发明申请
US20130035943A1 ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD AND DECODING METHOD
有权
编码设备,解码设备,编码方法和解码方法
- 专利标题: ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD AND DECODING METHOD
- 专利标题(中): 编码设备,解码设备,编码方法和解码方法
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申请号: US13641493申请日: 2011-04-01
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公开(公告)号: US20130035943A1公开(公告)日: 2013-02-07
- 发明人: Tomofumi Yamanashi , Masahiro Oshikiri
- 申请人: Tomofumi Yamanashi , Masahiro Oshikiri
- 申请人地址: JP Osaka
- 专利权人: PANASONIC CORPORATION
- 当前专利权人: PANASONIC CORPORATION
- 当前专利权人地址: JP Osaka
- 优先权: JP2010-096095 20100419
- 国际申请: PCT/JP2011/001986 WO 20110401
- 主分类号: G10L21/00
- IPC分类号: G10L21/00
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.