Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Keita Iwami

Tatsuya Tanaka

Yasumichi Hashi

Tomoo Yamakage

Minoru Abe

Yukihiro Sugawara

Masashi Shiratori

A frame synchronization apparatus according to an embodiment includes a reception unit, a frame memory, a time generation unit, a reception time acquisition unit, a timestamp acquisition unit, and a control unit. The reception unit is configured to receive packet data including video data and a timestamp. The frame memory is configured to store the packet data. The time generation unit is configured to generate a time based on a reference synchronization signal. The reception time acquisition unit is configured to acquire a reception time of packet data satisfying a condition based on the time. The timestamp acquisition unit is configured to acquire a timestamp from the packet data satisfying the condition. The control unit is configured to read packet data from the frame memory in accordance with a variation in a difference between the reception time and a time indicated by the timestamp.

Frame synchronization apparatus for a video signal

According to the present embodiment, there is provided a content delivery apparatus applied to a content delivery system which delivers content, which is sent from a transmission apparatus, to a reception apparatus by a multicast method via an IP network. The content delivery apparatus includes an analyzer configured to detect a start point or an end point of the content by analyzing control information of the content, and a manager configured to control a reception start or a reception end of the content, based on the start point or the end point.

Content delivery system, content delivery apparatus, and method

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.

Transmitting system, transmission slotting apparatus, receiving apparatus, and transmission slot generating method

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.

Transmitting system, multiplexing apparatus, and leap second correction method

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.

Growing community of inventors

Fuchu, Japan

Keita Iwami