Analysis of Video Quality Losses in Homogeneous HEVC Video Transcoding
| Autor: | Jakub Stankowski, Damian Karwowski, Tomasz Grajek, Olgierd Stankiewicz, Krzysztof Klimaszewski, Krzysztof Wegner |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Data stream
HEVC 0209 industrial biotechnology General Computer Science Computer science Real-time computing ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 02 engineering and technology Iterative reconstruction Transcoding Data_CODINGANDINFORMATIONTHEORY computer.software_genre Video quality 020901 industrial engineering & automation Cascaded pixel domain video transcoder 0202 electrical engineering electronic engineering information engineering H.265 General Materials Science Pixel Quantization (signal processing) General Engineering video transcoding Bit rate CPDT 020201 artificial intelligence & image processing lcsh:Electrical engineering. Electronics. Nuclear engineering video compression computer lcsh:TK1-9971 Data compression |
| Zdroj: | IEEE Access, Vol 7, Pp 96764-96774 (2019) |
| ISSN: | 2169-3536 |
| Popis: | This paper presents a detailed, quantitative analysis of video quality losses in a homogeneous HEVC video transcoder together with the analysis of the origin of those quality losses and the influence of quantization step alignment on transcoding. With the use of HM15.0 reference software and a set of test video sequences, the cascaded pixel domain video transcoder (CPDT) concept has been used to gather all the necessary data needed for the analysis. This experiment was performed for a wide range of source and target bitrates. The essential result of the work is an extensive evaluation of CPDT, commonly used as a reference in works on effective video transcoding. So far, no such extensively performed study has been made available. The quality degradation between a transcoded video and a video that would be the result of direct compression of the original video at the same bitrate as the transcoded one has been reported. The dependences between quality degradation caused by transcoding and bitrate changes of the transcoded data stream are clearly presented in graphs. |
| Databáze: | OpenAIRE |
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