Video test method and apparatus with incremental scan rate...

Details Video test method and apparatus with incremental scan rate... Video test method and apparatus with incremental scan rate...

H - Electricity

04

N

350/1

H04N 17/02 (2006.01) H04N 17/04 (2006.01)

Patent

CA 1196416

Disclosure 247-82-0080 ABSTRACT A video test pattern generator is able to be incrementally adjusted in its number of lines and in its line resolution, and at the same time is able to produce a reference frequency. The reference frequency is established at a selected value and offset from the selected value by an amount necessary to coincide with a multiple of a scan line frequency. This can be accomplished despite changes in scan rate and raster pattern. A stroke generation capability is provided and the system can be utilized with programmable character generation and can produce a high-resolution image with a minimum of hardware. Further advantages include the ability of the system to adapt to new or changed equipment to be tested.

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