An adaptive hybrid coding scheme for HDTV and digital video sequences

Author

Al-Asmari, Awad Kh

Author_Institution

Dept. of Electr. Eng., King Saud Univ., Riyadh, Saudi Arabia

Volume

41

Issue

3

fYear

1995

fDate

8/1/1995 12:00:00 AM

Firstpage

926

Lastpage

936

Abstract

In this paper, the image sequences are decomposed into seven sub-bands in the spatial domain using GQMF filters. Then, the base-band is interframe encoded using a simple 3-D block-matching method and LADVQ search algorithm. This band is used to decide the codebooks and the blocks sizes for encoding the high frequency bands. To reduce the complexity, the high-bands are encoded using the LAVQ. The simulation results show that good quality pictures can be obtained at a bit rate as low as 0.290 bpp (about 15 Mbits/sec). This rate will facilitate the transmission of three HDTV channels via a DS3 rated 45 Mbits/sec channel. This algorithm is tested on digital video sequences. We obtain high quality reconstructed images at an average bit rate of 0.460 bpp with PSNR of 35.04 dB

Keywords

adaptive codes; block codes; computational complexity; digital television; high definition television; image reconstruction; image sequences; quadrature mirror filters; vector quantisation; video coding; 3D block-matching method; GQMF filters; HDTV; LADVQ search algorithm; adaptive hybrid coding scheme; algorithm; base-band; codebooks; decomposition; digital video sequences; high frequency bands; high quality reconstructed images; image sequences; interframe encoding; simulation; spatial domain; sub-bands; Bit rate; Filters; Frequency; HDTV; Image coding; Image sequences; Redundancy; Transform coding; Vector quantization; Video sequences;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.468063

Filename

468063