| 摘要 |
PCT No. PCT/EP93/01582 Sec. 371 Date Jan. 5, 1995 Sec. 102(e) Date Jan. 5, 1995 PCT Filed Jun. 22, 1993 PCT Pub. No. WO94/01980 PCT Pub. Date Jan. 20, 1994In order to require only a relatively small increase in the data rate when the number of channels of multi-channel digitalized and bit-rate reduced audio signals is increased, the psychoacoustic concealment or masking by at least part of the remaining audio channels or the redundancy of individual audio channels is taken advantage of in each individual audio channel when reducing the bit rate of audio signals having more than two audio channels. Only those parts of the concerned audio channel are transmitted or stored which are not concealed by the audio signals of other audio channels or which are contained in the audio channels for stereophonic reproduction with all types of reproduction available for selection. In addition, the used parts are transmitted or stored with a resolution only big enough for the totality of all audio channels to keep concealed the quantization noise generated during quantization in all types of reproduction available for selection.
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