Television – Basic receiver with additional function – Multimode
Patent
1998-03-09
2000-11-14
Kostak, Victor
Television
Basic receiver with additional function
Multimode
348738, 348726, H04N 546
Patent
active
061477133
ABSTRACT:
A television converter uses digital signal processing (DSP) to provide compatibility with different television standards including NTSC and PAL video standards and FM, BTSC, DIN, Home Theatre, NICAM and independent digital audio standards. Audio processing is accomplished without passing the audio through a Nyquist filter used for video. This eliminates AM to PM conversion improving luminance linearity and differential gain and phase. It also prevents video information from phase modulating the audio intercarrier, thereby eliminating video "buzz" components in the audio. The audio processing includes a synchronous FM demodulator and a separate synchronous FM/QPSK demodulator for handling the different audio standards. Handling historical analog TV standards with DSP also enables the advantageous combination of analog and digital television reception within a single digital VLSI ASIC.
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Fazili Muhammad
Friedman Robert
Robbins Clyde
General Instrument Corporation
Hoppin Ralph F.
Kostak Victor
Lipsitz Barry R.
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