Method and apparatus for coding audio signals based on...

Details Method and apparatus for coding audio signals based on... Method and apparatus for coding audio signals based on...

H - Electricity

04

S

H04S 1/00 (2006.01) H03M 7/00 (2006.01) H04B 1/66 (2006.01) H04H 5/00 (2006.01)

Patent

CA 2090159

Coding of high quality stereophonic audio signals is accomplished in a perceptual filterbank coder which exploits the interchannel redundancies and psychoacoustic. Using perceptual principles, switching between a normal and short window of input samples improve output signal quality for certain input signals,particularly those having a rapid attack. Switching is also accomplished betweencoding of left and right channels and so- called sum and difference channels in response to particular signal conditions. A number of new perceptually based techniques, including improved threshold determinations, result in high quality.

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