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2013 Ninth International Conference on Intelligent Information Hiding and Multimedia Signal Processing最新文献

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Slant Discriminant Analysis for Image Feature Extraction 图像特征提取的倾斜判别分析
Li-Yan Zhao, Dong Zou, Guanghong Gao
In this paper, a novel feature extraction algorithm,called Slant discriminant analysis (SDA), is proposed. SDA aims to use the relation of rows and columns of image samples to extract the directional feature of the image samples. The proposed algorithm is applied to image classification on Yale face Database.The experimental results demonstrate the effectiveness of the proposed algorithm.
本文提出了一种新的特征提取算法——倾斜判别分析(SDA)。SDA的目的是利用图像样本的行与列之间的关系来提取图像样本的方向性特征。将该算法应用于耶鲁人脸数据库的图像分类中。实验结果证明了该算法的有效性。
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引用次数: 1
A New Model-Based Prosody Coder for Mandarin Speech 一种基于模型的汉语语音韵律编码器
Chen-Yu Chiang, Yu-Ping Hung, Sin-Horng Chen, Yih-Ru Wang
In this paper, a novel parametric prosody coding approach for Mandarin speech is proposed. It employs a hierarchical prosodic model (HPM) as a prosody generating model in the encoder to analyze the speech prosody of the input utterance to obtain a parametric representation of four prosodic-acoustic features of syllable pitch contour, syllable duration, syllable energy level, and syllable-juncture pause duration for encoding. In the decoder, the four prosodic-acoustic features are reconstructed by a synthesis operation using the decoded HPM parameters. The reconstructed prosodic features are lastly used in an HMM-based speech synthesizer to help to generate the reconstructed speech. Experimental results show that the reconstructed speech has good quality at low data rates of 114.9 bits/s for a speaker-dependent task. An informal listening test confirmed decoded speeches sounded very fluently.
本文提出了一种新的汉语语音参数韵律编码方法。该算法在编码器中采用层次韵律模型(HPM)作为韵律生成模型,对输入话语的语音韵律进行分析,得到音节音高轮廓、音节时长、音节能级、音节接点停顿时长四个韵律声学特征的参数化表示进行编码。在解码器中,使用解码后的HPM参数进行合成操作,重建四个韵律声学特征。最后将重构的韵律特征用于基于hmm的语音合成器中,以帮助生成重构语音。实验结果表明,在114.9比特/秒的低数据速率下,重构语音具有良好的语音质量。一项非正式的听力测试证实,解码后的演讲听起来非常流利。
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引用次数: 0
Design and Application of the Feedback and Tracking System for Nuclear Power Unit Maintenance Technical Issues 核电机组维修技术问题反馈跟踪系统的设计与应用
Jiangli Qu, X. Liu
With the cold and hot functional test and core load of the nuclear power unit to come, operating staff will hold an overall commissioning test on the equipments. In order to track, solve and approve the technical issues in a better way, professionals are required to assign those issues in accordance to the work procedure, and share the execution and accomplishment condition of the work in time. Therefore, it is necessary to develop a feedback and tracking system to manage technical issues focusing on the equipment maintenance, which will help follow up the process by series of codes and symbols. It can also provide a knowledge base for issues arising from nuclear unit maintenance activities to guarantee good operation of the plant.
随着核电机组冷热功能试验和堆芯负荷的到来,运行人员将对设备进行全面调试试验。为了更好地对技术问题进行跟踪、解决和审批,需要专业人员按照工作流程对技术问题进行分配,并及时分享工作的执行情况和完成情况。因此,有必要建立一个以设备维修为中心的技术问题的反馈和跟踪系统,通过一系列的代码和符号来跟踪过程。它还可以为核机组维修活动中出现的问题提供知识库,以保证电厂的良好运行。
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引用次数: 0
Hybrid Reverberator Using Multiple Impulse Responses for Audio Rendering Improvement 混合混响器使用多个脉冲响应音频渲染改进
A. Primavera, S. Cecchi, F. Piazza, Junfeng Li, Yonghong Yan
In the recent years, hybrid reverberation algorithms have been widely explored aiming to reproduce the acoustic behavior of real environment at low computational load. On this basis, exploiting the advantages introduced from hybrid reverberation structures, a novel approach for the reproduction of moving listener position through impulse responses (IR) interpolation has been presented in this paper. In particular, the presented methodology allows to remove redundant information in large IR database also decreasing the memory usage and the computational complexity required to perform the auralization operation. The effectiveness of the proposed approach has been proved taking into account a real IR database and also providing comparison with the existing state-of-art techniques in terms of objective and subjective measures.
近年来,混合混响算法得到了广泛的研究,其目的是在低计算负荷下再现真实环境的声学行为。在此基础上,利用混合混响结构的优点,提出了一种利用脉冲响应插值再现听者移动位置的新方法。特别地,所提出的方法允许在大型红外数据库中删除冗余信息,也减少了内存使用和执行可视化操作所需的计算复杂性。考虑到一个真实的红外数据库,并在客观和主观度量方面与现有最先进的技术进行比较,证明了拟议方法的有效性。
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引用次数: 2
Recaptured Image Detection Based on Texture Features 基于纹理特征的重捕获图像检测
Xiaobo Zhai, R. Ni, Yao Zhao
With the development of digital image processing technology, image capture and image tampering are easy to obtain with the help of portable devices and software tools. Subsequently, digital image forensics has become increasingly important, in which recaptured image detection is one branch. In this paper, a set of features based on image texture are used to identify the recaptured images. Because the recapture process generally accompanies with some image quality losses, which can be reflected from the texture features, we study the effectiveness of LBPV and the proposed Relative-Contrast. Then, these two kinds of features are combined to make a distinction between real-scene images and the corresponding recaptured ones. With a support vector machine classifier, the experimental results show that the proposed features perform well.
随着数字图像处理技术的发展,在便携式设备和软件工具的帮助下,图像捕获和图像篡改很容易实现。因此,数字图像取证变得越来越重要,而图像检测是其中的一个分支。本文采用一组基于图像纹理的特征来识别再现图像。由于再捕获过程通常伴随着一些图像质量损失,这些损失可以从纹理特征中反映出来,因此我们研究了LBPV和所提出的相对对比度的有效性。然后,将这两种特征结合起来,对真实场景图像和相应的再现图像进行区分。在支持向量机分类器上,实验结果表明所提出的特征表现良好。
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引用次数: 12
A Computation Efficiency AND-CFAR for FMCW Radar Receiver FMCW雷达接收机的计算效率与cfar
Ho-En Liao, Guan-Yu Lin, M. Sheu, S. Siao, Sin-Siang Wan
The paper proposes a computation efficient constant false alarm rate (CFAR) algorithm, AND-CFAR, for frequency modulated continuous-wave (FMCW) radar receiver. The criterion of AND-CFAR algorithm adopts criteria combing Cell-Averaging (CA) and Order Statistics (OS) CFAR algorithms with 'AND' operation, and the frequency estimation is thus improved. While considering application in embedded systems, it is necessary to lower computation complexity of AND-CFAR algorithm. Therefore, a computation efficiency AND-CFAR algorithm is proposed to reduce the computation effort in CA and OS CFAR algorithms. Base band processing of FMCW receiver, which is composed of a band pass filter (BPF), a FFT and a AND-CFAR, is simulated to show the validity of the algorithm proposed. And, then, the base band FMCW receiver is implemented in two DSP chips to show the saving in execution periods with AND-CFAR algorithm proposed.
针对调频连续波(FMCW)雷达接收机,提出了一种计算效率高的恒虚警率(CFAR)算法AND-CFAR。and -CFAR算法的判据采用与运算结合Cell-Averaging (CA)和Order Statistics (OS) CFAR算法的判据,改进了频率估计。考虑到在嵌入式系统中的应用,有必要降低AND-CFAR算法的计算复杂度。因此,为了减少CA和OS CFAR算法中的计算量,提出了一种计算效率与CFAR算法。通过对由带通滤波器(BPF)、FFT和and - cfar组成的FMCW接收机基带处理的仿真,验证了该算法的有效性。然后,在两个DSP芯片上实现了基带FMCW接收机,以显示使用And - cfar算法可以节省执行周期。
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引用次数: 3
Multiview Video Coding Algorithm Based on HBP Prediction Structure 基于HBP预测结构的多视点视频编码算法
Yuxin Song, Ke-bin Jia
To reduce the heavy computational complexity of uni-directional and bi-directional predictions in multiview video coding (MVC), this paper proposes a multiview video coding algorithm. Uni-directional prediction is optimized. By using the geometry relationship between disparity and motion vectors, an iterative process is preformed. In each process, a new adaptive search range is used to revise motion/disparity vector. At last, optimal motion and disparity vectors are achieved. For bi-directional prediction, TZSearch algorithm is utilized to accelerate prediction. Furthermore, an early termination strategy is devised on the basis of relationships among bi-directional prediction, model error, quantization parameter and temporal level. Experimental results show that computational complexity can be significantly reduced while maintaining video coding performance compared with JMVC full search algorithm.
为了降低多视点视频编码(MVC)中单向和双向预测的计算复杂度,提出了一种多视点视频编码算法。优化了单向预测。利用视差与运动矢量之间的几何关系,进行迭代求解。在每个过程中,使用一个新的自适应搜索范围来修正运动/视差矢量。最后得到最优的运动矢量和视差矢量。对于双向预测,采用TZSearch算法加速预测。在此基础上,根据双向预测、模型误差、量化参数和时间水平之间的关系,设计了一种早期终止策略。实验结果表明,与JMVC全搜索算法相比,该算法在保持视频编码性能的同时显著降低了计算复杂度。
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引用次数: 1
Admissible Range for Individualization of Head-Related Transfer Function in Median Plane 中位面头部相关传递函数个体化的允许范围
M. Akagi, Hideki Hisatsune
Individualization of the head-related transfer function (HRTF) to each listener is important for the listener to localize sound sources accurately. If an inappropriate HRTF is used, the sound localization is incorrect and there is a lower sense of presence. We investigate the admissible ranges for individualization of P1, N1, and N2 frequencies, which are spectral cues of HRTFs to localize sounds, in particular, on the median plane. The admissible ranges for individualization are the valid ranges of the spectral cues on the HRTFs at which each listener can localize presented sounds. We did listening tests to estimate the admissible ranges of P1, N1 and N2. The results suggest that N1 should be accurate, the admissible range is narrow, P1 and N2 are not strict, and also that strict tuning of P1 and N2 is not required. When applying a reconstructed HRTF for a certain listener selected from those of others in the database based on the condition that the N1, N2, and P1 of those HRTFs are limited to the admissible ranges, accuracy of sound localization approaches that applying the most appropriate HRTF for the listener.
对每个听者的头部相关传递函数(HRTF)的个性化对于听者准确定位声源非常重要。如果使用不合适的HRTF,声音定位不正确,存在感较低。我们研究了P1, N1和N2频率个性化的可接受范围,这些频率是hrtf的频谱线索,用于定位声音,特别是在中位数平面上。个性化的可接受范围是hrtf上的频谱线索的有效范围,在这个范围内每个听者都可以定位所呈现的声音。我们做了听力测试来估计P1, N1和N2的可接受范围。结果表明,N1应准确,允许范围较窄,P1和N2不严格,也不需要严格调整P1和N2。当根据HRTF的N1、N2和P1限制在可接受范围内的条件,对数据库中选择的某个听者应用重构的HRTF时,声音定位的精度方法是为听者应用最合适的HRTF。
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引用次数: 4
Adaptive Multi-thresholding Image Denoising Method 自适应多阈值图像去噪方法
Ling-Zhen Song, Li Zhang
In this paper, a new adaptive multi-thretholding image denoising method based on the decomposition order is presented, which is built upon the ideas of Embedded Zero tree Wavelet (EZW) encoder and separate character of signals and noises. This method is not increase in operation amounts but excellent in image denoising results.
本文基于嵌入式零树小波编码器的思想和信号与噪声分离的特点,提出了一种基于分解顺序的自适应多阈值图像去噪方法。该方法不增加运算量,但图像去噪效果良好。
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引用次数: 0
A Wavelet-Based Image Watermarking Scheme for Stereoscopic Video Frames 基于小波的立体视频帧图像水印方案
Yueh-Hong Chen, Hsiang-Cheh Huang
In this paper, we propose a digital watermarking method for stereoscopic video frames. A stereoscopic video frame is stored as two images and combined by software while displayed. These two stored images are with high similarity. On the other hand, a pirate can only clip half of a frame to remove watermarks. In the circumstances, it should be taken into consideration to resist collusion attacks and clip attacks while developing a watermarking scheme for stereoscopic videos. Thus, the proposed watermarking method embed two watermarks into the two images of a stereoscopic video frame, respectively. To resist collusion attacks, the proposed scheme identify similar portions of the two images containing in a stereoscopic video frame. Then, identical modification will be applied on the same positions of the similar portions. As shown in experimental results, test images with watermarks embedded are still have high quality. Although two watermarks may overlap with each other after the proposed scheme, they still have high embedding effectiveness. Moreover, watermark embedding method adopted in the proposed watermarking scheme has been well-studied. It has been indicated that the embedded watermarks are still detectable after common image processing operations. Thus, the proposed scheme is suitable for copyright protection of stereoscopic videos.
本文提出了一种立体视频帧的数字水印方法。一个立体视频帧被存储为两个图像,并在显示时由软件组合。这两个存储的图像具有很高的相似性。另一方面,盗版者只能截取半帧来去除水印。在这种情况下,在开发立体视频水印方案时要考虑到抗串通攻击和抗剪辑攻击。因此,所提出的水印方法将两个水印分别嵌入到一个立体视频帧的两个图像中。为了抵抗合谋攻击,提出的方案识别立体视频帧中包含的两幅图像的相似部分。然后,对相似部分的相同位置进行相同的修改。实验结果表明,嵌入了水印的测试图像仍然具有较高的质量。该方案虽然存在两个水印重叠的情况,但仍然具有较高的嵌入效率。此外,所提出的水印方案所采用的水印嵌入方法也得到了很好的研究。结果表明,经过一般的图像处理后,嵌入的水印仍然是可检测的。因此,该方案适用于立体视频的版权保护。
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引用次数: 7
期刊
2013 Ninth International Conference on Intelligent Information Hiding and Multimedia Signal Processing
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