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EUROPAR
2005
Springer
9 years 2 months ago
DCT Block Conversion for H.264/AVC Video Transcoding
In H.264/AVC [1], integer transforms are applied instead of the 8×8 discrete cosine transform (DCT) of previous standards to avoid inverse transform mismatch problems. However, th...
Joo-Kyong Lee, Ki-Dong Chung
ICMCS
2005
IEEE
148views Multimedia» more  ICMCS 2005»
9 years 2 months ago
Compressed Domain Image Indexing and Retrieval Based on the Minimal Spanning Tree
In this paper, a method for content-based retrieval of JPEG images is presented, utilizing features directly from the discrete cosine transform (DCT) domain. Image indexing is ach...
Christos Theoharatos, Vassilios K. Pothos, George ...
FPT
2005
IEEE
133views Hardware» more  FPT 2005»
9 years 2 months ago
FPGA-Based Conformance Testing and System Prototyping of an MPEG-4 SA-DCT Hardware Accelerator
Two FPGA implementations of a Shape Adaptive Discrete Cosine Transform (SA-DCT) accelerator are presented in this paper: one PCI-based and the other AMBA-based. The former is used...
Andrew Kinane, Alan Casey, Valentin Muresan, Noel ...
ACCV
2006
Springer
9 years 3 months ago
An Efficient Real Time Low Bit Rate Video Codec
The implementation of a codec for real time applications such as video-conferencing at low bit rates is discussed. The discrete cosine transform has been used for compression, both...
Shikha Tripathi, R. Vikas, R. C. Jain
FPL
2007
Springer
190views Hardware» more  FPL 2007»
9 years 3 months ago
Automatic Accuracy-Guaranteed Bit-Width Optimization for Fixed and Floating-Point Systems
In this paper we present Minibit+, an approach that optimizes the bit-widths of fixed-point and floating-point designs, while guaranteeing accuracy. Our approach adopts differen...
William G. Osborne, Ray C. C. Cheung, José ...
ISCAS
2007
IEEE
95views Hardware» more  ISCAS 2007»
9 years 3 months ago
A Universal Approach to Developing Fast Algorithm for Simplified Order-16 ICT
—Simplified order-16 Integer Cosine Transform (ICT) has been proved to be an efficient coding tool especially for High-Definition (HD) video coding and is much simpler than ICT a...
Jie Dong, King Ngi Ngan, Chi-Keung Fong, Wai-kuen ...
ICMCS
2007
IEEE
163views Multimedia» more  ICMCS 2007»
9 years 3 months ago
Using Deformable Surface Models to Derive a DCT-Like 2D Transform
This paper introduces a ¢¤£ discrete, non-separable transform for image processing, which can be regarded as a combination of the well known Discrete Cosine Transform (DCT) wit...
Michail Krinidis, Nikos Nikolaidis, Ioannis Pitas
ICC
2007
IEEE
9 years 3 months ago
ML CFO and PO Estimation in DCT OFDM Systems under Non-Circular Transmissions
Abstract— Frequency synchronization is one of the most important components in orthogonal frequency-division multiplexing (OFDM) systems. Recently, the discrete cosine transform ...
Tao Cui, Feifei Gao, Arumugam Nallanathan, Chintha...
IDA
2009
Springer
9 years 3 months ago
Image Coding and Compression with Sparse 3D Discrete Cosine Transform
In this paper, an algorithm for image coding based on a sparse 3-dimensional Discrete Cosine Transform (3D DCT) is studied. The algorithm is essentially a method for achieving a su...
Hamid Palangi, Aboozar Ghafari, Massoud Babaie-Zad...
ICASSP
2009
IEEE
9 years 4 months ago
Distributions of 3D DCT coefficients for video
The three-dimensional discrete cosine transform (3D DCT) has been proposed as an alternative to motion-compensated transform coding for video content. However, so far no definiti...
Malavika Bhaskaranand, Jerry D. Gibson
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