A Two-Channel Picture Coding System: I--Real-Time Implementation
Donald E. Troxel, William F. Schreiber, Robert L. Bishop, Robert Buckley, G. Bunza, Takeo Eguchi, S. Goldwasser, J. Jakubson, J.P.S. Kung, D. Ng, S. Takemoto, Etsuro Yokoyama · IRE Transactions on Communications Systems · 1981
The two-channel system previously reported has been implemented in hardware using system parameters appropriate to consumer television. The basic system divides the spectrum into lowand high-frequency spatial components. The lows are coarsely sampled and finely quantized and the highs finely sampled and coarsely quantized using a companded, randomized quantizer. The purpose of this experiment was to demonstrate the potential of the system for low-cost practical application, to study the effect of the character of the randomizing noise, and to ascertain that there were no deleterious effects due to interlace, motion, or input noise. Theoretical noise calculations were qualitatively confirmed.