Optimized sampling and bit rates of digital NTSC picture codes based on subjective evaluation of reproduced pictures

Author

Asada, Hideyuki ; Ikeda, Hiroaki ; Shimodaira, Yoshifumi ; Yoshida, Hirofumi

Author_Institution

Shizuoka Nippon Electr. Corp., Kakegawa, Japan

Volume

42

Issue

3

fYear

1996

fDate

8/1/1996 12:00:00 AM

Firstpage

768

Lastpage

775

Abstract

This paper describes optimized digital NTSC picture coding in which circuit and system configurations are simplified by lowering the sampling frequency and quantizing level. The sampling frequency and quantizing level are determined based on the subjective evaluation of the reproduced picture quality. In accordance with the result of the subjective evaluation, the digital NTSC picture containing one third of the information as compared with that of the normal digital NTSC picture was found to be satisfactory. Although the digital NTSC picture coding system normally uses a sampling frequency of 4× fsc (fsc: the color subcarrier frequency of the NTSC system) with a quantizing level of 8 bits, the subjective evaluation leads to the result of a sampling frequency of 2.28× fsc with a quantizing level of 5 bits

Keywords

image reconstruction; optimisation; quantisation (signal); video coding; 5 bit; 8 bit; circuit configurations; color subcarrier frequency; digital NTSC picture codes; optimized bit rates; optimized sampling; picture coding; quantizing level; reproduced picture quality; reproduced pictures; sampling frequency; subjective evaluation; system configurations; Analog-digital conversion; Bit rate; Circuits and systems; Clocks; Code standards; Frequency conversion; Home appliances; National electric code; Power capacitors; Sampling methods;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.536183

Filename

536183