FIELD: data processing.
SUBSTANCE: invention relates to adaptive coding and decoding. Encoding of image elements including a quantization correction or scaling for the color components of the second color space in accordance with the color space adjustment coefficients for each component when switching from RGB to YCoCg the color space between two of the elements. Adjustment includes adjusting final or intermediate values of quantization parameter (QP) for color components YCoCg of color space, the QpY variable indicating intermediate QP value for the first color component for the RGB color space, and the color space correction factors for each component correct QpY by -5, -3 and -5 for the Y, Co, and Cg components, respectively.
EFFECT: technical result is to increase coding efficiency when switching between color spaces during encoding and decoding.
18 cl, 17 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ADAPTIVE SWITCHING OF COLOUR SPACES, COLOUR SAMPLING RATES AND/OR BIT DEPTHS | 2014 |
|
RU2653295C2 |
| FEATURES OF INTRA BLOCK COPY PREDICTION MODE FOR VIDEO AND IMAGE CODING AND DECODING | 2013 |
|
RU2654129C2 |
| METHOD AND DEVICE FOR DETERMINING THE VALUE OF QUANTIZATION PARAMETER | 2014 |
|
RU2674307C1 |
| CHROMA QUANTIZATION IN VIDEO CODING | 2014 |
|
RU2653475C2 |
| ENCODER, DECODER AND CORRESPONDING METHODS TO SIMPLIFY SIGNALING OF PICTURE HEADER | 2020 |
|
RU2823042C1 |
| SELECTION OF MOTION VECTOR PRECISION | 2014 |
|
RU2682859C1 |
| QUANTIZATION OF CHROMATICITY IN CODING VIDEO SIGNALS | 2019 |
|
RU2709797C1 |
| ENCODER, DECODER AND RELATED METHODS | 2020 |
|
RU2823668C1 |
| COLOUR CONVERSION FOR VIDEO ENCODING | 2020 |
|
RU2782437C1 |
| ENCODING RESIDUALS AND COEFFICIENTS FOR ENCODING VIDEO | 2022 |
|
RU2824946C2 |
