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Topic: Dual layer recording

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	Dual Layer DVD Mediia Introduction
		Dual layer recordable discs contain two organic dye recording layers (termed L0 and L1, respectively) between dual polycarbonate bases and semi-reflective metal layers separated by a transparent spacing layer.
		Reflectivity of both recording layers of a dual layer recordable disc is the similar: greater than 18 percent.
		The reflectivity between the L0 and L1 layers, however, is greater than 50 percent because the upper (second) recording layer absorbs and reflects some of energy that is directed at the lower (first) recording layer L0 in order for organic dye to be recorded.
	www.tigerdirect.com /static/html/DualLayerDVD3_index.html (977 words)

	Erasable optical data storage medium - Patent 4719615 (Site not responding. Last check: 2007-10-14)
		The dual layer is susceptible to expansion and contraction, to writing data thermally, to erasing data thermally and mechanically, and to reading data optically, the first material and the second material, respectively, being bonded together and remaining in the same physical state upon the expansion and relaxation of the dual layer.
		One type of optical recording that has the highest potential is an optical recording apparatus or system which uses, in lieu of the magnetic recording head, a highly focused laser beam as an ultra-fine recording stylus to write and read data at a very high data rate and recording density, and to erase the data.
		The bottom layer of material is a relatively inextensible metal or polymer having a high coefficient of thermal expansion, and the top layer is a metal alloy which is in a martensitic phase at ambient temperature and has a low coefficient of thermal expansion.
	www.freepatentsonline.com /4719615.html (7053 words)

	Dual Layer DVD Burning
		Since dual layer technology has always been part of the DVD qualifications, dual layer recording on the desktop is the natural progression of single layer 4.7GB recordable technology.
		Dual layer proficient recorders will have the capability to record on the new dual layer DVD recordable discs, and same with conventional single layer DVD discs and CDs also.
		It is on the primary recordable layer where the entire “table of contents” and system region of a dual layer recordable disc are stored.
	www.easydvdburning.com /Authoring/Dual-Layer-DVD-Burning_2.html (687 words)

	The duel of the dual-layer DVD formats - Internet - News - ZDNet Asia
		Dual-layer DVD recorders slated for PC use are expected to emerge by spring, with dual-layer recorders targeted at the consumer electronics market available later in the year, according to Hans Driessen, global communications manager for Philips' Optical Storage division.
		Arranging for both layers to be recorded in equal amounts is relatively easy in the case of data files of a known size, Driessen said.
		When a user records a television broadcast of unknown length, however, the drive may need to add "dummy" data in order for the disc to be readable in DVD players.
	www.zdnetasia.com /news/internet/0,39044246,39163045,00.htm (1367 words)

	[No title] (Site not responding. Last check: 2007-10-14)
		Recorders for both the PC and consumer electronics markets are expected to become available sometime in 2004.
		The dye-recording film layer method is similar for +R and -R. Both use a silver alloy as the reflector material in the upper layer.
		Set-top video recorders have a lot more to deal with because they are creating an application layer in real time, as opposed to computer-based tools that may do this sequentially over a more extended time.
	www.emedialive.com /Articles/ReadArticle.aspx?ArticleID=8049 (1115 words)

	Dual Layer DVD Recording
		Certainly business users will appreciate the increased storage capacity of a dual layer DVD recordable disc when distributing a large amount of data on a single disc is needed, and even for desktop system backup and single server backup with time and cost savings over traditional tape technologies.
		Because double layer recordable discs are basically one contiguous stream of block addresses, it’s not very difficult for software makers to make their disc mastering software compatible with dual layer drives and media, as least where recording data is concerned.
		This “layer jump” is typically not visible when you watch a DVD movie even though there is a very brief interruption to allow the player to focus on the second layer.
	www.dvd-software.info /dvd-articles/dual-layer/dvd-recording.php (1462 words)

	VideoHelp.com Forum Archive - Dual Layer Recording - I Think It Sucks
		The manual says that once the first layer is recorded you cannot continue the recording on the second layer unless you close the first layer.
		Since recording on a disc is not a question of the speed of the disc spinning then it would also stand to reason that SP/LP/EP modes would mean lowering the bitrate to get more recording material on the same amount of disc space.
		As far as dual layer I am not big on that so it isn't going to be a problem with me for some time to come.
	www.videohelp.com /forum/archive/t304536.html (3670 words)

	DVD+RW Alliance - New dual-layer DVD+R technology developed by Philips in cooperation with MKM increases DVD recordable ...
		Heating with a focused laser beam irreversibly modifies the physical and chemical structure of each layer such that the modified areas have different optical properties to those of their unmodified surroundings.
		In addition, the transmission of the upper recording layer is greater than 50% to allow for read-out and recording of the lower recording layer.
		Recorders for both the PC and consumer electronics markets are expected to become available during the course of 2004.
	www.dvdrw.com /press/duallayer.htm (1000 words)

	Sony DRU-700A Dual-Layer DVD Burner: The 50 Percent Solution
		Dual layer disks consist of two layers of dye substrate separated by a semi-transparent metal layer.
		Burning the lower layer is performed by refocusing the laser beam so that it passes through the first layer, through the partially reflective metal layer, and down to the lower dye layer.
		When the upper layer needs to be written, the laser is then focused on that layer, and the metal layer serves to block whatever excess energy might exist.
	www.extremetech.com /article2/0,1558,1594129,00.asp (648 words)

	Layer - Wikipedia, the free encyclopedia
		A layer hen, a hen raised to produce eggs.
		Stratum, a layer of rock or soil with internally consistent characteristics.
		Layer de la Haye is a village in Essex, United Kingdom.
	en.wikipedia.org /wiki/Layer (215 words)

	DVD-Burner-Software.com - Understanding Dual Layer DVD Recording
		Dual layer DVD recordable discs offer up to four hours of high quality MPEG-2 video, or up to 8.5GB of data on a single sided disc with two individual recordable “layers”.
		Dual layer capable recorders will have the ability to record on the new dual layer DVD recordable discs as well as traditional single laye
		When a dual layer recordable disc is inserted into a dual layer compliant recorder, the optics will focus the laser at one of the dual layers to try and detect an “Address In Pregroove” (ADIP) signal.
	www.dvd-burner-software.com /Dual-Layer-DVD-Recording.html (1545 words)

	Pioneer Dual-Layer DVD-R
		The new dual-layer recording technology, adopting the dye-recording-film layer method, has realized a 9.34% jitter with a 17.3% reflection rate on the first layer (L0) of a disc, and an 8.08% jitter with a 19.5% reflection rate for the second layer (L1).
		In the rapidly growing DVD recorder market, there has been a strong need from users for longer hours, yet high picture quality DVD disc recording.
		Pioneer's new technology will allow the users to record programs of up to about 4 hours in the SP mode, or programs of up to about 12 hours in the EP mode with DVD recorders.
	www.dvdburning.biz /News/pioneer_dual-layer_dvd-r.htm (222 words)

	DVD - Wikipedia, the free encyclopedia
		DVD-R DL (dual layer — see figure) was developed for the DVD Forum by Pioneer Corporation, DVD+R DL (double layer — see figure) was developed for the DVD+RW Alliance by Philips and Mitsubishi Kagaku Media (MKM).
		A Dual Layer disc differs from its usual DVD counterpart by employing a second physical layer within the disc itself.
		This situation—multiple new formats fighting as the successor to a format approaching purported obsolescence—previously appeared as the "war of the speeds" in the record industry of the 1950s.
	en.wikipedia.org /wiki/Dual_layer_recording (1590 words)

	creativepro.com - FujiFilm Introduces DVD+R Double Layer Media (Site not responding. Last check: 2007-10-14)
		Each recording layer consists of a "wobbled pre-groove" track that controls the rotation speed and addressing for that layer.
		The make up of the recording dye is very important to its ability to receive a pulse of energy from the laser that records the digitized data - while the disc is spinning at a very high speed.
		While a spacer layer separates the two recording layers to prevent cross layer recording, the dye formulation and recording "grooves" in dual layer discs must be optimized to minimize error.
	www.creativepro.com /story/news/21819.html (702 words)

	CDFreaks.com \| news\| pioneer demonstrates dual layer recording at ces only firmware modification needed
		Pioneer has demonstrated dual layer burning during the CES, the technology exhibition in Las Vegas.
		The DVD-R dual layer specifications have not yet been passed by the DVD Forum.
		I suppose that for burning two layers the lens of the laser has to be bi-focal: one position to focuse on each layer.
	www.cdfreaks.com /news/8861 (696 words)

	Sonic News > Sonic Announces Support for DVD-R Dual Layer Recording
		Sonic JumpSafeT- selects the ideal title set layout and layer break point with precisely filled error-correction blocks to ensure optimum video playback and to avoid the frame stutter and visual distortion that commonly occurs in DVDs authored on standard formatting systems when the MPEG data streams are interrupted during layer switch.
		DVD-R Dual Layer versions of Sonic's consumer products are expected to ship in January and will be included in bundles from major drive and PC manufacturers starting in the first quarter of 2005.
		Sonic AuthorScript with Dual Layer support will be released to selected licensing partners in the PC and consumer electronics markets in the first quarter of 2005.
	www.sonic.com /about/press/news/2004/december/dl_recording.aspx (834 words)

	BurnWorld - Understanding Dual Layer DVD9 Burning
		While consumers around the world have enjoyed burning their own DVDs for a few years now, the inevitable question of “what’s next” is now upon the industry.
		Because dual layer technology has always been part of the DVD specifications, dual layer DVD recording on the desktop is the natural progression of single layer 4.7GB recordable technology.
		Because a recorded dual layer DVD disc is compliant with the DVD9 specification, the discs are compatible with most consumer DVD players and computer DVD-ROM drives already installed in the market.
	www.burnworld.com /howto/articles/intro-to-dual-layer.htm (350 words)

	VideoHelp.com Forum Archive - Dual Layer Disk Recording Hurdles
		We will see 2.4x recorders as early as this spring and it seems the plus camp of HP, Phillips and Dell is going to market first.
		What you need to consider is that dual layer burning is basicly a new format, so compatibility between the 2 remains to be seen.
		I meant longer recording times at best quality mode when I said that, not that higher than current max bitrates will be available.
	www.videohelp.com /forum/archive/t196416.html (1315 words)

	Dual-layer Recording Technology for DVD-R - Pioneer Europe
		The new dual-layer recording technology, which adopts the dye-recording-film layer method, achieves a 9.34 percent jitter with a 17.3 percent reflection rate on the first layer (L0) of a disc, and an 8.08 percent jitter with a 19.5 percent reflection rate for the second layer (L1).
		In the rapidly expanding DVD recorder market, strong end user demand has emerged for DVD media that offers greater recording capacity with improved picture quality.
		Pioneer's new technology will allow users to record programmes of up to four hours in standard play mode, or up to 12 hours in the extended play mode with DVD recorders.
	www.pioneer.co.uk /eur/content/press/news_07102003_dvdr_dual_layer.html (330 words)

	BurningBits.com :: Double Layer recording
		DVD X Copy Platinum on other hand only state that they may be able to handle dual layer recording.
		Well clonedvd2 from elby does in fact allow dual layered burns but to date i have been un able to burn one.I have an LG dual layered 12x burner (+ and-) and the media i am using is dvd+r DL verbatim discs(8.5 gig)
		I can change the size to 8134 meg and the dvd rom will read the disc but i still find when i go to burn that the disc is still to small.I have tried imputting 8450 meg but also at that size the disc is still to small.
	www.burningbits.com /forum/viewtopic.php?p=1852 (377 words)

	DUAL LAYER MEDIA RECORDING PROBLEMS
		I have a Plexter DVD recorder and I am having trouble producing dual layer recordings.
		Many DVD burners have problems with the area around the Layer Break in dual layer media, and as a resuly they do not burn correctly.
		I suggest you upgrade to the latest Nero, and considering you are using crappy media, try burning it at the slowest speed.
	forums.afterdawn.com /thread_view.cfm/438329 (763 words)

	CDFreaks.com \| news\| pioneer reveals some dual layer disk recording hurdles
		Once read, the whole article is very good information for us that are curious about dual layer writing technology.
		Pioneer demonstrates dual layer recording at CES, only firmware modification...
		As with all other things, dual layer burning would progress much faster and accurately if all those concerned adopted a "lets work together" rather than a "lets be first to market" attitude.........
	www.cdfreaks.com /news/Pioneer-reveals-some-dual-layer-disk-recording-hurdles.html (861 words)

	Samsung DVD Recorder w/HDMI ouput & +R dual layer recording DVDR145 InStock
		A front-panel DV (FireWire IEEE 1394) input enables you to connect the family video camcorder and edit and record footage directly to a DVD disc--all via a single cable and without losing image quality.
		You can program recording via the timer, or choose easy one-touch recording (initiating playback at 30 minutes and adding 30 minutes with each additional press of the button, up to the available disc time or 240 minutes, whichever is sooner).
		Chapters are created when you record your favorite TV show or video clips from a camcorder onto a DVD disc.
	www.wholesaleconnection.com /productDetails.aspx?Product=3557 (655 words)

	TiVo Community Forums Archives - Pioneer Develops DVD-R Dual-layer Recording Technology
		All DVD-burners can obviously change angles of the lens since they have to be able to read dual layer discs, but I wonder what else is involved.
		Still hope with -R: According to Pioneer, a dual-layer DVD-R recorder would need to be developed to record on DVD-R dual layer discs, but as they are still working on this technology, this may still change.
		Although considering the price of DVD recorders these days, it may not be all that bad to have to replace mine when these become available.
	archive.tivocommunity.com /tivo-vb/history/topic/136157-1.html (1326 words)

	Dual layer dvd recording - Sheffield Forum
		Dual layer disks (8.5gb) cost around £4.50 each.
		but dual layer is expensive, and slow, not to mention the compatability with DVD players is very bad.
		well to copy a dual layer DVD you would use a piece of software to rip the DVD to your hard drive and de-crypt it because all DVD's are encrypted...
	www.sheffieldforum.co.uk /showthread/t-33846.html (334 words)

	Verbatim DL Dual Layer DVD+R 8.5GB
		DataLifePlus DVD+R discs incorporate Verbatim’s proprietary Metal Azo recording dye technology, fine-tuned to produce exceptional results at the highest write speeds, while maintaining compatibility with lower speed recording devices and assuring long archival lifetimes for important data.
		Two AZO recording layers on a single-sided disc
		The new 2.4x DataLifePlus(R) media nearly doubles the storage capacity on DVD recordable discs from 4.7GB to 8.5GB on a single side while maintaining compatibility with existing DVD video players and DVD-ROM drives.
	www.labelgear.com /LG/Product.asp?ProdCode=30310 (228 words)

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