Fujitsu Corporation

Tetsuya Yasui

Hideki Miyasaka

Hiroshi Ohtsuru

Yuji Ishii

Takehiko Fujiyama

Naoyuki Takeshita

Shinichirou Miyajima

Toshihiro Yamanaka

Toshikazu Senuki

Jun Endoh

Katsuhiro Eguchi

Masahiro Abe

In a receiving device, time information is separated from received multimedia data, a first difference is calculated between two consecutive pieces of time information, and a second difference is calculated between reception timings of the two consecutive time information. Jitter is calculated from the first difference and the second difference, and a clock for reproducing the multimedia data is adjusted based on the calculated jitter.

Data receiving device, data receiving method, and computer product

A communication system that can improve communication quality by accurately re-creating reproduction timing at the receiving end even at the time of receiving VBR data or in the case of the occurrence of a packet loss. A send rate recognition section recognizes a send rate from a time stamp. A memory stores data. A dummy data addition section adds dummy data for correcting the difference between a read rate set for reading out data from the memory and the send rate to the data written to the memory. A read clock generation section generates a read clock which is equal to the read rate. A dummy data removal section removes the dummy data from the data read out from the memory on the basis of the read clock.

Communication system

An apparatus for reproducing a system clock provided with a reproducing unit for reproducing a first time reference clock T , a generating unit for generating a system clock Sck, a generating unit for generating a second time reference clock T , a synchronization control unit for minimizing, based on the clocks T and T , the deviation between these clocks, a first calculating unit for calculating a difference between counts of the clock T counted in a predetermined time interval, and a second calculating unit for calculating a difference between counts of the clock T counted in a predetermined time interval, the outputs of the calculation of the differences being input to the synchronization control unit to minimize the deviation between the clocks, whereby it becomes possible to reproduce high quality data even when switching channels from one node to another node when reproducing digital data from a plurality of sending side nodes at a receiving side node.

Method and apparatus for reproducing system clock in digital data transmission network

A video signal processing apparatus includes a receiver receiving an incoming video signal and producing an output video signal in response thereto, a limit setup unit setting up at least one of an upper limit value and a lower limit value for the output video signal, and a limiter supplied with the output video signal from the receiver and further with at least one of the upper limit value and the lower limit value from the limit setup unit, wherein the limiter limits a level of the output video signal produced by the receiver, by comparing the level of the output video signal according to any of the upper limit value and the lower limit value.

Video signal receiver with level limited output

Growing community of inventors

Fukuoka, Japan

Tetsuya Yasui