Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Toshikazu Hattori

Susumu Ibaraki

Akihiro Yamamoto

Toshiaki Mori

Takashi Kuwabara

Atsushi Yamashita

Toshihiko Kurosaki

Yuji Mizuguchi

Hiroki Murakami

Tomoo Hori

Toshihisa Ikeda

Teruaki Ata

Toshiyuki Itabashi

Morio Iwasaki

Takahisa Sakai

Kenichi Moriguchi

Satoru Kotani

Naoyuki Shimizu

A video/sound signal switching and distributing device makes connections to a plurality of video/sound signal receiving devices to be connected at startup of a system and performs authentication between itself and the plurality of video/sound signal receiving devices, thereby acquiring key selection information about a video/sound signal transmitting device and holding the key selection information. Even when another video/sound signal receiving device is connected to the video/sound signal transmitting device while one video/sound signal is already in the middle of displaying a view of the video/sound signal, the video/sound signal transmitting device and the video/sound signal switching and distributing device can again establish a connection without redoing mutual authentication. Hence, disconnection and re-connection of the video/sound signal can be performed without interruption of the video/sound signal being displayed for viewing purpose.

Video/sound signal transmitting system and video/sound signal switching and distributing device

An in-vehicle recording/reproduction device () records in a recording device a program which the user starts watching, and reads and reproduces the data when watching is permitted, such as, for example, when a vehicle is stopped. The in-vehicle recording/reproduction device () transmits recording information about recording, such as a program, a time, and the like, to an in-home recording/reproduction device (). The in-home recording/reproduction device () records the same program as that recorded by the in-vehicle recording/reproduction device () based on the recording information. The in-vehicle recording/reproduction device () transmits to the in-home recording/reproduction device () reproduction information indicating which scene was last reproduced in the in-vehicle recording/reproduction device (). The in-home recording/reproduction device () performs reproduction based on the reproduction information. Thereby, it is possible to watch the rest of the program which was watched in the vehicle, at home without missing a scene.

In-vehicle recording/reproduction device, recording/reproduction device, recording/reproduction system, and recording/reproduction method

Stream data and a command output from a drive device are individually packetized in a first packet processing unit. The stream data packet and the command packet are further multiplexed, and the multiplexed data is transmitted to a transmission path using a synchronous channel. When the command output from a decoding unit is packetized in a second packet processing unit, it is packetized by multiplexing flow control information output from the decoding unit, and is transmitted to the first packet processing unit using a synchronous channel of the transmission path. Based on this flow control information, reading/writing by the drive device is controlled.

Transmission method, sending device and receiving device

A data transmission system maintaining synchronization between transmission and reception even when a transmission apparatus, a reception apparatus and a transmission path do not operate on the same clock. Specifically, data packet is obtained by omitting a preamble and/or a parity from data generated by a data generation means and by adding a data length field and spare bits. The obtained data packet is set as an access unit and is transmitted from a transmission apparatus to a transmission path. A reception apparatus adds, to the received data, the preamble and/or the parity to reconstruct data, and adjusts a rate of a data reading clock for transmitting data from a reception-side buffer means to a data processing means a the basis of an accumulated amount in a clock control means.

Data transmission system, data transmission apparatus, data reception apparatus, and data transmission method

An in-vehicle hands-free apparatus includes: a communication unit which is connected with a mobile phone; a storage unit for storing a voice of a party on the other end of a call; a situation analysis unit for analyzing surrounding situations of a car based on information outputted from a group of sensors for detecting the surrounding situations; an action determination unit for determining, based on the result of the analysis of the situation analysis unit, to continue or hold the call between a driver and the party, or cancel the hold; a playback control unit for playing back the voice of the party stored in the storage unit according to a control signal outputted based on the determination by the action determination unit to cancel the hold; and a voice output unit for outputting the voice played back by the playback control unit for the driver.

In-vehicle hands-free apparatus

In a display system, a projector is mounted inside a vehicle, and emits a light beam, which is generated based on an image signal, toward an opening formed at a portion near a rear end of the vehicle. An exterior screen is extendable toward the opening and is made of a material having low stiffness. While being extended toward the opening, the exterior screen displays an image by allowing the light beam emitted by the projector to pass therethrough. A screen housing unit is mounted on or near one of a rear hatch and a back door of the vehicle for accommodating the exterior screen.

Display system

In a network of a topology of a loop and a bus, occurrence of a failure is detected and a location of the failure is specified. Occurrence of the failure is detected by detecting that a specific signal pattern to be received at regular time intervals within a fixed time period is not received. A node which has detected occurrence of the failure transmits or receives a specifying signal among the nodes, and decide whether or not the failure has occurred adjacently to itself. A packet indicating a decided location of the failure is transmitted or received among nodes, and thereby respective nodes specify the location of the failure. When the failure has occurred at the master node, a node having a smallest node ID after waiting time according to the node ID operates as the alternative master node.

Network system, network terminal, and method for specifying location of failure in network system

There is provided a transmission system which realizes more flexible resource allocation. A resource management means upon receipt of a resource allocation request including a minimum bandwidth and a maximum bandwidth, reduces allocated resources stored in an allocated-resource request table to the corresponding minimum bandwidths. As such, the request is accepted with higher probability. When releasing an allocated resource, the resource management means increases the allocated-resources of the allocated-resource requests to bandwidths within a range of the corresponding maximum bandwidths. Accordingly, the resources are utilized more effectively. When releasing the resource, the resource management means notifies, by broadcast, all the communication apparatuses that free resources are increased. Thus, for the communication apparatus whose request has been rejected, the resource is allocatable.

Transmission system, bandwidth management apparatus, and bandwidth management method

A transmitting system which comprises a transmission line, a transmitting apparatus connected to the transmission line, and a receiving apparatus connected to the transmission line, and transmits data between the transmitting apparatus and the receiving apparatus, wherein the transmitting apparatus comprises packet compressing means which receives input data comprising plural packets having identifiers as an input, identifies packets to be discarded and effective packets according to the identifiers, and outputs compression information indicating the number of continuously discarded packets and the effective packets to the transmission line, and the receiving apparatus comprises packet restoring means which receives the compression information and the effective packets which have been output from the transmitting apparatus, generates ineffective, packets which are as many as the discarded packets, and outputs the ineffective packets and the effective packets.

Transmitting system and transmitting apparatus

A network system includes at least one transmitting apparatus connected to a network for outputting packets containing data to the network and at least one receiving apparatus connected to the network for receiving from the network the packets that have been output from the transmitting apparatuses, the transmitting apparatuses and the receiving apparatuses making up plural transmitting/receiving systems. The network system includes a data packet monitor for monitoring the packets transmitted through the network and detecting the amount of data in the packets to be used in a specified transmitting/receiving system; and band manager for determining a bandwidth on the network to be used by the specified transmitting/receiving system, based on the amount of data in the packets that is detected by the data packet monitor.

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Yokohama, Japan

Toshikazu Hattori