首页> 外国专利> PERCEPTUAL NOISE SHAPING IN THE TIME DOMAIN VIA LPC PREDICTION IN THE FREQUENCY DOMAIN

PERCEPTUAL NOISE SHAPING IN THE TIME DOMAIN VIA LPC PREDICTION IN THE FREQUENCY DOMAIN

机译:通过频率域中的LPC预测来感知时域中的感知噪声

摘要

A method and apparatus for the perceptual coding of audio signals in whichperceptual noise shaping is achieved in the time domain by performing a (linear) prediction(i.e., filtering) in the frequency domain. As a result, the temporal spread of quantizationnoise is reduced. Specifically, according to one illustrative embodiment of the presentinvention, a method comprises decomposition of the audio signal into a plurality of spectralcomponent signals; generating a prediction signal representative of a prediction of one ofsaid spectral component signals, said prediction based on one or more other ones of saidspectral component signals; comparing the prediction signal with said one of said spectralcomponent signals to generate a prediction error signal; coding said one of said spectralcomponent signals based on the prediction error signal to generate a coded spectralcomponent signal; and generating the encoded signal based on the coded spectralcomponent signal.
机译:一种用于音频信号的感知编码的方法和设备,其中通过执行(线性)预测,可以在时域中实现感知噪声整形(即过滤)在频域中。结果,量化的时间扩散降低噪音。具体地,根据本发明的一个说明性实施方式本发明的方法包括将音频信号分解成多个频谱分量信号;生成表示以下项之一的预测的预测信号:所述频谱分量信号,所述预测基于所述一个或多个其他频谱分量信号;将预测信号与所述频谱之一进行比较分量信号产生预测误差信号;编码所述频谱之一分量信号基于预测误差信号生成编码频谱分量信号并基于编码频谱生成编码信号分量信号。

著录项

  • 公开/公告号CA2194419C

    专利类型

  • 公开/公告日2001-05-01

    原文格式PDF

  • 申请/专利权人 AT&T CORP.;

    申请/专利号CA19972194419

  • 发明设计人 HERRE JUERGEN HEINRICH;

    申请日1997-01-06

  • 分类号G10L9/14;

  • 国家 CA

  • 入库时间 2022-08-22 01:22:03

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