Video coding scheme using DCT-pyramid vector quantization

Author

Alessandro, Pierluigi D. ; Lancini, Rosa

Author_Institution

Contraves Co., Milan, Italy

Volume

4

Issue

3

fYear

1995

fDate

3/1/1995 12:00:00 AM

Firstpage

309

Lastpage

319

Abstract

A new and effective video coding scheme for contribution quality is proposed. The CMTT/2, a joint committee of CCIR and CCITT, has proposed a video coding scheme (already approved at European level by ETS) working at 34-45 Mbit/s. Basically this proposal includes a DCT transform for spatial correlation removal and motion compensation for temporal correlation removal. The individual transform coefficients are then scalar quantized with a non uniform bit assignment. Starting from the CMTT/2 proposal, the study presents a new video coding scheme designed using a vector quantizer solution instead of the scalar one. Specifically, the pyramid vector quantization (PVQ) has been chosen as the vector quantization method as it is able to reduce the DCT coefficients Laplacian distribution. Simulation results show that the proposed video coding scheme gives the same contribution quality at 22 Mbit/s as the one obtained with the CMTT/2 proposal at 45 Mbit/s

Keywords

discrete cosine transforms; image sequences; motion compensation; vector quantisation; video coding; 22 to 45 Mbit/s; DCT-pyramid vector quantization; Laplacian distribution; contribution quality; motion compensation; spatial correlation removal; temporal correlation removal; transform coefficients; video coding scheme; Bit rate; Discrete cosine transforms; Frequency; Helium; Image coding; Laplace equations; Motion compensation; Proposals; Vector quantization; Video coding;

fLanguage

English

Journal_Title

Image Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7149

Type

jour

DOI

10.1109/83.366479

Filename

366479