Television – Basic receiver with additional function – Multimode
Patent
1995-06-26
1998-11-10
Powell, Mark R.
Television
Basic receiver with additional function
Multimode
348555, 348556, H04N 546
Patent
active
058351574
ABSTRACT:
A multi-system video signal demodulating apparatus includes at least a color signal processing unit and a color discriminating function for demodulating a component video signal from video signals of two or more different systems. The multi-system video signal demodulating apparatus includes a detector for detecting continuity between vertical synchronizing signals of the input video signals. The color discriminating function is executed when the detector detects a discontinuity between the vertical synchronizing signals. The continuity between the vertical synchronizing signals of the input video signals is detected. The color discriminating function is executed when a discontinuity between the vertical synchronizing signals is detected during continuity detection. A synchronizing signal of an input video signal is discriminated. A frequency of a color burst signal is discriminated based on a result of the synchronizing signal discrimination. The color burst discrimination is executed or stopped based on a result of the color burst discrimination. An amplitude of the color burst is discriminated based on a result of the synchronizing signal discrimination. A phase of the color burst is discriminated based on a result of the amplitude detection. A television system of the video signal is discriminated based on a result of the phase detection. An oscillation frequency of the crystal oscillator is discriminated based on a discriminated result of the television system discrimination.
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Miyagawa Masayuki
Miyazaki Shinichirou
Shirahama Akira
Maioli Jay H.
Powell Mark R.
Sony Corporation
Srivastava Vivek
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