An original blanking period of a video signal is shortened to a set blanking period, and audio data is multiplexed into a resulting superimposing period. Table distinguishing data indicating the length of the superimposing period is inserted into the period as a blanking signal. With this configuration, it is possible to enable transmission and reception of an audio signal in a system capable of transmitting and receiving a video signal.

An original blanking period of a video signal is shortened to a set blanking period, and audio data is multiplexed into a resulting superimposing period. Table distinguishing data indicating the length of the superimposing period is inserted into the period as a blanking signal. With this configuration, it is possible to enable transmission and reception of an audio signal in a system capable of transmitting and receiving a video signal.

An HDMI source determines whether or not an HDMI sink can receive a sub-signal based on VSDB of E-EDID. When the HDMI sink can receive the sub-signal, the HDMI source adds a sub-signal to pixel data of a main image composed of pixel data whose number of bits is smaller than that of transmission pixel data transmitted by a transmitter, thereby constructing transmission pixel data. This data is transmitted by the transmitter through TMDS channels #0 to #2. Furthermore, the HDMI source transmits a general control packet containing sub-signal information indicating whether or not the sub-signal is contained in the transmission pixel data in the control period of a vertical blanking period. The present invention can be applied to, for example, HDMI.

An HDMI source determines whether or not an HDMI sink can receive a sub-signal based on VSDB of E-EDID. When the HDMI sink can receive the sub-signal, the HDMI source adds a sub-signal to pixel data of a main image composed of pixel data whose number of bits is smaller than that of transmission pixel data transmitted by a transmitter, thereby constructing transmission pixel data. This data is transmitted by the transmitter through TMDS channels #0 to #2. Furthermore, the HDMI source transmits a general control packet containing sub-signal information indicating whether or not the sub-signal is contained in the transmission pixel data in the control period of a vertical blanking period. The present invention can be applied to, for example, HDMI.

A video receiver receives a security level of a video source. The security level is stored in a blanking region of a video transmission. The video receiver compares the security level of the video transmission with a security level stored in the video receiver. The video transmission is processed as a function of the comparison of the security level of the video transmission with the security level of the video receiver.

A video receiver receives a security level of a video source. The security level is stored in a blanking region of a video transmission. The video receiver compares the security level of the video transmission with a security level stored in the video receiver. The video transmission is processed as a function of the comparison of the security level of the video transmission with the security level of the video receiver.

The present disclosure relates to signal transmission methods and apparatuses. One example method includes obtaining a video signal, where the video signal includes a vertical synchronization signal, a horizontal synchronization signal, a pixel clock signal, a display enable signal, and a video data signal, obtaining active video data in the video data signal based on the pixel clock signal and the display enable signal, encapsulating a vertical blanking packet based on the vertical synchronization signal, encapsulating a horizontal blanking packet based on the horizontal synchronization signal, encapsulating an active video packet based on the active video data, and multiplexing the vertical blanking packet, the horizontal blanking packet, and the active video packet into a video stream for sending.

The present disclosure relates to signal transmission methods and apparatuses. One example method includes obtaining a video signal, where the video signal includes a vertical synchronization signal, a horizontal synchronization signal, a pixel clock signal, a display enable signal, and a video data signal, obtaining active video data in the video data signal based on the pixel clock signal and the display enable signal, encapsulating a vertical blanking packet based on the vertical synchronization signal, encapsulating a horizontal blanking packet based on the horizontal synchronization signal, encapsulating an active video packet based on the active video data, and multiplexing the vertical blanking packet, the horizontal blanking packet, and the active video packet into a video stream for sending.

The present invention relates to an image display device. An image display device according to one embodiment of the present invention comprises a display, and a signal processing device that outputs data to the display, wherein a first interface in the signal processing device comprises a first terminal and a second terminal for bidirectional communication, and at least one of the first terminal and the second terminal shares an interface monitor signal and a system control bus signal. Accordingly, it is possible to perform integrated support of control data and the like, and thus cable wiring can be simplified.

The present invention relates to an image display device. An image display device according to one embodiment of the present invention comprises a display, and a signal processing device that outputs data to the display, wherein a first interface in the signal processing device comprises a first terminal and a second terminal for bidirectional communication, and at least one of the first terminal and the second terminal shares an interface monitor signal and a system control bus signal. Accordingly, it is possible to perform integrated support of control data and the like, and thus cable wiring can be simplified.