Statistical distributions of image DCT coefficients
Computers and Electrical Engineering
Fundamentals of digital image processing
Fundamentals of digital image processing
Performance enhancement of H.263 encoder based on zero coefficient prediction
MULTIMEDIA '97 Proceedings of the fifth ACM international conference on Multimedia
A multimedia video conference system: using region base hybrid coding
IEEE Transactions on Consumer Electronics
A mathematical analysis of the DCT coefficient distributions for images
IEEE Transactions on Image Processing
On the modeling of DCT and subband image data for compression
IEEE Transactions on Image Processing
Modeling DCT coefficients for fast video encoding
IEEE Transactions on Circuits and Systems for Video Technology
Low-complexity transform and quantization in H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Efficient prediction algorithm of integer DCT coefficients for H.264/AVC optimization
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
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Discrete cosine transform (DCT), quantization (Q), inverse quantization (IQ) and inverse DCT (IDCT) are the building blocks in video coding standards adopted by ITU-T and MEPG. Under these standards, a lot of computations are required to perform the DCT, Q, IQ and IDCT operations. 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. Compared with other predictive models in the literature, the proposed model can detect more ZQDCT coefficients. Simulation results demonstrate that the proposed statistical model is superior to others in terms of speeding up video encoders. 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.