diff --git a/index.bs b/index.bs index cbf75b77..3a6294c9 100644 --- a/index.bs +++ b/index.bs @@ -19,14 +19,14 @@ Metadata Order: This version, !*, * 
-url: https://www.iso.org/standard/68960.html#; spec: ISO-BMFF; type: dfn;
+url: https://www.iso.org/standard/83102.html#; spec: ISO-BMFF; type: dfn;
 	text: AudioSampleEntry
 	text: channelcount
 	text: samplerate
 	text: roll_distance
 	text: SamplingRateBox
 
-url: https://www.iso.org/standard/68960.html#; spec: ISO-BMFF; type: property;
+url: https://www.iso.org/standard/83102.html#; spec: ISO-BMFF; type: property;
 	text: iso6
 	text: stsd
 	text: edts
@@ -82,10 +82,10 @@ url: https://tools.ietf.org/html/rfc7845#; spec: RFC-7845; type: dfn;
 url: https://tools.ietf.org/html/rfc6716#; spec: RFC-6716; type: dfn;
 	text: Opus packet
 
-url: https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1770-4-201510-I!!PDF-E.pdf#; spec: ITU-1770-4; type: dfn;
+url: https://www.itu.int/rec/R-REC-BS.1770#; spec: ITU-1770-4; type: dfn;
 	text: LKFS
 
-url: https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2051-3-202205-I!!PDF-E.pdf#; spec: ITU-2051-3; type: dfn;
+url: https://www.itu.int/rec/R-REC-BS.2051#; spec: ITU-2051-3; type: dfn;
 	text: Loudspeaker configuration for Sound System A (0+2+0)
 	text: Loudspeaker configuration for Sound System B (0+5+0)
 	text: Loudspeaker configuration for Sound System C (2+5+0)
@@ -150,7 +150,7 @@ url: https://www.iso.org/standard/77752.html#; spec: MP4-PCM; type: dfn;
 		"title": "Information Technology - Coding of audio-visual objects - Part 12: ISO base media file format",
 		"status" : "Standard",
 		"publisher" : "ISO/IEC",
-		"href" : "https://www.iso.org/standard/68960.html"
+		"href" : "https://www.iso.org/standard/83102.html"
 	},
 	"ISO-CICP": {
 		"title": "Information Technology - Coding-Independent Code Points - Part 3: Audio",
@@ -162,13 +162,13 @@ url: https://www.iso.org/standard/77752.html#; spec: MP4-PCM; type: dfn;
 		"title": "Algorithms to measure audio programme loudness and true-peak audio level",
 		"status": "Standard",
 		"publisher": "ITU",
-		"href": "https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1770-4-201510-I!!PDF-E.pdf"
+		"href": "https://www.itu.int/rec/R-REC-BS.1770"
 	},
 	"ITU-2051-3": {
 		"title": "Advance sound system for programme production",
 		"status": "Standard",
 		"publisher": "ITU",
-		"href": "https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2051-3-202205-I!!PDF-E.pdf"
+		"href": "https://www.itu.int/rec/R-REC-BS.2051"
 	},
 	"Q-Format": {
 		"title": "Q (number format)",
@@ -198,13 +198,13 @@ url: https://www.iso.org/standard/77752.html#; spec: MP4-PCM; type: dfn;
 		"title": "Audio Definition Model",
 		"status": "Standard",
 		"publisher": "ITU",
-		"href": "https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2076-2-201910-I!!PDF-E.pdf"
+		"href": "https://www.itu.int/rec/R-REC-BS.2076"
 	},
 	"ITU-2127-0": {
 		"title": "Audio Definition Model renderer for advanced sound systems",
 		"status": "Standard",
 		"publisher": "ITU",
-		"href": "https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.2127-0-201906-I!!PDF-E.pdf"
+		"href": "https://www.itu.int/rec/R-REC-BS.2127"
 	},
 	"EBU-Tech-3396": {
 		"title": "BINAURAL EBU ADM RENDERER (BEAR) FOR OBJECT-BASED SOUND OVER HEADPHONES",
@@ -2372,15 +2372,15 @@ This section defines the renderer to use, given a channel-based [=Audio Element=
     - Else, if the playback layout matches a [=loudspeaker_layout=] which can be generated from the highest loudspeaker layout of the [=Audio Element=] according to [[#scalablechannelaudio-channellayoutgenerationrule]],
             - If the playback layout has height channels, use [=demixing_info_parameter_data=] or [=default_demixing_info_parameter_data=].
             - Else, if the input layout does not have height channels, use [=demixing_info_parameter_data=] or [=default_demixing_info_parameter_data=].
-            - Else, the EAR Direct Speakers renderer ([[!ITU-2127-0]]) can be used.
+            - Else, the EAR Direct Speakers renderer ([[ITU-2127-0]]) can be used.
     - Else, render according to [[#processing-mixpresentation-rendering-m2l-withoutdemixinfo]].
 
 ##### Rendering Without Demixing Info ##### {#processing-mixpresentation-rendering-m2l-withoutdemixinfo}
 - If the playback layout is neither 3.1.2ch nor 7.1.2ch,
-    - If the playback layout complies with the loudspeaker layouts supported by [[!ITU-2051-3]], the EAR Direct Speakers renderer ([[!ITU-2127-0]]) can be used, for example.
+    - If the playback layout complies with the loudspeaker layouts supported by [[!ITU-2051-3]], the EAR Direct Speakers renderer ([[ITU-2127-0]]) can be used, for example.
     - Else, an implementation-specific renderer can be used, for example.
 - Else if the playback layout is 7.1.2ch,
-    - The EAR Direct Speakers renderer ([[!ITU-2127-0]]) can be used, for example, to first render the input audio to 7.1.4ch, followed by down-mixing from 7.1.4ch to 7.1.2ch. The height channels of 7.1.4ch are down-mixed to the height channels of 7.1.2ch as follows:
+    - The EAR Direct Speakers renderer ([[ITU-2127-0]]) can be used, for example, to first render the input audio to 7.1.4ch, followed by down-mixing from 7.1.4ch to 7.1.2ch. The height channels of 7.1.4ch are down-mixed to the height channels of 7.1.2ch as follows:
 		\[ \text{Ltf2} = \text{Ltf4} + 0.707 \times \text{Ltb} \]
 		\[ \text{Rtf2} = \text{Rtf4} + 0.707 \times \text{Rtb} \]
 - Else if the playback layout is 3.1.2ch,
@@ -2405,7 +2405,7 @@ This section provides guidelines about the renderer to use, given a scene-based
 - The input layout of the IA renderer is set to Ambisonics.
 - The output layout of the IA renderer is set to the playback layout.
 - The IA renderer used can be selected according to the following rules:
-    - If the playback layout complies with the loudspeaker layouts supported by [[!ITU-2051-3]], the EAR HOA renderer ([[!ITU-2127-0]]) can be used.
+    - If the playback layout complies with the loudspeaker layouts supported by [[!ITU-2051-3]], the EAR HOA renderer ([[ITU-2127-0]]) can be used.
     - Else, if there is an implementation-specific renderer, use it.
     - Else, the EAR HOA renderer can be used to render to the next highest [[!ITU-2051-3]] layout compared to the playback layout, and then down-mix using an implementation-specific renderer or use the static down-mix matrices specified in [[#processing-downmixmatrix-static]] if available.
 
@@ -2426,11 +2426,11 @@ The AmbiX format uses ACN channel ordering and SN3D normalization, defined in [[
 
 #### Rendering a Channel-Based Audio Element to Headphones (Informative) #### {#processing-mixpresentation-rendering-m2b}
 
-Given a channel-based [=Audio Element=] and headphones playback, the Binaural EBU ADM Direct Speaker renderer [[!EBU-Tech-3396]] can be used. The highest layout provided in [=scalable_channel_layout_config=] can be used as the input to the renderer.
+Given a channel-based [=Audio Element=] and headphones playback, the Binaural EBU ADM Direct Speaker renderer [[EBU-Tech-3396]] can be used. The highest layout provided in [=scalable_channel_layout_config=] can be used as the input to the renderer.
 
 #### Rendering a Scene-Based Audio Element to Headphones (Informative) #### {#processing-mixpresentation-rendering-a2b}
 
-Given a scene-based [=Audio Element=] and headphones playback, the Resonance Audio renderer [[!Resonance-Audio]] can be used.
+Given a scene-based [=Audio Element=] and headphones playback, the Resonance Audio renderer [[Resonance-Audio]] can be used.
 
 
 ### Mixing Audio Elements ### {#processing-mixpresentation-mixing}
@@ -2760,6 +2760,11 @@ class Bar {
 
 # Change Since V1.0.0-errata # {#change-list}
 
+- Reference Fixing: Moving to informative (EBU-Tech-3396, ITU-2127, and Resonance Audio), fixing broken links (ITU specs), and updating the linking version of ISOBMFF.
+- Improve Readibility: Improve scalable channel group and layer text.
+- Clarification: Profile clarification regarding channels.
+- Clarification: Channel clarification.
+
 # Annex # {#annex}
 
 ## Annex A: IAMF Generation Process (Informative) ## {#iamfgeneration}