采用SP交织算法、纠错编码,给出了一种基于图像的抗突发误码的大容量数据嵌入隐秘传输方法。
By using SP algorithm and error correction code technology, a combating burst error and large capacity data hiding method for secret transmission was proposed based on images.
分析发现同步变长码的抗误码扩散概率与其码距分布有关。
It is found that the error resiliency of SVLC is related with its code distance distribution.
文章从MPEG - 4的视频压缩原理出发,介绍MPEG - 4中采用的主要压缩方法及抗误码技术。
Based on the principle of MPEG-4 video compression, key compression methods and error resilient technologies used in MPEG-4 are introduced.
实验结果表明,本算法具有很好的抗误码性能,压缩效率比JPEG-LS和JPEG2000略有下降。
The experiment results show that the algorithm has good error feature and the compression efficiency is slightly lower than that of JPEG-LS and JPEG2000.
由于H。 264能覆盖所有低宽带和高宽带的应用,并具有较强的抗误码特性,H。
Because H. 264 can cover all the application of low broadband and high broadband and has the feature of strong strong error resilience.
为降低在窄带高误码率信道上语音传输的失真,针对基音参数提出了一种解码端抗差错算法。
A pitch error resilience scheme was developed to reduce speech distortion through narrow band channels with high bit-error-rates.
水印在嵌入前经过卷积编码和交织处理,以提高其抗误码能力。
The watermark is processed by convolutional encoding and interleaving before embedding, in order to improve the ability for overcoming error bit rate.
针对SPIHT算法抗误码性能差的缺陷,提出一种可以有效提高其抗误码性能的方法。
Because of the SPIHT algorithms bad error-resistance characteristic, an effective scheme is proposed to improve the robustness against communication channel errors.
模拟结果表明新方案压缩比高,在较高的传输误码率情况下,表现出良好的抗误码能力。
Simulation results show that the proposed scheme has higher compression ratio and performs well on channels with high bit error rate(BER).
数据分割作为一种抗误码方法在H . 264标准中得到较大的改进,应用得也很广泛。
Data partitioning, as one of error resilience methods, has been improved in H. 264 and has been widely used.
仿真结果也表明,这种方法能在比特误码率和码长之间取得一个较好的平衡,而且,编码图像能得到很好的抗噪声性能。
The simulation results also show that the method can get better balance between bit error rate and code length, and the image can get better anti-noise property.
为满足在高误码率的窄带信道上进行语音通信的需求,研究了一种适用于甚低速率语音通信的抗误码参数估值算法。
An error resilience scheme for very low bit rate speech coding was developed for speech communications on narrow band channels with high bit error rates.
数值分析结果表明,该方案在单天线RAKE分集基础上进一步增强多径分集效果,能较大地改善误码率性能和提高系统的抗衰落能力。
Results of the performance analysis show this scheme provides more benefit of diversity to overcome fading than the conventional single antenna RAKE receiver, and so gets better BER performance.
利用在理想条件下的概率分布,计算了同步变长码的抗误码扩散概率。
By using the probability distribution in perfect condition, the error resiliency of synchronized variable length codes (SVLC) is counted.
给出了一种基于离散无记忆信源模型的分析变长码抗误码扩散能力。
The analysis of error resiliency of variable length codes (VLC) by Discrete Memoryless Source model is proposed.
数值计算结果显示同步变长码的抗误码扩散概率随其移位对称数的增加而减少。
The numerical calculation results demonstrate that the error resiliency of SVLC decreases with increasing shift symmetry.
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.
与传统的JPEG标准相比,JPEG2000标准采用了离散小波变换、内嵌编码等技术,从而具有了渐进传输、感兴趣区域压缩、抗误码等新特性。
Compared with the JPEG standard, JPEG2000 standard adopts some different compress technique, such as the Discrete Wavelet Transform, Embedded Coding and so on.
此外,新算法还提高了输出码流的抗误码性能和编码器流控的精确程度。
In addition, the new method improves the robustness of video bit stream against channel errors and makes the rate controlling operation of video encoders more accurate.
相对于以往的标准,H . 264标准拥有更高的编码效率,更宽的码率范围,更好的图像质量,更强的网络友好性和抗误码能力。
Compared to earlier standards, The H. 264 standard has a higher coding efficiency, a wider range of bit rate, better image quality, more network-friendly and anti-error capacity.
该方法是在权衡考虑影响视频主观质量多种因素的基础上,并综合了传输、鲁棒性编码和解码端错误隐藏等技术的抗误码方法。
With weighting the factors of video subjective quality, it integrates the technology of transmission, robust coding and error resilience of the decoder.
提出了一种基于量子神经元与量子寄存器的多用户检测方案,计算机仿真结果表明:本文所提出的检测器在误码率和抗“远近”效应方面均具有良好的性能。
A multiuser detector based on quantum neuron and quantum register is proposed. Computer simulation results show that the method has powerful properties both in bit error rate and near-far resistance.
现场应用表明,该子站具有抗扰能力强,测量精度高、通讯误码率低、响应速度快等特点。
Field application reveals the high anti-interference ability, high precision measurement, low error rate communications, and fast response of the sub-station.
目前在H . 264中最新的抗误码方法有参数集、灵活宏次序和冗余片技术。
In H. 264 there are some latest error resilience methods, such as Parameter Set, Flexible Macro-Block Order and Redundancy Slice.
实验结果表明该方案可大大增强分级视频数据的抗误码能力,明显改善视频流媒体的传输质量。
The experiment results show that the proposed scheme can largely improve the error resilience of the scalable video bit stream and the performance of video streaming network transmission system.
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.
因此,为了获得人眼可接受的图像质量,必须采取适合的抗误码措施。
Therefore, proper techniques for error resilience must be applied in order to achieve acceptable quality of restored video.
通过辅以非均衡差错保护策略,采用灵活条带集技术可以增强关注区域的抗误码能力。
It' s a new coding layer added between picture and slice layers, which can be used to encode regions of interest.
通过辅以非均衡差错保护策略,采用灵活条带集技术可以增强关注区域的抗误码能力。
It' s a new coding layer added between picture and slice layers, which can be used to encode regions of interest.
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