batgre/conversational-dynamics-egocom

Conversational Dynamics — EgoCom

Derived temporal annotations and model-ready training anchors for conversational-dynamics and turn-taking research, generated from EgoCom.

This dataset is produced by the conversational-dynamics-data pipeline. The underlying objective is to expose conversational data in a representation suitable for temporal and action-conditioned models:

state_t + action_t → future conversational state

Contents

Three configurations are provided.

model_ready

One row per candidate temporal anchor. It contains the metadata required to reconstruct past context and future prediction windows without materializing millions of overlapping sequences.

Important fields include:

• recording_id
• conversation_id
• split
• anchor_idx
• anchor_time
• max_context_steps
• future_steps
• context_valid_ratio
• future_valid_ratio
• future_event_count
• sample_class
• is_trainable
• schema versions

action_grid

The underlying regular temporal representation used by the anchors.

The current prototype operates at:

10 Hz
100 ms per timestep

with focal vocal states:

SPEAKING
SILENT
UNKNOWN

and vocal actions:

NO_EVENT
ONSET
OFFSET

Invalid or semantically unsupported transitions are masked rather than replaced with artificial labels.

media_manifest

One row per recording, mapping the canonical recording_id to its raw media without shipping the media:

column	meaning
dataset, recording_id	unique key; recording_id equals the action grid's
video_path	video file, relative to the corpus root
audio_path	separate audio file, relative to the corpus root, or null
media_offset_s	media_time_s = decision_time_s + media_offset_s
video_has_audio	the video container carries an audio stream

Paths are relative to the corpus root: the directory holding EgoCom's 240p/ folder (e.g. 240p/20min/<recording_id>.MP4). Join them with your own local copy of the corpus; no absolute path is stored. audio_path is null when the corpus ships no separate audio file: decode the audio track of the video (video_has_audio is true for every recording in this release). For EgoCom the recording clock is the video's own, so media_offset_s is 0.

Loading

Model-ready anchors:

from datasets import load_dataset

anchors = load_dataset(
    "batgre/conversational-dynamics-egocom",
    "model_ready",
)

Temporal action grid:

grid = load_dataset(
    "batgre/conversational-dynamics-egocom",
    "action_grid",
)

model_ready exposes native train, validation and test splits:

train = load_dataset(
    "batgre/conversational-dynamics-egocom", "model_ready", split="train"
)
validation = load_dataset(
    "batgre/conversational-dynamics-egocom", "model_ready", split="validation"
)
test = load_dataset(
    "batgre/conversational-dynamics-egocom", "model_ready", split="test"
)

action_grid has a single train split: it is not a set of supervised examples but the complete canonical trajectory the anchors point into.

The split column is kept inside each partition. It is redundant with the file the row lives in, and that is the point: it makes the partitioning a checkable invariant rather than an implicit convention.

Anchors versus trainable anchors

Every partition contains all candidate anchors of its split, including those whose validity ratios fall below the pipeline's thresholds. Use is_trainable to keep only the ones the pipeline considers usable:

split	anchors	of which is_trainable
train	1 088 761	1 072 231
validation	86 268	85 003
test	209 436	205 722

The counts in metadata.json refer to the is_trainable subset.

Temporal semantics

An anchor at timestep t represents a possible prediction point. A downstream model may reconstruct:

context = [t - L + 1, ..., t]
future  = [t + 1, ..., t + H]

The anchor belongs to the context; prediction starts at t + 1.

For the current release:

minimum context: 1 s
maximum context: 5 s
future horizon:  1 s
grid frequency:  10 Hz

Context length is intentionally not fixed by the dataset.

To reconstruct a window, keep the action_grid rows whose recording_id matches the anchor, order them by decision_index, and take the rows around decision_index == anchor_idx.

Splits

Splits are assigned at the conversation level rather than at the anchor level. This prevents synchronized or otherwise related recordings from the same conversation from leaking across training and evaluation splits.

Original dataset splits are preserved when available; split_source records whether an assignment came from the original release or from the pipeline's deterministic seeded fallback.

Provenance and reproducibility

The accompanying metadata.json records the dataset-generation contract and provenance information, including relevant schema versions, temporal geometry, validity thresholds, counts, source checksums and pipeline lineage.

The generating code is maintained separately in the conversational-dynamics-data GitHub repository.

Source data

This repository contains derived temporal annotations only. It does not redistribute EgoCom raw videos or audio; media_manifest only references them by corpus-relative path.

Users requiring the original source media should obtain EgoCom separately and comply with its original terms and licence.

Scope

This release currently represents the vocal state/action layer. The temporal backbone is intended to support additional aligned conversational information in future releases, including audio, visual, gaze, pose, addressee and other multimodal signals.

Model architectures, training loops, sampling strategies and evaluation code are intentionally maintained outside this dataset repository.