Anatomy of V4L-DVB devices - Revision history

CityK: DVB section formating; add link to Devin's article on KernalLabs website

2010-04-12T21:46:55Z

DVB section formating; add link to Devin's article on KernalLabs website

CityK: moved Anatomy of a DVB device to Anatomy of V4L-DVB devices: name; merged (sparse) content of former "anatomy of a V4L device" article (which has been retired to the Archive)

2010-04-12T21:37:22Z

moved Anatomy of a DVB device to Anatomy of V4L-DVB devices: name; merged (sparse) content of former "anatomy of a V4L device" article (which has been retired to the Archive)

← Older revision

Revision as of 21:37, 12 April 2010

CityK: add content from the "anatomy of a V4L device" article which has been archived

2010-04-12T21:31:36Z

add content from the "anatomy of a V4L device" article which has been archived

← Older revision		Revision as of 21:31, 12 April 2010
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		+	==Anatomy of a V4L device==
		+
		+
		+	==Anatomy of a DVB device==
	Digital Video Broadcast receivers exist in many different flavours. This page lists some of the common receiver types, in order to give you an idea of what all is supported by the linuxtv dvb drivers and why some things within the linuxtv driver code look quite complicated.		Digital Video Broadcast receivers exist in many different flavours. This page lists some of the common receiver types, in order to give you an idea of what all is supported by the linuxtv dvb drivers and why some things within the linuxtv driver code look quite complicated.

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	* Technotrend/Hauppauge [[Hauppauge DEC2540-T USB\|DEC2540-T USB]]		* Technotrend/Hauppauge [[Hauppauge DEC2540-T USB\|DEC2540-T USB]]
	* Technotrend/Hauppauge [[Hauppauge DEC3000-S USB\|DEC3000-S USB]]		* Technotrend/Hauppauge [[Hauppauge DEC3000-S USB\|DEC3000-S USB]]
		+
		+
		+	==External Links==
		+	* [http://en.wikipedia.org/wiki/TV_tuner_card Wikipedia discussion of TV tuner cards]
		+	* [http://dl.ivtvdriver.org/datasheets/ Some datasheets for some chips used on V4L hardware]
		+	* [[Wikipedia:Frame grabber\|Wikipedia's Frame grabber article]]
		+	* [[Wikipedia:Video capture\|Wikipedia's Video Capture article]]
		+	* [[Wikipedia:Video processing expansion card\|Wikipedia's Video processing expansion card article]]

	[[Category:Development]]		[[Category:Development]]

CityK: fixed link

2008-12-09T05:08:49Z

fixed link

← Older revision		Revision as of 05:08, 9 December 2008
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	== [[STB]]s with interface to the PC ==		== [[STB]]s with interface to the PC ==

-	Have an integrated embedded processor with MPEG-2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[~~Firewire~~]] port to record and play back DVB transmissions on your TV.	+	Have an integrated embedded processor with MPEG-2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[FireWire]] port to record and play back DVB transmissions on your TV.

	* Technotrend/Hauppauge [[Hauppauge DEC2000-T USB\|DEC2000-T USB]]		* Technotrend/Hauppauge [[Hauppauge DEC2000-T USB\|DEC2000-T USB]]

CityK: /* STBs with interface to the PC */ add link

2008-11-15T02:50:31Z

STBs with interface to the PC: add link

← Older revision		Revision as of 02:50, 15 November 2008
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	Have an integrated embedded processor with MPEG-2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[Firewire]] port to record and play back DVB transmissions on your TV.		Have an integrated embedded processor with MPEG-2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[Firewire]] port to record and play back DVB transmissions on your TV.

-	* Technotrend/Hauppauge [[Hauppauge DEC2000-T USB\|DEC2000-T USB]]	+	* Technotrend/Hauppauge [[Hauppauge DEC2000-T USB\|DEC2000-T USB]]
		+	* Technotrend/Hauppauge [[Hauppauge DEC2540-T USB\|DEC2540-T USB]]
	* Technotrend/Hauppauge [[Hauppauge DEC3000-S USB\|DEC3000-S USB]]		* Technotrend/Hauppauge [[Hauppauge DEC3000-S USB\|DEC3000-S USB]]

	[[Category:Development]]		[[Category:Development]]

CityK: minor edits

2008-01-07T19:16:10Z

minor edits

← Older revision		Revision as of 19:16, 7 January 2008
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-	~~== Introduction ==~~	+	Digital Video Broadcast receivers exist in many different flavours. This page lists some of the common receiver types, in order to give you an idea of what all is supported by the linuxtv dvb drivers and why some things within the linuxtv driver code look quite complicated.
-		+
-	Digital Video Broadcast ~~Receivers~~ exist in many different flavours. In order to give you an idea of what we all ~~support with~~ the ~~linux-~~dvb drivers and why some things look quite complicated ~~this page lists the common types:~~	+

	== Minimal Configuration ==		== Minimal Configuration ==

-	A minimal device for [[DVB]] reception at the PC consists of a [[~~DVB~~ Frontend]] and some [[Wikipedia:FIFO\|FIFO Memory]]. This FIFO samples the [[MPEG-2 Transport Stream]] delivered by the frontend and makes it accessible (e.g. by a port-interface, memory-mapped or a bus-interface like USB or [[IEEE1394]]) to the host processor.	+	A minimal device for [[DVB]] reception at the PC consists of a [[Frontend\|frontend]] and some [[Wikipedia:FIFO\|FIFO Memory]]. This FIFO samples the [[MPEG-2 Transport Stream]] delivered by the frontend and makes it accessible (e.g. by a port-interface, memory-mapped or a bus-interface like USB or [[IEEE1394]]) to the host processor.

	All modern peripheral DVB devices follow this approach: common [[PCI]] cards, nearly all [[USB]] adapters and [[IEEE1394]] DVB devices. Only they are supported directly by Microsoft's [[BDA]] architecture.		All modern peripheral DVB devices follow this approach: common [[PCI]] cards, nearly all [[USB]] adapters and [[IEEE1394]] DVB devices. Only they are supported directly by Microsoft's [[BDA]] architecture.
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	== PCI Cards with onboard MPEG-2 Decoder ==		== PCI Cards with onboard MPEG-2 Decoder ==

-	Here the [[~~DVB~~ Frontend]] is connected to the [[TI AV711x\|AV711x]] hardware [[MPEG-2 Decoder]]. This decoder	+	Here the [[Frontend\|frontend]] is connected to the [[TI AV711x\|AV711x]] hardware [[MPEG-2 Decoder]]. This decoder
	shares a dualported RAM with the PCI bridge where the MPEG-2 Decoder has its		shares a dualported RAM with the PCI bridge where the MPEG-2 Decoder has its
	[[Wikipedia:Framebuffer:Framebuffer\|Video Framebuffer]]. '''(1)'''		[[Wikipedia:Framebuffer:Framebuffer\|Video Framebuffer]]. '''(1)'''

CityK: fixed links

2008-01-06T22:57:44Z

fixed links

CityK: fixed links

2008-01-06T21:35:33Z

fixed links

CityK: fixed links

2007-07-04T03:49:44Z

fixed links

← Older revision		Revision as of 03:49, 4 July 2007
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	Have an integrated embedded processor with MPEG2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[Firewire]] port to record and play back DVB transmissions on your TV.		Have an integrated embedded processor with MPEG2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[Firewire]] port to record and play back DVB transmissions on your TV.

-	* Technotrend/Hauppauge [[DEC2000-~~T_USB~~]]	+	* Technotrend/Hauppauge [[Hauppauge DEC2000-T USB\|DEC2000-T USB]]
-	* Technotrend/Hauppauge [[DEC3000-~~S_USB~~]]	+	* Technotrend/Hauppauge [[Hauppauge DEC3000-S USB\|DEC3000-S USB]]

	[[Category:Development]]		[[Category:Development]]

CityK: fixed links

2007-02-10T19:35:11Z

fixed links

← Older revision		Revision as of 19:35, 10 February 2007
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	Examples:		Examples:
	* [[DVB-S_PCI_Cards\|full-featured DVB-S PCI Cards]]		* [[DVB-S_PCI_Cards\|full-featured DVB-S PCI Cards]]
-	* [[DVB-~~C_cards~~#DVB-C_full-featured_Cards\|full-featured DVB-C Cards]]	+	* [[DVB-C_PCI_Cards#DVB-C_full-featured_Cards\|full-featured DVB-C Cards]]
-	* [[DVB-~~T_cards~~#DVB-T_full-featured_Cards\|full-featured DVB-T Cards]]	+	* [[DVB-T_PCI_Cards#DVB-T_full-featured_Cards\|full-featured DVB-T Cards]]

	The Onboard Decoder makes these cards somewhat expensive.		The Onboard Decoder makes these cards somewhat expensive.

← Older revision		Revision as of 21:46, 12 April 2010
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	Digital Video Broadcast receivers exist in many different flavours. This page lists some of the common receiver types, in order to give you an idea of what all is supported by the linuxtv dvb drivers and why some things within the linuxtv driver code look quite complicated.		Digital Video Broadcast receivers exist in many different flavours. This page lists some of the common receiver types, in order to give you an idea of what all is supported by the linuxtv dvb drivers and why some things within the linuxtv driver code look quite complicated.

-	== Minimal Configuration ==	+	=== Minimal Configuration ===

	A minimal device for [[DVB]] reception at the PC consists of a [[Frontend\|frontend]] and some [[Wikipedia:FIFO\|FIFO Memory]]. This FIFO samples the [[MPEG-2 Transport Stream]] delivered by the frontend and makes it accessible (e.g. by a port-interface, memory-mapped or a bus-interface like USB or [[IEEE1394]]) to the host processor.		A minimal device for [[DVB]] reception at the PC consists of a [[Frontend\|frontend]] and some [[Wikipedia:FIFO\|FIFO Memory]]. This FIFO samples the [[MPEG-2 Transport Stream]] delivered by the frontend and makes it accessible (e.g. by a port-interface, memory-mapped or a bus-interface like USB or [[IEEE1394]]) to the host processor.
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	All modern peripheral DVB devices follow this approach: common [[PCI]] cards, nearly all [[USB]] adapters and [[IEEE1394]] DVB devices. Only they are supported directly by Microsoft's [[BDA]] architecture.		All modern peripheral DVB devices follow this approach: common [[PCI]] cards, nearly all [[USB]] adapters and [[IEEE1394]] DVB devices. Only they are supported directly by Microsoft's [[BDA]] architecture.

-	== PCI Cards with onboard MPEG-2 Decoder ==	+	=== PCI Cards with onboard MPEG-2 Decoder ===

	Here the [[Frontend\|frontend]] is connected to the [[TI AV711x\|AV711x]] hardware [[MPEG-2 Decoder]]. This decoder		Here the [[Frontend\|frontend]] is connected to the [[TI AV711x\|AV711x]] hardware [[MPEG-2 Decoder]]. This decoder
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	(demultiplexed from the stream), etc.		(demultiplexed from the stream), etc.

-	== Standalone STB ==	+	=== Standalone STB ===

	In a [[SetTopBox]] the Frontend directly feeds the built-in hostprocessor (usually with onchip MPEG Decoder). These processors are mostly based on embedded ARM-, MIPS-, PowerPC-Cores with additional peripheral units like i2c-, IDE-, network-, Smartcardcontrollers, Demultiplexers, Decoders, Audio- and Videointerface.		In a [[SetTopBox]] the Frontend directly feeds the built-in hostprocessor (usually with onchip MPEG Decoder). These processors are mostly based on embedded ARM-, MIPS-, PowerPC-Cores with additional peripheral units like i2c-, IDE-, network-, Smartcardcontrollers, Demultiplexers, Decoders, Audio- and Videointerface.
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	Modern STB processor chipsets move more and more decoder tasks into [[Firmware]] or software, this allows implementation of new codecs like DivX, [[wikipedia:MPEG-4\|MPEG-4]], WMV and even late updates of products in the field. We expect that this evolution continues.		Modern STB processor chipsets move more and more decoder tasks into [[Firmware]] or software, this allows implementation of new codecs like DivX, [[wikipedia:MPEG-4\|MPEG-4]], WMV and even late updates of products in the field. We expect that this evolution continues.

-	== [[STB]]s with interface to the PC ==	+	=== [[STB]]s with interface to the PC ===

	Have an integrated embedded processor with MPEG-2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[FireWire]] port to record and play back DVB transmissions on your TV.		Have an integrated embedded processor with MPEG-2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[FireWire]] port to record and play back DVB transmissions on your TV.
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	* [http://en.wikipedia.org/wiki/TV_tuner_card Wikipedia discussion of TV tuner cards]		* [http://en.wikipedia.org/wiki/TV_tuner_card Wikipedia discussion of TV tuner cards]
	* [http://dl.ivtvdriver.org/datasheets/ Some datasheets for some chips used on V4L hardware]		* [http://dl.ivtvdriver.org/datasheets/ Some datasheets for some chips used on V4L hardware]
		+	* [http://www.kernellabs.com/blog/?cat=46 KernalLabs' How Tuners Work article]
	* [[Wikipedia:Frame grabber\|Wikipedia's Frame grabber article]]		* [[Wikipedia:Frame grabber\|Wikipedia's Frame grabber article]]
	* [[Wikipedia:Video capture\|Wikipedia's Video Capture article]]		* [[Wikipedia:Video capture\|Wikipedia's Video Capture article]]

← Older revision		Revision as of 22:57, 6 January 2008
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	== PCI Cards with onboard MPEG-2 Decoder ==		== PCI Cards with onboard MPEG-2 Decoder ==

-	Here the [[DVB Frontend]] is connected to the [[AV711x]] hardware [[MPEG-2 Decoder]]. This decoder	+	Here the [[DVB Frontend]] is connected to the [[TI AV711x\|AV711x]] hardware [[MPEG-2 Decoder]]. This decoder
	shares a dualported RAM with the PCI bridge where the MPEG-2 Decoder has its		shares a dualported RAM with the PCI bridge where the MPEG-2 Decoder has its
	[[Wikipedia:Framebuffer:Framebuffer\|Video Framebuffer]]. '''(1)'''		[[Wikipedia:Framebuffer:Framebuffer\|Video Framebuffer]]. '''(1)'''
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	'''(1)''' With more detail:<br>		'''(1)''' With more detail:<br>
-	The AV711x have his own framebufers on the onboard '''SDRAM''', for MPEG '''I''' and '''P'''	+	The [[TI AV711x\|AV711x]] have his own framebufers on the onboard '''SDRAM''', for MPEG '''I''' and '''P'''
	frames, whose contents are sent to the OSD unit for overlay windows; the OSD unit output is then		frames, whose contents are sent to the OSD unit for overlay windows; the OSD unit output is then
	encoded on PAL or NTSC display formats and output in CVBS (Composite+Video+Blanking+Synchronism)		encoded on PAL or NTSC display formats and output in CVBS (Composite+Video+Blanking+Synchronism)
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	colour space conversion, etc), is sent by PCI Bus Mastering to the Video Framebuffer, normaly on		colour space conversion, etc), is sent by PCI Bus Mastering to the Video Framebuffer, normaly on
	a VGA card or in main memory for a V4L application. The dualported RAM ('''DPRAM'''), which is		a VGA card or in main memory for a V4L application. The dualported RAM ('''DPRAM'''), which is
-	connected to the AV711x and to the PCI bridge, is used for all the communications between the	+	connected to the [[TI AV711x\|AV711x]] and to the PCI bridge, is used for all the communications between the
-	DVB drivers and the AV711x: To send the firmware and commands, to send MPEG-2 DVR streams (to be	+	DVB drivers and the [[TI AV711x\|AV711x]]: To send the firmware and commands, to send MPEG-2 DVR streams (to be
	decoded and show as video/audio), to receive MPEG-2 TS packets, PES data or sections		decoded and show as video/audio), to receive MPEG-2 TS packets, PES data or sections
	(demultiplexed from the stream), etc.		(demultiplexed from the stream), etc.

← Older revision		Revision as of 21:35, 6 January 2008
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	== Minimal Configuration ==		== Minimal Configuration ==

-	A minimal device for [[DVB]] reception at the PC consists of a [[DVB Frontend]] and some [[Wikipedia:FIFO\|FIFO Memory]]. This FIFO samples the [[~~MPEG2~~ Transport Stream]] delivered by the frontend and makes it accessible (e.g. by a port-interface, memory-mapped or a bus-interface like USB or [[IEEE1394]]) to the host processor.	+	A minimal device for [[DVB]] reception at the PC consists of a [[DVB Frontend]] and some [[Wikipedia:FIFO\|FIFO Memory]]. This FIFO samples the [[MPEG-2 Transport Stream]] delivered by the frontend and makes it accessible (e.g. by a port-interface, memory-mapped or a bus-interface like USB or [[IEEE1394]]) to the host processor.

	All modern peripheral DVB devices follow this approach: common [[PCI]] cards, nearly all [[USB]] adapters and [[IEEE1394]] DVB devices. Only they are supported directly by Microsoft's [[BDA]] architecture.		All modern peripheral DVB devices follow this approach: common [[PCI]] cards, nearly all [[USB]] adapters and [[IEEE1394]] DVB devices. Only they are supported directly by Microsoft's [[BDA]] architecture.

-	== PCI Cards with onboard MPEG Decoder ==	+	== PCI Cards with onboard MPEG-2 Decoder ==

-	Here the [[DVB Frontend]] is connected to the [[AV711x]] hardware [[~~MPEG2~~ Decoder]]. This decoder	+	Here the [[DVB Frontend]] is connected to the [[AV711x]] hardware [[MPEG-2 Decoder]]. This decoder
-	shares a dualported RAM with the PCI bridge where the ~~MPEG2~~ Decoder has its	+	shares a dualported RAM with the PCI bridge where the MPEG-2 Decoder has its
	[[Wikipedia:Framebuffer:Framebuffer\|Video Framebuffer]]. '''(1)'''		[[Wikipedia:Framebuffer:Framebuffer\|Video Framebuffer]]. '''(1)'''

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	a VGA card or in main memory for a V4L application. The dualported RAM ('''DPRAM'''), which is		a VGA card or in main memory for a V4L application. The dualported RAM ('''DPRAM'''), which is
	connected to the AV711x and to the PCI bridge, is used for all the communications between the		connected to the AV711x and to the PCI bridge, is used for all the communications between the
-	DVB drivers and the AV711x: To send the firmware and commands, to send ~~MPEG2~~ DVR streams (to be	+	DVB drivers and the AV711x: To send the firmware and commands, to send MPEG-2 DVR streams (to be
-	decoded and show as video/audio), to receive ~~MPEG2~~ TS packets, PES data or sections	+	decoded and show as video/audio), to receive MPEG-2 TS packets, PES data or sections
	(demultiplexed from the stream), etc.		(demultiplexed from the stream), etc.

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	In a [[SetTopBox]] the Frontend directly feeds the built-in hostprocessor (usually with onchip MPEG Decoder). These processors are mostly based on embedded ARM-, MIPS-, PowerPC-Cores with additional peripheral units like i2c-, IDE-, network-, Smartcardcontrollers, Demultiplexers, Decoders, Audio- and Videointerface.		In a [[SetTopBox]] the Frontend directly feeds the built-in hostprocessor (usually with onchip MPEG Decoder). These processors are mostly based on embedded ARM-, MIPS-, PowerPC-Cores with additional peripheral units like i2c-, IDE-, network-, Smartcardcontrollers, Demultiplexers, Decoders, Audio- and Videointerface.

-	Modern STB processor chipsets move more and more decoder tasks into [[Firmware]] or software, this allows implementation of new codecs like DivX, [[wikipedia:~~MPEG4~~\|~~MPEG4~~]], WMV and even late updates of products in the field. We expect that this evolution continues.	+	Modern STB processor chipsets move more and more decoder tasks into [[Firmware]] or software, this allows implementation of new codecs like DivX, [[wikipedia:MPEG-4\|MPEG-4]], WMV and even late updates of products in the field. We expect that this evolution continues.

	== [[STB]]s with interface to the PC ==		== [[STB]]s with interface to the PC ==

-	Have an integrated embedded processor with ~~MPEG2~~ Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[Firewire]] port to record and play back DVB transmissions on your TV.	+	Have an integrated embedded processor with MPEG-2 Decoder and are able to work standalone. You can connect your PC, e.g. using the [[USB]] or [[Firewire]] port to record and play back DVB transmissions on your TV.

	* Technotrend/Hauppauge [[Hauppauge DEC2000-T USB\|DEC2000-T USB]]		* Technotrend/Hauppauge [[Hauppauge DEC2000-T USB\|DEC2000-T USB]]