Display apparatus and signal transmission method for display apparatus

A display apparatus, comprising:

• a display;
• and
• a controller;
• wherein the controller is provided with a voice assistant application and is configured to:
• receive, by the voice assistant application, a user voice, wherein the user voice comprises one of a channel name and a channel number;
• send the user voice to a voice assistant server;
• in response to a channel switch instruction sent from the voice assistant server according to the user voice, receive an audio and video signal transmitted by a channel corresponding to the channel switch instruction;
• and
• play the audio and video signal from the channel corresponding to the channel switch instruction;
• wherein the controller is further configured to:
• count how many times a channel has been called;
• and
• write corresponding channel numbers and/or channel names and channels into a channel list in descending order in terms of the times the channel has been called, and
• wherein the controller is further configured to:
• traverse the channel list in response to the channel switch instruction;
• while traversing the channel list, calculate similarities between the channel switch instruction and channel names in the channel list or between the channel switch instruction and channel numbers in the channel list;
• compare a calculated similarity with a preset similarity;
• in response to a first similarity being greater than the preset similarity, terminate the traversing of the channel list before using a first channel corresponding to the first similarity as the channel corresponding to the channel switch instruction;
• and
• in response to no calculated similarity being greater than the preset similarity after the traversing of the channel list, control the display apparatus to display alert information indicating that no channel matched with the user voice is found for a user.