| 摘要 |
Provided are a method and apparatus for selecting an appropriate reference frame at high speed from a plurality of reference frames when transcoding an input video stream into a different format having a different group of pictures (GOP) structure from that of the input video stream. A transcoder, which transcodes an input video stream into an output video stream, includes a reconstruction unit which reconstructs transform coefficients and a video frame from the input video stream; a selection unit which selects one of a first frame, which is referred to by the video frame, and a second frame, which is located at a different position from the first frame, based on sizes of the transform coefficients; and an encoding unit which encodes the reconstructed video frame by referring to the selected frame. |
