Paper Info
Title
A Two-Level Sliding-Windowvbr Controller For Real-Time Hierarchical Video Coding
Abstract
In this paper, a novel rate control algorithm for real-time VBR hierarchical video coding is proposed. The algorithm works at two levels that are called long-and short-term levels. The long-term level aims at ensuring that the bit count does not exceed the maximum allowed amount for a few-second long window. To this end, it considers a sliding window spanning several GOPs, which is shifted on a GOP basis. In doing so, it avoids the potentially sharp adjustments at the end of the GOP that usually happen in non-sliding approaches. The short-term level aims to provide a proper QP adaptation to fit the target bit budget, which is dictated by the long-term level. It also uses a sliding window, which in this case extends over one GOP. The proposed algorithm has been assessed in realistic conditions for a variety of video sequences. It has been compared to both a constant quality and CBR hierarchical approaches, showing an excellent performance in terms of both rate-distortion and PSNR variation.
Year
DOI
Venue
2010
10.1109/ICIP.2010.5651371
2010 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING
Keywords
Field
DocType
Rate control, VBR, sliding window, real-time
Control algorithm,Control theory,Sliding window protocol,Computer science,Bit rate,Constant bitrate,Real-time computing,Coding (social sciences),Variable bitrate,Encoding (memory)
Conference
ISSN
Citations 
PageRank 
1522-4880
2
0.36
References 
Authors
8
4
Name
Order
Citations
PageRank
Manuel de-Frutos-López1143.13
Oscar del-Ama-Esteban220.70
Sergio Sanz Rodríguez3346.01
Fernando Díaz-de-María420132.14