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2. 发明授权

US5434926A Automatic sound volume control method 失效
标题翻译：自动音量控制方式
公开(公告)号：US5434926A
公开(公告)日：1995-07-18
申请号：US15108
申请日：1993-02-09
申请人： Yoshikatsu Watanabe , Takashi Miyake , Masatoshi Ito , Yoshio Imanishi
发明人： Yoshikatsu Watanabe , Takashi Miyake , Masatoshi Ito , Yoshio Imanishi
IPC分类号： B60R11/02 , H03G3/32 , H03G5/16 , H03G3/00
CPC分类号： H03G3/32
摘要： An automatic volume control to prevent the listener from having an odd sensation is obtained with a plurality of conditions taken into considerations. A plurality of control rules required to infer using fuzzy logic a volume correcting value on the basis of frequency band component levels, L, M and H and a volume level V are stored beforehand in a volume correcting value inferring portion 13. The volume correcting value inferring portion 13 obtains inference results of the individual control rules on the basis of the individual frequency band component levels L, M, H input from a filter circuit 12 and the volume level input from an audio reproducing portion 14, obtains a weighted mean of the respective inference results as a volume correcting value Z, and inputs the volume correcting value to the audio reproducing portion 14 to automatically correct the volume. Furthermore, since a degree with which each of the control rules is associated with volume correction differs, an adjustment coefficient corresponding to each of the degrees is stored beforehand. A weighted mean of the values obtained by multiplying the inference results of the control rules by the corresponding adjustment coefficients is the volume correcting value.
摘要翻译：在考虑到多个条件的情况下，可以获得防止听众出现奇怪感觉的自动音量控制。根据频带成分水平L，M，H以及音量V来推定使用模糊逻辑的体积校正值所需的多个控制规则被预先存储在体积校正值推定部13中。体积校正值推断部分13基于从滤波器电路12输入的各个频带分量电平L，M，H和从音频再现部分14输入的音量电平获得各个控制规则的推断结果，获得加权平均值相应的推断结果作为音量校正值Z，并且将音量校正值输入到音频再现部分14以自动校正音量。此外，由于每个控制规则与体积校正相关联的程度不同，所以预先存储与每个度数对应的调整系数。通过将控制规则的推断结果乘以相应的调整系数而获得的值的加权平均值是体积校正值。

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