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SPECTRUM ENCODING DEVICE, SPECTRUM DECODING DEVICE, ACOUSTIC SIGNAL TRANSMITTING DEVICE, ACOUSTIC SIGNAL RECEIVING DEVICE, AND METHOD THEREOF
SPECTRUM ENCODING DEVICE, SPECTRUM DECODING DEVICE, ACOUSTIC SIGNAL TRANSMITTING DEVICE, ACOUSTIC SIGNAL RECEIVING DEVICE, AND METHOD THEREOF
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机译:频谱编码设备,频谱解码设备,声信号发送设备,声信号接收设备及其方法
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摘要
A spectrum coding apparatus capable of performing coding at a lowbit rate and with high quality is disclosed. This apparatus is provided with a section that performs the frequency transformation of a first signal and calculates a first spectrum, a section that converts the frequency of a second signal and calculates a second spectrum, a section that estimates the shape of the second spectrum in a band of FL‰¦kFH using a filter having the first spectrum in a band of 0‰¦kFL as an internal state and a section that codes an outline of the second spectrum determined based on a coefficient indicating the characteristic of the filter at this time.
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