ISO/IEC 11172-2:1993/Cor 2:1999

Information technology — Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s — Part 2: Video — Technical Corrigendum 2

Technologies de l'information — Codage de l'image animée et du son associé pour les supports de stockage numérique jusqu'à environ 1,5 Mbit/s — Partie 2: Vidéo — Rectificatif technique 2

General Information

• Status: Published
• Publication Date: 10-Nov-1999
• 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
• Completion Date: 11-Nov-1999

Relations

• Child: ISO/IEC 11172-2:1993 - Information technology — Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s — Part 2: Video
• Effective Date: 15-Apr-2008
• Corrects: ISO/IEC 11172-2:1993 - Information technology — Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s — Part 2: Video
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL STANDARD ISO/IEC 11172-2:1993
TECHNICAL CORRIGENDUM 2
Published 1999-12-01
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION � МЕЖДУНАРОДНАЯОРГАНИЗАЦИЯПОСТАНДАРТИЗАЦИИ � ORGANISATION INTERNATIONALE DE NORMALISATION
INTERNATIONAL ELECTROTECHNICAL COMMISSION � МЕЖДУНАРОДНАЯ ЭЛЕКТРОТЕХНИЧЕСКАЯ КОМИССИЯ � COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
Information technology — Coding of moving pictures and
associated audio for digital storage media at up to about
1,5Mbit/s—
Part 2:
Video
TECHNICAL CORRIGENDUM 2
Technologies de l'information — Codage de l'image animée et du son associé pour les supports de stockage
numérique jusqu'à environ 1,5 Mbit/s —
Partie 2: Vidéo
RECTIFICATIF TECHNIQUE 2
Technical Corrigendum 2 to International Standard ISO/IEC 11172-2:1993 was prepared by Joint Technical
Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and
hypermedia information.
1) Replace subclause 2.4.3.2 (page 25, line 38) by:
“
The value for intra_quantizer_matrix[0] shall always be 8.
”.
ICS 681.3.04(084.14) Ref. No. ISO/IEC 11172-2:1993/Cor.2:1999(E)
© ISO/IEC 1999 – All rights reserved
Printed in Switzerland

---------------------- Page: 1 ----------------------
ISO/IEC 11172-2:1993/Cor.2:1999(E)
2) Replace subclause 2.4.3.6 (page 30, line 2) by:
“
If macroblock_pattern is zero, cbp=0.
”.
3) Replace subclause 2.4.3.7 (page 30, line 25) by:
“
The number of bits in the following dct_dc_differential code, dct_dc_size_luminance, is derived according to the VLC table
B.5a.
”.
4) Replace subclause 2.4.3.7 (page 30, line 29) by:
“
The number of bits in the following dct_dc_differential code, dct_dc_size_chrominance, is derived according to the VLC table
B.5b.
”.
5) Replace subclause 2.4.3.7 (page 30, line 32) by:
“
If dct_dc_size_luminance or dct_dc_size_chrominance (as appropriate) is zero, then dct_dc_differential is not present in the
bitstream.
”.
6) Replace subclause 2.4.3.7 (page 30, line 35) by:
“
If dct_dc_size_luminance or dct_dc_size_chrominance (as appropriate) is greater than zero, then dct_zz[0] is computed as
follows from dct_dc_differential:
”.
7) Replace subclause 2.4.3.7 (page 30, line 37-43) by:
“
For luminance blocks:
if ( dct_dc_differential & ( 1 << (dct_dc_size_luminance-1)) ) dct_zz[0] = dct_dc_differential ;
else dct_zz[0] = ( (-1) << (dct_dc_size_luminance) ) | (dct_dc_differential+1) ;
For chrominance blocks:
if ( dct_dc_differential & ( 1 << (dct_dc_size_chrominance-1)) ) dct_zz[0] = dct_dc_differential ;
else dct_zz[0] = ( (-1) << (dct_dc_size_chrominance) ) | (dct_dc_differential+1) ;
”.
8) Replace subclause 2.4.3.7 (page 30, table) by:
“
example for dct_dc_size_luminance = 3
”.
9) Replace subclause 2.4.4.4 (page 38, lines 4-5) by:
“
In B-pictures, the skipped macroblock is defined to have the same direction of prediction (forward, backward, or bidirectional)
as the prior macroblock, differential motion vectors equal to zero, and no DCT coefficients.
”.
10) Replace subclause D.6.5.2 (page 99, line 39) by:
“
Whereas in P-pictures skipped macroblocks have a motion vector equal to zero, in B-
...