发明名称 |
ENCODING DEVICE, DECODING DEVICE, AND METHOD THEREOF |
摘要 |
<p>Provided is an encoding device which improves the sound quality of a stereo signal while maintaining a low bit rate. The encoding device includes: an LP inverse filter (121) which LP-inverse-filterS a left signal L(n) by using an inverse quantization linear prediction coefficient AdM(z) of a monaural signal; a T/F conversion unit (122) which converts the left sound source signal Le(n) from a temporal region to a frequency region; an inverse quantizer (123) which inverse-quantizes encoded information Mqe; spectrum division units (124, 125) which divide a high-frequency component of the sound source signal Mde(f) and the left signal Le(f) into a plurality of bands; and scale factor calculation units (126, 127) which calculate scale factors ai and ßi by using a monaural sound source signal Mdeh,i(f), a left sound source signal Leh,i(f), Mdeh,i(f), and right sound source signal Reh,i(f) of each divided band.</p> |
申请公布号 |
WO2009057329(A1) |
申请公布日期 |
2009.05.07 |
申请号 |
WO2008JP03166 |
申请日期 |
2008.11.04 |
申请人 |
PANASONIC CORPORATION;CHONG, KOK SENG;YOSHIDA, KOJI;OSHIKIRI, MASAHIRO |
发明人 |
CHONG, KOK SENG;YOSHIDA, KOJI;OSHIKIRI, MASAHIRO |
分类号 |
G10L19/00;G10L19/008;G10L19/02;G10L19/08;G10L19/14;G10L19/24 |
主分类号 |
G10L19/00 |
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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