JP2011041329A5

JP2011041329A5 - Image decoding apparatus, image decoding method, image decoding program, image encoding apparatus, image encoding method, and image encoding program

Info

Publication number: JP2011041329A5
Application number: JP2010260386A
Authority: JP
Filing date: 2010-11-22
Publication date: 2011-12-15
Anticipated expiration: 2025-10-13

Description

本発明は、画像復号装置、画像復号方法、画像復号プログラム、画像符号化装置、画像符号化方法、及び画像符号化プログラムに関する。 The present invention relates to an image decoding device, an image decoding method, an image decoding program, an image encoding device, an image encoding method, and an image encoding program .

本発明は、上記課題を解決するためになされたものであり、画像解像拡張処理にかかる演算量を軽減しつつ、画像間の動き検出の精度を向上させることができる画像復号装置、画像復号方法、画像復号プログラム、画像符号化装置、画像符号化方法、及び画像符号化プログラムを提供することを目的とする。 The present invention has been made to solve the above-described problem, and is an image decoding device and an image decoding device that can improve the accuracy of motion detection between images while reducing the amount of calculation required for image resolution expansion processing. It is an object to provide a method, an image decoding program, an image encoding device, an image encoding method, and an image encoding program .

Claims

Encoded data decoding means for receiving encoded data and entropy decoding to obtain a motion vector generation condition as a condition necessary for generating a motion vector and encoded information indicating a prediction error image signal;
An image memory for storing the decoded image signal;
Motion vector generation means for generating a motion vector from the decoded image signal stored in the image memory based on the motion vector generation condition obtained by the encoded data decoding means;
Predicted image signal generating means for generating a predicted image signal using the motion vector generated by the motion vector generating means and the decoded image signal;
Decoding means for decoding the encoded information obtained by the encoded data decoding means to obtain a prediction error image signal;
The prediction image signal generated by the prediction image signal generation unit and the prediction error image signal obtained by the decoding unit are added to restore the decoded image signal, and the decoded image signal is stored in the image memory Means,
An image decoding apparatus comprising:

An input means for inputting an input image signal;
An image memory for storing the decoded image signal;
Motion vector generation condition determining means for determining a motion vector generation condition as a condition necessary for generating a motion vector based on the input image signal input by the input means;
Motion vector generation means for generating a motion vector from the decoded image signal stored in the image memory based on the motion vector generation condition determined by the motion vector generation condition determination means;
A predicted image signal generating unit that generates a predicted image signal using the motion vector generated by the motion vector generating unit and the decoded image signal;
Prediction error image signal generation means for generating a prediction error image signal from the input image signal input by the input means and the prediction image signal generated by the prediction image signal generation means;
Encoding information acquisition means for encoding the prediction error image signal generated by the prediction error image signal generation means to obtain encoding information;
Local decoding means for decoding the encoded information obtained by the encoded information acquisition means to obtain a decoded prediction error image signal;
Storage means for restoring the decoded image signal from the predicted image signal generated by the predicted image signal generation means and the decoded prediction error image signal obtained by the local decoding means, and storing the decoded image signal in the image memory When,
Encoded data generating means for entropy encoding the motion vector generating condition determined by the motion vector generating condition determining means and the encoded information obtained by the encoded information acquiring means to generate encoded data;
An image encoding device comprising:

  Video data decoding means for receiving and decoding video encoded data to obtain a plurality of reproduced images;
  An image memory for storing high-resolution images with expanded resolution;
  Generating a motion vector representing a spatio-temporal correspondence between the plurality of reproduced images, and using the generated motion vector and the plurality of reproduced images obtained by the video data decoding means, the spatial resolution is higher than that of the plurality of reproduced images. A resolution for generating a first high-resolution image having a high resolution and generating a second high-resolution image using the generated first high-resolution image and the high-resolution image stored in the image memory Expansion means;
  Image storage means for storing the first or second high-resolution image generated by the resolution expansion means in the image memory;
  An image decoding apparatus comprising:

  Video data decoding means for receiving and decoding video encoded data to obtain a plurality of reproduced images;
  Auxiliary data decoding means for receiving auxiliary data and decoding to obtain auxiliary motion information;
  An image memory for storing high-resolution images with expanded resolution;
  Generating a motion vector representing a spatio-temporal correspondence between the plurality of reproduced images, and using the generated motion vector and the plurality of reproduced images obtained by the video data decoding means, the spatial resolution is higher than that of the plurality of reproduced images. First high-resolution image is generated, and based on the auxiliary motion information obtained by the auxiliary data decoding means, the generated first high-resolution image and the high resolution stored in the image memory Resolution expansion means for generating a second high-resolution image using the image,
  Image storage means for storing the first or second high-resolution image generated by the resolution expansion means in the image memory;
  An image decoding apparatus comprising:

  A coded data decoding step for receiving encoded data and entropy decoding to obtain a motion vector generation condition as a condition necessary for generating a motion vector and encoded information indicating a prediction error image signal;
  A motion vector generation step of generating a motion vector from the decoded image signal stored in the image memory based on the motion vector generation condition obtained in the encoded data decoding step;
  A predicted image signal generation step of generating a predicted image signal using the motion vector generated in the motion vector generation step and the decoded image signal;
  A decoding step of decoding the encoded information obtained in the encoded data decoding step to obtain a prediction error image signal;
  The predicted image signal generated in the predicted image signal generation step and the prediction error image signal obtained in the decoding step are added to restore the decoded image signal, and the decoded image signal is stored in the image memory Saving step to
  An image decoding method comprising:

  An input step for inputting an input image signal;
  A motion vector generation condition determination step for determining a motion vector generation condition as a condition necessary for generating a motion vector based on the input image signal input in the input step;
  A motion vector generation step of generating a motion vector from the decoded image signal stored in the image memory based on the motion vector generation condition determined in the motion vector generation condition determination step;
  A predicted image signal generating step of generating a predicted image signal using the motion vector generated in the motion vector generating step and the decoded image signal;
  A prediction error image signal generation step of generating a prediction error image signal from the input image signal input in the input step and the prediction image signal generated in the prediction image signal generation step;
  An encoding information acquisition step for encoding the prediction error image signal generated in the prediction error image signal generation step to obtain encoding information;
  A local decoding step of decoding the encoded information obtained in the encoded information acquisition step to obtain a decoded prediction error image signal;
  The decoded image signal is restored from the predicted image signal generated in the predicted image signal generation step and the decoded prediction error image signal obtained in the local decoding step, and the decoded image signal is stored in the image memory. A save step;
  An encoded data generation step for generating encoded data by entropy encoding the motion vector generation condition determined in the motion vector generation condition determination step and the encoded information obtained in the encoded information acquisition step; ,
  An image encoding method comprising:

  A computer provided in the image decoding device,
  Encoded data decoding means for receiving encoded data and entropy decoding to obtain a motion vector generation condition as a condition necessary for generating a motion vector and encoded information indicating a prediction error image signal;
  An image memory for storing the decoded image signal;
  Motion vector generation means for generating a motion vector from the decoded image signal stored in the image memory based on the motion vector generation condition obtained by the encoded data decoding means;
  Predicted image signal generating means for generating a predicted image signal using the motion vector generated by the motion vector generating means and the decoded image signal;
  Decoding means for decoding the encoded information obtained by the encoded data decoding means to obtain a prediction error image signal;
  The prediction image signal generated by the prediction image signal generation unit and the prediction error image signal obtained by the decoding unit are added to restore the decoded image signal, and the decoded image signal is stored in the image memory means,
  Decoding program for functioning as

  A computer provided in the image encoding device,
  An input means for inputting an input image signal;
  An image memory for storing the decoded image signal;
  Motion vector generation condition determining means for determining a motion vector generation condition as a condition necessary for generating a motion vector based on the input image signal input by the input means;
  Motion vector generation means for generating a motion vector from the decoded image signal stored in the image memory based on the motion vector generation condition determined by the motion vector generation condition determination means;
  A predicted image signal generating unit that generates a predicted image signal using the motion vector generated by the motion vector generating unit and the decoded image signal;
  Prediction error image signal generation means for generating a prediction error image signal from the input image signal input by the input means and the prediction image signal generated by the prediction image signal generation means;
  Encoding information acquisition means for encoding the prediction error image signal generated by the prediction error image signal generation means to obtain encoding information;
  Local decoding means for decoding the encoded information obtained by the encoded information acquisition means to obtain a decoded prediction error image signal;
  Storage means for restoring the decoded image signal from the predicted image signal generated by the predicted image signal generation means and the decoded prediction error image signal obtained by the local decoding means, and storing the decoded image signal in the image memory When,
  Encoded data generating means for entropy encoding the motion vector generating condition determined by the motion vector generating condition determining means and the encoded information obtained by the encoded information acquiring means to generate encoded data;
  An image encoding program for functioning as