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

Abstract

The present technology reduces a process load in a reception side when a plurality of types of audi data is transmitted. A metafile having meta information used to acquire, in a reception device, a predetermined number of audio streams including a plurality of groups of encoded data is transmitted. To the metafile, attribute information indicating each attribute of the encoded data of the plurality of groups is inserted. For example, to the metafile, stream correspondence relation information indicating in which audio stream the encoded data of the plurality of groups is included respectively is further inserted.

The invention claimed is: 
     
       1. A transmission device comprising: processing circuitry configured to:
 generate 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; 
 insert, 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; 
 insert, 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; and 
 insert, 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 
 transmission circuitry configured to transmit the metafile to the reception device. 
 
     
     
       2. The transmission device according to  claim 1 , wherein the stream correspondence relation information includes information indicating a correspondence relation between group identifiers that respectively identify each of the plurality of groups of encoded data and identifiers that respectively identify each of the predetermined number of audio streams. 
     
     
       3. The transmission device according to  claim 1 , wherein the metafile is a media presentation description (MPD) file. 
     
     
       4. The transmission device according to  claim 3 , wherein the processing circuitry is further configured to insert, to the metafile, the attribute information by using a supplementary descriptor. 
     
     
       5. The transmission device according to  claim 1 , wherein the transmission circuitry is configured to transmit the metafile via an RF transmission path or a communication network transmission path. 
     
     
       6. The transmission device according to  claim 1 , wherein the transmission circuitry is configured to transmit a container in a predetermined format that carries the predetermined number of audio streams including the plurality of groups of encoded data. 
     
     
       7. The transmission device according to  claim 6 , wherein the container is an MP4 container. 
     
     
       8. The transmission device according to  claim 1 , wherein the plurality of groups of encoded data includes one of or both of channel encoded data and object encoded data. 
     
     
       9. 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. 
 
     
     
       10. 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. 
 
     
     
       11. The reception device according to  claim 10 , wherein the processing circuitry is configured to selectively perform a decoding process on an audio stream including a group of encoded data having an attribute compatible with a speaker configuration and user selection information, on the basis of the attribute information and the stream correspondence relation information. 
     
     
       12. The reception device according to  claim 10 , wherein the plurality of groups of encoded data includes one of or both of channel encoded data and object encoded data. 
     
     
       13. 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. 
 
     
     
       14. 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. 
 
     
     
       15. 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. 
 
     
     
       16. 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.  
   
     
     
       17. The reception device according to  claim 16 , wherein the encoded data of the plurality of groups includes one of or both of channel encoded data and object encoded data, and
 the processing unit further configured to obtain one of or both of channel data and object data.    
     
     
       18. The reception device according to  claim 17 , wherein the processing unit further configured to perform downmixing or upmixing on the channel data for the speaker configuration of speaker system.  
     
     
       19. The reception device according to  claim 17 , wherein the processing unit further configured to mix one or both of the object data and the channel data.  
     
     
       20. The reception device according to  claim 18 , wherein the processing unit is further configured to mix the object data and the channel data.  
     
     
       21. The reception device according to  claim 16 , wherein the processing unit is further configured to perform dynamic range control.  
     
     
       22. The reception device according to  claim 17 , wherein the processing unit is further configured to perform dynamic range control.  
     
     
       23. The reception device according to  claim 18 , wherein the processing unit is further configured to perform dynamic range control.  
     
     
       24. The reception device according to  claim 19 , wherein the processing unit is further configured to perform dynamic range control.