Method and apparatus for recording and reproducing video data, and information storage medium in which video data is recorded by the same

Abstract

A method of recording and reproducing video data is provided. The method of recording video data in an information storage medium includes the steps of (a) decoding originally encoded video data, (b) re-encoding the decoded video data in a different way to the originally encoded video data, (c) generating video transform information which is to be referred to for decoding the video data into its original state, and (d) recording the generated video transform information and the re-encoded video data in the information storage medium. Accordingly, the video data can be properly reproduced even if it is re-encoded in a different way to the originally encoded video data.

1 . An apparatus to receive an input bitstream and record the bitstream in an information storage medium, the apparatus comprising:
 a receiver to receive video data from the input bitstream; and   a recorder to decode the received video data, wherein the recorder:
 re-encodes the decoded video data so that the re-encoded video data has a different resolution from the originally encoded video data, and 
 records the re-encoded video data and video transform information comprising an original resolution and an aspect ratio of the originally encoded video data. 
   
   
   
       2 . The apparatus of  claim 1 , wherein the video transform information is included in a program map table (PMT) packet.