AI glossary for content assistants
Plain-English definitions of 13,917 AI terms for branded assistant teams.
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13,917 terms. Open one for definitions and related concepts.
MFCC
MFCCs (Mel-Frequency Cepstral Coefficients) are compact audio features derived from mel spectrograms that capture the spectral shape of speech, widely used in traditional speech processing.
Voice Recognition
Voice recognition identifies who is speaking by analyzing unique vocal characteristics, often used interchangeably with speaker recognition.
Speaker Identification
Speaker identification determines which person from a known set of speakers is speaking in an audio recording.
Speaker Verification
Speaker verification confirms whether a speaker is who they claim to be by comparing their voice against a stored voiceprint.
Voiceprint
A voiceprint is a mathematical representation of the unique characteristics of a person's voice used for identification or verification.
Batch Transcription
Batch transcription processes pre-recorded audio files asynchronously, converting them to text without real-time constraints.
Live Captioning
Live captioning generates real-time text captions from spoken audio during live events, meetings, or broadcasts.
Subtitle Generation
Subtitle generation automatically creates timed text overlays for video content using speech recognition and timing algorithms.
Word-Level Timestamp
Word-level timestamps assign precise start and end times to each individual word in a transcription, enabling exact audio-text alignment.
Endpoint Detection
Endpoint detection identifies the start and end of speech utterances in an audio stream, determining when a speaker begins and stops talking.
Hotword Detection
Hotword detection continuously listens for a specific trigger phrase that activates a voice system, also known as wake word detection.
Voice Command
Voice commands are spoken instructions that trigger specific actions in a device or application, enabling hands-free control.
Voice Search
Voice search allows users to perform search queries by speaking instead of typing, using speech recognition to convert spoken queries to text.
Dictation
Dictation converts continuous spoken speech into formatted written text, enabling hands-free document creation and text input.
Whisper Model
Whisper is an open-source speech recognition model from OpenAI trained on 680,000 hours of multilingual audio data.
Distil-Whisper
Distil-Whisper is a distilled version of OpenAI Whisper that runs 6x faster while retaining 99% of the accuracy.
Faster Whisper
Faster Whisper is a reimplementation of OpenAI Whisper using CTranslate2 that delivers up to 4x faster inference with lower memory usage.
Wav2Vec
Wav2Vec is a self-supervised speech representation model from Meta that learns powerful audio features from unlabeled speech data.
HuBERT
HuBERT is a self-supervised speech representation model that learns acoustic units through an offline clustering and prediction approach.
Conformer ASR
Conformer is a speech recognition architecture that combines convolution and transformer layers to capture both local and global audio patterns.
Transducer
A transducer is a sequence-to-sequence model architecture for speech recognition that jointly models acoustic and language information for streaming ASR.
CTC Decoding
CTC (Connectionist Temporal Classification) is a training and decoding technique for speech recognition that handles variable-length alignment between audio and text.
Streaming ASR
Streaming ASR processes audio in real time, producing transcription results incrementally as speech is received rather than waiting for the complete utterance.
Hybrid ASR
Hybrid ASR combines multiple recognition approaches or models to achieve higher accuracy than any single system alone.
Multi-Speaker TTS
Multi-speaker TTS generates speech in multiple distinct voices from a single model, supporting voice selection at inference time.
Zero-Shot TTS
Zero-shot TTS generates speech in a new voice from just a few seconds of reference audio, without any fine-tuning or training on that voice.
Expressive TTS
Expressive TTS generates speech with natural emotion, emphasis, and intonation, going beyond monotone synthesis to convey meaning and feeling.
Emotional TTS
Emotional TTS explicitly controls the emotional tone of synthesized speech, generating audio that conveys specific emotions like happiness, sadness, or anger.
Prosody Control
Prosody control allows fine-grained manipulation of speech rhythm, intonation, stress, and timing in text-to-speech systems.
Pitch Control
Pitch control adjusts the fundamental frequency of synthesized speech, allowing modification of how high or low the voice sounds.
Speaking Rate
Speaking rate controls how fast or slow synthesized speech is delivered, measured in words per minute or as a relative speed factor.
Naturalness
Naturalness measures how human-like and natural synthesized speech sounds, often evaluated through Mean Opinion Score listening tests.
Mean Opinion Score
Mean Opinion Score (MOS) is a standardized subjective quality measure where human listeners rate speech on a 1-5 scale.
ElevenLabs TTS
ElevenLabs is a leading AI voice platform offering high-quality text-to-speech, voice cloning, and voice design capabilities.
Google TTS
Google Text-to-Speech is a cloud-based speech synthesis service offering neural voices across 50+ languages as part of Google Cloud.
Azure Speech
Azure Speech is Microsoft's cloud speech service providing text-to-speech, speech-to-text, speech translation, and custom voice capabilities.
Bark TTS
Bark is an open-source transformer-based text-to-audio model by Suno that generates speech, music, and sound effects from text prompts.
Tortoise TTS
Tortoise TTS is an open-source multi-voice text-to-speech system known for producing extremely high-quality speech at slow generation speeds.
Coqui TTS
Coqui TTS is an open-source text-to-speech toolkit offering multiple TTS architectures and pre-trained models for research and production use.
Piper TTS
Piper is a fast, lightweight open-source TTS system designed for edge devices and offline use, supporting over 30 languages.
StyleTTS
StyleTTS is a speech synthesis approach that uses style diffusion to generate human-level natural speech by modeling style as a latent random variable.
OpenVoice
OpenVoice is an open-source instant voice cloning model that separates voice style from language content for flexible cross-lingual cloning.
Fish Speech
Fish Speech is an open-source multilingual text-to-speech model supporting voice cloning and real-time synthesis across multiple languages.
Voicebot
A voicebot is an AI-powered conversational agent that communicates with users through voice, handling phone calls and voice interactions autonomously.
Intelligent IVR
Intelligent IVR uses AI and natural language understanding to create dynamic, conversational phone menu systems that understand caller intent.
Voice Search Optimization
Voice search optimization adapts content and SEO strategies for voice-based search queries, which tend to be conversational and question-based.
Call Analytics
Call analytics uses AI to extract insights from phone conversations, analyzing content, sentiment, compliance, and performance metrics.
Speech Analytics
Speech analytics analyzes spoken interactions to extract patterns, trends, and insights from voice data across an organization.
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Does InsertChat support voice?
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Is it mobile friendly?
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What's the fastest path to a successful deployment?
Start with one assistant and a small set of high-value sources. Iterate using real questions from analytics.
What is the fastest way to get started?
Create an account. Connect one key source. Ask a test question, brand the assistant, then publish it on one page.