update data structure

README.md

@@ -190,6 +190,34 @@ Takes come in three families: **atomic HOI** (1-3 household tasks, ~3 min), **ch
 continuous activity of ~20-30 min ending with the scene tidied back into order), and **human-scene
 interaction** (whole-body motion and furniture contact, almost no objects, ~5 min).
 
+### Room-scale directory structure
+
+```text
+Room-scale/
+├── Body_shape/
+├── calibration/
+└── Take-xxxxxx/
+    ├── motions/
+    ├── raw/
+    ├── timeline/
+    ├── videos_and_annotations/
+    └── caption/
+```
+
+- `Body_shape/` contains the body-shape beta parameters for each participant.
+- `calibration/` contains calibration data for the OptiTrack system and ZED cameras, together with
+  the scripts used to calculate the Homie calibrations.
+- Each `Take-xxxxxx/` directory contains the data for one take:
+  - `motions/` contains human and object motion data.
+  - `raw/` contains the raw egocentric, exocentric, and motion-capture data.
+  - `timeline/` contains the synchronized timeline for all modalities. Its `annotation.json` file
+    provides `video_keep_interval_s`, which specifies the video intervals to retain after removing
+    footage captured only for synchronization.
+  - `videos_and_annotations/` contains the captured egocentric and exocentric videos at their
+    original resolution, along with annotated videos for the human body, hands, and objects.
+  - `caption/` contains a text description of the take. Caption timestamps refer to the filtered
+    timeline after applying `video_keep_interval_s`.
+
 ## How it was captured
 
 |  | Table-scale | Room-scale |