Switching method for audio output channel, and display apparatus

A display apparatus, comprising:

• a display configured to display an image from broadcasting system or network, and/or, a user interface;
• one or more high-definition multimedia interface (HDMI) ports configured to connect with one or more external power amplifiers, an audio output channel of an external power amplifier supports an audio return channel (ARC) and/or an enhanced audio return channel (eARC);
• a sound playing device configured to play audio;
• a memory, configured to store computer instructions and data associated with the display, the one or more HDMI ports and the sound playing device, and
• a processor, in connection with the display, the one or more HDMI ports, the sound playing device and the memory and configured to execute the computer instructions to cause the display apparatus to perform:
• in response to a switching operation for switching the audio output channel of the external power amplifier, acquiring a first state corresponding to the switching operation, wherein the first state is configured to indicate on-off state of the eARC that is designated by the switching operation;
• and
• adjusting connection states of the ARC and the eARC according to the first state, determining a target channel for audio output according to an adjustment of the connection state of the ARC and the eARC, and displaying the on-off state of the eARC that matches the target channel;
• wherein the processor is further configured to execute the computer instructions to cause the display apparatus to perform:
• in response to a start instruction of the display apparatus, acquiring a drive source for causing the display apparatus to start, wherein the drive source comprises a CEC wake-up instruction sent from an external device, a key on a remote controller and a switch key on a body of the display apparatus;
• in response to the drive source being an HDMI source, sending a target device request to one or more external devices according to an HDMI protocol, wherein the target device request is configured to request a first external device currently in an active state from the one or more external devices;
• in response to receiving a response message as a reply to the target device request from the first external device, switching a video source of the display apparatus to a signal source that corresponding to the response message;
• displaying a start interface according to data output from the video source upon completion of the start of the display apparatus;
• and
• in response to the drive source being not the HDMI source, configuring the display apparatus as a target device, and not switching the video source to maintain the video source as a TV source;
• and displaying a home interface upon the completion of the start of the display apparatus.