Real-Time Hadamard Transform Coding for TV Signals

Analog and digital schemes for implementing the onedimensional Hadamard transform in real time for TV signals has been proposed. Within practical limitations, hardware has been developed and tested according to the scheme. The evaluation of the hardware has been carried out using a real image. Furthermore, bandwidthreduction experiments are conducted for various bit rates. Analog and digital transform coding schemes are compared for prominent performance parameters. It is demonstrated that good broadcast and video-phone quality pictures can be obtained using the first four coefficients, and the first two coefficients, respectively.