Apparatus for transmitting and backing up video data or image da

Details Apparatus for transmitting and backing up video data or image da Apparatus for transmitting and backing up video data or image da

1995-06-05

1997-08-19

Nguyen, Phu K.

G06F 1500

Patent

active

056596758

ABSTRACT:
A video data transmission arrangement writes video data processed for transmission into a detachable data card. The video data stored in the data card is converted into time-continuous video signals which are processed to enable confirmation of the transmitted video data at the transmitter. Video data can be stored in a video memory and updated at regular time intervals to provide backup and a processor operates to freeze the video data in the video memory upon operation of a freeze switch. The video data stored in the video memory is compressed at each update or when a freeze operation is performed. The compressed video data is stored in a random access memory that is continuously supplied with power from a battery. A compression/expansion circuit reads and expands the compressed video data from the random access memory and delivers the expanded video data to the video memory.

REFERENCES:
patent: 4641263 (1987-02-01), Pearlman
patent: 5220650 (1993-06-01), Barkans

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