Yes, the technique is general. Take a QR code and do the same manipulations and you get 2x scanning speed and 4x redundancy with no change in the algorithm. I'

Yes, the technique is general. Take a QR code and do the same manipulations and you get 2x scanning speed and 4x redundancy with no change in the algorithm. I've actually improved it significantly since then, where it's possible to also store 2^8 data in something resembling a QR code, while keeping the same scanning speed as today.