Dynamic magnetic information storage or retrieval – Record editing
Patent
1986-07-15
1988-07-19
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Record editing
360 91, 358 11, 358313, H04N 593
Patent
active
047589000
ABSTRACT:
A field/frame signal conversion method in a magnetic picture recording for use in an electronic still camera and the like is disclosed which prevents the lowering of a SN ratio of a field signal and the occurrence of flicker caused by delaying the field signal. In the field/frame signal conversion method, an operation of delaying the field signal for the field/frame signal conversion as well as for an arithmetic mean operation, performed for the purpose of preventing the occurrence of the V jitter caused by the field/frame signal conversion, is carried out in the frequency modulated condition of the field signal. Then the arithmetic mean operation is performed after the field signal is frequency demodulated and before it is de-emphasized. Thus, it is possible to prevent lowering of the SN ratio of the field signal resulting from the delay operation on the field signal as well as the occurrence of flicker due to a difference in level between an undelayed filed signal and a one-half horizontal scan period delayed field signal produced when performing the field/frame signal conversion.
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Cardillo Raymond F.
Fuji Photo Film Co. , Ltd.
Young W. R.
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