Real-time DSP implementation of motion-JPEG2000 using overlapped block transferring and parallel-pass methods

Real-Time Imaging Pub Date : 2004-10-01 DOI:10.1016/j.rti.2004.08.003

Byeong-Doo Choi, Kang-Sun Choi, Min-Cheol Hwang, Jun-ki Cho, Sung-Jea Ko

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引用次数: 12

Abstract

This paper presents a real-time implementation of Motion-JPEG2000 encoder using a fixed-point DSP chip. Among several modules in JPEG2000 encoder, the lifting algorithm for discrete wavelet transform (DWT) and the embedded block coding with optimized truncation (EBCOT) comprise more than 85% of the encoding complexity. Thus, it is very important to design and optimize these two modules in order to increase the performance of the hardware implementation. First we propose an overlapped block transferring (OBT) method that can significantly improve the performance of the lifting algorithm for DWT by increasing the cache hit rate. We show that the execution time of the lifting scheme can be further reduced by programming the DSP software using the single instruction multiple data (SIMD) instructions and the super scalar pipeline structure. Moreover, we introduce a parallel-pass method for fast implementation of EBCOT. This method reduces the processing time of EBCOT by processing the three coding passes of the same bit-plane in parallel. Experimental results show that our developed Motion-JPEG2000 DSP system meets the common requirement of the real-time video coding [30 frames/s (fps)] and is proven to be a practical and efficient DSP solution.

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运动- jpeg2000的实时DSP实现采用重叠块传输和并行通道方法

本文介绍了一种基于定点DSP芯片的Motion-JPEG2000编码器的实时实现方法。在JPEG2000编码器的几个模块中，离散小波变换提升算法(DWT)和优化截断嵌入式分组编码(EBCOT)占编码复杂度的85%以上。因此，为了提高硬件实现的性能，对这两个模块进行设计和优化是非常重要的。首先，我们提出了一种重叠块传输(OBT)方法，该方法可以通过提高缓存命中率来显著提高DWT提升算法的性能。通过使用单指令多数据(SIMD)指令和标量管道结构对DSP软件进行编程，可以进一步缩短提升方案的执行时间。此外，我们还介绍了一种快速实现EBCOT的并行通道方法。该方法通过并行处理同一位平面的三个编码通道，减少了EBCOT的处理时间。实验结果表明，我们开发的Motion-JPEG2000 DSP系统满足实时视频编码的一般要求[30帧/秒(fps)]，是一种实用高效的DSP解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Real-Time Imaging

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