Video encoding apparatus, video encoding method, video encoding program, video decoding apparatus, video decoding method and video decoding program

Abstract

In the motion compensation prediction unit 2 of the video encoding apparatus 1, complexity information which indicates a degree of complexity of movement from the reference frame for each of the plurality of blocks in which a coding target image is divided. The predicted image is generated by using a prediction reference image to which filtering pixels are provided in accordance with the complexity information on the basis of a predetermined rule which increases the number of the filtering pixels which have pixel values produced by applying low-pass filter with strong high-frequency cutoff characteristics among a plurality of low-pass filters with different high-frequency cutoff characteristics to neighborhood integer pixels.

Description

RELATED APPLICATIONS[0001]This application is a continuation application of U.S. patent application Ser. No. 10 / 810,792 filed on Mar. 26, 2004, which claims priority to JP 2003-088618 filed on Mar. 27, 2003, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a video encoding apparatus, a video encoding method, a video encoding program, a video decoding apparatus, a video decoding method, and a video decoding program.[0004]2. Description of the Related Art[0005]Generally, in a video encoding apparatus, a coding target frame is divided into a plurality of blocks of predetermined size, and motion compensation prediction between each of the blocks and a prediction reference image of a predetermined region in a reference frame is performed so that motion vectors are detected, thus producing a predicted image of the coding target frame. In the video encoding apparatus, the codin...

AI Technical Summary

Benefits of technology

The present invention provides a video encoding apparatus, method, and program that improve the efficiency of motion compensation prediction and filtering pixels to reduce redundancy and improve the resolution of motion compensation prediction. The invention extracts complexity information for each block of the coding target frame and generates a prediction reference image with filtering pixels that have a narrow spectral band-pass in low frequency band. This results in a more precise motion compensation prediction and reduces the difference between the predicted image and the processing target block, reducing redundancy. The invention also includes a video decoding apparatus that utilizes the motion compensation prediction and filtering pixels for efficient video compression and restoration.

Problems solved by technology

In the abovementioned video encoding apparatus, the following problem is encountered: namely, although the redundancy is reduced by providing the funny positions in the case of blocks of the coding target frame in which the variation from the reference frame is large, the provision of the funny positions increase the difference from the reference frames in the case of blocks of the coding target frame in which the variation from the reference frame is small, so that the effect of achieving high resolution of motion compensation prediction is lost.

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