Television – Basic receiver with additional function – Multimode
Patent
1998-04-14
1999-12-07
Kostak, Victor R.
Television
Basic receiver with additional function
Multimode
348558, 348726, 375232, H04N 544
Patent
active
059992239
ABSTRACT:
A radio receiver for receiving a selected DTV signal that can be a quadrature-amplitude-modulation (QAM) signal or a vestigial sideband (VSB) signal synchrodynes the received signal to baseband and supplies the baseband signal to an adaptive equalizer. The presence of the pilot carrier accompanying a selected VSB DTV signal is detected for automatically switching the radio receiver for operation in a VSB signal reception mode, in which operating mode the adaptive equalizer is conditioned to respond to training signals included in the initial data segment of each data field of the VSB signal. The absence of pilot carrier accompanying a selected QAM DTV signal is detected for automatically switching the radio receiver for operation in a QAM signal reception mode, in which operating mode the adaptive equalizer is conditioned to operate without relying on the training signals included in the VSB signal.
REFERENCES:
patent: 5636250 (1997-06-01), Scarpa
patent: 5642382 (1997-06-01), Juan
patent: 5648987 (1997-07-01), Yang et al.
patent: 5666170 (1997-09-01), Stewart
patent: 5684827 (1997-11-01), Nielsen
patent: 5715012 (1998-02-01), Patel et al.
Limberg Allen LeRoy
Patel Chandrakant B.
Bushnell Esq. Robert E.
Kostak Victor R.
Samsung Electronics Co,. Ltd.
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