Method and system for recording asynchronous biphase encoded dat

Details Method and system for recording asynchronous biphase encoded dat Method and system for recording asynchronous biphase encoded dat

1989-02-09

1989-09-19

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Recording for changing duration, frequency or redundant...

358319, 358310, 358 12, 360 51, 360 331, G11B 5008

Patent

active

048686867

ABSTRACT:
A method and system for recording an asynchronous, biphase encoded signal (such as a MIL-STD-1553B signal), having a first data rate, on a video tape recorder, which may be a consumer video tape recorder, and for recovering the encoded recorded data for subsequent transmission in its original format. The asynchronous biphase enceded signal is synchronized with a clock signal having frequency equal to twice the first data rate. The synchronized signal is then stored temporarily in a buffer memory as if it were an NRZ bit stream having bit rate equal to twice the first data rate. The data is read out of memory and combined with television-type synchronization pulses to produce a television-type signal for recording on the VTR. In the play back mode, the recorded VTR signal is separated into its data component (which consists of bursts of data that occupied the active video areas) and sync component. The invention eliminates the need to use specially designed recorders for asynchronous biphase encoded signals. Such specially designed recorders are ty pically expensive and have limited available record time.

REFERENCES:
patent: 3878335 (1975-04-01), Baloban
patent: 4122477 (1978-10-01), Gallo
patent: 4464679 (1984-08-01), Wargo
patent: 4635138 (1987-01-01), Louth
patent: 4794453 (1988-12-01), Gnuechtel

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