(19) | |
| (11) | EP 1 763 020 A3 |
(12) | EUROPEAN PATENT APPLICATION |
(88) | Date of publication A3: | | 29.09.2010 Bulletin 2010/39 |
(43) | Date of publication A2: | | 14.03.2007 Bulletin 2007/11 |
(22) | Date of filing: 03.06.1992 |
| (51) | International Patent Classification (IPC): |
|
(84) | Designated Contracting States: | | AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE |
(30) | Priority: | 11.06.1991 US 713661
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(62) | Application number of the earlier application in accordance with Art. 76 EPC: | | 06005794.0 / 1675100 | | 02007854.9 / 1239456 | | 01103641.5 / 1126437 | | 92913505.1 / 0588932 |
(71) | Applicant: QUALCOMM INCORPORATED | | San Diego, CA 92121-1714 (US) |
| (72) | Inventors: | | - Jacobs, Paul E.
San Diego
CA 92121 (US) - Gardner, William R.
San Diego
CA 92121 (US) - Lee, Chong U.
San Diego
CA 92121 (US) - Gilhousen, Klein S.
San Diego
CA 92121 (US) - Lam, Katherine S.
San Diego
CA 92121 (US) - Tsai, Ming-Chang
San Diego
CA 92121 (US)
|
(74) | Representative: Carstens, Dirk Wilhelm | | Wagner & Geyer
Gewürzmühlstrasse 5 80538 München 80538 München (DE) |
|
| |
(54) | Variable rate vocoder |
(57) A method of speech signal compression, by variable rate coding of frames of digitized speech samples, comprising the steps of: determining a level of speech activity for a frame of digitized speech samples; selecting an encoding rate from a set of rates based upon said determined level of speech activity within said frame; coding said frame according to a predetermined coding format for said selected rate wherein each rate has a corresponding different coding format; providing for said frame a corresponding output data packet at said selected rate.