Abstract: When a call-up is generated, an data type identifying unit of a CPU identifies the type of data type information which is appended as a header to received data as one of sound data, text data, and image and sound data, and displays the type on a display unit comprising a monitor. When the type is sound data or text data, an application for executing a corresponding telephone function or data communication function is activated via the user line connection. When the type is image and sound data, an application for executing a corresponding visual telephone function is activated after line connection.

Abstract: The object is to realize an automatic response to an incoming call and two-way communication using at least images. In a memory (2), a personal identification number for identifying opposite party who is permitted to have communication in an automatic response mode and mode information, which indicates whether or not the automatic response mode is activated, are stored. Upon detection of an incoming call, the central processing unit first judges whether or not the automatic response mode is activated (S2). If the result of the judgement is “yes”, a personal identification number in the calling data received is compared with the personal identification number stored in the memory (2) (S4). As a result, if the personal identification numbers are the same, the unit automatically responds to the incoming call, and two-way communication using images and sound can be carried out (S5).

Abstract: When a call-up is generated, an data type identifying unit of a CPU identifies the type of data type information which is appended as a header to received data as one of sound data, text data, and image and sound data, and displays the type on a display unit comprising a monitor. When the type is sound data or text data, an application for executing a corresponding telephone function or data communication function is activated via the user line connection. When the type is image and sound data, an application for executing a corresponding visual telephone function is activated after line connection.

Abstract: The object is to realize an automatic response to an incoming call and two-way communication using at least images. In a memory (2), a personal identification number for identifying opposite party who is permitted to have communication in an automatic response mode and mode information, which indicates whether or not the automatic response mode is activated, are stored. Upon detection of an incoming call, the central processing unit first judges whether or not the automatic response mode is activated (S2). If the result of the judgement is “yes”, a personal identification number in the calling data received is compared with the personal identification number stored in the memory (2) (S4). As a result, if the personal identification numbers are the same, the unit automatically responds to the incoming call, and two-way communication using images and sound can be carried out (S5).

Abstract: The object is to realize an automatic response to an incoming call and two-way communication using at least images. In a memory (2), a personal identification number for identifying opposite party who is permitted to have communication in an automatic response mode and mode information, which indicates whether or not the automatic response mode is activated, are stored. Upon detection of an incoming call, the central processing unit first judges whether or not the automatic response mode is activated (S2). If the result of the judgement is “yes”, a personal identification number in the calling data received is compared with the personal identification number stored in the memory (2) (S4). As a result, if the personal identification numbers are the same, the unit automatically responds to the incoming call, and two-way communication using images and sound can be carried out (S5).

Abstract: The present invention has as an object thereof to provide a portable videophone unit which is capable of displaying images in the display without an unnatural feeling, even when the transmission of image data is not conducted satisfactorily. In portable videophone unit 10, an image is displayed in display 11 at the point in time at which all the image data of the image to be displayed are complete, and until then, the display of the previous image is continued. Furthermore, when the completeness of all the image data of the next image to be displayed cannot be confirmed within a preset time period, or when a predetermined number of data retransmission requests has been reached when the ARQ method is employed, it is possible to discard the image data of that image and to conduct the decoding of the image data of a subsequent image.

Abstract: A beam spot controlling method for controlling the beam-converging position by a light beam from an objective lens on a recording track of a recording medium comprising the steps of (a) rotating a tapered prism having an inclination-imparting portion capable of imparting an inclination to a light beam which enters the tapered prism for changing the inclination of the light beam incident on said objective lens for controlling the beam-converging position by the light beam; (b) causing a light beam to enter the tapered prisms; and (c) causing the light beam exiting from the tapered prism to enter the objective lens, and directing the exiting light beam onto the recording track of said recording medium, and an apparatus for performing the above beam spot controlling method.