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Acoustic signal encoding device, acoustic signal decoding device, method for encoding acoustic signal, and method for decoding acoustic signal
Acoustic signal encoding device, acoustic signal decoding device, method for encoding acoustic signal, and method for decoding acoustic signal
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机译:声音信号编码装置,声音信号解码装置,声音信号的编码方法以及声音信号的解码方法
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摘要
An acoustic signal encoding device (100) comprises: a time-frequency convertor (101) for outputting a sub-band spectrum from an input signal; a sub-band energy quantization unit (102); a tonality calculation unit (103) for analyzing the tonal characteristics of the sub-band spectrum; a bit distributor (104) for selecting a second sub-band to be quantized at a second quantization unit and determining a first bit number distributed to a first sub-band to be quantized at a first quantization unit on the basis of the result of analyzing the tonal characteristics and a quantized sub-band energy; the first quantization unit (106) for encoding using bits having the first bit number; the second quantization unit (107) for encoding using a pitch filter; and a multiplexer (108).
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