发明名称 |
BAND ENHANCEMENT METHOD,BAND ENHANCEMENT APPARATUS,PROGRAM,INTEGRATED CIRCUIT AND AUDIO DECODER APPARATUS |
摘要 |
To provide a bandwidth extension method which allows reduction of computation amount in bandwidth extension and suppression of deterioration of quality in the bandwidth to be extended. In the bandwidth extension method: a low frequency bandwidth signal is transformed into a QMF domain to generate a first low frequency QMF spectrum (S11); pitch-shifted signals are generated by applying different shifting factors on the low frequency bandwidth signal (S12); a high frequency QMF spectrum is generated by time-stretching the pitch-shifted signals in the QMF domain (S13); the high frequency QMF spectrum is modified (S14); and the modified high frequency QMF spectrum is combined with the first low frequency QMF spectrum (S15). |
申请公布号 |
ZA201200919(B) |
申请公布日期 |
2013.07.31 |
申请号 |
ZA20120000919 |
申请日期 |
2012.02.07 |
申请人 |
PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA |
发明人 |
ISHIKAWA TOMOKAZU;ZHOU HUAN;ZHONG HAISHAN;NORIMATSU TAKESHI;CHONG KOK SENG |
分类号 |
G01L;G10L21/02;G10L21/038;G10L21/04 |
主分类号 |
G01L |
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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