Television – Synchronization – Locking of video or audio to reference timebase
Patent
1992-08-24
1995-01-03
Kostak, Victor R.
Television
Synchronization
Locking of video or audio to reference timebase
348714, 345203, 360 351, H04N 5907
Patent
active
053790731
ABSTRACT:
An image signal processing device is arranged to receive an input image signal including horizontal and vertical synchronizing signals; to make a discrimination on the basis of the horizontal and vertical synchronizing signals, as to whether a period of the input image signal is less than a predetermined period or not; then, in accordance with information on the result of the discrimination, to cause a memory to store only a part of the input image signal corresponding to the predetermined period if the period of the input image signal is not less than the predetermined period; and if the period of the input image signal is less than the predetermined period, to cause the memory to complement the input image signal with a predetermined signal for a period by which the period of the input image signal is less than the predetermined period and store the complemented image signal. This arrangement enables the device to give a stable still image without any turbulence at the time of reproduction, irrespective of whether the input image signal is a noninterlaced image signal or an interlaced image signal and whether the recording and reproducing method is a field recording and reproducing method of a frame recording and reproducing method.
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Kosugi Masato
Sakaegi Yuji
Canon Kabushiki Kaisha
Kostak Victor R.
Murrell Jeffrey S.
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