Crate speech_prep 

speech-prep

Speech-focused audio preprocessing for Rust.

• Voice activity detection (dual-metric: energy + spectral flux)
• Audio format detection plus WAV decoding to 16kHz mono PCM
• Preprocessing (DC removal, high-pass filter, noise reduction, normalization)
• Speech-aligned chunking with overlap handling
• Quality assessment metrics

Usage

use std::sync::Arc;
use speech_prep::{NoopVadMetricsCollector, VadConfig, VadDetector, VadMetricsCollector};

let config = VadConfig::default();
let metrics: Arc<dyn VadMetricsCollector> = Arc::new(NoopVadMetricsCollector);
let detector = VadDetector::new(config, metrics)?;

let audio_samples = vec![0.0; 16_000];
let _segments = detector.detect(&audio_samples)?;

Re-exports

pub use buffer::AudioBuffer;

pub use buffer::AudioBufferMetadata;

pub use chunker::ChunkBoundary;

pub use chunker::Chunker;

pub use chunker::ChunkerConfig;

pub use chunker::ProcessedChunk;

pub use error::Error;

pub use error::Result;

pub use pipeline::AudioPipelineCoordinator;

pub use pipeline::ProcessingResult;

pub use pipeline::StageLatencies;

pub use preprocessing::DcHighPassFilter;

pub use preprocessing::HighpassOrder;

pub use preprocessing::NoiseReducer;

pub use preprocessing::NoiseReductionConfig;

pub use preprocessing::PreprocessingConfig;

pub use preprocessing::VadContext;

pub use time::AudioDuration;

pub use time::AudioTimestamp;

pub use types::AudioChunk;

pub use vad::NoopVadMetricsCollector;

pub use vad::SpeechChunk;

pub use vad::VadConfig;

pub use vad::VadDetector;

pub use vad::VadMetricsCollector;

Modules

buffer

Audio buffer types for batch audio processing.

chunker

Audio chunking aligned to VAD segments.

converter

High-level audio format conversion pipeline.

error

Error types for speech-prep.

format

Audio format detection and metadata extraction for the audio pipeline.

pipeline

End-to-end audio processing coordinator.

preprocessing

Audio preprocessing module for clean, analysis-ready audio.

time

Stream-relative time types for audio processing.

types

Core types for audio processing.

vad

Voice Activity Detection (VAD) with dual-metric analysis.

Structs

VADStats

VAD statistics snapshot.