An FFGL effect that runs the picture through a coder modelled on MiniDisc's ATRAC: a lapped transform on overlapping blocks, coefficients grouped into block floating units with a scale factor and a word length each, and a fixed budget of bits per block shared out by a masking model. Fine texture goes first, hard edges ring one block either side, the allocation shimmers from frame to frame, and a knock (an audio onset, or the button) drains the shock-proof buffer until the picture freezes.
This demo runs the plugin's shaders in your browser, so it needs JavaScript and WebGL2. The plugin itself, its source and its downloads are on its repository.