Patent ID: 7525572
Filing Date: 2009-04-28
Classification: H04N

Abstract:
1. A video camera comprising: an image sensor for converting incident light into an electric signal; first means for converting the electric signal generated by the image sensor into a digital video signal; a memory having a first storage area for storing segments of the digital video signal generated by the first means on a frame-by-frame basis; second means for detecting a shake of a camera body, and generating an analog detection signal representative of the detected shake; an amplifier for amplifying the analog detection signal generated by the second means to generate an analog amplification-resultant signal; third means for converting the analog detection signal generated by the second means and the analog amplification-resultant signal generated by the amplifier into a digital detection signal and a first digital amplification-resultant signal respectively; fourth means for amplifying a signal value represented by the digital detection signal generated by the third means on a digital basis to generate a second digital amplification-resultant signal; fifth means for deciding whether or not values represented by at least two successive samples of the first digital amplification-resultant signal are greater than a predetermined reference value; sixth means for selecting the second digital amplification-resultant signal when the fifth means decides that the values represented by the at least two successive samples of the first digital amplification-resultant signal are greater than the predetermined reference value, and selecting the first digital amplification-resultant signal when the fifth means decides that the values represented by the at least two successive samples of the first digital amplification-resultant signal are not greater than the predetermined reference value; seventh means for generating a shake corrective signal in response to the signal selected by the sixth means; eighth means for reading out segments of the digital video signal from a second storage area movable within the first storage area of the memory to generate a correction-resultant video signal; and ninth means for moving the second storage area relative to the first storage area in response to the shake corrective signal generated by the seventh means.