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Burst-excited linear prediction

机译:突发激发线性预测

摘要

A novel and improved apparatus for encoding a signal which is bursty in nature. In a code excited linear prediction algorithm, short term redundancies and long term redundancies are removed from digitally sampled speech, and the residual signal which is bursty in nature must be encoded. The residual signal is encoded using three parameters a burst shape index corresponding to a burst shape in a codebook of burst shapes, a burst gain, and a burst location. Together the three parameters specify a waveform to match the residual signal. Further disclosed is a closed loop exhaustive search method by which to find the best match to the residual waveform and a partially open loop method wherein the burst location is determined by an open loop analysis of the residual waveform, and the burst shape and gain parameters are determined in a closed loop fashion. Also disclosed are methods by which a burst vector codebook may be provided which may result in reduced computational complexity in the search algorithms including a recursive burst codebook and a codebook structured in such a way that members of the codebook are linear combinations of other members of the codebook.
机译:一种新颖且改进的设备,用于编码本质上为突发性的信号。在代码激励线性预测算法中,从数字采样语音中去除了短期冗余和长期冗余,并且必须对本质上突发的残余信号进行编码。使用三个参数对突发信号进行编码,所述三个参数是与突发形状的码本中的突发形状相对应的突发形状索引,突发增益和突发位置。这三个参数共同指定了一个波形,以匹配残余信号。进一步公开了一种闭环穷举搜索方法和部分开环方法,通过该方法找到与残留波形的最佳匹配,其中部分脉冲串的位置是通过对残留波形的开环分析来确定的,脉冲串的形状和增益参数为以闭环方式确定。还公开了可以通过其提供突发矢量码本的方法,其可以导致搜索算法中的计算复杂度降低,所述算法包括递归突发码本和以这样的方式构造的码本,即,码本的成员是其其他成员的线性组合。码本。

著录项

  • 公开/公告号DK0744069T3

    专利类型

  • 公开/公告日2002-10-07

    原文格式PDF

  • 申请/专利权人 QUALCOMM INCORPORATED;

    申请/专利号DK19950909433T

  • 发明设计人 GARDNER WILLIAM R.;

    申请日1995-02-01

  • 分类号G10L19/12;G10L5/06;G10L7/08;G10L9/06;G10L9/14;

  • 国家 DK

  • 入库时间 2022-08-22 00:45:40

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