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Mixed architectures for H.264/AVC digital video transrating

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Abstract
In this paper, we investigate transrating architectures for H.264/AVC video streams. Basic architectures are presented with their strengths and weaknesses. None of the existing architectures provide an appropriate solution for H.264/AVC transrating with an optimal balance between visual quality and complexity. In order to find such an appropriate solution, we propose the use of mixed transrating architectures. These architectures combine different transrating techniques which are applied depending on the picture/macroblock type. The intra-predicted pictures are decoded and re-encoded, while open-loop transrating or transrating with compensation is applied to motion-compensated pictures. Performance results show that the mixed architecture which applies spatial compensation to motion-compensated pictures gives rate-distortion results which approach the cascade of decoder and re-encoder with a complexity only slightly higher than the open-loop transrater. Adding temporal compensation for motion-compensated pictures further improves the visual quality, albeit to a lower extent, at the expense of increased complexity.
Keywords
H.264/AVC, video signal processing, requantization, transcoding, transrating, ERROR COMPENSATION, STANDARD, MPEG-2, REQUANTIZATION, TRANSCODER

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Chicago
Notebaert, Stijn, Jan De Cock, Samie Beheydt, Jan De Lameillieure, and Rik Van de Walle. 2009. “Mixed Architectures for H.264/AVC Digital Video Transrating.” Multimedia Tools and Applications 44 (1): 39–64.
APA
Notebaert, Stijn, De Cock, J., Beheydt, S., De Lameillieure, J., & Van de Walle, R. (2009). Mixed architectures for H.264/AVC digital video transrating. MULTIMEDIA TOOLS AND APPLICATIONS, 44(1), 39–64.
Vancouver
1.
Notebaert S, De Cock J, Beheydt S, De Lameillieure J, Van de Walle R. Mixed architectures for H.264/AVC digital video transrating. MULTIMEDIA TOOLS AND APPLICATIONS. 2009;44(1):39–64.
MLA
Notebaert, Stijn, Jan De Cock, Samie Beheydt, et al. “Mixed Architectures for H.264/AVC Digital Video Transrating.” MULTIMEDIA TOOLS AND APPLICATIONS 44.1 (2009): 39–64. Print.
@article{770479,
  abstract     = {In this paper, we investigate transrating architectures for H.264/AVC video streams. Basic architectures are presented with their strengths and weaknesses. None of the existing architectures provide an appropriate solution for H.264/AVC transrating with an optimal balance between visual quality and complexity. In order to find such an appropriate solution, we propose the use of mixed transrating architectures. These architectures combine different transrating techniques which are applied depending on the picture/macroblock type. The intra-predicted pictures are decoded and re-encoded, while open-loop transrating or transrating with compensation is applied to motion-compensated pictures. Performance results show that the mixed architecture which applies spatial compensation to motion-compensated pictures gives rate-distortion results which approach the cascade of decoder and re-encoder with a complexity only slightly higher than the open-loop transrater. Adding temporal compensation for motion-compensated pictures further improves the visual quality, albeit to a lower extent, at the expense of increased complexity.},
  author       = {Notebaert, Stijn and De Cock, Jan and Beheydt, Samie and De Lameillieure, Jan and Van de Walle, Rik},
  issn         = {1380-7501},
  journal      = {MULTIMEDIA TOOLS AND APPLICATIONS},
  keyword      = {H.264/AVC,video signal processing,requantization,transcoding,transrating,ERROR COMPENSATION,STANDARD,MPEG-2,REQUANTIZATION,TRANSCODER},
  language     = {eng},
  number       = {1},
  pages        = {39--64},
  title        = {Mixed architectures for H.264/AVC digital video transrating},
  url          = {http://dx.doi.org/10.1007/s11042-009-0273-0},
  volume       = {44},
  year         = {2009},
}

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