Sony Corporation

Masaaki Takesue

Yasuhisa Nakajima

Takehiko Saito

Ban Kawamura

Hiroyuki Shigei

Masaki Kitano

Mitsuru Nakada

Object To transmit well a video signal of a desired bit rate within a transfer bit rate of a transfer path. Solving Means A control unitcontrols the operation of data compression units-through-and switch unit. When the bit rate BR of a non-compressed video signal output from a codecis within the transfer bit rate BRof an HDMI transfer path, the control unitsupplies the non-compressed video signal output from the codecto the HDMI transmitting unitas a video signal to be transmitted. On the other hand, when the bit rate BRis greater than the bit rate BR, the control unitselects a compression method that can be handled on the receiving side performs compression processing so that the bit rate BRbecomes lower than the bit rate BR, and supplies the compression video signal to the HDMI transmitting unitas a video signal to be transmitted. Also, the control unittransmits compression information (control information of the switch unitand data compression units-through-).

Video signal transmitting device, video signal transmitting method, video signal receiving device, and video signal receiving method

A switch circuit includes: a first charge/discharge circuit having a fixed first time constant; a second charge/discharge circuit having a second time constant associated with the operation statuses of a plurality of switches; first and second input/output ports to which the first and second charge/discharge circuits are connected, respectively; and a control section adapted to measure the first and second time constants by charging or discharging the first and second charge/discharge circuits and determine the operation statuses of a plurality of switches based on the ratio of the measured first and second time constants.

Switch 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

Masaaki Takesue