AVC to HEVC transcoder based on quadtree limitation

Autor: Frederic Dufaux, Marco Cagnazzo, Elie Gabriel Mora
Přispěvatelé: Laboratoire Traitement et Communication de l'Information (LTCI), Télécom ParisTech-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des signaux et systèmes (L2S), Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Eurostars ToFu TV, Multimédia (MM), Institut Mines-Télécom [Paris] (IMT)-Télécom Paris-Institut Mines-Télécom [Paris] (IMT)-Télécom Paris, Département Images, Données, Signal (IDS), Télécom ParisTech, Télécom Paristech, Admin
Jazyk: angličtina
Rok vydání: 2017
Předmět:
HEVC
Computer Networks and Communications
Computer science
[INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing
Real-time computing
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
02 engineering and technology
Transcoding
Data_CODINGANDINFORMATIONTHEORY
transcoding
computer.software_genre
quadtree limitation
AVC
Quadtree limitation
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing
0202 electrical engineering
electronic engineering
information engineering
Media Technology
Quadtree
[INFO.INFO-MM] Computer Science [cs]/Multimedia [cs.MM]
[INFO.INFO-MM]Computer Science [cs]/Multimedia [cs.MM]
020207 software engineering
Quarter-pixel motion
Hardware and Architecture
[INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV]
020201 artificial intelligence & image processing
computer
Encoder
[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Software
Context-adaptive variable-length coding
Zdroj: Multimedia Tools and Applications
Multimedia Tools and Applications, Springer Verlag, 2017, 76 (6), pp.8991-9015. ⟨10.1007/s11042-016-3498-8⟩
Multimedia Tools and Applications, Springer Verlag, 2017, 76 (6), pp.8991-9015
ISSN: 1380-7501
1573-7721
DOI: 10.1007/s11042-016-3498-8⟩
Popis: International audience; Following the finalization of the state-of-the-art High Efficiency Video Coding (HEVC) standard in January 2013, several new services are being deployed in order to take advantage of the superior coding efficiency (estimated at 50 % less bitrate for the same visual quality) that this standard provides over its predecessor: H.264 / Advanced Video Coding (AVC). However, the switch from AVC to HEVC is not trivial as most video content is still encoded in AVC. Consequently, there is a growing need for fast AVC to HEVC transcoders in the market today. While a trivial transcoder can be made by simply cascading an AVC decoder and an HEVC encoder, fast transcoding cannot be achieved. In this paper, we present an AVC to HEVC transcoder where decoded AVC blocks are first fused according to their motion similarity. The resulting fusion map is then used to limit the quadtree of HEVC coded frames. AVC motion vectors are also used to determine a better starting point for integer motion estimation. Experimental results show that significant transcoder execution time savings of 63 % can be obtained with only a 1.4 % bitrate increase compared to the trivial transcoder.
Databáze: OpenAIRE
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