Title :
Teletext equalizer LSI
Author :
Matsue, Hiroshi ; Sakurai, Masaru ; Moromoto, Hiroyuki ; Kawai, Kiyoyuki ; Suzuki, Seigo ; Makino, Takashi ; Asami, Shuji
Author_Institution :
Toshiba Corp., Tokyo, Japan
fDate :
8/1/1988 12:00:00 AM
Abstract :
A large-scale integration (LSI) digital teletext equalizer chip is described that consists of a 13-tap adaptive equalizer and a data regeneration circuit. It achieves high-level performance such as wide equalization range (-0.5-1.5 mu s), short convergence time (1-3 s), good eye height improvement ratio, and high stability. The device greatly improves the teletext receivers performance and extends the service area to such locations where strong ghosts damage the teletext signal. This chip can be easily installed on a teletext decoder board because it does not need any external controller and is functionally independent from the other teletext data processing circuits. The chip can be used with the 525 line/60 Hz NTSC TV system and the 625 line/50 Hz PAL TV system.
Keywords :
digital integrated circuits; equalisers; large scale integration; teletext; -0.5 to 1.5 mus; 1 to 3 s; 50 Hz; 525 line system; 60 Hz; 625 line system; LSI; NTSC TV system; PAL TV system; adaptive equalizer; convergence time; data regeneration circuit; digital teletext equalizer chip; equaliser; equalization range; eye height improvement ratio; ghosts; stability; Adaptive equalizers; Circuit stability; Clocks; Convergence; Data processing; Decoding; Frequency; Interference; Large scale integration; Phase distortion; Sampling methods; TV; Teletext;
Journal_Title :
Consumer Electronics, IEEE Transactions on
