Transmission apparatus, transmission method, reception apparatus, and reception method
There is provided a transmission apparatus including: a processing unit that performs processing of mixing, at a mixing rate independent for each frame, image data in peripheral frames with image data in each frame of first moving image data at a first frame rate and obtains second moving image data at the first frame rate. At least image data in a frame corresponding to a second frame rate that is lower than the first frame rate in the image data in each frame that forms the second moving image data is brought into a state in which the image data is mixed with the image data in the peripheral frames.
1. A reception apparatus comprising:
circuitry configured to:
receive a container including a basic stream and an extended stream, the extended stream including an encoded subset of frames of first moving image data of a first frame rate and the basic stream including encoded frames of second moving image data of a second frame rate lower than the first frame rate, each frame of the second moving image data representing a mixing of two or more adjacent frames of the first moving image data, and information about a mixing configuration of the mixing being included in the container, the information about the mixing configuration including mixing refresh information indicating a number of frames until a mixing refresh, in which image data in a temporally previous frame is not used;
decode the basic stream to obtain the second moving image data at the second frame rate;
decode the extended stream to obtain the subset of frames of the first moving image data; and
perform unmixing processing on the second moving image data based on the information about the mixing configuration to obtain the first moving image data at the first frame rate including the subset of frames of the first moving image data.
2. The reception apparatus according to claim 1 , wherein
the basic stream and the extended stream have a NAL unit structure, and
a SEI NAL unit with the information about the mixing configuration is inserted into the basic stream and the extended stream.
3. The reception apparatus according to claim 1 , wherein
the first frame rate is 120 Hz or 240 Hz, and
the second frame rate is 60 Hz.
4. The reception apparatus according to claim 1 , wherein the information about the mixing configuration includes a set of coefficients corresponding to taps of a filter used for the mixing.
5. The reception apparatus according to claim 1 , wherein the information about the mixing configuration includes refresh flag information indicating whether or not a frame associated with the refresh flag information is a target of a mixing refresh.
6. The reception apparatus according to claim 1 , wherein the information about the mixing configuration includes head flag information indicating whether a frame associated with the head flag information corresponds to the second frame rate.
7. The reception apparatus of claim 1 , further comprising:
a display panel,
wherein the circuitry is configured to:
obtain at least one of first moving images from the first moving image data or second moving images from the second moving image data; and
cause at least one of the first moving images or the second moving images to be displayed by the display panel.
8. A reception method comprising:
receiving a container including a basic stream and an extended stream, the extended stream including an encoded subset of frames of first moving image data of a first frame rate and the basic stream including encoded frames of second moving image data of a second frame rate lower than the first frame rate, each frame of the second moving image data representing a mixing of two or more adjacent frames of the first moving image data, and information about a mixing configuration of the mixing being included in the container, the information about the mixing configuration including mixing refresh information indicating a number of frames until a mixing refresh, in which image data in a temporally previous frame is not used;
decoding the basic stream to obtain the second moving image data at the second frame rate;
decoding the extended stream to obtain the subset of frames of the first moving image data; and
performing unmixing processing on the second moving image data based on the information about the mixing configuration to obtain the first moving image data at the first frame rate including the subset of frames of the first moving image data.
9. The reception method according to claim 8 , wherein
the basic stream and the extended stream have a NAL unit structure, and
a SEI NAL unit with the information about the mixing configuration is inserted into the basic stream and the extended stream.
10. The reception method according to claim 8 , wherein
the first frame rate is 120 Hz or 240 Hz, and
the second frame rate is 60 Hz.
11. The reception method according to claim 8 , wherein the information about the mixing configuration includes a set of coefficients corresponding to taps of a filter used for the mixing.
12. The reception method according to claim 8 , wherein the information about the mixing configuration includes refresh flag information indicating whether or not a frame associated with the refresh flag information is a target of a mixing refresh.
13. The reception method according to claim 8 , wherein the information about the mixing configuration includes head flag information indicating whether a frame associated with the head flag information corresponds to the second frame rate.