Efficiency of closed and open-loop scalable wavelet based video coding

  • Authors:

  • M. F. López;V. G. Ruiz;I. García

  • Affiliations:

  • Dept. Computer Architecture and Electronics, University of Almería, Almería, Spain;Dept. Computer Architecture and Electronics, University of Almería, Almería, Spain;Dept. Computer Architecture and Electronics, University of Almería, Almería, Spain

  • Venue:
  • ACIVS'07 Proceedings of the 9th international conference on Advanced concepts for intelligent vision systems
  • Year:
  • 2007

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Abstract

Video compression techniques can be classified into scalable and non-scalable. Scalable coding is more suitable in variable bandwidth scenarios because it improves the quality of the reconstructed video. On the other hand, the scalability has a cost in terms of coding efficiency and complexity. This paper describes a JPEG2000-and-MCTF-based fully scalable video codec (FSVC) and analyzes a set of experiments to measure the cost of the scalability, comparing two different FSVC encoders: open-loop FSVC and closed-loop FSVC. In the open-loop version of FSVC, the encoder uses the original images to make the predictions. The closed-loop scheme generates the predictions with reference images identical to those obtained by the decoder at a given bitrate. Numerical and visual results demonstrate a small loss of the coding efficiency for the open-loop scheme. Moreover, the inclusion of the closed-loop increases the complexity of the encoder and produces poor performance at high bitrates.