MPEG-2 nonlinear temporally scalable coding and hybrid quantization

In this paper, we investigate the MPEG-2 temporal scalability syntax and introduce a new approach to temporally scalable coding. Temporal scalability is provided by employing various nonlinear prediction and demultiplexing schemes. A nonlinear deinterlacing algorithm is presented and the related issues on interlaced, progressive and mixed mode video processing are addressed. In addition to the considered scalability techniques, a lookahead quantization scheme is presented for P- and B-type picture coding, which improves the coding performance by selective combination of the DCT domain scalar quantization and entropy-constrained vector quantization. Remarkable performance improvement over the simulcast coding is achieved