Patent ID: 7346271

Claim:
An apparatus for converting an encoding system of video stream, wherein the apparatus converts a first video stream recorded on a storage medium by a first compression encoding system into a second video stream using a second compression encoding system, said apparatus comprising: a reproducer reproducing the first video stream recorded on the storage medium; a stream converter converting the reproduced first video stream into the second video stream; a conversion period designator designating a conversion period in the first video stream; a stream output unit outputting the converted second video stream; a preview output unit outputting an image corresponding to a decoded image of the converted second video stream to a display device; and a user interface inputting a parameter for converting the first video stream into the second video stream, wherein said stream output unit outputs the second video stream for a period designated by the conversion period designator, wherein said reproducer repeatedly reproduces the first video stream for a period designated by said conversion period designator, wherein said preview output unit outputs only an image of a particular frame in an image corresponding to the decoded image of the converted second video stream, and holds the output of the particular frame without outputting the remainder of the converted second video stream, and wherein said preview output unit, when said user interface changes the parameter during a period at which the first video stream is converted into the second video stream, outputs the particular frame in the converted second video stream after the change of the parameter, in real time.