Apparatus and method for providing object based audio file, and apparatus and method for playing back object based audio file

An apparatus for playing back an object based audio file, the apparatus comprising:

• an audio file receiver to receive the object based audio file comprising a file header for an object based audio service, a frame corresponding each of audio objects, and a frame corresponding a audio source in which all of the audio objects are mixed;
• and
• an audio file playback unit to play back the object based audio file by controlling, based on a specification of the object based audio file playback apparatus, the audio source in which all of the audio objects are mixed.

A method of playing back an object based audio file, performed by an object based audio file playback apparatus, the method comprising:

• decoding at least one down-mixed audio track in the object based audio file;
• and
• selecting and playing back the at least one down-mixed audio track.

A method of playing back an object based audio file, performed by an object based audio file playback apparatus, the method comprising:

• decoding at least one audio track for each audio object, included in the object based audio file;
• and
• playing back an audio track selected by a user from the at least one audio track for each audio object.

An apparatus for playing back an object based audio file, the apparatus comprising:

• an audio file decoding unit to decode at least one down-mixed audio track in the object based audio file;
• and
• an audio file playback unit to select and play back the at least one down-mixed audio track.

An apparatus for playing back an object based audio file, the apparatus comprising:

• an audio file decoding unit to decode at least one audio track for each audio object, included in the object based audio file;
• and
• an audio file playback unit to play back an audio track selected by a user from the at least one audio track for each audio object.

An apparatus for playing back an object based audio file, the apparatus comprising:

• an audio file decoding unit to decode a plurality of audio tracks for each of a plurality of audio objects, at least one down-mixed audio track in which the plurality of audio objects is down mixed, and an audio track for enhancing sound quality, included in the object based audio file,;
• and
• an audio file playback unit to estimate an audio object excluded from the object based audio file among audio objects included in the at least one down-mixed audio track, and to play back an audio track corresponding to the estimated audio track and the plurality of audio tracks for each audio object.

A non-transitory computer-readable recording medium, wherein audio service classification information associated with classifying of audio tracks included in an object based audio file is stored in one of an audio file, a movie box, and a meta box existing within an audio track.

A non-transitory computer-readable recording medium, wherein audio service classification information associated with classifying of audio tracks included in an object based audio file is stored in one of an audio file and a new box within a movie box.