Name
Abstract | ||
|---|---|---|
The paper presents a Design Space Exploration (DSE) experiment which has been carried out in order to determine the optimum FPGA-based Variable-Length Decoder (VLD) computing resource and its associated instructions, with respect to an entropy decoding task which is to be executed on the FPGA-augmented TriMedia/CPU64 processor. We first outline the extension of the TriMedia/CPU64 architecture, which consists of an FPGA-based Reconfigurable Functional Unit (RFU) and the associated generic instructions. Then we address entropy decoding and propose a strategy to partially break the data dependency related to variable-length decoding. Three VLDs (VLD-1, VLD-2, VLD-3) instructions which can return 1, 2, or 3 symbols, respectively, are subsequently analyzed. After completing the DSE, we determined that VLD-2 instruction leads to the most efficient entropy decoding in terms of instruction cycles and FPGA area. The FPGA-based implementation of the computing resource associated to VLD-2 instruction is subsequently presented. When mapped on an ACEX EP1K100 FPGA from Altera, VLD-2 exhibits a latency of 8 TriMedia cycles, and uses all the Electronic Array Blocks and 51% of the logic cells of the device. The simulation resultsindicate that the VLD-2-based entropy decoder is 43% faster than its pure software counterpart. |
Year | DOI | Venue |
|---|---|---|
2002 | 10.1109/FPGA.2002.1106680 | FCCM |
Keywords | Field | DocType |
decoding,discrete cosine transforms,field programmable gate arrays,microprocessor chips,variable length codes,FPGA-augmented TriMedia/CPU64,MPEG-compliant entropy decoding,data dependency,design space exploration experiment,logic cells,optimum FPGA-based variable-length decoder | Data dependency,Computer aided instruction,Latency (engineering),Computer science,Parallel computing,Field-programmable gate array,Real-time computing,Software,Decoding methods,Design space exploration,TriMedia | Conference |
ISBN | Citations | PageRank |
0-7695-1801-X | 7 | 0.92 |
References | Authors | |
10 | 5 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Mihai Sima | 1 | 95 | 16.66 |
| Sorin Cotofana | 2 | 245 | 39.03 |
| Stamatis Vassiliadis | 3 | 2007 | 227.06 |
| Jos T. J. van Eijndhoven | 4 | 135 | 16.27 |
| Kees A. Vissers | 5 | 1136 | 104.30 |