Encoding method and apparatus, and decoding method and apparatus
US9424857B2 · kind B2 · utility
1Cited by
7References
34Claims
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Key dates
| Filing date | Mar 31, 2011 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Jun 6, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An encoding method of an encoder is provided. The encoder generates first MDCT coefficients by transforming an input signal, and generates MDCT indices by quantizing the first MDCT coefficients. The encoder generates second MDCT coefficients by dequantizing the MDCT indices, and calculates MDCT residual coefficients using differences between the first MDCT coefficients and the second MDCT coefficients. The encoder generates a residual index by encoding the MDCT residual coefficients, and generates gain indices corresponding to gains from the first MDCT coefficients and the second MDCT coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.