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Video processing system using multi-head disc store

  • US 4,688,106 A
  • Filed: 02/11/1985
  • Issued: 08/18/1987
  • Est. Priority Date: 03/29/1984
  • Status: Expired due to Term
First Claim
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1. A video signal processing system comprising:

  • disc store means having a plurality of storage discs having the combined capacity for storing video signals for a relatively large number of pictures and having a plurality of groups of transducing heads to selectively read and write video signals in predetermined picture storage positions on the storage discs and circuit means for rendering the heads of a selected group operable in parallel for video signals in bit serial mode;

    frame store means comprising a plurality of framestores having the capacity for storing video signals in bit parallel mode for a relatively small number of pictures;

    a first transfer channel for transferring sequential video signals having a predetermined pixel frequency from an external circuit to said frame store means, and vice versa;

    said framestores being each arranged for parallel reading and writing in a plurality of address locations thereof equal in number to the number of heads in a group;

    a highway having a plurality of channels and circuit means for connecting the heads in a selected group via said channels to the respective addresses of a selected framestore in parallel and for reading video signals from said framestore and applying them to respective heads and vice versa, wherein the signals for said highway are converted from bit parallel to bit serial mode or vice versa as required, and video signals can be transferred at such a rate as to enable the transfer of a picture to or from the disc store means in a time not exceeding that required to transfer a picture in said first channel.

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