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Sound signaling coded manner and sound signaling decoding manner, sound signaling coding equipment and sound signaling decoding device
Sound signaling coded manner and sound signaling decoding manner, sound signaling coding equipment and sound signaling decoding device
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机译:声音信令编码方式和声音信令解码方式,声音信令编码设备和声音信令解码设备
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摘要
To efficiently execute compression encoding by dividing a band, executing-encoding, making the digital acoustic signal of frequency area information and obtaining a residual signal between the digital acoustic signal and an original signal and multiplexing the residual signal with the digital acoustic signal. SOLUTION: Signals which are band-dividing to uniform 32 bands by a band dividing filter 1 are supplied to a maximum value selection part 2 and a quantizer 4. The selection part 2 outputs a maximum value S and the maximum value S decides the number of bits in a bit distribution part 3. The quantizer 4 reduces the number of the bits of respective pieces of sub-band data in the signal of the filter 1 based ON bit distribution information from the distribution part 3. Sub-band data adjusted to lowest bit information by an inverse quantizer 5 are supplied to a band dividing filter 6 and are converted into the signals of time area information. A residual calculation part calculates an operation error occurred in band division/synthesis by the filters 1 and 6 and outputs it as the residual signal. A multiplexer 9 generates a bit stream for sub-data from the quantizer 4 and the residual signal from a calculation part 8.
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