Digital Subband Video 2 - Open Source Wavelet Codec

[LMP88959]

Hello Doom9, I've released the second iteration of my video codec.

DSV1 wasn't giving me the performance I wanted so I continued work on it and created DSV2.

DSV2 is to DSV1 what H.264 was to MPEG-2. A similar 'generational leap' in terms of efficiency.

As of June 20, 2025 the DSV2 bitstream is frozen.
It is totally free for you to use however you'd like.

Please refer to the GitHub repository for code, examples, and a single-header decoder implementation.

https://github.com/LMP88959/Digital-Subband-Video-2

Description taken from GitHub README:

DSV2 Features

• compression using multiresolution subband analysis instead of DCT
• also known as a wavelet transform
• up to quarter-pixel motion compensation
• 4:1:0, 4:1:1, 4:2:0, 4:2:2 (+ UYVY) and 4:4:4 chroma subsampling formats
• adaptive quantization
• in-loop filtering
• intra and inter frames with variable length closed GOP
• no bidirectional prediction (also known as B-frames). Only forward prediction with previous picture as reference

Improvements and New Features since DSV1

• in-loop filtering after motion compensation
• more adaptive quantization potential
• skip blocks for temporal stability
• new subband filters + support for adaptive subband filtering
• better motion compensation through Expanded Prediction Range Mode (EPRM)
• quarter pixel compensation
• psychovisual optimizations in the codec and encoder design