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

Description

Contributor guide

Tech stack

cpp

Domain

backend

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

5

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

over 1 week

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

unclear

Prerequisites

JPEG compressionLepton internalsC++

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

10

Research direction

Investigate how Lepton currently handles AC coefficients and prediction. Look at the relevant source files in the Lepton repository, particularly the encoding/decoding modules. Review the two comments on the issue for any additional context. Determine if compressing residuals of AC coefficients and predicted values is feasible and what changes would be required.