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Efficient predictive model of zero quantized DCT coefficients for fast video encoding
2007
Image and Vision Computing
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With this concern, a novel statistical model based on Gaussian distribution is proposed to predict zero quantized DCT (ZQDCT) coefficients in order to reduce the computational complexity of video encoding ...
Moreover, a hybrid model is derived based on the proposed statistical model and mathematical analysis of individual DCT coefficients to further improve the encoding efficiency. ...
Acknowledgement The authors acknowledge the City University of Hong Kong Strategic Grant 7001697 for the financial support. ...
doi:10.1016/j.imavis.2006.07.007
fatcat:sk7tka6nojguph4kwjbauhwjum
Modeling of 3-D DCT coefficients for fast video encoding
2008
2008 3rd International Symposium on Communications, Control and Signal Processing
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This paper proposes an analytical model to predict the zero-quantized DCT (ZQDCT) coefficients for fast 3-D DCT based video encoding. ...
On the other hand, since many DCT coefficients will be quantized to zeros, a huge number of redundant computations are introduced. ...
So we only list the FRR results in Table IV for different video sequences. Averagely, the proposed model can predict about 70% of zero quantized coefficients.
C. ...
doi:10.1109/isccsp.2008.4537302
fatcat:bf2ij3dkujbdblb2stzoh6d3se
A detection algorithm for zero-quantized DCT coefficients in JPEG
2008
Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing
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This paper presents an early detection algorithm to predict zero-quantized DCT coefficients for fast JPEG encoding. ...
Finally, the transform of the zero-quantized coefficients is omitted. ...
CONLUSION This paper proposes a detection algorithm to predict zero-quantized DCT coefficients for fast JPEG encoding. ...
doi:10.1109/icassp.2008.4517828
dblp:conf/icassp/LiTGC08
fatcat:ybmy7brrmnekxp4f2br5dmr4pu
Application of Residual Analysis in the Video Coding Fast Algorithms
2013
Journal of Information Technology and Application in Education
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High coding efficiency is the ultimate goal of developing video coding technology, but it is usually achieved at the cost of increased computation complexity. ...
This paper has introduced several typical fast algorithms which are based on residual coefficients. ...
Research and Application of DCT Coefficient Distribution Model Studying the residuals is a good starting point to improve the coding efficiency of H.264. ...
doi:10.14355/jitae.2013.0204.05
fatcat:xlfvoyzj2jatvo43u4e7pbqjyq
Analytical Model of Zero Quantized DCT Coefficients for Video Encoder Optimization
2006
2006 IEEE International Conference on Multimedia and Expo
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This paper proposes a novel analytical model to predict zero quantized DCT coefficients for fast video encoding. ...
The dynamic range of quantized DCT coefficients are analyzed and a threshold scheme is derived in order to determine DCT and quantization computations to be skipped without video quality degradation. ...
Acknowledgments The authors would like to acknowledge the City University of Hong Kong Strategic Grant 7001697 for financial support. ...
doi:10.1109/icme.2006.262602
dblp:conf/icmcs/WangKK06
fatcat:poemd2tg2jecthw25ingk6tsk4
Laplacian modeling of DCT coefficients for real-time encoding
2008
2008 IEEE International Conference on Multimedia and Expo
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This paper proposes a Laplacian based statistical model to predict zero-quantized DCT coefficients in JPEG and to reduce the computations of encoding process. ...
Moreover, it can be directly applied to other DCT-based image/video codec. Computational reduction also implies longer battery lifetime and energy economy for digital applications. ...
Basically, if we can efficiently predict the zero-quantized DCT (ZQDCT) coefficients for the 63 coefficients, a lot of computations will be saved. ...
doi:10.1109/icme.2008.4607555
dblp:conf/icmcs/LiGTC08
fatcat:6xl6bthguvbipjft5lbn5o3a6y
Hybrid Modeling of Intra-DCT Coefficients for Real-Time Video Encoding
2008
EURASIP Journal on Image and Video Processing
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However, since most DCT coefficients become zeros after quantization, a number of redundant computations are performed. ...
The two-dimensional discrete cosine transform (2-D DCT) and its subsequent quantization are widely used in standard video encoders. ...
[13] further proposed a Gaussian-based model to predict the ZQDCT coefficients for fast video encoding. ...
doi:10.1155/2008/749172
fatcat:2e27ldhnnfabzgjouj726o2ri4
Modeling DCT coefficients for fast video encoding
1999
IEEE transactions on circuits and systems for video technology (Print)
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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. ...
CONCLUSION In this paper, we propose a theoretical model for the DCT coefficients in standard video encoders. ...
doi:10.1109/76.767126
fatcat:26adp5afyjg7tde6lzx2kxwgbe
Zero-Quantized Inter DCT Coefficient Prediction for Real-Time Video Coding
2012
IEEE transactions on circuits and systems for video technology (Print)
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This paper proposes an algorithm to improve the prediction efficiency for nonall-zero-quantized DCT blocks. ...
Several algorithms were proposed to predict the zero-quantized DCT coefficients and reduce the computational complexity of transform and quantization. ...
A Gaussian distribution based model [19] was proposed in 2006 to predict the ZQDCT coefficients for fast video encoding. ...
doi:10.1109/tcsvt.2011.2160749
fatcat:oddmr6ntu5hdzekcnpo2fwpla4
Simplified video coding for digital mobile devices
2008
2008 9th International Conference on Signal Processing
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This paper proposes a statistical model to predict the zero-quantized DCT (ZQDCT) coefficients for 3-D DCT video coding and thus to speech up the encoding process. ...
for fast video coding. ...
Firstly, the proposed model can efficiently predict the ZQDCT coefficients. ...
doi:10.1109/icosp.2008.4697357
fatcat:7inxrjuxd5a23jh4hw5mivdl64
Early Determination of Zero-Quantized 8$\,\times\,$8 DCT Coefficients
2009
IEEE transactions on circuits and systems for video technology (Print)
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This paper proposes a novel approach to early determination of zero-quantized 8 × 8 discrete cosine transform (DCT) coefficients for fast video encoding. ...
all-zero or a partial-zero block, i.e., the DCT coefficients within the block are all or partially zero-quantized. ...
In encoding, DCT coefficients of each prediction error block are quantized to represent them in a reduced range of values. ...
doi:10.1109/tcsvt.2009.2026839
fatcat:lewj2gmyk5hczfvvwj46ghjywa
Gaussian Model Based Approach to Reducing DCT Computations in H.264
2007
2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07
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This paper presents an efficient method to predict zero quantized DCT coefficients in order to reduce redundant computations in H.264 encoding. ...
The Gaussian distribution is firstly applied to study the quantized integer DCT coefficients in H.264 and then an adaptive scheme with multiple thresholds is proposed to realize different types of DCT ...
In video coding, it is quite common that a substantial number of DCT coefficients of the prediction residue become zeros after Q. ...
doi:10.1109/icassp.2007.366114
dblp:conf/icassp/WangK07
fatcat:rx26yhregzeb7opvuggbngpwim
Prediction of Zero Quantized DCT Coefficients in H.264/AVC Using Hadamard Transformed Information
2008
IEEE transactions on circuits and systems for video technology (Print)
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This paper presents an efficient approach for detecting zero quantized discrete cosine transform (ZQDCT) coefficients using the sum of absolute transformed difference (SATD). ...
Previously, all the ZQDCT prediction approaches employ the sum of absolute difference (SAD) available ahead of DCT and quantization (Q) for early detection. ...
Secondly, with the increase of , the proposed approach is able to predict ZQDCT coefficients more efficiently. This can be observed by studying the FRR results for each of the test video sequences. ...
doi:10.1109/tcsvt.2008.918553
fatcat:gzgem3hxmfckld6vyaie63lw2q
Early detection of all-zero 4×4 blocks in High Efficiency Video Coding
2014
Journal of Visual Communication and Image Representation
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coefficients being quantized to zeros. ...
Similar to previous video coding standards, transform and quantization are employed in the most recent video coding standard High Efficiency Video Coding (HEVC), and there exist a large number of transform ...
] and zero subblocks/individual coefficients [28] [29] [30] for the 4 Â 4 DCT-based video encoder H.264/AVC. ...
doi:10.1016/j.jvcir.2014.08.007
fatcat:67e5v4a5dzfzjdh6vb2sckgpgu
Statistical Computation of Discrete Cosine Transform in Video Encoders
1998
Journal of Visual Communication and Image Representation
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This paper describes a scheme for reducing the required computations in video encoders by skipping some of the Discrete Cosine Transform (DCT) and quantization calculations. ...
Based on the MAE of the motion compensated difference block and the quantization level, three options for the DCT calculation can be chosen: calculating all 8x8 DCT coefficients, calculating the DC coefficient ...
Acknowledgements The authors would like to thank anonymous reviewers for valuable comments. ...
doi:10.1006/jvci.1998.0381
fatcat:jxbl6hxf3zfm5ae4uqi5juoldq
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