Method and apparatus for encoding and decoding multi-channel...

Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic

Reexamination Certificate

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C381S017000, C381S018000, C381S022000, C704S501000

Reexamination Certificate

active

07933416

ABSTRACT:
A method of encoding multi-channel signals having two or more channels into a first signal and a second signal, and an apparatus to perform the method, the method including generating the first signal by performing a first operation using a first channel signal in the multi-channel signals; and generating the second signal by performing a second operation using a combination of the first channel signal and a second channel signal in the multi-channel signals.

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Johnston et al., “Sum-Difference Stereo Transform Coding”, XP000357067, AT&T Bell Laboratories; Mar. 23, 1992, pp. 569-572 (4 pgs) (in English).
European Search Report for corresponding European Patent Application No. EP06250119 dated Dec. 28, 2007 (5 pgs) (in English).

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