Method and device for transmitting and receiving broadcast signal for restoring pulled-down signal

A method for receiving a broadcast signal, the method comprising the steps of:

• receiving a broadcast signal including a video stream, the video stream including reconfigured video data by pull-down process in order to achieve a higher frame rate than a original frame rate, and a picture timing supplemental enhancement information (SEI) message for the reconfigured video data,
• wherein the picture timing SEI message includes picture configuration information indicating whether a picture of the reconfigured video data is displayed as a frame or one or more fields, scan type information indicating a scan type of the picture of the reconfigured video data, and duplicate flag information indicating that the picture of the reconfigured video data is indicated to be a duplicate of a previous picture of the reconfigured video data as a result of the pull-down process;
• extracting the reconfigured video data and the picture timing SEI message from the video stream;
• and
• decoding the extracted reconfigured video data by using the extracted picture timing SEI message.

A device for transmitting a broadcast signal, the device comprising:

• a pull-down module for reconfiguring video data by performing pull-down process in order to achieve a higher frame rate than a original frame rate;
• a video encoder for encoding the reconfigured video data and a picture timing supplemental enhancement information (SEI) message for the reconfigured video data to generate a video stream,
• wherein the picture timing SEI message includes picture configuration information indicating whether a picture of the reconfigured video data is displayed as a frame or one or more fields, scan type information indicating a scan type of the picture of the reconfigured video data, and duplicate flag information indicating that the picture of the reconfigured video data is indicated to be a duplicate of a previous picture of the reconfigured video data as a result of the pull-down process;
• a broadcast signal generator for generating a broadcast signal including the generated video stream;
• and
• a transmission module for transmitting the generated broadcast signal.

A device for receiving a broadcast signal, the device comprising:

• a reception module for receiving a broadcast signal including a video stream, the video stream including reconfigured video data by pull-down process in order to achieve a higher frame rate than a original frame rate, and a picture timing supplemental enhancement information (SEI) message for the reconfigured video data,
• wherein the picture timing SEI message includes picture configuration information indicating whether a picture of the reconfigured video data is displayed as a frame or one or more fields, scan type information indicating a scan type of the picture of the reconfigured video data, and duplicate flag information indicating that the picture of the reconfigured video data is indicated to be a duplicate of a previous picture of the reconfigured video data as a result of the pull-down process;
• an extraction module for extracting the reconfigured video data and the picture timing SEI message from the video stream;
• and
• a decoder for decoding the extracted reconfigured video data by using the extracted picture timing SEI message.