SPro

This file documents the SPro toolkit for speech signal processing, for SPro release 4.0.

1. Introduction		What is SPro?
2. Speech analysis techniques		Basics of speech analysis techniques
3. The SPro tools		The SPro user manual
4. The SPro library		The SPro programmer manual
5. Quick reference guide
6. Changes		Changes in SPro
A. GNU Free Documentation License
Index

 -- The Detailed Node Listing ---

Introduction

1.1 What is SPro?		What is SPro good for?
1.2 How to read this manual?		How to read this document?
1.3 Installing SPro		SPro installation
1.4 Reporting bugs
1.5 Contributors		People who contributed

Speech analysis techniques

2.1 Pre-emphasis and windowing		Short term windows and pre-emphasis
2.2 Variable resolution spectral analysis
2.3 Filter-bank analysis		Filter-bank speech analysis
2.4 Linear predictive analysis		Linear prediction speech analysis
2.5 Cepstral analysis
2.6 Deltas and normalization		Delta, acceleration and feature normalization

The SPro tools

3.1 File formats		Waveform and feature file formats
3.2 Common options		Tools common options
3.3 I/O via stdin and stdout		Standard input, standard output and pipes
3.4 Extracting features		Feature extraction with SPro
3.5 Manipulating feature streams		The scopy utility for manipulating feature streams

File formats

3.1.1 Waveform streams		Supported input waveform file formats
3.1.2 Feature streams		Output feature file format

Common options

3.2.1 I/O options		Common I/O options
3.2.2 Waveform framing options		Common frame blocking options
3.2.3 Feature vector options		Common feature vector extraction options
3.2.4 Miscellaneous options		More common options

Extracting features

3.4.1 Filter-bank analysis tools		Tools for filter-bank derived features
3.4.2 LPC analysis tools		Tools for linear prediction derived features

Filter-bank analysis tools

Filter-bank log-magnitude features		All about sfbank
Filter-bank cepstral features		All about sfbcep
Options		sfbank and sfbcep options

LPC analysis tools

Linear prediction coefficients		All about slpc
Linear prediction cepstrum		All about slpcep
Options		slpc and slpcep options

Manipulating feature streams

3.5.1 Operations on feature streams		Maniuplating feature streams with scopy
3.5.2 Exporting features		Exporting features to alien formats with scopy
3.5.3 Importing from a previous SPro release		Compatibility questions
3.5.4 Copy options		scopy options

The SPro library

4.1 Waveform streams		Functions related to waveforms
4.2 Feature description flags		Describing feature vector contents
4.3 Feature streams		Reading and writing features
4.4 Storing features without streams		I/O with feature buffers
4.5 Feature conversion		Adding delta features, CMS, etc...
4.6 FFT-based functions		FFT analysis functions
4.7 LPC-based functions		LPC analysis functions
4.8 Miscellaneous functions		Whatever could not go anywhere else

Waveform streams

4.1.1 Memory allocation		Memory allocation for waveforms
4.1.2 Opening streams		Opening waveform streams for reading
4.1.3 Reading frames		Reading frames from a waveform stream
4.1.4 Computing frame energy

Feature streams

4.3.1 Opening feature streams		Opening feature streams for I/O
4.3.2 Reading and writing feature vectors		Reading features from and writing features to streams
4.3.3 Seeking into a stream		Access a particular frame in a stream

Opening feature streams

Conversion flags		Dynamically converting features at I/O time
Opening for I/O		Open a feature stream
Accessing stream attributes		What's the stream dimension, frame rate, etc...

Storing features without streams

4.4.1 Buffer allocation		Allocating memory for a buffer
4.4.2 Accessing buffer elements		Accessing vectors in a buffer
4.4.3 Buffer I/O		Reading and writing buffers to disk
4.4.4 Buffers and streams		Direct access to stream buffers (not recommended)

FFT-based functions

4.6.1 Fourier transform		Fast Fourier transform of a signal
4.6.2 Filter-bank		Filter-bank integration
4.6.3 Cosine transform		Discrete Cosine Transform

LPC-based functions

4.7.1 Linear prediction		Computing linear prediction coefficients
4.7.2 LPC conversion		Conversions between LPC, LAR, PARCOR and LSF

Quick reference guide

5.1 sfbank		sfbank reference
5.2 sfbcep		sfbcep reference
5.3 slpc		slpc reference
5.4 slpcep		slpcep reference
5.5 scopy		scopy reference

sfbank

Usage		Syntax
Synopsis		Brief description
Options

sfbcep

Usage		Syntax
Synopsis		Brief description
Options

slpc

Usage		Syntax
Synopsis		Brief description
Options

slpcep

Usage		Syntax
Synopsis		Brief description
Options

scopy

Usage		Syntax
Synopsis		Brief description
Options

Changes

6.1 History		The history of SPro
6.2 Changes from previous version		What's new from the previous version?
6.3 Compatibility		Is th current version compatible with the previous one?