Error Correction System for PAL-TV Teletext

摘要

Japanese teletext uses a powerful error correction system known as BEST (Burst and random Error correction System for Teletext), for the NTSC-TV system. It was considered of primary importance that technology capable of transmitting data reliably be developed, since Chinese character codes, which contain more information than alphabetic character codes, must be transmitted in Japanese sentences. Recently, a novel error correction system, in which BEST can be multiplexed with PAL-TV signals, has been invented for teletext for China which uses Chinese characters, while developing devices for transmission and reception. Using these devices, indoor and outdoor experiments were carried out in cooperation with the Chinese Ministry of Radio, Film and TV.