Title :
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
fDate :
8/1/1990 12:00:00 AM
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;
Journal_Title :
Consumer Electronics, IEEE Transactions on
