Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Tsuyoshi Kasaura

Sadayuki Inoue

Masahiro Tsujishita

Soichiro Matsumoto

Takashi Fujiwara

Kenji Sakata

Tetsuro Shida

Toshimitsu Sato

A receiving device () is provided to allow appropriate clock regeneration even for a VBR TS when a stream including video and audio data, such as an MPEG2 TS, is transmitted or received in real time through a network having jitter. When the received packet data is stored in a memory () and the packet data is output in accordance with time information added to the received packet data, a clock frequency deviation between a sending device and a receiving device is calculated on the basis of the integration result of the amount of the received packets temporarily stored in the memory (), the number of the received packets which have been processed, and the measurement result of the integration time used for integrating the amount of the received packets. A read timing offset of the received packet is obtained on the basis of the calculation result of the clock frequency deviation.

Data receiving device and data receiving method

A management unit () which issues a digital certificate to a new transmission unit () includes a wireless communication section for performing communication in a network () and a wire communication section to which the new transmission unit () can be connected; when the new transmission unit () is wire-connected to the management unit (), it is judged in accordance with the received device type information of the new transmission unit (), whether or not the new transmission unit () is a device having a communication means that can communicate in the network (); and if the new transmission unit is judged as a device having that type of means, the management unit creates a digital certificate by using a device identifier specific to the new transmission unit (), and sends the digital certificate to the new transmission unit ().

Data sending/receiving device and digital certificate issuing method

Growing community of inventors

Tokyo, Japan

Tsuyoshi Kasaura