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

An apparatus for detecting a scene change in a compressed moving-picture comprising:

• a feature quantity extracting unit operable to extract a feature quantity based on block data for one block independently of an image structure of an inputted compressed moving-picture;
• a storage area for storing block data extracted by the feature quantity extracting unit;
• an extracted data comparing unit operable to compare a feature quantity by the use of double block data in vertical direction of an image with respect to a field structure image when an image from which a feature quantity has been extracted is a frame structure image;
• and
• a scene change judging unit operable to judge a scene change by the use of the quantity of variation calculated by the extracted data comparing unit.

An apparatus for detecting a scene change in a compressed moving-picture comprising:

• a scene change judging unit operable to judge a plurality of scene changes;
• a measuring unit operable to select a plurality of pairs of the scene changes from the plurality of scene changes and to measure an interval length for each of the plurality of pairs;
• and
• a detecting unit operable to detect, from the plurality of pairs a pair of scene changes having an interval length equal to a predefined interval length.

A method of detecting a scene change in a compressed moving-picture comprising the steps of:

• judging step of judging an image structure of an inputted compressed moving-picture;
• extracting step of extracting a feature quantity based on top and bottom double data in vertical direction of an image with respect to a field structure image when a judgment result of the image structure judging step is a frame structure image;
• storing data extracted by the feature quantity extracting step in a storage area;
• comparing the extracted block data and calculating a quantity of variation of a picture;
• and
• judging a scene change by the use of the quantity of variation calculated by the extracted data comparing step.

A method of detecting a scene change in a compressed moving-picture comprising the steps of:

• extracting a feature quantity based on block data for one block independently of an image structure of an inputted compressed moving-picture;
• storing block data extracted by the feature quantity extracting step in a storage area;
• comparing a feature quantity by the use of double block data in vertical direction of an image with respect to a field structure image when an image from which a feature quantity has been extracted is a frame structure image;
• and
• judging a scene change by the use of the quantity of variation calculated by the extracted data comparing step.

A method of detecting a scene change in a compressed moving-picture comprising the steps of:

• judging a plurality of scene changes;
• selecting a plurality of pairs of scene changes from the plurality of scene changes and measuring an interval length for each of the plurality of pairs of scene changes;
• and
• detecting, from the plurality of pairs of scene changes, a pair of scene changes having an interval length equal to a predefined interval length.

A recording medium that computer-readably records a program for detecting a scene change in a compressed moving-picture, the program comprising:

• an image structure judging step of judging an image structure of an inputted compressed moving-picture;
• a feature quantity extracting step of extracting a feature quantity based on top and bottom double data in vertical direction of an image with respect to a field structure image when a judgment result of the image structure judging step is a frame structure image;
• a storage area for storing data extracted by the feature quantity extracting step;
• an extracted data comparing step of comparing the extracted data and calculating a quantity of variation of a picture;
• and
• a scene change judging step of judging a scene change by the use of the quantity of variation calculated by the extracted data comparing step.

A recording medium that computer-readably records a program for detecting a scene change in a compressed moving-picture, the program comprising:

• a feature quantity extracting step of extracting a feature quantity based on block data for one block independently of an image structure of an inputted compressed moving-picture;
• a storage area for storing block data extracted by the feature quantity extracting step;
• an extracted data comparing step of comparing a feature quantity by the use of double block data in vertical direction of an image with respect to a field structure image when an image from which a feature quantity has been extracted is a frame structure image;
• and
• a scene change judging step of judging a scene change by the use of the quantity of variation calculated by the extracted data comparing step.

A recording medium that computer-readably records a program for detecting a scene change in a compressed moving-picture, the program comprising:

• a scene change judging step of judging a scene change;
• a measuring step of selecting a plurality of pairs of the scene changes from the plurality of scene changes and measuring an interval lenght for each of the plurality of pairs;
• and
• a detecting step of detecting, from the plurality of pairs of scene changes, a pair of scene changes having an interval length equal to a predefined interval length.