Pyramid vector quantization applied to a video coding scheme for contribution quality

A novel effective video coding scheme for contribution quality is presented. Starting from the CMTT/2 proposal, a modified video coding scheme obtained by introducing vector quantization instead of scalar quantization is presented. In particular, pyramid vector quantization (PVQ), able to exploit the Laplacian distribution of discrete cosine transform (DCT) coefficients, has been chosen as the VQ method. Two DCT coefficient coding strategies have been tested, based on stripe and field base, both using an efficient design of vectors to be quantized. Simulations show that the proposed video coding scheme, without introducing considerable computational effort and working at 22 Mbit/s, gives the same contribution quality as the CMTT/2 proposal at 45 Mbit/s.<>