Open Access

Efficient Video Transcoding from H.263 to H.264/AVC Standard with Enhanced Rate Control

EURASIP Journal on Advances in Signal Processing20062006:083563

https://doi.org/10.1155/ASP/2006/83563

Received: 11 August 2005

Accepted: 18 February 2006

Published: 4 May 2006

Abstract

A new video coding standard H.264/AVC has been recently developed and standardized. The standard represents a number of advances in video coding technology in terms of both coding efficiency and flexibility and is expected to replace the existing standards such as H.263 and MPEG-1/2/4 in many possible applications. In this paper we investigate and present efficient syntax transcoding and downsizing transcoding methods from H.263 to H.264/AVC standard. Specifically, we propose an efficient motion vector reestimation scheme using vector median filtering and a fast intraprediction mode selection scheme based on coarse edge information obtained from integer-transform coefficients. Furthermore, an enhanced rate control method based on a quadratic model is proposed for selecting quantization parameters at the sequence and frame levels together with a new frame-layer bit allocation scheme based on the side information in the precoded video. Extensive experiments have been conducted and the results show the efficiency and effectiveness of the proposed methods.

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Authors’ Affiliations

(1)
School of Electrical & Electronic Engineering, Nanyang Technological University

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Copyright

© Nguyen and Tan 2006