发明名称 |
ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD AND DECODING METHOD |
摘要 |
Disclosed is an encoding device capable of improving decoded signal quality. A local search unit (302) conducts a local search on a plurality of sub-bands generated by dividing spectrum data, and calculates lattice vectors for the spectra in the plurality of sub-bands. A multi-rate indexing unit (303) uses the lattice vectors to perform multi-rate indexing on each of the sub-bands, and generates indexing information showing the results thereof. A band selection unit (304) determines certain sub-bands from amongst the plurality of sub-bands in a plurality of encoding layers as perceptually important sub-band groups, where these are: within a selection range of sub-bands wherein the total number of encoding bits allocated to each of the plurality of sub-bands in the indexing information is equal to or less than an already set value, and within a sub-band selection range with the highest total energy of each of the plurality of sub-bands.
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申请公布号 |
US2013035943(A1) |
申请公布日期 |
2013.02.07 |
申请号 |
US201113641493 |
申请日期 |
2011.04.01 |
申请人 |
PANASONIC CORPORATION;YAMANASHI TOMOFUMI;OSHIKIRI MASAHIRO |
发明人 |
YAMANASHI TOMOFUMI;OSHIKIRI MASAHIRO |
分类号 |
G10L21/00;G10L19/02;G10L19/24 |
主分类号 |
G10L21/00 |
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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