---
title: WWDC2004 Session 718
framework: wwdc
role: article
path: wwdc/wwdc2004-718
---

# WWDC2004 Session 718

## Transcript

Kind: captions Language: en my name is ELISA Hutchison I'm with Quicktime product marketing it's my great pleasure today to have two speakers for you we have goodra Negar the director of communications for a CMC graph and we also have Dave Berggren director of technical operations for soma media so I'd like to ask if we could hold all of our questions till the end and we'll do a short question and answer and with that I invited Gudrun up on this to the stage [Applause] [Music] Oh [Music] [Applause] [Music] [Applause] [Music] [Applause] [Music] [Applause] [Music] [Applause] [Music] good morning thanks for joining us this morning again my name is gudren enger i'm the ACM SIGGRAPH director for communications that is my volunteer position at a CMC graph for my day job I work at Stanford University and I'm here today to tell you just a little bit let me get to my slide there my slide I have three points today I someone tell you a little bit about our organization I want to tell you why we chose some of media to do our product and what our plans are for 2004 and then I'm going to turn it over today that he's going to give you the technical background of the product because that's of course why you're here a CMC graph for those of you don't know is a professional Computer Society it stands for the Association computer machinery special interest group computer graphics interactive techniques we are a volunteer run organization with about 6500 members the majority of our members are extremely technical they come from they are researchers they come from industry and education one of our events every year is our annual conference which is typically held the end of July beginning of August we have anywheres from 20,000 to 50,000 attendees at this conference the other events and activities that we do as part of our Association include chapters educators program symposia and other co-located events the annual conference is our biggest program but it is not you know it's not our only program but it is where we have the most of ability this year's conference will be in Los Angeles the second week of August we have technical programs which include papers panels courses sketches which are short innovative new research and special sessions we also have a keynote and awards ceremony in addition to the technical part of the conference we also have an art show and educators program the electronic theatre and computer animation festival which the clip we just showed you from that and of course in a large exhibit hall so one of our our main goals we we do we try to do a membership survey every couple of years and one of the things that was continually coming out in the membership survey was that our members wanted to see more content from the conference and have it accessible online and so we over the past three years 2001 2002 2003 we've been doing pilot experiments to see the best way to capture that content the best way to deliver it how to put it online how to keep it safe all these kind of things last year we teamed up with some emedia to capture a small portion of our conference basically that all the technical content that was in two of the largest rooms at the conference that included most of the papers a couple courses some sketches and a couple special sessions this product proved to be very successful with our membership we we had originally anticipated that we would just offer it online and we decided someone was pushing really hard to get us to do a DVD product of it and the executive committee of ACM SIGGRAPH was not so sure but in the end we decided to do the DVD in addition to the online streaming application and the DVD sold really well at the conference it sold really well after the conference we've probably had more interest generated about the DVD than the online streaming version so we're really pleased with how that's worked in the future though we do hope to you know we we plan to continually offer both because ACM has a components called the digital library and all of our content from the conference goes into the digital library so the OSA from soma will go in there as well it's just another member benefit that we're pleased to offer the reason we chose some is the solution that they offer is really cross-platform it's not browser dependent which a lot of the other solutions out there are it works well on Macs and PCs we have a large Mac population highly technical users there a lot of the creative folks use it as well as a lot of the researchers and technicians it's a flexible system by offering the DVD and the OS a we were able to allow people to take it on the road with them as well as sit and use it in their office and overall we're just really pleased with how it turned out our plans for 2004 are to expand the content capture we plan to capture all of the technical content at the conference so that's all the papers courses panels sketches special sessions and it's in ten rooms it's approximately 300 contributors with 250 to 300 hours of video and PowerPoint presentations the other thing that we're doing this year is we're only going to capture video in the two largest rooms for the other smaller rooms we're going to do just a head shot with the slides and audio so I now want to turn it over to Dave Bergen who will explain exactly how it was accomplished thanks [Applause] thank you very much good Hren ELISA for the past several years Apple computer has recorded the Proceedings of its Worldwide Developers Conference on DVD ROM in the lab when did it be great if every single conference we attended would also be recorded if that were the case we would not miss a keynote speaker we would not miss a single session we're able to see the session we wish and see it any number of times we want we we would be able to instantaneously jump to the presentation we want to see to that particular slide we want to study and we'd be able to review the material sufficiently to absorb the knowledge being disseminated we would move our exposure to the material from the level of awareness to the level of comprehension this ability would allow us to jumpstart our research in our respective areas of interest this newfound ability would also allow our colleagues who may not be able to attend the conference the opportunity to share in the knowledge being disseminated at the conference Souma media specialist --is in creating knowledge dissemination solutions to help organizations distribute their content beyond the walls of the conference center in 2003 ACM SIGGRAPH hired someone media to record a portion of their conference on two DVD ROM and the web this year we're recording the whole SIGGRAPH 2004 conference and also putting it on DVD ROM in the web today I'm excited to be here to present the process of creating the 2003 DVD ROM and our online streaming application or as we refer to the OSA okay so here's the agenda for this morning I'll briefly talk about someone media our company the benefits to conference recording what you'll learn in this session and then we'll go in-depth on the case study for the ACM SIGGRAPH DVD rom and OSA then we'll talk about the technology framework the technologies we used in the workflow the improvements that we're going to introduce in 2004 and then I'll conclude and as time for some questions so some media specializes in knowledge dissemination solutions we work with the organization to come up with a custom custom solution for them we provide complete end-to-end solutions starting with the logistics from from pre-production all the way to delivery we handle the speaker permission forms we capture the content we compress it for DVD DVD ROM or the web we author the content we create the interface do all the design and the packaging and we do the sales and marketing including all the print materials and having a sales booth at the conference including a sales team so here are some of the benefits obviously it's recording the conference is a great way to create an organized archive of that conference currently right now there are I think eight other presentations going on so you because this conference is being recorded you know you'll have access to the other conference that they offer other presentations as well when it's available online or on dvd-rom people that couldn't attend a conference can still participate and actually see the content that was that was presented at the conference a huge benefit also is being able to watch it on your own time this is great I mean you put pop it into your computer you go online on the internet you choose to see what is choose to watch the presentations when you want to watch them and finally a recording a conference can be a general revenue generating source for conference organizers kind of can help to offset the expenses related to actually recording the conference so what you'll learn in this session is our knowledge dissemination solution that we came up with for SIGGRAPH working with them you also will talk about capturing content efficiently how to avoid the bottlenecks and developing a workflow with your software and the technology that you're going to use to develop the project so here we're going to go in-depth right now onto the case study for the ACM SIGGRAPH 2003 conference present patience so at SIGGRAPH 2003 there were some physical constraints we weren't recording the whole conference we were recording only two presentation rooms the main two presentation rooms which included most of all the paper sessions some of the courses it was five days of recording and this resulted in about 800 gigabytes of video that was digitized on the fly at the conference we also captured over 40 gigabytes of PowerPoint presentations and extra videos including 101 total PowerPoint presentations and 140 extra videos so what we delivered was over 62 hours of video on two DVDs 115 presentations that's included over 4,000 synchronized slides and 140 of those videos were synchronized with their PowerPoint presentations so we had a two disc DVD ROM set the first disc was the papers disc it was on a nine gig DVD ROM the second disc included the keynote the courses the special sessions and the sketches and that was actually on a a 4.7 gig DVD ROM and then finally we had created the online streaming application so we captured 78 out of the 81 paper presentations I believe the three presentations we didn't capture were due to copyright copyright problems that we weren't allowed to record them we captured the keynote the four court record for courses that were presented in in the the two rooms we recorded for the special sessions and one sketch so these were the technical requirements for producing this product but we had to come up with a cost-effective solution with a low sale price the price of the DVD it was $79 for for non-members and $59 per member so we had to keep it as a costs low it had to be cross-platform so it had to work seamlessly on a Mac and a Windows platform had to work also on the internet and DVD ROM another important criteria is the slides had to be legible so the president patience screen when I'll show you in a few minutes had to be big enough so that you can read all of the all of the text displayed in the PowerPoint we also include a chapter list I will go through what the chapter list is it basically divides the presentation allows you to navigate the presentation by the slide titles so each presentation is divided into their slide titles and you can jump to any part of the presentation seamlessly we had to include as many extra videos in demo SIGGRAPH shows a lot of demos kind of similar to here at the at this conference where they show a lot of different types of demos of new technologies and everything had to be synchronized the final requirement we actually there was already a vcruz in the two rooms and we had to work with their technology and find a way to link that to ours our setup now we also handled the sales and marketing so we included all the marketing materials this included flyers that we that were in all of the the conference bags posters we had two booths at that conference and a sales team we worked with ACM SIGGRAPH to come up with an online ordering system and we had a we have a website with an online working demo of the product now we also have to deal with the speaker related issues which meant collecting all the speaker permission forms since it had not been recorded speakers had to be contacted and we had to record we had to collect all of their their speaker permission forms collect also their slides all their extra videos and demos so we set up an FTP site for them to upload their information we also had to include we had to remove the copyrighted images and sounds a lot of presentations at SIGGRAPH refer to films movies and a lot of times you don't have permission to actually you can show it at the conference but you can't actually show it or record it for the DVD okay so let's move to the demo actually can we have the other demo the one on the the g5 okay so this is the papers disk and I'll go through the interface a little bit we had to develop every year SIGGRAPH I guess they come up with a design for the conference with graphics and logos in certain fonts and styles we created an interface that worked with with their design requirements we also wanted to create an interface that was easy on your eyes oh because if you're going to watch a presentation that's 25 30 minutes long you don't really want something you want something that's very easy to look at we developed the interface like a player so you can easily move through you can easily select any presentation by their event here it's the papers disc and each paper topic we divided it by day so you have Monday July 28th and if you scroll down you go all the way to Thursday and these are each of the session titles so if you click on a session title you'll get selected there are four presentations that were that were presented during that session and you'll see the speaker as a speaker pick and they're titled their talk so you can click on will click on the Veck so your video plays here and your PowerPoint presentations are here so it's fairly large screen size and just to begin you simply press play I start by showing you four examples of what we were able to achieve using our technique here's an image of two water leaves that we found on the web so you see it's all completely synchronized it'll keep switching the switching the slide throughout the presentation this presentation also includes some of the demos and animations this one is showing an animation so we integrated it and synchronized it inside the presentation now they mentioned before this is the chapter list so you click on it and you'll notice if you notice in the scrubber you're actually moving through the presentation all by there slide titles so here's the thing on the patch placement and here's another video that was included in the presentation okay well select another topic now as I mentioned before we had copyright issues that we had to deal with this individual Alice Scheffer she actually had a picture of Madonna that was taken from the magazine so what we did was right over here we blocked it out we had to do that on a number of presentations where there was images that had copyright issues I'll show you another so I selected shadows the paper topic and the title of this talk was a geometry based soft shadows you'll see the slides are also this one's all everything's in sync this one also included an animation so ever speakers provided us animations and demos we included them now move to another topic on Thursday so they get my control back this one actually the individual included a quick time vr he sent it to us he probably didn't think we would actually include it in the presentation but we actually did here's his full QuickTime VR and you can actually move around move around the space that he had said he had given us I'll show you a final so any video that we were able to include we were able we put it in we compressed it and we synched it with their PowerPoint presentations can we switch to the other demo machine okay good okay so I'll show you the keynote because I'm going to talk a little bit about it later at this moment it's my very great pleasure to welcome Anthony Lazenby I said graft 2003 now so he also really animation enables us to go beyond this and he had many animations throughout his presentation look you'll see the side in the video is about three is 320 by 240 the size with PowerPoint is up in 548 5 more 11 so fairly animation large size when I show you the OS a little later the video liberal smaller but the powerpoints live Phil because it still be quite large ship in the 3d hyperbolic space now this new technique we call conformal Jim now this presentation and exposure look you that minute to make it here by agreement just to show you that some of them included a lot of code well we wanted to make sure that people can read the code so the video had to be the video presentation screen had to be large enough so that people could clearly see what the speaker was talking about and I'll quickly move on to really interesting and interesting and talk this was a special session that included a demonstration of a robot that Sony was developing and loudly so this was right live at the conferences over the little fellas and his that his the he actually does it performs a dance during the during the car during the presentation I'd love to know and this song that he used was copyrighted and so Massa he doe contacted us and said well we could show the video but we can't show the song so we actually went through the video and muted out the the dance sequence just to just be so all through this the audio is muted out but you get still see what was shown at the conference the robot was actually interpreting a song so it was coming up with the dance moves as it wasn't a pre-programmed thing it was actually coming up with the dances according to the songs beat now I'll show you a last demo with the disc okay so the quality quite excellent this is a den of the promo for the NHL me le King okay let's go back to the slides and let's see how we put this all together okay so these were the challenges the first one is how to digitize live analogue feeds to hard drives and tapes then how to compress 800 gigabytes to less than 17 gigabytes because we figured at the time that we were going to put it on to 9 gig DVDs we actually got it down to 11 so that's why we had one 9 gig and 1.1 44.7 gig DVD next really large challenge was synchronizing 4,000 slides with their videos and then synchronizing the 140 videos with their slides now the conference was at the end of July we did about about a month six weeks of work pre-production before the conference getting speaker permissions and doing basically most of the authoring and collecting the slides we had a deadline in October we actually finished work on the product October 8 we had sent it to the DVD manufacturer unfortunately DVD manufacturer took a lot longer and we ended up delivering it in November not in October so here's the technology framework everything begins and ends with basically with authoring we started building the whole I shall the whole project in developing the skeleton structure within the authoring environment we collected the slides so we collect as many slides as we could before hand their animations and videos we started doing the compression but we basically waited because we know that speakers are going to change their slides which often happens right before the conference so we did most we did all the compression afterwards and then we created a chapter list for the present for the slides at the conference we captured the video then we compress the video and then we also created it we did that we created chapter list so that we could synchronize them so everything was done in the authoring environment to synchronize the chapter list and then we delivered it to both DVD ROM and on the web with our online streaming application so let's begin with authoring the authoring environment had to be cross-platform it also had to be robust it couldn't you know we didn't want it to crash wanted to work on a large number of machines we wanted to be able to also create a really intuitive interface that was really easy to use as I showed you a three clicks basically gets you anywhere in the in the player and you can watch any presentation very quickly we also wanted an authoring tool that we could build before the conference and have it all ready so that all we had to do was compress the videos synchronize them and put them into the authoring environment and then very importantly having a file naming system something that you do in the pre-production so makes your life really really easy so the authoring platform we chose is tribe works I shall they're actually they're head offices not far from here and mainly you chose it because the cross-platform work Mac Windows seamlessly we can deliver on dvd-rom on the web with very minimal changes the only changes we had were the videos themselves one is going to a QuickTime streaming server with the web version the other ones reading them off the DVD as well tribe or ty'chell is really an easy to use object-oriented environment so that translated really fast development times the whole interface was developed in about two weeks the authoring environment also allowed us to do the synchronization because it includes advanced controls of QuickTime with the chapter track so we did all the synchronizations between the presentations using capture tracks so how did we capture all of these chapter lists well we did a lot of it at the conference itself we captured the slide timings right at the conference put it in an Excel spreadsheet that had a macro that that outputted formatted text file ready for the chapped ready for embedding into quicktime we also had to then with the chapter list check the timing there like verify that at all was whether it was working properly that the spelling of the the president of the the slide titles was correct and that we could add these chapter lists at the end to quick time because we had to do all of that before we could start synchronizing them because we had chapter list and both of them in both of the PowerPoint and the video so this is how we captured the content actually at the conference we got the AV source footage from from the AV crew at the conference we used the Canopus advc 500 this was a analog to digital video converter it actually goes both ways digital to analog and analog to digital has two outputs one firewire and two firewire outputs that we could use one went to a DB cam deck that was actually our backup which we never had to use and the other went to a fire store which converted the video information and stored it on our low c 500 gig hard drive so this is where we actually had two hard drives at the conferences and in the two rooms and we were able to easily able to capture all the presentations in those two rooms as we had a terabyte of storage and we only can't we didn't fill up we didn't fill it all up so after you have the content you got to prepare it for compression we had all these many of them were forced for presentations per session we recorded the whole session so we had to think of what what video editing software on t'do was the edit editing the in and the out points we also wanted to be able to remove the copyrighted materials quite easily and we wanted to use the functionality of the QuickTime reference movies so what we use was QuickTime Pro mainly logs cross-platform it supported the different media types video audio text for the chapter list QuickTime VR which was great flash which we didn't have to use but there's so many things that you could do with quick time and having the editing capabilities right in the right in the program was fantastic so all we had to do is set the in and out points and create a reference movie script ability is really in key we didn't take advantage of it as much as we will be taking advantage of doing scripts in QuickTime of course adding the chapter trash we were able to remove all the audio all of the audio and copyrighted images and sounds all within with bit QuickTime Pro and we use QuickTime mainly because we've used Sorenson video 3 in the past and we're getting into using mpeg-4 and they work they work flawlessly for us so QuickTime was our solution well now we had to move on to compressing was not Amal prepared the contents all prepared but we had to compress the content so we had to determine what kind of compression software we've used different ones in the past but we wanted one that was fairly simple to use again that worked that we could come up with a workflow so once we edit all the videos we can get it into and start compressing them so we wanted to be able to control the settings for compression and do small adjustments to the audio and the video so the compression software we used was so instant squeeze 3.1 why it was really simple to use basic image adjustments all we wanted to really do was crop D under lace and adjust the gamma so that it would look equally good on a PC and a Mac with our as we were editing the videos and saving them as QuickTime reference movies we were dumping them into our watch folder so once we had our compression settings it was just turning out the turning act our computers were compressing for us in the video and of course it output it to the two formats that we the two compression codecs that we wanted to really use was Sorenson video 3 for the DVD ROM and mpeg-4 for the online streaming application and one final note we didn't actually have we didn't it didn't crash the only time we had a problem was when the power went out on the East Coast we were out for four days and that was right in the middle of our encoding but that was the only problem that we actually had what someone's in squeezed so it was really robust for us for our purposes it's a little bit about Sorenson video 3 Pro we used it before in a previous project we knew it fairly well work great on the DVD ROM gave us really high quality video as you could tell at the conference very small file sizes and we can optimize the compression settings now it the fast compression times we were able to achieve really good compression times and like the example here is the keynote which was 48 minutes in length we compressed it in ninety minutes on a dual 1 gigahertz g4 with 1 gig of ram and that was at a resolution of 320 by 240 now with mpeg-4 for the online streaming application we used it because it works great with a QuickTime streaming server really high quality and low bandwidth I will show it show you that later really excellent audio codec also really fast compression times our keynote which was 48 minutes compressed in 60 minutes on a dual 1 gigahertz g4 now the frame sides a little bit small I'm not trying to compare the two codecs here I'm just trying to give you a point of reference in terms of how long it took us to compress compress the compress all of the video and basically at the end the video dvd-rom all of the videos that we compress on the DVD ROM took less than a week so it wasn't really the bottleneck of the project now back to the technology framework we went through the authoring went through the slides capturing them how we collected the chapter list and the key is that we synchronized everything on the chapter list between the slides and the video so now we're onto the delivery so we put it onto the DVD ROM and then on to the to the web so here are the differences the DVD ROM has 140 demos and animations it's on two disks it includes a booklet so you can actually use it as a reference to go through the to look for the presentation it's higher quality the video quality is better this video quality is larger and it's smoother and it's available for members and non-members on the other hand the online streaming application it's just one interface which I'll show you and it's free to all ACM and ACM SIGGRAPH members okay so we'll go back to the demo on the g5 and I'll load up the let's get it so this is the online streaming version it checks the internet first see if it's there actually just paying a server and then it will load up this version actually doesn't have the login on the one on the the net has a login so you have to be a member and it won't let you in unless you're a member so the nice feature about the online streaming application is the papers special sessions they're all in one environment so you don't have to change discs okay here we go so this is all running online right now here from the conference so you have the keynote the papers the courses the special sessions it actually tells you at the bottom select an event so if you click on the keynote now it's downloading the in next section it's tells you at the bottom select a topic and you can click on the keynote address and Anthony Lazenby and it tells you select a presentation you know it's the blue highlights as you go through the process so we try to make this as easy as possible alright so let's press play to begin so this is connecting to the QuickTime streaming server at a CMC graph you notice the video is smaller 240 by 180 but the PowerPoint it's bit more compressed but it's the same size so you still get to see everything clearly and one great feature is the chapter track still works so you can jump through the presentation just like on the disk administration now the only difference is you don't get the animations we weren't finished put that much bandwidth issues really on onto their server so all that streaming right now is his presentation so you do lose out on the animations but you get the full PowerPoint PowerPoint presentation feature I didn't show earlier you can actually move through this presentation to pause the video you can move forward and backwards so if you want to scrutinize a curtain of a certain presentation or certain slide you can go and just pause it and look at the different slides that way so with this interface we can also see the papers which is really really handy and you'll see that it'll load up over here obviously it's not going to be as fast as your internet connection it's going to going to be gives you a little watch and it'll load up the slides over here I'll show the VEX again and you'll see that there's no video or animations in that some presentations obviously take a little longer to load as it is downloading it from the internet now it's connecting it to the stream I just start by showing a few examples of what we are able to achieve you can not check the audio quality it's really good that's really key you want to make sure the audio quality is reducing that's what your you're listening to image if you can see the synchronization everything is all functioning very well you can adjust the volume here and you can again go through the presentation quite quickly so if you've seen the presentation you're interested in particular section you can go to that area and it'll jump right to that area it's really handy feature okay let's go back to this slide so what were the bottlenecks a lot of people would have thought was the compression eight hundred gigs down to seven to eleven gigs how long that would take well it didn't take that long once we had edited all the videos didn't take that long on the two machines that we had dedicated for encoding what really took a long time was developing the chapter list and creating and then synchronizing those slides with their videos and making sure that the synchronization was correct also synchronizing the extra animations with the slide there's all sorts of issues related to that now the speaker permissions forms that was also a bottleneck because you're contacting the speakers after they've already been accepted to speak at the conference and you know they're busy and they have to sign a form fax it in they've upload their slides you're asking them to do a lot to do and sometimes it's hard to contact them and when you're contacting 120 people it took a long time to get through we still collected speaker permissions long after the conference was through mainly because we want to include as many presentation as possible on the DVD ROM and the online online streaming application removing the copyright copyrighted material so that took a while because we had to go through each presentation we knew on the speaker permission form that they had copyrighted issues but we had to develop a way to kind of remove those remove those images and sounds that we clean we couldn't record or couldn't keep in the presentation and of course testing and troubleshooting that took a fair bit of time to to go through to make sure it ran on a number of platforms number of different computers and make sure everything was working correctly and then of course the manufacturing of the DVD ROM that took way too long we were really disappointed in that so how are we going to remove the bottlenecks for 2004 the last last year's conference the the compression wasn't the wasn't a bottleneck this year it's going to be when you're dealing with 290 presentations as opposed to 115 and 250 to 300 hours so what we've come up with were we were putting together a dual g5 network so that what should should significantly reduce the compress sometimes for the speaker permission forms we've actually come up with an online speaker data management system so now speakers don't have to fax anything in its all they're given they're sent an email with it with the password and username and authorization that basically a digital signature and they can do everything online they can give us key words they can give us their speaker profile or their picture and their permission so it's a great system that we've developed well we're in the process of coming up with a way of automating automating the chapter list so we can significantly reduce the amount of time it took to create all the chapter lists and then finally where we picked a new DVD manufacturer that'll turn it around in ten days as opposed to almost six weeks it's a little bit about quality control the video quality and the compression that we achieved here would do because we use the best quality that we have best quality audio feeds and video feeds if you don't get if you think you're going to be able to fix it in post production you're wrong it's just going to take too long sixty two hours is too much video to go through so you really want the best quality audio and video you also don't want to do a lot of editing you only want to do in and out points basically when the presentations start and when it finished you're going to do other editing it's going to you're going to run into a that's another huge bottleneck and then experiment with your compression settings I can I can give you the compression settings for this product but every time we've done a conference or project we always use different settings because whatever is optimized for one conference doesn't necessarily work for another and the reason being is SIGGRAPH everybody was at a podium nobody was allowed to walk around and the background there was no shadows there was no issues like that it was really well lit so we could use a different different setting we just did another project with ATI and we didn't have the same kind of controls so we had to use completely different compression settings to still get a good quality good quality video so to summarize ATM SIGGRAPH 2003 was a big success we worked within a cm cigarettes framework we created workflows that did actually produce the project by by October it was really well received by the computer graphics community and it did really well in sales so for 2004 this year is going to be a five disc DVD ROM as opposed to a two disc there will be an online streaming application but we're moving from two rooms to ten rooms and it's going to go up to about 250 to 300 hours of video so these are the improvements for 2004 where we're recording the whole conference we're including all the live demos so we're doing the demos a completely different way this year we've got the online speaker data management system already it's working right now because the conference is in August we're adding a search engine to our product and we're developing a new method for creating chapter lists and this will inevitably improve the synchronisation of the slides and the video so to conclude I've gone through our knowledge dissemination solution for SIGGRAPH I've talked to you about optimizing high quality audio and video creating the intuitive interface I've talked about a large presentation window that we used instead of a smaller one the chapter lists that we use at four SIGGRAPH and now that we're working with two thousand four or we're doing this we're adding a search engine so our approach I'll emphasizes is designed to serve an audience who is interested in detailed and in-depth information retrieval this means academics researchers and developers Alicia [Applause] so there's some contact information for you there on the screen if you're interested to talk to these guys after the conference but I'd also like to take the opportunity to let you ask some questions if you have them please come up to there's mics in the middle here and on the side if you have some questions for these guys and I'll ask gudren to come back up on the stage