When Teacher Catalina stared at the spectrogram dancing on the screen, her fingertips tapped the table out of habit. The central air conditioner in the office buzzed, and the sound of the group next door discussing algorithm optimization was like water-soaked cotton, suffocating in the air. Only the three monitors in front of her were dazzlingly bright - on the left was the original short video to be tested, in the middle was pixel analysis disassembled frame by frame, and on the right were dense parameter windows suspended, with red and green warning lines twitching like nerve endings.
