Dynamic codec speed selection and bandwidth preallocation in a voice packet network method and apparatus
US6754232B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 2000 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Jan 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2207/203
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Dynamic compressor/decompressor (codec) speed selection includes monitoring a call in a telephone system to determine the type of codec being used thereon and to measure the payload on the codec. The capacity of the codec is determined based upon the determined type of codec being used. Speed selection further includes comparing the determined capacity with the measured payload; and selectively switching the call to a higher operational speed based upon the result of the comparing. Preferably, the monitoring includes detecting a modem answer tone of the telephone call and basing the determination of the type of codec at least partly thereon. The monitoring also preferably includes detecting silence of the telephone call and basing the selective switching at least partly thereon. Echo cancellation and/or suppression is disabled upon such selective switching. In accordance with one embodiment of the invention, the switching includes requesting an up-speed codec. In such case, the method further includes verifying network bandwidth prior to the requesting of the up-speed codec. The network bandwidth is pre-allocated in accordance with the invention after the up-speed codec is requeste…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.