Video data compression apparatus and method of same

Abstract

A video data compression apparatus with which compressed video data of suitable amounts of data can be produced and the time required for processing is short. The apparatus approximates a real difficulty data D j indicating the difficulty of the pattern of each picture by the ME residual, flatness, and intra AC and further calculates the target amount of data T j of the compressed video data from the approximated real difficulty data D j . An encoder performs compression and coding so that the amount of data of the compressed video data becomes substantially the target amount of data T j .

1 - 32 . (canceled) 
     
     
         33 . A video data compression apparatus, comprising:
 data calculating means for calculating data having a correlation with a difficulty of a pattern of an image and an amount of data after compression from non-compressed video data;   target value calculating means for calculating a target value of the amount of data after compression of video data based on said calculated data; and   compressing means for compressing non-compressed video data so that the amount of data after compression becomes the calculated target value.   
     
     
         34 . A video data compression method, comprising the steps of:
 calculating data having a correlation with a difficulty of a pattern of an image and an amount of data after compression from non-compressed video data;   calculating a target value of the amount of data after compression of video data based on said calculated data; and   compressing non-compressed video data so that the amount of data after compression becomes the calculated target value.