Digital cursors for serial digital television waveform monitors

Details Digital cursors for serial digital television waveform monitors Digital cursors for serial digital television waveform monitors

1996-04-25

1999-09-07

Peng, John K.

Television

Image signal processing circuitry specific to television

Special effects

348185, 348177, 345134, 345157, H04N 976

Patent

active

059494956

ABSTRACT:
Generation of digital cursors for serial digital television waveform monitors includes inputting hexadecimal values for the cursors by an operator via a front panel. The hexadecimal values are received by a microprocessor which loads them into appropriate registers of a co-processor. The outputs of the cursor registers in the co-processor are input to respective inputs of a multiplexer together with a digital signal representing a serial digital television signal. A select signal for the multiplexer is generated by a selection circuit that is enabled by a digital cursor ON command when the waveform monitor is in a cursor mode. The selection circuit at predetermined locations of the digital signal generates the select signal so that the appropriate cursor values are inserted into the digital signal at those locations. The processed digital signal from the co-processor is then converted to analog, filtered, and displayed on a display device to present a waveform representing the serial digital television signal together with the digital cursors.

REFERENCES:
patent: 4766425 (1988-08-01), Tallman
patent: 5039937 (1991-08-01), Mandt
patent: 5075618 (1991-12-01), Katayama
patent: 5247287 (1993-09-01), Jonker
patent: 5250935 (1993-10-01), Jonker
patent: 5742275 (1998-04-01), Ozawa
"The Measurement of Digital Television Signals" Viewtronics Ltd. 1991.

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