Data simulation in sector scan imaging systems

Details Data simulation in sector scan imaging systems Data simulation in sector scan imaging systems

1980-07-30

1982-01-12

Britton, Howard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

73618, 358112, 358138, 364515, H04N 718

Patent

active

043108539

ABSTRACT:
Encoded data is sequentially read into a shift register having a number of stages larger than the largest inter-scan "void" or "hole" to be filled. A priority encoder determines the length of the void to be filled, and the amplitude difference of successive scan data samples is evaluated. For each display picture element in the void, a weighting select PROM determines an appropriate weighting factor, based on the size of the void to be filled. Separate positive differential and negative differential memories are thereby energized to produce, for each display picture element in the hole, a simulated display picture data element.

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