Patent ID: 8416652
Filing Date: 2013-04-09
Classification: G11B,H04N

Abstract:
1. An operation device comprising: a rotational operation element; an angular velocity detection portion detecting an angular velocity of a rotational operation on the rotational operation element; and a playback speed information computation portion calculating, when the angular velocity detected by the angular velocity detection portion is in a first velocity range including an angular velocity of 0, playback speed information according to the detected angular velocity through a first functional computation and when the angular velocity detected by the angular velocity detection portion is in a second velocity range, which is a range higher than the first velocity range, playback speed information according to the detected angular velocity through a second functional computation, and outputting the calculated playback speed information, wherein in the first functional computation a relation between the angular velocity and the playback speed information is linear and in the second functional computation a relation between the angular velocity and the playback speed information is non-linear, such that the calculated playback speed information obtained from an increase in the angular velocity in the second velocity range has a value of a playback speed associated therewith which is larger than that obtained with the same increase in the angular velocity in the first velocity range.