Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion
Reexamination Certificate
2006-01-20
2010-11-09
Wozniak, James S (Department: 2626)
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
C704S501000, C381S021000, C381S023000
Reexamination Certificate
active
07831434
ABSTRACT:
An audio encoder receives multi-channel audio data comprising a group of plural source channels and performs channel extension coding, which comprises encoding a combined channel for the group and determining plural parameters for representing individual source channels of the group as modified versions of the encoded combined channel. The encoder also performs frequency extension coding. The frequency extension coding can comprise, for example, partitioning frequency bands in the multi-channel audio data into a baseband group and an extended band group, and coding audio coefficients in the extended band group based on audio coefficients in the baseband group. The encoder also can perform other kinds of transforms. An audio decoder performs corresponding decoding and/or additional processing tasks, such as a forward complex transform.
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“Smart Project—Algebraic Theorgy of Signal Processing,
Chen Wei-Ge
Mehrotra Sanjeev
Klarquist & Sparkman, LLP
Microsoft Corporation
Wozniak James S
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