Transmission device, transmission method, reception device, and reception method

A transmission method comprising:

• generating, by processing circuitry of a transmission device, a metafile having meta information used to acquire, by a reception device, one or more groups of encoded data of a plurality of groups of encoded data carried by a predetermined number of audio streams from a source outside the reception device, each audio stream of the predetermined number of audio streams including a respective subset of the plurality of groups of encoded data;
• inserting, by the processing circuitry of the transmission device to the metafile for a particular group of encoded data of the plurality of groups of encoded data, attribute information indicating an attribute of the particular group of encoded data;
• inserting, by the processing circuitry of the transmission device to the metafile, preset identification information that includes a preset identifier in association with a particular group identifier, the preset identifier identifying a preset collection of groups of encoded data with which the particular group of encoded data is associated, and the particular group identifier identifying the particular group of encoded data;
• inserting, to the metafile, stream correspondence relation information indicating in which audio stream, of the audio streams, each group of the plurality of groups of encoded data are included;
• and
• transmitting, by transmission circuitry of the transmission device, the metafile to the reception device.

A reception device comprising:

• reception circuitry configured to receive a metafile having meta information used to acquire one or more groups of encoded data of a plurality of groups of encoded data carried by a predetermined number of audio streams from a source outside the reception device, each audio stream of the predetermined number of audio streams including a respective subset of the plurality of groups of encoded data,
• the metafile including attribute information for a particular group of encoded data of the plurality of groups of encoded data that indicates an attribute of the particular group of encoded data,
• the metafile including preset identification information that includes a preset identifier in association with a particular group identifier, the preset identifier identifying a preset collection of groups of encoded data with which the particular group of encoded data is associated, and the particular group identifier identifying the particular group of encoded data, and
• the metafile including stream correspondence relation information indicating in which audio stream, of the audio streams, each group of the plurality of groups of encoded data are included;
• and
• processing circuitry configured to control acquiring the one or more groups of encoded data on the basis of the attribute information, the preset identification information, or the stream correspondence relation information.

A reception method comprising:

• receiving, by reception circuitry of a reception device, a metafile having meta information used to acquire one or more groups of encoded data of a plurality of groups of encoded data carried by a predetermined number of audio streams from a source outside the reception device, each audio stream of the predetermined number of audio streams including a respective subset of the plurality of groups of encoded data,
• the metafile including attribute information for a particular group of encoded data of the plurality of groups of encoded data indicating an attribute of the particular group of encoded data,
• the metafile including preset identification information that includes a preset identifier in association with a particular group identifier, the preset identifier identifying a preset collection of groups of encoded data with which the particular group of encoded data is associated, and the particular group identifier identifying the particular group of encoded data, and
• the metafile including stream correspondence relation information indicating in which audio stream, of the audio streams, each group of the plurality of groups of encoded data are included;
• and
• controlling, by processing circuitry of the reception device, acquiring the one or more groups of encoded data on the basis of the attribute information, the preset identification information, or the stream correspondence relation information.

A reception device comprising:

• reception circuitry configured to receive a metafile having meta information used to acquire one or more groups of encoded data of a plurality of groups of encoded data carried by a predetermined number of audio streams from a source outside the reception device, each audio stream of the predetermined number of audio streams including a respective subset of the plurality of groups of encoded data,
• the metafile including attribute information for a particular group of encoded data of the plurality of groups of encoded data indicating an attribute of the particular group of encoded data,
• the metafile including preset identification information that includes a preset identifier in association with a particular group identifier, the preset identifier identifying a preset collection of groups of encoded data with which the particular group of encoded data is associated, and the particular group identifier identifying the particular group of encoded data, and
• the metafile including stream correspondence relation information indicating in which audio stream, of the audio streams, each group of the plurality of groups of encoded data are included;
• processing circuitry configured to
• selectively acquire the one or more groups of encoded data on the basis of the attribute information, the preset identification information, or the stream correspondence relation information, and
• reconfigure an audio stream including the one or more groups of encoded data;
• and
• transmission circuitry configured to transmit the reconfigured audio stream to an external device.

A reception method comprising:

• receiving, by reception circuitry of a reception device, a metafile having meta information used to acquire one or more groups of encoded data of a plurality of groups of encoded data carried by a predetermined number of audio streams from a source outside the reception device, each audio stream of the predetermined number of audio streams including a respective subset of the plurality of groups of encoded data,
• the metafile including attribute information for a particular group of encoded data of the plurality of groups of encoded data indicating an attribute of the particular group of encoded data,
• the metafile including preset identification information that includes a preset identifier in association with a particular group identifier, the preset identifier identifying a preset collection of groups of encoded data with which the particular group of encoded data is associated, and the particular group identifier identifying the particular group of encoded data, and
• the metafile including stream correspondence relation information indicating in which audio stream, of the audio streams, each group of the plurality of groups of encoded data are included;
• selectively acquiring, by processing circuitry of the reception device, the one or more groups of encoded data on the basis of the attribute information, the preset identification information, or the stream correspondence relation information;
• reconfiguring, by the processing circuitry of the reception device, an audio stream including the one or more groups of encoded data;
• and
• transmitting, by transmission circuitry of the reception device, the reconfigured audio stream to an external device.

A reception device comprising:

• a receiving unit configured to receive a metafile having meta information used to acquire, from communication network or broadcast, a predetermined number of audio streams including a plurality of groups of encoded data,
• the metafile including attribute information that indicates each attribute of the encoded data of the plurality of groups,
• the metafile including preset identification information that includes a preset identifier in association with a particular group identifier, the preset identifier identifying a preset collection of groups of encoded data with which a group of encoded data is associated, and the group identifier identifying the particular group of encoded data, and
• the metafile including stream correspondence relation information indicating in which audio stream, of the audio streams, each group of the plurality of groups of encoded data are included;
• and
• a processing unit configured to:
• selectively acquire at least one group of encoded data on the basis of the attribute information, preset identification information, or stream correspondence relation information,
• acquire selection information from user, and
• decode encoded data of a group having an attribute compatible with speaker configuration of speaker system and the selection information on the basis of the attribute information.