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:
Mar. 03, 2009
Filed:
Mar. 17, 2005
Daniel Gudmunson, Dripping Springs, TX (US);
John Melanson, Austin, TX (US);
Rahul Singh, Austin, TX (US);
Ahsan Chowdhury, Austin, TX (US);
Daniel Gudmunson, Dripping Springs, TX (US);
John Melanson, Austin, TX (US);
Rahul Singh, Austin, TX (US);
Ahsan Chowdhury, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A method and system for synchronizing video information derived from an asynchronously sampled video signals provide a mechanism for using asynchronous sampling in the front-end of digital video capture systems. A ratio between the sampling clock frequency and the source video clock frequency is computed via an all digital phase-lock loop (ADPLL) and either a video clock is generated from the ratio by another PLL, a number to clock converter or the ratio is used directly to provide digital synchronization information to downstream processing blocks. A sample rate converter (SRC) is provided in an interpolator that either acts as a sample position corrector at the same line rate as the received video, or by introducing an offset in the ADPLL, the video data can be converted to another line rate via the SRC.