Unlike The Original Series , which was finished on film, DS9 was shot on 35mm film but to save costs on visual effects. This means that while the original film reels exist, the finished product only exists in a low-resolution, 480i format. To create a true 4K master, CBS would have to re-edit every episode and re-render every CGI shot from scratch—a multi-million dollar project they’ve deemed financially unviable. The 2020 Breakthrough: Enter AI Upscaling
The AI upscaling process has generally produced good results, with some minor inconsistencies. Some scenes look exceptionally good, with detailed textures and crisp lines. However, there are instances where the upscale process has introduced minor artifacts, such as halos or ringing around objects. These issues are relatively rare, though, and don't detract from the overall viewing experience. star+trek+deep+space+9+s01+ai+upscale+4k+2020+better
Complicating matters, the wormhole changed. Navigational sensors detected minute perturbations in the Bajoran wormhole's pattern of transit quanta. The Prophets — if such things could be measured with linear instruments — had always been uncooperative with the logic of machines. Sisko had lived through their silence. Now, as if echoing the tensions on the station, the wormhole shimmered with unfamiliar harmonics, producing short bursts of interference that glitched out replicators and distorted simple comm messages. Stationside astronomers, including a skeptical science team from the Collective, argued over cause: was it a natural cycle, or something reacting to the presence of the Collective’s equipment? Unlike The Original Series , which was finished
Here's a comprehensive guide related to "Star Trek: Deep Space Nine" with a focus on AI upscale to 4K resolution in 2020 and beyond: The 2020 Breakthrough: Enter AI Upscaling The AI
The Quest for 4K: The 2020 AI Upscale Revolution of Star Trek: Deep Space Nine