Content for TS 46.060 Word version: 16.0.0
3 Definitions, symbols and abbreviations
4 Outline description
5 Functional description of the encoder
6 Functional description of the decoder
7 Variables, constants and tables in the C-code of the GSM EFR codec
8 Homing sequences
9 Bibliography
$ Change History
3 Definitions, symbols and abbreviations Word‑p. 6
4 Outline description
4.1 Functional description of audio parts
4.2 Preparation of speech samples Word‑p. 12
4.3 Principles of the GSM enhanced full rate speech encoder
4.4 Principles of the GSM enhanced full rate speech decoder Word‑p. 14
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 Word‑p. 15
5.2.1 Windowing and auto-correlation computation
5.2.2 Levinson-Durbin algorithm Word‑p. 16
5.2.3 LP to LSP conversion Word‑p. 17
5.2.4 LSP to LP conversion Word‑p. 18
5.2.5 Quantization of the LSP coefficients Word‑p. 19
5.2.6 Interpolation of the LSPs Word‑p. 20
5.3 Open-loop pitch analysis
5.4 Impulse response computation Word‑p. 21
5.5 Target signal computation
5.6 Adaptive codebook search Word‑p. 22
5.7 Algebraic codebook structure and search Word‑p. 23
5.8 Quantization of the fixed codebook gain Word‑p. 26
5.9 Memory update Word‑p. 27
6 Functional description of the decoder
6.1 Decoding and speech synthesis
6.2 Post-processing Word‑p. 29
6.2.1 Adaptive post-filtering
6.2.2 Up-scaling Word‑p. 30
7 Variables, constants and tables in the C-code of the GSM EFR codec
8 Homing sequences Word‑p. 33
8.1 Functional description
8.2 Definitions
8.3 Encoder homing Word‑p. 35
8.4 Decoder homing
8.5 Encoder home state Word‑p. 36
8.6 Decoder home state Word‑p. 37
9 Bibliography Word‑p. 42
$ Change History Word‑p. 43
