Super-Resolution Still and Video Reconstruction from MPEG Coded Video
Abstract
Transform coding is a popular and effective compression method for both still images and video sequences, as is evident from its widespread use in international media coding standards such as MPEG, H.263 and JPEG. The motion-compensated image (or the image itself) is divided into blocks and each block is independently transformed by a 2-D orthogonal transform to achieve energy compaction. The most commonly used transform is the discrete cosine transform (DCT). After the block transform, the transform coefficients undergo a quantization step. At low bit-rates, the DCT coefficients are coarsely quantized. This coarse quantization with independent quantization of neighboring blocks gives rise to blocking artifacts visible block boundaries.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 2004
- Accession Number
- ADA425551
Entities
People
- Yucel Altunbasak
Organizations
- Georgia Tech Research Corporation