초록

용어보기논문에서 용어와 풀이말을 자동 추출한 결과로, 시범 서비스 중입니다. AI-Helper

Abstract ▼ AI-Helper

In this paper, an adaptive DCT with motion compensation for image data compression is proposed. DCT is very efficient for images with high spatial correlation, while it does not provide the efficiency for the prediction error images with low spatial correlation. In the proposed method, the simple s...

In this paper, an adaptive DCT with motion compensation for image data compression is proposed. DCT is very efficient for images with high spatial correlation, while it does not provide the efficiency for the prediction error images with low spatial correlation. In the proposed method, the simple square root function and logarithm is applied to the prediction error images in spatial domain in order to increase their spatial correlation. Then the edge patterns of the processed error images are classified into four and each pattern uses different quantization and bit allocation table after DCT. And the subsampling of error images gives further reduction of bitrate. For 15 frames of 512×480 images at the bitrate of 1.0 bpp, PSNR is over 40dB and unnatural distortion cannot be recognized.