Accession Number : ADD015661

Title :   Video Scan Rate Conversion Method and Apparatus for Achieving Same.

Descriptive Note : Patent, Filed 1 Aug 91, patented 1 Dec 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Mills, George T

Report Date : 01 Dec 1992

Pagination or Media Count : 9

Abstract : In a video system, a video signal operates at a vertical scan rate to generate a first video frame characterized by a first number of lines per frame. A method and apparatus are provided to convert the first video frame into a second video frame characterized by a second number of lines per frame. The first video frame is stored at the vertical scan rate as digital samples A portion of the stored digital samples from each line of the first video frame are retrieved at the vertical scan rate. The number of digital samples in the retrieved portion from each line of the first video frame is governed by a ratio equal to the second number divided by the first number, such that the retrieved portion from the first video frame is the second video frame.

Descriptors :   *VIDEO FRAMES, *VIDEO SIGNALS, *OPTICAL SCANNING, RATES, RATIOS, PATENTS, INFORMATION RETRIEVAL

Subject Categories : Optical Detection and Detectors
      Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE