H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/71
H03M 7/50 (2006.01) H04B 1/66 (2006.01)
Patent
CA 1188423
IMPROVED SPEECH CODING METHOD AND DEVICE FOR IMPLEMENTING THE IMPROVED METHOD Abstract Method for coding a speech-originating signal. The spectrum of the initial signal covering a frequency range of 0-4000 Hz is split into 16 subbands, each one containing 12-bit coded samples. The samples of the 16 sub-bands are requantized in BCPCM at dynamically variable bit rates. For this, the sample flow of the sub-bands is divided into blocks of a given duration, then each block is processed for deriving therefrom two scale factors, the difference of which is analyzed to define the sample block as transient or non-transient block. For each non-transient block, only one scale factor is retained, whereas for a transient block, both scale factors are retained. The signal samples of the 16 sub- bands are then dynamically requantized with an overall number of bits depending on whether the block considered is transient or non-transient.
401879
Beraud Jean-Paul
Esteban Daniel
Galand Claude
Barrett B.p.
International Business Machines Corporation
LandOfFree
Speech coding method and device for implementing the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Speech coding method and device for implementing the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech coding method and device for implementing the... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1307140