Method and apparatus for coding image information, method and apparatus for decoding image information, method and apparatus for coding and decoding image information, and system of coding and transmitting image information
US8634460B2 · kind B2 · utility
19Cited by
11References
2Claims
0Family size
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Key dates
| Filing date | Dec 6, 2012 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Dec 6, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/44
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A decoding method decodes a bit stream in an image decoding apparatus. The method includes decoding, in a decoding unit in the image decoding apparatus, the bit stream, and generating a luma component of quantized coefficients and a chroma component of quantized coefficients. The method also includes performing, in a dequantization unit in the image decoding apparatus, dequantization on the luma component of quantized coefficients and the chroma component of quantized coefficients using a chroma quantization parameter calculated on the basis of a luma quantization parameter weighted by an addition operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.