1 Background
2
Overview of ADPCM algorithms
3
Principles of Recommendations G.726 and G.727 and COM XVIII-102
3.1 Adaptive Prediction and Reconstruction of the Signal
3.2 Adaptive Quantizer
3.3 Quantizer Scale Factor Adaptation
3.4 Adaptation Speed Control
4
Principles of COM XVIII-101
4.1 Prediction
4.2 The Fixed AR Filter
4.3 Adaptive AR Filter
4.4 Update Equations
4.5 Quantizer Adaptation
5
ADPCM Decoder
5.1 General Description
5.2 Synchronous Coding Adjustment
6
Objective Evaluation of ADPCM
6.1 Theoretical Background
6.2 Performance of the ADPCM Algorithms for Voiceband Data
6.3 Objective Measurements
7
Subjective Evaluation of ADPCM
7.1 Subjective Evaluation of 32 kbit/s ADPCM
7.2 Subjective Evaluation of G.721 Extensions
7.3 Subjective Evaluation of Embedded ADPCM
Appendix I
References