发明名称 |
Method, apparatus and computer program for calculating and adjusting the perceived loudness of an audio signal |
摘要 |
One or a combination of two or more specific loudness model functions selected from a group of two or more of such functions are employed in calculating the perceptual loudness of an audio signal. The function or functions may be selected, for example, by a measure of the degree to which the audio signal is narrowband or wideband. Alternatively or with such a selection from a group of functions, a gain value G[t] is calculated, which gain, when applied to the audio signal, results in a perceived loudness substantially the same as a reference loudness. The gain calculating employs an iterative processing loop that includes the perceptual loudness calculation. |
申请公布号 |
US2007092089(A1) |
申请公布日期 |
2007.04.26 |
申请号 |
US20040558246 |
申请日期 |
2004.05.27 |
申请人 |
DOLBY LABORATORIES LICENSING CORPORATION |
发明人 |
SEEFELDT ALAN J.;SMITHERS MICHAEL J.;CROCKETT BRETT G. |
分类号 |
H03G3/00;G10L11/00;H03G9/02 |
主分类号 |
H03G3/00 |
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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