Matsushita Electric Industrial Co., Ltd.

Koji Arimura

Jun Ikeda

Kenichi Noridomi

Shinya Kadono Kadono

Kazuhiko Nakamura

Hisashi Inoue

Takashi Katsura

Yuichi Kawaguchi

Yukiko Inoue

A reproduction equipment converts an identification code of the reproduction equipment into a plurality of signal sequences using a correspondence table and embeds the obtained plurality of signal sequences in AV signals as a digital watermark. A reproduction equipment specifying equipment compares correlation values of the AV signals, containing the digital watermark embedded therein with all signal sequences contained in a correspondence table. A comparison of the correlation values with a previously set threshold value determines the embedded signal sequences and the identification code of the reproduction equipment which may be extracted.

Reproduction equipment, reproduction equipment specifying equipment, reproduction equipment specifying system and methods and recording media for said equipment and system

An apparatus for detecting a scene change in a compressed moving-picture detects the scene change even if frame structure images and field structure images exist together. The apparatus includes an image structure judging portion for judging the image structure of an inputted compressed moving-picture, a feature quantity extracting portion for extracting a feature quantity based on top and bottom double data in vertical direction of the image with respect to a field structure image when the judgment result of the image structure judging portion is a frame structure image, a data memory for storing the data extracted by the feature quantity extracting portion, an extracted data comparing portion for comparing the extracted data and calculating the quantity of variation of a picture, and a scene change judging portion for judging a scene change by the use of the quantity of variation calculated by the extracted data comparing portion.

Method and apparatus for detecting scene change of a compressed moving-picture, and program recording medium therefor

Picture quality loss is minimized and buffer underflow and overflow are prevented when extracting and recombining a plurality of consecutive scenes from an MPEG stream. The smallest number of pictures (equivalent at most to 1 second) that must be re-encoded so that the scene can be independently reproduced is detected to identify the re-encoding target picture. Then the picture type (I, P, B) after the pictures are re-encoded is determined. Buffer fullness is calculated, and the code allocation to the re-encoding range is calculated from buffer fullness and target picture count. The code allocation to each target picture is then calculated, and the target pictures are re-encoded and connected.

Video editing apparatus, video editing method, and data storage medium for a video editing program

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Fukuoka-ken, Japan

Koji Arimura