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. 16, 1999
Filed:
Aug. 31, 1993
Naoki Inomata, Kanagawa, JP;
Toshiyuki Shirasu, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A playback speed control system for a reproducing apparatus allows a user to manually vary the playback speed of a recording medium. When a user rotates a dial of the reproducing apparatus, a frequency generator generates pulses with a frequency that matches the rotational speed of the dial. A counter counts these generated pulses within a specified time period. In one embodiment, the recording medium speed is kept constant over a particular range of dial rotational speeds, while outside this range, the tape speed varies in accordance with the dial rotational speed. In another embodiment, if the value of the count data exceeds a reference value, then these pulses are averaged, and the averaged result is used to determine the speed of the recording medium. If the count data value is less than the reference value, then this count data is used to determine the speed of the recording medium. In yet another embodiment, the generated pulses are averaged in accordance with one of a plurality of averaging techniques. The particular averaging technique is selected in accordance with a comparison between the count data value and a plurality of reference values. Each consecutive pair of reference values defines a particular range. Each range corresponds to a particular averaging technique, and when a count data value falls within a particular range, then the pulses are averaged in accordance with the averaging technique that corresponds to that particular range.