Patent ID: 6668021
Filing Date: 2003-12-23
Classification: H04N

Abstract:
An encoding apparatus, comprising:(a) an inputting unit, arranged to input image data including luminance component data and color component data; (b) a block forming unit, arranged to divide the image data input by said inputting unit into blocks so as to divide the respective component data into the blocks separately; and (c) an encoding unit, arranged to encode the image data divided into the blocks by said block forming unit, said encoding unit including a code amount control unit, arranged to control a code amount of encoded data on a unit basis of a predetermined number of blocks, the predetermined number of blocks being formed so as to include at least one of the blocks of each type of component data, wherein said encoding unit includes a quantization unit, arranged to quantize the image data, and said code amount control unit controls the code amount using a quantization parameter of said quantization unit, and wherein, in a case that the code amount of encoded data of the predetermined number of blocks exceeds a predetermined amount, said code amount control unit deletes the encoded data of a high frequency component of the color component data at a higher ratio than the encoded data of a high frequency component of the luminance component data.