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Leveraging the quantization offset for improved requantization transcoding of H.264/AVC video

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Abstract
Requantization transcoding is a method for reducing the bit rate of compressed video bitstreams. Most research on re-quantization is concerned with the architectural design, the selection of a suitable quantizer, or the reduction of requantization errors. In this paper, we propose to incorporate a new dimension in requantization transcoding: the quantization offset. We compare two requantization methods: increasing the quantization step size and decreasing the quantization offset. Furthermore, we propose a novel heuristic for requantization transcoding based on a theoretical rate-distortion analysis. The experimental results for H.264/AVC video show that requantization is improved in rate-distortion sense with gains up to 1 dB for open-loop requantization of B pictures compared to requantization with fixed quantization offset.
Keywords
requantization, H.264/AVC, signal processing, transcoding

Citation

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Chicago
Notebaert, Stijn, Jan De Cock, Kenneth Vermeirsch, Peter Lambert, and Rik Van de Walle. 2009. “Leveraging the Quantization Offset for Improved Requantization Transcoding of H.264/AVC Video.” In PCS: 2009 PICTURE CODING SYMPOSIUM, 29–32. New York, NY, USA: IEEE.
APA
Notebaert, Stijn, De Cock, J., Vermeirsch, K., Lambert, P., & Van de Walle, R. (2009). Leveraging the quantization offset for improved requantization transcoding of H.264/AVC video. PCS: 2009 PICTURE CODING SYMPOSIUM (pp. 29–32). Presented at the 27th Picture Coding Symposium, New York, NY, USA: IEEE.
Vancouver
1.
Notebaert S, De Cock J, Vermeirsch K, Lambert P, Van de Walle R. Leveraging the quantization offset for improved requantization transcoding of H.264/AVC video. PCS: 2009 PICTURE CODING SYMPOSIUM. New York, NY, USA: IEEE; 2009. p. 29–32.
MLA
Notebaert, Stijn, Jan De Cock, Kenneth Vermeirsch, et al. “Leveraging the Quantization Offset for Improved Requantization Transcoding of H.264/AVC Video.” PCS: 2009 PICTURE CODING SYMPOSIUM. New York, NY, USA: IEEE, 2009. 29–32. Print.
@inproceedings{835281,
  abstract     = {Requantization transcoding is a method for reducing the bit rate of compressed video bitstreams. Most research on re-quantization is concerned with the architectural design, the selection of a suitable quantizer, or the reduction of requantization errors. In this paper, we propose to incorporate a new dimension in requantization transcoding: the quantization offset. We compare two requantization methods: increasing the quantization step size and decreasing the quantization offset. Furthermore, we propose a novel heuristic for requantization transcoding based on a theoretical rate-distortion analysis. The experimental results for H.264/AVC video show that requantization is improved in rate-distortion sense with gains up to 1 dB for open-loop requantization of B pictures compared to requantization with fixed quantization offset.},
  author       = {Notebaert, Stijn and De Cock, Jan and Vermeirsch, Kenneth and Lambert, Peter and Van de Walle, Rik},
  booktitle    = {PCS: 2009 PICTURE CODING SYMPOSIUM},
  isbn         = {9781424445936},
  keyword      = {requantization,H.264/AVC,signal processing,transcoding},
  language     = {eng},
  location     = {Chicago, IL, USA},
  pages        = {29--32},
  publisher    = {IEEE},
  title        = {Leveraging the quantization offset for improved requantization transcoding of H.264/AVC video},
  year         = {2009},
}

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