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SOUND SIGNAL BAND COMPANDER AND BAND COMPRESSION TRANSMISSION SYSTEM AND REPRODUCING SYSTEM FOR SOUND SIGNAL
SOUND SIGNAL BAND COMPANDER AND BAND COMPRESSION TRANSMISSION SYSTEM AND REPRODUCING SYSTEM FOR SOUND SIGNAL
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机译:声音信号带压扩器以及声音信号的带压传输系统和再现系统
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摘要
PURPOSE: To provide a sound signal band compander in which signals are processed in an analog waveform state in spite of using system parameter for band compression and band compression transmission is attained through an analog signal transmission system by performing A/D and D/A conversions. ;CONSTITUTION: A line predictive analyzer 103 obtains a prediction coefficient ai from a digital sound signal y(nΔt), an inverse filtering circuit 104 obtains a prediction residual signal x(nΔt) using the coefficient ai, a down sampling circuit 109 decreases the sampling rate to convert it to fundamental signal x'(nΔT), supplies the result to an autoregression system linear predictive synthesizer 110, obtains a narrow band time sequential signal w(nΔT) and transmits it to a receiver side. On the receiver side, the signal w(nΔT) is decoded to a sound signal by reversal processing. Since the signal y(nΔt) and the signal w(nΔT) have the same coefficient ai, spectrum information having the original sound signal y(nΔt) is faithfully transmitted only by sending the output signal w(nΔT) consisting of a narrow band analog waveform.;COPYRIGHT: (C)1995,JPO
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机译:目的:提供一种声音信号频带扩展器,尽管使用系统参数进行频带压缩,但仍以模拟波形状态处理信号,并且通过模拟信号传输系统通过执行A / D和D / A转换来实现频带压缩传输。 ;构成:线路预测分析器103从数字声音信号y(nΔt)获得预测系数ai,逆滤波电路104使用系数a i Sub>获得预测残差信号x(nΔt),下采样电路109降低采样率以将其转换为基本信号x'(nΔT),将结果提供给自回归系统线性预测合成器110,获得窄带时间顺序信号w(nΔT)并将其发送到接收器侧。在接收器侧,通过反转处理将信号w(nΔT)解码为声音信号。由于信号y(nΔt)和信号w(nΔT)具有相同的系数a i Sub>,因此仅通过发送输出信号w(如实地)来传输具有原始声音信号y(nΔt)的频谱信息。 nΔT)由窄带模拟波形组成;版权:(C)1995,JPO
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