失真度

采用自适应小波变换编码压缩方法对心电信号进行压缩，结果表明利用该压缩方法得到了较好的压缩比，并且重构的信号失真度较小。

The auto-adapted wavelet transformation code compression method is analyzed to handle the electrocardiogram signal . The result indicates that using the algorithm can acquire the good compression ratio and small degree of distortion of the restructured signal .

主要讨论失真度计算、波形的存储与回放，最后给出了实验结果及分析。

Mainly discusses calculation of degree of distortion , then how to implement the storage and reproduce . At last the experiment results and analysis are provided .

基于PC声卡的网络非线性失真度测试方法

Testing Method of Nonlinear Distortion Degree of Network Based on PC Audio Card

采用FFT的超低频失真度测量

Distortion Measurement of Ultra Low Frequency Signal by Means of FFT Algorithm

移相式谐波失真度测量基于FFT的低频谐波失真度测试仪

Phase & shift harmonic distortion measurement The design of instrument of distortion measuring

ICA算法在工频失真度谐波分析应用中的研究

Study on ICA Algorithm to Harmonic Analysis on Frequency Distortion

从逆变环节的实验结果来看，产生的SPWM波稳定、可靠，输出电压波形失真度小，电压波动率仅在2%左右。

Base on the result , the SPWM wave is static and reliable .

应用于某原子力显微镜的标定软件中，使扫描图像的xy表面失真度从7.2%降至2.44%。

The experiment of calibration of an atom force microscope ( AFM ) shows that x-y plane distortion degree decrease from 7.2 % to 2.44 % .

并在实验样机上作了对比实验，结果表明基于PID控制和重复控制的复合控制策略具有优良的控制效果，对各种负载输出电压谐波失真度满足规定要求。

It can be seen from the experiment that the compound control strategy based on PID and repetitive control performs good dynamic and static performances .

方波型逆变器总谐波失真度（THD）与其负载Q值的关系

Relations between total harmonic distortion ( THD ) and load quality ( Q ) in square wave VSIs

分析了这种电压源逆变器的主要参数，如总谐波失真度（THD）和失真指数（DF）。

The major parameters such as THD and DF of this VSI are analyzed .

应用DA转换器拟合波形时，波形的失真度主要取决于DA转换器字宽和数据输出速率。

When producing the signal by DAC , the Total Harmonious Distortion of signal is decided by the bit width and the converting speed of D / A converter .

基于PC104的失真度测量仪设计与实现

Design and Realization of Signal Distortion Measurement Instrument Based on PC 104

分析了多媒体无线传输模型，并讨论其中的信源编码失真度DS、信道传输失真度DC、系统总体失真度D及其相互的关系。

The model for the wireless multimedia transmission was analyzed ; the relationship among source coding distortion Ds , the channel distortion Dc , and the rate distortion of the transmission system D were discussed ;

基于PFGS的无线信道失真度的研究

Research on the Wireless Channel Distortion Based on Progressive Fine Granularity Scalability Coding

CPLD、数据存贮器共享、双总线控制等技术，使硬件系统结构简单，信号拟合点数多，波形平滑、失真度小。

Based on the technology of CPLD , common memory and bi-bus control , the signal source has the characteristics of simple hardware , more signal smooth signal and low distortion , etc.

编码器通过直接计算出编码一帧图像可以得到的最小量化失真度，评估MB帧内更新所增加的总量化失真度和减小的扩散失真度，决定是否需要对此MB进行帧内更新。

By comparing the increased quantization distortion and reduced propagation distortion of one frame approximately , the encoder can quickly determine whether it is necessary to INTRA-update a MB .

飞机AMU自动测试系统测试信号失真度检测研究

AIRCRAFT MAINTENANCE Research on Distortion Measurement Method in Automatic Test System of Audio Management Unit

利用DSP高速处理系统，按照系统的不同组态实现了调频广播发射机频偏、频响、失真度、信噪比等11项运行技术指标的自动测试。

Using high speed DSP processing system , it realizes automatic testing of eleven running technology indexes according to different configuration of system , such as the frequency response of broadcast transmitter , distortion degree , SNR , and so on .

为了统计综合优化中人脸ROI所造成的总失真度，本框架提出了一种基于前向运动搜索的人脸ROI时域扩散替代链的构造方法。

To obtain the total distortion of a certain human face ROI in comprehensive optimization , we constructed a human face ROI temporal propagation alternative chain based on forward motion search .

分析了传统AWG的不足，研究了D/A转换器字宽和数据输出速率对信号失真度的影响，介绍了直接数字频率合成（DDS）的基本原理。

The weaknesses of traditional arbitrary waveform generator ( AWG ) were analyzed and the effect of D / A converter 's bit width and output rate on signal distortion was studied .

对于方波型逆变器，总谐波失真度（THD）不仅仅随占空比变化，而且受负载类型的影响。

In square wave voltage source inverter , total harmonic distortion ( THD ) is not only the function of duty cycle , but also with response to load 's type .

介绍了基于PC104的失真度测量仪的数字化测量原理、硬件设计方案和软件流程。

The digitized measurement principle , hardware scheme and software flowchart of PC 104-based distortion measurement instrument are introduced in this paper .

数字信号发生器模块基于直接数字频率合成技术（DDS），采用单片机和高精度D/A转换器完成，具有信号频率分辨率高、稳定性好、失真度小等特点。

The digital signal generator is constitutive of Single-Chip Microcomputer and accurate digital-to-analog converter and is based on the DDS technology . It has the characteristic of high frequency discriminability , good frequency stability and low distortion .

正弦脉宽调制（SPWM）和空间矢量脉宽调制（SVPWM）由于具有总谐波失真度（THD）小、开关频率恒定、实现方便等优点而在传统逆变器中得到了最为广泛的应用。

Sinusoidal pulse width modulation ( SPWM ) and space vector pulse width modulation ( SVPWM ) techniques are widely used in traditional inverters for low THD , constant switching frequency , convenient realizations etc.

同时采用一个低通滤波器估算当前帧的目标失真度，并结合GOP剩余编码比特和缓冲区状态得到当前帧的目标比特数。

Then a low-pass filter is used to estimate the target frame distortion . The frame bit allocation is determined by target distortion , remaining coding bits and buffer status .

如果将contourlet变换直接应用于图像压缩，在一定的失真度下，编码比特率很可能会增加。

If it is applied to image compression straightforwardly , the encoding bit-rate may increase to meet a given distortion .

在有限反馈条件下，借鉴Lloyd矢量编码算法的设计思想，以弦距离作为失真度判断准则，给出了一种基于Lloyd的信道码本生成算法。

Under the condition of limited feedback , the paper gives a channel codebook generation algorithm based on Lloyd , which exploits Lloyd vector coding principle that sets chordal distance as the criteria of distortion judgment .

针对数据采集卡和曲线拟合引入的不确定度难于分析求解的问题，基于失真度测量的误差修正公式和Parseval定理，重点研究了曲线拟合法失真度测量结果的不确定度分析方法。

Based on the error-correcting formula and Parseval theorem , uncertainty analysis method of the results emerged . from curve-fit method is studied as a key issue .

测试信号电平范围为±5V，基波频率上限100kHz，精度可达失真度的2.5%。

The level range of input signal is ± 5 volts . The highest frequency of basic wave is less than 100 kHz . The accuracy of system approaches 2.5 % .