Signal transmission method and apparatus

An apparatus, which is a slave clock apparatus or included in the slave clock apparatus, wherein the apparatus comprises:

• at least one processor;
• and
• at least one memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the apparatus to perform operations comprising:
• obtaining a video signal, wherein the video signal comprises 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;
• multiplexing the vertical blanking packet, the horizontal blanking packet, and the active video packet into a video stream for sending;
• obtaining, based on the pixel clock signal and the display enable signal, descriptive information in a blanking interval in the video data signal;
• and
• encapsulating a descriptive information packet based on the descriptive information;
• and
• wherein multiplexing the vertical blanking packet, the horizontal blanking packet, and the active video packet into the video stream for sending comprises:
• multiplexing the vertical blanking packet, the horizontal blanking packet, the active video packet, and the descriptive information packet into the video stream for sending.

An apparatus, which is a slave clock apparatus or included in the slave clock apparatus, wherein the apparatus comprises:

• at least one processor;
• and
• at least one memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the apparatus to perform operations comprising:
• receiving a video stream, wherein the video stream comprises a vertical blanking packet, a horizontal blanking packet, and an active video packet;
• generating a vertical synchronization signal based on the vertical blanking packet;
• generating a horizontal synchronization signal based on the horizontal blanking packet;
• generating a video data signal and a display enable signal based on the vertical synchronization signal, the horizontal synchronization signal, a pixel clock signal, and active video data carried in the active video packet;
• and
• outputting a video signal, wherein the video signal comprises the vertical synchronization signal, the horizontal synchronization signal, the pixel clock signal, the display enable signal, and the video data signal;
• and
• wherein the video stream further comprises a descriptive information packet, and wherein generating the video data signal and the display enable signal based on the vertical synchronization signal, the horizontal synchronization signal, the pixel clock signal, and the active video data carried in the active video packet comprises:
• generating the video data signal and the display enable signal based on the vertical synchronization signal, the horizontal synchronization signal, the pixel clock signal, the active video data carried in the active video packet, and descriptive information carried in the descriptive information packet.