Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1988-12-15
1991-09-17
McElheny, Jr., Donald
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
H04N 5782
Patent
active
050500104
ABSTRACT:
A dual video signal simultaneous recording system for a VCR in which two different source video signals are simultaneously recorded on one video tape. The system includes two additional video heads on the head drum each kept within angles of 90.degree. relative to the existing heads. A second video signal is fed to the additional video heads while keeping a predetermined delay period of time interval relative to a first video signal fed to the existing video heads. The system includes a first record system, synchronous separators, a gate array, an analog/digital converter, switches, field memories, a digital/analog converter, and a second record system. The system is also characterized in that the gate array outputs switching control signals, memory control signals, and conversion control signals derived from a head switching signal, a record signal, and synchronous signals. Furthermore, the azimuth angles of the additional video heads are different than the azimuth angles of the existing heads, so that two different source video signals input simultaneously can be recorded on one video tape by one video recorder and player.
REFERENCES:
patent: 3991266 (1976-11-01), Baer
patent: 4027333 (1977-05-01), Kaiser et al.
patent: 4139868 (1979-02-01), Eisenberg et al.
patent: 4656527 (1987-04-01), Uchimi
patent: 4774597 (1988-09-01), Harvey
Goldstar Co. Ltd.
McElheny Jr. Donald
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