Complexity-Aware High Efficiency Video Coding by Guilherme Corrêa Pedro Assunção Luciano Agostini & Luis A. Silva Cruz

Author:Guilherme Corrêa, Pedro Assunção, Luciano Agostini & Luis A. Silva Cruz
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(2)Instituto de Telecomunicações (IT) Instituto Politécnico de Leiria, Leiria, Portugal

(3)Instituto de Telecomunicações (IT) Dep. Eng. Electrotécnica e de Computadores Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Coimbra, Portugal

This chapter presents a set of methods which were developed with the goal of dynamically scaling the computational complexity required by HEVC in the encoding process [1–8]. All of them rely on constraining the frame partitioning structures introduced by the standard, namely, the CUs and the PUs, in order to adjust the number of R-D evaluations performed in the optimisation process and consequently the encoding computational complexity.1

By using the proposed algorithms, the encoding computational complexity can be downscaled by up to 50 % with negligible R-D performance losses and down to 20 % of the unconstrained complexity with larger losses.2 The levels of performance degradation observed when applying these complexity scaling methods are acceptable in many applications and in power-constrained devices where some sort of encoding complexity reduction methods have to be applied.

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