Switching method for audio output channel, and display device

A display apparatus, comprising:

• a display configured to present an image and/or a user interface;
• one or more HDMI ports, configured to connect with one or more external devices, wherein the one or more external devices comprise an external power amplifier, an audio output channel of the external power amplifier comprises an Audio Return Channel, ARC and/or an enhanced Audio Return Channel, eARC;
• a sound speaker configured to play audio;
• a memory configured to store instructions and data associated with the display;
• at least one processor in connection with the display, the one or more HDMI ports, the sound speaker and configured to execute the instructions to cause the display apparatus to perform:
• in response to a switch operation for switching the audio output channel of the external power amplifier, obtaining a first state value corresponding to the switch operation, wherein the first state value is used for indicating an ON/OFF state of the eARC specified by the switch operation;
• adjusting a connection state of the ARC and a connection state of the eARC according to the first state value, and determining a target channel for outputting audio according to an adjusting result, and displaying the ON/OFF state of the eARC matching with the target channel;
• wherein the at least one processor is configured to execute the instructions to cause the display apparatus to perform:
• in response to the switch operation being for switching the eARC from the OFF state to the ON state, recording the first state value as ‘on’;
• in response to the switch operation being for switching the eARC from the ON state to the OFF state, recording the first state value as ‘off’;
• in response to the first state value being detected as ‘on’, causing a driver layer to connect with eARC channel and disconnect with ARC channel;
• generating a second state value according to an adjusting result of the driver layer, and reporting the second state value to a framework layer of the display apparatus so as to cause the framework layer to implement a channel-switch control logic, wherein the second state value is used for indicating a connection state of the eARC;
• wherein the channel-switch control logic is configured to:
• in response to the second state value being detected as ‘on’, determine that the target channel is the eARC channel and control the display to change a switch control of the eARC to be the ON state;
• in response to the second state value being detected as ‘off’, determining that the target channel is the ARC channel, reestablishing a connection with the ARC channel, and controlling the display to set the switch control of the eARC as the OFF state;
• wherein in response to eARC connection failure, eARC connection timeout, or detecting that the external power amplifier does not support the eARC while connecting with the eARC, the second state value is set to ‘off’.