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    To support real-time video compression, A MPEG-4 encoder based on DSP is designed.
    为解决视频压缩编码的实时性,设计基于DSP的MPEG-4编码器。
    Meanwhile, the structure of quasi-cyclic LDPC codes with reduced complexity and TMS320C6000-based software optimization technology are adopted to lower encoder complexity and guarantee real-time encoder.
    为解决LDPC码编码复杂度大,且要保证编码的实时性问题,采用了具有较低编码复杂度的准循环LDPC码的编码结构和基于TMS320C6000的软件优化技术。
    3. Under the premise of very low bitrate, the problem of real time of the coding has beenelementarily solved, by adopting the method of block DCT transform coding along with unitarymotion compensation.
    3.通过选用分块DCT变换编码结合整体运动补偿的方法,在保证了甚低码率的前提下,初步解决了编码的实时性问题。
    The three options can improve coding efficiency, but they also enhance the complexity of operation of encoder, so they affect the real time operation of encoder.
    这些可选模式的选用提高了编码性能,但同时也增加了运算的复杂度,影响了编码的实时性
    The algorithm's complexity improved with the increase of both the high compression rate and high fidelity of video and audio. Shape coding is the key technique of MPEG-4. The characteristics of shape coding, such as real-time and context based, bring huge burden on computing operation.
    伴随高压缩率和画质音质的高保真度而来的是算法复杂度的提高,作为MPEG-4的关键技术之一,形状编码的实时性和基于上下文的特性所带来的大运算量对现在的计算机结构而言是一个瓶颈。
    Motion estimation is one of key technologies of MPEG-4. Due to spending much time, it affects efficiency of the video coding seriously.
    运动估计与运动补偿技术为 MPEG-4的关键技术之一。 由于运动估计非常耗时,因此对编码的实时性影响很大。
    Extensive experiments show that the implementation not only meets the real time requirement of video coding but also performs better than JPEG-the conventional coding standard, so is a feasible and efficient DSP solution.
    大量实验证明 ,该文的实现结果满足一般视频编码的实时性要求 ,较传统的 JPEG图像编码标准有很大的进步 ,是可行的、高效的 DSP解决方案
    Experimental results show that the proposed algorithm can meet the real-time coding requirement of video images.
    实验结果表明,所提出的水印算法简单、快速,能满足视频编码的实时性要求;
    The experiment results indicate that this method makes coding speed improve about 40 percent of originality algorithm.
    实验表明,与标准算法相比,本文算法处理速度提高大约40%,大大提高了编码实时性。
    This paper presented the MPEG- 4 algorithm opti- mization of embedded surveillance system based on TMS320D- M642 chip, which makes full use of parallel processing charac- teristic of TI C64 series. Some methods of C code, linear assem- bly code optimization were applied in the software optimization of MPEG- 4 encoding, which implement efficient and real time video encoding based on TMS320DM642.
    结合TI公司C64系列DSP芯片指令并行处理的特点,在自主开发的以TMS320DM642为核心的嵌入式MPEG-4视频监控平台上,通过对编码软件进行C语言级、线性汇编级的优化,实现了高效运行的MPEG-4算法,完成了系统对视频编码的实时性要求。
    In order to enhance coding efficiency and reduce the bottle-neck affection of EBCOT for JPEG2000,this paper investigates three optimization schemes for parallel architectures based on researching on EBCOT algorithm. Considering the hardware and software together,the parallel architecture improves the coding speed greatly and strengthens the real-time implementation.
    为了提高JPEG2000编码的效率,降低在此过程中EBCOT的瓶颈效应,文中在分析EBCOT算法的基础上研究了三种并行结构的优化方案,结合软硬件的考虑,并行结构大大提高了编码速度,增强了编码的实时性
 

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