Image processing apparatus, image processing method, image processing program, and information record medium storing program

A data record-reproduce device includes a reception unit for obtaining contents data, a telop extraction unit for extracting telop from video data, a changed portion detection unit for detecting a changed portion of telop; a changed point detection unit for detecting a changed point of a changed portion, a retrieval key generation unit for generating a retrieval key using an image of a changed portion, a data setting unit for setting retrieval data indicating the correspondence between a retrieval key and a changed point, an operation unit used in selecting a retrieval key, a retrieval control unit for retrieving a changed point corresponding to a retrieval key based on retrieval data, and a reproduction control unit for reproducing contents data using a changed point as a starting point.