Redundantly and asynchronously recording an information signal

Details Redundantly and asynchronously recording an information signal Redundantly and asynchronously recording an information signal

1983-12-23

1985-10-22

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Recording for changing duration, frequency or redundant...

360 18, 360 24, 360 32, G11B 500, G11B 1502

Patent

active

045492301

ABSTRACT:
In recording an analog signal using two recording heads equally-spaced on a rotating drum, a magnetic tape is wrapped about a guide drum over an angular extent of 90.degree., so that there are recording periods when a head is tracing the tape and periods when no head is tracing the tape. The analog signal to be recorded is converted to a pulse-code-modulated (PCM) digital signal in real-time periods which are longer than the recording periods during which a head traces the tape. The PCM signals are time-base compressed to be slightly less than the rotary head contact interval and additional data such as parity data and cyclic redundancy check codes are added to the PCM signals to form a composite signal, which is written back into a memory system. The time-base compressed composite signal is then read out repeatedly from the memory over one contact interval and supplied to the recording heads so that in the tracks formed by the heads on the tape the composite data appears more than once in each track, that is, slightly overlapped, thereby preventing dropouts and permitting the signal to be recorded on the tape by the head without accurately detecting the rotary phase of the recording head.

REFERENCES:
patent: 4224642 (1980-09-01), Mawatari et al.
patent: 4227221 (1980-10-01), Kanazawa
patent: 4328580 (1982-05-01), Stockman, Jr. et al.
patent: 4446490 (1984-05-01), Hoshina et al.
patent: 4463387 (1984-07-01), Hashimoto et al.
patent: 4477844 (1984-10-01), Nakano et al.

Affiliated with

Also associated with

Rating

Redundantly and asynchronously recording an information signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Redundantly and asynchronously recording an information signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redundantly and asynchronously recording an information signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-125212