Multistandard decoder for data stored in the vertical blanking i

Details Multistandard decoder for data stored in the vertical blanking i Multistandard decoder for data stored in the vertical blanking i

1995-05-03

1996-12-31

Kostak, Victor R.

Television

Nonpictorial data packet in television format

348466, 348468, 348473, H04H 7087

Patent

active

055898866

ABSTRACT:
A data decoding device capable of decoding plural kinds of data superimposed in a vertical blanking period of a video signal. The device comprises means for detecting the line number and the intraline position in the vertical blanking period from vertical and horizontal sync signals and generating a line signal extract pulse, a data signal extract pulse and a reference signal extract pulse; binary circuit means for converting the video signal into a binary signal; PLL means for producing a data extract clock signal in synchronism with a clock reference signal extracted on the basis of the line signal extract pulse and the reference signal extract pulse; memory means supplied with the data extract clock signal and the binary signal in response to the line signal extract pulse and the data signal extract pulse, and storing the data signal therein; and control means capable of designating a plurality of durations for generating the respective extract pulses and a plurality of frequency division ratios in the PLL means. In the device, the circuits are usable in common to achieve curtailment in the production cost.

REFERENCES:
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patent: 5045941 (1991-09-01), Davies
patent: 5343300 (1994-08-01), Hennig
IEEE Transactions on Consumer Electronics vol. 38, No. 3, Aug. 1992, New York US pp. 288-295 Shirley James `New Devices for VCR Control Using Teletext Services`.
IEEE 1992 International Conference on Consumer Electronics ICCE 2-4 Jun. 1992 Rosemont (US) pp. 132-133 Stellar et al. `Single Chip Solution For Higher Level World System Teletext`.
IEEE Transactions on Consumer Electronics vol. 38, No. 3, Aug. 1992, New York US pp. 279-284 Manfred Junke `A Multistandard Teletext Processor`.
IEEE Transactions on Consumer Electronics vol. 38, No. 3, Aug. 1992, New York US pp. 268-272 Hiroyasu Shindo et al. `Microcontolers For Closed Caption System` p. 268, left column, line 1-p. 270, right column, line 13.

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