Method and apparatus for coding information
The invention provides a method and apparatus for coding information that is specifically adapted for smaller presentation formats, such as in a hand held video player. The invention addresses, inter alia, reducing the complexity of video decoding, implementation of an MP3 decoder using fixed point arithmetic, fast YcbCr to RGB conversion, encapsulation of a video stream and an MP3 audio stream into an AVI file, storing menu navigation and DVD subpicture information on a memory card, synchronization of audio and video streams, encryption of keys that are used for decryption of multimedia data, and very user interface (UI) adaptations for a hand held video player that implements the improved coding invention herein disclosed.
1 . A method for compressing b-frames in an AVI file, comprising the steps of:
storing several video frames in one chunk; and inserting large amounts of empty (zero length) video chunks into an AV stream to isolate audio chunks,
2 . The method of claim 1 , further comprising the step of:
applying a post-processing utility to an AVI file that isolates each video frame in its own chunk and drops all empty chunks.