CONSIDERATION OF CAMERA SNR FROM THE VIEWPOINT OF BIT-RATE REDUCTION - A COMPARISON BETWEEN PROGRESSIVE AND INTERLACE SCANNING FOR HDTV

Picture quality of a bit-rate reduced transmission system is affected by the signal-to-noise ratio (SNR) of the source signal, as the source noise increases the entropy of the signal. The influence of the sourc e noise becomes remarkable when the bit rate is markedly reduced or th e source signal contains a high noise level; therefore, the source SNR is one of the key factors in the design of digital TV systems. This a rticle analyzes the camera noise, which is inevitably included in stud io production signals, and discusses its influence on a bit-rate reduc tion, system in HDTV environments.