Abstract: A three-dimensional video conversion recording device capable of recording three-dimensional video data on a recording medium after reducing data amount thereof, includes a separating unit for separating an inputted three-dimensional video stream into a plurality of video streams, a decoding unit for decoding at least one of the plurality of separated video streams, a frame thinning unit for reducing data amount of the decoded video stream, an encoding unit for encoding the video stream whose data amount is reduced, a multiplexing unit for multiplexing other video streams which are video streams other than the video stream inputted to the decoding unit out of the plurality of separated video streams and the encoded video stream, and a recording unit for recording the multiplexed video data on a recording medium.

Abstract: Provided is a gateway device for interconnecting an IEEE1394 network and an IP network, which automatically detects and operates an AV device connected to the IEEE1394 network from a player device connected to the IP network, thereby enabling the player device to watch and hear contents stored in the AV device. The gateway device interconnects a network, to which an AV/C installed IEEE1394 device is connected, and a network, to which a player device compliant with a UPnP is connected, and includes: a conversion unit for converting Plug-and-Play processing of the IEEE1394 device to each step of Plug-and-Play of the UPnP; a conversion unit for converting an action of a UPnP AV to an AV/C command of the IEEE1394 device; and a stream transfer unit for transferring stream data transmitted from the IEEE1394 device to the IP network.

Abstract: Provided is a gateway device for interconnecting an IEEE1394 network and an IP network, which automatically detects and operates an AV device connected to the IEEE1394 network from a player device connected to the IP network, thereby enabling the player device to watch and hear contents stored in the AV device. The gateway device interconnects a network, to which an AV/C installed IEEE1394 device is connected, and a network, to which a player device compliant with a UPnP is connected, and includes: a conversion unit for converting Plug-and-Play processing of the IEEE1394 device to each step of Plug-and-Play of the UPnP; a conversion unit for converting an action of a UPnP AV to an AV/C command of the IEEE1394 device; and a stream transfer unit for transferring stream data transmitted from the IEEE1394 device to the IP network.

Abstract: A second is counted at a step S11, and an information table is read at a step S12. Content change of the information table is checked at a step S13. The content change is checked by checking the value of a CRC or checking content change of at least one of values of PIDs of an image, a sound and a PCR, stream types and descriptors, information necessary for operations of a receiver. When the contents of the information table are determined as changed by the aforementioned checking method (YES at the step S13), a determination is made that change of a program is detected at a step S14 and a program parameter described in the information table is set as a signal extraction parameter of a demultiplexer at a step S15, for executing channel changing validating the signal extraction parameter set in the demultiplexer at a step S16. Thus obtained is a digital broadcast receiving system capable of executing receiving in program change with no hindrance through a receiver having a relatively simple structure.