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
US8265143B2 · kind B2 · utility
32Cited by
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4Claims
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Key dates
| Filing date | Feb 9, 2012 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Feb 9, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/44
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image information decoding method for decoding a bit stream in an image decoding apparatus. The decoding process includes decoding, in a decoding unit in the image decoding apparatus, the bit stream and generating a chroma component of quantized coefficients; and performing, in a dequantization unit in the image decoding apparatus, dequantization on 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.
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