Decoding device

Abstract

A frame memory successively stores post-filter data in such a manner that 1-column / 1-row pre-filter data extending along the right and lower sides of each block are not overwritten by the post-filter data. Thus, the frame memory stores both the post-filter data used for inter-prediction and the pre-filter data remaining for intra-prediction of a next block. The inter-prediction and the intra-prediction can be simultaneously executed based on the data stored in the frame memory.

Description

technical field [0001] The present invention relates to a decoding device that performs decoding processing on input encoded data, and performs inter-frame prediction using multi-frame data and intra-frame prediction based on intra-frame data, thereby obtaining decoded image data, and for the obtained decoded image The data is filtered by the filter to restore the image data. Background technique [0002] Conventionally, H.264 has been known as one of encoding / decoding methods for moving images. Like MPEG2, MPEG4, etc., this H.264 utilizes a coding scheme based on transformation / quantization processing in the time domain ←→ frequency domain such as motion compensation and inverse transform. Furthermore, in this method, since decoding processing is performed for each block, there is a deblocking filter for reducing block distortion in decoded data. [0003] Furthermore, this H.264 decoding device uses unfiltered data for prediction based on intra-frame data (intra-frame pre...

AI Technical Summary

Problems solved by technology

However, this decoding device has the largest decoded image memory and needs one frame size, and there is a problem that a large-capacity memory is required, resulting in an increase in circuit scale.

In addition, the circuit for reading the decoded image memory and the circuit accommodated are also one of the reasons for the increase in the circuit scale.

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