Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio — Amendment 1: Media authenticity

ISO/IEC 23008-3/DAmd 1

ISO/IEC 23008-3/DAmd 1: Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio — Amendment 1: Media authenticity

ISO/IEC 23008-3:XXXX/DAM 1:2026(en)

ISO/IEC JTC1/SC 29/WG 6

Secretariat: JISC

Date: 2025-11-21

Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio
Amendment 1: Media authenticity

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Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 3: 3D audio
Amendment 1: Media authenticity

Add the following at the end of Section 2:

IETF RFC 3986, Uniform Resource Identifier (URI): Generic Syntax

Replace Table 223 with the following:

Syntax	No. of bits	Mnemonic
MHASPacketPayload(MHASPacketType)
{
switch (MHASPacketType) {
case PACTYP_SYNC:
0xA5; /* syncword*/	8	uimsbf
break;
case PACTYP_MPEGH3DACFG:
mpegh3daConfig();
break;
case PACTYP_MPEGH3DAFRAME:
mpegh3daFrame();
break;
case PACTYP_AUDIOSCENEINFO:
mae_AudioSceneInfo();
break;
case PACTYP_FILLDATA:
for (i=0; i< MHASPacketLength; i++) {
mhas_fill_data_byte(i);	8	bslbf
}
break;
case PACTYP_SYNCGAP:
syncSpacingLength = escapedValue(16,24,24);	16,40,64	uimsbf
break;
case PACTYP_MARKER:
for (i=0; i< MHASPacketLength; i++) {
marker_byte(i);	8	bslbf
}
break;
case PACTYP_CRC16:
mhasParity16Data;	16	bslbf
break;
case PACTYP_CRC32:
mhasParity32Data;	32	bslbf
break;
case PACTYP_GLOBAL_CRC16:
global_CRC_type;	2	bslbf
numProtectedPackets;	6	bslbf
mhasParity16Data;	16	bslbf
break;
case PACTYP_ GLOBAL_CRC32:
global_CRC_type;	2	bslbf
numProtectedPackets;	6	bslbf
mhasParity32Data;	32	bslbf
break;
case PACTYP_DESCRIPTOR:
for (i=0; i< MHASPacketLength; i++) {
mhas_descriptor_data_byte(i);	8	bslbf
}
break;
case PACTYP_USERINTERACTION:
mpegh3daElementInteraction();
break;
case PACTYP_LOUDNESS_DRC:
mpegh3daLoudnessDrcInterface();
break;
case PACTYP_BUFFERINFO:
mhas_buffer_fullness_present	1	uimsbf
if (mhas_buffer_fullness_present)
mhas_buffer_fullness = escapedValue(15,24,32);	15,39,71	uimsbf
}
break;
case PACTYP_AUDIOTRUNCATION:
audioTruncationInfo();
break;
case PACTYP_GENDATA:
GenDataPayload();
break;
case PACTYP_EARCON:
earconInfo();
break;
case PACTYP_PCMCONFIG:
pcmDataConfig();
break;
case PACTYP_PCMDATA:
pcmDataPayload();
break;
case PACTYP_LOUDNESS:
mpegh3daLoudnessInfoSet();
break;
case PACTYP_AUTH_START:
mpegh3daAuthStart();
break;
case PACTYP_AUTH_SIG:
mpegh3daAuthSig();
break;
case PACTYP_UUID:
authUUID();
break;
case PACTYP_TIMESTAMP:
authTimestamp();
break;
}
ByteAlign();
}

Replace Table 226 with the following:

Table 1 — MHASPacketType	Table 2 — Value
PACTYP_FILLDATA	0
PACTYP_MPEGH3DACFG	1
PACTYP_MPEGH3DAFRAME	2
PACTYP_AUDIOSCENEINFO	3
/ reserved for ISO use /	4-5
PACTYP_SYNC	6
PACTYP_SYNCGAP	7
PACTYP_MARKER	8
PACTYP_CRC16	9
PACTYP_CRC32	10
PACTYP_DESCRIPTOR	11
PACTYP_USERINTERACTION	12
PACTYP_LOUDNESS_DRC	13
PACTYP_BUFFERINFO	14
PACTYP_GLOBAL_CRC16	15
PACTYP_GLOBAL_CRC32	16
PACTYP_AUDIOTRUNCATION	17
PACTYP_GENDATA	18
PACTYP_EARCON	19
PACTYP_PCMCONFIG	20
PACTYP_PCMDATA	21
PACTYP_LOUDNESS	22
PACTYP_AUTH_START	23
PACTYP_AUTH_SIG	24
PACTYP_UUID	25
PACTYP_TIMESTAMP	26
/ reserved for ISO use /	27-127
/ reserved for use outside of ISO scope /	128-261
/ reserved for ISO use /	262-389
/ reserved for use outside of ISO scope /	390-517
Application-specific MHASPacketType values are mandated to be in the space reserved for use outside of ISO scope. These shall be skipped by a decoder as a minimum of structure is required by the decoder to skip these extensions.

After 14.4.18, add the following:

14.4.19 PACTYP_AUTH_START

The MHASPacketType PACTYP_AUTH_START shall be used embed information for media authentication into the bitstream.

For this packet type, MHASPacketLabel has the same value as the related packets to which this authentication information refers to.

14.4.20 PACTYP_AUTH_SIG

The MHASPacketType PACTYP_AUTH_SIG shall be used embed information for media authentication into the bitstream.

For this packet type, MHASPacketLabel has the same value as the related packets to which this authentication information refers to.

14.4.21 PACTYP_AUTH_UUID

The MHASPacketType PACTYP_UUID shall be used embed UUID information into the bitstream, for instance in support of media authentication.

For this packet type, MHASPacketLabel has the same value as the related packets to which this UUID refers to.

14.4.22 PACTYP_TIMESTAMP

The MHASPacketType PACTYP_TIMESTAMP shall be used embed timestamp information into the bitstream, for instance in support of media authentication.

For this packet type, MHASPacketLabel has the same value as the related packets to which this timestamp information refers to.

Replace Table 229 with the following:

MHASPacketType	Value	Value of MHASPacketLabel
MHASPacketType	Value	0	0x01 – 0x10 (main stream)	0x11 and larger (sub-streams)
PACTYP_FILLDATA	0	required	not allowed	not allowed
PACTYP_MPEGH3DACFG	1	not allowed	no restriction	no restriction
PACTYP_MPEGH3DAFRAME	2	not allowed	no restriction	no restriction
PACTYP_AUDIOSCENEINFO	3	not allowed	no restriction	no restriction
/ reserved for ISO use /	4-5	—	—	—
PACTYP_SYNC	6	required	not allowed	not allowed
PACTYP_SYNCGAP	7	required	not allowed	not allowed
PACTYP_MARKER	8	no restriction	no restriction	no restriction
PACTYP_CRC16	9	shall be identical to MHASPacketLabel of MHAS packet immediately following the present MHAS packet
PACTYP_CRC32	10
PACTYP_DESCRIPTOR	11	required	not allowed	not allowed
PACTYP_USERINTERACTION	12	not allowed	required	not allowed
PACTYP_LOUDNESS_DRC	13	not allowed	required	not allowed
PACTYP_BUFFERINFO	14	no restriction	no restriction	no restriction
PACTYP_GLOBAL_CRC16	15	required	not allowed	not allowed
PACTYP_GLOBAL_CRC32	16	required	not allowed	not allowed
PACTYP_AUDIOTRUNCATION	17	not allowed	no restriction	no restriction
PACTYP_GENDATA	18	no restriction	no restriction	no restriction
PACTYP_ EARCON	19	shall be identical to MHASPacketLabel of MHAS packets containing the audio addressed by the earcon
PACTYP_ PCMCONFIG	20	not allowed	not allowed	> 2048
PACTYP_ PCMDATA	21	not allowed	not allowed	> 2048
PACTYP_ LOUDNESS	22	not allowed	no restriction	no restriction
PACTYP_ AUTH_START	23	no restriction	no restriction	no restriction
PACTYP_ AUTH_SIG	24	no restriction	no restriction	no restriction
PACTYP_ UUID	25	no restriction	no restriction	no restriction
PACTYP_ TIMESTAMP	26	no restriction	no restriction	no restriction
/ reserved for ISO use /	27-127	—	—	—
/ reserved for use outside of ISO scope /	128-261	—	—	—
/ reserved for ISO use /	262-389	—	—	—
/ reserved for use outside of ISO scope /	390-517	—	—	—
Key: —: undefined required: MHASPacketLabel shall have (one of) the value(s) listed in the title row of this column if packet is present no restriction: MHASPacketLabel may have (one of) the value(s) listed in the title row of this column if packet is present not allowed: MHASPacketLabel shall not have (any of) the value(s) listed in the title row of this column

After 14.7, add:

14.8 Media Authentication

The media authentication data is encapsulated in multiple MHAS Packets as part of a MHAS audio data stream.

14.8.1 Syntax

For the MHAS packet with MHASPacketType of PACTYP_AUTH_START, mpegh3daAuthStart() is defined as shown in Table 1.

For the MHAS packet with MHASPacketType of PACTYP_AUTH_SIG, mpegh3daAuthSig() is defined as shown in Table 2.

For the MHAS packet with MHASPacketType of PACTYP_UUID, authUUID() is defined as shown in Table 3.

For the MHAS packet with MHASPacketType of PACTYP_TIMESTAMP, authTimestamp() is defined as shown in Table 4.

Table 1 — Syntax of mpegh3daAuthStart

Syntax	No. of bits	Mnemonic
mpegh3daAuthStart()
{
authID	8	uimsbf
authSequence	1	uimsbf
authHashType = escapedValue(4,8,8);	4, 12, 20	uimsbf
authKeyID = escapedValue(3,8,8);	3, 11, 19	uimsbf
authProvID = escapedValue(8,8,16);	8, 16, 32	uimsbf
if (authProvID == 0x00) {
authSourceURILengthMinus1 = escapedValue(8,8,8);	8, 16, 24	uimsbf
for (i=0; i<= authSourceURILengthMinus1; i++) {
authSourceURI[i]	8	bslbf
}
}

isAuthCRC	1	uimsbf

authFrameTypes	1	uimsbf
if (authFrameTypes){
authPactypInclusion	1	uimsbf
authPactypListLengthMinus1	6	uimsbf
for (i=0; i <= authPactypListLengthMinus1; i++) {
authPacketType[i] = escapedValue(8,8,8);	8, 16, 24	uimsbf
}
}

authMultiStreams	1	uimsbf
if (authMultiStreams) {
authMSInclusion	1	uimsbf
authMSLabelsListLengthMinus1	6	uimsbf
for(i=0; i <= authMSLabelsListLengthMinus1; i++) {
authPacketLabel[i]	8, 16, 48	uimsbf
= escapedValue(8,8,32);
}
}
}

Table 2 — Syntax of mpegh3daAuthSig

Syntax	No. of bits	Mnemonic
mpegh3daAuthSig()
{
authID	8	uimsbf
authSequence	1	uimsbf
authPartialSig	1	uimsbf
authABREnable	2	uimsbf
numSig = 1;

if (authABREnable) {
authABRBitrateAtMinMax	2	uimsbf

if (authABREnable==1) {
if(authABRBitrateAtMinMax==1) {
numSig = 2;
} else {
numSig = 3;
}
}
if (authABREnable==2) {
if(authABRBitrateAtMinMax==1) {
numSig = 3;
} else if(authABRBitrateAtMinMax==2) {
numSig = 4;
} else {
numSig = 5;
}
}
}
for (n=0; n<numSig; n++) {
if (authPartialSig){
sigSegmentStart	1	uimsbf
sigSegmentStop	1	uimsbf
sigSegmentLengthMinus1	4	uimsbf
sigPartial	*(sigSegmentLengthMinus1+1)8**	uimsbf
} else {
sigLengthMinus1	6	uimsbf
sigComplete	*(sigLengthMinus1+1)8**	uimsbf
}
}
}

Table 3 — Syntax of authUUID

Syntax	No. of bits	Mnemonic
authUUID()
{
uuidSegmentStart	1	uimsbf
uuidSegmentStop	1	uimsbf
uuidSegmentLengthMinus1	4	uimsbf
uuid	*(uuidSegmentLengthMinus1+1)8**	uimsbf
}

Table 4 — Syntax of authTimestamp

Syntax	No. of bits	Mnemonic
authTimestamp()
{
authID	8	uimsbf
authTimeType	7	uimsbf
authTimeOffsetType	1	uimsbf
switch (authTimeType ) {
case authTimeLong:
authTime = escapedValue(12,16,32);	12, 28, 60	uimsbf
authTimeOffset	12	uimsbf
break;
case authTimeShort:
authTimeS = escapedValue(4,8,8);	4, 12, 20	uimsbf
authTimeOffsetS = escapedValue(4,8,8);	4, 12, 20	uimsbf
break;
case authTimeTAI: { /* acc. ISO/IEC 23001-17 */
TAI_timestamp;	64	uimsbf
status_bits;	8	uimsbf
break;
default:
break;
}
}

14.8.2 Semantics

authID	Shall be used to identify the combination of authHashType, authProvID and authKeyID to which the related authentication information belongs to. This may be used to enable authentication of one authentication sequence with different authentication configurations.
authSequence	Indicates the authentication sequence to which the related authentication information belongs to.
authHashType	Indicates the hashing algorithm used according to Table XYZ.

Table XYZ — Value and meaning of authHashType

authHashType Value	Hashing algorithm
0	SHA-1
1	SHA-224
2	SHA-256
3	SHA-384
4	SHA-512
All other values	/* reserved for ISO use */

authProvID

Identifies the provider of the authentication system according to Table XYZ. In case authProvID equals to 1, there is no provider. This mode can be used to create a message digest only by using the method identified by authHashType.

Table XYZ — Value and meaning of authProvID

authProvID Value	Authentication Provider URI
0	See authSourceURI.
1	Message Digest only
2-…	/* Registration Authority */

authKeyID

Identifies the authentication key used to calculate the value of the signature in mpegh3daAuthSig() according to Table XYZ. The values of authKeyID are dependent on the authentication provider and are not defined in the present document. This value shall be set to 0 in case there is no key needed for the underlying hashing function.

Table XYZ — Value and meaning of authKeyID

authKeyID Value	Key
0	No key
All values	/* Authentication Provider key ID */

authSourceURILengthMinus1	Plus 1 indicates the length of the authSourceURI-field in bytes.
authSourceURI	Contains a URI with syntax and semantics as defined in as defined in IETF RFC 3986.

isAuthCRC	Indicates if an CRC-based authentication method is used. If set to 1, the used verification mechanism shall generate the signature (sigPartial or sigComplete) utilizing the data resulting from calculating a CRC as defined in 1.8.4.5 (CRC16) of ISO/IEC 14496-3, using the syntax elements according to 17.12.4 as input.

authFrameTypes	Indicates if authentication information for additional MHAS packet types is signalled.

authPactypInclusion

If set to 1, all packet types signalled in authPacketType shall be included into the calculation of the authentication information, according to 17.12.4. If set to 0, all packet types signalled in authPacketType shall be excluded from the calculation of the authentication information, according to 17.12.4.

authPactypListLengthMinus1

Plus 1 indicates the length of the list of authPacketType.

authPacketType

Indicates the MHAS packet type to be included or excluded for the calculation of the authentication information.

authMultiStreams

Indicates if authentication information for multi-stream scenarios is signalled.

authMSInclusion

If set to 1, all packets with the labels signalled in authPacketLabel shall be included into the calculation of the authentication information, according to according to 17.12.4. If set to 0, all packet types signalled in authPacketLabel shall be excluded from the calculation of the authentication information, according to according to 17.12.4.

authMSLabelsListLengthMinus1

Plus 1 indicates the length of the list of authPacketLabel.

authPacketLabel

Indicates the MHASPacketLabel to be included or excluded for the calculation of the authentication information. If authMSInclusion is equal to ‘1’, the value of authPacketLabel indicates that the sub-stream with this packet label shall be included in the calculation of the authentication information, according to 17.12.4.

If authMSInclusion is equal to ‘0’, the value of authPacketLabel indicates that the sub-stream with this packet label shall be excluded from the calculation of the authentication information, according to according to 17.12.4.

authPartialSig

If set to ‘1’, indicates that the signature is transmitted partially.

authABREnable

Indicates the type of the adaptive bitrate (ABR) scheme and the respective number of signature values according to Table XYZ.

In the case that authABREnable equals 1 (upDownABR), the order of encapsulation is as follows: signatures for the streams at the current bitrate, the bitrate one above, the bitrate one below.

In the case that authABREnable equals 2 (upDownMinMaxABR), the order of encapsulation is as follows: signatures for the streams at the current bitrate, the bitrate one above, the bitrate one below, the maximum bitrate, the minimum bitrate.

Table XYZ — Value and meaning of authABREnable

authABREnable Value	ABR Scheme
0	noABR
1	upDownABR
2	upDownMinMaxABR
3	/* reserved */

authABRBitrateAtMinMax

Indicates whether the current bitrate fulfils one of the conditions according to Table XYZ, that are related to the minimum and maximum bitrates in the adaptation set. In either case, the number of signature values is reduced.

Table XYZ — Value and meaning of authABRBitrateMinMax

authABRBitrateMinMax Value	ABR Bitrate Status
0	Default value
1	The current bitrate is equal to the maximum or minimum bitrate in the adaptation set
2	The current bitrate is one level below the maximum or one level above the minimum bitrate in the adaptation set
3	/* reserved */

sigSegmentStart

Indicates that the following sigPartial is the first segment of a signature.

sigSegmentStop

Indicates that the following sigPartial is the last segment of a signature.

NOTE: If both sigSegmentStartand and sigSegmentStop are equal to ‘1’, sigPartial contains a signature which is complete, but shorter than a full signature resulting from the related hashing algorithm.

sigSegmentLengthMinus1

Plus 1 indicates the length of the sigPartial field.

sigPartial

This field carries a segment of the signature resulting from the used verification mechanism. sigPartial shall be calculated in the same way as sigComplete. sigPartial may be created by truncating sigComplete.

Note: Verification may happen comparing only a subset of the bits resulting from the hashing algorithm.

sigLengthMinus1

Plus 1 indicates the length of the sigComplete field in bytes.

sigComplete

This field carries the signature resulting from the used verification mechanism. sigComplete shall be calculated by applying the hashing algorithm and configuration as signalled in the mpegh3daAuthStart() syntax element. The input data to the hashing algorithm shall be created in alignment with 17.12.4.

Note: Verification may happen comparing only a subset of the bits resulting from the hashing algorithm.

uuidSegmentStart

If set to ‘1’, indicates if the bytes in the uuid field are the first bytes of a UUID-segment.

uuidSegmentStop

If set to ‘1’, indicates if the bytes in the uuid field are the last bytes of a UUID-segment.

Note: If both uuidSegmentStart and uuidSegmentStop are set to ‘1’ the uuid field contains the full UUID.

uuidSegmentLengthMinus1

Plus 1 indicates the length of the uuid-field in bytes.

uuid

This field contains the UUID of the related (sub-)stream of MHAS packets. It may be used to map the MHAS stream to other media types, such as a related video stream.

authTimeType

Indicates the type of the time-signalling according to Table XYZ.

Table XYZ — Value and meaning of authTimeType

authTimeType Value	Timing Scheme
0	authTimeLong
1	authTimeShort
2	authTimeTAI
3-127	/* reserved */

authTimeOffestType

Indicates the unit of authTimeOffset value. This shall be set to ‘0’ if the unit is milliseconds, and shall be set to ‘1’ for using the sampling rate configured for the underlying signal type as base time.

authTime

Indicates the base time. This is counted in seconds and the count starts on January 1st, 2025 at 00.00.01 UTC.

authTimeOffset

Indicates the time offset compared to the value indicated in authTime. The time shall be set in a way that authTime + authTimeOffset indicates the time when the first sample of following related mpegh3daFrame() has been recorded.

authTimeS

Indicates the base time elapsed in seconds since the last time update of type ‘authTimeLong’.

authTimeOffsetS

Indicates the time offset compared to the value indicated in authTimeS. The time shall be set in a way that authTime + authTimeOffset + authTimeS + authTimeOffsetS indicates the time when the first sample of following related mpegh3daFrame() has been recorded.

TAI_timestamp

Indicates the TAI_timestamp according to ISO/IEC 23001-17.

status_bits

Indicates the bits synchronization_state, timestamp_generation_failure, timestamp_is_modified and reserved according to ISO/IEC 23001-17.

After 17.11, add the following:

17.12 Interface for media authentication data

17.12.1 General

For applications which require media authentication, related data for verification of the authenticity of a bitstream and mapping to other media types shall be provided to the system by using the syntax element mpegh3da_GetAuthData().

17.12.2 Syntax

Table 5 — Syntax of mpegh3da_GetAuthData

Syntax	No. of bits	Mnemonic
mpegh3da_GetAuthData()
{
mpegh3daAuthStart()
mpegh3daAuthSig()
authUUID()
authTimestamp()
gad_bytesLengthMinus1	64	uimsbf
gad_bytes	*(gad_bytesLengthMinus1+1)8**	uimsbf
}

17.12.3 Semantics

gad_bytesLengthMinus1

Plus 1 indicates the length of the gad_bytes field.

gad_bytes

Includes all bytes relevant for the creation of the authentication information according to the configuration described in mpegh3daAuthStart().

17.12.4 Processing

17.12.4.1 General

The MPEG-H 3D audio decoder shall extract the MHAS packets related to media authentication for every authentication sequence as indicated by authID and authSequence, and populate the respective fields in mpegh3da_GetAuthData().

mpegh3daAuthStart() and mpegh3daAuthSig(),for the related authentication sequence (as indicated by the respective authID and authSequence) shall be copied from the respective bitstream elements. authTimestamp() having the same authID as the current authentication sequence and authUUID() syntax elements shall always be copied from the latest occurrences in bitstream. The gad_bytes field shall be populated by concatenating all bytes of all packets starting from the packet with MHASPacketType equal to ‘PACTYP_ AUTH_START’ for the related authentication sequence and having the same MHASPacketLabel up until but excludingthe packet with MHASPacketType equal to ‘PACTYP_AUTH_SIG’ in which either sigSegmentStop equals ‘1’ or authPartialSig equals ‘0’, unless the MHASPacketType of the related packet is excluded by default or signalled to be excluded (see 17.12.4.2 for additional information). Packets with MHASPacketType equal to ‘PACTYP_AUTH_SIG’ belonging to the respective authentication sequence shall not be populated into gad_bytes. Packets with MHASPacketType equal to ‘PACTYP_ AUTH_START’ or ‘PACTYP_AUTH_SIG’ with the same authID value as the current authentication sequence and a different authSequence value shall be populated into gad_bytes. Packets with MHASPacketType equal to ‘PACTYP_ AUTH_START’ or ‘PACTYP_AUTH_SIG’ with a different authID value than the current authentication sequence shall not be populated into gad_bytes.In addition to the above, packets with the following packet types shall be excluded by default and not be populated into gad_bytes:

	—	PACTYP_SYNCGAP
	—	PACTYP_MARKER
	—	PACTYP_CRC16
	—	PACTYP_CRC32
	—	PACTYP_GLOBAL_CRC16
	—	PACTYP_GLOBAL_CRC32
	—	PACTYP_USERINTERACTION
	—	PACTYP_AUDIOTRUNCATION
	—	PACTYP_GENDATA
	—	PACTYP_EARCON
	—	PACTYP_PCMCONFIG
	—	PACTYP_PCMDATA

If the related packet with the MHASPacketType equal to ‘PACTYP_AUTH_START’ contains a MHASPacketLabel equal to ‘0’, all bytes of all packets shall be concatenated as described above, independent of their MHASPacketLabel (all sub streams).

The input data for the hashing algorithm shall be created by concatenating gad_bytes with the bytes contained in the uuid field, if existing.

17.12.4.2 Inclusion and exclusion

Per default, all bytes of all packets other than the packets carrying a MHASPacketType which is listed to be excluded by default shall be concatenated for populating the gad_bytes field. In addition, all bytes of all packets having a MHASPacketType listed in the authPacketType field shall be included, if authPactypInclusion is equal to ‘1’. If authPactypInclusion is equal to ‘0’, all bytes of all packets having a MHASPacketType listed in the authPacketType field shall be excluded (in addition to the packets which are excluded by default).

In addition to the bytes of all packets belonging to the same sub stream as indicated by the MHASPacketLabel field (or all sub streams in case MHASPacketLabel is equal to ‘0’), all bytes of all relevant packets for each sub streams as indicated in the authPacketLabel field shall be included, if authMSInclusion is equal to ‘1’. If authMSInclusion is equal to ‘0’, all bytes of all relevant packets for each sub streams having a MHASPacketLabel listed in the authPacketLabel field shall be excluded.

Add the following paragraph to the end of the clause 20.1:

If a SwitchingGroupBox as defined in ISO/IEC 14496-12 is present, the values of the mae_groupIDs (defined in subclause 15) of the corresponding stream(s) shall be carried in the tag field of the SwitchingGroupBox as a whitespace separated list.

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