A fully digital convergence system for projection TV

Author

Shiomi, Makoto ; Ohsawa, Michitaka ; Ando, Kunio ; Sakamoto, Toshiyuki ; Yuki, Lkuo ; Ozeki, Koosuke ; Matsumi, Kuninori

Author_Institution

Hitachi Ltd., Yokohama, Japan

Volume

36

Issue

3

fYear

1990

fDate

8/1/1990 12:00:00 AM

Firstpage

445

Lastpage

453

Abstract

A high-precision fully digital convergence system for home-use PTVs (projection televisions) has been developed. The use of digital circuits and the curved-line interpolation technique can reduce the misconvergence to less than 2 mm (it is 4-6 mm in the conventional system). The use of time-division processing in the digital-to-analog converter and the newly developed gate array realizes a low-cost system and reduces the number of variable resistors to 6 (there are 30-45 in a conventional system). The system can handle nonstandard signals reproduced from VCRs, and can also be applied to EDTV, HDTV, and so on

Keywords

colour television receivers; convergence; digital signal processing chips; interpolation; video equipment; curved-line interpolation technique; digital circuits; digital convergence system; digital-to-analog converter; gate array; home-use; low-cost system; projection TV; time-division processing; Brightness; Consumer electronics; Consumer products; Convergence; Costs; Interpolation; Large-scale systems; Resistors; TV; Video equipment;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.103158

Filename

103158