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    • 23. 发明授权
    • Audio signal processing apparatus
    • 音频信号处理装置
    • US07236933B2
    • 2007-06-26
    • US10721167
    • 2003-11-26
    • Norihiko FuchigamiShoji UenoYoshiaki Tanaka
    • Norihiko FuchigamiShoji UenoYoshiaki Tanaka
    • G10L21/04
    • G10L19/008G10L19/04H04B1/66H04S1/007
    • In an audio signal encoding apparatus, a first audio signal and a second audio signal are added into an addition-result signal. The first audio signal is subtracted from the second audio signal to generate a subtraction-result signal. A first difference signal is generated which represents a difference in the addition-result signal. A second difference signal is generated which represents a difference in the subtraction-result signal. A plurality of first predictors have different prediction characteristics respectively, and are responsive to the first difference signal for generating first different prediction signals for the first difference signal, respectively. A plurality of first subtracters operate for generating first prediction-error signals representing differences between the first difference signal and the first different prediction signals, respectively. A first minimum prediction-error signal representative of a smallest difference is selected from among the first prediction-error signals. A plurality of second predictors have different prediction characteristics respectively, and are responsive to the second difference signal for generating second different prediction signals for the second difference signal, respectively. A plurality of second subtracters operate for generating second prediction-error signals representing differences between the second difference signal and the second different prediction signals, respectively. A second minimum prediction-error signal representative of a smallest difference is selected from among the second prediction-error signals.
    • 在音频信号编码装置中,第一音频信号和第二音频信号被加到相加结果信号中。 从第二音频信号中减去第一音频信号以产生减法结果信号。 产生表示加法结果信号的差的第一差值信号。 生成表示减法结果信号的差的第二差分信号。 多个第一预测器分别具有不同的预测特性,并且响应于第一差分信号分别产生用于第一差分信号的第一不同预测信号。 多个第一减法器用于分别产生表示第一差分信号和第一不同预测信号之间的差异的第一预测误差信号。 从第一预测误差信号中选择表示最小差的第一最小预测误差信号。 多个第二预测器分别具有不同的预测特性,并且响应于第二差分信号分别产生用于第二差分信号的第二不同预测信号。 多个第二减法器用于分别产生表示第二差分信号和第二不同预测信号之间的差异的第二预测误差信号。 从第二预测误差信号中选择代表最小差的第二最小预测误差信号。
    • 25. 发明授权
    • Audio signal processing apparatus
    • US07092876B2
    • 2006-08-15
    • US10721161
    • 2003-11-26
    • Norihiko FuchigamiShoji UenoYoshiaki Tanaka
    • Norihiko FuchigamiShoji UenoYoshiaki Tanaka
    • G10L19/06
    • G10L19/008G10L19/04H04B1/66H04S1/007
    • In an audio signal encoding apparatus, a first audio signal and a second audio signal are added into an addition-result signal. The first audio signal is subtracted from the second audio signal to generate a subtraction-result signal. A first difference signal is generated which represents a difference in the addition-result signal. A second difference signal is generated which represents a difference in the subtraction-result signal. A plurality of first predictors have different prediction characteristics respectively, and are responsive to the first difference signal for generating first different prediction signals for the first difference signal, respectively. A plurality of first subtracters operate for generating first prediction-error signals representing differences between the first difference signal and the first different prediction signals, respectively. A first minimum prediction-error signal representative of a smallest difference is selected from among the first prediction-error signals. A plurality of second predictors have different prediction characteristics respectively, and are responsive to the second difference signal for generating second different prediction signals for the second difference signal, respectively. A plurality of second subtracters operate for generating second prediction-error signals representing differences between the second difference signal and the second different prediction signals, respectively. A second minimum prediction-error signal representative of a smallest difference is selected from among the second prediction-error signals.