An input apparatus capable of controlling a plurality of electronic devices including a set-top box includes comprises: a first operation key part having a plurality of operation keys; a second operation key part having a plurality of operation keys; a control key part having at least one control key; a control unit for generating operation information for a first electronic device when any operation key of the first operation key part is operated, the control unit further generating operation information for the first electronic device when, with no control key of the control key part operated, any operation key of the second operation key part is operated, the control unit further generating operation information for a second electronic device when, with any control key of the control key part operated, any operation key of the second operation key part is operated; and a transmission unit for transmitting the operation information generated by the control unit.

A CD replay device, which includes an ejection button for controlling the ejection of a CD and which reads data on a surface of the CD. A disk ejection operation is performed when the ejection button has been depressed for a period of time that is less than a predetermined period. The replaying of a CD begins when the ejection button has been depressed for the predetermined period of time or longer.

A display device, for connection to a host computer generating a primary video signal, has a pass-through function which provides primary and secondary video outputs. The secondary video output, consisting of an RGB image signal and synchronization signals, corresponds to the primary video signal, so that identical picture signals generated from a single source, i.e., the host computer, can be simultaneously applied directly to multiple display devices with minimum cable connections and a high signal-to-noise ratio.

A computer graphics animation editing system includes a memory for storing a status switch data unit including a starting data block and a response data block, the starting data block indicating a condition of a virtual world, the response data block indicating a response which should occur when the condition indicated by the starting data block is satisfied, a calculation block for calculating an updated condition of the virtual world, a checking block for determining whether the updated condition of the virtual world calculated by the calculation block is equal to the condition indicated by the starting data block of the status switch data unit, a start processing block for causing the response indicated by the response data block to start when the checking block determines that the updated condition of the virtual world is equal to the condition indicated by the starting data block of the status switch data unit, and a display unit for displaying the virtual world including the result obtained by the start processing block.

A CD-ROM 201 for recording multi-media information of at least one page stream. Contents of each page stream are successively recorded in the storage areas in the CD-ROM 201. The following three items are shown by the page stream: a partial image list having at least one pair of partial image data which describes partial images of one screen image and display state information including X-Y coordinates, X-Y enlargement rates and a rotational angle showing the display state; control information which describes command to be executed corresponding to an input signal; time line information which describes parameters concerning time sequence processing to be executed corresponding to the control information. The display data creation unit 213 synthesizes partial images shown by the partial image list and creates display data from the partial image data and display state information in the page stream read from the CD-ROM 201, and writes the display data in the display data storage unit 209.