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 ITU-T 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
Modified discrete cosine transform (MDCT)
7.5
Higher‑band encoding (Layer 2)
8 Functional
description of the decoder
8.1
Embedded lower‑band pulse code modulation (PCM) decoder
8.2
Higher‑band decoder (Layer 2)
8.3
Inverse MDCT and overlap and add (OLA)
8.4
Lower‑band frame erasure concealment (FERC)
8.5
Higher‑band FERC
8.6
Synthesis quadrature-mirror filterbank (QMF)
8.7
Noise gate
9
Description of the transmitted parameter indices
10
Bit‑exact description of the ITU-T 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 –
ITU-T G.711.1 usage in ITU-T H.245
B.1 Scope
B.2 Packet
structure for ITU-T G.711.1 frames
B.3 ITU-T
G.711.1 capability definitions for ITU-T H.245
B.4
Interoperability with ITU-T G.711
Annex C – Lossless compression of ITU-T G.711
PCM compatible bitstream in ITU‑T G.711.1
C.1
Scope
C.2
References
C.3
Abbreviations and acronyms
C.4
Conventions
C.5
General description of the ITU-T G.711.1 lossless coding (LLC) coder
C.6 ITU-T G.711.1
LLC encoder
C.7 ITU-T G.711.1 LLC
decoder
C.8
Description of the transmitted parameters
C.9
Bit-exact description of the ITU-T G.711.1 LLC codec
Annex D – Superwideband extension
D.1
Scope
D.2
Normative references
D.3
Abbreviations and acronyms
D.4
Conventions
D.5
General description of the coder
D.6
Functional description of the encoder
D.7
Functional description of the decoder
D.8
Bit-exact description of the ITU-T G.711.1 superwideband extension coder
Annex E – Floating-point implementation of ITU-T
G.711.1 Annex D
E.1
Algorithmic description
E.2
ANSI C code
Annex F – Stereo embedded extension for ITU-T
G.711.1
F.1
Scope
F.2
References
F.3
Abbreviations and acronyms
F.4
Conventions
F.5
General description of the coder
F.6
Functional description of the encoder
Page
F.7
Functional description of the decoder
F.8
Bit-exact description of the ITU-T G.711.1 stereo extension coder
Appendix I – Lower‑band postfiltering for R1 mode
I.1
Windowing and FFT
I.2
Power spectral density (PSD) of the quantization noise
I.3
Postfilter computation
I.4
Time domain postfiltering (time overlap and save (OLS) with
interpolation)
I.5
Amplitude modification control
I.6
Bit-exact description of the postfilter
Appendix II – Frame-size selection
Appendix III – Decoding of the ITU-T G.711.0 bitstream part of ITU-T
G.711.1 LLC bitstreams
III.1
Case 1: When the first boundary octet of the ITU-T G.711.0 bitstream and
the number of octet Ni for the ITU-T G.711.0 bitstream
are given
III.2
Case 2: When the first boundary octet of the ITU-T G.711.0 bitstream and
the number of ITU-T G.711.1 frames Fn are given
Appendix IV – Mid-side stereo coding
IV.1
Scope
IV.2
Description of the mid-side stereo coding
IV.3
Computational complexity
Bibliography