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icassp2027-experiment/prepare_easycom_eot_int_review.py
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Python

#!/usr/bin/env python3
"""Generate wearer-centric EasyCom EOT/INT candidates for AI and human review.
This stage never changes EasyCom speech boundaries and never claims semantic
ground truth. It emits every wearer transition plus independent participant-
resolved hard-negative regions. All timing thresholds are CLI parameters, and
raw evidence is retained for DeepSeek pre-labeling and human correction.
"""
from __future__ import annotations
import argparse
from collections import Counter, defaultdict
from dataclasses import asdict, dataclass
import json
from pathlib import Path
import random
from typing import Any, Iterable, Sequence
from derive_easycom_interaction_events import (
CAMERA_WEARER_ID, SOURCE_FPS, Clip, Rules, Utterance, build_clips,
is_lexical_feedback, is_pure_nonverbal, load_utterances,
)
from easycom_manifest import ALL_SESSIONS, TEST_SESSIONS
SCHEMA_VERSION = 2
PROTOCOL_VERSION = "easycom-wearer-centric-eot-int-candidates-v2"
@dataclass(frozen=True)
class CandidateConfig:
context_seconds: float = 3.0
relation_window_seconds: float = 3.0
same_speaker_pause_max_seconds: float = 2.0
other_handover_max_seconds: float = 1.5
short_vocalization_max_seconds: float = 1.0
continuation_min_seconds: float = 0.4
@dataclass(frozen=True)
class ProtocolCandidate:
schema_version: int
protocol_version: str
uid: str
event_id: str
session: str
split: str
task: str
event_type: str
candidate_source: str
rule_candidate_type: str
automatic_protocol_label: str
automatic_hard_negative_type: str | None
automatic_confidence: str
anchor_type: str
anchor_dense_frame: int
anchor_dense_seconds: float
event_time: float
region_start_seconds: float
region_end_seconds: float
clip_stem: str
source_start_frame: int
previous_other_participant_ids: tuple[int, ...]
incoming_other_participant_ids: tuple[int, ...]
temporal_evidence: dict[str, Any]
speaker_timeline: tuple[dict[str, Any], ...]
context: tuple[dict[str, Any], ...]
automatic_reason: str
ai_verdict: None = None
ai_event_type: None = None
ai_subtype: None = None
ai_confidence: None = None
ai_reason: None = None
human_status: str = "UNREVIEWED"
human_verdict: None = None
human_event_type: None = None
human_subtype: None = None
exclude_reason: None = None
def _fill_states(rows: Sequence[Utterance], *, segment_start: int, segment_end: int,
wearer_id: int) -> tuple[bytearray, bytearray]:
length = segment_end - segment_start
wearer, others = bytearray(length), bytearray(length)
for row in rows:
left = max(segment_start, row.dense_start_frame) - segment_start
right = min(segment_end, row.dense_end_frame_exclusive) - segment_start
if right <= left:
continue
target = wearer if row.participant_id == wearer_id else others
target[left:right] = b"\x01" * (right - left)
return wearer, others
def _run_after(state: bytearray, index: int, value: bool) -> int:
end = index
while end < len(state) and bool(state[end]) == value:
end += 1
return end - index
def _run_before(state: bytearray, index: int, value: bool) -> int:
start = index - 1
while start >= 0 and bool(state[start]) == value:
start -= 1
return index - start - 1
def _all_state(state: bytearray, start: int, stop: int, value: bool) -> bool:
left, right = max(0, start), min(len(state), stop)
return right > left and all(bool(state[i]) == value for i in range(left, right))
def _active_other_ids(rows: Sequence[Utterance], frame: int, *, wearer_id: int) -> tuple[int, ...]:
return tuple(sorted({
row.participant_id for row in rows
if row.participant_id != wearer_id
and row.dense_start_frame <= frame < row.dense_end_frame_exclusive
}))
def _clip_for_frame(clips: Sequence[Clip], frame: int) -> Clip | None:
return next((clip for clip in clips
if clip.dense_start_frame <= frame < clip.dense_start_frame + clip.num_frames), None)
def _context_rows(rows: Sequence[Utterance], *, frame: int, context_frames: int,
wearer_id: int) -> tuple[dict[str, Any], ...]:
left, right = frame - context_frames, frame + context_frames
return tuple({
"uid": row.uid,
"participant_id": row.participant_id,
"participant_role": "wearer" if row.participant_id == wearer_id else "other",
"start_seconds": row.dense_start_seconds,
"end_seconds": row.dense_end_seconds,
"duration_seconds": row.duration_seconds,
"transcription": row.transcription,
"target_of_speech": list(row.target_of_speech),
} for row in rows
if row.dense_end_frame_exclusive > left and row.dense_start_frame < right)
def _relation_evidence(rows: Sequence[Utterance], *, frame: int, wearer_id: int,
window_frames: int) -> dict[str, Any]:
previous = [row for row in rows if row.participant_id != wearer_id
and row.dense_end_frame_exclusive <= frame
and frame - row.dense_end_frame_exclusive <= window_frames]
following = [row for row in rows if row.participant_id != wearer_id
and row.dense_start_frame >= frame
and row.dense_start_frame - frame <= window_frames]
prev = max(previous, key=lambda row: row.dense_end_frame_exclusive, default=None)
nxt = min(following, key=lambda row: row.dense_start_frame, default=None)
active_rows = [row for row in rows if row.participant_id != wearer_id
and row.dense_start_frame < frame < row.dense_end_frame_exclusive]
overlapping = sorted({row.participant_id for row in active_rows})
resumes = [] if prev is None else [row for row in following if row.participant_id == prev.participant_id]
resumed = min(resumes, key=lambda row: row.dense_start_frame, default=None)
nearby_onsets = [row for row in rows if row.participant_id != wearer_id
and abs(row.dense_start_frame - frame) <= window_frames]
closest_onset = min(nearby_onsets, key=lambda row: abs(row.dense_start_frame - frame), default=None)
return {
"previous_speaker_id": None if prev is None else prev.participant_id,
"previous_speaker_offset_seconds": None if prev is None else prev.dense_end_seconds,
"gap_from_previous_speaker_offset_seconds": (
None if prev is None else (frame - prev.dense_end_frame_exclusive) / SOURCE_FPS),
"overlapping_other_ids": overlapping,
"other_overlap_at_event_seconds": max(
[0.0] + [(row.dense_end_frame_exclusive - frame) / SOURCE_FPS for row in active_rows]
),
"next_speaker_id": None if nxt is None else nxt.participant_id,
"next_other_onset_seconds": None if nxt is None else nxt.dense_start_seconds,
"previous_speaker_resumes": resumed is not None,
"previous_speaker_resume_delay_seconds": (
None if resumed is None or prev is None
else (resumed.dense_start_frame - prev.dense_end_frame_exclusive) / SOURCE_FPS
),
"closest_other_onset_relative_seconds": (
None if closest_onset is None else (closest_onset.dense_start_frame - frame) / SOURCE_FPS
),
}
def _candidate(*, session: str, task: str, source: str, rule_type: str,
anchor_type: str, frame: int, region_start: int, region_end: int,
label: str, subtype: str | None, previous_ids: tuple[int, ...],
incoming_ids: tuple[int, ...], evidence: dict[str, Any], clips: Sequence[Clip],
rows: Sequence[Utterance], wearer_id: int, context_frames: int,
reason: str) -> ProtocolCandidate | None:
clip = _clip_for_frame(clips, frame)
if clip is None:
return None
participant_key = "prev-" + ("-".join(f"p{x}" for x in previous_ids) or "none")
participant_key += "__in-" + ("-".join(f"p{x}" for x in incoming_ids) or "none")
uid = f"{session}/{source.lower()}/{frame:08d}/{participant_key}"
context = _context_rows(rows, frame=frame, context_frames=context_frames, wearer_id=wearer_id)
return ProtocolCandidate(
schema_version=SCHEMA_VERSION, protocol_version=PROTOCOL_VERSION,
uid=uid, event_id=uid, session=session,
split="test" if session in TEST_SESSIONS else "train", task=task,
event_type=source.lower(), candidate_source=source, rule_candidate_type=rule_type,
automatic_protocol_label=label, automatic_hard_negative_type=subtype,
automatic_confidence="rule_candidate", anchor_type=anchor_type,
anchor_dense_frame=frame, anchor_dense_seconds=frame / SOURCE_FPS,
event_time=frame / SOURCE_FPS, region_start_seconds=region_start / SOURCE_FPS,
region_end_seconds=region_end / SOURCE_FPS, clip_stem=clip.stem,
source_start_frame=frame - clip.dense_start_frame + 1,
previous_other_participant_ids=previous_ids,
incoming_other_participant_ids=incoming_ids, temporal_evidence=evidence,
speaker_timeline=context, context=context, automatic_reason=reason,
)
def derive_protocol_candidates(utterances: Sequence[Utterance], clips: Sequence[Clip], *,
session: str, wearer_id: int = CAMERA_WEARER_ID,
config: CandidateConfig | None = None,
window_seconds: float | None = None,
context_seconds: float | None = None) -> list[ProtocolCandidate]:
"""Return every wearer transition and independent hard-negative regions."""
cfg = config or CandidateConfig()
values = asdict(cfg)
if window_seconds is not None:
values["relation_window_seconds"] = window_seconds
if context_seconds is not None:
values["context_seconds"] = context_seconds
cfg = CandidateConfig(**values)
if any(value < 0 for value in asdict(cfg).values()) or cfg.relation_window_seconds == 0:
raise ValueError("candidate timing parameters must be non-negative and relation window positive")
context_frames = round(cfg.context_seconds * SOURCE_FPS)
relation_frames = round(cfg.relation_window_seconds * SOURCE_FPS)
pause_frames = round(cfg.same_speaker_pause_max_seconds * SOURCE_FPS)
handover_frames = round(cfg.other_handover_max_seconds * SOURCE_FPS)
short_frames = round(cfg.short_vocalization_max_seconds * SOURCE_FPS)
continuation_frames = round(cfg.continuation_min_seconds * SOURCE_FPS)
rows_by_segment: dict[int, list[Utterance]] = defaultdict(list)
clips_by_segment: dict[int, list[Clip]] = defaultdict(list)
for row in utterances:
rows_by_segment[row.segment_id].append(row)
for clip in clips:
clips_by_segment[clip.segment_id].append(clip)
candidates: list[ProtocolCandidate] = []
seen: set[tuple[str, int, tuple[int, ...]]] = set()
def add(item: ProtocolCandidate | None, key: tuple[str, int, tuple[int, ...]]) -> None:
if item is not None and key not in seen:
seen.add(key)
candidates.append(item)
for segment_id, segment_clips in sorted(clips_by_segment.items()):
segment_clips.sort(key=lambda clip: clip.dense_start_frame)
rows = sorted(rows_by_segment.get(segment_id, []),
key=lambda row: (row.dense_start_frame, row.dense_end_frame_exclusive, row.uid))
segment_start = segment_clips[0].dense_start_frame
segment_end = segment_clips[-1].dense_start_frame + segment_clips[-1].num_frames
wearer, others = _fill_states(rows, segment_start=segment_start,
segment_end=segment_end, wearer_id=wearer_id)
# A: all wearer 0->1 and 1->0 transitions, without semantic guessing.
for index in range(1, len(wearer)):
frame = segment_start + index
if not wearer[index - 1] and wearer[index]:
evidence = _relation_evidence(rows, frame=frame, wearer_id=wearer_id,
window_frames=relation_frames)
evidence.update(
wearer_speech_duration_after_onset_seconds=_run_after(wearer, index, True) / SOURCE_FPS,
previous_wearer_silence_duration_seconds=_run_before(wearer, index, False) / SOURCE_FPS,
original_timestamp_seconds=frame / SOURCE_FPS,
)
add(_candidate(
session=session, task="eot_response", source="WEARER_ONSET",
rule_type="ENTRY_CANDIDATE", anchor_type="wearer_onset", frame=frame,
region_start=frame, region_end=min(segment_end, frame + relation_frames),
label="unsure", subtype=None,
previous_ids=_active_other_ids(rows, frame - 1, wearer_id=wearer_id),
incoming_ids=_active_other_ids(rows, frame, wearer_id=wearer_id),
evidence=evidence, clips=segment_clips, rows=rows, wearer_id=wearer_id,
context_frames=context_frames,
reason="observed wearer 0->1 transition; semantic EOT-response status is unresolved",
), ("WEARER_ONSET", frame, ()))
elif wearer[index - 1] and not wearer[index]:
evidence = _relation_evidence(rows, frame=frame, wearer_id=wearer_id,
window_frames=relation_frames)
evidence.update(
wearer_speech_duration_before_offset_seconds=_run_before(wearer, index, True) / SOURCE_FPS,
wearer_silence_duration_after_offset_seconds=_run_after(wearer, index, False) / SOURCE_FPS,
active_other_ids_before_offset=list(_active_other_ids(rows, frame - 1, wearer_id=wearer_id)),
active_other_ids_after_offset=list(_active_other_ids(rows, frame, wearer_id=wearer_id)),
original_timestamp_seconds=frame / SOURCE_FPS,
)
add(_candidate(
session=session, task="int_yield", source="WEARER_OFFSET",
rule_type="YIELD_CANDIDATE", anchor_type="wearer_offset", frame=frame,
region_start=max(segment_start, frame - relation_frames),
region_end=min(segment_end, frame + relation_frames), label="unsure", subtype=None,
previous_ids=_active_other_ids(rows, frame - 1, wearer_id=wearer_id),
incoming_ids=_active_other_ids(rows, frame, wearer_id=wearer_id),
evidence=evidence, clips=segment_clips, rows=rows, wearer_id=wearer_id,
context_frames=context_frames,
reason="observed wearer 1->0 transition; semantic INT-yield status is unresolved",
), ("WEARER_OFFSET", frame, ()))
other_rows = [row for row in rows if row.participant_id != wearer_id]
# B1: same speaker pauses and resumes while the wearer remains silent.
by_speaker: dict[int, list[Utterance]] = defaultdict(list)
for row in other_rows:
by_speaker[row.participant_id].append(row)
for participant_id, speaker_rows in by_speaker.items():
for first, resumed in zip(speaker_rows, speaker_rows[1:]):
gap = resumed.dense_start_frame - first.dense_end_frame_exclusive
left = first.dense_end_frame_exclusive - segment_start
right = resumed.dense_start_frame - segment_start
if (gap <= 0 or gap > pause_frames
or not _all_state(wearer, left, right, False)
or not _all_state(others, left, right, False)):
continue
frame = first.dense_end_frame_exclusive
evidence = {
"speaker_id": participant_id, "speaker_offset_seconds": first.dense_end_seconds,
"speaker_resume_seconds": resumed.dense_start_seconds,
"resume_delay_seconds": gap / SOURCE_FPS, "wearer_active_during_pause": False,
"original_timestamp_seconds": frame / SOURCE_FPS,
}
add(_candidate(
session=session, task="eot_response", source="SAME_SPEAKER_PAUSE",
rule_type="EOT_HARD_NEGATIVE_REGION", anchor_type="other_offset", frame=frame,
region_start=frame, region_end=resumed.dense_start_frame,
label="hard_negative", subtype="EOT_MIDTURN_PAUSE",
previous_ids=(participant_id,), incoming_ids=(participant_id,), evidence=evidence,
clips=segment_clips, rows=rows, wearer_id=wearer_id, context_frames=context_frames,
reason="same participant resumes after a configurable pause while wearer stays silent",
), ("SAME_SPEAKER_PAUSE", frame, (participant_id,)))
# B2: participant-resolved non-wearer to non-wearer handover.
for first in other_rows:
options = [row for row in other_rows if row.participant_id != first.participant_id
and row.dense_start_frame >= first.dense_end_frame_exclusive
and row.dense_start_frame - first.dense_end_frame_exclusive <= handover_frames]
if not options:
continue
incoming = min(options, key=lambda row: row.dense_start_frame)
same_resumes = any(row.participant_id == first.participant_id
and first.dense_end_frame_exclusive < row.dense_start_frame <= incoming.dense_start_frame
for row in other_rows)
left = first.dense_end_frame_exclusive - segment_start
right = max(left + 1, incoming.dense_start_frame - segment_start + 1)
if same_resumes or not _all_state(wearer, left, right, False):
continue
frame = first.dense_end_frame_exclusive
evidence = {
"previous_speaker_id": first.participant_id, "incoming_speaker_id": incoming.participant_id,
"previous_offset_seconds": first.dense_end_seconds,
"incoming_onset_seconds": incoming.dense_start_seconds,
"handover_gap_seconds": (incoming.dense_start_frame - frame) / SOURCE_FPS,
"wearer_active_during_handover": False, "original_timestamp_seconds": frame / SOURCE_FPS,
}
add(_candidate(
session=session, task="eot_response", source="OTHER_TO_OTHER",
rule_type="EOT_HARD_NEGATIVE_REGION", anchor_type="other_offset", frame=frame,
region_start=frame, region_end=incoming.dense_start_frame,
label="hard_negative", subtype="EOT_OTHER_TO_OTHER",
previous_ids=(first.participant_id,), incoming_ids=(incoming.participant_id,),
evidence=evidence, clips=segment_clips, rows=rows, wearer_id=wearer_id,
context_frames=context_frames,
reason="participant-level IDs show a non-wearer to non-wearer handover",
), ("OTHER_TO_OTHER", frame, (first.participant_id, incoming.participant_id)))
# B3/B4: other activity ends while the wearer continuously holds and continues the floor.
for other in other_rows:
start = other.dense_start_frame - segment_start
end = other.dense_end_frame_exclusive - segment_start
if (start < 0 or end + continuation_frames > len(wearer)
or not _all_state(wearer, start, end + continuation_frames, True)):
continue
feedback = (other.dense_end_frame_exclusive - other.dense_start_frame <= short_frames
and (is_lexical_feedback(other.transcription) or is_pure_nonverbal(other.transcription)))
source = "OTHER_BACKCHANNEL" if feedback else "NON_TAKEOVER_OVERLAP"
subtype = "INT_OTHER_BACKCHANNEL" if feedback else "INT_NON_TAKEOVER_OVERLAP"
evidence = {
"other_speaker_id": other.participant_id, "other_onset_seconds": other.dense_start_seconds,
"other_offset_seconds": other.dense_end_seconds, "other_duration_seconds": other.duration_seconds,
"wearer_active_through_region": True,
"wearer_continuation_after_other_seconds": continuation_frames / SOURCE_FPS,
"lexical_or_nonverbal_feedback_hint": feedback,
"original_timestamp_seconds": other.dense_start_seconds,
}
add(_candidate(
session=session, task="int_yield", source=source,
rule_type="INT_HARD_NEGATIVE_REGION", anchor_type="other_onset",
frame=other.dense_start_frame, region_start=other.dense_start_frame,
region_end=other.dense_end_frame_exclusive, label="hard_negative", subtype=subtype,
previous_ids=_active_other_ids(rows, other.dense_start_frame - 1, wearer_id=wearer_id),
incoming_ids=(other.participant_id,), evidence=evidence, clips=segment_clips,
rows=rows, wearer_id=wearer_id, context_frames=context_frames,
reason=("short feedback-like other activity ends while wearer holds the floor"
if feedback else "other overlaps but wearer retains and continues the floor"),
), (source, other.dense_start_frame, (other.participant_id,)))
return sorted(candidates, key=lambda row: (row.anchor_dense_frame, row.candidate_source, row.uid))
def stratified_limit(rows: Sequence[ProtocolCandidate], limit: int | None, *, seed: int) -> list[ProtocolCandidate]:
if limit is None or limit >= len(rows):
return list(rows)
if limit < 0:
raise ValueError("--max-candidates must be non-negative")
rng = random.Random(seed)
buckets: dict[tuple[str, str], list[ProtocolCandidate]] = defaultdict(list)
for row in rows:
buckets[(row.session, row.candidate_source)].append(row)
for bucket in buckets.values():
rng.shuffle(bucket)
selected: list[ProtocolCandidate] = []
while len(selected) < limit and any(buckets.values()):
for key in sorted(buckets):
if buckets[key] and len(selected) < limit:
selected.append(buckets[key].pop())
return sorted(selected, key=lambda row: (row.session, row.anchor_dense_frame, row.candidate_source))
def _write_jsonl(path: Path, rows: Iterable[ProtocolCandidate]) -> None:
path.parent.mkdir(parents=True, exist_ok=True)
with path.open("w", encoding="utf-8") as handle:
for row in rows:
handle.write(json.dumps(asdict(row), ensure_ascii=False) + "\n")
def parse_args() -> argparse.Namespace:
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("--dataset-root", type=Path, required=True)
parser.add_argument("--output-dir", type=Path, required=True)
parser.add_argument("--sessions", nargs="+", default=list(ALL_SESSIONS))
parser.add_argument("--camera-wearer-id", type=int, default=CAMERA_WEARER_ID)
parser.add_argument("--context-seconds", type=float, default=3.0)
parser.add_argument("--relation-window-seconds", type=float, default=3.0)
parser.add_argument("--same-speaker-pause-max-seconds", type=float, default=2.0)
parser.add_argument("--other-handover-max-seconds", type=float, default=1.5)
parser.add_argument("--short-vocalization-max-seconds", type=float, default=1.0)
parser.add_argument("--continuation-min-seconds", type=float, default=0.4)
parser.add_argument("--candidate-sources", nargs="+")
parser.add_argument("--max-candidates", type=int)
parser.add_argument("--selection-seed", type=int, default=2027)
return parser.parse_args()
def main() -> None:
args = parse_args()
unknown = sorted(set(args.sessions) - set(ALL_SESSIONS))
if unknown:
raise ValueError(f"Unknown EasyCom sessions: {unknown}")
config = CandidateConfig(
context_seconds=args.context_seconds,
relation_window_seconds=args.relation_window_seconds,
same_speaker_pause_max_seconds=args.same_speaker_pause_max_seconds,
other_handover_max_seconds=args.other_handover_max_seconds,
short_vocalization_max_seconds=args.short_vocalization_max_seconds,
continuation_min_seconds=args.continuation_min_seconds,
)
dataset_root, output_dir = args.dataset_root.expanduser().resolve(), args.output_dir.expanduser().resolve()
all_rows: list[ProtocolCandidate] = []
session_timelines: dict[str, list[dict[str, Any]]] = {}
rules = Rules()
for session in args.sessions:
clips = build_clips(dataset_root, session, rules)
utterances = load_utterances(session, clips)
session_timelines[session] = [{
"uid": row.uid,
"participant_id": row.participant_id,
"participant_role": "wearer" if row.participant_id == args.camera_wearer_id else "other",
"start_seconds": row.dense_start_seconds,
"end_seconds": row.dense_end_seconds,
} for row in utterances]
rows = derive_protocol_candidates(utterances, clips, session=session,
wearer_id=args.camera_wearer_id, config=config)
all_rows.extend(rows)
print(f"{session}: candidates={len(rows)} sources={dict(sorted(Counter(row.candidate_source for row in rows).items()))}")
sources = None if args.candidate_sources is None else set(args.candidate_sources)
eligible = [row for row in all_rows if sources is None or row.candidate_source in sources]
selected = stratified_limit(eligible, args.max_candidates, seed=args.selection_seed)
output_path = output_dir / "easycom_eot_int_candidates.jsonl"
_write_jsonl(output_path, selected)
counts = Counter((row.split, row.candidate_source, row.rule_candidate_type) for row in selected)
summary = {
"schema_version": SCHEMA_VERSION, "protocol_version": PROTOCOL_VERSION, "dataset": "EasyCom",
"semantic_warning": "Rules create candidates only; AI labels need human review and never modify dense activity ground truth.",
"sessions": list(args.sessions), "camera_wearer_id": args.camera_wearer_id,
"candidate_config": asdict(config), "selection_seed": args.selection_seed,
"max_candidates": args.max_candidates,
"candidate_sources": None if sources is None else sorted(sources),
"num_candidates_before_filter": len(all_rows), "num_candidates_before_limit": len(eligible),
"num_candidates_written": len(selected),
"counts": [{"split": key[0], "candidate_source": key[1],
"rule_candidate_type": key[2], "count": value}
for key, value in sorted(counts.items())],
}
output_dir.mkdir(parents=True, exist_ok=True)
(output_dir / "summary.json").write_text(
json.dumps(summary, indent=2, ensure_ascii=False) + "\n", encoding="utf-8")
(output_dir / "easycom_session_timelines.json").write_text(
json.dumps({"schema_version": 1, "sessions": session_timelines}, ensure_ascii=False) + "\n",
encoding="utf-8",
)
print(f"Saved {len(selected)} wearer-centric review candidates to {output_path}")
if __name__ == "__main__":
main()