Course Code: IP1403
This course looks at different types of voice coder used in GSM and UMTS networks and then investigates its basic operation looking at CELP and VSELP.
The course progresses to look at the functionality of the AMR voice codec and suggest its benefits and looks at Source Controlled Rate (SCR) operation finishes by looking at lost frame substitution.
Attendees of this course should require an understanding of the key voice coders used in modern telecommunication networks, as well as their development and operation. This course will be of particular relevance to those interested in the performance of different speech codecs for optimising voice through the network.
Delegates should have experience or an interest in mobile networks otherwise there are no prerequisites for this course.
Voice Coding
Linear Predictive Coders (LPCs)
The GSM Vocoder
Vocoder Action
RPE
Vocoder Output
GSM Coder and Decoder
Subjective Division of Codec Parameters
Categorization
The GSM Half-Rate Speech Coder
Code Excited Linear Predictor (CELP)
GSM Enhanced Full Rate Speech Coder
Adaptive Multi-Rate (AMR) Voice Codec
General Description
Source Controlled Rate (SCR) Operation
Lost Frame Substitution
