Complexity management for video encoders
Proceedings of the tenth ACM international conference on Multimedia
New DCT Computation Technique Based on Scalable Resources
Journal of VLSI Signal Processing Systems
Complexity-Scalable Transform Coding Using Variable Complexity Algorithms
DCC '00 Proceedings of the Conference on Data Compression
Complexity-distortion tradeoffs in variable complexity 2-D DCT
ACM-SE 42 Proceedings of the 42nd annual Southeast regional conference
Survey on Block Matching Motion Estimation Algorithms and Architectures with New Results
Journal of VLSI Signal Processing Systems
Complexity controllable DCT for real-time H.264 encoder
Journal of Visual Communication and Image Representation
Efficient predictive model of zero quantized DCT coefficients for fast video encoding
Image and Vision Computing
Wyner-Ziv-based bidirectionally decodable video coding
Journal of Visual Communication and Image Representation
A novel analytic quantization-distortion model for hybrid video coding
IEEE Transactions on Circuits and Systems for Video Technology
Motion estimation optimization for H.264/AVC using source image edge features
IEEE Transactions on Circuits and Systems for Video Technology
A video coding scheme based on joint spatiotemporal and adaptive prediction
IEEE Transactions on Image Processing
An early mode decision algorithm for H.264 optimization
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
Low complexity intra mode selection for efficient distributed video coding
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Power and distortion optimization for pervasive video coding
IEEE Transactions on Circuits and Systems for Video Technology
Early determination of zero-quantized 8 × 8 DCT coefficients
IEEE Transactions on Circuits and Systems for Video Technology
Foveation embedded DCT domain video transcoding
Journal of Visual Communication and Image Representation
A novel multiple description approach to predictive video coding
PCM'07 Proceedings of the multimedia 8th Pacific Rim conference on Advances in multimedia information processing
Adaptive correlation estimation for general Wyner-Ziv video coding
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
DCT-domain coder for digital video applications
Journal of Real-Time Image Processing
A new rate-quantization model for H.264/AVC low-delay rate control
PCM'12 Proceedings of the 13th Pacific-Rim conference on Advances in Multimedia Information Processing
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Digital video coding standards such as H.263 and MPEG are becoming more and more important for multimedia applications. Due to the huge amount of computations required, there are significant efforts to speed up the processing of video encoders. Previously, the efforts were mainly focused on the fast motion-estimation algorithm. However, as the motion-estimation algorithm becomes optimized, to speed up the video encoders further we also need to optimize other functions such as the discrete cosine transform (DCT) and inverse DCT (IDCT). In this paper, we propose a theoretical model for DCT coefficients. Based on the model, we develop an adaptive algorithm to reduce the computations of DCT, IDCT, quantization, and inverse quantization. We also present a fast DCT algorithm to speed up the calculations of DCT further when the quantization step size is large. We show, by simulations, that significant improvement in the processing speed can be achieved with negligible video-quality degradation, We also implement the algorithm in a real-time PC-based platform to show that it is effective and practical