Upscalers and lag: retro consoles on a modern TV

In short: Retro consoles deliver 240p/480i, modern TVs need HDMI and often scale poorly and slowly themselves; upscalers such as RetroTINK, OSSC or Framemeister convert with low delay.

In more detail: The problem: old consoles send low resolutions with interlacing (240p/480i/576i), modern TVs (HDMI, 1080p/4K) deinterlace and scale with processing time: picture washed out, delayed, artefacts. An external upscaler solves this.

In Depth

Understanding lag

• Input latency: time from button press to picture. Tube ≈ 0, modern TV without game mode 50 to 100 ms+; with game mode 10–20 ms.
• Causes: deinterlacing, scaling, picture enhancements (noise filter, motion smoothing), HDMI handshake.
• Measuring: lag testers, camera method, online tools.
• Rhythm/platform games show clearly beyond 2–3 frames.
• Emulation: additional latency (run-ahead in RetroArch, USB controllers).

Upscalers and converters

• OSSC (Open Source Scan Converter): open source, lag-free (line mode), SCART/component/VGA → HDMI, no deinterlacing progress, but clean (pixel-exact, scanline options).
• RetroTINK 2X/5X/4K: convenient, composite/S-Video/RGB, low latency, filters (scanlines).
• Framemeister XRGB-Mini: good scaling, more latency (settings!).
• Cheap converters (composite → HDMI): inexpensive, often delay, poor colour, but usable for casual players.
• HDMI mods/FPGA consoles (Analogue Pocket/Mega Sg, MiSTer): hardware re-implementation, exact reproduction, digital output.
• Capture cards (recording) have their own latency, not for playing.

Settings on the TV

• Enable game mode; picture enhancers off (noise reduction, motion smoothing, sharpness).
• Aspect ratio: 4:3 for old games (original), avoid overscan/zoom (“Just Scan”/“Pixel Mapping”).
• Pixel-perfect/integer scaling: whole-number magnification avoids blur.
• Scanlines/CRT filters optional for tube charm; BFI reduces motion blur (OLED).
• Check colour profile and gamma.
• Line doubling (240p → 480p) works better than interlace deinterlacing.
• Cable quality (SCART/RGB) remains important.

Recommendation by budget

• Casual players: modern TV with game mode + usable composite/SCART→HDMI converter; realistic expectations.
• Enjoyment/accuracy: RetroTINK + RGB-SCART cable, optionally OSSC.
• Purists: CRT + original cables.
• Comfort: mini/MiSTer consoles, emulation with shaders.
• Care: good cables, power supply for mods, warranty/used purchase.
• Prices for upscalers are sometimes high (€100–250); weigh costs against playing time.
• When buying watch for authenticity (counterfeit devices).

See also: Retro video connections, CRT TVs, HDMI