Abstract: An information processing system includes: a reception processor which receives a display request for displaying a display screen of a first user terminal on one or a plurality of display devices, from the first user terminal of a first user among a plurality of users participating in a conference; a specifying processor which specifies a first display application for enabling the display screen to be shared by all users participating in the conference, of display applications which can be used in the first user terminal and the one or plurality of display devices, when the display request has been received by the reception processor; and an output processor which outputs a display instruction including information of the first display application specified by the specifying processor, to the first user terminal.

Abstract: A display control apparatus includes a message storage section configured to store input messages, an attribute information applying section configured to apply attribute information to the messages, and a display control section configured to control displaying of a first display screen having a first display region for displaying the messages in chronological order and a second display region for displaying a message extracted from the messages based on the attribute information.

Abstract: An information processing system includes: a reception processor which receives a display request for displaying a display screen of a first user terminal on one or a plurality of display devices, from the first user terminal of a first user among a plurality of users participating in a conference; a specifying processor which specifies a first display application for enabling the display screen to be shared by all users participating in the conference, of display applications which can be used in the first user terminal and the one or plurality of display devices, when the display request has been received by the reception processor; and an output processor which outputs a display instruction including information of the first display application specified by the specifying processor, to the first user terminal.

Abstract: A display control apparatus includes a message storage section configured to store input messages, an attribute information applying section configured to apply attribute information to the messages, and a display control section configured to control displaying of a first display screen having a first display region for displaying the messages in chronological order and a second display region for displaying a message extracted from the messages based on the attribute information.

Abstract: A communications method carries out error-correction encoding of data, generation of a suitable packet in accordance with a retransmission request from a receiving side, and transmission of the packet to the receiving side, from a transmission side. In the receiving side, the communications method performs error-correction decoding of the received data, distinguishing an uncorrectable block in accordance with a result of the error-correction decoding, and transmission of a retransmission request packet to the transmitting side. In this way, if a block in the packet is judged as uncorrectable by the receiving side, where one packet is composed of a plurality of correction blocks of error correction codes of a block type, it is possible to retransmit only the block to be retransmitted. Therefore, it is possible to avoid unnecessary use of bands and to attain a low bit rate.

Abstract: A communications method carries out error-correction encoding of data, generation of a suitable packet in accordance with a retransmission request from a receiving side, and transmission of the packet to the receiving side, from a transmission side. In the receiving side, the communications method performs error-correction decoding of the received data, distinguishing an uncorrectable block in accordance with a result of the error-correction decoding, and transmission of a retransmission request packet to the transmitting side. In this way, if a block in the packet is judged as uncorrectable by the receiving side, where one packet is composed of a plurality of correction blocks of error correction codes of a block type, it is possible to retransmit only the block to be retransmitted. Therefore, it is possible to avoid unnecessary use of bands and to attain a low bit rate.

Abstract: Data packets (P(1)) to (P(9)) transmitted from a root node include, for example, data blocks (B(101)) each including an error-correction code. If a data packet (P(3)) is received from the root node, and data error of a data block (B(302)), etc. is impossible, a leaf node transmits to the root node a retransmission request for it and block count information (CYCLE5; including a header H making up an independent block) specifying the number of next new transmission data blocks (compression ratio). The root node retransmits requested blocks in a next data packet (P(4)), transmits new blocks (B(401)), (B(402)), and remaining data blocks (B(403)), (B(404)) in a next data packet (P(5)). In this manner, new data is compressed, and the number of retransmissions of data blocks is increased. Thus, data transmission is better ensured while maintaining real time data transmission.

Abstract: Data packets [P(1) to P(8)] transmitted from a root station (1) is received at a plurality of leaf stations (A to C). The data packets [P(1) to P(8)] include a data block [B(101)], etc. each having an error correcting code. Besides, the data packets [P(1) to P(8)] includes information [L(201), L(202) to L(801), L(802)] on the right to make a retransmission request, for giving the right to make a retransmission request to the two of the leaf stations (A to C) in one communication cycle. The leaf stations (A to C) request the root station (1) to retransmit a data block for which error correction is impossible in a communication cycle when the leaf stations (A to C) are respectively given the right to make a retransmission request, by transmitting retransmission requesting packets [LA(1), LB(1), LC(1)], etc. The root station (1) transmits a data packet including the required data block in and after the next communication cycle.

Abstract: An information service system allowing a user to use user-memorable information to obtain desired information includes: a portable device referring to an input logical concept indicating a destination, such as a dining hall for breakfast, a public bath, to search for a physical concept, such as “AZALEA (corresponding to the name of a dining hall for breakfast),” a corner on the third floor, and transmit a retrieved physical concept to a stationary device installed, e.g., at an intersection of passageways in a hotel, and receiving from the stationary device a direction to be taken by the user and displaying such direction; and the stationary device searching for a direction to a physical concept and transmitting to the portable device a retrieved direction to the physical concept. The information service system also includes an association control system to rewrite an association between a logical concept and a physical concept that is stored in the portable device.

Abstract: A communications method carried out (1) error-correction encoding of data, (2) generation of a suitable packet in accordance with a retransmission request from a receiving side, and (3) transmission of the packet to the receiving side, in a transmission side. Meanwhile, in the receiving side, the communications method performs (a) error-correction decoding of the received data, (b) distinguishing an uncorrectable block in accordance with a result of the error-correction decoding, and (c) transmission of a retransmission request packet to the transmitting side. In this way, if a block in the packet is judged as uncorrectable by the receiving side, where one packet is composed of a plurality of correction blocks of error correction codes of a block type, it is possible to retransmit only the block to be retransmitted. Therefore, it is possible to avoid unnecessary use of bands and to attain a low bit rate.