Fujitsu Corporation

Fujitsu Semiconductor Limited

Yuji Tarui

Hiromitsu Horie

Kazuhito Takashima

Katsuyoshi Otsu

Ryuichi Yoda

Kunihiko Matsumoto

In a transmitting end, positional information indicating positions of data packets to be reproduced in a receiving end among data packets in an inputted bit stream is generated with a plurality of data packets as one unit, and generated one piece of positional information is given to a plurality of data packets, and the data packets with the positional information are transmitted. In a receiving end, reproduction timings are controlled based on the received positional information, and the received data packets are reproduced. As a result, even if a time interval of the data packets to be reproduced in the receiving end in the bit stream inputted into the transmitting end doesn't have a fixed period, the data packets can be reproduced in the receiving end in the same timing as in the transmitting end by only giving one piece of positional information to the plurality of data packets.

Transmission apparatus and transmission method

A DMA channel data quantity setting section sets a data transfer quantity of each of a plurality of DMA channels in accordance with a data quantity or a ratio in advance. A channel select control circuit determines whether each DMA channel is active. A data transfer control circuit transfers the data of the DMA channel determined to be active by the channel select control circuit in accordance with the data transfer quantity of each DMA channel set by the DMA channel data quantity setting section. By doing so, a plurality of DMA requests are accepted per bus hold request, and the number of bus management right arbitration procedures and the latency between the channels are decreased.

DMA controller and DMA transfer method

A home gateway apparatus connected to intra-home terminal devices in a home network, has external interfaces to external terminals; internal interfaces to the intra-home terminal devices; a management table memory having management information to be sent and a destination address of the intra-home terminal devices; a management information memory to store the acquired management information; and a management information control unit to send the management information to the external terminal, based on the destination address stored in the management table, after acquiring the management information of the terminal device based on the management information to be sent stored in the management table. The home gateway apparatus can freely select a sending mode of the management information for every intra-home terminal devices, by setting the management table. Therefore, the gateway apparatus having an advanced versatility can be provided.

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Kawasaki, Japan

Yuji Tarui