Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1991-08-06
1993-05-11
Sniezek, Andrew L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
360 191, 360 381, H04N 979, H04N 578
Patent
active
052106187
ABSTRACT:
When, for example, MAC (multiplexed analog components) signals (inter alia C-MAC or D2-MAC signals) are recorded directly on a video recorder and no special steps are taken, information will be lost as a result of the change-over from recording by one write head to recording by another write head. The relevant signals to be recorded include a sequence of lines with a first signal block containing a line-synchronizing signal and at least one additional signal, and a second signal block containing the chrominance luminance information of the video signal. Specific first signal blocks or at least the additional signals of these first signal blocks are accommodated in a second signal block of a non-relevant video line and are subsequently recorded on the record carrier. After the relevant second signal block has been read from the record carrier, the relevant first signal blocks, or at least the additional signals of these first signal blocks, are extracted from the second signal block and re-inserted into the data stream of first signal blocks at their original locations. The relevant first signal blocks may be those first signal blocks during which the heads are switched or may be other (subsequent, with respect to time) first signal blocks which can no longer be inserted into the data stream of the first signal blocks because these first signal blocks, during which head switching is effected, have been repeated earlier in the data stream.
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D2-MAC and Its Consequences, Tetzner et al. Funkschau No. 18 1985 pp. 59-63.
Goodman Edward W.
Sniezek Andrew L.
U.S. Philips Corporation
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