Television – Receiver circuitry – Automatic frequency control
Patent
1998-12-18
1999-12-14
Hsia, Sherrie
Television
Receiver circuitry
Automatic frequency control
348731, 348738, H04N 550
Patent
active
060024518
ABSTRACT:
An automatic tuning apparatus is capable of automatically switching a tuning mode of a tuner circuit, automatically arranging various signal data in or after completion of tuning and arbitrarily and automatically arranging various signal data by a user. The apparatus comprises a SYNC discrimination circuit (11) for discriminating whether or not a video signal system is a NTSC system or another system, a tuning mode switching circuit (12) for switching a tuning mode, and a color discrimination circuit (13) for receiving a color burst signal (identic signal) for discriminating whether the video signal system is a PAL system or a SECAM system. As to the NTSC system, the PAL system, the SECAM system and a SECAM-L system, the user may not set the tuning mode of tuning means, whereby an automatic tuning apparatus imposing no burden on the user can be provided.
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Arikane Noboru
Hamada Jun-ichi
Hongoh Kimitoshi
Okugawa Isamu
Shimamoto Katsushi
Hsia Sherrie
Mitsubishi Denki & Kabushiki Kaisha
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