id: https://nde.nl/ontology/hc/class/VideoAudioAnnotation
name: video_audio_annotation_class
title: Video Audio Annotation Class
imports:
- linkml:types
- ./VideoAnnotation
- ./VideoTimeSegment
- ./AudioEventSegment
- ../slots/has_or_had_segment
- ../slots/has_audio_quality_score
- ../slots/has_or_had_provenance
- ./Provenance
- ./ConfidenceScore
- ../slots/is_or_was_diarized
- ./DiarizationStatus
- ../slots/temporal_extent
- ./TimeSpan
- ../slots/start_of_the_start
- ../slots/end_of_the_end
- ./Timestamp
- ../slots/contains_or_contained
- ./Speaker
- ../slots/has_or_had_identifier
- ./Identifier
- ../slots/has_or_had_label
- ./Label
- ../slots/has_clipping
- ../slots/is_background
- ../slots/is_overlapping
- ../slots/languages_detected
- ../slots/music_confidence
- ../slots/music_detected
- ../slots/music_end_seconds
- ../slots/music_genre
- ../slots/music_genres_detected
- ../slots/music_segment_confidence
- ../slots/has_or_had_music_segment
- ../slots/music_start_seconds
- ../slots/music_type
- ../slots/noise_floor_db
- ../slots/has_or_had_type
- ../slots/segment_confidence
- ../slots/segment_end_seconds
- ../slots/segment_language
- ../slots/segment_start_seconds
- ../slots/contains_or_contained
- ../slots/silence_total_seconds
- ../slots/snr_db
- ../slots/contains_or_contained
- ../slots/sound_events_detected
- ../slots/speaker_count
- ../slots/speaker_id
- ../slots/speaker_label
- ../slots/specificity_annotation
- ../slots/speech_detected
- ../slots/speech_language
- ../slots/speech_language_confidence
- ../slots/contains_or_contained
- ../slots/speech_text
- ../slots/has_or_had_score
- ./VideoAudioAnnotation
- ./SpecificityAnnotation
- ./TemplateSpecificityScore
- ./TemplateSpecificityType
- ./TemplateSpecificityTypes
- ../slots/contains_or_contained
- ./AudioEventSegment
- ../enums/AudioEventTypeEnum
- ../enums/SoundEventTypeEnum
- ../enums/MusicTypeEnum
prefixes:
  linkml: https://w3id.org/linkml/
  hc: https://nde.nl/ontology/hc/
  schema: http://schema.org/
  dcterms: http://purl.org/dc/terms/
  prov: http://www.w3.org/ns/prov#
  crm: http://www.cidoc-crm.org/cidoc-crm/
  oa: http://www.w3.org/ns/oa#
  ma: http://www.w3.org/ns/ma-ont#
  wd: http://www.wikidata.org/entity/
default_prefix: hc
classes:
  VideoAudioAnnotation:
    is_a: VideoAnnotation
    class_uri: hc:VideoAudioAnnotation
    abstract: false
    description: "Annotation for audio events detected in video content.\n\n**DEFINITION**:\n\nVideoAudioAnnotation captures structured information derived from audio\nanalysis of video content. This includes speech, music, silence, and\nvarious sound events.\n\n**AUDIO ANALYSIS TYPES**:\n\n| Type | Description | Use Case |\n|------|-------------|----------|\n| **Speech Detection** | Identify spoken segments | Transcript alignment |\n| **Speaker Diarization** | Who spoke when | Interview navigation |\n| **Music Detection** | Identify musical segments | Content classification |\n| **Sound Events** | Applause, laughter, etc. | Audience engagement |\n| **Silence Detection** | Find quiet segments | Quality assessment |\n| **Language Detection** | Identify spoken languages | Multilingual content |\n\n**SPEAKER DIARIZATION**:\n\nDiarization answers \"who spoke when\":\n\n```\n0:00-0:15  Speaker 1 (Curator)\n0:15-0:45  Speaker 2 (Artist)\n0:45-1:00  Speaker 1 (Curator)\n1:00-1:30  Speaker 3 (Museum\
      \ Director)\n```\n\nHeritage applications:\n- Navigate to specific speakers in interviews\n- Count speaking time per person\n- Identify unnamed speakers for annotation\n- Build speaker databases for recognition\n\n**MUSIC DETECTION**:\n\nMusic detection classifies audio segments as containing music:\n\n| Category | Examples |\n|----------|----------|\n| **Background music** | Documentary soundtracks |\n| **Featured music** | Concert recordings, performances |\n| **Historical music** | Archival recordings |\n| **Licensed music** | Rights-managed content |\n\nMusic segments may also include:\n- Genre classification (classical, jazz, folk)\n- Mood/tempo analysis\n- Fingerprinting for identification\n\n**SOUND EVENT DETECTION**:\n\nNon-speech, non-music audio events:\n\n| Event Type | Heritage Context |\n|------------|------------------|\n| APPLAUSE | Lecture recordings, openings |\n| LAUGHTER | Tour guides, educational content |\n| CROWD_NOISE | Event documentation |\n| DOOR/FOOTSTEPS\
      \ | Ambient archive recordings |\n| NATURE_SOUNDS | Outdoor heritage site recordings |\n| MACHINERY | Industrial heritage, conservation |\n\n**LANGUAGE DETECTION**:\n\nMultilingual heritage content requires language identification:\n\n```yaml\ncontains_or_contained:\n  - start: 0.0\n    end: 120.0\n    language: nl\n    speaker_id: speaker_001\n  - start: 120.0\n    end: 240.0\n    language: en\n    speaker_id: speaker_001  # Same speaker, switched language\n```\n\n**AUDIO QUALITY ANALYSIS**:\n\nAudio quality metrics for preservation and accessibility:\n\n| Metric | Description | Threshold |\n|--------|-------------|-----------|\n| SNR | Signal-to-noise ratio | > 20 dB good |\n| Clipping | Peak distortion | None ideal |\n| Noise floor | Background noise level | < -50 dB good |\n| Frequency response | Bandwidth | Full-range ideal |\n\n**HERITAGE INSTITUTION USE CASES**:\n\n| Content Type | Audio Analysis Need |\n|--------------|---------------------|\n| Oral histories | Diarization,\
      \ transcription alignment |\n| Curator interviews | Speaker identification, language |\n| Virtual tours | Background music, voiceover detection |\n| Lecture recordings | Audience reactions, Q&A segments |\n| Conservation videos | Narration vs demonstration audio |\n| Archival footage | Speech recovery, noise reduction |\n\n**RELATIONSHIP TO VideoTranscript**:\n\nVideoAudioAnnotation is complementary to VideoTranscript:\n\n- **VideoTranscript**: The text content of speech (WHAT was said)\n- **VideoAudioAnnotation**: Audio structure (WHO spoke, music, sounds)\n\nTogether they provide complete audio understanding:\n\n```\nVideoAudioAnnotation: Speaker 1 spoke 0:00-0:15\nVideoTranscript: \"Welcome to the Rijksmuseum...\" (0:00-0:15)\n\u2192 Combined: Curator said \"Welcome to the Rijksmuseum...\"\n```\n"
    exact_mappings:
    - hc:VideoAudioAnnotation
    close_mappings:
    - ma:AudioTrack
    - crm:E13_Attribute_Assignment
    related_mappings:
    - wikidata:Q11028
    - wikidata:Q638
    slots:
    - has_or_had_segment
    # - contains_or_contained - DUPLICATE REMOVED
    - has_audio_quality_score
    - is_or_was_diarized
    # - contains_or_contained - DUPLICATE REMOVED
    - has_clipping
    - languages_detected
    - music_confidence
    - music_detected
    - music_genres_detected
    - has_or_had_music_segment
    - noise_floor_db
    - has_or_had_type
    # - contains_or_contained - DUPLICATE REMOVED
    - silence_total_seconds
    - snr_db
    # - contains_or_contained - DUPLICATE REMOVED
    - sound_events_detected
    - speaker_count
    - speaker_label
    - specificity_annotation
    - speech_detected
    - speech_language
    - speech_language_confidence
    - contains_or_contained
    - has_or_had_score
    slot_usage:
      has_or_had_segment:
        description: 'MIGRATED from audio_event_segments (Rule 53).

          Audio event segments detected in the video content.

          '
        range: AudioEventSegment
        multivalued: true
        required: false
        inlined_as_list: true
        examples:
        - value: '[{has_or_had_type: SPEECH, start_seconds: 0.0, end_seconds: 15.0, segment_text: "Speech detected - Speaker 1", confidence: 0.95}]'
          description: Speech detection segment
        - value: '[{has_or_had_type: MUSIC, start_seconds: 30.0, end_seconds: 60.0, segment_text: "Background classical music", confidence: 0.88}]'
          description: Music detection segment
      contains_or_contained:
        range: DiarizationSegment
        multivalued: true
        required: false
        inlined_as_list: true
        examples:
        - value:
            temporal_extent:
              begin_of_the_begin: 0.0
              end_of_the_end: 15.0
            contains_or_contained:
              has_or_had_identifier: spk_001
              has_or_had_label: Curator
          description: Curator speaking for first 15 seconds
      speaker_count:
        range: integer
        required: false
        minimum_value: 0
        examples:
        - value: 3
          description: Three distinct speakers detected
      speaker_label:
        range: string
        multivalued: true
        required: false
        examples:
        - value: '[Curator, Artist, Museum Director]'
          description: Three identified speakers
      music_detected:
        range: boolean
        required: false
        examples:
        - value: true
          description: Music present in video
      has_or_had_music_segment:
        range: MusicSegment
        multivalued: true
        required: false
        inlined_as_list: true
        examples:
        - value: '[{start_seconds: 0.0, end_seconds: 30.0, music_type: ''BACKGROUND'', genre: ''classical''}]'
          description: Classical background music
      music_genres_detected:
        range: string
        multivalued: true
        required: false
        examples:
        - value: '[classical, baroque]'
          description: Classical and baroque music detected
      music_confidence:
        range: float
        required: false
        minimum_value: 0.0
        maximum_value: 1.0
        examples:
        - value: 0.88
          description: High confidence music detection
      sound_events_detected:
        range: boolean
        required: false
        examples:
        - value: true
          description: Sound events detected
      # contains_or_contained:
      #   range: SoundEventTypeEnum
      #   multivalued: true
      #   required: false
      #   examples:
      #   - value: '[APPLAUSE, CROWD_NOISE]'
      #     description: Applause and crowd sounds detected
      # contains_or_contained:
      #   range: VideoTimeSegment
      #   multivalued: true
      #   required: false
      #   inlined_as_list: true
      #   examples:
      #   - value: '[{start_seconds: 45.0, end_seconds: 48.0}]'
      #     description: 3-second silence
      silence_total_seconds:
        range: float
        required: false
        minimum_value: 0.0
        examples:
        - value: 15.5
          description: 15.5 seconds of total silence
      noise_floor_db:
        range: float
        required: false
        examples:
        - value: -45.0
          description: Good quality, moderate noise floor
      has_audio_quality_score:
        range: float
        required: false
        minimum_value: 0.0
        maximum_value: 1.0
        examples:
        - value: 0.85
          description: High audio quality
      snr_db:
        range: float
        required: false
        examples:
        - value: 25.0
          description: Good signal-to-noise ratio
      has_clipping:
        range: boolean
        required: false
        examples:
        - value: false
          description: No clipping detected
    comments:
    - Audio event detection for video content
    - Supports speech, music, silence, and sound event detection
    - Speaker diarization for interview navigation
    - Language detection for multilingual heritage content
    - Audio quality metrics for preservation assessment
    see_also:
    - https://www.w3.org/TR/annotation-model/
    - https://arxiv.org/abs/2111.08085
    annotations:
      specificity_score: 0.1
      specificity_rationale: Generic utility class/slot created during migration
      custodian_types: "['*']"
      custodian_types_rationale: Universal utility concept
  SpeechSegment:
    class_uri: hc:SpeechSegment
    description: 'A speech segment with speaker and language information.


      Extends VideoTimeSegment with speech-specific metadata.

      '
    slots:
    - segment_confidence
    - segment_end_seconds
    - segment_language
    - segment_start_seconds
    - speaker_id
    - speaker_label
    - specificity_annotation
    - speech_text
    - has_or_had_score
    slot_usage:
      segment_start_seconds:
        range: float
        required: true
        minimum_value: 0.0
      segment_end_seconds:
        range: float
        required: true
        minimum_value: 0.0
      speaker_id:
        range: string
        required: false
      speaker_label:
        range: string
        required: false
      segment_language:
        range: string
        required: false
      segment_confidence:
        range: float
        required: false
        minimum_value: 0.0
        maximum_value: 1.0
      speech_text:
        range: string
        required: false
  DiarizationSegment:
    class_uri: hc:DiarizationSegment
    description: 'A diarization segment identifying speaker and time boundaries.


      Focused on "who spoke when" rather than transcript content.

      '
    slots:
    - has_or_had_provenance
    - temporal_extent
    - contains_or_contained
    - is_overlapping
    - specificity_annotation
    - has_or_had_score
    slot_usage:
      temporal_extent:
        description: Time range of the diarization segment.
        range: TimeSpan
        inlined: true
        required: true
      contains_or_contained:
        description: Speaker identified in this segment.
        range: Speaker
        inlined: true
        required: true
      has_or_had_provenance:
        description: Provenance metadata including confidence score.
        range: Provenance
        inlined: true
        required: false
      is_overlapping:
        range: boolean
        required: false
  MusicSegment:
    class_uri: hc:MusicSegment
    description: 'A segment of detected music with classification.

      '
    slots:
    - is_background
    - music_end_seconds
    - music_genre
    - music_segment_confidence
    - music_start_seconds
    - music_type
    - specificity_annotation
    - has_or_had_score
    slot_usage:
      music_start_seconds:
        range: float
        required: true
        minimum_value: 0.0
      music_end_seconds:
        range: float
        required: true
        minimum_value: 0.0
      music_type:
        range: MusicTypeEnum
        required: false
      music_genre:
        range: string
        required: false
      music_segment_confidence:
        range: float
        required: false
        minimum_value: 0.0
        maximum_value: 1.0
      is_background:
        range: boolean
        required: false