|Author's Email Address
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|Type of Document
||A study for a non-blocked motion compensation design|
|Date of Defense
||MEPG and H.26X series are two major standards of video compression. Motion compensation is an important method in the above standards. In this thesis, we follow a new method of non-block motion compensation proposed by our Lab before to compare with traditional block motion compensation. We study the visual quality and data compression for both methods. |
In the traditional MPEG, we scan whole image to calculate the motion compensation with fixed 16*16 block as an unit. Furthermore, we record the difference the shift of blocks. In some specific circumstances, it is not suitable to separate the real shape of object by blocks, which may cause a huge data as a result. There are two stage in our study. In stage one, we use optical flow (OF) to separate the area of motion object. In stage two, we get the corresponding parameters for geometry transformation to record a small amount of data.
We do our experiments by replacing motion compensation in the original MPEG-1 system. We also modify the images by mathematical morphology. It was found that the final restoration effect and the data compression effect was not as satisfactory as expected.
||Tsang-ling Sheu - chair|
Ming-feng Li - co-chair
Tsung Li - co-chair
Ben-shung Chow - advisor
indicate access worldwide|
|Date of Submission