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A Method of Automatically Searching the Sampling Frequency and Sampling Phase for Graphic Digitizer in Pixelated Display Applications

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Abstract:

When analog red, green, blue (RGB) signals of a video/graphic image need to be displayed on pixelated display devices, graphic digitizers have to be utilized to convert the analog signals to digital signals. In such an application choosing correct sampling frequency for the digitizers is essential since an incorrect frequency will impair the recovery of images encoded in the analog signals. This article presents an algorithm that searches automatically for the sampling frequency. The phase of the sampling clock is also critical since inadequate phase control can create undesirable visible artifacts. Thus, a second algorithm for automatically searching for the appropriate sampling phase is presented in this article as well. These algorithms can be applied in pixelated display applications.

Document Type: Research Article

DOI: http://dx.doi.org/10.2352/J.ImagingSci.Technol.(2006)50:1(80)

Affiliations: Texas Instruments Incorporated, Dallas, Texas 75243

Publication date: January 1, 2006

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  • The Journal of Imaging Science and Technology (JIST) is dedicated to the advancement of imaging science knowledge, the practical applications of such knowledge, and how imaging science relates to other fields of study. The pages of this journal are open to reports of new theoretical or experimental results, and to comprehensive reviews. Only original manuscripts that have not been previously published, nor currently submitted for publication elsewhere, should be submitted.
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