Method and system for transmitting digitized voice signals as packets of bits
First Claim
1. A method of transmitting voice signals generated by source terminals through a digital transmission network, in the form of packets of bits, characterized in that it includes, for each active source, the steps of:
- dividing the signal from said source into segments of predetermined duration, said segments being digitally coded;
performing a so-called activity detection to detect segments corresponding to pauses of said sources; and
,assembling bits derived from said coding in the form of packets, each packet containing bits from at least one voice signal segment and at least one header (H2) comprising in particular a parity bit whose value is changed subsequent to detection of a so-called long pause whose duration exceeds a predetermined time interval, and bits indicating a sequence number (PS);
each of said packets of bits being intended to be transmitted through said digital transmission network subject to a condition related to said activity detection being satisfied.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of transmitting digitized voice signals as packets of bits in a digital transmission network to which a plurality of terminals acting as sources of voice signals are attached. The method includes, at the transmitting end and for each source, the steps of: a dividing the signal into successive, digitally-coded segments; performing a so-called source activity detection; and assembling the bits resulting from the coding operation into packets, each packet being provided with a header containing, in particular, a parity bit whose logic value is modified whenever an inactivity or long pause is detected. At the receiving end, detection of a change in the value of said parity bit causes the delivery of a packet of bits to the decoder/synthesizer to be delayed by a given time interval called retention delay.
-
Citations
24 Claims
-
1. A method of transmitting voice signals generated by source terminals through a digital transmission network, in the form of packets of bits, characterized in that it includes, for each active source, the steps of:
-
dividing the signal from said source into segments of predetermined duration, said segments being digitally coded; performing a so-called activity detection to detect segments corresponding to pauses of said sources; and
,assembling bits derived from said coding in the form of packets, each packet containing bits from at least one voice signal segment and at least one header (H2) comprising in particular a parity bit whose value is changed subsequent to detection of a so-called long pause whose duration exceeds a predetermined time interval, and bits indicating a sequence number (PS); each of said packets of bits being intended to be transmitted through said digital transmission network subject to a condition related to said activity detection being satisfied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification