Transmission device, transmission method, reception device, and reception method for audio streams
It is attempted to reduce the processing load of a receiver at the time of integrating plural audio streams. A predetermined number of audio streams are generated, and a container of a predetermined format including these predetermined number of audio streams is transmitted. The audio streams are constituted by an audio frame including a first packet that includes encoded data as payload information and a second packet that includes configuration information representing a configuration of the payload information of this first packet as payload information. Common index information is inserted in payloads of related first packet and second packet.
1. A transmission device for transmitting an audio stream to a speaker system having speakers present at arbitrary positions, the transmission device comprising:
an encoder configured to generate the audio stream by
encoding data of the audio stream as payload information of a first packet having a decoding order,
generating a second packet that includes respective configuration information for the encoded data of the first packet as payload information,
and
inserting common index information in both the first packet and the second packet, wherein the common index information is an index indicating the decoding order of the first packet and has a same value in both the first packet and the second packet; and
a transmitter configured to transmit the audio stream including the first packet and the second packet to the speaker system.
2. The transmission device according to claim 1 , wherein the encoded data included in the first packet as payload information is one of encoded single channel data, channel pair data, low frequency data, and metadata for performing rendering of the audio signals,
and
wherein the configuration information includes at least one of configuration information for the single channel data, configuration information for the channel pair data, configuration information for the low frequency data, and configuration information for the metadata.
3. A transmission method for transmitting an audio stream to a speaker system having speakers present at arbitrary positions, the method comprising:
generating, by an encoder, the audio stream by
encoding data of the audio stream as payload information of a first packet having a decoding order,
generating a second packet that includes respective configuration information for the encoded data of the first packet as payload information,
and
inserting common index information in both the first packet and the second packet, wherein the common index information is an index indicating the decoding order of the first packet and has a same value in both the first packet and the second packet; and
transmitting, by a transmitter, the audio stream including the first packet and the second packet to the speaker system.
4. A receiving device supplying data of an audio stream to a speaker system having speakers present at arbitrary positions, the receiving device comprising:
processing circuitry configured to receive the audio stream,
wherein the audio stream includes encoded data as payload information of a first packet having a decoding order, and includes a second packet that includes respective configuration information for the encoded data of the first packet as payload information, and common index information that is inserted in both the first packet and the second packet, wherein the common index information is an index indicating the decoding order of the first packet and has a same value in both the first packet and the second packet;
the processing circuitry configured to process the audio stream by using the common index information to relate the first packet to the respective configuration information of the second packet and to integrate the first packet into the audio stream according to the decoding order, and supply the audio stream to the speaker system.
5. The receiving device according to claim 4 , wherein the processing circuitry performs decoding processing on the audio stream.
6. The receiving device according to claim 4 , wherein the processing circuitry transmits the audio stream to an external device.
7. A receiving method supplying data of an audio stream to a speaker system having speakers present at arbitrary positions, the method comprising:
receiving, by processing circuitry, the audio stream,
wherein the audio stream includes encoded data as payload information of a first packet having a decoding order, and includes a second packet that includes respective configuration information for the encoded data of the first packet as payload information, and common index information that is inserted in both the first packet and the second packet, wherein the common index information is an index indicating the decoding order of the first packet and has a same value in both the first packet and the second packet;
processing, by the processing circuitry, the audio stream by using the common index information to relate the first packet to the respective configuration information of the second packet and to integrate the first packet into the audio stream according to the decoding order, and supplying the audio stream to the speaker system.