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 select ed from a group of two or more of such functions are employed in calculating th e 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 loo p that includes the perceptual loudness calculation. |
申请公布号 |
CA2525942(A1) |
申请公布日期 |
2004.12.23 |
申请号 |
CA20042525942 |
申请日期 |
2004.05.27 |
申请人 |
DOLBY LABORATORIES LICENSING CORPORATION |
发明人 |
SMITHERS, MICHAEL J.;CROCKETT, BRETT GRAHAM;SEEFELDT, ALAN JEFFREY |
分类号 |
G10L11/00;H03G3/32;H03G9/02 |
主分类号 |
G10L11/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|