Efficient excitation quantization in noise feedback coding with general noise shaping
US7206740B2 · kind B2 · utility
27Cited by
59References
14Claims
0Family size
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Key dates
| Filing date | Aug 12, 2002 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Oct 24, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a Noise Feedback Coding (NFC) system operable in a ZERO-STATE condition and a ZERO-INPUT condition, the NFC system including at least one filter having a filter memory, a method of updating the filter memory. The method comprises: (a) producing a ZERO-STATE contribution to the filter memory when the NFC system is in the ZERO-STATE condition; (b) producing a ZERO-INPUT contribution to the filter memory when the NFC system is in the ZERO-INPUT condition; and (c) updating the filter memory as a function of both the ZERO-STATE contribution and the ZERO-INPUT contribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.