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A remote teaching system 2 includes a teacher station 4 and a plurality of student stations 6 which may be located at sites remote from one another. Each station 4, 6 includes a speaker telephone 122, 122′or other voice telephone set which is connectable to a telephone system 124 for voice communica

A remote teaching system 2 includes a teacher station 4 and a plurality of student stations 6 which may be located at sites remote from one another. Each station 4, 6 includes a speaker telephone 122, 122′or other voice telephone set which is connectable to a telephone system 124 for voice communication among the various stations. Each station 4, 6 includes a video display monitor 14, 14′such as a television set and a video media player 16, 16′such as a video-tape cassette player connected to the video display monitor 14, 14′. Each student station 6 also includes a video-media-player controller 8′, 22′which is connected to the video media player 16′of the student station 6 for controlling the playing of the player. The teacher station 4 includes a video-media-player master controller 8, 22 connected to the video media player 16 of the teacher station 4 for controlling the playing of the player. The video-media-player master controller 8, 22 of the teacher station 4 and the video-media-player controller 8′, 22′of the student stations are connectable to the telephone system 124 for transmitting and receiving telephonic control signals over the telephone system, so that the playing of the video media player 16 of the teacher station 4 and the video media players 16′of the student stations 6 can be synchronized.

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A remote teaching system, comprising: (a) a teacher station including (a.1) a digital computer having random-access memory for storing data and programs, a central processing unit in communication with the random-access memory for executing programs stored in the memory, a keyboard in communication

A remote teaching system, comprising: (a) a teacher station including (a.1) a digital computer having random-access memory for storing data and programs, a central processing unit in communication with the random-access memory for executing programs stored in the memory, a keyboard in communication with the random-access memory for entering data and programs into the memory, and an input/output channel, the input/output channel including a computer video-signal output port and a digital-signal output port, the input/output channel being adapted to generate at the computer video-signal output port a computer video signal for driving a video display monitor and to generate digital signals at the digital-signal output port in response to output commands from the central processing unit; (a.2) a video display monitor having a video-display-monitor video-signal input port, the video display monitor being adapted to display visual images in response to video signals applied to the video-signal input port; (a.3) a video-tape cassette player having a video-player video-signal output port and a video-player control-signal input port, the video-tape cassette player being adapted to play a video tape cassette mounted in the player in response to video-player start/stop control signals applied to the video-player control-signal input port, the video signal obtained from the video tape cassette being produced at the video-player-video-signal output port; (a.4) an interface controller having a computer video-signal input port, a video-player video-signal input port, a display-monitor video-signal output port, a computer digital-control-signal input port, and a video-player control-signal output port, the interface controller being adapted to connect the display monitor video-signal output port to one of the computer video-signal input port or the video-player video-signal input port in response to a video-signal-selection control signal applied to the computer digital-control-signal input port, the interface controller being adapted to produce video-player start/stop control signals at the video-player control-signal output port in response to video-player start/stop control signals applied to the computer digital-control-signal input port for controllably starting and stopping the playing of a video tape cassette in the video-tape cassette player; (a.5) video-signal transmission means connecting respectively (i) the video-player video-signal output port of the video-tape cassette player to the video-player video-signal input port of the interface controller, (ii) the computer video-signal output port of the digital computer to the computer video-signal input port of the interface controller, and (iii) the display-monitor video-signal output port of the interface controller to the video-display-monitor video-signal input port of the video display monitor; (a.6) control-signal transmission means connecting respectively (i) the digital signal output port of the input/output channel of the digital computer to the computer digital-control-signal input port of the interface controller and (ii) the video-player control-signal output port of the interface controller to the video-player control-signal input port of the video-tape cassette player; (a.7) a speaker telephone; (a.8) a voice/data modem having a data-channel port, a voice-channel port and a telephone line connection port adapted to be connected to a telephone system; (a.9) digital-signal transmission means connecting the input/output channel of the digital computer to the data-channel port of the voice/data modem; and (a.10) voice-telephonic signal transmission means connecting the voice-channel port of the voice/data modem to the speaker telephone; and (b) a plurality of student stations, each student station being connectable to the teacher station over a telephone sysem, each student station including: (b.1) a digital computer having random-access memory for storing data and programs, a central processing unit in communication with the random-access memory for executing programs stored in the memory, a keyboard in communication with the random-access memory for entering data and programs into the memory, and an input/output channel, the input/output channel including a computer video-signal output port and a digital-signal output port, the input/output channel being adapted to generate at the computer video-signal output port a computer video signal for driving a video display monitor and to generate digital signals at the digital-signal output port in response to output commands from the central processing unit; (b.2) a video display monitor having a video-display-monitor video-signal input port, the video display monitor being adapted to display visual images in response to video signals applied to the video-signal input port; (b.3) a video-tape cassette player having a video-player video-signal output port and a video-player control-signal input port, the video-tape cassette player being adapted to play a video tape cassette mounted in the player in response to video-player start/stop control signals applied to the video-player control-signal input port, the video signal obtained from the video tape cassette being produced at the video-player video-signal output port; (b.4) an interface controller having a computer video-signal input port, a video-player video-signal input port, a display monitor video-signal output port, a computer digital-control-signal input port, and a video-player control-signal output port, the interface controller being adapted to connect the display monitor video-signal output port to one of the computer video-signal input port or the video-player video-signal input port in response to a video-signal-selection control signal applied to the computer digital-control-signal input port, the interface controller being adapted to produce video-player start/stop control signals at the video-player control-signal output port in response to video-player start/stop control signals applied to the computer digital-control-signal input port for controllably starting and stopping the playing of a video tape cassette in the video-tape cassette; (b.5) video-signal transmission means connecting respectively (i) the video-player video-signal output port of the video-tape cassette player to the video-player video signal input port of the interface controller, (ii) the computer video-signal output port of the digital computer to the computer video-signal input port of the interface controller, and (iii) the display-monitor video-signal output port of the interface controller to the video-display-monitor video-signal input port of the video display monitor; (b.6) control-signal transmission means connecting respectively (i) the digital signal output port of the input/output channel of the digital computer to the computer digital-control-signal input port of the interface controller and (ii) the video-player control-signal output port of the interface controller to the video-player control-signal input port of the video-tape cassette player; (b.7) a speaker telephone; (b.8) a voice/data modem having a data-channel port, a voice channel port and a telephone line connection port adapted to be connected to the telephone system for voice/data communication with the teaching station and with other student stations; (b.9) digital-signal transmission means connecting the input/output channel of the digital computer and the data-channel port of the voice/data modem; and (b.10) voice telephonic signal transmission means connecting the voice-channel port of the voice/data modem and the speaker telephone.