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:
Mar. 26, 2002
Filed:
Oct. 14, 1998
Yoichiro Sako, Tokyo, JP;
Isao Kawashima, Kanagawa, JP;
Yoshitomo Osawa, Kanagawa, JP;
Akira Kurihara, Kanagawa, JP;
Shozo Masuda, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A signal recording/reproducing method and apparatus, signal record medium and signal transmission/reception method and apparatus, whereby a signal recorded on a signal record medium can identified as being an original signal or a copied signal. A CPU generates, at a pe-set time interval, an identification signal having a meaning at a pre-set time interval, and an identification signal addition circuit adds the identification signal to the video signals and/or the audio signals. A sector forming circuit and circuit components up to a recording/reproducing head record the video signals and/or the audio signals and the ancillary identification signal on an optical disc