digital_video_introduction VS jpeg-xl

There's a great introduction to video tech, including codecs, at https://github.com/leandromoreira/digital_video_introduction

A couple of AV centric scenarios I'd explore: - Set up two speakers fed with a mono signal, flip the phase on one and have students move around the area. From this introduce constructive and destructive interference and some basic acoustics. - Using an oscilloscope (or just prepped graphics) show a sine wave on an unbalanced line, how this is paired with an inverted copy of itself on a balanced line, and how this works to cancel transmission noise. - With an analogue signal now pictured, introduce analogue to digital conversion and what sample rate and bit depth mean. From this you can also start to introduce why gain staging is important in both pure analogue systems and those where you're bouncing between analogue and digital domains. - Introduce video: colour channels, different ways of representing colour and some (very surface level) compression basics like chroma subsampling. Really good resource for that here. - Introduce base patterns for getting any signals arounds: dedicated circuits (analogue audio, HDMI video, RS-232 control, logic IO) and network based (again for audio, video, and control). Dive intro signal flow, how to read a schematic and where reasoning about each of these modes differs.

If you want to keep digging from there, get familiar with the compression on NVX, JPEG-XS, and how it behaves. intoPIX are the upstream vendor that do some of the NVX internals and have some great resources on that here: https://www.intopix.com/jpeg-xs. For a guide on all things digital video I also highly recommend https://github.com/leandromoreira/digital_video_introduction.

Edit: After finishing writing the comment, I realized that it was more technical than I intended, and assumes that the reader has a basic to medium understanding of video compression. If not, I recommend this writeup/tutorial of digital video, especially the section about frame types.

A good high-level breakdown of H.264: https://sidbala.com/h-264-is-magic/

Associated HN post (although there have been a few): https://news.ycombinator.com/item?id=30710574

More technical: https://github.com/leandromoreira/digital_video_introduction...

For those interested in this topic, I highly recommend the approachable but more extensive technical introduction at https://github.com/leandromoreira/digital_video_introduction

Go look at this. https://github.com/leandromoreira/digital_video_introduction

shit i did not know that.. does it also work well with wordpress etc? because the only downfall of avif is bunch of extra steps on a nginx to get it to work right.. Also, u/LITUATUI 's comment, do i just change avif to jpeg-xl? i found something but didnt fully finish reading yet https://github.com/ImageMagick/jpeg-xl

One of the most interesting things to me is that JPEG-XL is under an open Patent License, unlike the original JPEG.

https://en.wikipedia.org/wiki/JPEG_XL

Also, Google contributed quite a bit to it's development. As the patent grants show:

https://github.com/ImageMagick/jpeg-xl/blob/main/PATENTS

https://github.com/libjxl/libjxl/blob/main/PATENTS

Microsoft seemed to have gotten a patent on part of it's implementation (which Google also tried to get). Not sure if Google will pay to invalidate that patent, but I have a feeling they are more likely to defend AVIF.

https://www.theregister.com/2022/02/17/microsoft_ans_patent/

Google's control is a little concerning, but I do feel there are bigger fish to fry then choosing between two free formats. Like H.264 and H.265 patents.