Method and arrangement for a decoder for multi-channel surround sound
A multi-channel, channel technology, used in instruments, speech analysis, stereo systems, etc., can solve problems such as excessive amplification and channel cancellation, and achieve the effect of improving quality, reducing complexity and reducing complexity
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[0054]The basic concept of the invention is to obtain a partially known spatial covariance of a multi-channel surround audio signal based on the received spatial parameters and extrapolate the obtained partially known spatial covariance to obtain the complete spatial covariance. Then, according to a fidelity criterion, a predetermined arbitrary linear combination of the multi-channel surround audio signal is estimated based at least on the extrapolated full spatial covariance, the received decoded downmix signal m and the description H of the predetermined arbitrary linear combination, A predetermined linear combination of multi-channel surround audio signals can be synthesized based on said estimates. A predetermined arbitrary linear combination of multi-channel surround audio signals can conceptually represent filtering of multi-channel signals, such as head-related filtering and stereo reproduction. It can also represent other sound effects, such as reverb.
[0055] Accord...
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