Television video signal synchronizing apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 25, 1987
Grant Date -
N/A
app pub date -
Apr 4, 1984
filing date -
Apr 6, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A television video signal synchronizing apparatus, which synchronizes an input television video signal to a reference timing mark. The input video signal is digitized and stored in a memory at locations which are provided by a writing address generator. The writing operation is performed in synchronism with the input video signal. A reading address generator produces reading addresses for reading out the stored video signal to deliver an output television signal which is synchronized to the reference timing mark. The reading address generator is controlled to read out an active video portion of the stored video signal after a delay of about one horizontal scanning period (63.5 microseconds in the NTSC system) immediately after the writing operation of the same active video portion. Thereby 'lip lag' i.e. a mismatch between the audio and video signals, is avoided.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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