Apparatus for encoding and decoding image using adaptive DCT coefficient scanning based on pixel similarity and method therefor
US11949881B2 · kind B2 · utility
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Inventors
Key dates
| Filing date | Apr 1, 2021 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Feb 11, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.