DSM-CC Object Carousel Protocol - Revision history

CityK: DSM-CC ObjectCarousel Protocol moved to DSM-CC Object Carousel Protocol: name

2008-01-17T16:29:49Z

DSM-CC ObjectCarousel Protocol moved to DSM-CC Object Carousel Protocol: name

← Older revision

Revision as of 16:29, 17 January 2008

CityK: Correct all ObjectCarousel to "Object Carousel" ... don't know why the original authour used a conjoined word, as I don't see such in any other references

2008-01-17T16:26:39Z

Correct all ObjectCarousel to "Object Carousel" ... don't know why the original authour used a conjoined word, as I don't see such in any other references

CityK: minor edits

2008-01-17T16:21:27Z

minor edits

← Older revision		Revision as of 16:21, 17 January 2008
Line 1:		Line 1:
	[[Image:OC-ProtoLayers.png\|right]]		[[Image:OC-ProtoLayers.png\|right]]
-	The [[DSM-CC\|DSM-CC standard/toolkit]] defines or extends five distinct protocols to cover the many different aspects of broadband service delivery. One of those five includes the "Download" Protocol, which itself contains several variations that detail the transfer of content from a server to a client, either within the [[MPEG-2 Transport Stream\|MPEG-2 TS]] or independently in a separate channel. One of these "Download" protocol variations is an autonomous "data carousel", and an extension to the data carousel itself is the "object carousel".	+	The [[DSM-CC\|DSM-CC standard/toolkit]], which is Part 6 of the [[MPEG-2 Standard]], defines or extends five distinct protocols to cover the many different aspects of broadband service delivery. One of those five includes the "Download" Protocol, which itself contains several variations that detail the transfer of content from a server to a client, either within the [[MPEG-2 Transport Stream\|MPEG-2 TS]] or independently in a separate channel. One of these "Download" protocol variations is an autonomous "data carousel", and an extension to the data carousel itself is the "object carousel".

-	Stated another way, the DSM-CC ObjectCarousel ~~protocol is a~~ '''broadcast protocol~~'''~~ on top of ~~'''MPEG2'''~~. It is used for transmission of filesystem hierarchies over a ~~MPEG2~~ channel. Like other protocols (NFS, SAMBA etc. via IP), the ObjectCarousel protocol allows mounting of external filesystems that are broadcast within a ~~MPEG2~~ program. Of particular interest is its use for the application of interactive multimedia formats, such as [[MHP]] or [[MHEG-5]], for [[Digital TV]] services.	+	Stated another way, the '''DSM-CC ObjectCarousel Protocol''' is a broadcast protocol on top of MPEG-2. It is used for transmission of filesystem hierarchies over a MPEG-2 channel. Like other protocols (NFS, SAMBA etc. via IP), the ObjectCarousel protocol allows mounting of external filesystems that are broadcast within a MPEG-2 program. Of particular interest is its use for the application of interactive multimedia formats, such as [[MHP]] or [[MHEG-5]], for [[Digital TV]] services.

-	== '''A.''' ~~MPEG2~~ Transport Stream ==	+	== '''A.''' MPEG-2 Transport Stream ==

	Basically, to mount an ObjectCarousel, of course you have to know where to find it.		Basically, to mount an ObjectCarousel, of course you have to know where to find it.
Line 14:		Line 14:

	As you can see, an ObjectCarousel '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to		As you can see, an ObjectCarousel '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to
-	the same '''CarouselID'''), and there is nothing more special to say about the ~~MPEG2~~ layer of the ObjectCarousel protocol.	+	the same '''CarouselID'''), and there is nothing more special to say about the MPEG-2 layer of the ObjectCarousel protocol.
	TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual '''PrivateSection''' format.		TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual '''PrivateSection''' format.

CityK: some reworking

2008-01-17T16:17:44Z

some reworking

← Older revision		Revision as of 16:17, 17 January 2008
Line 1:		Line 1:
-	The DSM-CC ~~ObjectCarousel protocol is a '''broadcast protocol''' on top~~ of ~~'''MPEG2'''~~.	+	[[Image:OC-ProtoLayers.png\|right]]
-	~~It is used for transmission~~ of ~~filesystem hierarchies over~~ a ~~MPEG2~~ channel.	+	The [[DSM-CC\|DSM-CC standard/toolkit]] defines or extends five distinct protocols to cover the many different aspects of broadband service delivery. One of those five includes the "Download" Protocol, which itself contains several variations that detail the transfer of content from a server to a client, either within the [[MPEG-2 Transport Stream\|MPEG-2 TS]] or independently in a separate channel. One of these "Download" protocol variations is an autonomous "data carousel", and an extension to the data carousel itself is the "object carousel".

-	Like other protocols (NFS, SAMBA etc. via IP), the ObjectCarousel protocol	+	Stated another way, the DSM-CC ObjectCarousel protocol is a '''broadcast protocol''' on top of '''MPEG2'''. It is used for transmission of filesystem hierarchies over a MPEG2 channel. Like other protocols (NFS, SAMBA etc. via IP), the ObjectCarousel protocol allows mounting of external filesystems that are broadcast within a MPEG2 program. Of particular interest is its use for the application of interactive multimedia formats, such as [[MHP]] or [[MHEG-5]], for [[Digital TV]] services.
-	allows mounting of external filesystems that are broadcast within a MPEG2 program.	+
-		+
-	[[~~Image:OC~~-~~ProtoLayers.png~~]]	+

	== '''A.''' MPEG2 Transport Stream ==		== '''A.''' MPEG2 Transport Stream ==
Line 22:		Line 19:
	== '''B.''' Data Carousel ==		== '''B.''' Data Carousel ==

-	[[Image:OC-LayerDC.png]]	+	[[Image:OC-LayerDC.png\|right]]

-	The '''PMT''' points to elementary streams with '''StreamType 0xb''', on which DSM-CC streams are located, but that does not mean a DataCarousel is really there.	+	The '''PMT''' points to elementary streams with '''StreamType 0xb''', on which DSM-CC streams are located, but that does not mean a DataCarousel is really there. You can find various descriptors in the '''2nd ES-loop''' of the PMT which indicate the presence of a DataCarousel, e.g. the '''DataBroadcastDescriptor''' and '''CarouselIDDescriptor'''. The latter one associates a DataCarousel with a '''CarouselID''', so that an ObjectCarousel can include multiple DataCarousels, each one located on a separate elementary stream.
-	You can find various descriptors in the '''2nd ES-loop''' of the PMT which indicate the presence of a DataCarousel, e.g. the '''DataBroadcastDescriptor''' and '''CarouselIDDescriptor'''.	+
-	The latter one associates a DataCarousel with a '''CarouselID''', so that an ObjectCarousel can include multiple DataCarousels, each one located on a separate elementary stream.	+

	Well then, you already know all elementary streams including a DataCarousel, but what pieces of data are broadcast there and how to filter them?		Well then, you already know all elementary streams including a DataCarousel, but what pieces of data are broadcast there and how to filter them?
Line 32:		Line 27:
	A DataCarousel includes at least one '''Download Control Message''' which is repeated more frequently than the broadcast data.		A DataCarousel includes at least one '''Download Control Message''' which is repeated more frequently than the broadcast data.
	This message is called '''DII''' ('''D'''ownload'''I'''nfo'''I'''ndication) and describes a set of data belonging to the broadcast DataCarousel.		This message is called '''DII''' ('''D'''ownload'''I'''nfo'''I'''ndication) and describes a set of data belonging to the broadcast DataCarousel.
		+

	== '''C.''' Object Carousel ==		== '''C.''' Object Carousel ==

		+	WIP


-	~~WIP~~	+	==External Links==
-		+	* [[Wikipedia:DSM CC\|Wikipedia's DSM-CC article]]
		+	* [http://www.interactivetvweb.org/tutorial/dtv-intro/dsm-cc/index.shtml An article covering the IDTV aspects of DSM-CC]

	[[Category:Technology]]		[[Category:Technology]]

Guidod: +cat

2005-04-02T22:37:56Z

+cat

← Older revision		Revision as of 22:37, 2 April 2005
Line 38:		Line 38:

	WIP		WIP
		+
		+
		+	[[Category:Technology]]

Mass at 18:24, 6 October 2004

2004-10-06T18:24:38Z

← Older revision		Revision as of 18:24, 6 October 2004
Line 30:		Line 30:
	Well then, you already know all elementary streams including a DataCarousel, but what pieces of data are broadcast there and how to filter them?		Well then, you already know all elementary streams including a DataCarousel, but what pieces of data are broadcast there and how to filter them?

-	A DataCarousel includes at least one '''Control-Message''' which is repeated more frequently than the broadcast data.	+	A DataCarousel includes at least one '''Download Control Message''' which is repeated more frequently than the broadcast data.
	This message is called '''DII''' ('''D'''ownload'''I'''nfo'''I'''ndication) and describes a set of data belonging to the broadcast DataCarousel.		This message is called '''DII''' ('''D'''ownload'''I'''nfo'''I'''ndication) and describes a set of data belonging to the broadcast DataCarousel.

Mass at 15:41, 6 October 2004

2004-10-06T15:41:22Z

← Older revision		Revision as of 15:41, 6 October 2004
Line 1:		Line 1:
-	The DSM-CC ObjectCarousel protocol is a broadcast protocol on top of MPEG2.	+	The DSM-CC ObjectCarousel protocol is a '''broadcast protocol''' on top of '''MPEG2'''.
	It is used for transmission of filesystem hierarchies over a MPEG2 channel.		It is used for transmission of filesystem hierarchies over a MPEG2 channel.

Mass: /* '''A.''' MPEG2 Transport Stream */

2004-10-06T15:36:34Z

'''A.''' MPEG2 Transport Stream

← Older revision		Revision as of 15:36, 6 October 2004
Line 18:		Line 18:
	As you can see, an ObjectCarousel '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to		As you can see, an ObjectCarousel '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to
	the same '''CarouselID'''), and there is nothing more special to say about the MPEG2 layer of the ObjectCarousel protocol.		the same '''CarouselID'''), and there is nothing more special to say about the MPEG2 layer of the ObjectCarousel protocol.
-	TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual '''PrivateSection ~~format~~'''.	+	TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual '''PrivateSection''' format.

	== '''B.''' Data Carousel ==		== '''B.''' Data Carousel ==

Mass: /* '''A.''' MPEG2 Transport Stream */

2004-10-06T15:34:35Z

'''A.''' MPEG2 Transport Stream

← Older revision		Revision as of 15:34, 6 October 2004
Line 14:		Line 14:

	First, given a stream location on dvb://ONID.TSID.SID, you have to tune to the service and check some (P)SI tables		First, given a stream location on dvb://ONID.TSID.SID, you have to tune to the service and check some (P)SI tables
-	for presence of an ObjectCarousel there (which tables is the subject of the next ~~layer~~).	+	for presence of an ObjectCarousel there (which tables is the subject of the next layers).

	As you can see, an ObjectCarousel '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to		As you can see, an ObjectCarousel '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to
-	the same CarouselID), and there is nothing more special to say about the MPEG2 layer of the ObjectCarousel protocol.	+	the same '''CarouselID'''), and there is nothing more special to say about the MPEG2 layer of the ObjectCarousel protocol.
-	TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual PrivateSection format.	+	TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual '''PrivateSection format'''.

	== '''B.''' Data Carousel ==		== '''B.''' Data Carousel ==

Mass: /* '''B.''' Data Carousel */

2004-10-06T15:31:22Z

'''B.''' Data Carousel

← Older revision		Revision as of 15:31, 6 October 2004
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	The latter one associates a DataCarousel with a '''CarouselID''', so that an ObjectCarousel can include multiple DataCarousels, each one located on a separate elementary stream.		The latter one associates a DataCarousel with a '''CarouselID''', so that an ObjectCarousel can include multiple DataCarousels, each one located on a separate elementary stream.

-	Well then, you already know all elementary streams including a DataCarousel, but what data is broadcast there and how to filter it?	+	Well then, you already know all elementary streams including a DataCarousel, but what pieces of data are broadcast there and how to filter them?

		+	A DataCarousel includes at least one '''Control-Message''' which is repeated more frequently than the broadcast data.
		+	This message is called '''DII''' ('''D'''ownload'''I'''nfo'''I'''ndication) and describes a set of data belonging to the broadcast DataCarousel.

	== '''C.''' Object Carousel ==		== '''C.''' Object Carousel ==

← Older revision		Revision as of 16:26, 17 January 2008
Line 2:		Line 2:
	The [[DSM-CC\|DSM-CC standard/toolkit]], which is Part 6 of the [[MPEG-2 Standard]], defines or extends five distinct protocols to cover the many different aspects of broadband service delivery. One of those five includes the "Download" Protocol, which itself contains several variations that detail the transfer of content from a server to a client, either within the [[MPEG-2 Transport Stream\|MPEG-2 TS]] or independently in a separate channel. One of these "Download" protocol variations is an autonomous "data carousel", and an extension to the data carousel itself is the "object carousel".		The [[DSM-CC\|DSM-CC standard/toolkit]], which is Part 6 of the [[MPEG-2 Standard]], defines or extends five distinct protocols to cover the many different aspects of broadband service delivery. One of those five includes the "Download" Protocol, which itself contains several variations that detail the transfer of content from a server to a client, either within the [[MPEG-2 Transport Stream\|MPEG-2 TS]] or independently in a separate channel. One of these "Download" protocol variations is an autonomous "data carousel", and an extension to the data carousel itself is the "object carousel".

-	Stated another way, the '''DSM-CC ~~ObjectCarousel~~ Protocol''' is a broadcast protocol on top of MPEG-2. It is used for transmission of filesystem hierarchies over a MPEG-2 channel. Like other protocols (NFS, SAMBA etc. via IP), the ~~ObjectCarousel~~ protocol allows mounting of external filesystems that are broadcast within a MPEG-2 program. Of particular interest is its use for the application of interactive multimedia formats, such as [[MHP]] or [[MHEG-5]], for [[Digital TV]] services.	+	Stated another way, the '''DSM-CC Object Carousel Protocol''' is a broadcast protocol on top of MPEG-2. It is used for transmission of filesystem hierarchies over a MPEG-2 channel. Like other protocols (NFS, SAMBA etc. via IP), the Object Carousel protocol allows mounting of external filesystems that are broadcast within a MPEG-2 program. Of particular interest is its use for the application of interactive multimedia formats, such as [[MHP]] or [[MHEG-5]], for [[Digital TV]] services.

	== '''A.''' MPEG-2 Transport Stream ==		== '''A.''' MPEG-2 Transport Stream ==

-	Basically, to mount an ~~ObjectCarousel~~, of course you have to know where to find it.	+	Basically, to mount an Object Carousel, of course you have to know where to find it.

	[[Image:OC-LayerMPEG.png]]		[[Image:OC-LayerMPEG.png]]

	First, given a stream location on dvb://ONID.TSID.SID, you have to tune to the service and check some (P)SI tables		First, given a stream location on dvb://ONID.TSID.SID, you have to tune to the service and check some (P)SI tables
-	for presence of an ~~ObjectCarousel~~ there (which tables is the subject of the next layers).	+	for presence of an Object Carousel there (which tables is the subject of the next layers).

-	As you can see, an ~~ObjectCarousel~~ '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to	+	As you can see, an Object Carousel '''can''' be distributed over multiple PIDs (i.e. all elemantary streams belong to
-	the same '''CarouselID'''), and there is nothing more special to say about the MPEG-2 layer of the ~~ObjectCarousel~~ protocol.	+	the same '''CarouselID'''), and there is nothing more special to say about the MPEG-2 layer of the Object Carousel protocol.
	TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual '''PrivateSection''' format.		TS-Packets are merged into Sections as usual, and DSMCC-Sections also follow the usual '''PrivateSection''' format.

Line 21:		Line 21:
	[[Image:OC-LayerDC.png\|right]]		[[Image:OC-LayerDC.png\|right]]

-	The '''PMT''' points to elementary streams with '''StreamType 0xb''', on which DSM-CC streams are located, but that does not mean a DataCarousel is really there. You can find various descriptors in the '''2nd ES-loop''' of the PMT which indicate the presence of a DataCarousel, e.g. the '''DataBroadcastDescriptor''' and '''CarouselIDDescriptor'''. The latter one associates a DataCarousel with a '''CarouselID''', so that an ~~ObjectCarousel~~ can include multiple DataCarousels, each one located on a separate elementary stream.	+	The '''PMT''' points to elementary streams with '''StreamType 0xb''', on which DSM-CC streams are located, but that does not mean a DataCarousel is really there. You can find various descriptors in the '''2nd ES-loop''' of the PMT which indicate the presence of a DataCarousel, e.g. the '''DataBroadcastDescriptor''' and '''CarouselIDDescriptor'''. The latter one associates a DataCarousel with a '''CarouselID''', so that an Object Carousel can include multiple DataCarousels, each one located on a separate elementary stream.

	Well then, you already know all elementary streams including a DataCarousel, but what pieces of data are broadcast there and how to filter them?		Well then, you already know all elementary streams including a DataCarousel, but what pieces of data are broadcast there and how to filter them?