Abstract
We propose a color space transform for 4:4:4 video coding. The uncorrelated noise contained in specific color component deteriorates compression efficiency. The proposed transform can limit the propagation of the uncorrelated noise of the color component to other color components by introducing zero coefficients in a transform matrix. Simulation results show that the proposed transform improves image quality after compression using extended JPEG in certain natural images. To achieve high image quality for any kind of image, an adaptive selection among conventional and the proposed color space transforms were performed by calculating the independency among color-difference components.
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