HK1069472B - 用於语音信号有效编码的信号修改方法 - Google Patents

用於语音信号有效编码的信号修改方法 Download PDF

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Publication number
HK1069472B
HK1069472B HK05101816.5A HK05101816A HK1069472B HK 1069472 B HK1069472 B HK 1069472B HK 05101816 A HK05101816 A HK 05101816A HK 1069472 B HK1069472 B HK 1069472B
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HK
Hong Kong
Prior art keywords
signal
frame
pitch
speech signal
speech
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Application number
HK05101816.5A
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German (de)
English (en)
French (fr)
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HK1069472A1 (zh
Inventor
Mikko Tammi
Milan Jelinek
Claude Laflamme
Vesa Ruoppila
Original Assignee
Nokia Corporation
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Publication date
Priority claimed from CA002365203A external-priority patent/CA2365203A1/en
Application filed by Nokia Corporation filed Critical Nokia Corporation
Publication of HK1069472A1 publication Critical patent/HK1069472A1/zh
Publication of HK1069472B publication Critical patent/HK1069472B/zh

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Abstract

为了在使用信号修改以数字编码声音信号的技术中确定表征长期预测的长期预测延迟参数，将声音信号划分为一系列连续帧，声音信号的特征位于先前帧中，声音信号的相应特征位于当前帧中，并且在利用长期预测进行映射的同时确定当前帧的长期预测延迟参数，前一帧的信号特征与当前帧的相应信号特征。在一种用于实现为数字编码声音信号的技术的信号修改方法中，将声音信号划分成一系列连续帧，将声音信号的每个帧划分成多个信号段，并且在将经弯曲的信号段约束在帧内的同时，使帧的信号段的至少一部分弯曲。为了搜寻声音信号中的音调脉冲，藉由线性预测分析滤波器过滤声音信号而产生残余信号，通过加权滤波器处理声音信号来产生加权声音信号，加权声音信号表示信号周期性，通过加权滤波器对在声音信号的先前帧的最后子帧期间产生的合成语音信号进行滤波来产生合成加权声音信号，根据残留信号来定位先前帧的声音信号的最后音调脉冲，使用合成加权声音信号在先前帧的声音信号的最后音调脉冲的位置周围提取给定长度的音调脉冲原型，且使用音调脉冲原型将音调脉冲定位在当前帧中。
HK05101816.5A 2001-12-14 2002-12-13 用於语音信号有效编码的信号修改方法 HK1069472B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA002365203A CA2365203A1 (en) 2001-12-14 2001-12-14 A signal modification method for efficient coding of speech signals
CA2,365,203 2001-12-14
PCT/CA2002/001948 WO2003052744A2 (en) 2001-12-14 2002-12-13 Signal modification method for efficient coding of speech signals

Publications (2)

Publication Number Publication Date
HK1069472A1 HK1069472A1 (zh) 2005-05-20
HK1069472B true HK1069472B (zh) 2007-09-21

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