3-D non-orthogonal sampling for motion pictures with spectrum-adaptive bandlimitation

A three-dimensional (3-D) non-orthogonal sampling technique is proposed in this paper. Orthogonally-sampled original motion pictures are first bandlimited in accordance with their spectral distribution by a bandlimiting technique. Then, the pictures are downsampled into body-centered cubic sampling (BCCS), which is known as one of the typical 3-D non-orthogonal samplings. If the maximum resolutions on the horizontal, vertical, and temporal axes in the 3-D frequency domain are equal for these two sampling schemes, BCCS can reduce the data amount to a quarter of that of the orthogonal sampling. The spectral adaptation proposed in this paper avoids degradation of picture quality such as ringing in still pictures or blurring in moving pictures without introducing heavy aliasing error. The examples given in this paper demonstrate these advantages.