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MODEL BASED PREDICTION IN A CRITICALLY SAMPLED FILTERBANK

机译:基于模型的批判式滤波器中的预测

摘要

The present document relates to audio source coding systems. In particular, the present document relates to audio source coding systems which make use of linear prediction in combination with a filterbank. A method for estimating a first sample (615) of a first subband signal in a first subband of an audio signal is described. The first subband signal of the audio signal is determined using an analysis filterbank (612) comprising a plurality of analysis filters which provide a plurality of subband signals in a plurality of subbands from the audio signal, respectively. The method comprises determining a model parameter (613) of a signal model; determining a prediction coefficient to be applied to a previous sample (614) of a first decoded subband signals derived from the first subband signal, based on the signal model, based on the model parameter (613) and based on the analysis filterbank (612); wherein a time slot of the previous sample (614) is prior to a time slot of the first sample (615); and determining an estimate of the first sample (615) by applying the prediction coefficient to the previous sample (614).
机译:本文档涉及音频源编码系统。特别地,本文涉及使用与滤波器组合使用的线性预测的音频源编码系统。描述了一种用于估计音频信号的第一子带中的第一子带信号的第一样本(615)的方法。使用分析滤波器组(612)确定音频信号的第一子带信号,包括多个分析滤波器,该分析过滤器分别在来自音频信号的多个子带中提供多个子带信号。该方法包括确定信号模型的模型参数(613);基于模型参数(613),确定要应用于从第一子带信号导出的第一解码子带信号的先前样本(614)的预测系数,并基于分析滤波器堆(612) ;其中先前样本(614)的时隙是在第一样品的时隙(615)之前;通过将预测系数施加到先前的样本(614)来确定第一样品(615)的估计。

著录项

  • 公开/公告号EP3648104B1

    专利类型

  • 公开/公告日2021-05-19

    原文格式PDF

  • 申请/专利权人

    申请/专利号EP20190208681

  • 发明设计人 VILLEMOES LARS;

    申请日2014-01-07

  • 分类号G10L19/093;G06F30/327;

  • 国家 EP

  • 入库时间 2022-08-24 18:44:36

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