发明名称 |
AUDIO ENCODING DEVICE, AUDIO ENCODING METHOD, AND PROGRAM THEREOF |
摘要 |
[PROBLEMS] To provide a high-quality audio signal encoding technique by controlling the number of time/frequency groups in a frame. [MEANS FOR SOLVING PROBLEMS] An audio encoding device includes: a time group boundary candidate position extraction unit (101) for analyzing a sub-band signal (2001) obtained by frequency-changing an input signal and calculating a candidate position of the time group boundary; a time group quantity generation unit (103) for outputting a maximum value of the time group quantity; a time group selection unit (102) for generating a time group quantity not greater than the maximum time group quantity by using the candidate position; and a frequency group generation unit (104) for generating a frequency group by using the generated time group information. The device generates a time/frequency group accurately reflecting a change of the input signal and performs operations while controlling the number of time/frequency groups in the frame. |
申请公布号 |
WO2008004649(A1) |
申请公布日期 |
2008.01.10 |
申请号 |
WO2007JP63537 |
申请日期 |
2007.07.06 |
申请人 |
NEC CORPORATION;SHIMADA, OSAMU |
发明人 |
SHIMADA, OSAMU |
分类号 |
G10L19/02 |
主分类号 |
G10L19/02 |
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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