Compression method and apparatus, transmission method, compressed multi-channel voice signal extension method and apparatus, and recording medium for compressed multi-channel voice signal (method, channel sound signals, and recording medium for compressed multi-channel sound signals)

摘要

A multi-channel signal compressor device that compresses digital speech signals on each channel of a multi-channel audio system includes a first stage compression system and a second stage compression system. In the first stage compression system, a combining means is implemented between the digital voice signals of at least two channels to generate a combined-processed signal for each channel. The compressor circuit receives the three coupled-processed signals in the combining circuit, frequency divides each combined-processed signal into respective frequency-domain signals, compresses the frequency-domain signals obtained by dividing the combined-And generates a compressed signal. In the second stage compression system, the decision circuit receives a first stage compressed signal for each channel from the first stage compression system, receives a first stage compressed signal for each channel, and outputs a first stage compressed The energy for each channel is determined from the signal. The channel bit allocation decision circuit operates in response to the decision circuit, distributes a predetermined number of bits to the channel, and distributes the number of bits to each channel. Finally, the additional compressor compresses the first stage compressed signal of each channel using the number of bits distributed to each channel by the channel bit allocation decision circuit in each channel.