发明名称 |
Low bit-rate audio encoding |
摘要 |
In a sinusoidal audio encoder a number of sinusoids are estimated per audio segment. A sinusoid is represented by frequency, amplitude and phase. The invention uses a track dependent quantization of phase. A track is encoded with a suitable initial (e.g. frequency dependent) quantization grid that is chosen among a set of possible initial grids that may vary from fine to coarse. If, in a series of time segments the frequency variation in a particular track is smaller than a predetermined value, the track is quantized using a finer quantization grid. The invention gives a significant improvement in decoded signal quality, especially for low bit-rate quantizers.
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申请公布号 |
US7596490(B2) |
申请公布日期 |
2009.09.29 |
申请号 |
US20060570289 |
申请日期 |
2006.02.28 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
HOTHO GERARD HERMAN;GERRITS ANDREAS JOHANNES |
分类号 |
G10L19/00;G10L19/08;G10L19/093 |
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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