function [ imgYCbCr ] = D35WQ8_RGB_to_YCbCr( imgRGB )
    %imgRGB = double(imgRGB);
    x = reshape(imgRGB, [], 3);
    W = [.299, .587, .114; -.1687, .3313, .5; .5, -.4187, .0813];
    
    
    % 128 downscaled to 0.5
    %b = [0, .5, .5];
    b = [0, 128.0, 128.0];
    y = x*W';
    
    y_b = bsxfun(@plus, y, b);
    imgYCbCr = reshape(y_b, size(imgRGB));
    
    
end