公开(公告)号：US5832442A

公开(公告)日：1998-11-03

申请号：US493970

申请日：1995-06-23

申请人： Gang-Janp Lin ,  Sau-Gee Chen ,  Der-Chwan Wu ,  Yuan-An Kao ,  Yen-Hui Wang

发明人： Gang-Janp Lin ,  Sau-Gee Chen ,  Der-Chwan Wu ,  Yuan-An Kao ,  Yen-Hui Wang

IPC分类号： G10H7/00 ,  G01L9/08

CPC分类号： G10H7/008

摘要： A method is disclosed of modification of parameters of audio signals by dividing a digital signal converted from an original analog signal into sound frames, modifying a pitch and a playing rate of the digital signal within a frame and subsequent successive splicing a last modified frame with a first non-modified frame and calculating the mean absolute error to define the best splicing point in terms of producing minimal or no audible noise such that various sections of sound signals can be spliced together to achieve pitch and playing rate modification. An apparatus is also disclosed for implementing the method, the apparatus comprising input and output amplifiers, a low pass filter at the input and a low pass filter at the output, analog-to-digital and digital-to-analog converters, and a pitch shifting processor.

摘要翻译： 公开了一种通过将从原始模拟信号转换成的数字信号分成声音帧来修改音频信号的参数的方法，修改帧内的数字信号的音调和播放速率，并且随后使用 第一非修改帧并计算平均绝对误差，以便在产生最小或不可听到的噪声方面定义最佳拼接点，使得声音信号的各个部分可以拼接在一起以实现音调和播放速率修改。 还公开了一种用于实现该方法的装置，该装置包括输入和输出放大器，输入端的低通滤波器和输出模数转换器和数/模转换器之间的低通滤波器，以及间距 移位处理器