Transmission apparatus, transmission method, reception apparatus, and reception method
To enable satisfactory decoding processing corresponding to a decoding capability on a reception side. Image data of pictures constituting moving image data are sorted into multiple hierarchies, image data of pictures of each of the sorted hierarchies are encoded, and video data including the encoded image data of the pictures of each of the hierarchies is generated. A container of a predetermined format including the video data is transmitted. The multiple hierarchies are divided into a predetermined number of hierarchy groups, the predetermined number being two or more, and identification information for identifying a hierarchy group to which encoded image data of each picture included in the video data belongs is inserted into a packet as a container of the video data.
1. A reception apparatus, comprising:
circuitry configured to
receive a description and encoded image data on a low layer side and a high layer side, wherein
the description includes first identification information of the low layer side of the encoded image data, and second identification information separate from the first identification information, the second identification information indicating a single level specification value of a bit stream including both the low layer side and the high layer side of the encoded image data, and
the encoded image data on the low layer side and the high layer side includes information for identifying a layer to which the encoded image data belongs,
in response to receiving the high layer as a specified layer, decode the encoded image data of the low layer side and decode the encoded image data of the high layer side on the basis of the description, and
set a frame rate of the decoded image data on the basis of selection information which is generated automatically or according to a user operation,
wherein information for identifying a layer to which each picture of the encoded image data belongs is included in a network abstraction layer (NAL) unit of the respective picture of the encoded image data.
2. The reception apparatus according to claim 1 , wherein the first identification information is a level specification value of a bit stream including the low layer side of the encoded image data.
3. The reception apparatus according to claim 1 , the circuitry further configured to extract the first identification information and the second identification information from the description.
4. The reception apparatus according to claim 1 , wherein decoding intervals of pictures on the low layer side of the encoded image data are equal.
5. The reception apparatus according to claim 1 , wherein the frame rate of the decoded image data is matched with a display capability.
6. The reception apparatus according to claim 1 , wherein the description and the encoded image data are received through broadcast transmission.
7. The reception apparatus according to claim 1 , wherein
the encoded image data on the low layer side comprises encoded image data on a first layer and the encoded image data on the high layer side comprises encoded image data on a second layer,
the description includes the first identification information of the first layer and the second identification information of the first layer and the second layer,
the circuitry is configured to decode the encoded image data on the first layer when the specified layer is the first layer, and
the circuitry is configured to decode the encoded image data on the first layer and the encoded image data on the second layer when the specified layer is the second layer.
8. A reception method, comprising:
receiving a description and encoded image data on a low layer side and a high layer side, wherein
the description includes first identification information of the low layer side of the encoded image data, and second identification information separate from the first identification information, the second identification information indicating a single level specification value of a bit stream including both the low layer side and the high layer side of the encoded image data, and
the encoded image data on the low layer side and the high layer side includes information for identifying a layer to which the encoded image data belongs,
in response to receiving the high layer as a specified layer, decoding the encoded image data of the low layer side and decoding the encoded image data of the high layer side on the basis of the description, and
setting a frame rate of the decoded image data on the basis of selection information which is generated automatically or according to a user operation,
wherein information for identifying a layer to which each picture of the encoded image data belongs is included in a network abstraction layer (NAL) unit of the respective picture of the encoded image data.
9. The reception method according to claim 8 , wherein the first identification information is a level specification value of a bit stream including the low layer side of the encoded image data.
10. The reception method according to claim 8 , fluffier comprising extracting the first identification information and the second identification information from the description.
11. The reception method according to claim 8 , wherein decoding intervals of pictures on the low layer side of the encoded image data are equal.
12. The reception method according to claim 8 , wherein the frame rate of the decoded image data is matched with a display capability.
13. The reception method according to claim 8 , wherein the description and the encoded image data are received through broadcast transmission.
14. The reception method according to claim 8 , wherein
the encoded image data on the low layer side comprises encoded image data on a first layer and the encoded image data on the high layer side comprises encoded image data on a second layer,
the description includes the first identification information of the first layer and the second identification information of the first layer and the second layer,
the method comprising decoding the encoded image data on the first layer when the specified layer is the first layer, and
the method comprising decoding the encoded image data on the first layer and the encoded image data on the second layer when the specified layer is the second layer.
15. A non-transitory computer-readable storage medium storing computer-readable instructions thereon, which, when executed by a reception apparatus, cause the reception apparatus to perform a method, comprising:
receiving a description and encoded image data on a low layer side and a high layer side, wherein
the description includes first identification information of the low layer side of the encoded image data, and second identification information separate from the first identification information, the second identification information indicating a single level specification value of a bit stream including both the low layer side and the high layer side of the encoded image data, and
the encoded image data on the low layer side and the high layer side includes information for identifying a layer to which the encoded image data belongs,
in response to receiving the high layer as a specified layer, decoding the encoded image data of the low layer side and decoding the encoded image data of the high layer side on the basis of the description, and
setting a frame rate of the decoded image data on the basis of selection information which is generated automatically or according to a user operation,
wherein information for identifying a layer to which each picture of the encoded image data belongs is included in a network abstraction layer (NAL) unit of the respective picture of the encoded image data.
16. The reception apparatus according to claim 1 , wherein, in response to the specified layer corresponding to the high layer side, the decoded image data includes pictures having information identifying the low layer side and pictures having information identifying the high layer side.
17. The reception method according to claim 8 , wherein in response to the specified layer corresponding to the high layer side, the decoded image data includes pictures having information identifying the low layer side and pictures having information identifying the high layer side.
18. The non-transitory computer-readable storage medium according to claim 15 , wherein in response to the specified layer corresponding to the high layer side, the decoded image data includes pictures having information identifying the low layer side and pictures having information identifying the high layer side.