978 Hits in 4.8 sec

An objective approach to assessing relative perceptual quality of MPEG-encoded video sequences

Lee Wang, R.S. Ramanujan, J.A. Newhouse, M. Kaddoura, A. Ahamad, K.J. Thurber, H.J. Siegel
Proceedings of IEEE International Conference on Multimedia Computing and Systems  
A novel objective approach to assessing the relative perceptual quality of MPEG-encoded video sequences is presented in this paper.  ...  Quality comparison of two MPEG-encoded video sequences is performed directly in the frequency domain rather than in the pixel domain. This approach consists of masking and pooling phases.  ...  In Section 5, a novel objective approach to relative perceptual quality assessment of MPEG-encoded video sequences is discussed.  ... 
doi:10.1109/mmcs.1997.609786 dblp:conf/icmcs/WangRNKATS97 fatcat:4gu2t7rgubb53ietfnfn3nnewe

An experimental approach of video quality level dependence on video content dynamics

Harilaos Koumaras, Julien Arnaud, Daniel Negru, Anastasios Kourtis
2009 Proceedings of the 5th International Mobile Multimedia Communications Conference  
The objective of this paper is to research the impact of the spatiotemporal dynamics of the video content on the deduced perceptual quality.  ...  This paper deals with the notion of user satisfaction relative to the consumption of modern encoded video applications and services.  ...  The existing literature of video quality assessment techniques focuses on models and techniques evaluating and assessing the perceptual level of an already encoded and/or served video service.  ... 
doi:10.4108/icst.mobimedia2009.7506 dblp:conf/mobimedia/KoumarasANK09 fatcat:o2szw2rmtnaqhh7f3uvxker5xy

Statistical multiplexing of H.264 programs

Luis Teixeira, Luis Corte-Real
2007 2007 International Conference on Intelligent and Advanced Systems  
The advent of H.264/AVC is going to change the way Digital Television programs are broadcast.  ...  Each program can be independently encoded or jointly encoded resulting thus in a more efficient way to distribute the available channel bandwidth.  ...  Structural Similarity Index (SSIM) SSIM is an objective image quality assessment metric which attributes perceptual degradations to structural distortions.  ... 
doi:10.1109/icias.2007.4658462 fatcat:jquekm6vbvh2jhj664idmntqhu

Quantitative perceptual comparison of variable bit rate over constant bit rate encoding scheme for MPEG-4 video

George Gardikis
2007 Journal of Electronic Imaging (JEI)  
They would also like to thank the anonymous reviewers for their helpful and constructive comments on the submitted manuscript, which improved the presentation and the quality of this paper.  ...  ACKOWLEDGEMENT The authors want to acknowledge the contribution of the student Spyridon Papagiakoumos at performing the experimental part of this paper.  ...  Conclusions This paper has presented an analytical and quantitative approach of the perceptual efficiency of VBR encoding mode over CBR for MPEG-4 ASP/CIF-QCIF encoded sequences.  ... 
doi:10.1117/1.2775465 fatcat:lafzmgsdv5dnbdddk3cnhbensa

Objective No-Reference Video Quality Assessment Method Based on Spatio-Temporal Pixel Analysis

Wyllian B. da SILVA, Keiko V. O. FONSECA, Alexandre de A. P. POHL
2015 IEICE transactions on information and systems  
for H.264 streams. key words: H.264, MPEG-2, no-reference metric, objective video quality assessment  ...  Thus, an objective no-reference video quality assessment metric is proposed based on the sigmoid model using spatialtemporal features weighted by parameters obtained through the solution of a nonlinear  ...  The method is devised and optimized to assess the quality of H.264 and MPEG-2 streams, which are still the most used encoding systems for video delivery.  ... 
doi:10.1587/transinf.2014edp7155 fatcat:2dwhzewl6vbvpjf2n463t45za4

A framework for end-to-end video quality prediction of MPEG video

Harilaos Koumaras, C.-H. Lin, C.-K. Shieh, Anastasios Kourtis
2010 Journal of Visual Communication and Image Representation  
This paper proposes, describes and evaluates a novel framework for video quality prediction of MPEG-based video services, considering the perceptual degradation that is introduced by the encoding process  ...  The concept of video quality prediction is considered in this work, according to which the encoding parameters of the video service and the network QoS conditions are used for performing an estimation/  ...  video sequence in order to peform an assessment of the quality.  ... 
doi:10.1016/j.jvcir.2009.07.005 fatcat:ar4gz4oq3jhovolljl2ds5lfg4

Perceptual feedback in multigrid motion estimation using an improved DCT quantization

J. Malo, J. Gutierrez, I. Epifanio, F.J. Ferri, J.M. Artigas
2001 IEEE Transactions on Image Processing  
Perceptually meaningful distortion measures and the reconstructed frames show the subjective improvements of the proposed scheme versus an H.263 scheme with unweighted motion estimation and MPEG-like quantization  ...  A novel procedure for the encoding of the prediction errors has been used. This procedure restricts the maximum perceptual distortion in each transform coefficient.  ...  Soret for valuable discussions on the hardware implementation of the algorithms described in this paper.  ... 
doi:10.1109/83.951528 pmid:18255486 fatcat:solpssj5srf3zmz4c5mi6atjhe

Video Quality Prediction based on the Spatial and Temporal Classification of the Uncompressed Content

Harilaos Koumaras, Anastasios Kourtis
2007 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications  
The objective of the paper is to research the relationship of the spatiotemporal dynamics of the content to the deduced perceptual quality of a MPEG-based encoded video.  ...  This paper deals with the notion of user satisfaction relative to the consumption of modern encoded video applications and services.  ...  The existing literature of video quality assessment techniques focuses on models and techniques for evaluating and assessing the PQoS level of an already encoded and/or served video service.  ... 
doi:10.1109/pimrc.2007.4394849 dblp:conf/pimrc/KoumarasK07 fatcat:e2rxdfr6cbf3jdqxeut2pm7owu

Compression efficiency of HDR/LDR content

Maryam Azimi, Ronan Boitard, Basak Oztas, Stelios Ploumis, Hamid Reza Tohidypour, Mahsa T. Pourazad, Panos Nasiopoulos
2015 2015 Seventh International Workshop on Quality of Multimedia Experience (QoMEX)  
High Dynamic Range (HDR) imaging is capable of delivering a wider range of luminance and color gamut compared to Standard Dynamic Range (SDR), offering to viewers a visual quality of experience close to  ...  In this study, we evaluate the quality of coded original HDR streams and HDR streams reconstructed from SDR videos and metadata, both compressed by the HEVC standard.  ...  Overall, the encoding of the HDR videos leads to an improvement of MOS by 2.5, 0.26, 2.26 compared to encoding SDR10 and by 2.17, 0.18, 1.45 compared to encoding SDR8 videos at the same bitrate level for  ... 
doi:10.1109/qomex.2015.7148154 dblp:conf/qomex/AzimiBOPTPN15 fatcat:ynzy3hkivjca5livyme4e7rjqq

Perception-oriented video coding based on texture analysis and synthesis

Patrick Ndjiki-Nya, Dave Bull, Thomas Wiegand
2009 2009 16th IEEE International Conference on Image Processing (ICIP)  
They are also referred to as content-based video coding (CBVC) methods in this paper. For better insight into CBVC, an overview on texture analysis and synthesis is also given.  ...  of state-of-the-art hybrid video codecs like H.264/AVC.  ...  Shape coding is based on an object-based coding approach, where video objects are matched to the content of the scene. This is achieved by representing objects using pixel-accurate shapes.  ... 
doi:10.1109/icip.2009.5414386 dblp:conf/icip/Ndjiki-NyaBW09 fatcat:7c3ovzcapjcqbft3yiydf4ihxi

In-Depth Review of Advanced Coding Technologies for Low Bit Rate Broadcast Applications

J. Bennett, A. Bock
2004 SMPTE Motion Imaging Journal  
This is also due, in part, to the difficulties of finding an objective measure for audio quality that can be reproduced uni- versally.  ...  However, the new technolo- gies can allow reasonable operation in the region of 64 to 96 kbits/sec with similar quality to the original MPEG-1 Layer Il at 256 kbits/sec, allow- ing an increase in video  ... 
doi:10.5594/j16246 fatcat:r4h4xkx2xbdjdczmuufqlv4a4e

IPTV quality assessment system

Luis Casadesus, Julián Fernández-Navajas, Luis Sequeira, Idelkys Quintana, Jose Saldana, José Ruiz-Mas
2012 Proceedings of the 7th Latin American Networking Conference on - LANC '12  
For this it is important to have tools to evaluate the quality of service provided. This paper presents a system for IPTV quality assessment.  ...  This will allow us to study the user's perceived quality for different codecs, bit rates, frame rates and video resolutions, and the impact of the network packet loss rate, in order to determine the objective  ...  ACKNOWLEDGMENTS This work has been partially financed by CPUFLIPI Project (MICINN TIN2010-17298), MBACToIP Project, Aragon I+D Agency, Ibercaja Obra Social, Project of Cátedra Telefónica, Univ. of Zaragoza  ... 
doi:10.1145/2382016.2382026 dblp:conf/lanc/CasadesusFSQSR12 fatcat:4qomprkhcjeuvlshvxq3ffp7qm

Joint Coding of Multiple H.264 Video Programs [chapter]

Luís Teixeira, Luís Corte-Real
2008 Lecture Notes in Computer Science  
Several complexity metrics are assessed. Initial results are presented and discussed.  ...  This paper presents a joint coding scheme for multiple H.264/AVC video programs. Channel bandwidth is divided among different programs according its complexity.  ...  Video Quality Assessment Normally, to assess the video quality we can find, in the literature, metrics such as the Peak signal-to-noise ratio (PSNR) and the Mean Square Error (MSE), Sum of Squared Differences  ... 
doi:10.1007/978-3-540-85920-8_90 fatcat:autw57i7qnd6nblxjh35wc7hzq

Perceptual-based Quality Metrics for Image and Video Services: A Survey

Ulrich Engelke, Hans-Jurgen Zepernick
2007 2007 Next Generation Internet Networks  
As such, these perceptual-based image and video quality metrics may build a bridge between the assessment of quality as experienced by the end-user and the quality of service parameters that are usually  ...  It is hence crucial to classify these methods in order to find the favorable approach for an intended application.  ...  A method for objectively evaluating perceived quality of service (PQoS) for MPEG-4 coded video content is reported in [44] .  ... 
doi:10.1109/ngi.2007.371215 fatcat:bx4zfrux35fjpo75jglfhb4i2i

A Pragmatically Designed Adaptive and Web-compliant Object-based Video Streaming Methodology

Maarten Wijnants, Gustavo Rovelo, Peter Quax, Wim Lamotte
2016 Proceedings of the 2016 ACM on Multimedia Conference - MM '16  
This paper reports on a pragmatically designed video streaming approach that exploits object-related knowledge in order to improve the real-time adaptability of video streaming sessions (manifested in  ...  streaming in terms of user-perceived video quality.  ...  The research leading to these results has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement nr 610370, ICoSOLE ("Immersive Coverage of Spatially  ... 
doi:10.1145/2964284.2964300 dblp:conf/mm/WijnantsRQL16 fatcat:7k4ckxxt7jcebfjmdzmbodvw4a
« Previous Showing results 1 — 15 out of 978 results