An adaptive content based H.264/AVC rate control in low bit rate video

In this paper, we analyze a rate control formula, which is Laplacian based model, then propose a content based equation for an enhanced JVT-G012 algorithm. Based on the simple and fast characteristics of the JVT-G012 algorithm, which is very suitable for real time embedded systems, we integrate the...

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Vydáno v:International journal of electronics and communications Ročník 65; číslo 6; s. 516 - 522
Hlavní autoři: Chen, Fu-Chuang, Hsu, Yi-Pin
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier GmbH 01.06.2011
Témata:
Histogram based detector
JVT-G012
Laplacian based model
Rate control
Histogram based detector
Laplacian based model
JVT-G012
Rate control
ISSN:1434-8411, 1618-0399
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Shrnutí:In this paper, we analyze a rate control formula, which is Laplacian based model, then propose a content based equation for an enhanced JVT-G012 algorithm. Based on the simple and fast characteristics of the JVT-G012 algorithm, which is very suitable for real time embedded systems, we integrate the equation into the JVT-G012 algorithm to create an efficient quantizer. However, active local motion will produce error distortion and influence the determination of the quantization parameter. To solve this problem, a modified histogram based detector is proposed. Combining this detector with the equation refines the predicted quantization parameter more precisely. It is shown both theoretically and experimentally that a well-designed quantizer not only improves video quality, but also maintains the designed bit rate budget. In addition, our algorithm can achieve superior results to existing algorithms-up to 0.72dB without large computation loading.
ISSN:1434-8411
1618-0399
DOI:10.1016/j.aeue.2010.07.010