Sound encoding apparatus and method, and sound decoding...

Details Sound encoding apparatus and method, and sound decoding... Sound encoding apparatus and method, and sound decoding...

G - Physics

10

L

G10L 19/00 (2006.01) G10L 19/04 (2006.01) G10L 19/12 (2006.01) H03M 7/30 (2006.01)

Patent

CA 2440820

A plurality of sets of position code books indicating the pulse position are provided in a multi-set position code book storing circuit (450). In accordance with a pitch prediction signal obtained in an adaptive code book circuit (500), one type of position code book is selected from the plurality of position code books in a position code book circuit (510). From the selected position code book, a position is selected by a sound source quantization circuit (350) so as to minimize distortion of a sound signal. An output of the adaptive code book circuit (500) and an output of the sound source quantization circuit (350) are transferred. Thus, a sound signal can be encoded while suppressing deterioration of the sound quality with a small amount of calculations even when the encoding bit rate is low.

Plusieurs ensembles de tables de codage de positions indiquant la position d'impulsions sont stockés dans un circuit de stockage (450) de tables de codage de positions d'ensembles multiples. En fonction du signal de prédiction de pas obtenu dans un circuit (500) adaptatif de tables de codage, on choisit parmi plusieurs un type de table de codage de positions dans un circuit (510) de tables de codage de positions. A partir de la table de codage de positions sélectionnée, on sélectionne une position à l'aide d'un circuit (350) de quantification des sources sonores pour réduire les distorsions du signal sonore, puis on transfert les signaux de sortie du circuit (500) adaptatif de tables de codage, et du circuit (350) de quantification des sources sonores. On peut donc coder un signal sonore en supprimant la détérioration de la qualité du son avec une petite quantité de calculs, même en cas de faible débit binaire de codage.

Affiliated with

Also associated with

Rating

Sound encoding apparatus and method, and sound decoding... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sound encoding apparatus and method, and sound decoding..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sound encoding apparatus and method, and sound decoding... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1402811