ETS 300 726 : 20002
Current
The latest, up-to-date edition.
DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+) - ENHANCED FULL RATE (EFR) SPEECH TRANSCODING
Hardcopy , PDF
English
Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
3.1 Definitions
3.2 Symbols
3.3 Abbreviations
4 Outline description
4.1 Functional description of audio parts
4.2 Preparation of speech samples
4.3 Principles of the GSM enhanced full rate
speech encoder
4.4 Principles of the GSM enhanced full rate
speech decoder
4.5 Sequence and subjective importance of encoded
parameters
5 Functional description of the encoder
5.1 Pre-processing
5.2 Linear prediction analysis and quantization
5.3 Open-loop pitch analysis
5.4 Impulse response computation
5.5 Target signal computation
5.6 Adaptive codebook search
5.7 Algebraic codebook structure and search
5.8 Quantization of the fixed codebook gain
5.9 Memory update
6 Functional description of the decoder
6.1 Decoding and speech synthesis
6.2 Post-processing
7 Variables, constants and tables in the C-code
of the GSM EFR codec
7.1 Description of the constants and variables
used in the C code
8 Homing sequences
8.1 Functional description
8.2 Definitions
8.3 Encoder homing
8.4 Decoder homing
8.5 Encoder home state
8.6 Decoder home state
9 Bibliography
Annex A (informative): Document change history
History
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