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:
May. 10, 1988
Filed:
Jan. 13, 1986
W Ray Dakin, Huntington Beach, CA (US);
Optical Disc Corporation, Cerritos, CA (US);
Abstract
A videodisc recorder signal processing system and a recording method providing programmed control of the amplitude of the secondary (audio channel) carrier signals relative to the primary (video channel) carrier signal during recording. In one embodiment, the amplitude of the two audio carrier signals are varied in accordance with a preprogrammed profile to counteract the MTF effects of the recording system. In another embodiments, the amplitudes of the two audio carriers are varied in accordance with a preprogrammed pattern related to the relative criticality of the audio and video information recorded on the disc. The signal characteristics of the audio channels are improved by increasing the amplitude of the audio carriers. When no audio information exists, the audio carrier signals are substantially eliminated to maximize the quality of the video channel. At other times, the audio carrier signals are decreased to improve the video quality by reducing IM products.