Digital Paper

A system for encoding EPUB documents into printable barcode sequences for physical storage and offline reconstruction.

What this is

Barcode EPUB is a format transformation pipeline that converts standard EPUB files into a set of 2D barcode tiles.

These tiles can be:

• printed to paper
• stored as images
• distributed physically

The encoded tiles can be scanned and reassembled to reconstruct the original EPUB file.

What you get

Prototype components:

• EPUB → barcode encoder
• Tile-based output (printable image sheets)
• Reader for scan + reconstruction
• Block-level encoding protocol

Output structure

Each document is represented as a collection of tiles:

• fixed-size data blocks
• ordered sequence identifiers
• embedded reconstruction metadata

Example block structure

How it works (high level)

1. Serialization

   EPUB is read as a binary container.

2. Block segmentation

   The byte stream is divided into fixed-size chunks.

3. Encoding

   Each chunk is encoded into a 2D barcode tile.

4. Metadata injection

   Each tile includes:

   • block index
   • total block count
   • protocol identifier
   • optional descriptive metadata

5. Reconstruction

   A reader scans tiles, orders them, and rebuilds the original file.

What makes this different

Most document systems assume:

• continuous digital access
• centralized storage
• file-based transfer

Barcode EPUB operates on:

• discrete physical units
• unordered acquisition
• deterministic reconstruction

It is designed for:

• medium translation (digital ↔ physical)
• offline recovery
• distributed storage in fragments

Use cases

• Physical archival of digital documents
• Offline document transfer
• Redundant storage across distributed media
• Embedding digital payloads in printed material

Constraints

• Lower density than native digital storage
• Requires scanning process for recovery
• Performance scales with number of tiles
• No inherent encryption or access control

Status

Experimental prototype.

Includes:

• encoding pipeline
• draft protocol

About PlaidSheep Lab

Lab projects are exploratory systems that are:

• functional
• stable enough to use
• not productized

They are published for evaluation and potential integration into downstream workflows.

Notes for integrators

Relevant for systems requiring:

• offline data transfer
• physical storage redundancy
• deterministic reconstruction from partial sets

NOTE

Not intended as a general-purpose storage replacement or high-throughput distribution mechanism.