Patent ID: 6697431
Filing Date: 2004-02-24
Classification: H04N

Abstract:
An image signal display system for decoding an input image signal coded by a hybrid coding method using both intra-frame coding and interframe coding, and displaying said decoded image signal on a display device, comprising:a variable length decoding section for performing variable length decoding on said input image signal, and generating motion vector information, coefficient information, time information and header information; an inverse quantization section for performing inverse quantization on said coefficient information output from said variable length decoding section; a DC (direct current) level distribution information detection section for temporarily storing only DC component information of said inversely quantized coefficient information output from said inverse quantization section, generating distribution information of said DC component information corresponding to one frame, and outputting said generated distribution information; an inverse DCT section for performing inverse DCT on said inversely quantized coefficient information output from said inverse quantization section; a motion compensation section for performing motion compensation based on said inversely discrete-cosine-transformed coefficient information output from said inverse DCT section and said motion vector information, and generating a first output image signal; a frame buffer for temporarily storing said first output image signal output from said motion compensation section; an output signal correction section for correcting said first output image signal output from said motion compensation section based on said distribution information of said DC component information output from said DC level distribution information detection section, and generating a second output image signal; and an image display section for displaying said second output image signal output from said output signal correction section.