Error resilient windows media audio coding

Details Error resilient windows media audio coding Error resilient windows media audio coding

2007-01-02

2007-01-02

To, Doris H. (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

C370S470000

Reexamination Certificate

active

10125280

ABSTRACT:
A unique sync mark is applied by an encoder to the beginning of each frame in a data packet of a Windows Media™ Audio bitstream by a Microsoft® Windows Media™ Audio (WMA) codec. The WMA decoder handles errors at the frame level for each data packet. When a frame in a data packet of a WMA file is corrupted, the decoder can continue to decode the next frame by searching for the next sync mark at the beginning of the next frame. Accordingly, error propagation is confined to a single frame and the decoder can simultaneously handle bit errors and packet erasures when decompressing a received audio bitstream.

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“A Class of Reversible Variable Length Codes for Rubust Image and Video Coding”, Jiantao Wen and John D. Villasenor, 4 pages.
“Error Resilient Scalable Audio Coding (ERSAC) For Mobile Applications”, Jianpin Zhou, Qian Zhang, Zixang Xiong and wEnwu Zhu, 4 pages.

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