A study on introduction of PSD model for field merged signal and its analysis

This paper describes a theoretical model of the power spectrum density (PSD) for a field-merged frame signal, and compares the efficiency between the field based coding, and frame-based coding that uses the field-merged signal. Recently, for the coding of interlace-scanned television signals, the field-merged signal is also used as an input signal to spatial coding process. However, the nature of PSD, which is an important basis for a high efficiency coding, is not clarified enough for the field-merged signal. For instance, there is no assurance of the optimality of the conventional techniques that are applied to the field-merged signal. The author has introduced a theoretical PSD model for the field-merged signal, and has clarified its properties in relation to the motion of the image. Using the model, the performance of frame based-coding has been calculated.