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    • 6. 发明授权
    • Audio signal reproducing apparatus
    • 音频信号再现装置
    • US5402277A
    • 1995-03-28
    • US57102
    • 1993-05-03
    • Kenichi NagasawaTaizou HoriShinichi Hatae
    • Kenichi NagasawaTaizou HoriShinichi Hatae
    • G11B27/36H04N7/06H04N9/802H04N9/835G11B5/62
    • H04N9/8355G11B27/36H04N7/06H04N9/802G11B2220/90
    • An apparatus for reproducing from a recording medium a frequency-modulated audio signal which has its carrier level in a specific period determined according to the kind of information and for producing the audio signal after processing the reproduced audio signal is arranged to control the signal processing action according to the output of a detecting circuit which detects the level of a difference between the carrier level of the frequency-modulated audio signal obtained in the specific period and the carrier level obtained in a period other than the specific period or detects changes taking place in the carrier level. This arrangement enables the apparatus to process the audio signal appositely to the kind of the frequency-modulated signal thereof without recourse to any additional reproducing circuit solely for this purpose. Further, the apparatus is arranged to prevent any faulty signal processing action by nullifying as necessary the output of the detecting circuit.
    • 一种用于从记录介质再现根据信息种类确定的特定周期中的载波电平并且在处理再现的音频信号之后产生音频信号的调频音频信号被布置成控制信号处理动作 根据检测电路的输出,该检测电路检测在特定时段中获得的调频音频信号的载波电平与在特定时段之外的时段中获得的载波电平之间的差异的电平,或者检测在特定时段内发生的变化 载体级别。 这种布置使得该装置能够将音频信号与其频率调制信号的种类相反地处理,而无需为此目的而不用任何额外的再现电路。 此外,该装置被布置为通过根据需要消除检测电路的输出来防止任何错误的信号处理动作。
    • 8. 发明授权
    • Audio signal reproducing apparatus
    • 音频信号再现装置
    • US5233484A
    • 1993-08-03
    • US884809
    • 1992-05-19
    • Kenichi NagasawaTaizou HoriShinichi Hatae
    • Kenichi NagasawaTaizou HoriShinichi Hatae
    • G11B27/36H04N7/06H04N9/802H04N9/835
    • H04N9/8355G11B27/36H04N7/06H04N9/802G11B2220/90
    • An apparatus for reproducing from a recording medium a frequency-modulated audio signal which has its carrier level in a specific period determined according to the kind of information and for producing the audio signal after processing the reproduced audio signal is arranged to control the signal processing action according to the output of a detecting circuit which detects the level of a difference between the carrier level of the frequency-modulated audio signal obtained in the specific period and the carrier level obtained in a period other than the specific period or detects changes taking place in the carrier level. This arrangement enables the apparatus to process the audio signal appositely to the kind of the frequency-modulated signal thereof without recourse to any additional reproducing circuit solely for this purpose. Further, the apparatus is arranged to prevent any faulty signal processing action by nullifying as necessary the output of the detecting circuit.
    • 一种用于从记录介质再现根据信息种类确定的特定周期中的载波电平并且在处理再现的音频信号之后产生音频信号的调频音频信号被布置成控制信号处理动作 根据检测电路的输出,该检测电路检测在特定时段中获得的调频音频信号的载波电平与在特定时段之外的时段中获得的载波电平之间的差异的电平,或者检测在特定时段内发生的变化 载体级别。 这种布置使得该装置能够将音频信号与其频率调制信号的种类相反地处理,而无需为此目的而不用任何额外的再现电路。 此外,该装置被布置为通过根据需要消除检测电路的输出来防止任何错误的信号处理动作。