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信噪比和分辨率是评价电视图像质量的两个主要性能指标，本文从理论和实际应用方面，探讨限制这两个指标的主要因素及其对放像画面清晰度的影响．
Signal-to-noise ratio and resolution are the two major performance indicators for evaluating the quality of television images. This article discusses the main factors that limit these two indicators and their impact on the definition of the playback image from the theoretical and practical aspects.