Efficient H.264 video coding with a working memory of objects

Authors:
Wenqing Dai;Yu Sun;Zhihai He
Affiliations:
Department of Electrical and Computer Engineering, University of Missouri, Columbia, MO;Department of Computer Science, University of Central Arkansas, Conway, AR;Department of Electrical and Computer Engineering, University of Missouri, Columbia, MO
Venue:
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
Year:
2009

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Abstract

In this work, we investigate a working memory approach for efficient temporal prediction in H.264 video coding. After video frames are encoded, objects are extracted, analyzed, and indexed in a dynamic database which acts as a working memory for the H.264 video encoder. During the encoding process, objects with similar spatial characteristics are retrieved from the working memory and used for motion prediction of objects in the current video frame. This approach extends the multiple-frame estimation and provides a more generic framework for spatiotemporal prediction of video data. Our experimental results on surveillance video data demonstrate that the proposed approach is able to save the coding bit rate by up to 35% with a small computational overhead.