A discussion of a compressed-domain approach for designing and implementing digital video coding systems, which is drastically different from the traditional hybrid approach. It demonstrates how the combination of discrete cosine transform (DCT) coders and motion compensated (MC) units reduces power consumption and hardware complexity.
Background and standards: video communications; motion-compensated DCT video coding; video coding standards. Algorithms: DCT-based motion estimation; interpolation-free subpixel motion estimation; DCT-based motion compensation schemes; MPEG-4 and content-based video coding. Architectures and implementation: dual generation of DCT and DST; efficient design of video coding engine; low-power and high-performance design. Applications: end-to-end video over IP delivery.