[media-types] Media type review request for draft-ietf-avtcore -rtp-v3c

Hello,

in the name of the AVTCORE working group, I would like to ask for a review
of the registration of the application/v3c media type for
draft-ietf-avtcore-rtp-v3c
(RTP Payload Format for Visual Volumetric Video-based Coding (V3C))
<https://datatracker.ietf.org/doc/draft-ietf-avtcore-rtp-v3c/08/>, which
has recently completed its last call.

The registration in question is: (from
https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#name-media-type-registration
)

Type name: application

Subtype name: v3c

Required parameters: N/A

Optional parameters: sprop-v3c-unit-header, sprop-v3c-unit-type,
sprop-v3c-vps-id, sprop-v3c-atlas-id, sprop-v3c-attr-idx,
sprop-v3c-attr-part-idx, sprop-v3c-map-idx, sprop-v3c-aux-video-flag,
sprop-v3c-parameter-set, sprop-v3c-tile-id, sprop-v3c-tile-id-pres,
sprop-v3c-atlas-data, sprop-v3c-common-atlas-data, sprop-v3c-sei,
v3c-ptl-level-idc, v3c-ptl-tier-flag, v3c-ptl-codec-idc,
v3c-ptl-toolset-idc, v3c-ptl-rec-idc and sprop-max-don-diff.

Encoding considerations: This type is only defined for transfer via RTP [
RFC3550
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#RFC3550>
].

Security considerations: Please see Section 11
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#Security-considerations>
.

Interoperability considerations: N/A

Published specification: Please refer to [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
]

Applications that use this media type: Any application that relies on
V3C-based media services over RTP

Additional information: N/A

Person & email address to contact for further information:

Intended usage: COMMON

Restrictions on usage: N/A

Author: See Authors' Addresses section of this memo.

Change controller: IETF [email protected]

Provisional registration? (standards tree only): No

The optional parameters are defined as: (from
https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#name-optional-parameters-definit
)

    sprop-v3c-unit-header:

provides a V3C unit header bytes defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
]. The value contains base64 encoded [RFC4648
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#RFC4648>
] representation of the 4 bytes of V3C unit header.

    sprop-v3c-unit-type:

sprop-v3c-unit-type provides a V3C unit type value corresponding to
vuh_unit_type defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
], i.e., defines V3C sub-bitstream type.

    sprop-v3c-vps-id:

sprop-v3c-vps-id provides a value corresponding to vuh_v3c_parameter_set_id
defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    sprop-v3c-atlas-id:

sprop-v3c-atlas-id provides a value corresponding to vuh_atlas_id defined
in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    sprop-v3c-attr-idx:

sprop-v3c-attr-idx provides a value corresponding to vuh_attribute_index
defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    sprop-v3c-attr-part-idx:

sprop-v3c-attr-part-idx provides a value corresponding to
vuh_attribute_partition_index defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    sprop-v3c-map-idx:

sprop-v3c-map-idx provides a value corresponding to vuh_map_index defined
in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    sprop-v3c-aux-video-flag:

sprop-v3c-aux-video-flag provides a value corresponding to
vuh_auxiliary_video_flag defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    sprop-v3c-parameter-set:

sprop-v3c-parameter-set provides V3C parameter set bytes as defined in [
ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
]. The value contains base64 encoded [RFC4648
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#RFC4648>
] representation of the V3C parameter set bytes.

    sprop-v3c-tile-id:

sprop-v3c-tile-id indicates that the RTP stream contains only portion of
the tiles in the atlas. sprop-v3c-tile-id is a comma-separated (',') list
of integer values, which indicate the sprop-v3c-tile-ids that are present
in the RTP stream.

    sprop-v3c-tile-id-pres:

sprop-v3c-tile-id-pres indicates that the RTP packets contain v3c-tile-id
field.

    sprop-v3c-atlas-data:

sprop-v3c-atlas-data MAY be used to convey any atlas data NAL units of the
V3C atlas sub bitstream for out-of-band transmission. The value is a
comma-separated (',') list of encoded representations of the atlas NAL
units as specified in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
]. The NAL units SHOULD be encoded as base64 [RFC4648
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#RFC4648>
] representations.

    sprop-v3c-common-atlas-data:

sprop-v3c-common-atlas-data MAY be used to convey common atlas data NAL
units of the V3C common atlas sub bitstream for out-of-band transmission.
The value is a comma-separated (',') list of encoded representations of the
common atlas NAL units (i.e., NAL_CASPS and NAL_CAF_IDR) as specified in [
ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
]. The NAL units SHOULD be encoded as base64 [RFC4648
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#RFC4648>
] representations.

    sprop-v3c-sei:

sprop-v3c-sei MAY be used to convey SEI NAL units of V3C atlas and common
atlas sub bitstreams for out-of-band transmission. The value is a
comma-separated (',') list of encoded representations of SEI NAL units
(i.e., NAL_PREFIX_NSEI and NAL_SUFFIX_NSEI, NAL_PREFIX_ESEI,
NAL_SUFFIX_ESEI) as specified in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
]. The SEI NAL units SHOULD be encoded as base64 [RFC4648
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#RFC4648>
] representations.

    v3c-ptl-level-idc:

v3c-ptl-level-idc provides a value corresponding to ptl_level_idc defined
in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    v3c-ptl-tier-flag:

v3c-ptl-tier-flag provides a value corresponding to ptl_tier_flag defined
in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    v3c-ptl-codec-idc:

v3c-ptl-codec-idc provides a value corresponding to
ptl_profile_codec_group_idc defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    v3c-ptl-toolset-idc:

v3c-ptl-toolset-idc provides a value corresponding to
ptl_profile_toolset_idc defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    v3c-ptl-rec-idc:

v3c-ptl-rec-idc provides a value corresponding to
ptl_profile_reconstruction_idc defined in [ISO.IEC.23090-5
<https://www.ietf.org/archive/id/draft-ietf-avtcore-rtp-v3c-08.html#ISO.IEC.23090-5>
].

    sprop-max-don-diff:

If the transmission order of NAL units in the RTP stream(s) is the same as
the decoding and NAL unit output order, this parameter must be equal to
0.Otherwise, if the decoding order of the NAL units of the RTP stream(s) is
the same as the NAL unit transmission order but not the same as NAL unit
output order, the value of this parameter MUST be equal to 1.Otherwise,
this parameter specifies the maximum absolute difference between the
decoding order number (i.e., AbsDon) values of any two NAL units naluA and
naluB, where naluA follows naluB in decoding order and precedes naluB in
transmission order.The value of sprop-max-don-diff MUST be an integer in
the range of 0 to 32767, inclusive.When not present, the value of
sprop-max-don-diff is inferred to be equal to 0.

Best regards,
Marius Kleidl
AVTCORE Co-Chair

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