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:
Sep. 05, 1989
Filed:
Apr. 08, 1988
Mitsushige Tatami, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A time base corrector converts an analog input PAL image signal including a certain time base error to digital form and then stores it in a memory by using a write clock signal derived from the input image signal including the time base error. The stored signal is read out from the memory by a reference readout clock signal to eliminate the time base error, and a reference color burst signal is added to it. The time base corrector extracts a color subcarrier signal from the input image signal, samples the color subcarrier signal by using a first clock signal in a manner such that U-axis data and V-axis data of the color subcarrier signal are generated independently of each other, compares the polarity of the V-axis data of the color burst of the sampled color subcarrier signal with the polarity of the V-axis data of the reference color burst signal, and selectively inverts the polarity of the V-axis data of the color burst of the sampled color subcarrier signal on the basis of the comparison result.