dropbox/lepton

why not compress the residulals of ac coefficients and predicted values?

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#106 opened on Apr 20, 2018

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help wanted

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Description

can we improve compression rate by compress the residulals of ac coefficients and its predicted values?

Contributor guide

Research direction
Investigate how Lepton currently encodes AC coefficients and explore predictive coding methods to compress residuals. Review related literature or existing implementations.
Tech stack
cpp
Domain
backenddataperformance
Issue type
Research
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
JPEG compression basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60