中国空间科学技术

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变码长图像编码数据实时解码器的设计与实现

姜宏旭,程子敬,周孝宽   

  1. 北京航空航天大学宇航学院,北京航空航天大学宇航学院,北京航空航天大学宇航学院 北京100083 ,北京100083 ,北京100083
  • 发布日期:2002-12-25

Design of Real-Time Image-Decoding and Reconstructing System Based on Variable-Length Code

Jiang Hongxu Cheng Zijing Zhou Xiaokuan (Beijing University of Aeronautics and Astronautics, School of Space Technology,Beijing 100083)$$$$   

  • Published:2002-12-25

摘要： 给出了基于空间重采样图像压缩方法实时解码器的设计与实现。解码器的设计针对压缩编码算法的多模式处理及变码长的特点 ,找到一套简单有效的措施 ,实现了有非匀速环节的解码算法 ,设计中通过灵活的数据并串相互转换很好的控制了解码过程的变码长、非匀速问题 ,同时精细的并行流水线结构和高效的算术运算设计为提高解码器的速度性能 ,为高速下实现实时解码提供了保证。最终基于FPGA实现的解码器工作速度可达 2 6 4Mbit/s。

关键词: 图像编码, 超大规模集成电路, 数据处理

Abstract: An image compression and decompression algorithm of RBC(resampling based compression)is introduced,and a VLSI design and hardware implementation of the image decompression is given in details.The image coding algorithm of RBC is characterized with multimode and variable bit rate which are hard to use in hardware design.In order to resolve these problems,some simple and effective methods are given.They can not only deal with the questions of variable bit rate decoding successfully,but also greatly improve the processing speed of the decompression system.The high speed real time image data decompression hardware system is finished successfully,and its processing speed is not less than 265Mbit/s,meeting the required processing speed of 224Mbit/s.