Video standards conversion

Details Video standards conversion Video standards conversion

1992-07-01

1994-04-12

Kostak, Victor R.

Television

Format conversion

Conversion between standards with different aspect ratios

346704, H04N 701

Patent

active

053030443

ABSTRACT:
A digital video signal is real-time converted from a high definition format, such as 1125 lines, 60 field/s, 2:1 interlace, with a 16:9 aspect ratio and 1920.times.1035 active pixels to a conventional definition format, such as 525 lines, 60 field/s, 2:1 interlace, with a 4:3 aspect ratio and 720.times.486 active pixels.
The image is compressed so that the active area extends across only part of an intermediate field/frame.
The pixels are written of the high definition fields to alternate field stores at the high definition format pixel rate.
The output frames are formed in the conventional definition format by reading, at the conventional definition pixel rate, pixels of at least part of the active portion from the field store which is not being written.

REFERENCES:
patent: 4163249 (1979-07-01), Michael et al.
patent: 5136398 (1992-08-01), Rodriguez-Cavazos et al.

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