• Publications
  • Influence
Orthogonal Transforms for Digital Signal Processing
  • K. Rao, N. Ahmed
  • Mathematics, Computer Science
  • IEEE Transactions on Systems, Man, and…
  • 1979
TLDR
The utility and effectiveness of these transforms are evaluated in terms of some standard performance criteria such as computational complexity, variance distribution, mean-square error, correlated rms error, rate distortion, data compression, classification error, and digital hardware realization. Expand
High efficiency video coding
  • K. Rao
  • Computer Science
  • Signal Processing: Algorithms, Architectures…
  • 1 September 2016
TLDR
This work has shown that real time software decoding of 4K (3840×2160) video with HEVC is feasible on current desktop CPUs using four CPU cores and that encoding 4K video in real time on the other hand is a challenge. Expand
A new fast algorithm for the unified forward and inverse MDCT/MDST computation
TLDR
The new fast algorithm can be adopted for the MDCT computation in the current audio coding standards such as MPEG family, and in commercial products such as Sony MiniDisc/ATRAC/ ATRAC2/SDDS digital audio coding systems, the AT & T Perceptual Audio Coder or Lucent Technologies PAC/Enhanced PAC/Multichannel PAC, and Dolby Labs AC-3 digital audio compression algorithm. Expand
Video coding standards: AVS China, H.264/MPEG-4 part 10, HEVC, VP9, DIRAC and VC-1
  • K. Rao
  • Computer Science
  • Signal Processing: Algorithms, Architectures…
  • 1 September 2013
TLDR
Video coding standards: AVS China, H.264/MPEG-4 PART 10, HEVC (high efficiency video coding a.k.a. H.265), VP9 (Google), DIRAC (BBC) and VC-1 (SMPTE) are presented. Expand
The fast generalized discrete Fourier transforms: A unified approach to the discrete sinusoidal transforms computation
TLDR
The resulting generalized signal flow graphs for the computation of different versions of the GDFT represent simple and compact unified approach to the fast discrete sinusoidal transforms computation. Expand
Fast Complex BIFORE Transform by Matrix Partitioning
Using elementary matrix partitioning techniques, a fast algorithm for computing the complex BIFORE transform is developed.
HEVC vs . H . 264 / AVC Standard Approach to Coder ’ s Performance Evaluation
The H.264/AVC standard achieves much higher coding efficiency than the H.263, MPEG-2 and MPEG-4 standard, due to its improved inter and intra-prediction modes at the expense of higher computationExpand
Image-independent optimal non-negative integer bit allocation technique for the DCT-based image transform coders
TLDR
The results show that the proposed IIONIBA technique delivers better quantisation and provides significant gains in the image quality indexes as compared to the recent quantisation techniques. Expand
Low complexity AVS-M using Machine learning algorithm C4.5
TLDR
The proposed encoder, on an average reduces the encoding time of the sequence by 75%, with an average loss of only 2% in PSNR while saving considerable number of bits used to encode the sequence. Expand