In this paper we describe a database containing subjective assessment scores relative to 78 video streams encoded with H.264/AVC and corrupted by simulating the transmission over error-prone network. The data has been collected from 40 subjects at the premises of two academic institutions. Our goal is to provide a balanced and comprehensive database to enable reproducible research results in the field of video quality assessment. In order to support research works on Full-Reference, Reduced-Reference and No-Reference video quality assessment algorithms, both the uncompressed files and the H.264/AVC bitstreams of each video sequence have been made publicly available for the research community, together with the subjective results of the performed evaluations.Index Terms-Subjective video quality assessment, packet loss rate, H.264/AVC, error resilience.

The Range Extensions (RExt) of the High Efficiency Video Coding (HEVC) standard have recently been approved by both ITU-T and ISO/IEC. This set of extensions targets video coding applications in areas including content acquisition, post production, contribution, distribution, archiving, medical imaging, still imaging, and screen content. In addition to the functionality of HEVC Version 1, RExt provides support for monochrome, 4:2:2 and 4:4:4 chroma sampling formats as well as increased sample bit depths beyond 10 bits per sample. This extended functionality includes new coding tools with a view to provide additional coding efficiency, greater flexibility, and throughput at high bit depths/rates. Improved lossless, nearlossless, and very high bit-rate coding is also part of the RExt scope. This paper presents the technical aspects of the HEVC Range Extensions, including a discussion of RExt profiles, tools, applications, and provides experimental results for a performance comparison with previous relevant coding technology. When compared to the High 4:4:4 Predictive Profile of H.264/AVC, the corresponding HEVC 4:4:4 RExt profile provides up to ∼25%, ∼32%, and ∼36% average bit-rate reduction at the same PSNR quality level for intra, random access, and low delay configurations, respectively.Index Terms-HEVC, H.265, MPEG-H, Range Extensions (RExt), video compression, standards • Content production in a digital video broadcasting delivery chain: This application commonly employs 4:2:2 chroma format at 10 bits per sample.

This paper describes a publicly available database of subjective scores, relative to quality assessment of 156 video streams encoded with H.264/AVC and corrupted by simulating packet losses over an error-prone network. The data has been collected in controlled test environments at the premises of two academic institutions. A detailed statistical analysis of subjective results has been performed, showing high consistency of the collected scores. In addition to subjective scores, we have made available to the research community both the uncompressed files and the H.264/AVC bitstreams of each video sequence, in order to provide a common database of benchmark data to test and compare the performance of full-reference, reduced-reference and no-reference video quality assessment algorithms.Index Terms-Subjective test, video quality assessment, H.264/AVC, packet losses.

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