Int. J. Digit. Multim. Broadcast.最新文献_第3页

Generative Adversarial Network-Based Edge-Preserving Superresolution Reconstruction of Infrared Images 基于生成对抗网络的红外图像保边超分辨率重建

Int. J. Digit. Multim. Broadcast. Pub Date : 2021-07-21 DOI: 10.1155/2021/5519508

Yuqing Zhao, Guangyuan Fu, Hongqiao Wang, Shaolei Zhang, Min Yue

引用次数: 1

Multibody Nonrigid Structure from Motion Segmentation Based on Sparse Subspace Clustering 基于稀疏子空间聚类的多体非刚性结构运动分割

Int. J. Digit. Multim. Broadcast. Pub Date : 2021-03-29 DOI: 10.1155/2021/6686179

Wenqing Huang, Qingfeng Hu, Yaming Wang, M. Jiang

引用次数: 1

A Safe and Secured Medical Textual Information Using an Improved LSB Image Steganography 利用改进的LSB图像隐写技术实现安全可靠的医学文本信息

Int. J. Digit. Multim. Broadcast. Pub Date : 2021-03-26 DOI: 10.1155/2021/8827055

R. Ogundokun, O. Abikoye

{"title":"A Safe and Secured Medical Textual Information Using an Improved LSB Image Steganography","authors":"R. Ogundokun, O. Abikoye","doi":"10.1155/2021/8827055","DOIUrl":"https://doi.org/10.1155/2021/8827055","url":null,"abstract":"Safe conveyance of medical data across unsecured networks nowadays is an essential issue in telemedicine. With the exponential growth of multimedia technologies and connected networks, modern healthcare is a huge step ahead. Authentication of a diagnostic image obtained from a specialist at a remote location which is from the sender is one of the most challenging tasks in an automated healthcare setup. Intruders were found to be able to efficiently exploit securely transmitted messages from previous literature since the algorithms were not efficient enough leading to distortion of information. Therefore, this study proposed a modified least significant bit (LSB) technique capable of protecting and hiding medical data to solve the crucial authentication issue. The application was executed and established by utilizing MATLAB 2018a, and it used a logical bit shift operation for execution. The investigational outcomes established that the proposed technique can entrench medical information without leaving a perceptible falsification in the stego image. The result of this implementation shows that the modified LSB image steganography outperformed the standard LSB technique with a higher PSNR value and lower MSE value when compared with previous research works. The number of shifts was added as a new performance metric for the proposed system. The study concluded that the proposed secured medical information system was evidenced to be proficient in secreting medical information and creating undetectable stego images with slight entrenching falsifications when likened to other prevailing approaches.","PeriodicalId":204253,"journal":{"name":"Int. J. Digit. Multim. Broadcast.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124765339","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: 7

Crowd Motion Editing Based on Mesh Deformation 基于网格变形的人群运动编辑

Int. J. Digit. Multim. Broadcast. Pub Date : 2020-12-07 DOI: 10.1155/2020/3634054

Yong Zhang, Xinyu Zhang, Tao Zhang, Baocai Yin

引用次数: 3

Capacity Improvement for DVB-NGH with Dual-Polarized MIMO Spatial Multiplexing and Hybrid Beamforming 采用双极化MIMO空间复用和混合波束形成技术提高DVB-NGH容量

Int. J. Digit. Multim. Broadcast. Pub Date : 2020-08-17 DOI: 10.1155/2020/9578521

H. Nguyen, Trung-Tan Le, Trung-Hien Nguyen

{"title":"Capacity Improvement for DVB-NGH with Dual-Polarized MIMO Spatial Multiplexing and Hybrid Beamforming","authors":"H. Nguyen, Trung-Tan Le, Trung-Hien Nguyen","doi":"10.1155/2020/9578521","DOIUrl":"https://doi.org/10.1155/2020/9578521","url":null,"abstract":"Multiple-input multiple-output (MIMO) antenna scheme is an effective technique for future terrestrial broadcasting systems such as digital video broadcasting-next-generation handheld (DVB-NGH) to overcome the limits on information theory of traditional single-antenna wireless communications without any additional bandwidth or increased transmit power. In this paper, we propose a hybrid beamforming scheme for dual-polarized MIMO spatial multiplexing DVB-NGH broadcasting systems. The system of interest makes use of phase shifters and amplitude attenuators for the digital-analog precoder at beamforming stage of the transmitter end to maximize the signal-to-noise ratio to increase the channel capacity of the DVB-NGH systems. At the receiver end, the maximum likelihood (ML) detector is used to evaluate the system performance. We consider the signal-to-interference-and-noise ratio (SINR) and the achievable average capacity for the DVB-NGH MIMO with various FFT sizes, number of transmit antennas, and different modulation schemes. The performance results on bit error rate, channel capacity, and beampatterns show that the proposed hybrid beamforming and dual-polarized MIMO spatial multiplexing schemes provide more robustness against signal interference by beamforming and/or nulling techniques. The simulation results also show that the proposed system achieves higher capacity than the existing MIMO schemes for the DVB-NGH systems.","PeriodicalId":204253,"journal":{"name":"Int. J. Digit. Multim. Broadcast.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123774589","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 Cognitive Radio Spectrum Sensing Method for an OFDM Signal Based on Deep Learning and Cycle Spectrum 基于深度学习和周期频谱的OFDM信号认知频谱感知方法

Int. J. Digit. Multim. Broadcast. Pub Date : 2020-03-06 DOI: 10.1155/2020/5069021

Guangliang Pan, Jun Li, Fei Lin

引用次数: 21

Identification of Weakly Pitch-Shifted Voice Based on Convolutional Neural Network 基于卷积神经网络的弱音高移位语音识别

Int. J. Digit. Multim. Broadcast. Pub Date : 2020-01-06 DOI: 10.1155/2020/8927031

Yongchao Ye, Lingjie Lao, Diqun Yan, Rangding Wang

引用次数: 6

Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM 与AAC、MP3和未压缩的PCM相比，ACER编解码器压缩音乐的主观评价

Int. J. Digit. Multim. Broadcast. Pub Date : 2019-07-11 DOI: 10.1155/2019/8265301

Stuart Cunningham, I. Mcgregor

{"title":"Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM","authors":"Stuart Cunningham, I. Mcgregor","doi":"10.1155/2019/8265301","DOIUrl":"https://doi.org/10.1155/2019/8265301","url":null,"abstract":"Audio data compression has revolutionised the way in which the music industry and musicians sell and distribute their products. Our previous research presented a novel codec named ACER (Audio Compression Exploiting Repetition), which achieves data reduction by exploiting irrelevancy and redundancy in musical structure whilst generally maintaining acceptable levels of noise and distortion in objective evaluations. However, previous work did not evaluate ACER using subjective listening tests, leaving a gap to demonstrate its applicability under human audio perception tests. In this paper, we present a double-blind listening test that was conducted with a range of listeners (N=100). The aim was to determine the efficacy of the ACER codec, in terms of perceptible noise and spatial distortion artefacts, against de facto standards for audio data compression and an uncompressed reference. Results show that participants reported no perceived differences between the uncompressed, MP3, AAC, ACER high quality, and ACER medium quality compressed audio in terms of noise and distortions but that the ACER low quality format was perceived as being of lower quality. However, in terms of participants’ perceptions of the stereo field, all formats under test performed as well as each other, with no statistically significant differences. A qualitative, thematic analysis of listeners’ feedback revealed that the noise artefacts that produced the ACER technique are different from those of comparator codecs, reflecting its novel approach. Results show that the quality of contemporary audio compression systems has reached a stage where their performance is perceived to be as good as uncompressed audio. The ACER format is able to compete as an alternative, with results showing a preference for the ACER medium quality versions over WAV, MP3, and AAC. The ACER process itself is viable on its own or in conjunction with techniques such as MP3 and AAC.","PeriodicalId":204253,"journal":{"name":"Int. J. Digit. Multim. Broadcast.","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131193027","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

Projection Analysis Optimization for Human Transition Motion Estimation 投影分析优化人体过渡运动估计

Int. J. Digit. Multim. Broadcast. Pub Date : 2019-06-02 DOI: 10.1155/2019/6816453

Wanyi Li, Feifei Zhang, Qiang Chen, Q. Zhang

引用次数: 0

Peer-Assisted Content Delivery to Reduce the Bandwidth of TSTV Service in IPTV System 减少IPTV系统中TSTV业务带宽的对等辅助内容分发

Int. J. Digit. Multim. Broadcast. Pub Date : 2019-04-14 DOI: 10.1155/2019/2495310

El Hassane Khabbiza, R. E. Alami, H. Qjidaa

引用次数: 4