Patent ID: 8254708
Filing Date: 2012-08-28
Classification: H04N

Abstract:
1. An encoding device comprising: a color difference signal encoding unit configured to encode a color difference signal for each processing block in a plurality of color difference signal encoding modes to generate a plurality of color difference signal bit streams; a color difference mode selecting unit configured to select a color difference signal encoding mode from said plurality of color difference signal encoding modes as the selected color difference mode; a luminance signal encoding unit configured to calculate a luminance target code amount based on a subtraction value obtained by subtracting the code amount of a color difference signal bit stream encoded with said selected color difference mode selected by said color difference mode selecting unit from a fixed code amount, and encode a luminance signal for said each processing block so as to be equal to or smaller than this luminance target code amount to generate a luminance signal bit stream; a color difference reselecting unit configured to select as a reselected color difference mode the color difference signal encoding mode corresponding to said color difference signal bit stream of which the total code amount including the code amount of said luminance signal bit stream is equal to or smaller than said fixed code amount, and also the deterioration as to said color difference signal is small, as the reselected color difference mode; and a multiplexing unit configured to multiplex said luminance signal bit stream, and the color difference signal bit stream encoded with said reselected color difference mode to generate a bit stream made up of the code block of said fixed code amount.