Simultaneous write/read control apparatus for first-in-first-out

Details Simultaneous write/read control apparatus for first-in-first-out Simultaneous write/read control apparatus for first-in-first-out

1995-02-17

1997-07-08

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

With details of static storage device

345200, H04N 964

Patent

active

056467001

ABSTRACT:
A simultaneous write/read control apparatus for a FIFO memory simultaneously controls write and read operations of video data constituting a video frame with an odd field and an even field. A control portion controls the write and read operations of the video data with respect to the FIFO memory and generates a first write enable signal. An unwritten interval signal generator uses information used for controlling the FIFO memory and generates an unwritten interval signal for preventing the video data from being written in the FIFO memory. A second write enable signal generator receives the first write enable signal and the unwritten interval signal from the control portion, and generates a second write enable signal which causes the input video data not to be written in the FIFO memory during an unwritten interval designated by the unwritten interval signal and causes the input video data to be written in the FIFO memory during the other intervals. The second enable signal is supplied to the FIFO memory. Thus, the data reading problems due to the features of the FIFO memory can be solved and the normal picture can be displayed on a screen.

REFERENCES:
patent: 4386367 (1983-05-01), Peterson et al.
patent: 4445135 (1984-04-01), Heitmann et al.
patent: 5124790 (1992-06-01), Nakayama
patent: 5412481 (1995-05-01), Ko et al.
patent: 5452010 (1995-09-01), Doornink
patent: 5530458 (1996-06-01), Wakasu

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