COMPRESSED DATA CONTENTS DISCRIMINATING METHOD AND COMPRESSED DATA CONTENTS DISCRIMINATING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a compressed data contents discriminating method and a compressed data contents discriminating device where contents of compressed data can be discriminated, without the need for completely decoding compressed data. SOLUTION: A DC value, AC value and motion vector value detector 4 detects a DC value, an AC value and a motion vector value, that are feature quantity data of image compressed data from a decoded VLC. A feature quantity comparator 9 receives the feature quantity data, where the feature quantity data are compared with various feature quantity data of various contents in an image feature database 2. Then a picture discrimination device 10 discriminates contents of the feature quantity data in the database with a high adaptation to the feature quantity data of the picture compressed data to be contents of the image compressed data and outputs a discrimination result of the contents of the picture.