On a Real-Time Walsh-Hadamard/Cosine Transform Image Processor
- 1 August 1978
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electromagnetic Compatibility
- Vol. EMC-20 (3) , 453-457
- https://doi.org/10.1109/TEMC.1978.303679
Abstract
A real-time image processor which is capable of video compression using either the sequency-ordered Walsh-Hadamard transform (WHT)W, or the discrete cosine transform (DCT), is considered. The processing is done on an intraframe basis in (8 X 8) data blocks. The (WHT)W coefficients are computed directly, and then used to obtain the DCT coefficients. This is achieved via an (8 X 8) transformation matrix which is orthonormal, and has a block-diagonal structure. As such, it results in substantial savings in the number of multiplications and additions required to obtain the DCT, relative to its direct computation. Some aspects of a hardware implementation of the processor are also included.Keywords
This publication has 4 references indexed in Scilit:
- Real-Time Video Compression Algorithm for Hadamard Transform ProcessingIEEE Transactions on Electromagnetic Compatibility, 1976
- A Comparison Of Hardware Implementations Of The Hadamard Transform For Real-Time Image CodingPublished by SPIE-Intl Soc Optical Eng ,1975
- Real Time Television Image Bandwidth Reduction Using Charge Transfer DevicesPublished by SPIE-Intl Soc Optical Eng ,1975
- Orthogonal Transforms for Digital Signal ProcessingPublished by Springer Nature ,1975