International organisation for standardisation organisation internationale de normalisation

Complexity assessment (2)

(Chaired by A. Vetro)

14.1.1.1.1.1.1.1.22JCT3V-G0114 AHG 10: Complexity Assessment on Illumination Compensation (IC) [G. G. Lee, B.-S. Li, C.-F. Chen, Z.-H. Yu, C.-H. Huang (NCKU)]

This proposal provides a case study of complexity assessment on illumination compensation (IC) in 3D-HEVC and complexity metrics, including number of operations, data storage requirement, and data transfer rate are assessed. The analyzed results in this proposal might be considered as anchor complexity to assist JCT3V in evaluating the proposals.

This proposal also presents the experimental results without IC coding tools. The results reveal that the coding performance will be degraded without IC in HTM-9.0r1 configuration and the coding loss is 0.6%, 0.6%, and 0.4% for video PSNR vs. video bit rate, video PSNR vs. total bit rate, and synth PSNR vs. total bit rate, respectively, at HTM-9.0r1 configuration without IC.

14.1.1.1.1.1.1.1.23JCT3V-G0208 AHG10: Complexity assessment of motion compensation process [T. Ikai (Sharp)] [late]

This proposal reports a complexity assessment of motion compensation process, especially considering the worst case. 3D-HEVC enhances motion compensation process by introducing Sub-block, VSP, ARP and IC methods. This evaluation is carried out by spreadsheet in terms of number of operation and data transfer rate. It is reported that the simplification techniques for the tools, such as horizontal only motion comp in VSP, is useful to reduce the worst case complexity to be comparable to HEVC version1. It is recommended to retain these simplification techniques and keep complexity in check for further development.

It is reported that VSP is relatively low in terms of computation and bandwidth, ARP incurs a higher bandwidth relative to HEVC v1, and that MC+IC is slightly higher than 8x8 MC in HEVC v1. Notable increases are observed when certain constraints in the current design are relaxed.

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