公开(公告)号：EP3163905A1

公开(公告)日：2017-05-03

申请号：EP16179849

申请日：2016-07-18

申请人： GUOGUANG ELECTRIC COMPANY LTD

发明人： YOU YULI

IPC分类号： H04R3/04 ,  G10L21/013

CPC分类号： H04R3/04 ,  G10H1/08 ,  G10H1/12 ,  G10H2210/321 ,  G10H2250/215 ,  G10L21/013 ,  G10L25/93 ,  H04R2430/01 ,  H04R2499/11

摘要： Provided are, among other things, systems, methods and techniques for processing an audio signal to add virtual bass. In one representative embodiment, an apparatus includes: (a) an input line that inputs an original audio signal in the time domain; (b) a bass extraction filter that extracts a bass portion of the original audio signal, which also is in the time domain; (c) an estimator that estimates a fundamental frequency of a bass sound within the bass portion; (d) a frequency translator that shifts the bass portion by a positive frequency increment that is an integer multiple of the fundamental frequency estimated by the estimator, thereby providing a virtual bass signal; (e) an adder having (i) inputs coupled to the original audio signal and to the virtual bass signal and (ii) an output; and (f) an audio output device coupled to the output of the adder.

摘要翻译： 除其他之外，提供了用于处理音频信号以添加虚拟低音的系统，方法和技术。 在一个代表性实施例中，一种装置包括：（a）在时域中输入原始音频信号的输入线; （b）低音提取滤波器，其提取也在时域中的原始音频信号的低音部分; （c）估计低音部分内的低音声音的基频的估计器; （d）频率变换器，其将低音部分移动正频率增量，所述正频率增量是由估计器估计的基频的整数倍，由此提供虚拟低音信号; （e）加法器，其具有（i）耦合到原始音频信号和虚拟低音信号的输入和（ii）输出; 和（f）耦合到加法器输出端的音频输出装置。