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
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