ISO/IEC 23003-1:2007/Cor 4:2012

Information technology — MPEG audio technologies — Part 1: MPEG Surround — Technical Corrigendum 4

Technologies de l'information — Technologies audio MPEG — Partie 1: Ambiance MPEG — Rectificatif technique 4

General Information

• Status: Published
• Publication Date: 02-Sep-2012
• ICS: 35.040 - Information coding
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Current Stage: 6060 - International Standard published
• Due Date: 13-Feb-2015
• Completion Date: 03-Sep-2012

Relations

• Corrects: ISO/IEC 23003-1:2007 - Information technology — MPEG audio technologies — Part 1: MPEG Surround
• Effective Date: 08-May-2020

Standards Content (Sample)

INTERNATIONAL STANDARD ISO/IEC 23003-1:2007
TECHNICAL CORRIGENDUM 4
Published 2012-09-01
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  ORGANISATION INTERNATIONALE DE NORMALISATION
INTERNATIONAL ELECTROTECHNICAL COMMISSION  МЕЖДУНАРОДНАЯ ЭЛЕКТРОТЕХНИЧЕСКАЯ КОМИССИЯ  COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE


Information technology — MPEG audio technologies —
Part 1:
MPEG Surround
TECHNICAL CORRIGENDUM 4
Technologies de l'information — Technologies audio MPEG —
Partie 1: Ambiance MPEG
RECTIFICATIF TECHNIQUE 4
Technical Corrigendum 4 to ISO/IEC 23003-1:2007 was prepared by Joint Technical Committee ISO/IEC
JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information.

In 3.3.1, replace:
y log x is the base-2 logarithm of x .
10
with:
y logx is the base-10 logarithm of x .
 
10

ICS 35.040 Ref. No. ISO/IEC 23003-1:2007/Cor.4:2012(E)
©  ISO/IEC 2012 – All rights reserved
Published in Switzerland

---------------------- Page: 1 ----------------------
ISO/IEC 23003-1:2007/Cor.4:2012(E)
In 4.6, replace:
The surround gain is applied to each surround channel (i.e., left surround and right surround for a 5.1
configuration) in the PCM domain after QMF synthesis.
with:
The surround gain is applied to each surround channel in the PCM domain after QMF synthesis (i.e. left
surround and right surround for a 5.1 configuration with the addition of rear left surround and rear right
surround for a 727 or 757 configuration).
2 2

At the end of 4.6, add:
The application of pre- and post-gains is dependent on the output configuration according to the following
table. In the case of binaural output, the surround gain is explicitly included in the formulas for power
reconstruction (see 6.11.4)
Table X - Application of pre- and post-gains
Stereo output Binaural output Multichannel output
no yes yes
Surround gain
LFE gain no no yes
Downmix gain no no yes

In 6.4.3.2.1 replace:
nk,
nk,
v
L
x
L
0

nk,

v
nk,
R

x

R
0
nk,

v

nk, C
nk,,nk nk, nk,
x

TTT
vMx M 
nk,
res
11 0
v

OTT
2
nk,
x
ArtDmx nk,
res
1
v
OTT
1
nk,

x
nk,
ArtDmx

res
2 v
TTT
0
with:
nk,
nk,
v
L
x
L
0

nk,

v
nk,
R

x

R
0
nk,

v

nk, C
nk,,nk n,k nk,

x

vMx M TTT
res nk,
11
0
v
OTT
1
nk,

x
ArtDmx nk,
res

1 v
OTT
2

nk,

x nk,
ArtDmx

res
v
2
TTT
0

In 6.4.4.1, replace Figure 27:
2 ©  ISO/IEC 2012 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC 23003-1:2007/Cor.4:2012(E)
x v w y y
L
y y
L L
x R
L
0
C
y y
Lc Lsr
x
R
0 y y
OTT d Ls Ls
1
D
1 OTT
res
1
Pre-
mix
decorrelator
d
2 y y
R R
matrix
OTT
TTT matrix
D
OTT
res 2
res
0
2
[M2]
[M1]
y y
Rc Rs
d
d 1
TTT 0
D
0
d
2
ArtDmx
res
1
y y
Rs Rsr
d
3
OTT
OTT
D
3 res
3
y y
C C
ArtDmx
d
4
res
2 OTT
OTT
D
res
4
4
y y
LFE LFE
decorrelators
7-2-7 7-2-7
1 2

with:

x v w y y
L
y y
L L
x R
L
0
C
y y
Lc Lsr
x
R y y
...