发明名称 |
BANDWIDTH EXTENSION METHOD, BANDWIDTH EXTENSION APPARATUS, PROGRAM, INTEGRATED CIRCUIT, AND AUDIO DECODING APPARATUS |
摘要 |
<p>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).</p> |
申请公布号 |
EP2581905(B1) |
申请公布日期 |
2016.01.06 |
申请号 |
EP20110792129 |
申请日期 |
2011.06.06 |
申请人 |
PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA |
发明人 |
ISHIKAWA, TOMOKAZU;NORIMATSU, TAKESHI;ZHOU, HUAN;CHONG, KOK SENG;ZHONG, HAISHAN |
分类号 |
G10L21/038;G10L21/02;G10L21/04 |
主分类号 |
G10L21/038 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|