Subjective quality assessment of error concealment strategies for 3DTV in the presence of asymmetric transmission errors

2012 Fourth International Workshop on Quality of Multimedia Experience

Pérez²,

Jaureguizar

et al. 2012

Transmission errors are the main cause of degradation of the quality of real broadcasted video services. Therefore, knowing their impact on the quality of experience of the end users is a crucial issue. For instance, it would help to improve the performance of the distribution systems, and to develop monitoring tools to automatically estimate the quality perceived by the viewers. In this paper we validate a subjective evaluation approach specifically designed to obtain meaningful results of the effects of degradations caused by transmission errors. This methodology has been already used in our previous works with monoscopic and stereoscopic videos. The validation is done by comparing the subjective ratings obtained for typical transmission impairments with the proposed methodology and with the standard method Absolute Category Rating. The results show that the proposed approach could provide more representative evaluations of the quality of experience perceived by end users of conventional and 3D broadcasted video services.

Section: Related Workmentioning

confidence: 99%

Section: Analyzed Impairmentsmentioning

confidence: 99%

Validation of a novel approach to subjective quality evaluation of conventional and 3D broadcasted video services

2012 Fourth International Workshop on Quality of Multimedia Experience

Pérez²,

Jaureguizar

et al. 2012

“…For example, dealing with stereo views, the effects of coding artifacts could be more annoying if each view is affected differently, making the fusion of both images difficult for the HVS. For instance, it has been shown that when blocking effects affect each view differently, binocular rivalry could be produced [2]. Some other studies analyzed the effects of coding V+D formats, showing that the HVS is less sensitive to distortions affecting the depth map than those degrading the quality of video color [34].…”

Section: Effect Of Coding Artifactsmentioning

confidence: 99%

“…One example can be found in [2], where Barkowsky et al carried out a subjective study of the effects of different patterns of packet losses in a simulcast scenario. In addition, various error concealment techniques for 3DTV were analyzed.…”

Section: Effect Of Transmission Errorsmentioning

confidence: 99%

Providing 3D Video Services: The Challenge From 2D to 3DTV Quality of Experience

Cubero¹,

Pérez³

et al. 2012

Bell Labs Tech. J.

Recently, three-dimensional (3D) video has decisively burst onto the entertainment industry scene, and has arrived in households even before the standardization process has been completed. 3D television (3DTV) adoption and deployment can be seen as a major leap in television history, similar to previous transitions from black and white (B&W) to color, from analog to digital television (TV), and from standard definition to high definition. In this paper, we analyze current 3D video technology trends in order to define a taxonomy of the availability and possible introduction of 3D-based services. We also propose an audiovisual network services architecture which provides a smooth transition from two-dimensional (2D) to 3DTV in an Internet Protocol (IP)-based scenario. Based on subjective assessment tests, we also analyze those factors which will influence the quality of experience in those 3D video services, focusing on effects of both coding and transmission errors. In addition, examples of the application of the architecture and results of assessment tests are provided. IntroductionBoth the entertainment industry and the research community are focused on the decisive introduction and evolution of three-dimensional (3D) video in entertainment media. The possibilities of this novelty technology in terms of immersiveness and enhancement of the user experience are generating great expectations in the sector, as new market and business opportunities are foreseen.Several possible 3D scenarios can be materialized in the short to medium term to offer the end user a 3D experience. In this paper we identify these scenarios, and analyze the technology-associated trends in the whole end-to-end chain, from content capture to content display, including coding and representation formats, and available delivery standards.Taking an Internet Protocol (IP)-based scenario as the starting point, we propose an architecture for the delivery of 3D content, identifying the new functionalities required for managing 3D content. Moreover, 3D content information is organized and aggregated in different ways, depending on the technology involved in the implementation of each particular scenario. Thus, the end user experience can be improved by taking advantage of the new solutions made available through content-aware processing appliances and services hosted at either the head end or in the delivery network. Such solutions have already been successfully demonstrated in two-dimensional (2D) video [27].In this sense, the characterization of the quality of experience (QoE) of the end user depends highly on the particular technologies adopted for the representation, coding, and delivery of 3D content. In this paper, we also present the results of preliminary work on how losses during content compression or content distribution impact user perception. 3D ScenariosProviding the depth perception necessary to enhance the audiovisual content experience is a pressing issue in both the entertainment industry and the There is no unique way to fulfill th...

“…In this paper a study of the impact of transmission errors in 3DTV is presented. In contrast to the numerous studies of this type of distortions made for conventional video [5] [6], only a few publications exist for stereoscopic sequences [7] [8]. Moreover, little research has been done analyzing the performance of the first approaches for delivering 3DTV that are being recently used [9].…”

Section: Introductionmentioning

confidence: 99%

Subjective assessment of the impact of transmission errors in 3DTV compared to HDTV

2011 3DTV Conference: The True Vision - Capture, Transmission and Display of 3D Video (3dtv-Con)

Pérez²,

Jaureguizar

et al. 2011

Recently, broadcasted 3D video content has reached households with the first generation of 3DTV. However, few studies have been done to analyze the Quality of Experience (QoE) perceived by the end-users in this scenario. This paper studies the impact of transmission errors in 3DTV, considering that the video is delivered in side-by-side format over a conventional packet-based network. For this purpose, a novel evaluation methodology based on standard single stimulus methods and with the aim of keeping as close as possible the home environment viewing conditions has been proposed. The effects of packet losses in monoscopic and stereoscopic videos are compared from the results of subjective assessment tests. Other aspects were also measured concerning 3D content as naturalness, sense of presence and visual fatigue. The results show that although the final perceived QoE is acceptable, some errors cause important binocular rivalry, and therefore, substantial visual discomfort.