Name
Abstract | ||
|---|---|---|
In order to take advantage of the byte-type data parallelism in the existing single-instruction multiple-data (SIMD) technique, this paper introduces the concept of 8-bit partial sums, obtained by a 4-bit right-shift operation on the sum of the 16 luminance values in a column of a 16 x 16 block of a video frame. Since these partial sums are of only eight bits, eight of them can be processed concurrently in a single 64-bit SIMD register. A method of employing these partial sums in order to speed up a given block motion-estimation algorithm is then proposed. The notion of the 8-bit partial sums is extended to the four-level case. It is shown that there are 15 possible methods of utilizing these multilevel 8-bit partial sums to accelerate a block motion-estimation algorithm without any loss of accuracy of the algorithm. Each of these 15 methods is used in the full-search algorithm to determine the one that provides the lowest computational complexity. This method is adopted as the chosen scheme to accelerate various block motion-estimation algorithms. Extensive simulations are carried out on eight video sequences showing that substantial speed-up can be achieved when the chosen scheme is incorporated with the various motion-estimation algorithms. The simulation results also demonstrate that the implementation on SIMD architectures can further accelerate the execution of the proposed scheme by more than 93% percent. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1109/TCSVT.2007.898645 | Circuits and Systems for Video Technology, IEEE Transactions |
Keywords | Field | DocType |
simd architecture,various block motion-estimation algorithm,simd architectures,block motion-estimation algorithm,8-bit partial sum,full-search algorithm,chosen scheme,various motion-estimation algorithm,partial sum,fast block motion estimation,proposed scheme,64-bit simd register,8-bit partial,single instruction multiple data,partial sums,motion estimation,computer architecture,shift operator,computational complexity | Signal processing,Search algorithm,Computer science,8-bit,Parallel computing,SIMD,Data parallelism,Motion estimation,Speedup,Computational complexity theory | Journal |
Volume | Issue | ISSN |
17 | 8 | 1051-8215 |
Citations | PageRank | References |
1 | 0.36 | 10 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| C. J. Duanmu | 1 | 133 | 9.18 |
| M. O. Ahmad | 2 | 1157 | 154.87 |
| M. N.S. Swamy | 3 | 267 | 18.50 |