System for storage and retrieval of video information on a cycli

Details System for storage and retrieval of video information on a cycli System for storage and retrieval of video information on a cycli

1975-06-02

1976-12-28

Cardillo, Jr., Raymond F.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

178DIG22, 3401725, 360 19, 360 72, H04N 578, G11B 2730, G11B 2732

Patent

active

040005100

ABSTRACT:
A magnetic disc has a plurality of video track segments for storing distinct fields of video information. A look-up track is provided on the disc and segmented to store indirect address data which may be represented by random numbers, and which are related to the video information fields. Both the look-up track segments and the video track segments are numbered sequentially. Each video track segment is permanently associated with a look-up track segment.
A movable transducer is associated with both the video tracks and the look-up track. A counter circuit is provided to indicate periodically the instant look-up segment numbers with respect to the instant position of the rotating cyclical storage device and in synchronism therewith. A first comparator circuit compares an indirect address input request with the indirect addresses recorded on the look-up track. Responsive to an output from the first comparator circuit, a buffer circuit stores an instant look-up segment number and transfers it to a control circuit. A control signal from the control circuit is sent to a transducer positioning device which moves the transducer to the corresponding video track segment.
A look-up decoder circuit is designed to sense a first empty segment automatically and periodically. A new video picture information is stored on the video track segment corresponding to that first empty look-up track segment.
Data bits are stored on the back porch of the horizontal sync pulses on consecutive lines of the video information. A circuit is provided to extract these data bits and restore the look-up track if accidentally erased.

REFERENCES:
patent: 3599178 (1971-08-01), Jackson
patent: 3614333 (1971-10-01), Iwata
patent: 3631421 (1971-12-01), Perkins
patent: 3637928 (1972-01-01), Poulett
patent: 3740463 (1973-06-01), Youngstrom et al.
patent: 3743793 (1973-07-01), Emerson
patent: 3745264 (1973-07-01), Emerson
patent: 3748381 (1973-07-01), Strobele et al.
patent: 3792194 (1974-02-01), Wood et al.
patent: 3931457 (1976-01-01), Mes

Affiliated with

Also associated with

Rating

System for storage and retrieval of video information on a cycli does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for storage and retrieval of video information on a cycli, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for storage and retrieval of video information on a cycli will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-151836