Extraction the Reduced P-Image from H.264/AVC Compressed Bit Stream
Thy-Linh Nguyen, Hyung‐Suk Oh, Wonha Kim · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2009
The reduced or small size image extracting DC coefficients from the H.264/AVC compressed bit stream is sixteen times smaller than the original image. In its small size, this image still retains a significant amount of information. We propose a scheme directly generating the small image from H.264 compressed bit stream. We extract only DC values from transform coefficients of H.264 bit stream with higher resolution. DC values become pixel values of the small image. The proposed method requires much less computational load and memory access, compared to the conventional method that decodes the bit stream to produce images and down-samples the decoded images.