audio method and encoder for encoding an audio signal, apparatus for transmitting or storing an encoded audio signal based on an input audio signal, method and audio decoder for decoding an encoded audio signal, apparatus for reproducing an audio signal output audio, and, computer program product

摘要

"method and audio encoder for encoding an audio signal, apparatus for transmitting or storing an encoded audio signal based on an input audio signal, method and audio decoder for decoding an encoded audio signal, apparatus for reproducing a signal audio output, and computer program product ". encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding including subband filtering each of the first audio channel and the second audio channel in a bank. modulated filter array to provide a first plurality of subband signals for the first audio channel and a second plurality of subband signals for the second audio channel, downstream sampling each of the subband signals to provide a first plurality of downwardly sampled subband signals and a second plurality of downwardly sampled subband signals, additionally filtering at least one of the downwardly sampled subband signals in an additional filter bank in order to provide a plurality of subband signals, derive spatial parameters from the subband signals and those downstream sampled subband signals that are not They are additionally subband filtered, and derive a single channel audio signal including derived subband signals derived from the first plurality of downstream sampled subband signals and the second plurality of downstream sampled subband signals. Additionally, decoding is provided wherein an encoded audio signal including an encoded single channel audio channel and a spatial parameter set is decoded, decoding the encoded single channel audio channel to obtain a plurality of sampled subband signals. downstream, additionally by filtering at least one of the subband signals sampled downwardly in an additional filter bank to provide a plurality of subband signals, and deriving two audio channels from the spatial parameters, sub-subband signals and those down-sampled subband signals that are not additionally subband filtered.