Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1994-01-27
1996-10-15
Tran, Thai Q.
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
348468, H04N 576, H04N 700, H04N 1100
Patent
active
055659977
ABSTRACT:
An arrangement for recording data, such as for example, teletext data, on standard domestic video recorders includes a teletext decoder and a microprocessor. The teletext decoder acquires selected teletext pages and passes them from its memory to the microprocessor over a bus as original standard teletex data packets. The microprocessor converts a teletext data packet into a plurality of data blocks, each of which is expanded to occupy a majority of an active line period. Thus the instantaneous data rate is reduced. The expanded data blocks are passed to video recorder circuitry via a shift register and switch. On replay, the microprocessor generates synthetic page and row headers to enable the teletext decoder to acquire data blocks from recording medium in the video recorder, as though the data blocks were standard teletext packets. The data blocks are then stored in the decoder memory and subsequently accessed by the microprocessor over the bus for conversion back to the original standard teletext data packets. These teletex data packets may then be fed to an associated television receiver or used for other purposes.
REFERENCES:
patent: 5237412 (1993-08-01), Nakajima
Hirashima, "Teletext Receiver --A Circuit Design of the Sampling Clock Regeneration", 1980.
"Computer Controlled Teletext" J. R. Kinghorn, Electronic Components And Applications, vol. 6, No. 1, 1984.
"EBU Subtitling Data Exchagne Standard" A. AHL, EBU Technical Review, Summer, 1992P. 45-49.
Lee Y.
Stephens Debra K.
Tran Thai Q.
U.S. Philips Corporation
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