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Conditional Coding and Variable Bitrate for Practical Learned Video Coding (2104.09103v2)
Published 19 Apr 2021 in cs.NE, eess.IV, and eess.SP
Abstract: This paper introduces a practical learned video codec. Conditional coding and quantization gain vectors are used to provide flexibility to a single encoder/decoder pair, which is able to compress video sequences at a variable bitrate. The flexibility is leveraged at test time by choosing the rate and GOP structure to optimize a rate-distortion cost. Using the CLIC21 video test conditions, the proposed approach shows performance on par with HEVC.