本文正是在这样的背景下，研究开发了基于网络带宽测量技术的多码率流媒体系统。
If we can get network bandwidth information in detail and tune encoding and streaming method, the whole stream media system will be improved.
介绍了相应的关键帧技术和动态多码率技术，以及在终端上实现无线流媒体业务的整个流程。
This article introduces related key-frame and dynamic multi-code-rate technologies and shows the whole procedure to implement wireless streaming media service.
介绍了自适应多码率语音编解码算法及其基于TMS320F 2812定点DSP芯片的实现方案。
An Implementation of the adaptive multi-rate speech codec based on the TMS320F2812 fixed-point DSP chip is presented.
本文采用了一种可生成多码率码的特殊的删余卷积码——RCPC码作为信道编码技术，以实现不等差错保护机制（UEP）。
Unequal error method is done. Rate compatible punctured convolutional code—RCPC is adopted as the channel coding to carry out the UEP.
这对于在移动数字通信中，改善由多径效应引起的误码率增高而严重影响通信的传输质量，具有非常重要的指导作用。
It is an important action to improve the propagation quality of communication suffered from rising the BER on multipath propagation in digital mobile radio communication.
采用矩空间理论和高斯近似法分别得出该系统在多址干扰和白高斯噪声条件下的平均误码率表达式。
Based on moment space theory and Gaussian approximation method, expressions of average error probability for system with multiple-access interference and white Gaussian noise environment are derived.
本文通过概率分析，着重对这种系统的多址干扰、自干扰特性进行了研究并给出了误码率的数值结果。
By statistical analyzing, the characters of the MAI and self-interference are studied and the numerical results of the error bit rate are given.
由于水声信道的多途效应造成水声通讯质量大大下降，误码率很高。
In underwater communications, multi-path effect leads to the reduction of communication quality and the high error code rate.
通过研究几种发射脉冲的一次反射和二次反射的接收波形以及它们的误码率特性，研究了信道多径失真对室内无线光通信的影响。
The paper researches the received waveform and the characteristic of BER in one refection and twice refection, studies the influence of multipath distortion on the transmitted pulse.
该文提出了一种在有限反馈条件下多入单出—正交频分复用(MISO - OFDM)系统中基于误码率的波束成形方案。
In this paper, a new transmit beamforming scheme with limited feedback is presented in Multiple-Input Single-Output Orthogonal Frequency Division Multiplexing (MISO-OFDM) systems.
文中对新构建系统的误码率性能进行了分析，仿真结果表明，该系统具有理想的误码率性能，抗多址干扰能力强，具有非常广阔的应用前景。
Simulation results show that the system has the ideal bit error rate performance and the high capability of multi-access interference, thus having a broad application future.
在多径衰落信道中，本文分析了导引辅助的二维扩频相干解调的误码率性能。
In this paper, we analyze the BER performance of pilot symbol assisted two-dimensional spread spectrum systems with coherent demodulation in multi-path fading channels.
文中介绍了几种常用的多通道压缩音频编码方式的原理，并比较了它们的异同、压缩码率以及实际中的应用。
This paper introduces some kinds of audio coding method, gives the comparison among them, and shows their applications.
实验证明，在低码率序列图像传输中，此多参考帧搜索算法在匹配精度和运算速度方面都有一定的优越性。
Experiments show that at low bit-rate of image sequence transmission, thus multi-reference frame search algorithm has some advantages in matching accuracy and speed of operation.
经过理论分析和IEEECM 3多径信道仿真，结果表明该接收机的误码率性能优于一般A TR接收机。
This receiver is analyzed in theory and simulated in IEEE CM3 multipath channel. The results show that it has a better bit-error-ratio performance compared with a conventional ATR receiver.
多进多出（MIMO）系统在发射端和接收端分别设置多副发射天线和接收天线，采用MIMO技术可以提高信道容量和信道可靠性，降低误码率。
In MIMO system, multiple antennas are used separately at the transmit and the receive ends. MIMO technique is used to improve channel capacity and link reliability as well as to reduce bit error rate.
本文证明了对IIR信道输出进行过采样(采样率是输入码率的整数倍)可以转化成单输入多输出的多信道模型，并且不同的信道有相同的AR系数。
In this paper, we prove that oversampling the output of IIR channels can be transformed into a single input multiple output (SIMO) model, and the subchannels have the same AR coefficients.
海上实验结果表明：在传输距离为12公里时，系统的误码率为10 - 2至10 - 3，具有较强的抗多途和起伏干扰能力。
The field experimental results show: the system provides the performances of anti-interference of multipath and fluctuation, with the bit error rates on the order of 10-2 to 10-3 at distance 12km.
海上实验结果表明：在传输距离为12公里时，系统的误码率为10 - 2至10 - 3，具有较强的抗多途和起伏干扰能力。
The field experimental results show: the system provides the performances of anti-interference of multipath and fluctuation, with the bit error rates on the order of 10-2 to 10-3 at distance 12km.
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