Moving image prediction encoding device, moving image prediction encoding method, moving image prediction encoding program, moving image prediction decoding device, moving image prediction decoding method, and moving image prediction decoding program

Abstract

Disclosed is a moving image prediction encoding device provided with: an encoding means for encoding images that have been input and generating compressed image data which includes randomly accessed images, together with encoding data in relation to display order information of the images; a restoration means for restoring reproduced images by decoding the compressed image data; an image storage means for storing the reproduced images as reference images; and a memory management means for controlling the image storage means. Once encoding processing for generating the randomly accessed images has been completed, the memory management means first of all refreshes the image storage means by setting reference images, excluding randomly accessed images, from among reference images in the image storage means as being unnecessary. The memory management means refreshes the image storage means immediately before or immediately after encoding is performed for images having display order information that is larger than the display order information of the randomly accessed images.

Description

technical field [0001] The present invention relates to a video predictive encoding device, method and program, and a video predictive decoding device, method and program. Background technique [0002] In order to efficiently transmit and store moving image data, compression coding technology is used. For dynamic images, MPEG1-4 and H.261-H.264 methods are widely used. [0003] In these encoding methods, an image to be encoded is divided into a plurality of blocks, and encoding / decoding processing is performed on each block. In order to improve coding efficiency, a predictive coding method as described below is employed. In intra-frame predictive coding, a predicted signal is generated by using adjacent reproduced image signals (signals obtained by restoring previously coded image data) in the same frame as the target block, and the signal from the target block The differential signal obtained by subtracting the predicted signal is encoded. In predictive coding between p...

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Problems solved by technology

the result is, Figure 11 Image 901 in (A) cannot be referred to, and image 901 cannot be referred to when encoding images 902, 903, and 904

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