HDTV/standard-TV compatible coding based on DCT

Author

Yashima, Yoshiyuki ; Sakai, Hiroshi ; Sawada, Katsutoshi

Author_Institution

NTT Human Interface Lab., Kanagawa, Japan

fYear

1990

fDate

1-3 May 1990

Firstpage

1895

Abstract

A compatible coding system for 1125-line, 60-Hz HDTV and 525-line, 60-Hz standard TV is presented. This system allows an HDTV signal to be transmitted at about 140 Mb/s. From the coded HDTV signal, a standard TV signal as well as the HDTV signal can be easily decoded. The coding algorithm uses adaptive intrafield/interframe discrete cosine transform (DCT) coding in which only low-frequency components of the coded DCT coefficients are used for the reconstruction of the standard TV, while all frequency components are used for HDTV. The configuration of a compatible codec is based on this scheme. The architecture uses parallel DCT coding to realize signal processing at very high sampling rates. Computer simulation results show good picture quality for both decoded HDTV and standard TV

Keywords

codecs; decoding; digital communication systems; encoding; high definition television; parallel processing; picture processing; television equipment; transforms; video signals; 1125-line; 140 Mbit/s; 525-line; 60 Hz; BISDN; HDTV signal; adaptive intrafield/interframe DCT coding; bit rate reduction; broadband ISDN channel; codec; coded DCT coefficients; coding algorithm; compatible coding system; discrete cosine transform; high sampling rates; parallel DCT coding; signal processing; standard TV; Code standards; Codecs; Computer architecture; Decoding; Discrete cosine transforms; Frequency; HDTV; Signal processing; Signal processing algorithms; TV;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1990., IEEE International Symposium on

Conference_Location

New Orleans, LA

Type

conf

DOI

10.1109/ISCAS.1990.112053

Filename

112053