| Variant | Description | Typical Use | |---------|-------------|-------------| | | Two full‑resolution images placed side‑by‑side, each halved horizontally (e.g., 3840×1080 → 1920×1080 per eye). | Consumer 3D TVs, gaming consoles, YouTube 3D uploads. | | SBS (Half‑Width) / “Top‑Bottom” (optional) | Each eye image is compressed both horizontally and vertically (quarter‑resolution) and placed side‑by‑side. | Mobile VR (Google Cardboard, low‑bandwidth streaming). |