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A low-complexity MP3 decoder based on Broadcom embedded platform was proposed.C-code level optimization algorithms on inverse quantization,stereo decoding and alias reduction based on PC were proposed to further reduce the amount of memory usage and the computational complexity.Furthermore,the executable file of the optimized MP3 decoder was generated under the Linux environment,and transplanted to the set-top box based on Broadcom embedded platform.Experiment results showed that the total time for decoding was reduced on the embedded platform,and the goal of real time and fluent playing of audio files was fulfilled,which demonstrated the effectiveness of the proposed MP3 decoder.The proposed MP3 decoder could be applied in fields such as the set-top box based on Broadcom embedded platform and other portable devices. 相似文献
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本文用信号流国和矩阵方法分析了测量激彼晶体管S参数的三种方法,分别给出了10个和8个误差参数信号流图新的显式解。为各种型号的矢量网络分析仪测量做液晶体管S参数,提供了精确测试方法。 相似文献
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本文分析了H.264 软件编码器的结构,提出了影响速度的瓶颈,并给出其中两方面的优化方案: 改进的块匹配算法和1 / 4 象素参考帧插值函数结构的优化。同时,针对高性能D S P 芯片 TMS320C64xx的特点提出了一系列的优化方案,最后讨论了C 语言程序在DSP 硬件上优化设计的 一般性规则。 相似文献
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A new method of artificial intelligence based on a new improved back propagation neural network (BPNN) algorithm is partially applied in the problem of image restoration. In order to overcome the inherited issues in conventional back propagation algorithm i.e. slow convergence rate, longer training time, hard to achieve global minima etc., different methods have been used including the introduction of dynamic learning rate and dynamic momentum coefficient etc. With the passage of time different techniques has been used to improve the dynamicity of these coefficients. The method applied in this paper improves the effect of learning coefficient η by using a new way to modify the value dynamically during learning process. The experimental results show that this helps in improving the efficiency overall both in visual effect and quality analysis. 相似文献
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目的研究图像分割的最佳阈值.方法一种基于灰度图像直方图嫡和遗传算法的自适应图像分割算法.结果在此研究中,分割问题被定义为一个优化问题,由于遗传算法能够有效地搜索分割参数空间,则以遗传算法的适应值作为质量标准.结论此方法可用于最佳阈值分割. 相似文献
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