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. 21, 2006
Filed:
Feb. 08, 2002
Kyoya Tsutsui, Kanagawa, JP;
Tadao Yoshida, Kanagawa, JP;
Kenzo Akagiri, Kanagawa, JP;
Naoya Haneda, Tokyo, JP;
Kyoya Tsutsui, Kanagawa, JP;
Tadao Yoshida, Kanagawa, JP;
Kenzo Akagiri, Kanagawa, JP;
Naoya Haneda, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A signal () of a first code string made through replacing a part of a code string of a predetermined format with dummy data is sent to code string rewriting means () via code string resolution means (). A signal () of a second code string for complementing the dummy data part in the signal () is sent to the code string rewriting means () via control means () and the dummy data in the first code string is rewritten to the second code string. At the time of trial viewing/listening, a signal () from the code string resolution means () is selected by a switch (), and when the second code string () is acquired through content purchase, a signal () from the code string rewriting means () is selected by the switch (). Thus, trial viewing/listening of a content such as music is made possible while the possibility of decryption is eliminated. By acquiring a relatively small quantity of data, reproduction of a high-quality content is made possible.