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1.发明公开Adaptive differential PCM system with residual-driven adaptation of feedback predictor 失效适应差异化PCM-System mit durch剩余计数器Anpassung desRückkopplungsprädiktors。
公开(公告)号：EP0131817A2
公开(公告)日：1985-01-23
申请号：EP84107530.2
申请日：1984-06-29
IPC分类号： H03M3/04
CPC分类号： H03M3/042
摘要： An adaptive differential pulse code modulation system (ADPCM), with adaptive prediction, has a transmitter (10A), which substracts the output of its predictor (18) from the original input signal and transmits a numeric representation ofthe quantized difference, and a receiver (12A) which reconstructs the original input signal by the reverse process. Mistracking, whereby the receiver fails to faithfully reproduce the original input signal because its predictor coefficients differ from those of the transmitter predictor, which can result from transmission errors when the original signal comprises two pure tones, is avoided by eliminating the dependence of the adaptation process upon the predictor output. This is achieved by deriving the coefficients using the difference signal but not the reconstructed signal at the output of the predictor.
摘要翻译： 具有自适应预测的自适应差分脉码调制系统（ADPCM）具有发射机（10A），其从原始输入信号中减去其预测器（18）的输出，并发送量化差值的数字表示，以及接收机 （12A），其通过反向处理重建原始输入信号。 因为接收机不能忠实地再现原始输入信号，因为它的预测器系数不同于发射机预测器的预测器系数，这可以由原始信号包括两个纯音调的传输错误导致，因此通过消除适配过程的依赖性 根据预测输出。 这是通过使用差分信号导出系数而不是在预测器的输出处的重建信号来实现的。
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2.发明授权Adaptive differential PCM system with residual-driven adaptation of feedback predictor 失效自适应差分PCM系统，具有反馈预测的残留驱动适配
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3.发明公开Adaptive differential PCM system with residual-driven adaptation of feedback predictor 失效自适应差分PCM系统，具有反馈传感器适应性反馈预测
公开(公告)号：EP0131817A3
公开(公告)日：1985-10-23
申请号：EP84107530
申请日：1984-06-29
IPC分类号： H03M03/04
CPC分类号： H03M3/042
摘要： An adaptive differential pulse code modulation system (ADPCM), with adaptive prediction, has a transmitter (10A), which substracts the output of its predictor (18) from the original input signal and transmits a numeric representation ofthe quantized difference, and a receiver (12A) which reconstructs the original input signal by the reverse process. Mistracking, whereby the receiver fails to faithfully reproduce the original input signal because its predictor coefficients differ from those of the transmitter predictor, which can result from transmission errors when the original signal comprises two pure tones, is avoided by eliminating the dependence of the adaptation process upon the predictor output. This is achieved by deriving the coefficients using the difference signal but not the reconstructed signal at the output of the predictor.
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