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Added Informative / Normative section labeling. #70

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Added Informative / Normative section labeling. #70

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14 changes: 7 additions & 7 deletions VPCodecISOMediaFileFormatBinding.md
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Expand Up @@ -2,7 +2,7 @@
VP Codec ISO Media File Format Binding
======================================

v1.0 2017-03-30
v1.1 2017-10-24

_Frank Galligan, Google
Kilroy Hughes, Microsoft
Expand Down Expand Up @@ -41,15 +41,15 @@ Normative References
High Luminance and Wide Color Gamut Images


Data Types and Fields
Data Types and Fields (Informative)
---------------------

Fixed-point numbers are signed or unsigned values that result from dividing an
integer by an appropriate power of 2. For example, a 0.16 fixed-point number
is formed by dividing a 16-bit integer by 2^16.


Basic Encapsulation Scheme
Basic Encapsulation Scheme (Normative)
--------------------------

This section describes the basic data structures used to signal encapsulation
Expand Down Expand Up @@ -232,7 +232,7 @@ coefficients" section of ISO/IEC 23001-8:2016.
codec initialization data.


Video Samples
Video Samples (Normative)
-------------

Video sample storage in the generic binding uses a simple mapping to frames
Expand All @@ -245,7 +245,7 @@ Note: VP8 does not support superframes, and so it is not possible to carry VP8
using this specification if the VP8 stream includes altref frames.[^2]


Carriage of HDR Metadata
Carriage of HDR Metadata (Normative)
------------------------

This section specifies a model for carrying VP codec HDR metadata.
Expand Down Expand Up @@ -356,7 +356,7 @@ as specified in CEA-861.3, Appendix A.
Level as specified in CEA-861.3, Appendix A.


Common Encryption
Common Encryption (Normative)
-----------------

This section specifies how to signal Common Encryption for VP video streams,
Expand Down Expand Up @@ -397,7 +397,7 @@ the superframe.
<p class="caption">Figure 3: Sample-based VP9 encryption with clear uncompressed header</p>


Codecs Parameter String
Codecs Parameter String (Normative)
-----------------------

DASH and other applications require defined values for the 'Codecs' parameter
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