Abstract: To effectively suppress radiation and mixture of noise superimposed on a power line into a connection detection line. A power conversion device includes a connector having a wiring line which transmits DC power; and a housing in which the connector is arranged. The connector has a connection detection wiring line which detects whether the connector is connected with an external circuit. An opening part which connects with the connector is formed in the housing. An annular core formed of a magnetic substance is inserted through the opening part. The annular core is an annular member formed with a through-hole. The wiring line and the connection detection wiring line are introduced into an inside of the housing through the through-hole of the annular core.

Abstract: To achieve reduction in size and reduction in cost of a DC-DC converter apparatus. Rectifier elements and are installed onto a metal base, and a drive circuit board is installed to an upper part of the rectifier element. Each terminal of the rectifier elements and is soldered to the drive circuit board. Three terminals of the rectifier elements are soldered, respectively, to a drive signal wiring pattern, a high-potential-side main current wiring pattern, and a low-potential-side main current wiring pattern of the board. A pair of output terminals of a transformer is connected to at least the pair of high-potential-side main current wiring patterns using high-potential-side metal conductors.

Abstract: There is provided a device in which superimposition of noise radiated from a circuit is reduced, and a noise reducing effect of a filter is ensured. A DC-DC converter according to the present invention includes a transformer, a high voltage-side switching circuit section, a low voltage-side switching circuit section, a noise filter circuit section electrically disposed between the low voltage-side switching circuit section and the low voltage-side circuit section, a metallic case that houses the transformer, the high voltage-side switching circuit section, the low voltage-side switching circuit section, and the noise filter circuit section, a drive circuit board having a drive circuit that drives the low voltage-side switching circuit section, and a metallic base board having the drive circuit board mounted thereon. The case has a metallic partition wall connected to the case. The partition wall is disposed between the low voltage-side switching circuit section and the noise filter circuit section.

Abstract: Provided is a power converter without a crack in a board or peeling-off of a pattern at the time of being grounded to a metal base. A GND protruding terminal is molded in a metal base in an integrated manner. A drive circuit board is provided with rectifier elements, first to third wiring patterns, and a ground pattern. A ground metal conductor, which connects the ground pattern and the metal base, is placed on a top surface of the GND protruding terminal, and is screwed to a female screw portion of the GND protruding terminal.

Abstract: To effectively suppress radiation and mixture of noise superimposed on a power line into a connection detection line. A power conversion device includes a connector having a wiring line which transmits DC power; and a housing in which the connector is arranged. The connector has a connection detection wiring line which detects whether the connector is connected with an external circuit. An opening part which connects with the connector is formed in the housing. An annular core formed of a magnetic substance is inserted through the opening part. The annular core is an annular member formed with a through-hole. The wiring line and the connection detection wiring line are introduced into an inside of the housing through the through-hole of the annular core.

Abstract: Objects of the invention are not to receive influence of an electromagnetic noise from a transformer and to reduce a possibility of breakage caused by shock or vibration. In a DC-DC converter apparatus of the invention, a shielding metal frame 300 is placed between a transformer 250 and a control circuit board assembly 240A housed in a case 101. A plate spring 311 attached to the metal frame 300 is pressed to cores 251 of the transformer 250 to fix the transformer 250 to a bottom portion 101a of the case 101. Heat generated from the transformer 250 is transmitted to the metal frame 300 and the bottom portion 101a of the case 101 and is then radiated.

Abstract: As an object of reducing a noise resulted from the mutual influences between circuit-configuring components, a DC-DC converter includes a high voltage circuit section that is electrically connected to a transformer, a low voltage circuit section that is electrically connected to the transformer, a housing in which the high voltage circuit section and the low voltage circuit section are accommodated, a control circuit board that controls the driving of the low voltage circuit section, and a frame that supports the control circuit board. The frame is arranged on a position facing a bottom surface of the housing while crossing the low voltage circuit section. The housing includes a first wall that separates a first space in which the high voltage circuit section is accommodated and a second space in which circuit components configuring the low voltage circuit section are accommodated. The frame forms a second wall that protrudes toward a direction approaching a leading end of the first wall.

Abstract: There is provided a device in which superimposition of noise radiated from a circuit is reduced, and a noise reducing effect of a filter is ensured. A DC-DC converter according to the present invention includes a transformer, a high voltage-side switching circuit section, a low voltage-side switching circuit section, a noise filter circuit section electrically disposed between the low voltage-side switching circuit section and the low voltage-side circuit section, a metallic case that houses the transformer, the high voltage-side switching circuit section, the low voltage-side switching circuit section, and the noise filter circuit section, a drive circuit board having a drive circuit that drives the low voltage-side switching circuit section, and a metallic base board having the drive circuit board mounted thereon. The case has a metallic partition wall connected to the case. The partition wall is disposed between the low voltage-side switching circuit section and the noise filter circuit section.

Abstract: A DTMF signal processing apparatus of the present invention comprises a data divider unit, a DTMF signal component analyzer unit, a weighting processing unit, a buffer, a DTMF signal erasure determination unit, and a DTMF signal erasure processing unit. The data divider unit divides speech data into a plurality of divided speech data, and the DTMF signal component analyzer unit analyzes whether or not the divided speech data has a DTMF signal component. The weighting processing unit applies a weighting value to divided speech data analyzed at this time and stores the resultant speech data in the buffer, and also applies a weighting value to past divided speech data previously stored in the buffer when the result of the analysis indicates that the analyzed divided speech data has the DTMF signal component. The DTMF signal erasure determination unit determines based on the weighting value whether or not to erase the divided speech data stored in the buffer.

Abstract: A gateway apparatus for conducting connection between different types of communication networks, that are a line-switched network and a packet-switched network, there are provided a method and an apparatus in which sound breaks otherwise caused by delay or loss of speech encoded data is eliminated and deterioration of the speech quality is minimized to assure short delay in speech communication. A speech data processing circuit of the gateway apparatus compares the number of speech encoded data actually acquired with an expected value. The speech data processing circuit packetizes the so generated speech encoded data, along with the speech encoded data, to send the packetized data from a transmission circuit to the packet-switched network. The resulting data is sent from a data multiplexing circuit and a line-switched network terminating circuit to the line-switched network.

Abstract: The audio packet receiver according to the present invention includes a buffer unit (101) for extracting audio coded data from an audio packet and storing the extracted audio coded data into a buffer, and also for detecting the packet loss; a distance calculating unit (102) for calculating the distance between a location in the buffer unit (101) where the packet loss is detected and a location where the next audio coded data is stored; a controlling unit (103) for determining a gain value of the audio data for the concealed audio based on the distance calculated at the distance calculating unit (102); and a decoding unit (104) for performing audio error concealment based on the gain value of the audio data for the concealed audio that is determined by the controlling unit (103).

Abstract: A display apparatus includes a base, a display screen part supported on the base turnably, a driving part for turning the display screen part in accordance with an inputted control signal, a turning prevention mechanism for preventing turning of the display screen part, a judgment part for judging on the basis of the inputted control signal whether the display apparatus is operated or not, and a controller for producing a signal for operating the turning prevention mechanism to prevent turning of the display screen part when it is judged that there is no operation to the display screen part and producing a signal for releasing operation of the turning prevention mechanism when it is judged that there is operation to the display screen part.

Abstract: In media communication by way of a packet-switching network and a circuit-switching network, a protocol conversion device for converting protocols between the packet-switching network and the circuit-switching network includes a call connection unit and a protocol converter. The call connection unit carries out call connection processes of media communication between terminals of the packet-switching network side and terminals of the circuit-switching network side. The protocol converter analyzes packets of speech received from the packet-switching network to specify the encoding bit rate of speech data in the speech packets. The protocol converter then specifies the multiplex table used in multiplexing frames on the circuit-switching network from the encoding bit rate. The protocol converter further generates frames by using the multiplex table that was specified to multiplex data in the payload of packets received from the packet-switching network and transmits to the circuit-switching network.

Abstract: A self-supporting stand for a thin display device is to be controlled so that the display device faces in a preset screen direction in a one-touch manner. A function of constantly recognizing the screen direction of the display device and detecting its own direction by detecting a resistance value of a resistance volume such as a variable resistor installed in an electric screen direction changing mechanism, and a control unit which reproduces a preset screen direction no matter in which direction the screen faces currently, are combined with each other.

Abstract: When media communication is relayed through a circuit switching network and a packet switching network, packet congestion and packet loss is inhibited by limiting the bandwidth and the number of packets on the packet switching network. Audio packets received from the packet switching network are stored in a buffer for absorbing fluctuation on the packet switching network, and it is determined whether an encoded audio stream is acquirable from the buffer. If no acquisition, an encoded audio stream representing either silence or noise information is generated and multiplexed, and the multiplexed data is output to the circuit switching network. Multiplexed data constituted by a plurality of multiplexed encoded streams received from the circuit switching network is separated into respective encoded streams, and only encoded audio streams representing sound or noise information are packetized based on the frame information for the encoded audio streams and sent to the packet switching network.

Abstract: An audio communication device includes a plurality of encoding units and decoding units, and switches the encoding format from one to another according to the useable transmission band or to a user audio quality request or to a delay request. The audio encoded data that is received is decoded by selecting an optimal decoding unit according to the encoding format identifier added to the data or according to set information notified from audio communication device 201 of the communication partner. The audio data decoded is temporality stored in audio data buffer 216 and reproduced. The amount of audio data stored in the audio data buffer is controlled so that audio is reproduced without pause.

Abstract: In a gateway apparatus for conducting connection between different types of communication networks, that are a line-switched network and a packet-switched network, there are provided a method and an apparatus in which sound breaks otherwise caused by delay or loss of speech encoded data is eliminated and deterioration of the speech quality is minimized to assure short delay in speech communication. A speech data processing circuit 550 of the gateway apparatus compares the number of speech encoded data actually acquired with an expected value, that is, the number of speech encoded data, which is the number of the encoded data expected to be output every unit period from a multiplexed data demultiplexing circuit 200. If the number of speech encoded data actually acquired is less than the expected value, the speech data processing circuit generates speech encoded data for a destination terminal of transmission to execute error concealment processing.

Abstract: A display apparatus includes a base, a display screen part supported on the base turnably, a driving part for turning the display screen part in accordance with an inputted control signal, a turning prevention mechanism for preventing turning of the display screen part, a judgment part for judging on the basis of the inputted control signal whether the display apparatus is operated or not, and a controller for producing a signal for operating the turning prevention mechanism to prevent turning of the display screen part when it is judged that there is no operation to the display screen part and producing a signal for releasing operation of the turning prevention mechanism when it is judged that there is operation to the display screen part.

Abstract: A self-supporting stand for a thin display device is to be controlled so that the display device faces in a preset screen direction in a one-touch manner. A function of constantly recognizing the screen direction of the display device and detecting its own direction by detecting a resistance value of a resistance volume such as a variable resistor installed in an electric screen direction changing mechanism, and a control unit which reproduces a preset screen direction no matter in which direction the screen faces currently, are combined with each other.