Results 181 to 190 of about 5,165 (219)

High-fidelity steganography in EEG signals using advanced transform-based methods. [PDF]

PeerJ Comput Sci
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Real-Time Walsh-Hadamard Transformation

IEEE Transactions on Computers, 1972
A technique for obtaining the digital Walsh-Hadamard transform of two-dimensional discrete pictures in real time is presented. A considerable reduction in total time for the transformation of a picture results since the process of scanning and digitizing one picture line overlaps with computations on the previous line. This is accomplished by operating
Alexandridis, Nikitas A., Klinger, Allen
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Cal-sal Walsh-Hadamard transform

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1978
Walsh-Hadamard matrices are rearranged such that the first half of the rows represents cal functions in increasing order of sequency whereas the second half represents sal functions in decreasing order of sequency. The transform based on this rearrangement is called the Cal-Sal Walsh-Hadamard transform or (WHT) cs .
Rao, K. R., Devarajan, V., Vlasenko, V., Narasimhan, M. A.   +3 more
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Cache conscious Walsh-Hadamard transform

2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002
The Walsh-Hadamard Transform (WHT) is an important algorithm in signal processing because of its simplicity. However, in computing large size WHT, non-unit stride access results in poor cache performance leading to severe degradation in performance. This poor cache performance is also a critical problem in achieving high performance in other large size
null Neungsoo Park, N.K. Prasanna
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Discrete transforms via the Walsh-Hadamard transform

Signal Processing, 1988
Abstract Even-odd transforms (EOTs) such as the discrete cosine (DCT), the discrete sine (DST), the slant (ST) and the discrete Legendre (DLT) transforms are developed from the Walsh-Hadamard transform (WHT). Conversion matrices for all these EOTs are outlined. Computational requirements for implementing these transforms are listed.
S. Venkataraman, V.R. Kanchan, K.R. Rao, M. Mohanty   +3 more
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Spatial multiplexing using walsh-hadamard transform

2016 International Conference on Smart Green Technology in Electrical and Information Systems (ICSGTEIS), 2016
This paper proposes a model (WHT-SMX), that combines spatial multiplexing (SMX) with walsh-hadamard transform (WHT). The use of WHT is to convert transmit symbols of SMX to change location of constellation points. This is helpful in extending the Euclidean distance between transmit symbols for precise detection.
Man Hee Lee, Muhammad Basit Shahab, Md Fazlul Kader, Soo Young Shin   +3 more
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The Walsh-Hadamard/discrete Hartley transform

International Journal of Electronics, 1987
A new fast algorithm is proposed here to compute the discrete Hartley transform (DHT) via the natural-ordered Walsh-Hadamard transform. The processing is carried out on an intraframe basis in (N × N) data blocks, where N is an integer power of 2. The Walsh-Hadamard transform (WHT)W coefficients are computed directly, and then used to obtain the DHT ...
Hsu, C. Y., Wu, Ja-Ling
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Speech processing with Walsh-Hadamard transforms

IEEE Transactions on Audio and Electroacoustics, 1973
High-speed algorithms to compute the discrete Hadamard and Walsh transforms of speech waveforms have been developed. Intelligible speech has been reconstructed from dominant Hadamard or Walsh coefficients on a medium sized computer in a non-real-time mode. Degradation of some phonemes was noted at low bit rates of reconstruction, but the reconstruction
null F. Shum, A. Elliott, W. Brown
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An FPGA based Walsh Hadamard transforms

ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196), 2002
The Walsh-Hadamard transforms are important in many image processing applications including compression, filtering and code design. This paper presents a novel architecture for the fast Hadamard transform, using distributed arithmetic techniques.
A. Amira, A. Bouridane, P. Milligan
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