Method and device for transmitting/receiving media data
A method for processing a content by a set-top box according to an embodiment of the present disclosure comprises the steps of: receiving a content including an audio stream; and performing bypassing to output the audio stream to a television (TV) through an output interface without performing a decoding operation for the audio stream, wherein the audio stream includes metadata regarding the content.
1. A method for processing data in a television (TV) device, the method comprising:
receiving an audio stream comprising metadata delivered from a set-top box to the TV device, extracting the metadata from the audio stream, modifying the extracted metadata to process the metadata, delivering information for presenting media data to a media player if the metadata includes the information for presenting the media data, and delivering information for obtaining media data to a media transmission processor if the metadata includes the information for obtaining the media data;
obtaining the media data through predetermined interface and protocol by using the information for obtaining the media data;
decoding the obtained media data; and
presenting the decoded media data by using the information for presenting the media data.
2. The method of claim 1 , further comprising:
extracting a Moving Picture Experts Group (MPEG) media transport (MMT) signaling message from an MMT protocol (MMTP) packet if the metadata is the MMTP packet comprising the MMT signaling message; and
obtaining content corresponding to an identifier by using the identifier of the content if the metadata is the identifier of the content.
3. A television (TV) device for processing data, the TV device 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 device 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 presenting media data to a media player if the metadata includes the information for presenting the media data, and to deliver information for obtaining media data to a media transmission processor if the metadata includes the information for obtaining the media data;
the media transmission processor configured to obtain the media data through a predetermined interface and protocol by using the information for obtaining the media data and to deliver the obtained media data to a decoder;
wherein the TV device further comprises:
the decoder configured to decode the obtained media data; and
the media player configured to present the decoded media data by using the information for presenting the media data.
4. The TV device of claim 3 , wherein the metadata analyzer is further configured to extract a Moving Picture Experts Group (MPEG) media transport (MMT) signaling message from an MMT protocol (MMTP) packet if the metadata is the MMTP packet comprising the MMT signaling message, and
the media transmission processor is further configured to obtain content corresponding to an identifier by using the identifier of the content if the metadata is the identifier of the content.