Table of Contents - P.501 (04/2025) - Test signals for use in telephony and other speech-based applications

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
4	Abbreviations and acronyms
5	Conventions
6	Overview of test signals and typical applications
7	Types of test signals
	7.1	Non-speech-like (fully artificial) signals
	7.2	Speech-like signals
	7.3	Speech signals
	7.4	Additional languages
Annex A – Test signals for terminal coupling loss tests
Annex B – Speech files and noise sequences
	B.1	General
	B.2	Description of the recording procedure used for speech signals
	B.3	Test sentences
	B.4	Noise sequences
Annex C – Speech files prepared for use with ITU-T P.800 conformant applications and perceptual-based objective speech quality prediction
	C.1	General
	C.2	Test sentences
Annex D – Speech files composed of a pair of sentences spoken by a male and a female speaker
	D.1	General
	D.2	Test sentences
Annex E – Representative short speech sample for technical measurements
	E.1	General
	E.2	Description
Appendix I – Description of the processing applied to the speech signals in clause 7.3
	I.1	Filter for DC removal
	I.2	Creation of the single-talk speech sequence
	I.3	Example high-pass filter designs
Appendix II – ITU-T P.863 results on ITU-T P.501 and ITU-T P.565 speech samples
	II.1	Reference speech samples in ITU-T P.501 Annex C and Annex D
	II.2	Processing and scoring of speech samples for offline reference conditions
	Page
	II.3	ITU-T P.863 scores on Annex C and Annex D samples on offline reference conditions
	II.4	ITU-T P.863.1 average scores on Annex C samples
	II.5	Results obtained with the speech sample from [b-ITU-T P.565.1]
	II.6	Summary
Bibliography