Digital Subband Video 2 - Open Source Wavelet Codec

[LMP88959]

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

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

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

DSV2 is to DSV1 what MPEG-4 Part 2 was to MPEG-2. A similar 'generational leap' in terms of efficiency.


Comparison video (you can see a couple more comparisons in the README of the repository):
minih264:
https://github.com/user-attachments/...7-ba6b66a98d59
DSV2:
https://github.com/user-attachments/...f-74cb59e05333

It is totally free for you to use however you'd like.


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
• 4:1:1, 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
• only form of entropy coding is interleaved exponential-golomb coding for simplicity

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