×

Method and system for high density analog data storage retrieval, and transmission

  • US 5,006,936 A
  • Filed: 11/02/1988
  • Issued: 04/09/1991
  • Est. Priority Date: 11/27/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A bulk analog data storage system comprising:

  • (a) first means for receiving a continuous analog video input signal;

    (b) first sample and hold means coupled to said receiving means for sampling said input data at a first clock rate;

    (c) first analog-to-digital converter means for converting each of said samples to a digital code;

    (d) first and second digital memory means;

    (e) first gating means coupled to said first and second memory means for alternately providing digital coded samples of said input data to said first and second memory means;

    (f) first clock means coupled to said first sample and hold means and to said first and second memory means for clocking said memory means at said first clock rate when data is being written into said memory means;

    (g) second gating means coupled to said first and second memory means for multiplexing the digital coded samples of said input data as such data is alternately read from said memory means;

    (h) second clocking means for clocking said first and second memory at a second clock rate which is of a higher frequency than said first clock rate;

    (i) first digital-to-analog converter means for converting the digital coded samples as they are read from said second gating means into an analog formatted signal;

    (j) first interval generator means for generating intervals of duration of a sync/blanking pulse for a selected video format, said intervals being at a repetition rate much lower than said first and second clock rates;

    (k) third gating means coupled to said first interval generator and to said second clocking means for inhibiting said second clocking signal to the memory means selected by said second gating means during the generated interval, said inhibiting being for a limited period of time so that the inhibiting of the second clocking signal does not result in overwriting of data in said memory means before said data is read from a memory means;

    (l) a sync/blanking format generator for generating sync/blanking pulses for said selected video format;

    (m) fourth gating means coupled to said first digital-to-analog converter means and to said sync/blanking format generator for multiplexing the analog formatted signal and the sync/blanking interval into a video signal of said selected video format; and

    (n) recorder means for recording said video signals in said selected video format.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×