Method and apparatus for extracting video from high resolution video

A bitstream generation apparatus, comprising:

• a receiving unit configured to receive a content including a video;
• and
• an encoding unit configured to
• analyze the video included in the content, and
• encode the video by setting a size of tiles and the number of tiles in a picture depending on a composition of the video, a size of the video, and a terminal receiving the video such that the video is composed of one or more tiles.

A video extracting terminal device, comprising:

• a communication unit configured to receive at least one of an entire bitstream or an entire bitstream information about the entire bitstream, the entire bitstream having a header information which includes an information indicating that a video is composed of one or more tiles;
• a display unit configured to display the entire bitstream information;
• a user input unit configured to generate a video selection information for indicating an object or an area which is selected by a user out of the entire bitstream information displayed by the display unit;
• a video extraction unit configured to
• analyze video codes and the header information of the entire bitstream,
• generate a new header information by modifying the header information of the entire bitstream according to the video selection information, and
• generate an extracted bitstream including the new header information and a video information of the tiles corresponding to the video selection information;
• and
• a decoder configured to decode the extracted bitstream.