Method video encoding and decoding preserving cache localities

Abstract

The invention relates to a method for encoding/decoding a video stream including a plurality of images (A, B, C) in a video processing apparatus having a processing unit () coupled to a first memory (), further comprising a second memory (), comprising the steps: providing a subset of image data stored in the second memory () in the first memory (), —simultaneous encoding/decoding of more than one image (B, C) of the video stream, by accessing said subset, wherein the simultaneously encoding/decoding is performed by access sharing to at least one image (A). For reducing the traffic or the number of access to second memory () an apparatus is proposed including: a processing unit () for performing an encoding/decoding process of video data; a first memory () coupled to the processing unit () for storing image data required for encoding/decoding of video data, —a second memory (), wherein the video stream includes a plurality of images (A, B, C); the first memory () is adapted to store a subset of image data of the second memory () in the first memory () and the processing unit () is adapted to simultaneously encode/decode more than one image (B, C) of the video stream by accessing said subset of image data in the first memory (), wherein the simultaneously encoding/decoding is performed by sharing access to at least one image.