1
Scope
2 References
3 Definitions
4 Abbreviations and acronyms
5 Conventions
6 General description of the
coder
6.1 Encoder
6.2 Decoder
6.3 Coder
modes
6.4 Bit
allocation
6.5 Algorithmic
delay
6.6 Computational
complexity and storage requirements
6.7 Coder description
6.8 Transcoding between
different modes, and legacy G.711
7 Functional description of the
encoder
7.1 Pre‑processing high‑pass filter
7.2 Analysis QMF
7.3 Lower‑band
encoding
7.4 MDCT
7.5 Higher‑band encoding (Layer 2)
8 Functional description of the
decoder
8.1 Embedded lower‑band
PCM decoder
8.2 Higher‑band
decoder (Layer 2)
8.3 Inverse MDCT and
overlap‑add
8.4 Lower‑band FERC
8.5 Higher‑band FERC
8.6 Synthesis QMF
8.7 Noise gate
9 Description of the transmitted
parameter indices
10 Bit‑exact description of
the G.711.1 codec
10.1 Use of the simulation
software
10.2 Organization of the
simulation software
Annex A – Floating-point implementation
A.1 Algorithmic
description
A.2 ANSI C code
Annex B – G.711.1 usage in H.245
B.1 Scope
B.2 Packet structure for G.711.1 frames
B.3 G.711.1 capability definitions for H.245
B.4 Interoperability with G.711
Appendix I – Lower‑band
postfiltering for R1 mode
I.1 Windowing and FFT
I.2 PSD of the
quantization noise
I.3 Postfilter
computation
I.4 Time domain
postfiltering (time OLS with interpolation)
I.5 Amplitude
modification control
I.6 Bit-exact description
of the postfilter Electronic attachment – Floating-point reference
implementation
– Associated test vectors