发明名称 |
Low power downmix energy equalization in parametric stereo encoders |
摘要 |
A method and audio device are presented that preserve mono energy during downmixing of a hybrid coding process of an audio signal. The method includes calculating a stereo scaling factor in a group level that is definable within a stereo band. The method may also include updating the stereo scaling factor using an update rate and synchronizing the update rate of a spatial parameter during a fast changing transient portion of the signal. A number of groups in a first stereo band may be greater than a number of groups in a second stereo band, and the first stereo band may be a lower frequency band than the second band or may be perceptually more important than the second band.
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申请公布号 |
US2008199014(A1) |
申请公布日期 |
2008.08.21 |
申请号 |
US20070006096 |
申请日期 |
2007.12.28 |
申请人 |
STMICROELECTRONICS ASIA PACIFIC PTE LTD |
发明人 |
KURNIAWATI EVELYN;GEORGE SAPNA |
分类号 |
H04R5/00 |
主分类号 |
H04R5/00 |
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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