The present invention is intended to provide network delivery data transmitting methods and receiving methods which allow the selection of content data as desired by user. In a data transmitting system, a specification information packet for specifying a content source used, plural packet sequences each attached with identification information, and a correspondence information packet for relating the content sources with the identification information are multiplexed with on on-air stream, which is transmitted to each receiving system via a network. On the basis of the received specification information packet and correspondence information packet, each receiving system selects desired content data from plural pieces of content to view the selected content data at the same time or in a switched manner.

A display authorization area corresponding a user is selected from maps stored in a device, only the selected zone is displayed, and a camera which is not authorized for the user to perform information communication is inhibited from being displayed. With this arrangement, a camera control system having so excellent security that any user cannot see a place irrelevant to the user and cannot recognize the position of an installed camera is constructed.

An interactive system for motion picture display of a magic show has a remote information site, such as a television station or internet web site having one of a series of cameras for recording simultaneously different views of a same motion element of a live magic show from predetermined different camera angles and a (video) recording of different views of a magic show pre-recorded simultaneously by a series of cameras set at predetermined different camera angles and television or computer for accessing at least some of the different views locally by one of line and wireless means and operable by an individual member of an audience to switch channels to switch different views for display, alternatively, on a screen, during the magic show. A view access fee can be collected. The different views may be stored on a DVD/CD or hard drive.

A T.V camera in center field beyond the playing field directed at the home plate along a main axis. The camera senses the baseball in the strike zone. A second T.V. camera directed at the home plate in direction perpendicular to the main axis, which also senses the baseball in the strike zone, but in an area between the front end limits of the home plate. The two T.V. cameras are connected in series and serve to control the scoreboard and show on the scoreboard when the baseball in its passage by the strike zone constitutes a strike.

A three-dimensionally moveable camera system, including at least three elongated flexible members, at least three motor driven reels for expanding and retracting the flexible members, at least three equipment support members attached to the flexible members, and a three-dimensionally moveable camera assembly including a movable camera mount connected to the equipment support members, a camera, a cover that conveys advertising information to spectators, and control electronics which control an angular orientation of the moveable assembly including the cover. The cover may be in the form of a polygon or a mold.