MDCT base complex prediction stereo coding

Title:

MDCT base complex prediction stereo coding

Document Type and Number:

Japanese Patent JP6197011

Kind Code:

B2

Abstract:

The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of:(i) computing a second frequency-domain representation of a first input channel; and(ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The method comprises performing frequency-domain modifications selectively before or after upmixing.

Inventors:

Prunhagen, Heiko
Carlsson, pontus
Willemoes, Lars

Application Number:

JP2015184492A

Publication Date:

September 13, 2017

Filing Date:

September 17, 2015

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