An Improved QP Setting Algorithm of I Frame and Its Application in Scene Change

doi:10.13190/jbupt.200806.99.wanghy

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2008, Vol. 31 ›› Issue (6): 99-103.doi: 10.13190/jbupt.200806.99.wanghy

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An Improved QP Setting Algorithm of I Frame and Its Application in Scene Change

WANG Hai-ying , ZHANG Xin-fa

(School of Information and Communication Engineering , Beijing University of Posts and Telecommunications,
Beijing 100876, China)

Received:2008-04-04 Revised:2008-07-23 Online:2008-12-31 Published:2008-12-31
Contact: WANG Hai-ying

Abstract

Abstract:

A new QP setting algorithm of I frame based on H.264 is proposed. The improved method establishes a rate-quantization(R-Q) model by using gradient-based picture complexity measure. Simulation shows that by using the proposed scheme, a better rate control accuracy and a higher PSNR gain will be achieved. When applied to scene change, the number of skipped frames will be significantly reduced and the overall subjective quality of the reconstructed video will be provided.

Key words: rate control, gradient, scene change

CLC Number:

TN919.81

WANG Hai-ying , ZHANG Xin-fa

. An Improved QP Setting Algorithm of I Frame and Its Application in Scene Change[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2008, 31(6): 99-103.

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An Improved QP Setting Algorithm of I Frame and Its Application in Scene Change

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