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:
Jul. 31, 2012
Filed:
May. 08, 2008
Matthew Rabinowitz, Portola Valley, CA (US);
James J. Spilker, Jr., Woodside, CA (US);
Scott Furman, Menlo Park, CA (US);
Dimitri Rubin, Cupertino, CA (US);
Harvind Samra, Fairfield, CA (US);
David Burgess, Fairfield, CA (US);
Guttorm Opshaug, Menlo Park, CA (US);
Jim Omura, San Francisco, CA (US);
Matthew Rabinowitz, Portola Valley, CA (US);
James J. Spilker, Jr., Woodside, CA (US);
Scott Furman, Menlo Park, CA (US);
Dimitri Rubin, Cupertino, CA (US);
Harvind Samra, Fairfield, CA (US);
David Burgess, Fairfield, CA (US);
Guttorm Opshaug, Menlo Park, CA (US);
Jim Omura, San Francisco, CA (US);
TruePosition, Inc., Berwyn, PA (US);
Abstract
Methods having corresponding apparatus and computer-readable media comprise: receiving television signals and a message at an apparatus, wherein the television signals include an NTSC television signal and an ATSC television signal, wherein the message represents first and second arrival times representing absolute times of arrival at the apparatus of a first wavefront of the NTSC and ATSC television signals, respectively; measuring third and fourth arrival times, based on a local clock, after receiving the message, wherein the third and fourth arrival times represent times of arrival at the apparatus of a second wavefront of the NTSC and ATSC television signals, respectively; and providing a clock correction signal for the local clock based on the first arrival time, the second arrival time, the third arrival time, and the fourth arrival time.