Patent ID: 6088395
Filing Date: 2000-07-11
Classification: H03M,H04N

Abstract:
A compressing/decompressing apparatus having a frame buffer memory and a display for compressing and decompressing a video graphics signal, comprising:a receiver for receiving said video graphics signal comprising a plurality of video graphics packets, wherein each video graphics packet comprises a plurality of pixels;a memory interface coupled between the frame buffer memory and a compressor and a decompressor;said compressor coupled to said receiver for sequentially receiving a video graphics packet of said video graphics signal, truncating each pixel in said video graphics packet by a predetermined number of LSBs to form a compressed video graphics signal comprising a plurality of such compressed video graphics packets, and storing said compressed video graphics signal in said frame buffer memory through said memory interface; andsaid decompressor, coupled to said memory interface, for sequentially receiving a compressed video graphics packet of said compressed signal, recovering each pixel of said compressed video graphics packet with an adjusted value of said predetermined number of LSBs to form a decompressed video graphics signal comprising a plurality of such decompressed video graphics packets, and outputting said decompressed video graphics signal to said display through said memory interface;wherein said video graphics packet comprises a first pixel and a second pixel, and said compressed video graphics packet is formed by truncating said first pixel by a first number of LSBs and truncating said second pixel by a different second number of LSBs.