Display apparatus and method

A display apparatus, comprising:

• a display;
• a control device, in communication with the display;
• and
• at least one processor, connected with the display and the control device, and configured to execute computer instructions to cause the display apparatus to:
• in response to a first command input via the control device from a user, obtain media data of a target channel, wherein the media data comprises an index file and a data segment, and the index file comprises an attribute parameter for describing attribute characteristics of the data segment and encryption data;
• execute a first process and a second process in parallel;
• wherein
• the first process comprises demultiplexing the data segment to obtain Elementary Stream (ES) data, and obtaining first metadata information for describing attribute of the data segment according to the encryption data and first ES data;
• and
• the second process comprises generating second metadata information for describing attribute of the data segment according to the attribute parameter and the encryption data;
• wherein
• both of the first metadata information and the second metadata information are usable for initializing a decoder;
• both of the first metadata information and the second metadata information describe at least audio and video attribute information of the same data segment, and the audio and video attribute information comprises:
• a width and a height of video, a Multipurpose Internet Mail Extensions (MIME) type of video, a MIME type of audio, a sampling rate, and channel information;
• based on that the second metadata information is generated before the first metadata information, initialize the decoder according to the second metadata information;
• determine whether the first metadata information is consistent with the second metadata information;
• based on that the first metadata information and the second metadata information is consistent, decode the ES data via the decoder initialized according to the second metadata information to obtain first decoded ES data;
• based on that the first metadata information and the second metadata information is not consistent, turn off the decoder initialized according to the second metadata information, and reinitialize the decoder according to the first metadata information, and decode the ES data via the decoder reinitialized according to the first metadata information to obtain second decoded ES data;
• based on that the first metadata information is generated before the second metadata information, initialize the decoder according to the first metadata information and terminate the second process, and decode the ES data via the decoder initialized according to the first metadata information to obtain third decoded ES data;
• and
• display a program image of the target channel on the display according to one of the first decoded ES data, the second decoded ES data, and the third decoded ES data.