International Journal of Applied Research
Vol. 2, Issue 9, Part I (2016)
Trends and issues in developing fast block motion estimation algorithms
Shaifali M Arora
With the tremendous use of videos in all spheres of like Video conferencing, video Surveillance, High definition TVs etc., the demand to enhance the compression and quality of videos w.r.t the existing standards is the need of the day. As it is known a sequence of image frames are presented at such a high speed per sec that to the human eyes it seems like a video. Basically video data is composed of sequence of image frames and the change between the consecutive frames is very small. So lots of existing temporal and spatial redundancy is removed to achieve high video compressions. While encoding, instead of coding the whole frames independently, the difference between the consecutive frames is encoded. For this, Frame is divided into Blocks and the displacement of the current block in the current frame with respect to the best matching block in the reference frame is found which is known as motion vector. The most time consuming job of the Video encoder, is to find the motion vectors. To fasten the process of motion estimation a lot of research had been done by many researchers and came up with a no. of standards like MPEG1 to H.264 time to time to meet the needs of upcoming technologies. This review paper gives an over view of the need of video compression, basics of video encoding, the matching criterion for finding Motion Vectors, Fast Block Motion finding Algorithms and factors that may help in improving the quality and reducing the computations in a Video Encoder.
How to cite this article:
Shaifali M Arora. Trends and issues in developing fast block motion estimation algorithms. Int J Appl Res 2016;2(9):607-613.