Apparatus and method for converting a compressed video stream with preview of converted stream

Abstract

An apparatus by which a user can easily set a parameter for conversion when a compression encoding system of video stream is converted is provided. A particular period in a first video stream is repeatedly reproduced to convert the reproduced portion into a second video stream in real time. At that time, the user checks the image quality after conversion on a preview screen and sets a desired conversion parameter. A local decode image is output to the preview screen. Thus, the circuit configuration is simplified.

1 . An apparatus for converting an encoding system of video stream which 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, 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; and   a preview output unit outputting an image corresponding to a decoded image of the converted second video stream to a display device;   said stream output unit outputting the second video stream for a period designated by the conversion period designator.