Sony Corporation

Masaki Kitano

Gen Ichimura

Toshihide Hayashi

Kazumoto Kondo

Hidekazu Kikuchi

Yasuhisa Nakajima

Takehiko Saito

Hiroyuki Shigei

Shigehiro Kawai

Masaaki Takesue

Takehiko Saitou

An external device may recognize, in the case of including a communication unit that executes communication via a communication path made up of a pair of differential transmission paths included in a transmission path, information relating to the communication unit thereof. A disk recorder transmits function information indicating that a communication unit (high-speed data line I/F) configured to execute communication with an external device via a communication path made up of a reserve line and an HPD line of an HDMI cable to a television receiver via a CEC line that is a control data line of the HDMI cable. The television receiver receives function information, whereby whether or not the disk recorder is an eHDMI-compatible device can be determined, and in the case of an eHDMI-compatible device, a compatible transmission format (application) can be recognized.

Transmission device and reception device

[Object] To enable an external device to recognize, in the case of including a communication unit configured to execute communication via a communication path made up of a pair of differential transmission paths included in a transmission path, information relating to the communication unit thereof. [Solving means] A disk recordertransmits function information indicating that a communication unit (high-speed data line I/F) configured to execute communication with an external device via a communication path made up of a reserve line and an HPD line of an HDMI cableto a television receivervia a CEC line that is a control data line of the HDMI cable. The television receiverreceives function information, whereby whether or not the disk recorderis an eHDMI-compatible device can be determined, and in the case of an eHDMI-compatible device, a compatible transmission format (application) can be recognized. It can also be conceived to transmit the function information from the television receiverto the disk recorderin the same way as described above.

To discriminate whether a cable in conformity with a conventional standard or a cable in conformity with a new standard is connected. An HPD signal line () has, on an expanded HDMI sink apparatus () side circuit, a pull-up resistor () between the HPD signal line () and a voltage supply and a pull-down resistor () between the HPD signal line () and the ground, and a reserved line () has, on the expanded HDMI sink apparatus () side circuit, a pull-down resistor () between the reserved line () and a ground, and within a new HDMI cable (), a pull-up resistor () between the reserved line () and a voltage supply of an expanded HDMI source apparatus (). The expanded HDMI sink apparatus compares a voltage at a test point () on the reserved line () on the expanded HDMI sink apparatus () side with a reference voltage by using a voltage comparator (). A CPU of the expanded HDMI sink apparatus () determines, when an output from the voltage comparator () is High, a normal state where the new HDMI cable () is inserted, and when an output from the voltage comparator () is Low, determines a state where a conventional HDMI cable () is erroneously inserted.

Electronic apparatus and cable device

A video display device includes: connectors to which cables transmitting video signals are connected; a display panel displaying video by the video signal inputted to the connector from an external device through the cable; a display control unit displaying connector indications indicating the connectors on the display panel; a cable detection unit outputting a step waveform signal to the connector and detecting connection/disconnection of the cable to the connector based on a reflected signal of the step waveform signal, and wherein the display control unit changes the appearance of the connector indications displayed on the display panel according to a detection output of the cable detection unit.

Video display device, method of displaying connectors, transmission-line state detection device, transmission line-state detection method and semiconductor integrated circuit

To provide an electronic apparatus capable of easily detecting a terminal that forms a loop connection state with a simplified configuration. A control unit counts the number of broadcast packet supplied from a switching hub to a communication unit within a predetermined time period and determines whether the number of packets exceeds a threshold value (ST, ST). If the number of packets exceeds the threshold value, the control unit determines that an abnormal connection state occurs, that is, a loop is detected and starts a process in which the control unit identifies a network terminal that forms the loop connection state (ST, ST). The control unit counts the number of broadcast packets that reach each of the network terminals, that is, broadcast packets input to each port of the switching hub. Thereafter, the control unit determines whether the network terminal that has received the number of packets exceeding the threshold value is present, that is, whether an abnormally connected terminal is present (ST, ST). If an abnormally connected terminal is present, the control unit displays a message indicating abnormal connection, the abnormally connected terminal, and a message prompting connection change (ST).

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Tokyo, Japan

Masaki Kitano