Audio priming-handling encoder delay in AAC

Overview

This section describes temporal positioning of a source audio signal after AAC encoding into a sound track for QuickTime media files. The mechanisms described here are specified in ISO MPEG-4 standards (ISO/IEC 14496-12, 2008) and are used here with additional constraints.

Topics

Handling encoder delay

• AAC encoding background
• The timing and synchronization problem
• Historical solution for implicit encoder delay
• Using track structures to represent encoder delay explicitly
• Representing encoder delay explicitly
• Representing encoder delay with track structures

See Also

Storing audio data

• Sound sample descriptions
• Sound sample description extensions
• Sound sample data