CAJ | 학술논문

针对快速高效无损图像压缩系统（ FELICS）中，Golomb-Rice编码k参数选取增加系统复杂度和限制系统吞吐量的问题，依据基于上下文的图像压缩理论，采用JPEG-LS中的序列参数估计方法，研究了限长Golomb-Rice编码。给出了面向超大规模集成电路（ VLSI）实现的低功耗快速高效无损图像压缩系统。 VLSI-oriented FELICS 简化了k参数的选取，提高了系统的吞吐率；针对贝尔图像格式的算法扩展提高了FELICS算法对Bayer图像的压缩效果。在SMIC 0．13μm工艺条件下，基于该方法完成了面向低功耗胃窥镜的VLSI 设计。当系统工作在25 MHz，图像数据时钟为24 MHz时，编码每帧图像的功耗仅为11．15μW，VGA图像的吞吐率可以达到60 f/s。
침대쾌속고효무손도상압축계통（ FELICS）중，Golomb-Rice편마k삼수선취증가계통복잡도화한제계통탄토량적문제，의거기우상하문적도상압축이론，채용JPEG-LS중적서렬삼수고계방법，연구료한장Golomb-Rice편마。급출료면향초대규모집성전로（ VLSI）실현적저공모쾌속고효무손도상압축계통。 VLSI-oriented FELICS 간화료k삼수적선취，제고료계통적탄토솔；침대패이도상격식적산법확전제고료FELICS산법대Bayer도상적압축효과。재SMIC 0．13μm공예조건하，기우해방법완성료면향저공모위규경적VLSI 설계。당계통공작재25 MHz，도상수거시종위24 MHz시，편마매정도상적공모부위11．15μW，VGA도상적탄토솔가이체도60 f/s。
The Golomb-Rice code of the fast and efficient lossless image compression system ( FELICS) requires es-timation of the coding parameter value k, which increases the system complexity and limits the throughput of the system.This research into the limited-length Golomb-Rice code adopting sequential parameter estimation of JPEG-LS was made based on the context model of the image compression theory .The very large scale integration ( VLSI)-oriented low power FELICS algorithm was proposed .The VLSI-oriented low power FELICS algorithm simplified the selection of the coding parameter and improved the throughput of the system .The VLSI-oriented FELICS with Bayer expansion improved the compression ratio of the Bayer images .The VLSI design based on the proposed algorithm was implemented under the condition of the SMIC ( Semiconductor Manufacturing International Corporation ) 0.13 μm process.When the system works at 25 MHz clock frequency with a 24 MHz pixel clock frequency in VGA resolution, the power dissipation per frame is only 11.15μW, and the throughput of the system is up to 60 frames per second .