发明名称 |
Analysis-synthesis of audio signal |
摘要 |
The present invention relates to an information extraction apparatus capable of analyzing an acoustic signal with accuracy and high efficiency. <??>An amplitude analysis section 32 determines whether or not an attack or release is contained on the basis of an amplitude value for each small region of an input time-series signal. When it is determined that there is an attack or release, an analysis region setting section 33 sets the portion from an attack position to a release position as an analysis region. A frequency analysis section 34 analyzes the input time-series signal by generalized harmonic analysis and outputs extracted waveform information. An extracted waveform synthesis section 35 synthesizes the extracted waveform information and outputs the information to a time-series compensation section 36. <??>The time-series compensation section 36 compensates the signal of the synthesized result with a signal outside the analysis region and outputs an extracted waveform time-series signal to a subtraction unit 37. The subtraction unit 37 generates a residual time-series signal from the input time-series signal and the extracted waveform time-series signal. The present invention can be applied to various audio apparatuses, voice recognition apparatuses, voice synthesis apparatuses, etc., for processing an acoustic signal. <IMAGE>
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申请公布号 |
EP1343143(A1) |
申请公布日期 |
2003.09.10 |
申请号 |
EP20010270874 |
申请日期 |
2001.12.14 |
申请人 |
SONY CORPORATION |
发明人 |
TSUJI, MINORU;SUZUKI, SHIRO;TOYAMA, KEISUKE |
分类号 |
G10L19/08;G10L19/02;(IPC1-7):G10L11/00;G10L13/00 |
主分类号 |
G10L19/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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