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Conference Paper
A Fast Inter Mode Decision Algorithm in H.264/AVC for IPTV Broadcasting Services
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- Authors
- Geun-Yong Kim, Bin-Yeong Yoon, Yo-Sung Ho
- Issue Date
- 2007-01
- Citation
- Visual Communications and Image Processing 2007 (SPIE 6508), v.6508, pp.1-10
- Language
- English
- Type
- Conference Paper
- Abstract
- The new video coding standard H.264/AVC employs the rate-distortion optimization (RDO) method for choosing the best coding mode. However, since it increases the encoder complexity tremendously, it is not suitable for real-time applications, such as IPTV broadcasting services. Therefore we need a fast mode decision algorithm to reduce its encoding time. In this paper, we propose a fast mode decision algorithm considering quantization parameter (QP) because we have noticed that the frequency of best modes depends on QP. In order to consider these characteristics, we use the coded block pattern (CBP) that has "0" value when all quantized discrete cosine transform (DCT) coefficients are zero. We also use both the early SKIP mode and early 16×16 mode decisions. Experimental results show that the proposed algorithm reduces the encoding time by 74.6% for the baseline profile and 72.8% for the main profile, compared to the H.264/AVC reference software. © 2007 SPIE-IS&T.
- KSP Keywords
- Decision algorithm, Discrete cosine Transform, Encoder Complexity, Encoding time, Fast Mode Decision, Inter Mode Decision, Quantization parameters, Rate-Distortion Optimization(RDO), Real-time application, Skip mode, baseline profile