Abstract: A content presentation device which the distributor of a video content can present to a viewer the information which the distributor intends, by adding to and changing the information to present at the time of distribution so that the information may match the content of the video content to distribute, wherein a content matching information presentation server is provided to acquire metadata included in a video content broadcasted by a content provider, to search a keyword based on the metadata, and to compose and distribute the screen with the embedded link information linking to information which is closely related to the hit keyword and which is specified by the distributor of the video content.

Abstract: There is disclosed an electronic advertisement system including: an advertisement displaying device; a local area network that transmits a summary of a content to a terminal; a wide area network that has at least one local area network and gains access to a detail of the content corresponding to receiving the summary by the terminal; and a center device that stores the details of the content, monitors the access to the stored detail of the content, and changes the schedule of an advertisement displayed on the advertisement displaying device located near the local area network based on the monitored result.

Abstract: Occurrence of significant difference of transmission rate between communication zones can be prevented to maintain the transmission rate of overall network uniform. The radio network system includes a plurality of radio communication control units are connected with each other via radio main line, and each radio communication control unit has a communication function with at least one radio communication terminal arranged within own communication area.

Abstract: A plurality of radio relay stations 1 are connected so that bi-directional ring-like paths are made up of radio transmission paths. The respective radio relay stations 1 bidirectionally transmit data inputted from terminals placed thereunder onto the bidirectional ring-like paths respectively. The respective data are respectively received by radio relay stations 2 having data destination terminals placed thereunder along the bidirectional ring-like paths. Each radio relay station, which has received the data destined for the terminals placed thereunder from both directions, transmits earlier incoming data to each terminal placed thereunder and discards later incoming data. Thus, a radio relay system can be implemented which is capable of relaying data with a high degree of reliability.

Abstract: Occurrence of significant difference of transmission rate between communication zones can be prevented to maintain the transmission rate of overall network uniform. The radio network system includes a plurality of radio communication control units are connected with each other via radio main line, and each radio communication control unit has a communication function with at least one radio communication terminal arranged within own communication area.

Abstract: Occurrence of significant difference of transmission rate between communication zones can be prevented to maintain the transmission rate of overall network uniform. The radio network system includes a plurality of radio communication control units are connected with each other via radio main line, and each radio communication control unit has a communication function with at least one radio communication terminal arranged within own communication area.

Abstract: A plurality of radio relay stations 1 are connected so that bi-directional ring-like paths are made up of radio transmission paths. The respective radio relay stations 1 bidirectionally transmit data inputted from terminals placed thereunder onto the bidirectional ring-like paths respectively. The respective data are respectively received by radio relay stations 2 having data destination terminals placed thereunder along the bidirectional ring-like paths. Each radio relay station, which has received the data destined for the terminals placed thereunder from both directions, transmits earlier incoming data to each terminal placed thereunder and discards later incoming data.

Abstract: A system for transmitting data in high precision by restricting a delay in data transmission time includes a hub. The hub receives through the transmission media a data frame transmitted from a communication device that has a transmission request among a plurality of communication devices, and relays the received data frame to a destination communication device based on a destination address included in the received data frame.

Abstract: A system for transmitting data in high precision by restricting a delay in data transmission time, and including a hub. The hub receives through transmission media a data frame transmitted from a communication device that has a transmission request among a plurality of communication devices, and relays the received data frame to a destination communication device based on a destination address included in the received data frame.

Abstract: A data communication system carries out transmission and reception of periodic data between a plurality of computers, and especially an improved data communication system which aims at more effective utilization of a system bus in each computer and which also aims at more effective utilization of a data transmission channel transmitting periodic data, so that the load imposed on the system bus during transfer of periodic data in each computer can be minimized, and the rate of occupation of the data transmission channel during transmission and reception of periodic data can also be minimized.

Abstract: A network system includes a transmission line including a plurality of transmission channels, a plurality of transmission equipment connected to the transmission line to effect the transmission and reception of information between each other, and a plurality of devices connected to each of the transmission equipment, thereby effecting the transmission of information between the devices connected to the plurality of transmission equipment.

Abstract: In an annular transmitting system including a ring-like transmission path realized by interconnecting serially a plurality of transmission stations in an annular form, at least one of the transmissions stations generating repetitively a transmitting frame constituted by a plurality of transmission units referred to as time slots, the frame being circulated along the transmission path, wherein transmission of information among transmission stations is performed in such a manner in which each of the transmission stations having a request to send information inserts the information in the slots by dividing the information, which information is ultimately fetched by the transmission station destined to receive that information, a multi-slot access system in which each of the time slots is provided with an area indicating whether the associated time slot is "free" or "busy", wherein the transmission station having a request to send information determines that the sending of the information is enabled when it is de

Abstract: A ring network data transmission system includes a plurality of transmission apparatuses, at least one terminal connected to each of the transmission apparatuses and double ring transmission paths interconnecting the transmission apparatuses in a ring-like system configuration so that terminals can communicate with one another through the associated transmission apparatuses. When a transmission fault occurs in the network, the transmission apparatus which can serve as the master station issues to all of the other transmission apparatuses a command for searching the fault location. In response to the reception of the command, each of the other transmission apparatuses sends out a monitor signal containing its own address and at the same time checks monitor signal received.

Abstract: A loop transmission system having a plurality of data processor connected through respective transmission station with a common loop transmission line is disclosed. This system has a concentrator connected with a plurality of transmission stations through respective loop transmission lines. The concentrator changes the order of connection said loop transmission lines thereby to change the order of connected of said transmission stations on said loop transmission lines.

Abstract: A looped data transmission system has a pair of looped transmission lines forming two transmission systems having different transmission directions, and a plurality of stations including at least one control station connected to said transmission lines of the two transmission systems. If a fault occurs in the two transmission lines of the two transmission systems in the same section, a loopback configuration is established such that stations adjacent to the faulty section send signals from one system back to the other system. With the loopback configuration being established, the stations which have received supervisory signals sent from a loopback end station send them back to the transmission line of the other system. When one of the loopback end stations has received a supervisory signal from the direction of the faulty section, it is judged that a portion of the faulty section is recovered, and the result of the judgement is communicated to the control station.

Abstract: A loop type data transmission system based on a token pass principle, wherein a station whose transmission of data is completed passes therethrough a token to the stations located downstream. The station demanding the transmission acquires the right of transmission when received the token, to perform data transmission with a given station. The token signal is classified into a free token representative of the freedom of the line and a busy token representative of occupation of the line. Among a plurality of stations, only one station is destined to execute detection of transmission failure and remedy thereof. This one station is adapted to convert the free token detected upon reconstitution and repeating of the received information into the busy signal and subsequently re-send the free token. The station having sent out the free token after the completed data transmission is transferred to the state for reconstituting and repeating the received information when the busy token returns to that station.

Abstract: This invention discloses a loop-back control method for loop-type data transmission systems in which, when a trouble occurs on both transmission lines of two systems, two stations adjacent to the trouble region return signals toward a control station in response to a command from the control station, thereby to separate the trouble region and continue the operation. According to this invention, when the control station detects the occurrence of a trouble on the transmission lines of the two systems, it sends out a broadcast command to search for the trouble point to the transmission lines of both systems and thereafter a loop-back command is issued so that the stations adjacent to the trouble point can loop-back the transmission.

Abstract: A loop type data highway system in which a plurality of data transmission control stations (abbreviated herein as stations) are connected in cascade to a loop transmission line. Each of the stations responds to a polling frame inquiring of request for reservation of the transmission line. The polling frame is composed of a first field for inquiring of the line reservation request and a second field indicative of whether the line is reserved or not. Each station receives signals inputted from the upstream side along the line and sequentially repeats them to the downstream side along the line without delay. In the station having the line reservation requests, a pattern representative of the line reservation is written in the second field after reception of the first field and sends out the polling frame to the downstream. When the second field as received indicates the non-reserved state of the transmission line, transmission of data is initiated in succession to the second field.

Abstract: A duplex transmission control system having active and inactive systems for totally controlling a looped transmission line on which computers and terminal devices are connected through respective stations. Each transmission control unit is operable to transmit and receive specific data related to the priority level specified for each unit. Each transmission control unit suspends the transmission of the clock for a certain period in response to the detection of the clock suspension, then transmits the specific priority data. When a transmission control unit detects its own transmitted signal, it is designated as the active system when another transmission control unit receives the signal defining the active system, it is designated as the inactive system.

Abstract: A dual loop type data highway system comprises a data highway having at least two loops for data transmission and reception, a plurality of data transmitting/receiving stations serially connected to the data highway and a control station serially connected to the data highway. The data transmitting/receiving stations each have means for detecting the beginning of a transmission cycle, one for each of the loops, and the control station has, one for each of the loops, means for detecting the end of the transmission cycle and means for permitting the transmission/reception of data between specified two of the data transmitting/receiving stations during the transmission cycle by polling, whereby an effective transmission rate is increased without considerable increase of hardware.