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. 31, 1988
Filed:
Jun. 18, 1986
Masahiro Shibata, Tokyo, JP;
Tatsuo Tsujibayashi, Kanagawa, JP;
Hiroyuki Sato, Kanagawa, JP;
Yoshinori Machida, Tokyo, JP;
Daisuke Murakami, Tokyo, JP;
Yoko Ohgane, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an apparatus for reproducing either a video signal or a PCM (pulse code modulated) audio signal from a record medium, the existence of a PCM audio signal recorded on the record medium is detected in response to an identifying pilot signal recorded together with the PCM audio signal, and, when a video signal is being reproduced, detection of a PCM audio signal is obviated. Thus, even if the identifying pilot signal and a portion of the video signal are superposed upon each other on a frequency axis, erroneous assumption of the presence of a recorded PCM audio signal can be avoided to prevent incorrect reproducing operation.