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. 22, 1995
Filed:
Aug. 23, 1994
Akiko Takahama, Itami, JP;
Masahiko Nakamura, Itami, JP;
Hiroyuki Nakayama, Nagaokakyo, JP;
Eiji Arita, Nagaokakyo, JP;
Yoichi Asamoto, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A MUSE-NTSC converter of a relatively simple and small scale circuit design. An oscillation signal from a 28.63636 MHz oscillator (20) is eight times as large as a subcarrier frequency fsc. A Y image processing circuit (17) and a chroma encoder (18) can perform various kinds of processing, such as dividing a frequency of the oscillation signal from the 28.63636 MHz oscillator (20) and the like, to produce a subcarrier frequency. A signal separating circuit (3') receives the oscillation signal from the 28.63636 MHz oscillator (20) as a single system clock and performs some kinds of signal processing which vary from a full wide mode to a zoom mode. Thus, in performing PLL on system clocks in the MUSE mode and the NTSC mode, there may be only one PLL circuit (21) for synchronizing an oscillation signal from a 32.4 MHz oscillator (19) and the oscillation signal from the 28.63636 MHz oscillator (20) in phase.