G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 11/00 (2006.01) G10L 19/00 (2006.01) G10L 19/02 (2006.01) G10L 21/00 (2006.01) H04S 1/00 (2006.01)
Patent
CA 2161263
A method is provided herein for determining the type of coding to be selected for coding at least two signals, in which a transformation of signals into the frequency domain is carried out and, starting from spectral values, a similarity measure is determined on the basis of which one of at least two types of coding is selected. The invention involves the first step of coding at least one of such signals and then decoding in that type of coding which is used in the case of determining a high similarity measure, thereby generating at least one signal which is affected by coding error. Such signal which is affected by coding error and the associated signal which is not affected by the coding error are each transformed into the frequency domain. The respectively actually audible spectral components are either selected or evaluated starting both from the spectral values of the signal which is affected by coding error and from the spectral values of the associated signal which is not affected by the coding error using a listening threshold which is determined by a psychoacoustic calculation. The similarity measure is then calculated on the basis of the audible spectral components of at least the signal which is affected by coding error and the associated signal which is not affected by the coding error.
Lors du codage de plusieurs signaux (k1, k2) qui ne sont pas indépendants les uns des autres, la sélection du mode approprié de codage se fait en fonction d'une mesure de similitude. Dans un aspect de l'invention, on détermine la mesure de similitude tout d'abord en codant un des signaux (k1, k2) selon le procédé stéréo d'intensité puis en le décodant, afin de créer un signal (ki1, ki2) porteur d'une erreur de codage. Ce signal, ainsi que le signal non codé correspondant, sont transformés dans la plage de fréquences. Les composantes spectrales réellement audibles aussi bien du signal (ki1, ki2) porteur d'une erreur de codage que du signal correspondant (k1, k2) non porteur d'une erreur de codage sont sélectionnées ou évaluées dans la plage de fréquences en utilisant un seuil d'écoute déterminée par un calcul psychoacoustique. Lorsque le degré de similitude est élevé, un codage stéréo d'intensité est réalisé, autrement les canaux sont séparément codés.
Brandenburg Karlheinz
Eberlein Ernst
Grill Bernhard
Herre Jurgen
Seitzer Dieter
Borden Ladner Gervais Llp
Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung
LandOfFree
Process for determining the type of coding to be selected... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for determining the type of coding to be selected..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for determining the type of coding to be selected... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1558256