Video format conversion process and apparatus

Details Video format conversion process and apparatus Video format conversion process and apparatus

1995-12-21

1998-08-18

Kostak, Victor R.

Television

Format conversion

Changing number of fields for standard conversion

348443, H04N 701

Patent

active

057964394

ABSTRACT:
A method and apparatus is provided for converting the frame rate of digital video data from one frame rate to another frame rate without introducing motion artifacts into the converted video data stream. A high frame rate video stream is converted into a lower frame rate video stream by selecting whole frames from the high frame rate video stream and outputting the selected frames as the lower frame rate video stream. To insure that only whole frames are selected from the high frame rate video stream, the frame rate of the high frame rate video stream is locked to the frame rate of the lower frame rate video stream. A frame cycle is defined to be an integer number of frames in the higher frame rate stream. The higher and lower frame rates are locked by repeatedly selecting and outputting as the lower frame rate video stream, over a time period that is substantially equal to one frame cycle, an integer number of frames from each frame cycle of the higher frame rate.

REFERENCES:
patent: 4523227 (1985-06-01), Hurst
patent: 5404170 (1995-04-01), Keating

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