Frame-rate up-conversion using reliable analysis of transmitted motion information
Haruka Sasai, Satoshi Kondo, Shinya Kadono · 2004
We propose a new frame-rate up-conversion algorithm using a vector reliable analysis scheme that reduces artifacts caused by the use of inaccurately transmitted motion vectors (MVs). In conventional up-conversion algorithms using motion estimation (ME), ME is performed between two adjacent decoded frames to construct MVs that allow the frame to be interpolated, irrespective of the amount of calculation for ME required. On the other hand, in conventional up-conversion algorithms using transmitted MVs, the quality of the interpolated frame depends largely on the MV that is derived by the encoder. In our proposed scheme, transmitted MVs are first analyzed to decide whether or not they are usable for constructing interpolation frames. The interpolation method is then adaptively selected from three methods: local motion-compensated interpolation, global motion-compensated interpolation and frame-repeated interpolation. The proposed method provides high quality interpolated frames and decreases the volume of calculation needed, making it especially well suited to multimedia mobile devices that depend on low-power processing.