Transmitting method, receiving method, transmitting device, and receiving device for audio and video data in long-distance transmission

A receiving method for audio and video data in a long-distance transmission, comprising:

• obtaining, by the receiving device, a first protocol data stream via a second transmission medium interface;
• processing, by the receiving device, the first protocol data stream to obtain a second preset protocol data stream and second preset audio and video data;
• and
• outputting, by the receiving device, the second preset protocol data stream via a third transmission medium interface and outputting, by the receiving device, the second preset audio and video data via a second high definition multimedia interface (HDMI).

A receiving device for audio and video data in a long-distance transmission, comprising:

• a second memory configured to store second application instructions;
• and
• a second processor coupled to the second memory configured to call the second application instructions to:
• process a first protocol data stream via a second transmission medium interface to obtain a second preset protocol data stream, and second preset audio and video data;
• wherein the second preset protocol data stream is outputted via a third transmission medium interface, and the second preset audio and video data is outputted via a second high definition multimedia interface (HDMI).