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11. 发明授权

US5923767A Digital audio processing 失效
标题翻译：数字音频处理
公开(公告)号：US5923767A
公开(公告)日：1999-07-13
申请号：US801355
申请日：1997-02-19
申请人： Paul Anthony Frindle , Peter Charles Eastty
发明人： Paul Anthony Frindle , Peter Charles Eastty
IPC分类号： G10L21/02 , H03G7/00 , H03M7/50
CPC分类号： H03G7/007
摘要： Digital audio processing apparatus comprises: device for detecting the magnitude of an input digital audio signal; and a variable gain element for applying a gain to the input digital audio signal dependent on the detected magnitude of the input digital audio signal, in which:(i) the applied gain is linearly related to the envelope signal with a first predetermined slope, for detected magnitudes below a first threshold magnitude;(ii) the applied gain is linearly related to the envelope signal with a second predetermined slope, for detected magnitudes above a second threshold magnitude higher than the first threshold magnitude; and(iii) for detected magnitudes from the first threshold magnitude to the second threshold magnitude, the slope of the applied gain with respect to detected magnitude varies monotonically from the first predetermined slope to the second predetermined slope.
摘要翻译：数字音频处理装置包括：用于检测输入数字音频信号的大小的装置; 以及可变增益元件，用于根据检测到的输入数字音频信号的幅度将增益应用于输入数字音频信号，其中：（i）所施加的增益与具有第一预定斜率的包络信号线性相关，用于检测到的幅度低于第一阈值幅度; （ii）所施加的增益与具有第二预定斜率的包络信号线性相关，用于高于高于第一阈值幅度的第二阈值幅度的检测幅度; 和（iii）对于从第一阈值幅度到第二阈值幅度的检测幅度，施加的增益相对于检测到的幅度的斜率从第一预定斜率到第二预定斜率单调变化。

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