163 citations · 1.5k across the 45 of their papers we have counts for
8 papers · 1 filter
A Digital Hardware Fast Algorithm and FPGA-based Prototype for a Novel 16-point Approximate DCT for Image Compression Applications
F. M. Bayer, R. J. Cintra, A. Edirisuriya +1
The discrete cosine transform (DCT) is the key step in many image and video coding standards. The 8-point DCT is an important special case, possessing several low-complexity approx…
DCT-like Transform for Image Compression Requires 14 Additions Only
F. M. Bayer, R. J. Cintra
A low-complexity 8-point orthogonal approximate DCT is introduced. The proposed transform requires no multiplications or bit-shift operations. The derived fast algorithm requires o…
Low-complexity Pruned 8-point DCT Approximations for Image Encoding
V. A. Coutinho, R. J. Cintra, F. M. Bayer +2
Two multiplierless pruned 8-point discrete cosine transform (DCT) approximation are presented. Both transforms present lower arithmetic complexity than state-of-the-art methods. Th…
Energy-efficient 8-point DCT Approximations: Theory and Hardware Architectures
R. J. Cintra, F. M. Bayer, V. A. Coutinho +2
Due to its remarkable energy compaction properties, the discrete cosine transform (DCT) is employed in a multitude of compression standards, such as JPEG and H.265/HEVC. Several lo…
Low-complexity Image and Video Coding Based on an Approximate Discrete Tchebichef Transform
P. A. M. Oliveira, R. J. Cintra, F. M. Bayer +3
The usage of linear transformations has great relevance for data decorrelation applications, like image and video compression. In that sense, the discrete Tchebichef transform (DTT…
Improved 8-point Approximate DCT for Image and Video Compression Requiring Only 14 Additions
U. S. Potluri, A. Madanayake, R. J. Cintra +3
Video processing systems such as HEVC requiring low energy consumption needed for the multimedia market has lead to extensive development in fast algorithms for the efficient appro…
A DCT Approximation for Image Compression
R. J. Cintra, F. M. Bayer
An orthogonal approximation for the 8-point discrete cosine transform (DCT) is introduced. The proposed transformation matrix contains only zeros and ones; multiplications and bit-…
A Multiplierless Pruned DCT-like Transformation for Image and Video Compression that Requires 10 Additions Only
V. A. Coutinho, R. J. Cintra, F. M. Bayer +2
A multiplierless pruned approximate 8-point discrete cosine transform (DCT) requiring only 10 additions is introduced. The proposed algorithm was assessed in image and video compre…