(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

(21)Application number: 06025869.6

(22)Date of filing:  03.06.1992
(51)International Patent Classification (IPC): 
G10L 19/14(2006.01)
(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

(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.





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