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coding-decoding

已有 287 次阅读  2011-12-18 04:38   标签mulberry 

PCM codec software


Ideal impulse function and introduced the aperture distortion; As many infinite interpolation formula and mixed into the high-frequency components and noise; as a result of the decoder sometimes lead to regeneration of the sampling pulse timing jitter distortion. Reflected in the image into a ladder-shaped recovery, but not smooth. So take a low-pass filter to compensate for amplitude and phase,abercrombie brussel, but with less stringent requirements in the case of this process can be omitted (this is also omitted). Function blocks to determine the above, the response properties of each functional block configuration, specific parameters can refer to the above, and finally the selection of simulation parameters, the simulation of the whole mouth click pop-up simulinkparameter Parameter dialog, you can change these options can be seen get different simulation results, I will not repeat them here. 3 simulation results through the filter of the observation window, we get the simulation system waveform shown in Figure 3. Through experiments, we found that PCM codec analog signal recovery compared with the original signal error is smaller,mulberry oslo, with less distortion can be restored, but the waveform is not smooth, and the waveform back postponed / 2. (Due to the smaller image is actually the naked eye could not distinguish the lag in time) the waveform as shown in Figure 3. Figure 3 Waveform comparison chart Fig. 3Comparisonwaveform Volume 24 (4) Wang, et al: PCM codec software 2935 Conclusion In this paper, dynamic simulation toolbox of Matlab Simulink simulation to achieve a PCM codec communication system of the whole process, test literature shows that the software is simple convenient,mulberry tasker, intuitive debugging, simulation software for the communications system provides a convenient tool to achieve,ed hardy vaatteet, in addition,mulberry outlet, this study on the communication system software and hardware-based implementation to provide some help. Ding Yumei, high West-wide. Digital signal processing [M]. Xi'an: Electronic Science and Technology Press. Le-Nan Wu. Data compression [M]. Beijing: Electronic Industry Press. 2000.6. Zhengming Song, Chen Peng. PCM codec software implementation [J]. Modern communications technology 2002.2.2000,mulberry norge, (1) :24-35RealizationofPCMCoding-decodingSystemwithSoftwareWANG (ElectronicsandInformationcollegeAn-hong, SUNZhi · yi, LIZhi-hongofTaiyuanUniversityofScienceandTechnology, Taiyuan,ugg outlet, 030024) Abstract: Pulse-code-modulation (PCM) isacodingsystemwiththemostsimpleconceptionandmostperfecttheory. Andalso, itiscodingsystemwhichhaeensuccessfullydeveloped,mulberry, widelyused. Usingsoftwaretore-alizesomefunctionsofthePCMcoding-decodingchipandcombiningsoftwarewithchiptoaccomplishthecoding-decodingfunctioninthewholedesigningwillnotonlymakethewholesystemdesigningsimpleandflexible, butal-SOhelpUStoachieveanindescribableperfectresult. Inthispaper, themethodandprocessofrealizingPCMcoder-decoderbyMatlabgSimulinktoolboxaredescribed. Thismethodhassomeadvantages,abercrombie dublin, f0rexample, itissimpleandimmediate. Keywords: pulse-code-modulation (PCM), coding-decoding,mulberry outlet, softwarerealization test ...
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