The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2010
Filed:
Feb. 16, 2006
John Michael Hayden, Allen, TX (US);
Bing Ouyang, Plano, TX (US);
Troy Lane Ethridge, Bedford, TX (US);
Anuradha Sundararajan, Plano, TX (US);
Larry D. Dickinson, Richardson, TX (US);
John Michael Hayden, Allen, TX (US);
Bing Ouyang, Plano, TX (US);
Troy Lane Ethridge, Bedford, TX (US);
Anuradha Sundararajan, Plano, TX (US);
Larry D. Dickinson, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method and apparatus for an analog-to-digital video signal converter. The converter is controlled by a clock with controllable frequency and phase for sampling an analog signal. A measure of the difference between successive frames of the image is computed for a sequence of clock phases. The measure can be a count taken over pixels of the magnitude of the difference between a pixel in one frame and the corresponding pixel in a following frame exceeding a threshold value. The frequency of the clock is verified using a characteristic of the frame difference. The characteristic can be the ratio of the maximum measure to the minimum measure over the selected clock phases. Other characteristics can be used such as a difference of a maximum and a minimum measure.