• Publications
  • Influence
Fast algorithm for computing discrete cosine transform
  • C. Kok
  • Mathematics, Computer Science
  • IEEE Trans. Signal Process.
  • 1 March 1997
TLDR
An efficient method for computing the discrete cosine transform (DCT) is proposed. Expand
  • 141
  • 18
Efficient prediction algorithm of integer DCT coefficients for H.264/AVC optimization
  • Hanli Wang, S. Kwong, C. Kok
  • Mathematics, Computer Science
  • IEEE Transactions on Circuits and Systems for…
  • 1 September 2006
TLDR
We propose a novel efficient prediction algorithm to reduce redundant discrete cosine transform (DCT) and quantization computations for H.264 encoding optimization. Expand
  • 66
  • 6
  • PDF
Estimation of Two-Dimensional Frequencies Using Modified Matrix Pencil Method
TLDR
The problem of multiple two-dimensional (2-D) sinusoidal frequency estimation is considered. Expand
  • 35
  • 5
  • PDF
CMOS Voltage References: An Analytical and Practical Perspective
cmos voltage references an analytical and practical perspective design of higherperformance cmos voltage controlled oscillators the gm id methodology a sizing tool for low voltage analog cmosExpand
  • 33
  • 4
  • PDF
A Modified Edge Directed Interpolation for images
  • W. Tam, C. Kok, W. Siu
  • Mathematics, Computer Science
  • 17th European Signal Processing Conference
  • 1 August 2009
TLDR
A modification of the new edge-directed interpolation method is presented. Expand
  • 106
  • 3
  • PDF
A novel gate boosting circuit for 2-phase high voltage CMOS charge pump
A novel gate boosting circuit is proposed for general switched-capacitor charge pump. The proposed circuit only requires two small transistors to generate the necessary driving signal from a clockExpand
  • 9
  • 3
MPEG-4 Video Transmission over Wireless Networks: A Link Level Performance Study
TLDR
We show that the link level performance of a wireless video transmission system can be modeled by a DBMAP/PH/1 priority queue, and present computation algorithm and numerical results for the queueing model. Expand
  • 37
  • 2
  • PDF
Interface bonding structure of hafnium oxide prepared by direct sputtering of hafnium in oxygen
The interface properties of the hafnium gate oxide films prepared by direct sputtering of hafnium in oxygen with rapid thermal annealing have been investigated in detail. X-ray photoelectronExpand
  • 58
  • 2
Fast video coding based on Gaussian model of DCT coefficients
TLDR
In this paper, a novel statistical model based on Gaussian distribution for ZQDCT coefficients prediction is proposed to avoid redundant DCT, Q, IQ and IDCT computations. Expand
  • 12
  • 2
  • PDF
Novel quantized DCT for video encoder optimization
TLDR
A novel technique is proposed to reduce the computational complexity of discrete cosine transform (DCT)-based video encoders by merging the DCT and quantization into a single procedure. Expand
  • 8
  • 2
  • PDF
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