Method and device for transmitting/receiving media data

A method for playing back content in a television (TV), the method comprising:

• receiving an audio stream comprising metadata delivered from a set-top box to the TV, extracting the metadata from the audio stream, modifying the extracted metadata to process the metadata, delivering information for playing back media data to a player if the information for playing back the media data exists in the metadata, and delivering information for obtaining media data to a media transmission processor if the information for obtaining the media data exists in the metadata;
• obtaining the media data through predetermined interface and protocol by using the information for obtaining the media data;
• decoding the obtained media data;
• and
• playing back the decoded media data by using the information for playing back the media data.

A television (TV) for processing content, the TV comprising:

• a metadata processor configured to process metadata,
• wherein the metadata processor comprises:
• a metadata extractor configured to receive an audio stream comprising metadata delivered from a set-top box to the TV and to extract the metadata from the audio stream;
• a metadata analyzer configured to modify the extracted metadata to process the metadata, to deliver information for playing back media data to a player if the information for playing back the media data exists in the metadata, and to deliver information for obtaining media data to a media transmission processor if the information for obtaining the media data exists in the metadata;
• the media transmission processor configured to obtain the media data through predetermined interface and protocol by using the information for obtaining the media data and to deliver the obtained media data to a decoder;
• the decoder configured to decode the obtained media data;
• and
• a media player configured to play back the decoded media data by using the information for playing back the media data.