Encoding device, encoding method, transmission device, decoding device, decoding method, and reception device
To enable image data of the interlacing scheme to undergo encoding of an open GOP. An image encoding unit encodes image data of each picture constituting image data in an interlacing scheme in an NAL unit structure and generates a video stream having the encoded image data of each picture. The image encoding unit sets an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture.
1. An encoding device comprising:
an image encoding unit configured to encode image data of each picture constituting image data in an interlacing scheme in an NAL unit structure and generate a video stream having the encoded image data of each picture,
wherein the image encoding unit sets an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture.
2. The encoding device according to claim 1 , wherein the image encoding unit classifies the image data of each picture constituting the image data in the interlacing scheme into a plurality of layers, encodes image data of a picture of each classified layer, and generates a video stream having the encoded image data of the picture of each layer.
3. The encoding device according to claim 1 , wherein the image encoding unit encodes the image data in the interlacing scheme in an HEVC scheme.
4. An encoding method comprising:
an image encoding step by an image encoding unit of encoding image data of each picture constituting image data in an interlacing scheme in an NAL unit structure and generating a video stream having the encoded image data of each picture,
wherein, in the image encoding step, an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point is set to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture.
5. A transmission device comprising:
an image encoding unit configured to encode image data of each picture constituting image data in an interlacing scheme in an NAL unit structure and generate a video stream having the encoded image data of each picture; and
a transmission unit configured to transmit a container in a predetermined format which includes the generated video stream,
wherein the image encoding unit sets an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture.
6. A decoding device comprising:
an image decoding unit configured to decode a video stream having encoded image data of each picture obtained by encoding image data of each picture constituting image data in an interlacing scheme in an NAL unit structure to obtain the image data in the interlacing scheme,
wherein, in the video stream, an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point is set to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture.
7. The decoding device according to claim 6 ,
wherein the video stream has image data of a picture of each layer obtained by encoding image data of a picture of each layer, which is obtained by classifying the image data of each picture constituting the image data in the interlacing scheme into a plurality of layers, and
wherein the image decoding unit decodes encoded image data of a picture of a layer designated in layer designation information and obtains image data of a picture of a layer equal to or lower than a predetermined layer.
8. The decoding device according to claim 6 , further comprising:
a scheme conversion unit configured to convert the image data in the interlacing scheme obtained by the image decoding unit into image data in a progressive scheme; and
a post-processing unit configured to cause a frame rate of image data of each picture obtained by the scheme conversion unit to match a display capability.
9. A decoding method comprising:
an image decoding step by an image decoding unit of decoding a video stream having encoded image data of each picture obtained by encoding image data of each picture constituting image data in an interlacing scheme in an NAL unit structure to obtain the image data in the interlacing scheme,
wherein, in the video stream, an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point is set to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture.
10. A reception device comprising:
a reception unit configured to receive a container in a predetermined format which includes a video stream having encoded image data of each picture obtained by encoding image data of each picture constituting image data in an interlacing scheme in an NAL unit structure; and
an image decoding unit configured to obtain the image data in the interlacing scheme by decoding the video stream included in the received container,
wherein, in the video stream, an NAL unit type of a slice of encoded image data of a picture forming a field pair with an intra picture constituting a random access point is set to a unique type which indicates a picture that is dependent on the intra picture and forms the field pair with the intra picture.