Sub-band voice codec with multi-stage codebooks and...

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

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C704S220000

Reexamination Certificate

active

11197914

ABSTRACT:
Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information associated with only a portion of a previous frame. As another example, redundant coded information for decoding a coded unit includes parameters for a codebook stage to be used in decoding the current coded unit only if the previous coded unit is not available. As yet another example, coded audio units each include a field indicating whether the coded unit includes main encoded information representing a segment of an audio signal, and whether the coded unit includes redundant coded information for use in decoding main encoded information.

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