×

Method to generate telephone comfort noise during silence in a packetized voice communication system

  • US 6,643,617 B1
  • Filed: 05/22/2000
  • Issued: 11/04/2003
  • Est. Priority Date: 05/28/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of providing comfort noise in a packetized voice communication system having a transmitter and a receiver, said transmitter being adapted to halt transmission of packets of voice samples after a predetermined time period following detection of silence, and said receiver having a first pointer to a first address in a buffer into which an incoming one of said packets of voice samples is stored and a second pointer to a second address in said buffer from which an outgoing one of said packets of voice samples is retrieved, said buffer being of a size to store a plurality of said packets of voice samples representing a speech duration which is less than said predetermined time period such that said buffer is full of noise samples after said transmitter has been halted, said method comprising the steps of:

  • continuously comparing said second pointer to said first pointer and, in the event said second address is equal to said first address, then loading said second pointer with a random number and retrieving and outputting from said second address pointed to by said second pointer said outgoing one of said packets of voice samples.

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