Display apparatus, video signal transmission method for display apparatus, transmitting apparatus, and transmission method of video signal
Provided is a display apparatus including a first signal receiving unit that receives a non-compressed video signal from an external device via a first transmission path through a plurality of channels by means of a differential signal, an image display unit that displays images by processing the video signal received by the first signal receiving unit, a second signal receiving unit that receives a compressed video signal of a same video source as the non-compressed video signal by using a bi-directional communication path configured by predetermined lines of the first transmission path, and a signal transmitting unit that transmits a compressed video signal corresponding to the compressed video signal received by the second signal receiving unit to another external device different from the external device.
1. A signal transmitting method for an apparatus including:
receiving an uncompressed video signal from an external device via a plurality of channels comprised in a transmission path by a differential signal;
transmitting a first signal to the external device via a reserved line and a Hot Plug Detect (HPD) line, which are bi-directional for transmission, comprised in the transmission path by a full duplex communication, in which the reserved line and the HPD line are of a High Definition Multimedia Interface (HDMI) cable and can form another differential signal;
receiving a second signal from the external device via the reserved line and the HPD line;
subtracting the first signal from the second signal to obtain a third signal; and
transmitting a notification of a connection state to the external device by at least one DC bias potential of the reserved line and the HPD line.
2. A signal transmitting method for an apparatus, the method comprising:
transmitting an uncompressed video signal to an external device via a plurality of channels comprised in a transmission path by a differential signal;
transmitting a first signal to the external device via a reserved line and a Hot Plug Detect (HPD) line, which are bi-directional for transmission, comprised in the transmission path by a full duplex communication, in which the reserved line and the HPD line are of a High Definition Multimedia Interface (HDMI) cable and can form another differential signal;
receiving a second signal from the external device via the reserved line and the HPD line;
subtracting the first signal from the second signal to obtain a third signal; and
receiving a notification of a connection state from the external device by at least one DC bias potential of the reserved line and the HPD line.
3. An apparatus comprising:
a first transmitter that transmits an uncompressed video signal to an external device via a plurality of channels comprised in a transmission path by a differential signal;
a second transmitter that transmits a first signal to the external device via a reserved line and a Hot Plug Detect (HPD) line, which are bi-directional for transmission, comprised in the transmission path by a full duplex communication, in which the reserved line and the HPD line are of a High Definition Multimedia Interface (HDMI) cable and can form another differential signal;
a first receiver that receives a second signal from the external device via the reserved line and the HPD line;
a subtracting unit that subtracts the first signal from the second signal to obtain a third signal; and
a second receiver that receives a notification of a connection state from the external device by at least one DC bias potential of the reserved line and the HPD line.