JPH02207637A - Picture stuff control circuit - Google Patents

Abstract

PURPOSE: To realize the stuffing by plural bits with the unit of arbitrary bit by monitoring a write address at the timing of a read address of a memory for stuffing being digital quantity, and generating a stuff control signal from the digital arithmetic result of the address value.

CONSTITUTION: An input picture signal is stored to a memory 1 for stuff by a writing clock and converted to a transmission rate by being read according to a reading clock. The address control of the memory 1 for stuff is executed by an address arithmetic circuit 3. A write address counter 32 counts the write address in the internal part of the memory for stuff and a read address counter 33 counts the read address. Both pieces of address information are sent to an address computing element 31 and as the result of the arithmetic, a stuff position is detected. Then, a control signal is sent to a stuff information marking circuit 4. Thus, the signal processing of a stuff control circuit is digitally executed and the stuff can be controlled by the plural bits with the unit of arbitrary bit.

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