Transcoder with prevention of tandem coding of speech

G - Physics – 10 – L

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G10L 19/14 (2006.01) H04Q 7/30 (2006.01)

Patent

CA 2217693

The invention relates to a transcoder (TRCU1, TRCU2) having means for preventing tandem coding of speech in a mobile to mobile (MS1, MS2) call within a mobile communication system which employs a speech coding method for reducing transmission rate on the radio path. The transcoder (TRCU1, TRCU2) comprises a speech coder (52, 73) which encodes the speech signal into speech parameters for transmission to a mobile station, and decodes the speech parameters received from the mobile station into a speech signal according to said speech coding method, as well as a PCM coder (54, 72) for transmitting an uplink speech signal to and for receiving a downlink speech signal from a PCM interface in the form of PCM speech samples. In addition to the normal operation, the transcoder transmits and receives speech parameters through a PCM interface in a subchannel formed by least significant bits of the PCM speech samples. Thus, it is possible to prevent tandem coding but at the same time maintain the standard PCM interface and the signalling and services associated thereto.

L'invention concerne un transcodeur (TRCU1, TRCU2) pourvu de moyens empêchant le codage en cascade des signaux vocaux dans une communication de radiotéléphone à radiotéléphone (MS1, MS2) à l'intérieur d'un système de télécommunication mobile employant un procédé de codage des signaux vocaux pour réduire la rapidité de transmission sur le trajet radioélectrique. Le transcodeur (TRCU1, TRCU2) comprend un codeur de signaux vocaux (52, 73) qui code le signal vocal en paramètres de signaux vocaux afin de le transmettre à une station mobile, et qui décode ces mêmes paramètres reçus de ladite station mobile en un signal vocal selon ledit procédé de codage des signaux vocaux, ainsi qu'un codeur MIC (54, 72) destiné à émettre un signal vocal de liaison montante à destination d'une interface MIC et à recevoir un signal vocal de liaison descendante en provenance de cette même interface sous forme d'échantillons vocaux MIC. Outre son fonctionnement normal, le transcodeur émet et reçoit des paramètres de signaux vocaux par l'intermédiaire d'une interface MIC dans un sous-canal formé par des bits de poids faible des échantillons vocaux MIC. Il est ainsi possible d'empêcher le codage en cascade tout en maintenant l'interface MIC normalisée et les signalisations et services qui y sont associés.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Transcoder with prevention of tandem coding of speech does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transcoder with prevention of tandem coding of speech, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transcoder with prevention of tandem coding of speech will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1414886

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.