Abstract
Recently increasing interest in multimedia services leads to requirements for quality assessment, especially in the video domain. There are many factors that influence the video quality. Compression technology and transmission link imperfection can be considered as the main ones. This paper deals with the assessment of the impact of H.265/HEVC compression standard on the video quality using subjective metrics. The evaluation is done for two types of sequences with Full HD resolution depending on content. The paper is divided as follows. In the first part of the article, a short characteristic of the H.265/HEVC compression standard is written. In the second part, the subjective video quality methods used in our experiments are described. The last part of this article deals with the measurements and experimental results. They showed that quality of sequences coded between 5 and 7 Mbps is for observers sufficient, so there is no need for providers to use higher bitrates in streaming than this threshold. These results are part of a new model that is still being created and will be used for predicting the video quality in networks based on IP.
Highlights
Introduction tionNowadays many new compression standards are being developed, e.g. H.265/HEVC, VP9 or DAALA
This paper focuses on video quality evaluation of the newest compression standard H.265/HEVC for Full HD resolution using subjective methods
The plots show that the assessors did not rate the video quality with extremities which confirms the fact that people mostly do not like to give the extreme values
Summary
Introduction tionNowadays many new compression standards are being developed, e.g. H.265/HEVC, VP9 or DAALA. In papers [1], [2], [3], [4], [5], [6], [7], [8], [9] the impact of bitrate on the video quality using objective metrics and in the paper [10] using subjective metrics is researched The measurements in these works show the dependence of resolution, bitrate and type of content on video quality. Since the final delay and packet loss are factors depending on full network utilization and QoS policy applied to prioritized data flow processing by routers, it is necessary to consider this link as well. It is necessary to mention that such model should correlate well with subjective perception Due to this fact it is needed to do many subjective tests. This paper focuses on video quality evaluation of the newest compression standard H.265/HEVC for Full HD resolution using subjective methods
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