Television – Bandwidth reduction system – Format type
Patent
1995-11-13
1997-02-18
Kostak, Victor R.
Television
Bandwidth reduction system
Format type
348726, 348538, 375355, 375371, H04N 7015
Patent
active
056045417
ABSTRACT:
A HDTV receiver which is improved in its overall performance and is simplified in its configuration, by improving a symbol timing restoring circuit, includes a tuner for selecting a necessary channel from input signals via an antenna, an IF processing & carrier restoring portion for performing an IF process & carrier restoration from the output of the tuner, an analog-to-digital converter (ADC) for converting the output of the IF processing & carrier restoring portion into a digital signal, a timing restoring portion for restoring a timing from the output of the ADC, a 2:1 down-sampler for 2:1 down-sampling the output of the ADC, a sync detector for detecting a sync from the output of the 2:1 down-sampler, a channel equalizer for performing a channel equalization from the output of the 2:1 down-sampler, a phase controller for correcting the phase error from the output of the channel equalizer, an optimal viterbi decoder for performing a viterbi decoding operation from the output of the phase controller, a deinterleaver for dissipating the output of the optimal viterbi decoder in order to enhance the correction capability due to burst errors, an error controller for performing a Reed-Solomon decoding operation with respect to the output of the deinterleaver, and a derandomizer for releasing the output of the error controller and restoring a signal randomly formed at a transmission port reversely.
REFERENCES:
patent: 4503453 (1985-03-01), Rougeolle
patent: 5363408 (1994-11-01), Polk et al.
patent: 5425060 (1995-06-01), Roberts et al.
patent: 5479449 (1995-12-01), Patel et al.
patent: 5535252 (1996-07-01), Kokayashi
"VSB Transmission System", Zenith Electronics Corporation, Dec. 17, 1993, pp. 8-16, FIGS. 9, 12, 14.
Kim Dae-Jin
Kim Key H.
Kim Yung G.
Park Hee B.
Park Jong S.
Kostak Victor R.
LG Electronics Inc.
Murrell Jeffrey S.
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