Toshiro Ohmura

Improvement of HDTV-PAL Standard Converter Using Motion-Compensation Technique and Detection Probability of Motion Vectors

HDTV signal can be converted into the present standard TV signal with a high spatial resolution. However, some problems have been pointed out in the standard conversion with different field frequencies, which are the degradation of resolution and jitter for moving pictures. To avoid such problems, the motion compensation frame conversion method was developed, which realized a practically satisfactory standard conversion. In the development of a practical system for the standard conversion from HDTV to PAL, the quality of the converted picture is improved by improving the detection of motion vector and the processing of motion-compensated picture. The detection probability for the motion vector is investigated, and the usefulness of the motion compensation based on the detection of the motion vector used in the proposed system is verified.