Method of transmitting speech using discontinuous transmission and comfort noise
US6381568B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | May 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/78
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Speech transmission method by initializing silence, transmit, and blank-period counters; receiving frame; determining frame is speech; if transmit counter is zero and blank-period counter is less than x then discard frame, increment blank-period counter, and return to second step; if transmit counter is zero, blank-period counter greater than x−1, and frame not speech then discard frame, increment blank-period counter, and return to second step; if transmit counter is zero, blank-period counter greater than x−1, and frame is speech then set transmit counter to one, set blank-period counter to zero, set silence counter to zero, encode frame, transmit encoded frame, and return to second step; if transmit counter is one, frame not speech, and silence counter less than y then encode frame, transmit encoded frame, increment silence counter, and return to second step; if transmit counter is one, frame not speech, and silence counter greater than y+z−2 then set transmit counter to zero, discard frame, encode comfort noise, transmit encoded comfort noise, increment silence counter, and return to second step; if transmit counter is one, frame not speech, and silence counte…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.