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Abstract

A method and device for classifying uncorrelated stereo content in a stereo sound signal including a left channel and a right channel in response to features extracted from the stereo sound signal comprise calculating a score representative of uncorrelated stereo content in the stereo sound signal in response to the extracted features and, in response to the score, switching between a first class indicative of one of uncorrelated and correlated stereo content in the stereo sound signal and a second class indicative of the other of the uncorrelated and correlated stereo content. A method and device for detecting cross-talk in a stereo sound signal including a left channel and a right channel in response to features extracted from the stereo sound signal comprise calculating a score representative of cross-talk in the stereo sound signal in response to the extracted features, calculating auxiliary parameters for use in detecting cross-talk in the stereo sound signal and, in response to the cross-talk score and the auxiliary parameters, switching between a first class indicative of a presence of cross-talk in the stereo sound signal and a second class indicative of an absence of cross-talk in the stereo sound signal. A method and device selecting one of a first stereo mode and a second stereo mode for coding a stereo sound signal including a left channel and a right channel, comprises producing a first output indicative of a presence or absence of uncorrelated stereo content in the stereo sound signal, producing a second output indicative of a presence or absence of cross-talk in the stereo sound signal, calculating auxiliary parameters for use in selecting the stereo mode for coding a stereo sound signal, and selecting the stereo mode for coding a stereo sound signal in response to the first output, the second output and the auxiliary parameters.

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