Television – Format conversion – Involving both line number and field rate conversion
Patent
1992-12-04
1995-04-04
Kostak, Victor R.
Television
Format conversion
Involving both line number and field rate conversion
348454, 348458, H04N 701, H04N 1120
Patent
active
054041694
ABSTRACT:
A scanning line converting apparatus for converting between NTSC and PAL formats includes a plurality of line memories, an arithmetic circuit and a picture memory. Switches in the lines connecting these elements permits the order of connection to be shifted between first and second states. When converting from the PAL system to the NTSC system, 5 lines are formed by varying the mutual signal ration of 2 lines for every 6 lines, while, when converting from the NTSC system to the PAL system, 6 lines are formed by varying the ratio of 2 lines for every 5 lines, thereby making it possible to convert the lines of one field of different broadcasting methods when actually scanning the picture tube. The ratios used in computations performed by the arithmetic circuit are related to horizontal synchronizing signals and to vertical blanking signals, while they are also related to constants which are furnished by a percent block. A method for converting between different broadcasting formats is also described.
REFERENCES:
patent: 4057835 (1977-11-01), Kinuhata
patent: 4617597 (1986-10-01), Lippel
patent: 4694337 (1987-09-01), Lyons
R. E. Davies "Full Screen TV Standards Converter" Wireless World, Jan. 1969.
K. H. Barratt and J. H. Tayler "Line Interpolation" IBA Tech Rev. GB No. 8 Sep. 1976.
Flynn Nathan J.
Kostak Victor R.
Samsung Electronics Co,. Ltd.
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