ITU-T J 343 AMD 1-2018 Hybrid perceptual bitstream models for objective video quality measurements Amendment 1 (Study Group 12).pdf
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1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T J.343 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1 (05/2018) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Measurement of the quality of service - Part
2、3 Hybrid perceptual bitstream models for objective video quality measurements Amendment 1 Recommendation ITU-T J.343 (2014) Amendment 1 Rec. ITU-T J.343 (2014)/Amd.1 (05/2018) i Recommendation ITU-T J.343 Hybrid perceptual bitstream models for objective video quality measurements Amendment 1 Summary
3、 Recommendation ITU-T J.343 specifies objective video quality measurement methods which use bitstream data in addition to processed video sequences. From bitstream data, the models can obtain additional information on the codec type, bit rate, frame rate, some transmission errors and spatial/tempora
4、l shifts. Consequently, such models may provide improved performance compared to objective video quality models, which use only processed video sequences. Amendment 1 adds a new Appendix I containing information about test vectors for the ITU-T J.343 family of Recommendations. History Edition Recomm
5、endation Approval Study Group Unique ID* 1.0 ITU-T J.343 2014-11-29 9 11.1002/1000/12315 1.1 ITU-T J.343 (2014) Amd. 1 2018-05-10 12 11.1002/1000/13619 Keywords Bitstream data, objective methods, test vectors, video. _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address
6、 field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T J.343 (2014)/Amd.1 (05/2018) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunicati
7、ons, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunication
8、s on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure lai
9、d down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunica
10、tion administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mand
11、atory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws a
12、ttention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or ot
13、hers outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent t
14、he latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T J.343 (2014)/Amd.1
15、(05/2018) iii Table of Contents Page 1 Scope . 1 1.1 Applications 1 2 References . 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 3 5 Conventions 3 6 Description of hybrid perceptual bitstream model types 4 Annex A Summary of
16、 VQEG validation of hybrid models 7 A.1 Subjective datasets 7 A.2 Model performance summary . 9 Appendix I Test vectors for the ITU-T J.343 family of standards 18 Bibliography. 19 iv Rec. ITU-T J.343 (2014)/Amd.1 (05/2018) Introduction Generally video quality estimation models are, depending upon th
17、e required input signals, categorized as no reference (NR), reduced reference (RR) and full reference (FR) models. NR models are provided with the processed video sequences only. RR models require that features extracted from the reference video sequences and the processed video sequences are provid
18、ed. For FR models, the unimpaired reference and the processed video sequences must be provided. In addition, the models described in this Recommendation need access to the received bitstream data from which the model can obtain information on transmission errors (e.g., delay, packet loss), codec (e.
19、g., type, bit-rates, frame rates, codec parameters), etc. Consequently, the models described here are categorized as hybrid models (i.e., Hybrid-NR, Hybrid-RR and Hybrid-FR). Rec. ITU-T J.343 (2014)/Amd.1 (05/2018) 1 Recommendation ITU-T J.343 Hybrid perceptual bitstream models for objective video q
20、uality measurements Amendment 1 Editorial note: This is a complete-text publication. Modifications introduced by this amendment are shown in revision marks relative to Recommendation ITU-T J.343 (2014). 1 Scope This Recommendation describes recommended objective models for non-intrusive monitoring o
21、f the video quality of IP-based video services based on the decoded video frames and packet-header. Some types of models also utilize the reference video or bitstream information. This Recommendation addresses six application areas: ITU-T J.343.1 specifies Hybrid-NRe models ITU-T J.343.2 specifies H
22、ybrid-NR models ITU-T J.343.3 specifies Hybrid-RRe models ITU-T J.343.4 specifies Hybrid-RR models ITU-T J.343.5 specifies Hybrid-FRe models ITU-T J.343.6 specifies Hybrid-FR models ITU-T J.343.1 includes two models, ITU-T J.343.2 includes one model, ITU-T J.343.3 includes one model that operates at
23、 multiple side channel bandwidths to transmit the reduced reference information, ITU-T J.343.4 includes one model that operates at multiple side channel bandwidths to transmit the reduced reference information, ITU-T J.343.5 includes two models and ITU-T J.343.6 includes two models. All of these mod
24、els predict video quality in terms of mean opinion score (MOS), for example on a five-level absolute category rating (ACR) scale (see ITU-T P.910 or ITU-T P.913). 1.1 Applications This Recommendation describes models that estimate perceptual video quality. The applications for the estimation models
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