Television – Format conversion – Changing number of fields for standard conversion
Patent
1993-03-12
1994-10-11
Groody, James J.
Television
Format conversion
Changing number of fields for standard conversion
348443, H04N 701
Patent
active
053551699
ABSTRACT:
An input digital video signal representing a series of input frames with at least some of the input frames each having a first picture portion having a first acquisition characteristic (such as 60 Hz, 2:1) and a second picture portion having a second acquisition characteristic (such as 30 Hz, 1:1) is processed to produce an output video signal representing a series of output frames having generally the same acquisition characteristic (such as 24 Hz, 1:1). The method comprises the steps of distinguishing between the first and second picture portions in the input frames (for example by determining the difference between input fields (a.sub.1, a.sub.2 ; a.sub.3, a.sub.4 ; . . . ) of a pair, or by detecting a key signal accompanying the input video signal) and processing the first and second picture portions differently to produce the output frames.
REFERENCES:
patent: 3457369 (1969-07-01), Davis et al.
patent: 4862266 (1989-08-01), Gillard
patent: 5187575 (1993-02-01), Lim
David Morgan W. A.
Dorricott Martin R.
Keating Stephen M.
Richards John W.
Burgess Glenton B.
Frommer William S.
Groody James J.
Sinderbrand Alvin
Sony United Kingdom Limited
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