Method and system for implementing a low complexity spectrum estimation technique for comfort noise generation
US7013271B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2002 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Dec 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2025/783
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for implementing a low complexity spectrum estimation technique for comfort noise generation are disclosed. Another aspect of the present invention involves segregating filter parameter encoding from an adaptation process for transmission in the form of silence insertion descriptors. A method for implementing a spectrum estimation for comfort noise generation comprises the steps of receiving an input noise signal; approximating a spectrum of the input noise signal using an algorithm over a period of time; detecting an absence of speech signals; and generating comfort noise based on the approximating step when the absence of speech signals is detected; wherein the spectrum of the input noise signal is substantially constant over the period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.