Transmission device, transmission method, reception device, and reception method
AssigneeSony Corporation
InventorIkuo TSUKAGOSHI
Life of this patent
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Abstract
An image data of pictures constituting moving image data is encoded to generate an encoded video stream. In this case, the image data of the pictures constituting the moving image data is classified into a plurality of levels and encoded to generate a video stream having the image data of the pictures at the respective levels. Hierarchical composition is equalized between a low-level side and a high-level side, and corresponding pictures on the low-level side and the high-level side are combined into one set and are sequentially encoded. This allows a reception side to decode the encoded image data of the pictures on the low-level side and the high-level side with a smaller buffer size and a reduced decoding delay.
Claims16
A transmission device comprising:
- an encoder configured to:
- perform hierarchical encoding on image data of pictures constituting moving image data to generate a video stream having encoded image data on a low-level side and a high-level side, and
- insert a level specified value of the encoded image data on the low-level side and a level specified value of the video stream into a layer of the video stream;
- a multiplexer configured to:
- multiplex the video stream generated by the encoder to obtain a container in a predetermined format,
- insert hierarchical information including the level specified value of the encoded image data on the low-level side and the level specified value of the video stream into a layer of the container;
- and
- a transmitter configured to transmit the container in the predetermined format obtained by the multiplexer.
A transmission method comprising:
- performing hierarchical encoding on image data of pictures constituting moving image data to generate a video stream having encoded image data on a low-level side and a high-level side;
- inserting a level specified value of the encoded image data on the low-level side and a level specified value of the video stream into a layer of the video stream;
- and
- multiplexing the video stream to obtain a container in a predetermined format;
- inserting hierarchical information including the level specified value of the encoded image data on the low-level side and the level specified value of the video stream into a layer of the container;
- and
- transmitting the container in the predetermined format obtained at the multiplexing.
A reception device comprising:
- a receiver configured to receive a container in a predetermined format containing:
- a video stream having encoded image data on a low-level side and a high-level side generated by performing hierarchical encoding on image data of pictures constituting moving image data, and
- hierarchical information including a level specified value of the encoded image data on the low-level side and a level specified value of the video stream inserted into a layer of the container, wherein
- the level specified value of the encoded image data on the low-layer side and the level specified value of the video stream are inserted into a layer of the video stream;
- and
- a processor configured to decode the encoded image data on the low-level side or both the encoded image data on the low-level side and the high-level side contained in the received container depending on a decoding capability to obtain the image data of the pictures constituting moving image data.
A reception method comprising:
- receiving a container in a predetermined format containing
- a video stream having encoded image data on a low-level side and a high-level side generated by performing hierarchical encoding on image data of pictures constituting moving image data, and
- hierarchical information including a level specified value of the encoded image data on the low-level side and a level specified value of the video stream inserted into a layer of the container, wherein
- the level specified value of the encoded image data on the low-level side and the level specified value of the video stream are inserted into a layer of the video stream;
- and
- decoding the encoded image data on the low-level side or both the encoded image data on the low-level side and the high-level side contained in the received container depending on a decoding capability to obtain the image data of the pictures constituting moving image data.
Dependencies are inferred from the claim text.