Design and analysis of two-channel high definition television systems

Author

Nasrabadi, Nasser M. ; Choo, Chang Y.

Author_Institution

Dept. of Electr. Eng., Worcester Polytech. Inst., MA, USA

Volume

36

Issue

2

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

175

Lastpage

183

Abstract

A technique for the analysis of two-channel high-definition television (HDTV) transmission systems is presented. Design methods based on limitations due to the combined spatial and temporal characteristics of the human visual system (HVS) are developed. The concepts of resolution imbalance, recognizability, and spatial-temporal multiplexing are explained. The design and analysis of two-channel NTSC-compatible HDTV systems having an aspect ratio of 16:9 with double the vertical and horizontal resolution of the present NTSC system is described. It is shown that such a system requires more than two channels for transmission. Signal processing techniques are suggested to improve the quality of the images without using any extra channels. Time multiplexing of different frequency bands are used to exploit the psychovisual redundancies of the HVS to reduce the number of pels to be transmitted. Finally, comparing the spatial resolutions of the reconstructed images by a two-channel HDTV system with that of the HVS, it is found that the spatial resolution are not yet as good as that of the HVS

Keywords

high definition television; human factors; signal processing; video signals; visual perception; HDTV transmission; aspect ratio; design; frequency band time multiplexing; human visual system; psychovisual redundancies; recognizability; resolution imbalance; signal processing; spatial-temporal multiplexing; two-channel NTSC-compatible HDTV systems; Design methodology; Frequency; HDTV; Humans; Psychology; Signal processing; Signal resolution; Spatial resolution; TV; Visual system;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.54823

Filename

54823