CN1138254C - 一种基于小波变换的音频信号压缩编/解码方法 - Google Patents
一种基于小波变换的音频信号压缩编/解码方法 Download PDFInfo
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- CN1138254C CN1138254C CNB011096861A CN01109686A CN1138254C CN 1138254 C CN1138254 C CN 1138254C CN B011096861 A CNB011096861 A CN B011096861A CN 01109686 A CN01109686 A CN 01109686A CN 1138254 C CN1138254 C CN 1138254C
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for(ii=0;ii<子带数;ii++) { samplept=sample+帧长-1;//指向数据帧的末尾 for(inti=0;i<样本序列长度;i++) { ConvResult=0; for(intj=0;j<该子带中的样本数;j++) { //计算该次计算所对应的滤波器和输入样本序列的起始运算位置 //gap为该子带样本间的0插值数。 kBegin=((i-j*gap+0x7F)&0xFFFFFF80); for(int k=kBegin;k<=子带滤波器长度;k+=帧长) ConvResult+=样本序列[k]*子带滤波器[k]; } (*samplept--)+=ConvResult; } }//End ii loop
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CN1138254C true CN1138254C (zh) | 2004-02-11 |
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Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN100454765C (zh) * | 2006-03-14 | 2009-01-21 | 安凯(广州)软件技术有限公司 | 一种提高音频解码器解码精度的方法 |
CN101771399B (zh) * | 2010-03-22 | 2012-10-17 | 上海辛克试验机有限公司 | 一种基于单片机的mdac窄带跟踪滤波器及其实现方法 |
US9571931B1 (en) * | 2013-04-09 | 2017-02-14 | Cirrus Logic, Inc. | Systems and methods for reducing non-linearities of a microphone signal |
EP3162086B1 (en) * | 2014-06-27 | 2021-04-07 | Dolby International AB | Apparatus for determining for the compression of an hoa data frame representation a lowest integer number of bits required for representing non-differential gain values |
EP3489953B8 (en) * | 2014-06-27 | 2022-06-15 | Dolby International AB | Determining a lowest integer number of bits required for representing non-differential gain values for the compression of an hoa data frame representation |
CN107230998A (zh) * | 2017-06-09 | 2017-10-03 | 东华大学 | 降低功率波动频率及区间最大变化率风电场功率平滑方法 |
CN112133317B (zh) * | 2020-09-21 | 2021-08-10 | 易兆微电子(杭州)股份有限公司 | 一种基于sbc的低传输比特率高质量语音编解码方法 |
CN113129911A (zh) * | 2021-03-19 | 2021-07-16 | 江门市华恩电子研究院有限公司 | 一种音频信号编码压缩和传输的方法及电子设备 |
CN116778936A (zh) * | 2023-08-17 | 2023-09-19 | 建朗电子(深圳)有限公司 | 一种基于混沌映射与人耳模型的音频压缩与恢复方法 |
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