×

Variable rate vocoder

  • US 5,414,796 A
  • Filed: 01/14/1993
  • Issued: 05/09/1995
  • Est. Priority Date: 06/11/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. 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 for said frame;

    coding said frame according to a coding format of a set of coding formats for said selected rate wherein each rate has a corresponding different coding format and wherein each coding format provides for a different plurality of parameter signals representing said digitized speech samples in accordance with a speech model; and

    generating for said frame a data packet of said parameter signals.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×