Abstract: A transmitting system includes a variable-length packet multiplexing apparatus and a transmission slotting apparatus. The variable-length packet multiplexing apparatus generates a variable-length packet. The transmission slotting apparatus stores the variable-length packet in slots forming transmission main signals. The transmission slotting apparatus includes a capacity calculator, an extractor, a remainder calculator, a selector, and a slot information multiplexer. The capacity calculator calculates a data capacity of the transmission main signals for one frame. The extractor extracts a byte number of the variable-length packet. The remainder calculator calculates a remaining capacity of the transmission main signals. The selector stores a predetermined data sequence in a region left in the slots, and outputs the slots storing the data sequence. The slot information multiplexer multiplexes slot information and the slots output by the selector.

Abstract: A transmitting system includes an outputting apparatus and a multiplexing apparatus. The outputting apparatus transmits MMTP packets to which an NTP short format timestamp is added. The multiplexing apparatus multiplexes the MMTP packets. The multiplexing apparatus includes an extractor, a controller, a determiner, a management information generator, a continuity determiner, and a transmission timing adjuster. The transmission timing adjuster writes, for adjustment of a transmission timing of an MMTP packet being close to an MMTP packet in which an NTP short format timestamp value is discontinuous, time information taking a leap second processing into consideration, to the NTP short format timestamp of the MMTP packet.

Abstract: A transmitting system includes a variable-length packet multiplexing apparatus and a transmission slotting apparatus. The variable-length packet multiplexing apparatus generates a variable-length packet. The transmission slotting apparatus stores the variable-length packet in slots forming transmission main signals. The transmission slotting apparatus includes a capacity calculator, an extractor, a remainder calculator, a selector, and a slot information multiplexer. The capacity calculator calculates a data capacity of the transmission main signals for one frame. The extractor extracts a byte number of the variable-length packet. The remainder calculator calculates a remaining capacity of the transmission main signals. The selector stores a predetermined data sequence in a region left in the slots, and outputs the slots storing the data sequence. The slot information multiplexer multiplexes slot information and the slots output by the selector.

Abstract: A transmitting system includes a variable-length packet multiplexing apparatus and a transmission slotting apparatus. The variable-length packet multiplexing apparatus generates a variable-length packet. The transmission slotting apparatus stores the variable-length packet in slots forming transmission main signals. The transmission slotting apparatus includes a capacity calculator, an extractor, a remainder calculator, a selector, and a slot information multiplexer. The capacity calculator calculates a data capacity of the transmission main signals for one frame. The extractor extracts a byte number of the variable-length packet. The remainder calculator calculates a remaining capacity of the transmission main signals. The selector stores a predetermined data sequence in a region left in the slots, and outputs the slots storing the data sequence. The slot information multiplexer multiplexes slot information and the slots output by the selector.

Abstract: According to an embodiment, a multiplexing device includes: a packet generating unit which generates one or more third packets based on at least one of one or more first packets and a second packet; a main signal generating unit which generates from the third packets a main signal; an information generating unit which generates transmission multiplexing control information; a slot generating unit which generates a slot by combining the transmission multiplexing control information and the main signal corresponding to the information described in the transmission multiplexing control information having been generated a predetermined number of frames prior to the currently generated transmission multiplexing control information; and a time writing unit which writes a time in the second packet in the main signal included in the generated slot.

Abstract: A transmitting system includes a variable-length packet multiplexing apparatus and a transmission slotting apparatus. The variable-length packet multiplexing apparatus generates a variable-length packet. The transmission slotting apparatus stores the variable-length packet in slots forming transmission main signals. The transmission slotting apparatus includes a capacity calculator, an extractor, a remainder calculator, a selector, and a slot information multiplexer. The capacity calculator calculates a data capacity of the transmission main signals for one frame. The extractor extracts a byte number of the variable-length packet. The remainder calculator calculates a remaining capacity of the transmission main signals. The selector stores a predetermined data sequence in a region left in the slots, and outputs the slots storing the data sequence. The slot information multiplexer multiplexes slot information and the slots output by the selector.

Abstract: A transmitting system includes an outputting apparatus and a multiplexing apparatus. The outputting apparatus transmits MMTP packets to which an NTP short format timestamp is added. The multiplexing apparatus multiplexes the MMTP packets. The multiplexing apparatus includes an extractor, a controller, a determiner, a management information generator, a continuity determiner, and a transmission timing adjuster. The transmission timing adjuster writes, for adjustment of a transmission timing of an MMTP packet being close to an MMTP packet in which an NTP short format timestamp value is discontinuous, time information taking a leap second processing into consideration, to the NTP short format timestamp of the MMTP packet.

Abstract: According to an embodiment, a multiplexing device includes: a packet generating unit which generates one or more third packets based on at least one of one or more first packets and a second packet; a main signal generating unit which generates from the third packets a main signal; an information generating unit which generates transmission multiplexing control information; a slot generating unit which generates a slot by combining the transmission multiplexing control information and the main signal corresponding to the information described in the transmission multiplexing control information having been generated a predetermined number of frames prior to the currently generated transmission multiplexing control information; and a time writing unit which writes a time in the second packet in the main signal included in the generated slot.

Abstract: According to one embodiment, a data transmitting device communicates with a plurality of other communication devices through a network. The data transmitting device includes a session manager and a communication processor. The session manager sequentially and cyclically selects a plurality of sessions relevant to the other communication devices. The communication processor performs a transmitting process of data to the other communication device relevant to the session selected by the session manager in each time each of the sessions is selected so as to suppress variations in amounts of transmitted data among the sessions with respect to an amount of data transmitted per one transmitting process.

Abstract: According to one embodiment, a packet distribution apparatus distributes packets each containing a digital content via a communication network. The packet distribution apparatus includes a generator, a packet transmitter, a detector and a swapper. The generator generates the packets for each session with a bit rate corresponding to a content to be distributed. The packet transmitter transmits the generated packets to the communication network. The detector detects a collision of transmission timings of the packets in the sessions. The swapper exchanges, upon detecting a collision of the transmission timings, a transmission order of packets associated with the collision of the transmission timings based on the bit rates.

Abstract: According to an embodiment, a content delivery server system is provided with a timer, a buffer, a next transmission time generation part, an abnormality judgment part, and a transmission control part. The buffer holds contents for every session temporarily. The next transmission time generation part generates a next transmission time based on a time stamp added to the contents to be put on an IP packet of next transmission. The abnormality judgment part judges whether a difference between the next transmission time and the present time is greater than a first threshold value which is a positive value, and judges whether the difference is smaller than a second threshold value which is a negative value. The transmission control part performs a control not to transmit the IP packet when the difference between is greater than a first threshold value or is smaller than a second threshold value.

Abstract: According to an embodiment, a data transferring apparatus is connected to a control device and transmits data stored in a memory device in units of blocks to a network. The apparatus includes a command issuing unit, a transmission data extracting unit, and a communication processing unit. The command issuing unit is configured to issue, to the memory device, a read command for reading a block for which a read instruction is given from the control device. The transmission data extracting unit is configured to extract transmission data from data read from the memory device according to the read command. The communication processing unit is configured to transmit the extracted transmission data to the network based on a predetermined protocol.

Abstract: According to one embodiment, a packet distribution apparatus distributes packets each containing a digital content via a communication network. The packet distribution apparatus includes a generator, a packet transmitter, a detector and a swapper. The generator generates the packets for each session with a bit rate corresponding to a content to be distributed. The packet transmitter transmits the generated packets to the communication network. The detector detects a collision of transmission timings of the packets in the sessions. The swapper exchanges, upon detecting a collision of the transmission timings, a transmission order of packets associated with the collision of the transmission timings based on the bit rates.