ETS 300 175-8 : 20002
Current
The latest, up-to-date edition.
RADIO EQUIPMENT AND SYSTEMS (RES); DIGITAL EUROPEAN CORDLESS TELECOMMUNICATIONS - COMMON INTERFACE - SPEECH CODING AND TRANSMISSION
Hardcopy , PDF
English
Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Configurations
4.1 Reference configuration
4.2 Test configurations
5 Encoding
5.1 32 kbit/s full term (ADPCM)
5.2 Other codings
6 Transmission aspects
6.1 Relative level
6.2 Acoustic reference level
6.3 Volume control
7 Speech performance characteristics
7.1 PP frequency responses
7.2 PP sending and receiving loudness ratings
7.3 Sidetone
7.4 Terminal coupling loss
7.5 Distortion
7.6 Out of band signals
7.7 Noise
7.8 Acoustic shock
7.9 Delay
7.10 Network echo control
7.11 PP ambient noise rejection
8 Additional features
8.1 Loud speaking and hand-free facilities
8.2 Tandem with mobile radio network
8.3 DECT connected to the GSM fixed network
8.4 Wireless Relay Stations (WRS)
Annex A (informative): Description of "reference"
echo control devices
Annex B (informative): Local loop application
Annex C (informative): GSM Discontinuous Transmission
(DTX), and Voice Activity Detection (VAD)
Annex D (informative): Speech levels in relation to
ambient room noise and examples of adaptive
volume control settings
Annex E (informative): Bibliography
History
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.