EP1561213A1 - Support optique hybride a deux faces se presentant sous forme de disque (sacd/dvd) - Google Patents

Support optique hybride a deux faces se presentant sous forme de disque (sacd/dvd)

Info

Publication number
EP1561213A1
EP1561213A1 EP03773701A EP03773701A EP1561213A1 EP 1561213 A1 EP1561213 A1 EP 1561213A1 EP 03773701 A EP03773701 A EP 03773701A EP 03773701 A EP03773701 A EP 03773701A EP 1561213 A1 EP1561213 A1 EP 1561213A1
Authority
EP
European Patent Office
Prior art keywords
dvd
sacd
format
audio
data carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03773701A
Other languages
German (de)
English (en)
Inventor
Stefan Schreiber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1561213A1 publication Critical patent/EP1561213A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B2020/1087—Digital recording or reproducing wherein a selection is made among at least two alternative ways of processing

Definitions

  • Double-sided, hybrid optical disk in disk format (SACD / DVD)
  • DVD-Video as music medium, like the CD standard based on LPCM (Linear Pulse Code Modulation), but with up to 96khz / 24Bit sampling rate in stereo as well as (compressed) multi-channel formats.
  • LPCM Linear Pulse Code Modulation
  • DVD-Audio LP CM sampling frequencies up to 192khz / 24Bit for stereo, multi-channel sound 5.1 (maximum 96khz / 24Bit); lossless compression (MLP); A large number of sampling frequencies (44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz) are available with an accuracy of 16, 20 or 24 bits
  • SACD The format proposed by Philips / Sony based on DSD (Direct Stream Digital). It is a bitstream (1-bit sigma-delta modulation) with 64 times the CD sampling rate (2.8224 MHz).
  • DVD-Video Format 1 is sometimes referred to as "Digital Audio Disc” (DAD), in German as “Music DVD”.
  • DAD Digital Audio Disc
  • Music DVD German as “Music DVD”.
  • the advantage of this format is that it can be reproduced by any DVD-Video player.
  • the specifications of DVD-Video state that audio signals with a sampling frequency of 96kHz can be converted to 48khz, since many DVD players use digital-to-analog converters for 48khz.
  • Multi-channel sound (or "Surround Sound”) is defined in DVD-Video, but only in compressed form (Dolby Digital).
  • the "Digital Theater System” (DTS) which is certainly more suitable for music because it is less compressed, is only provided as an option and therefore often earlier supported by better / more expensive DVD reproducers.
  • DTS Digital Theater System
  • a special form of DTS is the relatively new DTS 96/24, which compresses LPCM channels with a sampling frequency of 96 kHz. This system is backwards compatible with the previous DTS system, i.e. DTS reproducers see a DTS data stream (sampling rate 48 kHz), while the higher frequencies are in a DTS extension stream.
  • DVD-Audio has been introduced as a format for high-definition music and is superior to DVD-Video in this regard. Thanks to lossless compression ("Meridian Lossless Packing'VMLP), a recording in 5.1 multichannel sound can be accommodated on a DVD-5 without loss of compression. Of course, a stereo version of the same music can also be offered as a second audio stream on DVD-Audio.
  • a DVD-Audio playback device fulfills a few minimum requirements in order to reproduce music in potentially higher quality than a CD player, for example they have obligatory digital-to-analog converters with a sampling frequency of at least 96 kHz.
  • DVD-Audio uses six different sampling rates, each with a dynamic accuracy of 16, 20 or 24 bits.
  • Stereo channel recordings and multi-channel versions up to six channels can be offered in different versions. It is mostly the Dolby Digital 5.1 method with a "low frequency effects" channel.
  • DVD-Audio format A more comprehensive representation of the DVD-Audio format can be found e.g. in Jim Taylor: "DVD Demystified", McGraw-Hill, 2nd ed., New York 2001, chap. 6, pp. 250f £ ISBN 0-07-135026-8.
  • DVD-Audio A "DVD-Audio" format was intended from the start when the DVD standard was defined.
  • the file system of the DVD contains a "Video Title Set” and an "Audio Title Set".
  • DVD-AudioV or DVD-AV a DVD-Audio that can also be played on a DVD-Video player and can contain, for example, a stereo recording in PCM 96khz / 24Bit and multi-channel sound in Dolby Digital format.
  • this format is sometimes referred to as "music DVD”. Since formats 1 and 2 can thus be combined, one could say that there are currently two formats for "high-resolution" digital music: formats that are based on the DVD specifications, and the Super Audio CD from Sony and Philips.
  • the SACD does not use pulse code modulation (PCM) like DVD video or audio, but is based on a "bitstream” method.
  • PCM pulse code modulation
  • the underlying coding DSD (“Direct Stream Digital”) is a 1-bit sigma-delta modulation with a sampling rate of 2.8224 MHz (64 times the CD frequency), combined with high-order noise shaping.
  • This Philips and Sony DSD format was developed just over 10 years ago for the archiving of analogue master tapes. Since archiving in CD format (44.1khz-PCM) or with DAT (48khz, accuracy up to 24-bit) was obviously not sufficient to digitally archive historical recordings on analog tapes without loss of quality, Sony and Philips searched for a format that " has more analogous "properties than conventional PCM modulation.
  • Bitstream methods and the sigma-delta modulation are of course older than the DSD method.
  • 1-bit converters have been developed for playing CDs, which can play CDs using 128- or 256-fold oversamplings, the compact disc being known to contain music in PCM format (44.1 kHz / 16 bits).
  • PCM format (44.1 kHz / 16 bits).
  • DSD is a separate format that is to be explained very briefly here.
  • the quantization noise is shifted to 5th or 7th order noise shaping in high frequency ranges.
  • the achievable dynamic bandwidth according to Philips and Sony is 120dB in the audible frequency spectrum, in my opinion about 115dB or 19 bit. A precise value can hardly be determined, the author points out that you can still hear signals with the Super Audio Compact Disc which are below the noise level of the quantization (similar to the LP, where tones can still be heard well below the analog noise level).
  • the SACD In addition to the basic DSD modulation, the SACD, like the DVD audio, has a lossless compression method for this bit stream. This process is called “Direct Stream Transfer”, abbreviated to DST.
  • the copy protection of the SACD is very well thought out and has several lines of defense against potential attackers.
  • a decoding key is modulated in a slightly varying bit width of the pits / lands in each SACD.
  • PSP-PDM "Pit Signal Processing / Physical Disc Mark”
  • SACD mark e.g. a normal DVD drive does not read the (encrypted) data of a SACD because the lead-in is already encrypted
  • a hybrid SACD / CD has been defined in the standard, in which a SACD plate has a CD layer in addition to the high-resolution SACD layer underneath.
  • the SACD layer is at a depth of about 0.6mm, the CD layer at 1.2mm, for example, as the CD standard provides.
  • the SACD layer reflects red light (approx. 20% reflection), but is very transparent to infrared light, so a CD player recognizes a CD with approx. 70% reflection.
  • the hybrid SACD / CD enables the introduction of a catalog of SACDs that can not only be bought by the currently small minority of owners of a SACD player.
  • hybrid SACD / CD is somewhat more complex and expensive than, for example, a two-layer DVD, but even more important is the fact that the global production capacity for hybrid SACDs is significantly lower compared to CDs and DVDs.
  • a proposed general introduction of the hybrid SACD as a CD replacement would currently fail due to a lack of manufacturing capacity.
  • the SACD standard according to the "Scarlet Book” (Sony / Philips, 1999) also defines a one- and two-layer version of the Super Audio CD, which are produced as DVD-5 or DVD-9. These formats are of course not backwards compatible with the CD.
  • the CD prevailed, although many CD players of the 1st generation sound objective (measuring technology) and subjectively bad from today's perspective. For example, many 1st generation converters were only 14-bit converters. CD players often had so-called brickwall filters, which cannot function without artifacts at 44.1khz sampling frequency and the display of a frequency range of 20 kHz (the sampling rate of 44.1kHz is known to represent frequencies up to 22.05 kHz) due to steep filtering. The initially poorly optimized playback quality of the CD players proves that this format presented itself as "the" future format, that it was much more practical than the vinyl record and could therefore prevail. The conventional LP remained as good as it always was, but became more of a format for audiophiles who viewed the compact disc as a mistake.
  • CD players have been successively improved in several phases and can no longer be disqualified as “low-fi”. CD playback is "good” on today's best playback devices, but in the opinion of many it is not “very good” or excellent.
  • Latest generation CD players using improved oversampling methods (“upsampling”, introduced by dCS and others with the aid of improved signal processing), new interpolation methods and digital filters, and the use of a new generation of DAC converters reaches the level of "authentic" Recordings with PCM / 96kHz closely. However, DSD is regularly classified as slightly better.
  • PCM from 96 kHz is described as a format with a high level of detail and depth, very high resolution, precise localization of instruments and sounding "analog", “open” and “natural”.
  • PCM from 96kHz is also described as “very good” with a little less depth, “drier” medium and high frequencies, but better bass than DSD (the bass range with DSD is also superior to PCM in 44.1kHz of the CD standard).
  • PCM high resolution is hardly ever called “hard” or “glassy” sounding, which would be a typical classification with (massive?) CD reproduction.
  • DVD-Audio and SACD are two really different formats that have not yet been combined on the same medium. Hessen It is obvious that many potential buyers are currently adopting a wait-and-see attitude until one format becomes established. Since both formats have their justification (DVD-Audio is the legitimate extension of the DVD-Video standard, while the Super Audio CD can indeed be regarded as an improved CD), it currently does not appear that a format is foreseeable Time will prevail as a clear winner.
  • the hybrid SACD is compatible with almost all CD players, but not with all DVD-Video reproducers, some of whom would try to reproduce what they consider to be a damaged DVD layer.
  • Hybrid DVD-Audio with CD layer was officially permitted by the DVD Forum in October 2002, but faces a serious problem. Many, if not most, conventional DVD players (for video) first try to play a CD layer, ie they would not play the DVD layer relevant to them, even if the DVD-Audio contains a DVD-Video compatible section , Of course, this is not in the sense of a hybrid DVD / CD. The success of a hybrid DVD-Audio / CD is therefore more than questionable due to the lack of backward compatibility with DVD-Video, this hybrid variant should have been defined when DVD-Audio was introduced, which was not the case.
  • a hybrid DVD-Audio / SACD player will therefore be more expensive in practice in the digital part and (and probably above all) in the analog part than a specialized player for one of these two formats.
  • CDs in DVD / SACD players proves that multifunction devices do not meet all requirements equally well, even if this should be possible in theory.
  • CD format used to convert the format used (44.1khz / 16 bit) into the respective primary format 96khz / 192khz / DSD (English: upsampling), which means only one analog path for CD playback and a better one Format is necessary.
  • Hybrid S ACD / DVD-Audio reproducers would not have it easy because of their higher price than a format-based device on the market, especially since the SACD and DVD-Audio formats are increasingly being integrated into DVD-Video players as an additional format.
  • a player that plays DVD-Video / CDs / SACDs and DVD-Audios in high quality is of course not cheap, regardless of the fact that one could of course produce reproducers with one or a few chips that "understand" these formats. Because of the necessary analog components for different audio formats, the price will always remain higher than for specialized reproducers.
  • Additional information about a hybrid SACD according to the present invention can also be accommodated on the DVD side in a separate (DVD-ROM) section which can be read and reproduced by a computer.
  • DVD-ROM DVD-ROM
  • Two-sided SACD where the second side corresponds to the standard DVD format.
  • a hybrid SACD / DVD-Audio can be realized with it, produced in one piece / track / recording in both formats and combined on the SAME sound carrier. It goes without saying that a package with a SACD and "identical" DVD-Audio is offered, but it is of course not in the interest of the record companies to sell two copies of a recording for a substantially the same price. Therefore, these SACD and DVD-Audio parts should be combined on the same data carrier, which is the case with the proposed hybrid solution.
  • a buyer of a recording of this combined format then does not have to worry whether a SACD or DVD-Audio is more future-proof, because it is logically compatible with SACD AND DVD playback devices.
  • a SACD can also be combined with a DVD-Video, a DVD-AudioV as well as with computer programs and data that are intended to be displayed on a multimedia PC. ("Enhanced SACD", SACD / DVD-ROM).
  • a SACD e.g. should have a duration of more than 80 minutes, or additional material is available on the SACD side
  • a DVD-18 could also be produced, for example likewise in the surface transfer process according to Pat. US-6117284.
  • the two-sided optical disc of the present invention appears to the inventor as one of the first really useful applications for three- and four-layer DVDs (DVD-14 and DVD-18, respectively).
  • the resulting data carrier would be producible on production lines for the hybrid SACD and potentially compatible with any of the common digital data formats for music, therefore "universal".
  • Hesse made a data medium that contains a recording in CD, SACD, DVD-Video and DVD-Audio format. Like the well-known DVDPlus, this data carrier would be a bit too thick (1.7mm), while the CD and DVD specifications allow data carriers up to a thickness of 1.5mm. CD players in particular therefore sometimes have problems with these media. Possibly.
  • Hesse make the CD layer on a 0.3mm thick substrate.
  • the CD layer would then be at a depth outside the CD audio specification (0.9mm instead of 1.2mm or the lower tolerance of 1.1mm defined in the CD standard), but the resulting double-sided disc would be approx. 1, 5mm thick, an allowed value.
  • a CD player expects a CD layer at a depth between 1.1 and 1.3 mm, a layer at 0.9 mm depth would therefore lead to a spherical aberration during playback due to the lens not being adapted to this thickness, even if it is correct sierang.
  • a SACD half side is combined with a CD layer on the second side.
  • This version corresponds to a DVDPlus, but is pointless because it is less compatible with CD players than a conventional "hybrid SACD" with a CD layer.
  • this combination could be produced on any DVD / CD line, not just on the currently few lines for the hybrid SACD.
  • a variant of this implementation would be the combination of a SACD half-disk with a hybrid DVD / CD on the opposite side. This also seems pointless, since this disk would again be approx. 1.7 mm thick and a hybrid DVD is only defined for DVD audio, and only since October 2002.
  • the proposed invention is always a two-sided format and thus potentially more susceptible to scratches than a one-sided DVD-5 or DVD-9. Without ever hearing from complaints about double-sided DVDs for videos, I think this is a potential problem.
  • substrate materials have been developed (especially for DVD-R / D VD-RW), which according to company statements (e.g. TDK) are up to 100 times more resistant to scratches than normal polycarbonate substrates, such as those used for CDs and DVDs.
  • Very durable materials for substrates are also under development for the next generation of DVD.
  • the data-carrying layer is only 0.1mm deep, so that if this data carrier is used without a cover or cartridge, even minor damage to the surface could interfere with playback.
  • the size of a hybrid SACD according to the invention can deviate from the standard (12 cm diameter), in particular smaller formats (eg 8 cm) can be played in each reproducer, since the file system of a DVD or SACD does not refer to data in the (non-existent) in this case
  • the area of the data carrier shows: A reproducer does not even notice this difference in diameter.
  • any DVD replicator that pays the corresponding license fees can already produce a hybrid SACD / DVD according to this invention without problems, at least in the DVD-10 Execution on practically every DVD production line today
  • the immediate availability of the proposed hybrid solution is an invaluable advantage for its introduction.
  • the patent fees for DVD and SACD data carriers are a few cents each. Measured against the production costs of a DVD of currently less than $ 1 / euro, these double license fees are certainly significant, but hardly against the price of high-quality music recordings, which are currently around $ 20 / euro and more for SACD and DVD-Audio.
  • SACD and DVD-Audio should clearly be positioned as higher-quality media with multi-channel sound, possibly expanded with video and interactive components. Firstly, a higher price can be charged for this, secondly, these formats are copy-protected, which should be a matter of course for a new digital format. Copy protection does not prevent any (fair, private) copy of music, which I will come back to immediately.
  • the hybrid SACD / CD always has the basic defect of missing video properties. Even if video capabilities should be better integrated into the SACD standard than before, there is simply no space on a hybrid SACD / CD, unless you omit multi-channel sound, which is quite questionable about the sense of SACD as a format for multi-channel sound would ask. One could therefore say that the SACD is simply not designed for music videos, which clearly shows the importance of a hybrid record for SACD / DVD-Video.
  • the hybrid SACD / DVD (audio and / or video) proposed by the author is cheaper to manufacture than a hybrid SACD with CD layer, at least as a DVD 10, because the coating of a semi-transparent SACD layer consists of a silicone compound (according to Philips documents ) that cannot be produced in a conventional metal vapor deposition process for the production of an aluminum, silver or gold layer.
  • the present invention presents hybrid data carriers that extend the current SACD standard.
  • SACD recordings can be combined with videos on the DVD side, so music videos can be integrated into the SACD standard, which can be displayed by normal DVD video reproducers.
  • Video properties are only rudimentarily defined in the previous SACD standard.
  • music videos in standard DVD-Video are supplemented with an audio version of the highest quality, which if possible also contains multi-channel sound without compression artifacts.
  • hybrid media can be created that contain data for SACD and DVD-Audio players. These media are future-proof, the publisher does not have to choose either the SACD or DVD format (of course, a page can be in DVD-Audio V format). In addition to the obviously larger sales market, this hybrid format makes it easier for consumers to make a purchase decision, since they do not have to reflect on which format is "better” or will win the format war mentioned.
  • the proposed hybrid SACD / DVD format appears to the inventor to be more sensible than the hybrid SACD / CD, since it clearly separates the market for CD (the cheaper format in the future) and high-resolution formats (combined), which may be very useful.
  • the hybrid SACD (just like a hybrid DVD-Audio / CD) has the disadvantage of always only comprising one high-resolution layer, so it is neither suitable for video reproduction nor for longer recording times.
  • the proposed invention could be implemented as a DVD-18 up to four layers.
  • future formats HD-DVD
  • substrates with more than two data layers e.g. FMD
  • FMD can also be integrated on the page that does not contain the SACD layer.
  • the need for media for music videos can be seen as given if one considers the success of music channels such as MTV etc.
  • the compact disc does not offer any video options, or only in the form of the video CD, which is insufficient for high quality music playback.
  • the demand for an optical disc for music videos is therefore self-evident, and the previous SACD standard is not a standard for music videos.
  • the present invention extends the SACD standard accordingly by integrating a DVD-Video layer on a Super Audio CD.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

L'invention concerne un support optique à deux faces, contenant des données sur les deux faces, dans des formats logiques et/ou physiques différents. Une face correspond aux normes d'un Super Audio CD (SACD), tandis que l'autre face contient des données dans un format différent, de préférence DVD-Vidéo et/ou DVD-Audio. Le support optique selon l'invention permet de produire un SACD/DVD-Audio hybride dont une face contient de la musique destinée à un lecteur de SACD, tandis que l'autre face est compatible avec des lecteurs de DVD-Audio. Le support optique selon l'invention permet par ailleurs de produire un SACD/DVD-Vidéo hybride dont la face SACD contient de la musique dans un format à résolution élevée, tandis que la face DVD-Vidéo combine la musique et la vidéo, ce qui semble indispensable pour une large palette de musiques (clips vidéo de pop/rock, vidéos de concerts de jazz, vidéos d'opéras, de comédies musicales, de ballets, extraits de concerts etc.).
EP03773701A 2002-11-11 2003-11-04 Support optique hybride a deux faces se presentant sous forme de disque (sacd/dvd) Withdrawn EP1561213A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10252339A DE10252339A1 (de) 2002-11-11 2002-11-11 Zweiseitiger, hybrider optischer Datenträger in Scheibenformat (SACD/DVD)
DE10252339 2002-11-11
PCT/EP2003/012265 WO2004044908A1 (fr) 2002-11-11 2003-11-04 Support optique hybride a deux faces se presentant sous forme de disque (sacd/dvd)

Publications (1)

Publication Number Publication Date
EP1561213A1 true EP1561213A1 (fr) 2005-08-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03773701A Withdrawn EP1561213A1 (fr) 2002-11-11 2003-11-04 Support optique hybride a deux faces se presentant sous forme de disque (sacd/dvd)

Country Status (6)

Country Link
US (1) US20060140108A1 (fr)
EP (1) EP1561213A1 (fr)
JP (1) JP2006505890A (fr)
AU (1) AU2003282085A1 (fr)
DE (1) DE10252339A1 (fr)
WO (1) WO2004044908A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1505600A1 (fr) * 2003-07-30 2005-02-09 Sony DADC Austria AG Support d'enregistrement en forme de disque optique
DE10351166A1 (de) * 2003-11-03 2005-06-16 Stefan Schreiber Hybrider optischer Datenträger mit modifizierter CD-Schicht
JP2007012182A (ja) 2005-06-30 2007-01-18 Sanyo Electric Co Ltd 光ディスク装置
US8103006B2 (en) * 2006-09-25 2012-01-24 Dolby Laboratories Licensing Corporation Spatial resolution of the sound field for multi-channel audio playback systems by deriving signals with high order angular terms
US7995754B2 (en) * 2007-11-30 2011-08-09 Microsoft Corporation Recordation of encrypted data to a recordable medium
TWI415122B (zh) * 2008-01-04 2013-11-11 Hon Hai Prec Ind Co Ltd 雙面型光碟片

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JPH08235641A (ja) * 1995-02-27 1996-09-13 Sony Corp 光学記録媒体とその製法
JPH08339574A (ja) * 1995-04-11 1996-12-24 Sony Corp 多層光ディスク
JP3674092B2 (ja) * 1995-08-09 2005-07-20 ソニー株式会社 再生装置
US6160787A (en) * 1996-01-11 2000-12-12 Wea Manufacturing, Inc. Multiple layer optical recording medium for use with two different wavelength laser beams
DE29824505U1 (de) * 1997-02-28 2001-05-17 Dierks Dieter Zweiseitige Hybrid-DVD-CD-Disk
JP2000353364A (ja) * 1999-06-10 2000-12-19 Sony Corp データ記録媒体、記録装置及び方法、並びに再生装置及び方法
WO2002039442A2 (fr) * 2000-11-13 2002-05-16 Dsm N.V. Compositions pour supports optiques capables de cuire par rayonnement
ITRM20010217A1 (it) * 2001-04-20 2002-10-21 Atop Innovation Spa Supporto ottico di memoria di dati a doppio strato perfezionato.

Non-Patent Citations (1)

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Title
See references of WO2004044908A1 *

Also Published As

Publication number Publication date
AU2003282085A1 (en) 2004-06-03
US20060140108A1 (en) 2006-06-29
JP2006505890A (ja) 2006-02-16
WO2004044908A1 (fr) 2004-05-27
DE10252339A1 (de) 2004-05-19

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