Method and apparatus for encoding-decoding a digital signal

Details Method and apparatus for encoding-decoding a digital signal Method and apparatus for encoding-decoding a digital signal

H - Electricity

03

M

H03M 7/02 (2006.01) G06F 17/14 (2006.01) H03M 7/30 (2006.01)

Patent

CA 2066471

36 The invention relates to a method and to apparatus for encoding-decoding a digital signal comprising a sequence of samples x(n). After a windowing operation h(n) performed by space-time weighting of the samples, the method and the apparatus consists in performing or enabling to be performed a modified discrete cosine transform of the samples to calculate the even order transformation coefficients: Image The coefficient Y2k are expressed in the form of an invertible complex transformation: Image The invertible complex transformation is calculated using an auxiliary calculation equation: Image The invention is applicable to encoding and decoding digital audio or video signals.

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