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:
Nov. 26, 1991
Filed:
Sep. 26, 1988
Hiroshi Tanaka, Moriguchi, JP;
Tetsuo Ishiwata, Suita, JP;
Shuzo Hitotsumachi, Yawata, JP;
Hitoshi Komae, Osaka, JP;
Susumu Yamaguchi, Moriguchi, JP;
Tadashi Yoshino, Neyagawa, JP;
Eiji Yamauchi, Neyagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A signal processing system for absorbing asynchronism between a video signal and an audio signal which is caused when a PCM audio signal is to be recorded together with the video signal on a helical scan-type tape recorder. When the video signal and the audio signal are recorded on the same track, a recording band width of the audio signal should be narrow. A sample pattern is provided which assures rapid pull-in for both data clock reproduction and carrier reproduction, when the audio signal is modulated by QPSK or when Q-QPSK modulation is used.