Patent ID: 6018368
Filing Date: 2000-01-25
Classification: H04N

Abstract:
A scalable encoder for producing an optimal weight for scaling an optimal motion vector to be applied to a low-resolution image decimated from a high-resolution image, the encoder comprising:an 8*8 block DCT for dividing a video signal input by frames into 8*8 blocks, and performing DCT to the video signal divided;a 4*4 block decimator for decimating 4*4 blocks of video signal from the video signal DCT transformed;a 4*4 block quantizer for quantizing the video signal decimated;a 4*4 block inverse quantizer for inversely quantizing the signal quantized;a 16*16 block divider for dividing the input video signal into 16*16 blocks;a motion vector detector for detecting a motion vector from a video signal from the 16*16 block divider, and a video signal from the frame memory; andan optimal weight generator for scaling the motion vector from the motion vector detector into multiple scaled motion vectors according to multiple weights within a predetermined range, and producing an optimal weight having the best among signal-to-ratios based upon a sampled image and multiple 4*4 block images produced according to the scaled motion vector.