ETSI GS CCM 001 V1.1.1 (2017-02)

Compound Content Management Specification

DGS/CCM-001

General Information

• Status: Published
• Publication Date: 09-Feb-2017
• Technical Committee: CCM - intelligent Compound Content Management
• Current Stage: 12 - Completion
• Due Date: 03-Mar-2017
• Completion Date: 10-Feb-2017

Standards Content (Sample)

ETSI GS CCM 001 V1.1.1 (2017-02)






GROUP SPECIFICATION
Compound Content Management Specification
Disclaimer
The present document has been produced and approved by intelligent Compound Content Management (CCM) ETSI Industry
Specification Group (ISG) and represents the views of those members who participated in this ISG.
It does not necessarily represent the views of the entire ETSI membership.

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Reference
DGS/CCM-001
Keywords
CCM system, HDR, HDR composer, HDR
Metadata Embedder, UHDTV, WCG

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Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Symbols . 9
3.2.1 Arithmetic operators . 9
3.2.2 Bit-wise operators . 9
3.2.3 Relational operators . 9
3.2.4 Assignment operators . 9
3.2.5 Mathematical functions . 9
3.2.6 Order of operation precedence . 10
3.3 Abbreviations . 10
4 CCM system model . 11
5 Composer definition . 12
5.1 Introduction . 12
5.2 Input and output picture format . 12
5.2.1 General . 12
5.2.2 Input picture format . 12
5.2.3 Output picture format. 13
5.3 Composing metadata (CM) definitions . 13
5.3.1 Introduction. 13
5.3.2 CM header parameter definitions . 13
5.3.3 CM mapping parameter definitions . 14
5.3.3.1 CM general mapping parameter definitions . 14
5.3.3.2 CM polynomial mapping parameter definitions. 14
5.3.3.3 CM MMR mapping parameter definitions . 15
5.3.4 CM quantization parameter definitions. 15
5.4 Composing process. 16
5.4.1 Introduction. 16
5.4.2 Inverse mapping of the base layer signal . 16
5.4.2.1 General . 16
5.4.2.2 Derivation of the pivot index . 17
5.4.2.3 BL input sample mapping . 17
5.4.2.3.1 General . 17
5.4.2.3.2 Polynomial mapping . 18
5.4.2.3.3 MMR mapping . 18
5.4.3 Enhancement layer processing . 20
5.4.3.1 General . 20
5.4.3.2 Enhancement layer non-linear inverse quantization (NLQ_LINEAR_DZ) . 20
5.4.3.3 HDR signal reconstruction . 21
5.5 Conversion to SMPTE ST 2084 transfer characteristics . 21
6 HDR display management (DM) metadata embedder definition . 22
6.1 Introduction . 22
6.2 HDR display management metadata definition . 22
6.2.1 HDR display management metadata syntax . 22
6.2.2 HDR display management metadata semantics . 24
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6.3 HDR DM metadata transmission . 29
6.3.1 HDR DM metadata transmission packetization . 29
6.3.2 HDR DM metadata transmission packet header . 30
6.3.3 HDR DM metadata transmission packet body . 31
6.3.3.1 HDR DM metadata transmission packet body (packet_type = 0b00) . 31
6.3.3.2 HDR DM metadata transmission packet body (packet_type = 0b01) . 31
6.3.3.3 HDR DM metadata transmission packet body (packet_type = 0b10 or 0b11) . 31
6.3.4 HDR DM metadata transmission packet tail . 32
6.4 Embedding HDR DM metadata transmission packets in an HDR signal . 32
6.4.1 Embedding a single HDR DM metadata transmission packet (packet_type = 0b00) . 32
6.4.2 Bit scrambling . 32
6.4.3 Repetition of HDR DM metadata transmission packets . 33
6.4.4 Embedding multiple HDR DM metadata transmission packets (packet_type ≠ 0b00) . 34
Annex A (normative): Profiles and Levels . 35
A.1 Introduction . 35
A.2 Profiles . 35
A.2.1 Main profile / ETSI profile 1 . 35
A.2.2 ETSI profile 2 . 35
A.2.3 ETSI profile 3 . 35
A.3 Levels . 36
Annex B (informative): EL and BL spatial resampling . 37
B.1 Introduction . 37
B.2 Base layer spatial resampling . 37
B.3 Enhancement layer spatial resampling . 37
Annex C (informative): Method for the conversion of transfer characteristics from
Recommendation ITU-R BT.1886 to SMPTE ST 2084 . 38
History . 42


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Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) on intelligent
Compound Content Management (CCM).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document defines and specifies the additional functionality required in consumer devices to enable the
accurate recreation of both today's television signal, i.e. SDR signal, and the HDR/WCG signal from content created
using the relevant production techniques standardized in SMPTE.
The requirement not to compromise the quality of the legacy signal using today's displays but yet to provide the highest
quality HDR/WCG signal for a new generation of televisions is onerous and requires analysis to derive an optimal
solution.
However, given the requirement to achieve backwards compatibility with existing receivers, some additional
technology will be required in the next generation of HDR/WCG receivers to accurately recreate the HDR/WCG signal.
The full HDR system as shown in the figure 1 describes an end-to-end technology suite that enables the creation and
distribution of content mastered with a high dynamic range and wide colour gamut. Display management may be used
to more accurately match the capability of a given television to the HDR/WCG signal source. This creates seamless
video experience for the viewer. The display management process may be guided by metadata generated in the HDR
encoder.
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Figure 1: Overview of a generic HDR system and
the additional HDR Compound Content Management functionality


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1 Scope
The present document specifies the additional functionality required in Consumer devices for the reconstruction of an
HDR/WCG signal using the "intelligent Compound Content Management" processing defined. Additionally it defines a
method whereby this HDR/WCG signal and its associated metadata is transported over existing commonly used
consumer baseband interfaces.
This process is one element of an end-to-end HDR video system. The definition of the overall end-to-end HDR video
system is out of scope of the present document.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] SMPTE ST 2084:2014: "Dynamic Range Electro-Optical Transfer Function of Mastering
Reference Displays".
[2] SMPTE ST 2086:2014: "Mastering Display Color Volume Metadata Supporting High Luminance
And Wide Color Gamut Images".
[3] SMPTE ST 2094-1:2016: "Mapping VC-3 Coding Units into the MXF Generic Container".
[4] SMPTE ST 2094-10:2016: "Dynamic Metadata for Color Volume Transform - Application #1".
[5] Recommendation ITU-R BT.1886-0: "Reference electro-optical transfer function for flat panel
displays used in HDTV studio production".
[6] Recommendation ITU-R BT.2100-0: "Image parameter values for high dynamic range television
for use in production and international programme exchange".
[7] Recommendation ITU ‐R BT.709 ‐6: "Parameter values for the HDTV standards for production and
international programme exchange".
[8] Recommendation ITU ‐R BT.2020 ‐2: "Parameter values for ultra ‐high definition television systems
for production and international programme exchange".
[9] Recommendation ITU-T H.265 | ISO/IEC 23008-2: "Information technology - High efficiency
coding and media delivery in heterogeneous environments - Part 2: High efficiency video coding".
[10] ISO/IEC 13818-1: "Information technology - Generic coding of moving pictures and associated
audio information - Part 1: Systems".
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2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] SMPTE 319M-2000: "For Television - Transporting MPEG-2 Recoding Information through 4:2:2
Component Digital Interfaces".
[i.2] Recommendation ITU-R BT.2246-2: "The present state of ultra-high definition television".
3 Definitions and abbreviations
3.1 Definitions
For the purpose of the present document, the following terms and definitions apply:
base layer: carries the video signal of the compound content which is used for the prediction of the HDR/WCG signal
block: MxN (M-column by N-row) array of samples
Compound Content Management (CCM): process deriving a picture with a high dynamic range
NOTE: The high dynamic range picture is derived from a BL, metadata and potentially an EL. This method can
be part of the encoding / decoding process or not.
composer: component deriving a picture with a high dynamic range
NOTE: The composer is controlled by metadata and combines two baseband pictures derived from decodable
compressed streams.
display management: process adapting the signal to the dynamic range and the colour gamut of the target display
dynamic range: ratio of the maximum light intensity to the minimum light intensity [i.2]
NOTE: In digital cameras the dynamic range is normally measured in terms of stops, which describe the total
light range by power of 2.
enhancement layer: carries the additional information required to accurately recreate the HDR/WCG signal
high dynamic range: typically a dynamic range of more than 10 stops is referred to as high dynamic range
inverse mapping: colour mapping of the BL signal to form a predictor for the EL signal
inverse quantization: non-linearly scales the EL signal from a code word with a bit depth equal to EL_bit_depth to a
code word with a higher bit depth
residual: EL signal which is the difference of the inverse mapped BL signal and the high dynamic range output signal
standard dynamic range: typically a dynamic range of up to 10 stops is referred to as standard dynamic range
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3.2 Symbols
3.2.1 Arithmetic operators
For the purposes of the present document, the following arithmetic operators apply:
+ Addition
- Subtraction (as a two-argument operator) or negation (as a unary prefix operator)
* Multiplication, including matrix multiplication
÷ Used to denote division in mathematical equations where no truncation or rounding is intended.
/ Integer division with truncation of the result toward zero. For example, 7/4 and - 7/- 4 are
truncated to 1 and - 7/4 and 7/- 4 are truncated to - 1.
3.2.2 Bit-wise operators
For the purposes of the present document, the following bit-wise operators apply:
x >> y Arithmetic right shift of a two's complement integer representation of x by y binary digits. This
function is defined only for non-negative integer values y. Bits shifted into the most significant
bits (MSBs) as a result of the right shift have a value equal to the MSB of x prior to the shift
operation.
x << y Arithmetic left shift of a two's complement integer representation of x by y binary digits. This
function is defined only for non-negative integer values y. Bits shifted into the least significant bits
as a result of the left shift have a value equal to 0.
3.2.3 Relational operators
For the purposes of the present document, the following relational operators apply:
> Greater than
>= Greater than or equal to
< Less than
<= Less than or equal to
== Equal to
!= Not equal to
3.2.4 Assignment operators
For the purposes of the present document, the following assignment operators apply:
= Assignment operator
++ Increment, i.e. x is equivalent to x = x + 1; when used in an array index, evaluates to the value of
the variable prior to the increment operation.
-- Decrement, i.e. x- - is equivalent to x = x - 1; when used in an array index, evaluates to the value
of the variable prior to the decrement operation.
+= Increment by amount specified, i.e. x += 4 is equivalent to x = x + 4, and x += (-4) is equivalent to
x = x + (-4).
-= Decrement by amount specified, i.e. x -= 4 is equivalent to x = x - 4, and x -= (-4) is equivalent to
x = x - (-4).
3.2.5 Mathematical functions
For the purposes of the present document, the following mathematical functions apply:
;≥0
Abs(x) =
−;<0
;<
;>Clip3(x, y, z) =
; ℎ
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Floor( x ) the largest integer less than or equal to x.
;≥
Max(x,y) =
;<
Round(x)=Sign(x)*Floor(Abs(x)+0,5)
1; x>0
Sign(x) = 0;=0
−1 ;<0

;<2
Short(x) = , where is a 16 bit integer value.

−2 ;≥2
3.2.6 Order of operation precedence
When order of precedence in an expression is not indicated explicitly by use of parentheses, operations are evaluated
sequentially from left to right.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
BL Base Layer
CCM Compound Content Management
CM Composing Metadata
CRC Cyclic Redundancy Check
DM Display Management
DPB Decoded Picture Buffer
EL Enhancement Layer
EOS End Of stream
EOTF Electro-Optical Transfer Function
HDR High Dynamic Range
ITU-R International Telecommunications Union - Radiocommunications standardization sector
ITU-T International Telecommunications Union - Telecommunications standardization sector
LSB Least Significant Bit
MMR Multivariate Multiple Regression
NLQ Non-Linear Quantization
PPS Picture Parameter Set
PQ Perceptual Quantizer
NOTE: As defined in SMPTE ST 2084 [1].
SDR Standard Dynamic Range
SHVC Scalable High Efficiency Video Codec
SMPTE Society of Motion Pictures and Television Engineers
ST STandard
UHD Ultra High Definition
UHDTV Ultra High Definition Television
WCG Wide Colour Gamut
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4 CCM system model
The CCM system consists of two main components, the Composer and the HDR Display Management Metadata
Embedder - see figure 2.
The composer reconstructs the HDR signal from the base layer (BL) image, the associated enhancement layer (EL)
image and the related metadata information. First the EL signal is inverse quantized by applying inverse quantization
coefficients delivered in the composing metadata (CM). Based on the BL signal and the related mapping coefficients of
the CM, the predicted HDR signal is calculated. Finally the inverse quantized residual is added to the predicted HDR
signal in order to recreate the HDR signal. If the characteristics of the BL input signal are different from the ones
defined in SMPTE ST 2084 [1], a conversion of the recreated HDR signal according to SMPTE ST 2084 is performed
to achieve the HDR output signal. The composer is defined in clause 5.
NOTE 1: Implementers can use different resolutions for the EL or the BL input pictures, thus requiring resampling
of the input data before HDR composition in order to adjust either image resolution accordingly.
Resampling is not a normative part of the present document and is assumed to be performed prior to the
HDR reconstruction step defined in the present document. A reference implementation for the spatial
resampling is provided in annex B.
Additional HDR, named HDR display management (DM) metadata, may be present at the input of the CCM system.
The HDR DM metadata combines SMPTE ST 2086 static metadata [2] and SMPTE ST 2094-1/10 dynamic metadata
[3] and [4], and is used to maintain the artistic intent when the content is mapped to the display capabilities. This HDR
DM metadata should be passed-through to the output of the composer or the metadata embedder inserts the HDR DM
metadata into the HDR picture for transport over baseband interfaces. The HDR DM metadata embedder is defined in
clause 6.
NOTE 2: The composer metadata and functionality is independent of the type of SMPTE ST 2094 metadata
carried.

Figure 2: HDR Compound Content system high-level block diagram
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5 Composer definition
5.1 Introduction
This clause defines the guidelines for combining the BL with the EL information and the composer metadata to recreate
the HDR picture.
Clause 5.2 defines the input and output picture formats of the composer.
Clause 5.3 defines the CM, which is needed for the recreation of the HDR output picture.
Clause 5.4 defines the decoding process, which is performed to recreate the HDR output picture. Clause 5.4.2 applies to
the BL mapping process. Clause 5.4.3 defines the EL processing
...