Unified 20-Task Suite

The public Xperience-10M sample task surface is one unified set of 20 tasks. Tasks 1-12 are the original public-sample tasks. Tasks 13-20 are additional sample-supported tasks attached to the same window, split, feature, baseline, and leakage-control contract.

Historical artifact paths containing tier2_task_suite are kept for stable links, but they should be read as the result directory for tasks 13-20, not as a separate benchmark tier.

Shared Setup

Episode scope: 1 public sample episode.
Frames/windows: 5,821 frames and 1,161 aligned windows.
Windowing: 20 frames per window, stride 5 frames.
Feature vector: 8,546 dimensions from the shared feature manifest.
Split: chronological 70/30 train/test by time within the sample episode.
Baselines: minimal interpretable heads and compact neural MLP heads.
Raw data: MP4/HDF5/RRD files are not redistributed.

Task Table

#	Task	Artifact id	Origin	Input -> output	Primary metric	Minimal	Neural
1	Action Recognition	`timeline_action`	original task	20-frame multimodal window -> current action class	macro-F1 (higher better)	0.0500	0.0148
2	Procedure Step Recognition	`timeline_subtask`	original task	20-frame multimodal window -> current procedure step	macro-F1 (higher better)	0.0506	0.0281
3	Action Boundary Detection	`transition_detection`	original task	current window with boundary target -> boundary or steady	macro-F1 (higher better)	0.6118	0.5862
4	Next-Action Prediction	`next_action`	original task	current window at time t -> action at t+20 frames	macro-F1 (higher better)	0.0593	0.0419
5	Hand Trajectory Forecasting	`hand_trajectory_forecast`	original task	current multimodal window -> future hand-joint trajectory	MPJPE (lower better)	0.8647	0.1079
6	Contact State Prediction	`contact_prediction`	original task	non-contact, non-caption features -> contact or no contact	macro-F1 (higher better)	1.0000	1.0000
7	Object Relevance Prediction	`object_relevance`	original task	non-caption multimodal features -> relevant object set	micro-F1 (higher better)	0.1803	0.1679
8	Language Grounding	`caption_grounding`	original task	text-like query and candidate windows -> ranked matching moments	MRR (higher better)	0.0160	0.0168
9	Cross-Modal Retrieval	`cross_modal_retrieval`	original task	motion/IMU/pose query; depth/video candidates -> ranked visual windows	MRR (higher better)	0.2693	0.1300
10	Cross-Modal Reconstruction	`modality_reconstruction`	original task	motion, IMU, and camera/pose features -> reconstructed depth/video vector	R2 (higher better)	-0.0153	-0.0102
11	Temporal Order Verification	`temporal_order`	original task	two adjacent windows plus difference vector -> correct or reversed	F1 (higher better)	0.5400	0.8520
12	Multimodal Synchronization Detection	`misalignment_detection`	original task	motion-side and visual/depth-side feature groups -> aligned or shifted	F1 (higher better)	0.5052	0.7153
13	Long-Horizon Next-Action Forecasting	`long_horizon_next_action`	additional task	Current 20-frame non-caption multimodal window. -> Action label five seconds later.	macro-F1 (higher better)	0.0750	0.0655
14	Long-Horizon Next-Subtask Forecasting	`next_subtask_forecast`	additional task	Current 20-frame non-caption multimodal window. -> Procedure subtask label five seconds later.	macro-F1 (higher better)	0.0455	0.0507
15	Interaction Text Prediction	`interaction_text_prediction`	additional task	Current 20-frame sensor window with caption-text features removed. -> Raw annotation interaction phrase for the same window.	macro-F1 (higher better)	0.0444	0.0381
16	Action-Object Relation Prediction	`action_object_relation`	additional task	Current 20-frame sensor window with caption-text features removed. -> Joint action plus active object-set relation.	macro-F1 (higher better)	0.0000	0.0000
17	Future Object-Set Forecasting	`object_set_forecast`	additional task	Current 20-frame sensor window with caption-text features removed. -> Object set active five seconds later.	micro-F1 (higher better)	0.1694	0.1972
18	IMU-to-Hand Pose Reconstruction	`imu_to_hand_pose`	additional task	Current IMU acceleration/gyroscope feature block only. -> Current left/right hand joint feature blocks.	MAE (lower better)	0.0420	0.0426
19	Camera-View Synchronization Retrieval	`camera_view_sync_retrieval`	additional task	Fisheye camera-1 feature query projected into fisheye camera-3 feature space. -> The synchronized held-out camera-3 window.	MRR (higher better)	0.4943	0.2409
20	Time-to-Next-Transition Regression	`time_to_transition`	additional task	Current 20-frame non-caption multimodal window. -> Frames until the next action-label boundary, capped at 200 frames.	MAE frames (lower better)	10.5374	10.5545

Machine-Readable Copy

The JSON mirror is docs/data/task_suite_20.json.