Method of coding 32-kb/s audio signals

Details Method of coding 32-kb/s audio signals Method of coding 32-kb/s audio signals

H - Electricity

04

B

H04B 1/66 (2006.01) G10L 19/02 (2006.01) G10L 9/00 (1995.01)

Patent

CA 2075754

For audio signals (50 to 7000 Hz), good speech quality is to be achieved at a data rate of 32 kb/s (also for music signal(s), which requires a considerably greater data reduction than hitherto known. For a further data reduction of the magnitude values of the coefficients obtained by FFT, the absolute threshold of hearing and a relative threshold of hearing known as masking effect are taken into account in fixing the quantization levels. This is followed by a variable quantization.

Pour les signaux audio (de 50 à 7 000 Hz), on obtient une bonne qualité vocale à un débit de données de 32 Kb/s (ainsi que pour les signaux musicaux), ce qui nécessite une réduction des données beaucoup plus grande que celles utilisées jusqu'ici. Pour réaliser une plus grande réduction des données en rapport avec les grandeurs des coefficients obtenus par une transformation de Fourier rapide, on tient compte du seuil d'audition absolu et d'un seuil d'audition relatif (effet de masquage) en fixant les niveaux de quantification. On a ensuite recours à une quantification variable.

Affiliated with

Also associated with

Rating

Method of coding 32-kb/s audio signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of coding 32-kb/s audio signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of coding 32-kb/s audio signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1454962