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:
Aug. 23, 2011
Filed:
May. 26, 2005
Hirochika Maegaki, Hamamatsu, JP;
Hirochika Maegaki, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
There is provided an amplifier that measures a display delay time caused until a video is displayed actually after a video signal is generated, and sets automatically a delay time of an audio signal such that an audio synchronizes with this display. Test video data is stored in a memory. This test video data is video data that generates a clear change in luminance in such a manner that a screen is changed suddenly from deep black to pure white. This test video is output to a video display devicesuch as PDP, for example, and a delay time generated until the test video is displayed actually after this test video is output is measured. Since the luminance of the screen is changed suddenly when the test video is displayed actually, this change can be sensed by an optical sensor. The audio signal is delayed by setting this delay time in an audio signal processing portion, so that the video can synchronize with the audio.