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arXiv:1711.03951cs.MM

Predicting Chroma from Luma in AV1

Luc N. Trudeau, Nathan E. Egge, David Barr

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Abstract

Chroma from luma (CfL) prediction is a new and promising chroma-only intra predictor that models chroma pixels as a linear function of the coincident reconstructed luma pixels. In this paper, we present the CfL predictor adopted in Alliance Video 1 (AV1), a royalty-free video codec developed by the Alliance for Open Media (AOM). The proposed CfL distinguishes itself from prior art not only by reducing decoder complexity, but also by producing more accurate predictions. On average, CfL reduces the BD-rate, when measured with CIEDE2000, by 5% for still images and 2% for video sequences.

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8 pages
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DOI
Subjects
cs.MMMultimedia

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  1. Show HN: A luma dependent chroma compression algorithm (image compression) 1 comment

    • You talk about an algorithm. However, you never visited any of the practical implementations of Chroma from Luma, which is used in Production. It is part of the AV1/2 video codec; for instance, it has been widely adopted too since 2018. https://arxiv.org/pdf/1711.03951 So do…

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