Dynamic image encoding device, dynamic image decoding device, dynamic image encoding method, dynamic image decoding method, dynamic image encoding program, and dynamic image decoding program

Abstract

An object of the present invention is to encode and decode image information more efficiently by generating an appropriate predictive signal. The image encoding device of the present invention comprises an input section 201 for inputting an input image constituting an encoding target; a reference image accumulation section 202 for accumulating a reference image; a reference image accompanying information accumulation section 203 for accumulating reference image accompanying information which accompanies the reference image; an encoding section 206 for modifying the reference image and the reference image accompanying information in accordance with the input image, generating a predictive signal for the input image, and encoding the input image; and an output section 209 for outputting, as encoded data, compressed data obtained by encoding by the encoding means together with modification method information indicating a modification method for the reference image.

1 . A moving image encoding device, comprising:
 input means for inputting an input image as an encoding target;   reference image accumulation means for accumulating a reference image;   reference image accompanying information accumulation means for accumulating reference image accompanying information that accompanies the reference image;   encoding means for modifying the reference image and the reference image accompanying information in accordance with the input image, generating a predictive signal for the input image, and encoding the input image; and   output means for outputting, as encoded data, compressed data obtained by encoding by the encoding means together with modification method information indicating a modification method for the reference image.   
     
     
         2 . The moving image encoding device according to  claim 1 , further comprising:
 image reverse modification means for reverse-modifying a locally decoded image that has been locally decoded by the encoding means; and   reference image accompanying information reverse modification means for reverse-modifying information that accompanies the locally decoded image output by the encoding means,   wherein the reference image accumulation means accumulates information that has been reverse-modified by the image reverse modification means as the reference image; and   the reference image accompanying information accumulation means accumulates information that has been reverse-modified by the reference image accompanying information reverse modification means as the reference image accompanying information.   
     
     
         3 . The moving image encoding device according to  claim 1 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         4 . The moving image encoding device according to  claim 2 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         5 . A moving image encoding device, comprising:
 input means for inputting an input image as an encoding target;   reference image accumulation means for accumulating a reference image;   reference image accompanying information accumulation means for accumulating reference image accompanying information that accompanies the reference image;   image modification means for modifying the input image and the reference image;   reference image accompanying information modification means for modifying the reference image accompanying information in accordance with the input image and the reference image;   encoding means for generating a predictive signal for the input image with using the modified reference image and the modified reference image accompanying information, and encoding the input image; and   output means for outputting, as encoded data, compressed data obtained by encoding by the encoding means together with modification method information indicating a modification method for the reference image.   
     
     
         6 . The moving image encoding device according to  claim 5 , further comprising:
 image reverse modification means for reverse-modifying a locally decoded image that has been locally decoded by the encoding means; and   reference image accompanying information reverse modification means for reverse-modifying information that accompanies the locally decoded image output by the encoding means,   wherein the reference image accumulation means accumulates information that has been reverse-modified by the image reverse modification means as the reference image; and   the reference image accompanying information accumulation means accumulates information that has been reverse-modified by the reference image accompanying information reverse modification means as the reference image accompanying information.   
     
     
         7 . The moving image encoding device according to  claim 5 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         8 . The moving image encoding device according to  claim 6 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         9 . A moving image decoding device, comprising:
 division means for dividing encoded data that have been input into compressed data and modification method information;   reference image accumulation means for accumulating a reference image;   reference image accompanying information accumulation means for accumulating reference image accompanying information that accompanies the reference image; and   decoding means for modifying the reference image and the reference image accompanying information with using the modification method information, generating a predictive signal for the decoded image, and decoding a decoded image.   
     
     
         10 . The moving image decoding device according to  claim 9 , further comprising:
 image reverse modification means for reverse-modifying a decoded image that has been decoded by the decoding means; and   reference image accompanying information reverse modification means for reverse-modifying information that accompanies the decoded image that is output by the decoding means,   wherein the reference image accumulation means accumulates the information that has been reverse-modified by the image reverse modification means as the reference image; and   the reference image accompanying information accumulation means accumulates the information that has been reverse-modified by the reference image accompanying information reverse modification means as the reference image accompanying information.   
     
     
         11 . The moving image decoding device according to  claim 9 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         12 . The moving image decoding device according to  claim 10 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         13 . A moving image decoding device, comprising:
 division means for dividing encoded data that have been input into compressed data and modification method information;   reference image accumulation means for accumulating a reference image;   reference image accompanying information accumulation means for accumulating reference image accompanying information that accompanies the reference image;   image modification means for modifying the reference image in accordance with the modification method information;   reference image accompanying information modification means for modifying the reference image accompanying information in accordance with the modification method information; and   decoding means for generating a predictive signal for the decoded image with using the modified reference image and the modified reference image accompanying information, and decoding a decoded image.   
     
     
         14 . The moving image decoding device according to  claim 13 , further comprising:
 image reverse modification means for reverse-modifying a decoded image that has been decoded by the decoding means; and   reference image accompanying information reverse modification means for reverse-modifying information that accompanies the decoded image that is output by the decoding means,   wherein the reference image accumulation means accumulates the information that has been reverse-modified by the image reverse modification means as the reference image; and   the reference image accompanying information accumulation means accumulates the information that has been reverse-modified by the reference image accompanying information reverse modification means as the reference image accompanying information.   
     
     
         15 . The moving image decoding device according to  claim 13 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         16 . The moving image decoding device according to  claim 14 , wherein
 the reference image accompanying information is a motion vector of the reference image.   
     
     
         17 . A moving image encoding method, comprising:
 inputting an input image as an encoding target;   accumulating a reference image;   accumulating reference image accompanying information that accompanies the reference image;   modifying the reference image and the reference image accompanying information in accordance with the input image, generating a predictive signal for the input image, and encoding the input image; and   outputting, as encoded data, compressed data obtained by encoding in the encoding together with modification method information indicating a modification method for the reference image.   
     
     
         18 . A moving image encoding method, comprising:
 inputting input an image as an encoding target;   accumulating a reference image;   accumulating reference image accompanying information that accompanies the reference image;   modifying the input image and the reference image;   modifying the reference image accompanying information in accordance with the input image and the reference image;   generating a predictive signal for the input image with using the modified reference image and the modified reference image accompanying information, and encoding the input image; and   outputting, as encoded data, compressed data obtained by encoding in the encoding together with modification method information indicating a modification method for the reference image.   
     
     
         19 . A moving image decoding method, comprising:
 dividing encoded data that have been input into compressed data and modification method information;   accumulating a reference image;   accumulating reference image accompanying information that accompanies the reference image; and   modifying the reference image and the reference image accompanying information with using the modification method information, generating a predictive signal for the decoded image, and decoding a decoding image.   
     
     
         20 . A moving image decoding method, comprising:
 dividing encoded data that have been input into compressed data and modification method information;   accumulating a reference image;   accumulating reference image accompanying information that accompanies the reference image;   modifying the reference image in accordance with the modification method information;   modifying the reference image accompanying information in accordance with the modification method information; and   generating a predictive signal for the decoded image with using the modified reference image and the modified reference image accompanying information, and decoding a decoded image.   
     
     
         21 . A moving image encoding program that causes a computer to function as:
 input means for inputting an input image as an encoding target;   reference image accumulation means for accumulating a reference image;   reference image accompanying information accumulation means for accumulating reference image accompanying information that accompanies the reference image;   encoding means for modifying the reference image and the reference image accompanying information in accordance with the input image, generating a predictive signal for the input image, and encoding the input image; and   output means for outputting, as encoded data, compressed data obtained by encoding by the encoding means together with modification method information indicating a modification method for the reference image.   
     
     
         22 . A moving image decoding program that causes a computer to function as:
 division means for dividing encoded data that have been input into compressed data and modification method information;   reference image accumulation means for accumulating a reference image;   reference image accompanying information accumulation means for accumulating reference image accompanying information that accompanies the reference image; and   decoding means for modifying the reference image and the reference image accompanying information with using the modification method information, generating a predictive signal for the decoded image, and decoding a decoded image.