Abstract: An image switching device for connecting to a plurality of image output devices via a digital interface having the capability of selecting image outputs sequentially of the image outputting devices. Cameras (101 to 104) are connected to a camera switching device (105) via an IEEE 1394 standard-based digital interface (114). Synchronizing timing signals transmitted in isochronous communication packets from the camera switching device (105) are synchronized with image signals on the camera (101 to 104) sides, each camera (101 to 104) transmits its image signals in synchronous communication packets based on image switching control data transmitted in asynchronous communication packets or isochronous communication packets from a camera switching control unit (106), and the camera switching device (105) selectively receives image data transmitted from a desired camera based on image switching control data.

Abstract: A sync signal time difference detection circuit detects a time difference of reproduced sync signals reproduced by a first head and a second head having different azimuth angles. Rotation of a capstan motor is controlled in accordance with sync signal time difference information output from the sync signal time difference detection circuit, thereby performing a highly accurate tracking control not affected by jitter or eccentricity.

Abstract: A sync signal time difference detection circuit detects a time difference of reproduced sync signals reproduced by a first head and a second head having different azimuth angles. Rotation of a capstan motor is controlled in accordance with sync signal time difference information output from the sync signal time difference detection circuit, thereby performing a highly accurate tracking control not affected by jitter or eccentricity.

Abstract: A sync signal time difference detection circuit (7) detects a time difference of reproduced sync signals reproduced by a first head (100) and a second head (101) having different azimuth angles. Rotation of a capstan motor (2) is controlled in accordance with sync signal time difference information output from the sync signal time difference detection circuit (7), thereby performing a highly accurate tracking control not affected by jitter or eccentricity.