Patent Number: 7,280,960

Title: Sub-band voice codec with multi-stage codebooks and redundant coding

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.

Inventors: Wang; Tian (Redmond, WA), Koishida; Kazuhito (Redmond, WA), Khalil; Hosam A. (Redmond, WA), Sun; Xiaoqin (Redmond, WA), Chen; Wei-Ge (Issaquah, WA)

Assignee: Microsoft Corporation

International Classification: G10L 21/00 (20060101)

Expiration Date: 2019-10-09 0:00:00