Interpolação cúbica: uma análise que considera informações do processo de aquisição da sequência a ser interpolada.

In this paper, the cubic interpolation process is analyzed. We use information about the acquisition process of the sequence to be interpolated to set the cubic interpolation filter. This analysis provides relationships between the filter parameter a and the autocorrelation function of the sequence to be interpolated which minimize the MSE for many interpolation factors and degradation models of the acquisition process of the sequence to be interpolated. We note that in the limit, the parameter a tends to −2/3 or −1, 2, depending on the degradation model.