ISO/IEC 14496-2:1999/Cor 1:2000

Information technology — Coding of audio-visual objects — Part 2: Visual — Technical Corrigendum 1

Technologies de l'information — Codage des objets audiovisuels — Partie 2: Codage visuel — Rectificatif technique 1

General Information

• Status: Withdrawn
• Publication Date: 23-Aug-2000
• Withdrawal Date: 23-Aug-2000
• 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: 9599 - Withdrawal of International Standard
• Completion Date: 06-Dec-2001

Relations

• Corrects: ISO/IEC 14496-2:1999 - Information technology — Coding of audio-visual objects — Part 2: Visual
• Effective Date: 06-Jun-2022
• Revised: ISO/IEC 14496-2:2001 - Information technology — Coding of audio-visual objects — Part 2: Visual
• Effective Date: 15-Apr-2008
• Child: ISO/IEC 14496-2:1999 - Information technology — Coding of audio-visual objects — Part 2: Visual
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL STANDARD ISO/IEC 14496-2:1999
TECHNICAL CORRIGENDUM 1
Published 2000-08-15
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION � МЕЖДУНАРОДНАЯОРГАНИЗАЦИЯПОСТАНДАРТИЗАЦИИ � ORGANISATION INTERNATIONALE DE NORMALISATION
INTERNATIONAL ELECTROTECHNICAL COMMISSION � МЕЖДУНАРОДНАЯ ЭЛЕКТРОТЕХНИЧЕСКАЯ КОМИССИЯ � COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
Information technology — Coding of audio-visual objects —
Part 2:
Visual
TECHNICAL CORRIGENDUM 1
Technologies de l'information — Codage des objets audiovisuels —
Partie 2: Codage visuel
RECTIFICATIF TECHNIQUE 1
Technical Corrigendum 1 to International Standard ISO/IEC 14496-2:1999 was prepared by Joint Technical
Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and
hypermedia information.
ICS 35.040 Ref. No. ISO/IEC 14496-2:1999/Cor.1:2000(E)
© ISO/IEC 2000 – All rights reserved
Printed in Switzerland

---------------------- Page: 1 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
Throughout the whole document, replace “quantization” with “quantisation”.
On Page xiii, Overview of the object based nonscalable syntax, replace the following paragraph:
"
The coded representation defined in the non-scalable syntax achieves a high compression ratio while preserving good image
quality. Further, when access to individual objects is desired, the shape of objects also needs to be coded, and depending on
the bandwidth available, the shape information can be coded lossy or losslessly.
"
with
"
The coded representation defined in the non-scalable syntax achieves a high compression ratio while preserving good image
quality. Further, when access to individual objects is desired, the shape of objects also needs to be coded, and depending on
the bandwidth available, the shape information can be coded in a lossy or lossless fashion.
"
In Subclause 5.1, Method of describing bitstream syntax, replace the following table:
"
while ( condition ) { If the condition is true, then the group of data elements
data_element occurs next in the data stream. This repeats until the
... condition is not true.
}
do {
data_element The data element always occurs at least once.
...
} while ( condition ) The data element is repeated until the condition is not true.
if ( condition ) { If the condition is true, then the first group of data
data_element elements occurs next in the data stream.
...
} else { If the condition is not true, then the second group of data
data_element elements occurs next in the data stream.
...
}
for ( i = m; i < n; i++) { The group of data elements occurs (n-m) times. Conditional
data_element constructs within the group of data elements may depend
... on the value of the loop control variable i, which is set to
} m for the first occurrence, incremented by one for
the second occurrence, and so forth.
/* comment . */ Explanatory comment that may be deleted entirely without
in any way altering the syntax.
"
with
"
while ( condition ) { If the condition is true, then the group of data elements
data_element occurs next in the data stream. This repeats until the
... condition is not true.
}
do {
data_element The data element always occurs at least once.
...
} while ( condition ) The data element is repeated until the condition is not true.
do {
...
continue The continue continues execution of the next repetition of the
nearest while-do loop.
...
© ISO/IEC 2000 – All rights reserved 1

---------------------- Page: 2 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
} while ( condition )
if ( condition ) { If the condition is true, then the first group of data
data_element elements occurs next in the data stream.
...
} else { If the condition is not true, then the second group of data
data_element elements occurs next in the data stream.
...
}
for ( i = m; i < n; i++) { The group of data elements occurs (n-m) times. Conditional
data_element constructs within the group of data elements may depend
... on the value of the loop control variable i, which is set to
} m for the first occurrence, incremented by one for
the second occurrence, and so forth.
/* comment . */ Explanatory comment that may be deleted entirely without
in any way altering the syntax.
"
In Subclause 5.2.4, Definition of next_start_code() function, delete the following paragraph:
"
This function checks whether the current position is byte aligned. If it is not, a zero stuffing bit followed by a number of one
stuffing bits may be present before the start code.
"
In Clause 3, Definitions, add the following definitions with the appropriate numbering in alphabetical order:
"
3.xxx mesh object planes, MOP: The instance of mesh objects at a given time.
3.xxx video object planes, VOP: The instance of video objects at a given time.
"
In Clause 3, Definitions, remove the following definition:
"
3.3 backward compatibility: A newer coding standard is backward compatible with an older coding standard if decoders
designed to operate with the older coding standard are able to continue to operate by decoding all or part of a
bitstream produced according to the newer coding standard.
"
In Table 6-3, replace the following row 5 (left column):
“
visual_object_sequence__start_code
"
with
“
visual_object_sequence_start_code
"
In Subclause 6.2.1, Start Codes, replace the following paragraph:
"
When coded visual objects are carried within a Systems bitstream defined by ISO/IEC 14496-1, configuration information and
elementary stream data are always carried separately. Configuration information and elementary streams follow the syntax
below, subject to the break points between them defined above. The Systems specification ISO/IEC 14496-1 defines
containers that are used to carry Visual Object and Visual Object Layer configuration information. A separate container is used
for each object. For video objects, a separate container is also used for each layer. VisualObjectSequence headers are not
carried explicitly, but the information is contained in other parts of the Systems bitstream.
"
2 © ISO/IEC 2000 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
with
"
When coded visual objects are carried within a Systems bitstream defined by ISO/IEC 14496-1, configuration information and
elementary stream data are always carried separately. Configuration information and elementary streams follow the syntax
below, subject to the break points between them defined above. The Systems specification ISO/IEC 14496-1 defines
containers that are used to carry Visual Object Sequence, Visual Object and Video Object Layer configuration information. For
video objects one container is used for each layer for each object. This container carries a Visual Object Sequence header, a
Visual Object header and a Video Object Layer header. For other types of visual objects, one container per visual object is
used. This container carries a Visual Object Sequence header and a Visual Object header. The Visual Object Sequence
Header must be identical for all visual streams input simultaneously to a decoder. The Visual Object Headers for each layer of
a multilayer object must be identical.
"
In Subclause 6.2.1, Start Codes, replace the following paragraph:
"
The elementary stream data associated with a single layer may be wrapped in configuration information defined in accordance
with the syntax below. A visual bitstream may contain at most one instance of each of VisualObjectSequence(), VisualObject()
and VideoObjectLayer(). The Visual Object Sequence Header must be identical for all streams input simultaneously to a
decoder. The Visual Object Headers for each layer of a multilayer object must be identical.
"
with
"
The elementary stream data associated with a single layer may be wrapped in configuration information defined in accordance
with the syntax below. A visual bitstream may contain at most one instance of each of VisualObjectSequence(), VisualObject()
and VideoObjectLayer(), with the exception of repetition of the Visual Object Sequence Header, the Visual Object Header and
the Video Object Layer Header as described below. The Visual Object Sequence Header must be identical for all visual
streams input simultaneously to a decoder. The Visual Object Headers for each layer of a multilayer object must be identical.
The Visual Object Sequence Header, the Visual Object Header and the Video Object Layer Header may be repeated in a single
visual bitstream. Repeating these headers enables random access into the visual bitstream and recovery of these headers
when the original headers are corrupted by errors. This header repetition is used only when visual_object_type in the Visual
Object Header indicates that visual object type is video. (i.e. visual_object_type==”video ID”) All of the data elements in the
Visual Object Sequence Header, the Visual Object Header and the Video Object Layer Header repeated in a visual bitstream
shall have the same value as in the original headers, except that first_half_vbv_occupancy and latter_half_vbv_occupancy may
be changed to specify the VBV occupancy just before the removal of the first VOP following the repeated Video Object Layer
Header.
"
In Subclause 6.2.2, Visual Object Sequence and Visual Object, replace the VisualObjectSequence() syntax:
"
VisualObjectSequence() { No. of bits Mnemonic
visual_object_sequence_start_code 32 bslbf
profile_and_level_indication 8uimsbf
while ( next_bits()== user_data_start_code){
user_data()
}
VisualObject()
visual_object_sequence_end_code 32 bslbf
}
"
© ISO/IEC 2000 – All rights reserved 3

---------------------- Page: 4 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
with
"
VisualObjectSequence() { No. of bits Mnemonic
do {
visual_object_sequence_start_code 32 bslbf
profile_and_level_indication 8uimsbf
while ( next_bits()== user_data_start_code){
user_data()
}
VisualObject()
} while ( next_bits() != visual_object_sequence_end_code)
visual_object_sequence_end_code 32 bslbf
}
"
In Subclause 6.2.2.1, User data(), replace the user_data() syntax:
"
user_data() { No. of bits Mnemonic
user_data_start_code 32 bslbf
while( next_bits() != ‘0000 0000 0000 0000 0000 0001’ ){
user_data 8uimsbf
}
next_start_code()
}
"
with
"
user_data() { No. of bits Mnemonic
user_data_start_code 32 bslbf
while( next_bits() != ‘0000 0000 0000 0000 0000 0001’ ){
user_data 8uimsbf
}
}
"
In Subclause 6.2.4, Group of Video Object Plane, in conformance to Table 6-3 replace the following row 2:
“
group_vop_start_codes 32 bslbf
"
with
“
group_of_vop_start_code 32 bslbf
"
4 © ISO/IEC 2000 – All rights reserved

---------------------- Page: 5 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
In Subclause 6.2.5, Video Object Plane and Video Plane with Short Header, replace the following rows 18 to 26 of the
VideoObjectPlane() syntax:
"
if(!(sprite_enable && vop_coding_type == “I”)) {
vop_width 13 uimsbf
marker_bit 1bslbf
vop_height 13 uimsbf
marker_bit 1bslbf
vop_horizontal_mc_spatial_ref 13 simsbf
marker_bit 1bslbf
vop_vertical_mc_spatial_ref 13 simsbf
}
"
with
"
if(!(sprite_enable && vop_coding_type == “I”)) {
vop_width 13 uimsbf
marker_bit 1bslbf
vop_height 13 uimsbf
marker_bit 1bslbf
vop_horizontal_mc_spatial_ref 13 simsbf
marker_bit 1bslbf
vop_vertical_mc_spatial_ref 13 simsbf
marker_bit 1bslbf
}
"
In Subclause 6.2.5, replace the following rows 33 to 35 of the VideoObjectPlane() syntax:
“
}
if (!complexity_estimation_disable)
read_vop_complexity_estimation_header()
"
with
“
}
if (video_object_layer_shape != ‘’binary only‘’)
if (!complexity_estimation_disable)
read_vop_complexity_estimation_header()
"
In Subclause 6.2.5, Video Object Plane and Video Plane with Short Header, replace row 44 of the VideoObjectPlane() syntax:
"
if (no_sprite_points > 0)
"
with
"
if (no_of_sprite_warping_points > 0)
"
© ISO/IEC 2000 – All rights reserved 5

---------------------- Page: 6 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
In Subclause 6.2.5.2, Video Plane with Short Header, replace the video_packet_header() syntax:
"
video_packet_header() { No. of bits Mnemonic
next_resync_marker()
resync_marker 17-23 uimsbf
macroblock_number 1-14 vlclbf
if (video_object_layer_shape != “binary only”)
quant_scale 5uimsbf
header_extension_code 1bslbf
if (header_extension_code) {
do {
modulo_time_base 1bslbf
} while (modulo_time_base != ‘0’)
marker_bit 1bslbf
vop_time_increment 1-16 bslbf
marker_bit 1bslbf
vop_coding_type 2uimsbf
if (video_object_layer_shape != “binary only”){
intra_dc_vlc_thr 3uimsbf
if (vop_coding_type != “I”)
vop_fcode_forward 3uimsbf
if (vop_coding_type == “B”)
vop_fcode_backward 3uimsbf
}
}
}
"
with
"
video_packet_header() { No. of bits Mnemonic
next_resync_marker()
resync_marker 17-23 uimsbf
if (video_object_layer_shape != “rectangular”){
header_extension_code 1bslbf
if (header_extension_code && !(sprite_enable && vop_coding_type == “I”)) {
vop_width 13 uimsbf
marker_bit 1bslbf
vop_height 13 uimsbf
marker_bit 1bslbf
vop_horizontal_mc_spatial_ref 13 simsbf
marker_bit 1bslbf
vop_vertical_mc_spatial_ref 13 simsbf
marker_bit 1bslbf
}
}
macroblock_number 1-14 vlclbf
if (video_object_layer_shape != “binary only”)
quant_scale 5uimsbf
if (video_object_layer_shape == “rectangular”)
6 © ISO/IEC 2000 – All rights reserved

---------------------- Page: 7 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
header_extension_code 1bslbf
if (header_extension_code) {
do {
modulo_time_base 1bslbf
} while (modulo_time_base != ‘0’)
marker_bit 1bslbf
vop_time_increment 1-16 bslbf
marker_bit 1bslbf
vop_coding_type 2uimsbf
if (video_object_layer_shape != “rectangular”){
change_conv_ratio_disable 1bslbf
if (vop_coding_type != “I”)
vop_shape_coding_type 1bslbf
}
if (video_object_layer_shape != “binary only”){
intra_dc_vlc_thr 3uimsbf
if (vop_coding_type != “I”)
vop_fcode_forward 3uimsbf
if (vop_coding_type == “B”)
vop_fcode_backward 3uimsbf
}
}
}
"
In Subclause 6.2.5.3, Motion Shape Texture, replace the following rows 11, 12 and 13 of data_patitioned_i_vop() syntax:
"
if (!transparent_mb()) {
mcbpc 1-9 vlclbf
if (mb_type == 4)
"
with
"
If (!transparent_mb()) {
if( video_object_layer_shape != “rectangle”){
do{
mcbpc 1-9 vlclbf
} while( derived_mb_type == “stuffing”)
}else{
mcbpc 1-9 vlclbf
if( derived_mb_type == “stuffing”)
continue
}
if (mb_type == 4)
"
In Subclause 6.2.5.3, Motion Shape Texture, replace the Note at the end of data_patitioned_i_vop() syntax:
"
NOTE The value of block_count is 6 in the 4:2:0 format. The value of alpha_block_count is 4.
"
© ISO/IEC 2000 – All rights reserved 7

---------------------- Page: 8 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
with
"
NOTE 1 — The value of mb_in_video_packet is the number of macroblocks in a video packet. The count of stuffing
macroblocks is not included in this value.
NOTE 2 — The value of block_count is 6 in the 4:2:0 format.
NOTE 3 — The value of alpha_block_count is 4.
"
In Subclause 6.2.5.3, Motion Shape Texture, replace the following rows 15 to 22 of the data_patitioned_p_vop() syntax:
"
if (!transparent_mb()) {
not_coded 1bslbf
if (!not_coded) {
mcbpc 1-9 vlclbf
if (derived_mb_type < 3)
motion_coding(“forward”, derived_mb_type)
}
}
"
with
"
if (!transparent_mb()) {
if( video_object_layer_shape != “rectangle”){
do{
not_coded 1bslbf
if (!not_coded)
mcbpc 1-9 vlclbf
} while( !(not_coded || derived_mb_type != “stuffing”))
}else{
not_coded 1bslbf
if (!not_coded){
mcbpc 1-9 vlclbf
if( derived_mb_type == “stuffing”)
continue
}
}
if (!not_coded) {
if (derived_mb_type < 3)
motion_coding(“forward”, derived_mb_type)
}
}
"
In Subclause 6.2.5.3, Motion Shape Texture, replace the Note at the end of data_patitioned_p_vop() syntax:
"
NOTE The value of block_count is 6 in the 4:2:0 format. The value of alpha_block_count is 4.
"
8 © ISO/IEC 2000 – All rights reserved

---------------------- Page: 9 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
with
"
NOTE 1 — The value of mb_in_video_packet is the number of macroblocks in a video packet. The count of stuffing
macroblocks is not included in this value.
NOTE 2 — The value of block_count is 6 in the 4:2:0 format.
NOTE 3 — The value of alpha_block_count is 4.
"
In Subclause 6.2.6, Macroblock, replace the following rows 6 to 11 of the macroblock() syntax:
"
if (!transparent_mb()) {
if (vop_coding_type != “I” && !(sprite_enable
&& sprite_transmit_mode == “piece”))
not_coded 1bslbf
if (!not_coded || vop_coding_type == “I”){
mcbpc 1-9 vlclbf
if (!short_video_header &&
(derived_mb_type == 3 ||
derived_mb_type == 4))
"
with
"
if (!transparent_mb()) {
if (video_object_layer_shape != “rectangular”
&& !(sprite_enable && low_latency_sprite_enable
&& sprite_transmit_mode == “update”)) {
do{
if (vop_coding_type != “I” && !(sprite_enable
&& sprite_transmit_mode == “piece”))
not_coded 1bslbf
if (!not_coded || vop_coding_type == “I”
|| (vop_coding_type == "S"
&& low_latency_sprite_enable
&& sprite_transmit_mode == "piece"))
mcbpc 1-9 vlclbf
} while(!(not_coded || derived_mb_type != “stuffing”))
}else{
if (vop_coding_type != “I” && !(sprite_enable
&& sprite_transmit_mode == “piece”))
not_coded 1bslbf
if (!not_coded || vop_coding_type == “I”
|| (vop_coding_type == "S"
&& low_latency_sprite_enable
&& sprite_transmit_mode == "piece"))
mcbpc 1-9 vlclbf
}
© ISO/IEC 2000 – All rights reserved 9

---------------------- Page: 10 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
if (!not_coded || vop_coding_type == “I”
|| (vop_coding_type == "S"
&& low_latency_sprite_enable
&& sprite_transmit_mode == "piece")) {
if (!short_video_header &&
(derived_mb_type == 3 ||
derived_mb_type == 4))
"
In Subclause 6.2.8, Still Texture Object, replace the StillTextureObject() syntax:
"
StillTextureObject() { No. of bits Mnemonic
still_texture_object_start_code 32
texture_object_id 16 uimsbf
marker_bit 1bslbf
wavelet_filter_type 1uimsbf
wavelet_download 1uimsbf
wavelet_decomposition_levels 4uimsbf
scan_direction 1bslbf
start_code_enable 1bslbf
texture_object_layer_shape 2uimsbf
quantization_type 2uimsbf
if (quantization_type == 2) {
spatial_scalability_levels 4uimsbf
if (spatial_scalability_levels != wavelet_decomposition_levels) {
use_default_spatial_scalability 1uimsbf
if (use_default_spatial_layer_size == 0)
for (i=0; i wavelet_layer_index 4
}
}
if (wavelet_download == “1” ){
uniform_wavelet_filter 1uimsbf
if (uniform_wavelet_filter == “1”)
download_wavelet_filters()
else
for (I=0; i download_wavelet_filters( )
}
wavelet_stuffing 3uimsbf
if(texture_object_layer_shape == “00”){
texture_object_layer_width 15 uimsbf
marker_bit 1bslbf
texture_object_layer_height 15 uimsbf
marker_bit 1bslbf
}
else {
horizontal_ref 15 imsbf
marker_bit 1bslbf
vertical_ref 15 imsbf
10 © ISO/IEC 2000 – All rights reserved

---------------------- Page: 11 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
marker_bit 1bslbf
object_width 15 uimsbf
marker_bit 1bslbf
object_height 15 uimsbf
marker_bit 1bslbf
shape_object_decoding ( )
}
for(color= “y”, “u”, “v”)
wavelet_dc_decode()
if(quantization_type == 1)
TextureLayerSQ ( )
else if (quantization_type == 2){
if (start_code_enable == 1) {
do {
TextureSpatialLayerMQ ( )
} while ( next_bits() == texture_spatial_layer_start_code )
}else{
for (i =0; i TextureSpatialLayerMQNSC ( )
}
}
else if (quantization_type == 3){
for(color= “y”, “u”, “v”)
do{
quant_byte
} while( quant_byte >>7)
max_bitplanes
if (scan_direction == 0) {
do {
TextureSNRLayerBQ ( )
} while (next_bits() == texture_snr_layer_start_code)
}else{
do {
TextureSpatialLayerBQ ( )
} while ( next_bits() == texture_spatial_layer_start_code )
}
}
}
"
with
"
StillTextureObject() { No. of bits Mnemonic
still_texture_object_start_code 32
texture_object_id 16 uimsbf
marker_bit 1bslbf
wavelet_filter_type 1uimsbf
wavelet_download 1uimsbf
wavelet_decomposition_levels 4uimsbf
scan_direction 1bslbf
start_code_enable 1bslbf
© ISO/IEC 2000 – All rights reserved 11

---------------------- Page: 12 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
texture_object_layer_shape 2uimsbf
quantization_type 2uimsbf
if (quantization_type == 2) {
spatial_scalability_levels 4uimsbf
if (spatial_scalability_levels != wavelet_decomposition_levels) {
use_default_spatial_scalability 1uimsbf
if (use_default_spatial_layer_size == 0)
for (i=0; i wavelet_layer_index 4
}
}
if (wavelet_download == “1” ){
uniform_wavelet_filter 1uimsbf
if (uniform_wavelet_filter == “1”)
download_wavelet_filters()
else
for (i=0; i download_wavelet_filters( )
}
wavelet_stuffing 3uimsbf
if(texture_object_layer_shape == “00”){
texture_object_layer_width 15 uimsbf
marker_bit 1bslbf
texture_object_layer_height 15 uimsbf
marker_bit 1bslbf
}
else {
horizontal_ref 15 imsbf
marker_bit 1bslbf
vertical_ref 15 imsbf
marker_bit 1bslbf
object_width 15 uimsbf
marker_bit 1bslbf
object_height 15 uimsbf
marker_bit 1bslbf
shape_object_decoding ( )
}
for(color= “y”, “u”, “v”)
wavelet_dc_decode()
if(quantization_type == 1)
TextureLayerSQ ( )
else if (quantization_type == 2){
if (start_code_enable == 1) {
do {
TextureSpatialLayerMQ ( )
} while ( next_bits() == texture_spatial_layer_start_code )
}else{
for (i =0; i TextureSpatialLayerMQNSC ( )
}
12 © ISO/IEC 2000 – All rights reserved

---------------------- Page: 13 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
}
else if (quantization_type == 3){
for(color= “y”, “u”, “v”)
do{
quant_byte
} while( quant_byte >>7)
max_bitplanes
if (scan_direction == 0) {
do {
TextureSNRLayerBQ ( )
} while (next_bits() == texture_snr_layer_start_code)
}else{
do {
TextureSpatialLayerBQ ( )
} while ( next_bits() == texture_spatial_layer_start_code )
}
}
}
"
In Subclause 6.2.8.1, replace the TextureLayerSQ() syntax:
"
TextureLayerSQ() { No. of bits Mnemonic
if (scan_direction == 0) {
for (“y”, “u”, “v”){
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
for (i=0; i if ( i!=0 || color!= “u“,“v“ ){
max_bitplane[i] 5 uimsbf
if ((i+1)%4==0)
marker_bit 1bslbf
}
}
for (i = 0; i for(color= “y”, “u”, “v”)
arith_decode_highbands_td()
}else{
if ( start_code_enable ) {
do {
TextureSpatialLayerSQ()
} while ( next_bits() == texture_spatial_layer_start_code)
}else{
for (i = 0; i< wavelet_decomposition_levels; i++)
TextureSpatialLayerSQNSC()
}
}
}
"
© ISO/IEC 2000 – All rights reserved 13

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ISO/IEC 14496-2:1999/Cor.1:2000(E)
with
"
TextureLayerSQ() { No. of bits Mnemonic
if (scan_direction == 0) {
for (“y”, “u”, “v”){
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
for (i=0; i if ( i!=0 || color!= “u“,“v“ ){
max_bitplane[i] 5 uimsbf
if ((i+1)%4==0)
marker_bit 1bslbf
}
}
for (i = 0; i for(color= “y”, “u”, “v”)
arith_decode_highbands_td()
}else{
if ( start_code_enable ) {
do {
TextureSpatialLayerSQ()
} while ( next_bits() == texture_spatial_layer_start_code)
}else{
for (i = 0; i< wavelet_decomposition_levels; i++)
TextureSpatialLayerSQNSC()
}
}
}
NOTE — The value of tree_block is that wavelet coefficients are organized in a tree structure which is rooted in the low-
low band (DC band) of the wavelet decomposition, then extends into the higher frequency bands at the same spatial
location. Note the DC band is encoded separately.
"
In Subclause 6.2.8.3, replace the TextureSpatialLayerSQNSC() syntax:
"
TextureSpatialLayerSQNSC() { No. of bits Mnemonic
for (color=“y“,“u“,“v“){
if ( (first_wavelet_layer && color==“y“)||
(second_wavelet_layer && color==“u“,“v“))
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
if (color ==“y“)
max_bitplanes 5uimbsf
else if (!first_wavelet_layer)
max_bitplanes 5uimbsf
}
arith_decode_highbands_bb()
}
"
14 © ISO/IEC 2000 – All rights reserved

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ISO/IEC 14496-2:1999/Cor.1:2000(E)
with
"
TextureSpatialLayerSQNSC() { No. of bits Mnemonic
for (color=“y“,“u“,“v“){
if ( (first_wavelet_layer && color==“y“)||
(second_wavelet_layer && color==“u“,“v“))
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
if (color ==“y“)
max_bitplanes 5uimbsf
else if (!first_wavelet_layer)
max_bitplanes 5uimbsf
}
for (color="y","u","v")
if (color="y" || !first_wavelet_layer)
arith_decode_highbands_bb()
}
NOTE — The value of first_wavelet_layer becomes “true” when the variable ‘i’ of Subclause 6.2.8.1 TextureLayerSQ()
equals to zero. Otherwise, it is “false”.
The value of second_wavelet_layer becomes “true” when the variable ‘i’ of Subclause 6.2.8.1 TextureLayerSQ() equals to
one. Otherwise, it is “false”.
"
In Subclause 6.2.8.7, replace the TextureSNRLayerMQNSC() syntax:
"
TextureSNRLayerMQNSC(){ No. of bits Mnemonic
if (spatial_scalability_levels == wavelet_decomposition_levels
&& spatial_layer_id == 0) {
for(color= “y“ ){
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
for (i=0; i max_bitplane[i] 5 uimsbf
if ((i+1)%4 == 0)
marker_bit 1bslbf
}
}
}
else {
for (color=“y”, “u”, “v”){
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
for (i=0; i max_bitplane[i] 5 uimsbf
if ((i+1)%4 == 0)
marker_bit 1bslbf
}
}
© ISO/IEC 2000 – All rights reserved 15

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ISO/IEC 14496-2:1999/Cor.1:2000(E)
}
if (scan_direction == 0) {
for (i = 0; i for(color= “y”, “u”, “v”)
if (wavelet_decomposition_layer_id != 0 || color != “u”, “v” )
arith_decode_highbands_td()
}else{
for (i = 0; i< spatial_layers; i++) {
for(color= “y”, “u”, “v”){
if (wavelet_decomposition_layer_id != 0 || color != “u”, “v” )
arith_decode_highbands_bb()
}
}
}
}
"
with
"
TextureSNRLayerMQNSC(){ No. of bits Mnemonic
if (spatial_scalability_levels == wavelet_decomposition_levels
&& spatial_layer_id == 0) {
for(color= “y“ ){
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
for (i=0; i max_bitplane[i] 5 uimsbf
if ((i+1)%4 == 0)
marker_bit 1bslbf
}
}
}
else {
for (color=“y”, “u”, “v”){
do {
quant_byte 8uimsbf
} while (quant_byte >> 7)
for (i=0; i max_bitplane[i] 5 uimsbf
if ((i+1)%4 == 0)
marker_bit 1bslbf
}
}
}
if (scan_direction == 0) {
for (i = 0; i for(color= “y”, “u”, “v”)
if (wavelet_decomposition_layer_id != 0 || color != “u”, “v” )
arith_decode_highbands_td()
}else{
16 © ISO/IEC 2000 – All rights reserved

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ISO/IEC 14496-2:1999/Cor.1:2000(E)
for (i = 0; i< spatial_layers; i++) {
for(color= “y”, “u”, “v”){
if (wavelet_decomposition_layer_id != 0 || color != “u”, “v” )
arith_decode_highbands_bb()
}
}
}
}
NOTE — The value of spatial_layers is equivalent to the maximum number of the wavelet decomposition layers in that
scalability layer.
"
In Subclause 6.2.8.11, DownloadWaveletFilters, replace the download_wavelet_filters syntax:
“
download_wavelet_filters( ){ No. of bits Mnemonic
lowpass_filter_length 4uimsbf
highpass_filter_length 4uimsbf
do{
if ( wavelet_filter_type == 0) {
filter_tap_integer 16 imsbf
marker_bit 1bslbf
}else{
filter_tap_float_high 16 uimsbf
marker_bit 1bslbf
filter_tap_float_low 16 uimsbf
marker_bit 1bslbf
}
} while (lowpass_filter_length--)
do{
if ( wavelet_filter_type == 0){
filter_tap_integer 16 imsbf
marker_bit 1bslbf
}else{
filter_tap_float_high 16 uimsbf
marker_bit 1bslbf
filter_tap_float_low 16 uimsbf
marker_bit 1bslbf
}
} while (highpass_filter_length--)
if ( wavelet_filter_type == 0) {
integer_scale 16 uimsbf
marker_bit
}
}
"
with
“
download_wavelet_filters( ){ No. of bits Mnemonic
lowpass_filter_length 4uimsbf
highpass_filter_length 4uimsbf
© ISO/IEC 2000 – All rights reserved 17

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ISO/IEC 14496-2:1999/Cor.1:2000(E)
do{
if ( wavelet_filter_type == 0) {
filter_tap_integer 16 imsbf
marker_bit 1bslbf
}else{
filter_tap_float_high 16 uimsbf
marker_bit 1bslbf
filter_tap_float_low 16 uimsbf
marker_bit 1bslbf
}
} while (lowpass_filter_length--)
do{
if ( wavelet_filter_type == 0){
filter_tap_integer 16 imsbf
marker_bit 1bslbf
}else{
filter_tap_float_high 16 uimsbf
marker_bit 1bslbf
filter_tap_float_low 16 uimsbf
marker_bit 1bslbf
}
} while (highpass_filter_length--)
if ( wavelet_filter_type == 0) {
integer_scale 16 uimsbf
marker_bit 1bslbf
}
}
"
In Subclause 6.3.3, Semantics of the low_delay, replace the following:
"
low_delay : This is a one-bit flag which when set to ‘1’ indicates the VOL contains no B-VOPs.
"
with
"
low_delay : This is a one-bit flag which when set to ‘1’ indicates the VOL contains no B-VOPs. If this flag is not present in the
bitstream, the default value is 0 for visual object types that support B-VOP otherwise it is 1
"
In Subclause 6.3.3, Video Object Layer, replace the following:
“
sprite_left_coordinate – This is a 13-bit signed integer which defines the left-edge of the sprite. The value of
sprite_left_coordinate shall be divisible by two.
sprite_top_coordinate: This is a 13-bit signed integer which defines the top edge of the sprite. The value of
sprite_left_coordinate shall be divisible by two.
"
with
“
sprite_left_coordinate – This is a 13-bit signed integer which defines the left edge of the sprite. The value of
sprite_left_coordinate shall be divisible by two.
sprite_top_coordinate: This is a 13-bit signed integer which defines the top edge of the sprite. The value of
sprite_top_coordinate shall be divisible by two.
"
in Subclause 6.3.3, Video Object Layer, replace table 6-16:
18 © ISO/IEC 2000 – All rights reserved

---------------------- Page: 19 ----------------------
ISO/IEC 14496-2:1999/Cor.1:2000(E)
“
Table 6-16 Number of point and implied warping function
Number of points warping function
0 Stationary
1 Translation
2,3 Affine
4 Perspective
"
with
“
Table 6-16 Number of points and implied warping function
Number of points warping f
...