Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1995-03-27
1997-07-01
Psitos, Aristotelis
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
360 722, 386 65, G11B 2732
Patent
active
056446756
ABSTRACT:
A time coding system of high resolution for a digital audio and video recording system is disclosed. Various methods of structuring: time code for recording are disclosed which enable time code reading at high tape transport speeds to facilitate automatic search/forward and reverse. A time and control code generator for video recording and replay use comprises a pulse generator generating a pulse having a television frame frequency repetition rate. A source of a time code signal is related to the television frame frequency, and comprises data bits representing hours minutes seconds and frames. A pulse position modulation means is coupled to the pulse and in response to the data its representing hours minutes seconds, modulates a trailing edge of the pulse to a first position responsive to the data bits having a logical 1 value and modulates the trailing edge to a second position responsive to the data bits having a logical 0 value. A generating is means coupled to the data bits representing frames and generates a first signal frequency responsive to the frame data bits having a logical 0 value and a second signal frequency responsive to the frame data bits having a logical 1 value. The second frequency is double the first frequency. The first and second frequencies are added symmetrically to the trailing edge to maintain the modulated positions.
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Communication Systems: Carlson: McGraw-Hill .COPYRGT. 1968, pp. 296-299.
Kaaden Jurgen
Mahr Peter
Reiner Gerhard
Davenport Francis A.
Deutsche Thomson-Brandt GmbH
Laks Joseph J.
Psitos Aristotelis
Tripoli Joseph S.
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