Abstract: A digital broadcast sending/receiving system includes a digital broadcast sending apparatus and a digital broadcast receiving apparatus. The digital broadcast sending apparatus multiplexes the audio data and video data of a broadcast program into the transport stream together with preselection control information which controls preselection information image facilitating program preselection, and sends the transport stream to the digital broadcast receiving apparatus. On receiving the transport stream, the digital broadcast receiving apparatus extracts the preselection control information, and reproduces a preselection screen on a display in which the preselection information image is superimposed on the video image of the broadcast program. The digital broadcast receiving apparatus receives from the viewer specification of a program to be preselected.

Abstract: A broadcast receiving device comprises: a memory medium 403 that stores a received e-mail and broadcast mail, an add-on program 402b for adding an e-mail header to a broadcast mail body text, and a display program 402c that displays a broadcast mail and an e-mail stored in the memory medium 403 on a monitor 407. When a CPU 411 receives the broadcast mail according to the programs, it extracts the broadcast mail body text, adds the e-mail header to the broadcast mail, stores it in the memory medium 403. Then the CPU 411 reads out the information of the broadcast mail and the e-mail stored in the memory medium 403, and displays them in one screen.

Abstract: A plurality of HTML files having their file names which may directly be recognized by a filtering part 415 in a data receiver are stored in a data storage part 411. File names of the HTML files are assigned to their headers by a data converter 412, and the files converted and multiplexed are repeatedly transmitted by a data multiplexing and transmitting part 413. A filtering part 415 selects the data having exact match with the filtering condition. A data processing part 419 performs data processing required for generating images, and the images thus generated are displayed on a screen of the display part 421. The data processing part 419 provides a switching command to a filtering conditions varying part 417 when an operator enters a file to be linked through an input part 420. The file to be linked is received as a result of changing the filtering conditions.

Abstract: A data transmission apparatus has a multiplexing unit that cyclically multiplexes presentation information and navigation information stored in a transmission data storage unit according to control by a multiplexing control unit and a transmission unit that transmits the multiplexed stream. The reception control unit of a data reception apparatus sets filter conditions in a filter condition storage unit of a TS decoder unit in accordance with user operation indications. The presentation information and navigation information separated by the TS decoder unit are outputted via a reproduction unit to a display unit and an audio output unit.

Abstract: A terminal apparatus is provided for displaying an image by reproducing a piece of image information and for interactively changing the image using navigation information. The image is a moving picture, a still picture, or a mixture of them. The image information and the navigation information together are broadcast by a broadcasting station to the terminal apparatus. The navigation information indicates a plurality pieces of link-target image information. The cache unit stores a pair of image information and navigation information. The reproducing unit reproduces the image information. The monitoring unit monitors whether an operator has performed a certain operation responding to the image displayed.

Abstract: A data transmission apparatus has a multiplexing unit that cyclically multiplexes presentation information and navigation information stored in a transmission data storage unit according to control by a multiplexing control unit and a transmission unit that transmits the multiplexed stream. The reception control unit of a data reception apparatus sets filter conditions in a filter condition storage unit of a TS decoder unit in accordance with user operation indications. The presentation information and navigation information separated by the TS decoder unit are outputted via a reproduction unit to a display unit and an audio output unit.

Abstract: A data display control apparatus receives a digital broadcast and compares the present time with a time indicated in a Time_Event_Part provided in navigation information used to control the display of the multimedia data composing a broadcast program. When the indicated time has been reached, the data display control apparatus executes instructions to control the display of the multimedia data.

Abstract: A real-time OS simulator simulates dispatch processing and interrupt handling of a real-time OS on a general-purpose multi-thread OS. Threads 21 to 23 corresponding to tasks, threads 31 to 33 that generate an interrupt, and a thread 11 for controlling concurrent thread running on the multi-thread OS. Each of the threads 21 to 23, selects, when calling a system function, any thread to run next, instructs the thread 11 to start processing, and then suspends itself. After the running thread is suspended, the instructed thread 11 resumes the selected thread. Any one of the threads 31 to 33 that called an interrupt handling function 13 suspends the running thread, calls an interrupt handler, and then selects any thread to run next for resuming. In addition to the threads 21 to 23, an exception handling thread may be assigned for each task.

Abstract: A broadcast reception apparatus is provided with a reception unit for receiving broadcast data as a transport stream. The transport stream includes video data and a plurality of navigation information sequences. Each navigation information sequence includes navigation information which includes graphics data to be combined with the video data for display. A TS (Transport Stream) decoder unit extracts the video data and navigation information from the transport stream. A reception control unit controls the TS decoder unit so that the TS decoder unit extracts navigation information from a navigation information sequence which is suitable for the the broadcast reception apparatus. A navigation information storage unit stores the navigation information extracted by the TS decoder unit.

Abstract: A data display control apparatus receives a digital broadcast and compares the present time with a time indicated in a Time_Event_Part provided in navigation information used to control the display of the multimedia data composing a broadcast program. When the indicated time has been reached, the data display control apparatus executes instructions to control the display of the multimedia data.

Abstract: A terminal apparatus is provided for displaying an image by reproducing a piece of image information and for interactively changing the image using navigation information. The image is a moving picture, a still picture, or a mixture of them. The image information and the navigation information together are broadcast by a broadcasting station to the terminal apparatus. The navigation information indicates a plurality pieces of link-target image information. The cache unit stores a pair of image information and navigation information. The reproducing unit reproduces the image information. The monitoring unit monitors whether an operator has performed a certain operation responding to the image displayed.

Abstract: When a program transmission apparatus divides a program into a plurality of partial programs before transmission, a program reception execution apparatus executes a partial program when the partial program has already been received, and, when the execution needs to proceed to from a present partial program to a next partial program, executes the other partial program when the next partial program has been received.

Abstract: When gradation values of an original image are converted, a pixel data read unit reads out a piece of pixel data, and a pixel data conversion unit converts the gradation value of the piece of pixel data. A condition judging unit decides whether a pixel corresponding to the piece of pixel data satisfies a predetermined condition, and a data conversion correction unit corrects by a stochastic process the conversion performed by the pixel data conversion unit when the condition judging unit decides that the piece of pixel data satisfies the predetermined condition.

Abstract: An on-demand communication system provides a multimedia server connected to a plurality of clients via a network. A data stream can be transmitted in response to a transmission request of a title from a transmission device at the site of the client. The transmission device will transmit a set of reproduction information, including a plurality of titles and reproduction start times to the server along with the client identification. The server contemporarily would store, in a buffer, the reproduction information and the client identifier, read the reproduction information and the client identifier and then create a set of transmission information for each client request. A timer unit can activate a timer assigned to the client to measure time when the data stream transmission device is to start transmitting the data stream to the client.

Abstract: The present invention provides an electronic document filing system. The electronic document filing system comprises a document database for storing document, an input unit for controlling the system, a document data generating unit for generating the document data, a layout data generating unit for generating layout data, a display unit for displaying the data generated by the document data generating unit and layout data generating unit, and a control unit for controlling the display unit to send image data of the page being retrieved to the layout data generating unit upon receipt of a retrieval command from the input unit to display the resulting data of a conversion into the layout data, and to send the image data of the specified page to the document data generating unit to display the image data of the specified page in a legible image.

Abstract: 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.

Abstract: The present invention provides an electronic document filing system. The electronic document filing system comprises a document database for storing document, an input unit for controlling the system, a document data generating unit for generating the document data, a layout data generating unit for generating layout data, a display unit for displaying the data generated by the document data generating unit and layout data generating unit, and a control unit for controlling the display unit to send image data of the page being retrieved to the layout data generating unit upon receipt of a retrieval command from the input unit to display the resulting data of a conversion into the layout data, and to send the image data of the specified page to the document data generating unit to display the image data of the specified page in a legible image.