Rong Cheng's Blog

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Line echo cancellation (LEC) algorithm implementation has been finished! 2005-10-24, by Rong Cheng Line echo cancellation (LEC) algorithm implementation has been finished! I have accomplished the float-point implementation of LEC in VC++ and simply implemented the algorithm in MATLAB. The result of algorithm implementation is accepted. Next, I will consider how to design an efficient doule-talk detection (DTD) agorithm for my LEC algorithm to improve performance. 分类: DSP_Algorithms | 阅读全文 | 评论(0) | 引用(0) Daily Digest 2005-10-08, by Rong Cheng NuukiaWorld project: Mobile phone - standard audio amplifier adapter http://www.panuworld.net/nuukiaworld/hardware/hifiset/index.htm A headset is useful device when you are outdoors. At home you may prefer speaking directly to the phone. But you can connect the phone to your hi-fi amplifier at home and play music on the line, record the calls, and use it as a "wireless microphone". I think that, if the adapter integrates an adaptive AGC algorithm to get a conformable vocie quality , it may be a good idear for call recording. ZigBee and IEEE 802.15.4 Resource Center 7th International Conference on Fixed Point Theory and its Applications 分类: Wireless DSP_Algorithms | 阅读全文 | 评论(0) | 引用(0) Next Week's Plan 2005-10-05, by Rong Cheng Next Week's Plan : Line echo cancellation (LEC) algorithm implementation The work will be finished in three phases. First, master and study the algorithm of line echo cancellation and simply implement the algorithm in MATLAB. Secondly, accomplish the float-point implementation of LEC in VC++. Thirdly, convert my float-point algorithm to fixed-point algorithm in order to run in a fixed-point DSP. 分类: DSP_Algorithms | 阅读全文 | 评论(0) | 引用(0) 音频AGC 16 bit 定点实现已经完成 2005-10-04, by Rong Cheng 终于完成了音频AGC 浮点代码向16 bit 定点代码的转换,效果和自己先前编的浮点程序一样. 第一次编写定点程序,真是麻烦,闷头花了几天才调试成功. 呵呵, 晚上睡觉脑子不是左移和右移, 就是溢出啊. I have successfully accomplished a 16 bit fixed point c implementation of audio automatic gain control (AGC ) algorithm. The effect of fixed point implementation is the same as float point implementation.That's really a perplexing work for me first time to design a fixed point algorithm. Because I need to design a specific fixed point algorithm for my complex float point AGC code. It took me three days to convert.the float point code to fixed point code. Now, the fixed point AGC code can directly be migrated to a fixed-point DSP. 分类: DSP_Algorithms | 阅读全文 | 评论(0) | 引用(0) MATLAB下的音频AGC实现(原创) 2005-09-07, by Rong Cheng 已实现了MATLAB下的音频AGC，效果还可以，做起来才发觉比较简单，关键是要有高效的算法。如果能在实现AGC的同时做到噪音消除和回音消除，则效果更佳。 分类: DSP_Algorithms Matlab | 阅读全文 | 评论(2) | 引用(0) 分页: