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
US8634461B2 · kind B2 · utility
19Cited by
12References
3Claims
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
An image decoding apparatus for decoding a bit stream includes a decoding unit that decodes the bit stream and generates a chroma component of quantized coefficients. The image decoding apparatus also includes a dequantization unit that performs a 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. Further, the image decoding apparatus includes a transform unit that performs an inverse orthogonal transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.