rfc8846v4.txt		rfc8846.txt
	skipping to change at line 194 ¶		skipping to change at line 194 ¶
	Capture Device: A device that converts physical input, such as		Capture Device: A device that converts physical input, such as
	audio, video, or text, into an electrical signal, in most cases to		audio, video, or text, into an electrical signal, in most cases to
	be fed into a media encoder.		be fed into a media encoder.
	Capture Encoding: A specific encoding of a Media Capture, to be sent		Capture Encoding: A specific encoding of a Media Capture, to be sent
	by a Media Provider to a Media Consumer via RTP.		by a Media Provider to a Media Consumer via RTP.
	Capture Scene: A structure representing a spatial region captured by		Capture Scene: A structure representing a spatial region captured by
	one or more Capture Devices, each capturing media representing a		one or more Capture Devices, each capturing media representing a
	portion of the region. The spatial region represented by a		portion of the region. The spatial region represented by a
	Capture Scene MAY correspond to a real region in physical space,		Capture Scene may correspond to a real region in physical space,
	such as a room. A Capture Scene includes attributes and one or		such as a room. A Capture Scene includes attributes and one or
	more Capture Scene Views, with each view including one or more		more Capture Scene Views, with each view including one or more
	Media Captures.		Media Captures.
	Capture Scene View (CSV): A list of Media Captures of the same media		Capture Scene View (CSV): A list of Media Captures of the same media
	type that together form one way to represent the entire Capture		type that together form one way to represent the entire Capture
	Scene.		Scene.
	CLUE Participant: This term is imported from the CLUE protocol		CLUE Participant: This term is imported from the CLUE protocol
	document [RFC8847].		document [RFC8847].
	skipping to change at line 219 ¶		skipping to change at line 219 ¶
	way to encode a Media Capture to become a Capture Encoding.		way to encode a Media Capture to become a Capture Encoding.
	Encoding Group: A set of encoding parameters representing a total		Encoding Group: A set of encoding parameters representing a total
	media encoding capability to be subdivided across potentially		media encoding capability to be subdivided across potentially
	multiple Individual Encodings.		multiple Individual Encodings.
	Endpoint: A CLUE-capable device that is the logical point of final		Endpoint: A CLUE-capable device that is the logical point of final
	termination through receiving, decoding and rendering, and/or		termination through receiving, decoding and rendering, and/or
	initiation through capturing, encoding, and sending of media		initiation through capturing, encoding, and sending of media
	streams. An endpoint consists of one or more physical devices		streams. An endpoint consists of one or more physical devices
	that source and sink media streams and exactly one participant		that source and sink media streams, and exactly one participant
	[RFC4353] (which, in turn, includes exactly one SIP User Agent).		[RFC4353] (which, in turn, includes exactly one SIP User Agent).
	Endpoints can be anything from multiscreen/multicamera rooms to		Endpoints can be anything from multiscreen/multicamera rooms to
	handheld devices.		handheld devices.
	Media: Any data that, after suitable encoding, can be conveyed over		Media: Any data that, after suitable encoding, can be conveyed over
	RTP, including audio, video, or timed text.		RTP, including audio, video, or timed text.
	Media Capture: A source of Media, such as from one or more Capture		Media Capture: A source of Media, such as from one or more Capture
	Devices or constructed from other media streams.		Devices or constructed from other media streams.
	Media Consumer: A CLUE-capable device that intends to receive		Media Consumer: A CLUE-capable device that intends to receive
	Capture Encodings.		Capture Encodings.
	Media Provider: A CLUE-capable device that intends to send Capture		Media Provider: A CLUE-capable device that intends to send Capture
	Encodings.		Encodings.
	Multiple Content Capture (MCC): A Capture that mixes and/or switches		Multiple Content Capture (MCC): A Capture that mixes and/or switches
	other Captures of a single type (e.g., all audio or all video.)		other Captures of a single type (for example, all audio or all
	Particular Media Captures may or may not be present in the		video). Particular Media Captures may or may not be present in
	resultant Capture Encoding depending on time or space. Denoted as		the resultant Capture Encoding depending on time or space.
	"MCCn" in the example cases in this document.		Denoted as "MCCn" in the example cases in this document.
	Multipoint Control Unit (MCU): A CLUE-capable device that connects		Multipoint Control Unit (MCU): A CLUE-capable device that connects
	two or more endpoints together into one single multimedia		two or more endpoints together into one single multimedia
	conference [RFC7667]. An MCU includes a Mixer, similar to those		conference [RFC7667]. An MCU includes a Mixer, similar to those
	in [RFC4353], but without the requirement to send media to each		in [RFC4353], but without the requirement to send media to each
	participant.		participant.
	Plane of Interest: The spatial plane within a scene containing the		Plane of Interest: The spatial plane within a scene containing the
	most-relevant subject matter.		most-relevant subject matter.
	Provider: Same as Media Provider.		Provider: Same as a Media Provider.
	Render: The process of generating a representation from Media, such		Render: The process of generating a representation from Media, such
	as displayed motion video or sound emitted from loudspeakers.		as displayed motion video or sound emitted from loudspeakers.
	Scene: Same as Capture Scene.		Scene: Same as a Capture Scene.
	Simultaneous Transmission Set: A set of Media Captures that can be		Simultaneous Transmission Set: A set of Media Captures that can be
	transmitted simultaneously from a Media Provider.		transmitted simultaneously from a Media Provider.
	Single Media Capture: A capture that contains media from a single		Single Media Capture: A capture that contains media from a single
	source capture device, e.g., an audio capture from a single		source capture device, e.g., an audio capture from a single
	microphone or a video capture from a single camera.		microphone or a video capture from a single camera.
	Spatial Relation: The arrangement of two objects in space, in		Spatial Relation: The arrangement of two objects in space, in
	contrast to relation in time or other relationships.		contrast to relation in time or other relationships.
	skipping to change at line 476 ¶		skipping to change at line 476 ¶
	</xs:sequence>		</xs:sequence>
	<xs:attribute name="personID" type="xs:ID" use="required"/>		<xs:attribute name="personID" type="xs:ID" use="required"/>
	<xs:anyAttribute namespace="##other" processContents="lax"/>		<xs:anyAttribute namespace="##other" processContents="lax"/>
	</xs:complexType>		</xs:complexType>
	<!-- PERSON TYPE ELEMENT -->		<!-- PERSON TYPE ELEMENT -->
	<xs:element name="personType" type="xs:string">		<xs:element name="personType" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed		Acceptable values (enumerations) for this type are managed
	by IANA in the "CLUE Schema &lt;personType&gt; registry",		by IANA in the "CLUE Schema &lt;personType&gt;" registry,
	accessible at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	<!-- VIEW ELEMENT -->		<!-- VIEW ELEMENT -->
	<xs:element name="view" type="xs:string">		<xs:element name="view" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed		Acceptable values (enumerations) for this type are managed
	by IANA in the "CLUE Schema &lt;view&gt; registry",		by IANA in the "CLUE Schema &lt;view&gt;" registry,
	accessible at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	<!-- PRESENTATION ELEMENT -->		<!-- PRESENTATION ELEMENT -->
	<xs:element name="presentation" type="xs:string">		<xs:element name="presentation" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed		Acceptable values (enumerations) for this type are managed
	by IANA in the "CLUE Schema &lt;presentation&gt; registry",		by IANA in the "CLUE Schema &lt;presentation&gt;" registry,
	accessible at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	<!-- SPATIAL INFORMATION TYPE -->		<!-- SPATIAL INFORMATION TYPE -->
	<xs:complexType name="spatialInformationType">		<xs:complexType name="spatialInformationType">
	<xs:sequence>		<xs:sequence>
	<xs:element name="captureOrigin" type="captureOriginType"		<xs:element name="captureOrigin" type="captureOriginType"
	minOccurs="0"/>		minOccurs="0"/>
	skipping to change at line 601 ¶		skipping to change at line 601 ¶
	<xs:anyAttribute namespace="##other" processContents="lax"/>		<xs:anyAttribute namespace="##other" processContents="lax"/>
	</xs:extension>		</xs:extension>
	</xs:complexContent>		</xs:complexContent>
	</xs:complexType>		</xs:complexType>
	<!-- SENSITIVITY PATTERN ELEMENT -->		<!-- SENSITIVITY PATTERN ELEMENT -->
	<xs:element name="sensitivityPattern" type="xs:string">		<xs:element name="sensitivityPattern" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed by		Acceptable values (enumerations) for this type are managed by
	IANA in the "CLUE Schema &lt;sensitivityPattern&gt; registry",		IANA in the "CLUE Schema &lt;sensitivityPattern&gt;" registry,
	accessible at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	<!-- VIDEO CAPTURE TYPE -->		<!-- VIDEO CAPTURE TYPE -->
	<xs:complexType name="videoCaptureType">		<xs:complexType name="videoCaptureType">
	<xs:complexContent>		<xs:complexContent>
	<xs:extension base="tns:mediaCaptureType">		<xs:extension base="tns:mediaCaptureType">
	<xs:sequence>		<xs:sequence>
	skipping to change at line 1321 ¶		skipping to change at line 1321 ¶
	The <view> element is an optional tag describing what is represented		The <view> element is an optional tag describing what is represented
	in the spatial area covered by a media capture. It has been		in the spatial area covered by a media capture. It has been
	specified as a simple string with an annotation pointing to an IANA		specified as a simple string with an annotation pointing to an IANA
	registry that is defined ad hoc:		registry that is defined ad hoc:
	<!-- VIEW ELEMENT -->		<!-- VIEW ELEMENT -->
	<xs:element name="view" type="xs:string">		<xs:element name="view" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed		Acceptable values (enumerations) for this type are managed
	by IANA in the "CLUE Schema &lt;view&gt; registry",		by IANA in the "CLUE Schema &lt;view&gt;" registry,
	accessible at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	The current possible values, as per the CLUE framework document		The current possible values, as per the CLUE framework document
	[RFC8845], are: "room", "table", "lectern", "individual", and		[RFC8845], are: "room", "table", "lectern", "individual", and
	"audience".		"audience".
	11.19. <presentation>		11.19. <presentation>
	skipping to change at line 1343 ¶		skipping to change at line 1343 ¶
	The <presentation> element is an optional tag used for media captures		The <presentation> element is an optional tag used for media captures
	conveying information about presentations within the telepresence		conveying information about presentations within the telepresence
	session. It has been specified as a simple string with an annotation		session. It has been specified as a simple string with an annotation
	pointing to an IANA registry that is defined ad hoc:		pointing to an IANA registry that is defined ad hoc:
	<!-- PRESENTATION ELEMENT -->		<!-- PRESENTATION ELEMENT -->
	<xs:element name="presentation" type="xs:string">		<xs:element name="presentation" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed		Acceptable values (enumerations) for this type are managed
	by IANA in the "CLUE Schema &lt;presentation&gt; registry",		by IANA in the "CLUE Schema &lt;presentation&gt;" registry,
	accessible at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	The current possible values, as per the CLUE framework document		The current possible values, as per the CLUE framework document
	[RFC8845], are "slides" and "images".		[RFC8845], are "slides" and "images".
	11.20. <embeddedText>		11.20. <embeddedText>
	skipping to change at line 1420 ¶		skipping to change at line 1420 ¶
	The <sensitivityPattern> element is an optional field describing the		The <sensitivityPattern> element is an optional field describing the
	characteristics of the nominal sensitivity pattern of the microphone		characteristics of the nominal sensitivity pattern of the microphone
	capturing the audio signal. It has been specified as a simple string		capturing the audio signal. It has been specified as a simple string
	with an annotation pointing to an IANA registry that is defined ad		with an annotation pointing to an IANA registry that is defined ad
	hoc:		hoc:
	<!-- SENSITIVITY PATTERN ELEMENT -->		<!-- SENSITIVITY PATTERN ELEMENT -->
	<xs:element name="sensitivityPattern" type="xs:string">		<xs:element name="sensitivityPattern" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed by IANA		Acceptable values (enumerations) for this type are managed by
	in the "CLUE Schema <sensitivityPattern> registry", accessible		IANA in the "CLUE Schema &lt;sensitivityPattern&gt;" registry,
	at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	The current possible values, as per the CLUE framework document		The current possible values, as per the CLUE framework document
	[RFC8845], are "uni", "shotgun", "omni", "figure8", "cardioid", and		[RFC8845], are "uni", "shotgun", "omni", "figure8", "cardioid", and
	"hyper-cardioid".		"hyper-cardioid".
	13. Video Captures		13. Video Captures
	skipping to change at line 1528 ¶		skipping to change at line 1528 ¶
	represent a capture scene for a fixed media type.		represent a capture scene for a fixed media type.
	The XML schema representation of a <captureScene> element is the		The XML schema representation of a <captureScene> element is the
	following:		following:
	<!-- CAPTURE SCENE TYPE -->		<!-- CAPTURE SCENE TYPE -->
	<xs:complexType name="captureSceneType">		<xs:complexType name="captureSceneType">
	<xs:sequence>		<xs:sequence>
	<xs:element ref="description" minOccurs="0" maxOccurs="unbounded"/>		<xs:element ref="description" minOccurs="0" maxOccurs="unbounded"/>
	<xs:element name="sceneInformation" type="xcard:vcardType"		<xs:element name="sceneInformation" type="xcard:vcardType"
	minOccurs="0"/>		minOccurs="0"/>
	<xs:element name="sceneViews" type="sceneViewsType" minOccurs="0"/>		<xs:element name="sceneViews" type="sceneViewsType" minOccurs="0"/>
	<xs:any namespace="##other" processContents="lax" minOccurs="0"		<xs:any namespace="##other" processContents="lax" minOccurs="0"
	maxOccurs="unbounded"/>		maxOccurs="unbounded"/>
	</xs:sequence>		</xs:sequence>
	<xs:attribute name="sceneID" type="xs:ID" use="required"/>		<xs:attribute name="sceneID" type="xs:ID" use="required"/>
	<xs:attribute name="scale" type="scaleType" use="required"/>		<xs:attribute name="scale" type="scaleType" use="required"/>
	<xs:anyAttribute namespace="##other" processContents="lax"/>		<xs:anyAttribute namespace="##other" processContents="lax"/>
	</xs:complexType>		</xs:complexType>
	Each capture scene is identified by a "sceneID" attribute. The		Each capture scene is identified by a "sceneID" attribute. The
	skipping to change at line 1799 ¶		skipping to change at line 1799 ¶
	21. <people>		21. <people>
	Information about the participants that are represented in the media		Information about the participants that are represented in the media
	captures is conveyed via the <people> element. As it can be seen		captures is conveyed via the <people> element. As it can be seen
	from the XML schema depicted below, for each participant, a <person>		from the XML schema depicted below, for each participant, a <person>
	element is provided.		element is provided.
	<!-- PEOPLE TYPE -->		<!-- PEOPLE TYPE -->
	<xs:complexType name="peopleType">		<xs:complexType name="peopleType">
	<xs:sequence>		<xs:sequence>
	<xs:element name="person" type="personType" maxOccurs="unbounded"/>		<xs:element name="person" type="personType" maxOccurs="unbounded"/>
	</xs:sequence>		</xs:sequence>
	</xs:complexType>		</xs:complexType>
	21.1. <person>		21.1. <person>
	<person> includes all the metadata related to a person represented		<person> includes all the metadata related to a person represented
	within one or more media captures. Such element provides the vCard		within one or more media captures. Such element provides the vCard
	of the subject (via the <personInfo> element; see Section 21.1.2) and		of the subject (via the <personInfo> element; see Section 21.1.2) and
	its conference role(s) (via one or more <personType> elements; see		its conference role(s) (via one or more <personType> elements; see
	Section 21.1.3). Furthermore, it has a mandatory "personID"		Section 21.1.3). Furthermore, it has a mandatory "personID"
	attribute (Section 21.1.1).		attribute (Section 21.1.1).
	skipping to change at line 1853 ¶		skipping to change at line 1853 ¶
	The value of the <personType> element determines the role of the		The value of the <personType> element determines the role of the
	represented participant within the telepresence session organization.		represented participant within the telepresence session organization.
	It has been specified as a simple string with an annotation pointing		It has been specified as a simple string with an annotation pointing
	to an IANA registry that is defined ad hoc:		to an IANA registry that is defined ad hoc:
	<!-- PERSON TYPE ELEMENT -->		<!-- PERSON TYPE ELEMENT -->
	<xs:element name="personType" type="xs:string">		<xs:element name="personType" type="xs:string">
	<xs:annotation>		<xs:annotation>
	<xs:documentation>		<xs:documentation>
	Acceptable values (enumerations) for this type are managed		Acceptable values (enumerations) for this type are managed
	by IANA in the "CLUE Schema &lt;personType&gt; registry",		by IANA in the "CLUE Schema &lt;personType&gt;" registry,
	accessible at https://www.iana.org/assignments/clue.		accessible at https://www.iana.org/assignments/clue.
	</xs:documentation>		</xs:documentation>
	</xs:annotation>		</xs:annotation>
	</xs:element>		</xs:element>
	The current possible values, as per the CLUE framework document		The current possible values, as per the CLUE framework document
	[RFC8845], are: "presenter", "timekeeper", "attendee", "minute		[RFC8845], are: "presenter", "timekeeper", "attendee", "minute
	taker", "translator", "chairman", "vice-chairman", and "observer".		taker", "translator", "chairman", "vice-chairman", and "observer".
	A participant can play more than one conference role. In that case,		A participant can play more than one conference role. In that case,
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