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:
Apr. 18, 2006
Filed:
Apr. 22, 2004
Toru Suetomo, Higashihiroshima, JP;
Masahiro Kawasaki, Hiroshima, JP;
Masayuki Imada, Hiroshima, JP;
Yoichi Yamamoto, Hiroshima, JP;
Toru Suetomo, Higashihiroshima, JP;
Masahiro Kawasaki, Hiroshima, JP;
Masayuki Imada, Hiroshima, JP;
Yoichi Yamamoto, Hiroshima, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-Fu, JP;
Abstract
A disc drive device optimally controls a speed for reading RTR-format data, such as video and audio, recorded on a DVD-format disc, thereby enabling real-time playback without interruption. In the disc drive device, information added to each sector is used for determining whether data is RTR-format data. When an error occurs at high-speed reading of RTR-format data and therefore the reading speed is changed to a low speed, the reading speed is so controlled as to be kept at the low speed for reading the following RTR-format data. Thus, for RTR-format data, overhead due to repetitive acceleration and deceleration processes can be avoided, and reading can be carried out without interfering with real-time playback. For normal data, reading can be carried out in a manner similar to that in the background art.