sub-byte 0.0.0

Encodes and decodes sequences of integers with known widths, and sequences of symbols equivalent to integers under some mapping.

Sub_Byte

Encodes and decodes sequences of integers with known widths (and sequences of symbols equivalent to integers under some mapping).

Overview

Sub_byte crams as many symbols into each byte as possible using simple bit packing, crossing byte boundaries if necessary, utilising a known fixed bit width for each symbol. These bit widths and the total number of symbols, must be associated with the encoded data as meta data.

Implementations

Python

Calculate a cache of data in Python.

Javascript

Decode a cache of data in Javascript, even in browser.

Alternatives

A bespoke protocol using custom width integer types

Up to 8 u1s (bits), up to 4 u2s, or up to 2 u3s or u4s per byte. Each developer must create their own implementation and tests. Interoperability between different private implementations is untestable.

Protocol buffers

Encodes max symbol per byte. Variable byte encoding - uses continuation bits.

Zipping (data compression)

• Exploits statistical distributions (e.g. "E" being more common in English text than "Q") and patterns.
• Unstructured until the end user unzips the archive.