Transmission device, transmission method, reception device and reception method

A reception device comprising:

• processing circuitry configured to:
• receive a predetermined format container including a base stream and an enhanced stream, wherein:
• the base stream is obtained by performing prediction encoding processing of base frame rate image data to the base frame rate image data in which each frame in the base frame rate image data has a length of two temporally consecutive pictures of predetermined frame rate image data, the base frame rate image data obtained by performing mixing processing in units of two temporally consecutive pictures in the predetermined frame rate image data, the base frame rate image data having a number of frames that is half of a number of frames of the predetermined frame rate image data, and
• the enhanced stream is obtained by performing prediction encoding processing with respect to the base frame rate image data to high frame rate enhanced frame image data in which each frame in the high frame rate enhanced frame image data has a length of two temporally consecutive pictures of the predetermined frame rate image data, the high frame rate enhanced frame image data obtained by extracting image data of one picture in units of the two temporally consecutive pictures, the high frame rate enhanced frame image data having a number of frames that is half of the number of frames of the predetermined frame rate image data, and
• process only the base stream to obtain the base frame rate image data, or process both the base stream and the enhanced stream to obtain the predetermined frame rate image data.

A transmission device comprising:

• processing circuitry configured to:
• perform mixing processing in units of two temporally consecutive pictures in predetermined frame rate image data to obtain base frame rate image data such that each frame in the base frame rate image data has a length of two temporally consecutive pictures of the predetermined frame rate image data, the base frame rate image data having a number of frames that is half of a number of frames of the predetermined frame rate image data
• extract image data of one picture in units of the two temporally consecutive pictures to obtain high frame rate enhanced frame image data such that each frame in the high frame rate enhanced frame image data has a length of two temporally consecutive pictures of the predetermined frame rate image data, the high frame rate enhanced frame image data having a number of frames that is half of the number of frames of the predetermined frame rate image data,
• perform encoding processing to the base frame rate image data to obtain a base stream, and
• perform encoding processing to the high frame rate enhanced frame image data to obtain an enhanced stream;
• and
• a transceiver that transmits a predetermined format container including the base stream and the enhanced stream.

A reception device comprising

• a receiver that receives a predetermined format container including a base stream and an enhanced stream, wherein:
• the base stream is obtained by performing encoding processing to base frame rate image data in which each frame in the base frame rate image data has a length of two temporally consecutive pictures of predetermined frame rate image data, the base frame rate image data obtained by performing mixing processing in units of two temporally consecutive pictures in the predetermined frame rate image data, the base frame rate image data having a number of frames that is half of a number of frames of the predetermined frame rate image data, and
• the enhanced stream is obtained by performing encoding processing to high frame rate enhanced frame image data in which each frame in the high frame rate enhanced frame image data has a length of two temporally consecutive pictures of the predetermined frame rate image data, the high frame rate enhanced frame image data obtained by extracting image data of one picture in units of the two temporally consecutive pictures, the high frame rate enhanced frame image data having a number of frames that is half of the number of frames of the predetermined frame rate image data, and
• processing circuitry configured to process only the base stream to obtain the base frame rate image data, or process both the base stream and the enhanced stream to obtain the predetermined frame rate image data.