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2007 International Symposium on Intelligent Signal Processing and Communication Systems最新文献

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An improved method for Scalable Video Coding at low bit rates 一种改进的低比特率可扩展视频编码方法
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4446025
Ye Jianhong, Liu Jilin
{"title":"An improved method for Scalable Video Coding at low bit rates","authors":"Ye Jianhong, Liu Jilin","doi":"10.1109/ISPACS.2007.4446025","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4446025","url":null,"abstract":"Scalable video coding (SVC) now is becoming one extension part of the H.264/AVC standard. The bandwidth of video transmission systems is different, and the terminal units of video communication are diverse, so the SVC will be more popular because of its scalability in coding different picture size, frame rate and bit rate. However, the flexibility of SVC can't solve the conflict between the bit rate and the video quality, especially in the very low bit rate condition. In this paper, we describe a new approach to deal with this problem. We downsample the layer with high resolution, and then code the different layers with SVC. Finally, we upsample the high layer data in the decoder. Experiments show that this method can achieve better subjective quality in the low bit rate condition.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"10 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116673044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Fast motion estimation algorithm based on edge block detection and motion vector information 基于边缘块检测和运动矢量信息的快速运动估计算法
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445956
Qin Liu, Zhenxing Chen, S. Goto, T. Ikenaga
{"title":"Fast motion estimation algorithm based on edge block detection and motion vector information","authors":"Qin Liu, Zhenxing Chen, S. Goto, T. Ikenaga","doi":"10.1109/ISPACS.2007.4445956","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445956","url":null,"abstract":"Compared with previous standards, H.264/AVC adopts variable block size motion estimation (VBSME) and multiple reference frames (MRF) to improve the video quality. So full search motion estimation algorithm (FS) has to consume massive computation, to calculate every search point in the search window for every block type with multiple reference frame. Some mathematical analyses on edge block are presented in this paper. Moreover in most cases, search range for FS is fixed and large, which is not necessary for most cases. An adaptive search range scheme is provided in this paper. In summary, two fast VBSME algorithms are proposed in this paper: 1) subsampling method based on the block edge information is applied 2) adaptive search range based on motion vector information is utilized. Experiments demonstrate that combing our proposed algorithms with UMHS almost saves 92%- 98% integer motion estimation (IME) time compared with exhaustive search with only less than 0.5% bitrate increase or 0.04 db PSNR decline.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121783800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Blind channel tracking in cooperative MIMO 协同MIMO中的盲信道跟踪
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445948
Zhen-ya Yan, B. Zheng, Jingwu Cui
{"title":"Blind channel tracking in cooperative MIMO","authors":"Zhen-ya Yan, B. Zheng, Jingwu Cui","doi":"10.1109/ISPACS.2007.4445948","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445948","url":null,"abstract":"Application of sequential quasi Monte Carlo (SQMC) to blind channel tracking in cooperative Multiple-input multiple-output (MIMO) system is proposed in this paper, which doesn't need to transmit training symbol and can save power and wireless bandwidth. Additionally, an improved version of SQMC algorithm by taking advantage of current received signal is proposed. As will be shown through simulations, SQMC method reaches better performance than Sequential Monte Carlo (SMC) methods, and incorporation of current received signal improves performance of SQMC obviously.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125858240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel spatial information recovery algorithm based on fuzzy clustering in H.264 H.264中基于模糊聚类的空间信息恢复算法
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445837
H. Shen, X. Zhu
{"title":"A novel spatial information recovery algorithm based on fuzzy clustering in H.264","authors":"H. Shen, X. Zhu","doi":"10.1109/ISPACS.2007.4445837","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445837","url":null,"abstract":"As no reference frame can be obtained in Intra-frame error concealment, reducing the degradation of spatial reconstructed image is one of the key techniques in error concealment. In this paper, a novel spatial error concealment algorithm based on fuzzy clustering for Intra-frame in H.264 is proposed. This proposed algorithm gives a new selection of eigenvectors and similarity measurement for fuzzy clustering. The experimental results show that the proposed algorithm can improve the edge details, achieve a better subjective quality of the recovered image and increase PSNR (Peak Signal-to-Noise Ratio) as well.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121728103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Direction of arrival estimation for GPS signal via Toeplitz approximating the cross-correlation matrix 利用Toeplitz逼近互相关矩阵估计GPS信号的到达方向
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445831
Zhigang Su, D. Lu, Yingning Peng, Ping Li, R. Wu
{"title":"Direction of arrival estimation for GPS signal via Toeplitz approximating the cross-correlation matrix","authors":"Zhigang Su, D. Lu, Yingning Peng, Ping Li, R. Wu","doi":"10.1109/ISPACS.2007.4445831","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445831","url":null,"abstract":"In Global Positioning System (GPS), adaptive beamforming is an effective method for enhancing the desired signal and suppressing interferences simultaneously. The direction-of- arrival (DOA) of the desired signal, however, as a priori information, is required. Due to very lower signal-to-noise ratio for GPS signal, the DOA estimation is a challenge problem. In this paper, a preprocess is presented which Toeplitz approximates the cross-correlation (CC) matrix. The matrix Toeplitz approximation recovers the Toeplitz structure, and the approximated matrix is used to obtain more accuracy estimates via MUSIC method.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121750653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Voice conversion using Viterbi algorithm based on Gaussian mixture model 基于高斯混合模型的语音转换Viterbi算法
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445816
Zhi-Hua Jian, Yang Zhen
{"title":"Voice conversion using Viterbi algorithm based on Gaussian mixture model","authors":"Zhi-Hua Jian, Yang Zhen","doi":"10.1109/ISPACS.2007.4445816","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445816","url":null,"abstract":"A novel method for voice conversion based on Viterbi algorithm is proposed in this paper, which uses the matrix of transition probabilities of the target speaker to represent the relationship between the subsequent frames, and then determines the most appropriate component of the GMM by utilizing the Viterbi algorithm for each frame of the source speaker. It avoids the spectral discontinuities between adjacent frames and the spectral averaging. Both objective and subjective evaluations have demonstrated that the proposed method improves the performance of the conventional voice conversion system based on GMM.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130165521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Camshift based real-time multiple faces match tracking 基于Camshift的实时多面匹配跟踪
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445990
Qiang Liu, C. Cai, K. Ngan, Hongliang Li
{"title":"Camshift based real-time multiple faces match tracking","authors":"Qiang Liu, C. Cai, K. Ngan, Hongliang Li","doi":"10.1109/ISPACS.2007.4445990","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445990","url":null,"abstract":"A novel CAMShift based multiple faces tracking algorithm with weighted greedy tracking and match pursuing is proposed in this paper. The greedy tracking overcomes the disadvantage of CAMShift, which tends to lose target or reiterate tracking for overlapped targets. The match pursuing identifies the tracked targets by using additional information. In addition, a whole frame PDI is introduced to monitor the change of object number in the scene and re-initialize the tracked objects if the change happened. Experimental results indicate the proposed method can track multiple faces robustly in real time.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127176286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
QHF: A quaternion based a Multidimensional Hash function 基于多维哈希函数的四元数
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4446016
R. Koide, T. Nagase, T. Araki
{"title":"QHF: A quaternion based a Multidimensional Hash function","authors":"R. Koide, T. Nagase, T. Araki","doi":"10.1109/ISPACS.2007.4446016","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4446016","url":null,"abstract":"This paper proposes a new method for constructing a multidimensional hash function based on quaternion presentation called QUATERNION hash function QHF. The input data is divided into a sequence of blocks and each block is split into four parts which are mathematically formed as quaternion's parameters. A series of data and quaternion multiplication's processing are implemented to compose a hash function kernel. Each step of data-quaternion processing is carefully scrutinized data's block to maneuver a succession of zeros which might case a possible attack. Computer based simulation is conducted to compute hash values from input quaternion data. Quaternion has non-commutative feature among its multiplication's parameters, therefore, QHF is capable to resist hash collision. Furthermore, numerical examples are given to comprehend the proposed QHF.data- quaternion processing","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120947806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A single-chip CMOS linear power amplifier for ISM-band application 用于ism波段应用的单片CMOS线性功率放大器
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445923
Chunshan Du, Zhang-fa Liu
{"title":"A single-chip CMOS linear power amplifier for ISM-band application","authors":"Chunshan Du, Zhang-fa Liu","doi":"10.1109/ISPACS.2007.4445923","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445923","url":null,"abstract":"A low-voltage CMOS linear power amplifier (PA) is presented for 2.4 GHz ISM-band short range wireless communication in this paper. All the inductors in the circuit are bonding-wire inductors and the capacitors are MIM capacitors. A novel adaptive biasing is used at the output stage, which dramatically increases the linear output power range as well as decreases the power dissipation at lower output power level. Grounding strategy is also considered to make the PA stable in all process corners. The PA is a two-stage configuration and is implemented in 0.35 mum 3.3 V CMOS process. The spectreRF simulation results show that the PA can deliver +25.2 dBm of linear output power with a power gain of higher than 29 dB in -4 dBm input power range.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"421 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122794151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
More scanning patterns for entropy coding for H.264 H.264熵编码的更多扫描模式
2007 International Symposium on Intelligent Signal Processing and Communication Systems Pub Date : 2007-11-01 DOI: 10.1109/ISPACS.2007.4445931
Yang Tao, Yuxing Peng, Zhiming Liu
{"title":"More scanning patterns for entropy coding for H.264","authors":"Yang Tao, Yuxing Peng, Zhiming Liu","doi":"10.1109/ISPACS.2007.4445931","DOIUrl":"https://doi.org/10.1109/ISPACS.2007.4445931","url":null,"abstract":"In order to reduce the bit rate and to improve the compression performance in video coding in H.264, this paper presents more scanning patterns for entropy coding. Firstly, we investigate the two designs of entropy coding, termed CA VLC and CABAC. And then according to the DCT transform, we deduce that it is possible to adopt more scanning patterns in entropy coding in H.264 to reduce the coding gain at the cost of bit rate. So this paper deduces some different features of an original or residual block, and proposes eight scanning patterns for entropy coding and the corresponding pattern decision method. In the pattern decision method, we make a full search according to the bit rate cost to select the best pattern out of all scanning patterns. Experimental results based on the H.264 JIT reference software of JM 10.1 show that employing the proposed scanning patterns bit rate reduction by up to 4~7% will be obtained with neglectable computation complexity increased and a better performance is also obtained.","PeriodicalId":220276,"journal":{"name":"2007 International Symposium on Intelligent Signal Processing and Communication Systems","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123220520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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