H - Electricity – 03 – G
Patent
H - Electricity
03
G
H03G 3/32 (2006.01) H03G 9/02 (2006.01) H03G 9/14 (2006.01)
Patent
CA 2581810
The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment. The invention includes not only methods but also corresponding computer programs and apparatus.
L'invention concerne la mesure et la commande de la force sonore perçue et/ou de l'équilibre spectral perçu d'un signal audio. Un signal audio est modifié en réponse aux calculs effectués au moins en partie dans le domaine de la force sonore perceptif (psychoacoustique). Le procédé selon l'invention est utile, par exemple, dans : une commande de volume à compensation de la force sonore, une commande de gain automatique, une commande de la gamme dynamique (notamment, par exemple, des limiteurs, des compresseurs, des extenseurs, etc.), une égalisation dynamique et une compensation des interférences du bruit de fond dans un environnement de lecture audio. L'invention concerne non seulement des procédés mais également des programmes informatiques et des appareils correspondants.
Seefeldt Alan Jeffrey
Dolby Laboratories Licensing Corporation
Smart & Biggar
LandOfFree
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