| 摘要 |
<p>PROBLEM TO BE SOLVED: To put this method to practical use sufficiently by avoiding an image from being deteriorated and minimizing a delay in the case of replacing a part area of an image of an MPEG2 video stream with another video image. SOLUTION: In the case of coding a video image into a video stream VSm by the video coder, the image area is divided into two areas, that is, a replacement enable area (A1) and a replacement disable area (A2), and data of the area A1 are coded by using only data of the area A2 for reference data for motion detection. A replacement section 62 replaces a slice of a stream Sm in the area A1 generated by the coder with a replaced video image slice stored in a library 63. Moreover, the video coder applies intra-coding to the data of the area A1 to decode data of the area A1 only, overwrite the data on the image and encode the data. Thus, a stream Sm is produced without decoding the stream Sm itself but while replacing the part of the stream with other video image (e.g. commercial CM) or a stream Sm on which a logo or the like is overwritten through decoding/encoding of the replaced area only.</p> |
