Systems and methods for low bit rate audio coders
US7640157B2 · kind B2 · utility
1Cited by
1References
19Claims
0Family size
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Key dates
| Filing date | Feb 6, 2004 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Mar 15, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique to enhance audio quality of a quantized audio signal when a perceptual audio coder is operating at low bit rates. The perceptual audio coder uses a modified two-loop quantization technique that maintains audio quality at medium to high bit rates while eliminating artifacts at low bit rates. The perceptual audio coder saves vanishing bands by stealing bits from surviving bands to reduce artifacts at low bit rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.