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Increased flexibility in inter picture partitioning

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Abstract
To attain efficient coding of sequences with complex motion activity, modern video coding standards allow variable block sizes to be employed in temporal prediction. A block with complex motion can be partitioned into two equal-sized halves or into four quadrants. In this paper we study the impact of allowing blocks to be partitioned in two unequal subpartitions. Additionally, we allow block partitioning along diagonal edges. These provisions allows encoders to better adapt to the local characteristics of the motion activity in a video sequence. We verified experimentally that the presence of partitioning edges that do not coincide with transform boundaries does not negatively impact the decorrelating strength of the residual transform, so the proposed extended partitioning strategies can be applied regardless of the details of the residual coder. Implementing the proposed extended partitioning modes in an H.264/AVC coder at the macroblock and submacroblock level, we observe that coding efficiency gains are greatest in low-resolution sequences, where moving features in the video sequence tend to be more spatially localized. For CIF and QCIF sequences we achieve a bit rate reduction of about 3-6% over a wide fidelity range.
Keywords
STANDARD, VIDEO COMPRESSION

Citation

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Chicago
Vermeirsch, Kenneth, Jan De Cock, Stijn Notebaert, Peter Lambert, and Rik Van de Walle. 2008. “Increased Flexibility in Inter Picture Partitioning.” In 2008 IEEE 10TH WORKSHOP ON MULTIMEDIA SIGNAL PROCESSING, VOLS 1 AND 2, ed. D Feng, T Sikora, J Zhang, L Guan, J Dugelay, Q Wu, and W Li, 284–288. New York, NY, USA: IEEE.
APA
Vermeirsch, Kenneth, De Cock, J., Notebaert, S., Lambert, P., & Van de Walle, R. (2008). Increased flexibility in inter picture partitioning. In D. Feng, T. Sikora, J. Zhang, L. Guan, J. Dugelay, Q. Wu, & W. Li (Eds.), 2008 IEEE 10TH WORKSHOP ON MULTIMEDIA SIGNAL PROCESSING, VOLS 1 AND 2 (pp. 284–288). Presented at the 10th IEEE Workshop on Multimedia Signal Processing, New York, NY, USA: IEEE.
Vancouver
1.
Vermeirsch K, De Cock J, Notebaert S, Lambert P, Van de Walle R. Increased flexibility in inter picture partitioning. In: Feng D, Sikora T, Zhang J, Guan L, Dugelay J, Wu Q, et al., editors. 2008 IEEE 10TH WORKSHOP ON MULTIMEDIA SIGNAL PROCESSING, VOLS 1 AND 2. New York, NY, USA: IEEE; 2008. p. 284–8.
MLA
Vermeirsch, Kenneth, Jan De Cock, Stijn Notebaert, et al. “Increased Flexibility in Inter Picture Partitioning.” 2008 IEEE 10TH WORKSHOP ON MULTIMEDIA SIGNAL PROCESSING, VOLS 1 AND 2. Ed. D Feng et al. New York, NY, USA: IEEE, 2008. 284–288. Print.
@inproceedings{678770,
  abstract     = {To attain efficient coding of sequences with complex motion activity, modern video coding standards allow variable block sizes to be employed in temporal prediction. A block with complex motion can be partitioned into two equal-sized halves or into four quadrants. In this paper we study the impact of allowing blocks to be partitioned in two unequal subpartitions. Additionally, we allow block partitioning along diagonal edges. These provisions allows encoders to better adapt to the local characteristics of the motion activity in a video sequence. We verified experimentally that the presence of partitioning edges that do not coincide with transform boundaries does not negatively impact the decorrelating strength of the residual transform, so the proposed extended partitioning strategies can be applied regardless of the details of the residual coder.
Implementing the proposed extended partitioning modes in an H.264/AVC coder at the macroblock and submacroblock level, we observe that coding efficiency gains are greatest in low-resolution sequences, where moving features in the video sequence tend to be more spatially localized. For CIF and QCIF sequences we achieve a bit rate reduction of about 3-6\% over a wide fidelity range.},
  author       = {Vermeirsch, Kenneth and De Cock, Jan and Notebaert, Stijn and Lambert, Peter and Van de Walle, Rik},
  booktitle    = {2008 IEEE 10TH WORKSHOP ON MULTIMEDIA SIGNAL PROCESSING, VOLS 1 AND 2},
  editor       = {Feng, D and Sikora, T and Zhang, J and Guan, L and Dugelay, J and Wu, Q and Li, W},
  isbn         = {9781424422944},
  keyword      = {STANDARD,VIDEO COMPRESSION},
  language     = {eng},
  location     = {Cairns, Australia},
  pages        = {284--288},
  publisher    = {IEEE},
  title        = {Increased flexibility in inter picture partitioning},
  url          = {http://dx.doi.org/10.1109/MMSP.2008.4665090},
  year         = {2008},
}

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