kilobits a second I used for 12.5 frames at this point because it's all contents which 25 sites that's why I central point 5 I put key frame every second second and in acs it's all your speech and this is a more narrow than you're using right now and you have fixed bit rates for it as you can see when you drag it and this is called modes and this is mode 7 the highest one and it's always moan of amor only two personal mono it's always a thousand kilo hertz of sampling frames per sample is when you do streaming and then we come into the things about streaming well if i do streaming basic if it's quicktime pimping this is not 3gpp hinting but it will work in a ph on the princess and we probably work in some other phones as well because some of them support stream including flights may but in this case I don't want to have it streamed so okay put it on desktop save and off we go so this can now use in quicktime pro as i said before but this kind of thing is accessible through the quicktime api then II kind of third-party software any kind of software can use this to create this kind of content then it is so there's not much about cropping and setter pre-processing but that is what dat account software you probably use to you can do that in so that's how you build it on top of the QuickTime 18 18 diversity and this is just the 800 megahertz old powerbook so don't worry about the speed I think Oh so here's the file what we sit which is beautiful a mark on this is a personal account for this camera okay full of rich audio but that's what we have to live with some fun here suppose not yeah so let's get back to the slide am i doing something wrong no now it is oh it's not huh so what I showed the right now with small operation this is where you can use like fun touch pro or that camera editing tools and directly go to 3 p-5 can use quicktime pro if you have that to taking fast edit them do that kind of thing when you get up to a medium scale operation when you have more content coming in from several sources where you have like several editing station like some calpro etc then you have a demand for lord you're sort of of tools so what I'm going to show you right now it's actually for my product or compression most which isn't released yet it will be released on the sixteenth of your life so this is visa version and all of you know what betta means so let's go over to the laptop oh great so this is the compression monster and we're going to start to do some files here we're going to start with some settings actually so I've done for setting slippery and there so I open up this and we go to the 64 cave it any in this you of course you do the same thing issues the file format you can choose a lot of other but now it's talk about 3gp so it's a three DP file I want to use them take for a more narrow band I want to do streaming so let's move on to video sign on the video i put this into well 64 maybe 42 probably something like that I put the keyframe at 25 because bill this is pal in format i'm going to use simple profile levels here of damping for it is very important why there's a button like this is because the am peak force usually detect depend on the bit rate which profile it is but since profile 1 and 0 is basically the same you need to be able to override up and it also is because some operators will come to you and say I want to have 128 kilobits of content but it still has to be simpler we should profile level 0 so this is why I have this all right thing then we had a buffer verifier and I should actually set this to the bathroom on the phone so if you know that this phone have a two second buffer usually the 3g phone it means that it can handle 64 kilobits a second we have to sort of calculate as well but it's at 52 seconds the sliding window order over the content will say that all during this two seconds line women can never be about about 42 Killiks perception I say Frankie probability which in this case is dropping frames because I want to make tain the pigs and with so i put that pretty high like foot four percent or something and i can use like or VLC etc but that's not what i'm going to do right now i put the frame rate down to six point 25 frames per second because i'm thinking about i'm going to play this on them i don't know i can say that brand but it's a Swedish brown and I choose the QC formats I can choose whatever I like actually but they used to accuse the format of the days now I don't want to do any crossing on this file so and then I can do like you know gamma correction all that kind of thing but that's not really important outfit for the demo audio same thing a more narrow band 12.2 kilobits per second sample rate etc I can do meter data output in stream and I say five frames per second five frames per packet for it so now I've done my settings can take a look at some others as well this is like a 128 but the important thing here is about the boundaries constrain all I doing is I'm trying to keep the bandwidth that's the most important thing which means sometimes I will get a lower quality but that's actually the fact of life so that's how it is so let's put in a file let's do the same song as we did before I add on setting to it so I used to 64 and I put it on desktop and off we go and this is of course how you can do batches you can put on a lot of files a lot of settings it's just about you know how many files you want to do and with this sense you can build a small but very fixed effective systems you can have several editing station commenting which is like motion jpeg or the explorer s native from from Final Cut Pro land use put it in here you have your settings which you created you can see to work with them if you like to or you can use to use the settings you've done once so if whatever one is going and let's get over to the slides Oh will go up this one so when you have a large scale operation down well then you need to have an automated system and that's exactly what we built so with the compression master you can export XML settings the settings i showed you before can be exported and you put them into something called the compression engine which accurate watch folders so when you done this once the content provider can put in like MPEG tucson a watch folder and the compression engines will automatically start the encode for it so just to give you an idea is a small an average portal if you look to the right you have like two news feeds 10 times and 30 seconds financial information traffic is not a lot of info it's not a lot of files we actually know 10 call it it's not a lot of relocated from from sort of service it's not that much but it still generates a lot of data so you have about 20 43,000 maggots that has to be converted daily and its turnover time from you drop it into the system should not take one in one minute and then you need to have a pretty powerful system to do that so this is a real world example of how an operator works and they hired a post production company which has the compression monster which creates the xml settings so they work like a sort of quality quality or you say quality control of how it's done and they can also make like trailers of Nemo of course very good film into directly and work with it because it's a trailer you fixed on you work with that you test with it and you make this in the 33 file you send it to the operator but when we talk about automated service like new sports etc what happens is that the broad causes deliveries as mpeg-2 funds which they haven't like the grass valley servers or quantel whatever it could be and it takes this mpeg-2 thought we should produce anyway so they don't have to do any special production in their case they don't have to do any pretty formatting or files they use drop it into the watch folders and the compression engines on the Rights which resides that the operator stops automatically to compress this into 3gp files and the other thing is that they also taking files and they do editing of it and it's a taste transfer so they take its tape take the tape put it into like Final Cut Pro edit it and implicit into the compression monster under compression aliens and this is pretty cumbersome so the next step what we're looking at is to set a compression engine at the Compton provider lil having the post-production company delivered the xml file to controllable channel settings that is the production company drops their mpeg-2 directly into the compression engine and it goes maybe as a yuri file so you can edit it in the Final Cut Pro without going to tape which takes a lot of takes away a lot of time or if you go directly to 3gp file so you will be able to remove that that's how an operator works today so right now i'm going to show you let's go to a laptop about how this workflow actually goes so in my compression mode right now here is right now are looking at these machines I have a watch folder on these excerpts which I see here I've done two settings what i can do is that I can from here exporter setting so I take this on 28 I don't think I how does one nope so let's export this one so i exported from dec sport yes so that's one as well so now I have this setting so now I'm going to move it over to the compression and inside you smooth it over this is demo gods so so now i have three settings in here so now i can take any file from here when i've edited and i can drop it in and now it's a 100 megabit network so it will take a while to do this so while I'm doing that we can switch over to this machine because i'm going to put in a lot more files but it will take too long time to do it from there so let's go today serves so right now here is my watching folder and now I've done some media files I'm copper this one this is the 30 second clip so let's put this in so now I'm coping it over to the compression engines and I don't know if you can see if it started working anything I'm still coughing so do a refresh and probably saying this anything so not a faster coming out and this is done through automatic on this excerpt so let's step it up let's study in some mpeg-2 so take all these put them in there as well oh the netbook hates me so still the father coming out there so we can take a look at for instance this one this is the M take 25 which is converted or the only this is fast coming out of it mr. Burke sorry yeah sorry about that so in this way i can use have it this system running all the time and it does it fully automatic and it i think now it's a lot of fuss is it working does anyone see anything one of them o Network story about that see what happens here this is typical Oh well anyway I'm putting in like 60 fonts in these systems so now it's starting automatically and this is the kind of system that the operator needs to have when I'm talking about automated processes so they put this sort of clusters of endings of excerpts for instance and they just drop being fast and they work towards doing this because the turnover time has to go so fast to do this so they really need to have it working like a one-minute clip should come out in the phone within them within maybe one to two minutes later on so that's how fast it needs to go and since the network isn't really doing was supposed to do you won't really see this unfortunately well can't go today yeah you have it here so now you see the file for coming out there so this is like the another restriction mcneil video and I see this is down from mpeg-2 so the quality becomes pretty good if you put in really good content because this is this is a 64 kilobit total so there's the video is about 40 kilobits a second at this point so I think you get the idea on how their compression engines work and you have even more false working I think now most of them are up and running the excerpts so let's go back to the slides so to conclude it yeah first of all you need to understand the operated business you need to understand if it's a unity price this is price for packet and you need to understand if the operator is actually competing with services because today no press will compete with what kind of service you have to really need to understand that you need to be fully integrated with existing production environment which means that you need to be fully integrated weird like what the TV producers like or doing like NP to whatever it is so you can take the kind of formats and then with the legacy systems as well so you don't add any time on that and of pre formatting time to show time is very important breaking news have to be breaking news because why should you pay for service to mobile phone if you won't get it before anyone else if you can just go home and put on the TV and the output format I say shall fully support the standard set by 3gpp because that means that you will have the most coverage of old oil terminals telephones etc use this high quality source material in as possible because that's that's the only way you can get really good quality and I kind of low bit rates and so don't use like pre-compressed come to like from internet or whatever it is yeah I understand the next word constraints don't understand how bandwidth how much bandwidth you have to play with how you prioritize how the operates private types of services this is very important to know the price has speech how much do you get three times lots we ended in etc of course most i mean obvious thing is optimize the compression for distribution in wireless networks and to be displaying the mobile devices streaming versus download sensing their trees download exactly as a stream because the operator has a cost for every bit yeah and you definitely need to be the expert because this is new for operators even if you don't work with the whole Shane you need to understand how stream server works you need to understand maybe how they're all the FV proxy works you need to understand all the way so be the X would help them out because that is one of the major problems and the most important thing is test it seems like I've heard so many people saying well we did a cliff then we tried it in a phone and it worked and that's all I do this is completely new for all people involved doing this kind of services we really need to test the trial to see how does it look like an accountant can I have how does it work etcetera that's the only way to do it so wrap up which means you hiya handsome very much for his presentation next we usually go through a road map slide unfortunately seven secession 721 that was going to follow the session in the room next door has been cancelled so I encourage you to go to session 722 advanced quicktime interactivity which actually is in this room then on Thursday we have a variety of other quicktime sessions and of course our feedback form that's going to be at three-thirty and it's now in the marina room we also have a couple of sessions on Friday as well if you have any questions about quicktime development please contact your mole Ortiz who ours our quicktime technology manager at quicktime man at apple com for more information we have a list of these websites for you first of all there is a lot of information about 3gpp on the apple com website pop wire technology can be found at pop wire calm to look at all the products that Papa has created for this industry obviously there's some general information on our website about quicktime develop for information and so forth some other things not to miss hopefully you seem use a couple of times by now but we have a QuickTime content creation and QuickTime development lab the lab hours are they're open until 6pm tonight then Thursday only until four-thirty and also on Friday