Dynamic magnetic information storage or retrieval – Manual input recording
Patent
1978-10-16
1980-01-08
Cardillo, Jr., Raymond F.
Dynamic magnetic information storage or retrieval
Manual input recording
360 24, 360 27, 360 33, 360 36, 360 37, H04N 579, H04N 5795
Patent
active
041830652
ABSTRACT:
Apparatus for directly recording television signals on a magnetic medium strips out sync and blanking information. Low frequency components of the television signals are time compressed, i.e. frequency shifted, and recorded as a substitute for the stripped-out sync and blanking information. Thus, high frequency components of each video line are recorded, followed by that line's low frequency components, thereby facilitating the playback of low frequency information. In time compressing the low frequency information, the video signal content of a line is sampled at a predetermined rate. Each sample is then quantized for purposes of improving the playback signal-to-noise ratio, i.e. the effect of tape modulation, and other, noise is nullified by sample quantization. And, to cut the bit rate resulting from sample quantization, a preferred form of the invention groups the quantized bits and records analog representations of the bit groups.
REFERENCES:
patent: 2850574 (1958-09-01), Krelzner
patent: 3726993 (1973-04-01), Lavalee
patent: 3781463 (1979-12-01), Van den Bussche
Granger Edward M.
Metildi Frederic H.
Rhody Harvey E.
Cardillo, Jr. Raymond F.
Cody Robert F.
Eastman Kodak Company
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