Abstract: A digital data transmission apparatus includes a transmitting end (100) that includes: a binary/quadrary conversion unit (110) for converting a data stream; a coding unit (120) for mapping the converted data to be coded; a digital filter (130); a D/A conversion unit (140); a low-pass filter (150) for eliminating a high-band signal; a differential driver (160) for inputting an analog signal that has passed through the low-pass filter into a twisted pair cable (300), and a receiving end (200) that includes: a low-pass filter (210) for eliminating noises from both wires of the twisted pair cable; a receiver (220) for receiving the signals that have passed through the low-pass filter; an A/D conversion unit (230); a digital filter (240); an evaluation unit (250) for evaluating a signal level of a received signal; a decoding unit (260) for decoding the signal level into receipt data; and a synchronization unit (270) for generating a clock.

Abstract: A digital data transmission apparatus includes a transmitting end (100) that includes: a binary/quadrary conversion unit (110) for converting a data stream; a coding unit (120) for mapping converted data to be coded; a digital filter (130); a D/A conversion unit (140); a low-pass filter (150) for attenuating noises which are caused by folding distortion; a differential driver (160); low-pass filters (170a) and (170b) for eliminating noises from differentially outputted signals; and a common mode choke coil (180) for eliminating common mode noises and outputting a resultant signal to a twisted pair cable (300), and a receiving end (200) that includes: a low-pass filter (210) for eliminating noises from the twisted pair cable; a receiver (220); an A/D conversion unit (230); a digital filter (240); an evaluation unit (250) for evaluating a signal level of a received signal; a decoding unit (260) for decoding the signal level into received data; and a synchronization unit (270) for generating a clock.

Abstract: It is an object to provide an evaluation level setting method for accurately evaluating signal levels, and a data reception apparatus, in multi-valued transmission for transmitting data while assigning one or more bits of data as one data symbol to a signal level.

Abstract: There is provided a transmission system which realizes more flexible resource allocation. A resource management means 12, 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 13 to the corresponding minimum bandwidths. As such, the request is accepted with higher probability. When releasing an allocated resource, the resource management means 12 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 12 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.

Abstract: A communication system, a vehicle-mounted communication system, a communication device, and a vehicle-mounted device, which can easily and simultaneously set plural devices which are connected by a network. A communication terminal (server) comprises a storage medium interface to or from which a storage medium can be inserted or removed, and each of a plurality of devices comprises a control means for controlling reading of setting information from the storage medium which has been inserted into the storage medium interface of the communication terminal (server) or writing of the setting information to the storage medium, via a network, and a setting part for setting the self-device on the basis of the setting information read from the storage medium.

Abstract: A hands-free device 1 comprises a cellular phone 90 of a driver, driver's speakers 11e that output sounds to the driver, front speakers 11a and 11b and rear speakers 11c and 11d that output sounds widely in a car, a detection unit 13 that outputs a detection signal to indicate whether there is a fellow passenger in the car or not, and control equipment 10 that communicate with the cellular phone 90, in the case that the control equipment 10 receives telephone communication voice signal indicating telephone conversation voice of other party of the telephone conversation from the cellular phone 90, based on the detection signal outputted from the detection unit 13, when the control equipment 10 judges that there is no fellow passenger, the control equipment has the telephone conversation voice outputted mainly from the front speakers 11a and 11b and the rear speakers 11c and 11d, and when the control equipment judges that there is a fellow passenger, the control equipment has the telephone conversation voice ou

Abstract: A bidirectional remote control system including a bidirectional remote controller and first and second devices controlled thereby, wherein the first device is for receiving a request of device information from the bidirectional remote controller and for sending the device information to the bidirectional remote controller. The bidirectional remote controller is also for sending the request of the device information to the first device, receiving the device information from the first device and sending the device information to the second device, which is for receiving the device information from the bidirectional remote controller.

Abstract: A hands-free device 130 includes the following units: a communication unit 131 that obtains an MAC address of a portable terminal device 110 from the portable terminal device 110; an address storing unit 133 that registers one of MAC addresses obtained by the communication unit 131 into the address storing unit 133 itself in response to a registration trigger signal; and a control unit 136 that reads the registered MAC address from the address storing unit 133 and specifies a portable terminal device 110, which has the read registered address, as a communication target device in response to a search trigger signal.

Abstract: A disc playback system comprising a disc drive for reading a coded signal recorded on a disc type recording medium, and transmitting the coded signal through a synchronous channel of a digital bus, and plural display units each receiving the coded signal from the digital bus, and decoding and displaying the coded signal, wherein each of the plural display units outputs disc control information including a read command for controlling the disc drive so as to read the coded signal from the disc type recording medium, and one of the plural display units receives the disc control information from the other display units, and the display unit receives, at least as for the read command, the read commands from all of the other display units which are operating and, thereafter, outputs one read command to the disc drive. Therefore, all of the display units performing display operations can display the same picture at the same time.

Abstract: The moving image encoding device for encoding a plurality of moving image signals of this invention includes: a plurality of encoding sections for encoding the plurality of moving image signals, the encoding sections being provided with a plurality of quantization sub-sections for quantizing the plurality of moving image signals with predetermined quantization widths; and a quantization control section for controlling the quantization widths used by the quantization sections simultaneously.

Abstract: A handsfree video phone system that includes a video phone terminal 106 and a car device in which a microphone 101, a speaker 102, a camera 103 are connected with an instrument panel 105 via a cable 104. The video phone terminal 106 is connected with the instrument panel 105 via a wireless communication medium 107. When the video phone terminal 106 is brought into the vehicle, the instrument panel 105 informs the video phone terminal 106 of the attribute information on the system structure. According to the attribute information, the video phone terminal 106 switches the paths of multiplexed audio-video data so as to replace a microphone, a speaker, a camera, and a display that have been built in the video phone terminal 106 with the microphone 101, the speaker 102, the camera 103, and a display of the instrument panel 105 when the status changes to the communication status.

Abstract: An user interface apparatus that receives a user operation of an electrical device and notifies the electrical device of the instruction to execute an action according to the user operation predicts at least one action, the execution of which is supposed to be desired by the user, provides a user interface for having the user designate one action out of the at least one action, and receives a designation by the user. When receiving the user designation, the user interface apparatus notifies the electrical device of the instruction to execute the action that has been designated by the user.

Abstract: The present invention provides a communication system, a vehicle-mounted communication system, a communication device, and a vehicle-mounted device, which can easily and simultaneously set plural devices which are connected by a network. A communication terminal (server) 11 comprises a storage medium interface 112 to or from which a storage medium 111 can be inserted or removed, and each of devices 12a to 12c comprises a control means 122 for controlling reading of setting information 115 from the storage medium 111 which has been inserted into the storage medium interface 112 of the communication terminal (server) 11 or writing of the setting information 115 to the storage medium 111, via a network 15, and a setting means 124 for setting the self-device on the basis of the setting information 115 read from the storage medium 111.

Abstract: A master station 11 produces a token packet for isochronous data in which a slave station 12 and slave stations 13 and 14 serving as a sending station and receiving stations are designated using IDs for isochronous data “#2” and “#3” in accordance with contents described in a table 161 held in its inner part so as to manage a transmission bandwidth using a token packet sending/analysis executing device 16, and sends out the produced token packet to a transition path 15 on the downstream side. The slave station 12 sends out an isochronous data packet 42 using the token packet for isochronous data 41. According to the token packet for isochronous data 41, the slave stations 13 and 14 are designated as receiving stations using the ID for isochronous data “#3”, so that the slave stations 13 and 14 perform the above-mentioned operations, to receive the isochronous data packet 42.

Abstract: A remote control system for controlling an electronic device includes a remote controller and a remote control interface. The remote controller includes a memory for storing a plurality of control data respectively indicating the relationship between a plurality of control signals and functions of the electronic device corresponding to the plurality of control signals; a trigger signal transmitter for transmitting a trigger signal for causing the electronic device to transmit a response signal which is specific to the type of the electronic device; a receiver for receiving the response signal; and a control signal transmitter for selecting control data specific to the type of the electronic device from the plurality of control data based on the response signal, generating one of the control signals, and transmitting the generated control signal.

Abstract: A remote control system for controlling an electronic device includes a remote controller and a remote control interface. The remote controller includes a memory for storing a plurality of control data respectively indicating the relationship between a plurality of control signals and functions of the electronic device corresponding to the plurality of control signals; a trigger signal transmitter for transmitting a trigger signal for causing the electronic device to transmit a response signal which is specific to the type of the electronic device; a receiver for receiving the response signal; and a control signal transmitter for selecting control data specific to the type of the electronic device from the plurality of control data based on the response signal, generating one of the control signals, and transmitting the generated control signal.

Abstract: A master station including at least a token packet (Iso) management table in which the overall band of the bus is partitioned into certain bands, rewrites the token packet (Iso) management table according to the bandwidth required in Isochronous data transmission between stations to at least control transmission of token packets (Iso) and dynamically control the bandwidth.

Abstract: A moving picture compressed signal changeover apparatus changes over from a first moving picture compressed signal containing intra-frame coded frames, forward prediction coded frames and bidirectional prediction coded frames to a second moving picture compressed signal containing intra-frame coded frames, forward prediction coded frames and bidirectional prediction coded frames such that a frame of the first moving picture compressed signal occurring just before an intra-frame coded frame or a forward prediction coded frame of the first moving picture compressed signal is connected to an intra-frame coded frame of the second moving picture compressed signal. A predetermined signal which is different from the first and second moving picture compressed signals may be inserted between the connected frames of the first and second moving picture compressed signals. Alternatively, at least one of the first and second moving picture compressed signals may be delayed so as to adjust a connecting timing.

Abstract: A television system which includes a television set with cathode-ray tube, a VCR deck, a disc player, a tape deck and a radio tuner in one unit operated and controlled by a single remote control device. The cathode-ray tube displays a menu including a guide to help one use the remote control device. The television system also includes automatically selecting a preset or use determined favorite device, e.g. television set, and/or a channel when the system is turned on.