Transmitting device, transmitting method, receiving device, and receiving method
To suitably regulate sound pressure of object content on a receiving side. An audio stream including coded data of a predetermined number of pieces of object content is generated. A container of a predetermined format including the audio stream is transmitted. Information indicating a range within which sound pressure is allowed to increase and decrease for each piece of object content is inserted into a layer of the audio stream and/or a layer of the container. On a receiving side, sound pressure of each piece of object content increases and decreases within the allowable range based on the information.
1. A transmission device, comprising:
circuitry configured to
generate an audio stream that includes coded data of object content, each of the object content being included in one of a plurality of content groups, the plurality of content groups including a dialog language, a sound effect, and spoken subtitles,
transmit a container including the audio stream, and
insert range information and factor type information into a same layer of the audio stream and/or a same layer of the container, the range information indicating a range within which a sound level is allowed to increase and decrease for each of the plurality of content groups, and the factor type information indicating a type of a plurality of factor types to be applied for each of the object content.
2. The transmission device according to claim 1 , wherein the circuitry is configured to insert the range information and the factor type information into the same layer of the audio stream.
3. The transmission device according to claim 2 , wherein the audio stream has a coding scheme that is MPEG-H 3D Audio.
4. The transmission device according to claim 2 , wherein the range information indicates an upper limit value and a lower limit value of the range for each of the plurality of content groups.
5. The transmission device according to claim 1 , wherein
the sound level of an audio object of the object content is permitted to increase in response to a command that corresponds to an increase sound level instruction when the sound level of the audio object is not at an upper limit value; and
the sound level of the audio object is permitted to decrease in response to a command that does not correspond to the increase sound level instruction when the sound level of the audio object is not at a lower limit value.
6. The transmission device according to claim 1 , wherein the factor type information for a content group of the plurality of content groups indicates which of the plurality of factors types to apply to the range information indicating the range of the content group.
7. A reception device, comprising:
circuitry configured to
receive a container including an audio stream, the audio stream including coded data of object content, each of the object content being included in one of a plurality of content groups, the plurality of content groups including a dialog language, a sound effect, and spoken subtitles; and
control a process of adjusting a sound level of each of the object content based on range information and factor type information that are inserted into a same layer of the audio stream and/or a same layer of the container, the range information indicating a range within which the sound level is allowed to increase or decrease for each of the plurality of content groups, and the factor type information indicating a type of a plurality of factor types to be applied for each of the object content.
8. The reception device according to claim 7 , wherein the range information and the factor type information are inserted into the same layer of the audio stream.
9. The reception device according to claim 8 , wherein the audio stream has a coding scheme that is MPEG-H 3D Audio.
10. The reception device according to claim 8 , wherein the range information indicates an upper limit value and a lower limit value of the range within which the sound level is allowed to increase and decrease for each of the plurality of content groups.
11. The reception device according to claim 7 , wherein the circuitry is further configured to:
increase the sound level of an audio object of the object content when the sound level of the audio object is not at an upper limit value and when a command received is an increase sound level instruction; and
decrease the sound level of the audio object when the sound level of the audio object is not at a lower limit value and when the command received is not the increase sound level instruction.
12. The reception device according to claim 11 , wherein the circuitry is further configured to:
decrease the sound level of another audio object of the object content when the command received is the increase sound level instruction; and
increase the sound level of the another audio object when the command received is not the increase sound level instruction.
13. The reception device according to claim 11 , wherein the sound level of the audio object is increased by a predetermined amount that is based on the type of the plurality of factor types to be applied.
14. The reception device according to claim 7 , wherein the inclusion of the range information in the same layer of the audio stream and/or the same layer of the container is based on the factor type information.
15. A reception method comprising:
receiving, by a receiver, a container including an audio stream, the audio stream including coded data of object content, each of the object content being included in one of a plurality of content groups, the plurality of content groups including a dialog language, a sound effect, and spoken subtitles; and
controlling a process of adjusting a sound level of each of the object content based on range information and factor type information that are inserted into a same layer of the audio stream and/or a same layer of the container, the range information indicating a range within which the sound level is allowed to increase or decrease for each of the plurality of content groups, and the factor type information indicating a type of a plurality of factor types to be applied for each of the object content.
16. The method according to claim 15 , wherein the range information and the factor type information are inserted into the same layer of the audio stream.
17. The method according to claim 16 , wherein the audio stream has a coding scheme that is MPEG-H 3D Audio.
18. The method according to claim 16 , wherein the range information indicates an upper limit value and a lower limit value of the range within which the sound level is allowed to increase and decrease for each of the plurality of content groups.
19. The method according to claim 15 , further comprising:
increasing the sound level of an audio object of the object content when the sound level of the audio object is not at an upper limit value and when a command received is an increase sound level instruction; and
decreasing the sound level of the audio object when the sound level of the audio object is not at a lower limit value and when the command received is not the increase sound level instruction.
20. The method according to claim 19 , further comprising:
decreasing the sound level of another audio object of the object content when the command received is the increase sound level instruction; and
increasing the sound level of the another audio object when the command received is not the increase sound level instruction.
21. The method according to claim 19 , wherein the sound level of the audio object is increased by a predetermined amount that is based on the type of the plurality of factor types to be applied.