Title :
A Balanced Vector-Quantization Processor Eliminating Redundant Calculation for Real-Time Motion Picture Compression
Author :
Konda, Masahiro ; Nakayama, Takahiro ; Miyamoto, Naoto ; Ohmi, Tadahiro
Author_Institution :
Tohoku Univ., Sendai
Abstract :
A balanced vector-quantization (VQ) processor has been developed for real-time encoding of motion pictures (640times480 pixels) by using FPGA. The VQ processor employs a search algorithm for VQ encoding to reduce computational complexity and hardware volume. And this VQ processor employs a new architecture of distance calculation unit. By adopting the pipeline composition of each element, the number of distance calculation units could be reduced compared with fully parallel hardware architecture. Besides, in order to reduce memory size of codebook, 2048 template vectors consist of 512 basic template vectors, and the distance calculation units using pipeline composition are arranged in parallel for rotated template vectors. As a result, real-time VQ processor on FPGA is balanced architecture compared with the fully parallel architecture.
Keywords :
field programmable gate arrays; image coding; logic design; microprocessor chips; parallel architectures; vector quantisation; VQ encoding; balanced vector-quantization processor; computational complexity; distance calculation unit; field programmable gate arrays; fully parallel hardware architecture; hardware volume; memory size; motion pictures; pipeline composition; real-time VQ processor; real-time encoding; real-time motion picture compression; rotated template vectors; search algorithm; Computer architecture; Degradation; Field programmable gate arrays; Hardware; Image coding; Layout; Motion pictures; Pipelines; Transform coding; Vector quantization;
Conference_Titel :
Field-Programmable Technology, 2007. ICFPT 2007. International Conference on
Conference_Location :
Kitakyushu
Print_ISBN :
978-1-4244-1472-7
Electronic_ISBN :
978-1-4244-1472-7
DOI :
10.1109/FPT.2007.4439277
