Compensation of transient effects in transform coding
US7386445B2 · kind B2 · utility
8Cited by
7References
75Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 18, 2005 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | Oct 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/025
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method for compensating transient effects in transform coding and decoding of a combined speech and audio in electronic devices by using a transform based time-frequency domain codec. The method can combine, e.g., a CELP (code excited linear prediction) type speech codec and a transform type audio codec. The invention describes a compensation method to handle the transient (e.g., from the CELP coding to the transform coding) in transform coding when the number of quantized transform coding coefficients is lower than in the output of the transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.