DCT compression using Golomb-Rice coding
US7031390B2 · kind B2 · utility
1Cited by
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5Claims
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Key dates
| Filing date | Jan 29, 2004 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Feb 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/93
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method to encode the run-lengths and amplitude of the quantized DCT coefficients in a lossless manner is used to achieve compression. Specifically, Golomb-Rice coding is used to encode both zero runs and non-zero amplitudes of the DCT coefficients after quantization. It is found that the use of a scheme taking advantage of an exponential distribution of data, such as Golomb-Rice coding, allows for higher coding efficiencies than alternate schemes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.