CN1466135A - High density information storage medium - Google Patents
High density information storage medium Download PDFInfo
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- CN1466135A CN1466135A CNA021224811A CN02122481A CN1466135A CN 1466135 A CN1466135 A CN 1466135A CN A021224811 A CNA021224811 A CN A021224811A CN 02122481 A CN02122481 A CN 02122481A CN 1466135 A CN1466135 A CN 1466135A
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Abstract
The invention is a kind of high-density information storing media, the invention upgrades the data density of unit area through decreasing the material area which represents the 1 bit, in order to increase the data storing capacity in unit area of information storing media; the invention increases the data storing density of unit area and the capacity through increasing the density of data tracks (namely reducing the interval of tracks) and reducing the data bit length of the stored of data tracks (namely reducing the interval of tracks) and reducing the data bit length of the stored information. The invention can produce high density CD disk with current equipment, at the same time, the invention can match with current optical lens to read the high density CD disk.
Description
Technical field
The present invention relates to a kind of high density information storage medium, particularly a kind of high density information storage medium with short data bit length and closeer track bar gauge.
Background technology
Along with the arriving of information and multimedia era, comprise that 3C (Computer, Communication, the Consumer Electronics) product of computing machine, communication, consumer electronics also constantly increases the storage density of medium and the demand of capacity.At present with regard to optical information storage medium, with nineteen eighty-two Holland Philips (Philips) company and the CD worked out of the Red Book of Sony (Sony) company co-present (Compact Disk, CD) specification is the most general popularly accepts and is extensive use of.
Because the arriving of the increasingly extensive and digital times of multimedia application, it is more and more higher to the requirement of image and audio to add the user, and therefore, the high storage density of data storage medium and the demand of high power capacity also increase thereupon.Especially in the performance of digital audio-video, the discs of CD specification can not satisfy use.With present the most general videodisc (Video Compact Disk, VCD), its image quality can not show a candle to general video-tape, and a slice videodisc only can be stored 1 hour image and sound program, and a common movie length was at least more than 90 minutes, thereby made multi-disc dress videodisc increase.Also increased simultaneously the puzzlement of necessary replacing disc in the use.
In order to meet the requirement of multimedia era for the audiovisual quality, Dutch Philips company and Sony corporation of Japan realize agreement, have proposed digital versatile disc (DigitalVersatile Disc, DVD) specification jointly in April, 1996 with other manufacturer.With the capacity of storage numerical data, DVD discs monolithic capacity is about 4.7GB (Gigabyte), is about the monolithic capacity of 650MB (Megabyte) compared to the CD discs, significantly promotes on capacity.So the DVD discs on the purposes of digital audio-video, not only can significantly promote the sound and the image quality of broadcast, make an appointment with simultaneously and can store 133 minutes high-quality film.So since nineteen ninety-six, can cooperate and read and the hardware of DVD playing back disc also enters the consumption market and becomes one of main product gradually.Also develop simultaneously and many relevant DVD specifications, the tolerable gauge scope that No. 5777981 patent case of the U.S. of Japan company of Toshiba (Toshiba) promptly proposes the DVD discs is (0.72 to 0.8) * (λ/NA)/1.4 micron (μ m), with numerical aperture (NA) is that 0.6 object lens and wavelength are 650 rice (nm) how, and its gauge is 0.68 to 0.76 micron (μ m).By the DVD specification that DVD Forum (DVD forum, research and development DVD-RW, the DVD-R that is made up of hardware manufacturer and the international organization of DVD-RAM form) is announced, its gauge be 0.74 micron promptly in this scope.
Yet broadcast pattern and pursue higher audio-visual ornamental quality in order to integrate present signal of video signal, (High-Definition Television, HDTV) play-back technology has become the state-of-the-art at present pattern of broadcasting to high definition television.Therefore having produced brand-new audiovisual standard, promptly is the HDTV signal of high image quality and high tone quality.HDTV is that a kind of new video shows specification, and it can be supported 1,920 * 1,080 resolution, use the renewal frequency (renewal frequency of television system is 24 or 30 at present) of 16: 9 display screen of length breadth ratio and per second 30 or 60 pictures.Simultaneously also cause discs memory capacity to become bottleneck once again, the DVD discs of capacity 4.7GB is if be used for storing the high image quality film of HDTV signal, and it only can be stored less than 40 minutes, therefore, enter high image quality epoch of HDTV in future, the use of DVD discs will be restricted greatly.
Summary of the invention
In view of above prior art problems, the object of the present invention is to provide a kind of high density information storage medium to improve its data capacity.Increase the memory data output of information storage medium unit area, just must dwindle the material area of representing 1 (bit) to improve the packing density of unit area.High density information storage medium of the present invention is to increase the density (promptly reducing the track bar spacing) of track bar and reduce data bit length, with the density of data storage that increases unit area and promote its capacity.
For achieving the above object, high density information storage medium provided by the present invention comprises: a substrate, in order to reading and storing of information to be provided; And a plurality of track bars, being formed at substrate surface, each a plurality of track bar has a plurality of signal pits, keep a suitable gauge between each track bar, this gauge is 0.61 micron to 0.67 micron, and a plurality of signal pits have a minimum length, and this minimum length is 0.28 micron to 0.47 micron.Wherein, high density information storage medium of the present invention also comprises best track bar gauge, and its gauge is 0.64 micron; Simultaneously more can cooperate the technology of high record efficiency, as use 8/15 modulator approach (8/15modulation) and can make data bit length be reduced to 0.250 micron.
In addition, the disclosed high density information storage medium of the present invention can be a high density compact disc sheet, and this high density compact disc sheet can cooperate present general discs processing procedure to make and a large amount of productions, therefore, can reduce equipment and cost in a large number.Simultaneously, this high density compact disc sheet more can be compatible with the employed computer hardware of present DVD discs, promptly cooperates present dvd pickup read/write head promptly to can read the information of high density compact disc sheet provided by the present invention.For ordinary consumer, need not to increase again the cost of computer hardware.After the gauge of reduction track bar, the single-surface single-layer capacity of high density compact disc sheet of the present invention can reach 5.4GB.Simultaneously, cooperate error correcting code (ECC) technology of 8/15 Modulation technology and higher record efficiency, then can promote the single-surface single-layer capacity and reach 6GB approximately.Make multilayer and two-sided discs as the process technique of using again now.The high density compact disc sheet capacity Yue Keda 11GB of single-surface double-layer; The high density compact disc sheet capacity Yue Keda 12GB of two-sided individual layer; And the high density compact disc sheet of two-sided bilayer more is pushed into capacity about 22GB.Cooperate more its memory capacity of the compress technique of high compression ratio (as the MPEG4 technology) ought be able to improve again backward.
The disclosed high density information storage medium of the present invention system utilizes closeer track bar gauge, makes its high density information storage medium can produce bigger storage density in area identical.For being described in more detail feature of the present invention and implementation method, conjunction with figs. mark and preferred embodiment are described in detail as follows.
Description of drawings
Fig. 1 is the high density compact disc sheet synoptic diagram of the embodiment of the invention;
Fig. 2 is the high density compact disc sheet track synoptic diagram of the embodiment of the invention;
Fig. 3 A is the micro-enlarged drawing of track bar of the high density compact disc sheet of the embodiment of the invention;
Fig. 3 B is the micro-enlarged drawing of the track bar of DVD discs;
Fig. 4 is the eye pattern of the high density compact disc sheet of the embodiment of the invention;
Fig. 5 is the eye pattern of DVD discs;
Fig. 6 A is the eye pattern photo of the data on the high density compact disc sheet that reads the embodiment of the invention with the dvd pickup read head;
Fig. 6 B is for reading the eye pattern photo of the data on the DVD discs with the dvd pickup read head; And
Fig. 7 is the comparison diagram of radiofrequency signal (RFSignal) benchmark of the high density compact disc sheet of the embodiment of the invention and DVD discs.
Embodiment
The embodiment of the invention is a high density DVD discs.The diameter of general DVD discs is 120 millimeters, and the single-surface single-layer capacity is about 4.7GB, and the track bar gauge is 0.74 micron (μ m), and the signal pit minimum length is 0.4 micron (μ m), and data bit length is 0.267 micron (μ m).The employed optical maser wavelength of its optical read head is 650 rice (nm) how, and the numerical aperture of object lens is 0.6.The high density compact disc sheet outward appearance of the embodiment of the invention has specific diameter and substrate thickness as the DVD discs.Fig. 1 is the high density compact disc sheet synoptic diagram of the embodiment of the invention, and the high density compact disc sheet of the embodiment of the invention includes: a substrate 10, in order to reading and storing of information to be provided; And a plurality of track bars 20, being formed at substrate surface, each track bar is made of a plurality of signal pit around one week of disc center.Fig. 2 is the high density compact disc sheet track bar synoptic diagram of the embodiment of the invention; Be a gauge 25 that keeps suitable between each track bar 20, gauge is 0.64 micron; And have a plurality of signal pits 30 in each track bar 20 respectively, and each signal pit 30 has different signal pit length 35, and its minimum length is 0.4 micron.The embodiment of the invention more can cooperate 8/15 modulator approach, makes data bit length be reduced to 0.250 micron, and the while is also adopted error correcting code (ECC) technology.Fig. 3 A is the micro-enlarged drawing of track bar of the high density compact disc sheet of the embodiment of the invention, and Fig. 3 B then is the micro-enlarged drawing of the track bar of DVD discs.It is higher that comparison diagram 3A and Fig. 3 B can with the naked eye obviously tell the track bar density of high density compact disc sheet of the embodiment of the invention.
The high density compact disc sheet of the embodiment of the invention can utilize existing discs process apparatus to make, and does not need to increase extra processing procedure and equipment facility, therefore can reduce production costs.Simultaneously and the optical maser wavelength that can use the dvd pickup read head to use be 650 how the numerical aperture of rice (nm) and object lens be 0.6, the direct action that the high density compact disc sheet of the embodiment of the invention is read.
Fig. 4 is the eye pattern (Eye-Pattern) of the high density compact disc sheet of the embodiment of the invention.Utilize optical read head to read data on the discs, the formed luminous point of calculating optical read head, and with luminous point CD is scanned; Its original simulating signal is after multiple scanning, and resulting waveform promptly is general so-called eye pattern.Its transverse axis representative be the time, the longitudinal axis then is the representation signal amplitude.Fig. 5 is the eye pattern of DVD discs, and Fig. 6 A is the eye pattern photo of the data on the high density compact disc sheet that reads the embodiment of the invention with the dvd pickup read head, and Fig. 6 B is for reading the eye pattern photo of the data on the DVD discs with the dvd pickup read head; By comparison to Fig. 4 and Fig. 5 and Fig. 6 A and Fig. 6 B, please refer to Fig. 7 simultaneously, the comparison diagram of the high density compact disc sheet of the embodiment of the invention and the radiofrequency signal of DVD discs (RF Signal) benchmark, can learn that by above comparative result signal sensitivity that the high density compact disc sheet is read with the dvd pickup read head and distinguishing ability and DVD discs are approaching.The high density compact disc sheet of promptly representing the embodiment of the invention can be compatible with the present employed hardware of DVD discs system, as playback equipment etc.
Wherein, the track bar gauge of the high density compact disc sheet of the embodiment of the invention can be 0.61 micron to 0.67 micron, and its a plurality of signal pits are to have a minimum length, and minimum length can be 0.28 micron to 0.47 micron.
In addition, the diameter of high density compact disc sheet of the present invention can be 80 millimeters or 120 millimeters, and the error amount of the diameter of its high density compact disc sheet is less than 5 percent.Its high density compact disc sheet can be the multi-layered high-density discs with more than one recording layer and more than one reflection horizon.In addition, high density compact disc sheet of the present invention also can be the two-sided high density compact disc sheet with more than one recording layer and more than one reflection horizon.Table 1
| Parameter | The DVD specification | The high density compact disc sheet | ||||
| Single-surface single-layer | Single-surface double-layer | Single-surface single-layer | Single-surface double-layer | Two-sided individual layer | Two-sided bilayer | |
| Numerical aperture of objective | ??0.6 | ??0.6 | ??0.6 | ??0.6 | ??0.6 | ??0.6 |
| Lasing light emitter wavelength (how rice) | ??650 | ??650 | ??650 | ??650 | ??650 | ??650 |
| Track bar gauge (micron) | ??0.74 | ??0.74 | ??0.64 | ??0.64 | ??0.64 | ??0.64 |
| Data bit length (micron) | ??0.267 | ??0.293 | ??0.250 | ??0.275 | ??0.250 | ??0.275 |
| Signal pit minimum length (micron) | ??0.40 | ??0.44 | ??0.40 | ??0.44 | ??0.40 | ??0.44 |
| Disc diameter (millimeter) | ??120 | ??120 | ??120 | ??120 | ??120 | ??120 |
| Substrate thickness (millimeter) | ??1.2 | ??1.2 | ??1.2 | ??1.2 | ??1.2 | ??1.2 |
| Data capacity (GB) | ??4.7 | ??8.5 | ??6.0 | ??11.0 | ??12.0 | ??22.0 |
The disclosed high density information storage medium of the present invention utilizes the density that increases track bar to increase memory capacity.Not only can use existing discs production equipment and come volume production high density compact disc sheet, the computer hardware that can use the DVD discs simultaneously reads the high density compact disc sheet.In addition, cooperate the error-correcting code technique of 8/15 modulator approach and higher record efficiency, the high density compact disc sheet capacity of single-surface single-layer can be promoted to 6.0GB.And its data capacity can make memory data output realize tens of GB by the high density compact disc sheet of making sandwich constructions such as single-surface double-layer, two-sided individual layer and two-sided bilayer.Please refer to table 1, its be the specification of DVD discs and individual layer of the present invention and multi-layered high-density discs set and volume ratio.
In addition, the present invention more can cooperate the more compress technique of high compression ratio (as the MPEG4 technology) again, and its memory capacity is when improving again.Be not equipped with owing to do not need to increase new hardware, this high density compact disc chip system not only is easy to be accepted by discs manufacturer, also is easy to be accepted by the consumer again.
Though preferred embodiment of the present invention discloses as above; yet it is not in order to limit the present invention; those of ordinary skill in the art; without departing from the spirit and scope of the present invention; can carry out variation and retouching that various think ofs easily reach, so protection scope of the present invention should being as the criterion with the claim scope definition.
Claims (17)
1. high density information storage medium is characterized in that comprising:
One substrate is in order to provide reading and storing of information; And
A plurality of track bars are formed at this substrate surface, and each this track bar is made of a plurality of signal pit around one week of disc center, respectively keep a suitable gauge between this track bar, and the scope of this gauge is 0.61 micron to 0.67 micron.
2. high density information storage medium as claimed in claim 1 is characterized in that described a plurality of signal pit has a minimum length, and the scope of this minimum length is 0.28 micron to 0.47 micron.
3. high density information storage medium as claimed in claim 1 is characterized in that described a plurality of signal pit has a minimum length, and the preferred values of this minimum length is 0.4 micron.
4. high density information storage medium as claimed in claim 1 is characterized in that described gauge is 0.64 micron.
5. high density information storage medium as claimed in claim 1 is characterized in that described substrate has a recording layer or a plurality of recording layer.
6. high density information storage medium as claimed in claim 1 wherein also comprises and uses 8/15 modulator approach to shorten data bit length.
7. high density information storage medium as claimed in claim 1 wherein also comprises the employing error-correcting code technique.
8. high density compact disc sheet is characterized in that comprising:
One substrate is in order to provide reading and storing of information; And
A plurality of track bars are formed at this substrate surface, and each this track bar is made of a plurality of signal pit around one week of disc center, respectively keep a suitable gauge between this track bar, and this gauge is 0.61 micron to 0.67 micron.
9. high density compact disc sheet as claimed in claim 8 is characterized in that described a plurality of signal pit has a minimum length, and the scope of this minimum length is 0.28 micron to 0.47 micron.
10. high density compact disc sheet as claimed in claim 8 is characterized in that described a plurality of signal pit has a minimum length, and the preferred values of this minimum length is 0.4 micron.
11. high density compact disc sheet as claimed in claim 8 is characterized in that described gauge is 0.64 micron.
12. high density compact disc sheet as claimed in claim 8, the diameter that it is characterized in that described high density compact disc sheet be 120 millimeters with 80 millimeters one of them, the error amount of the diameter of this high density compact disc sheet is less than positive and negative 5 percent.
13. high density compact disc sheet as claimed in claim 8 is characterized in that described substrate has a recording layer.
14. high density compact disc sheet as claimed in claim 8 is characterized in that described high density compact disc sheet is the multi-layered high-density discs with more than one recording layer and more than one reflection horizon.
15. high density compact disc sheet as claimed in claim 8 is characterized in that described high density compact disc sheet is the two-sided high density compact disc sheet with more than one recording layer and more than one reflection horizon.
16. high density compact disc sheet as claimed in claim 8 wherein also comprises and uses 8/15 modulator approach to shorten data bit length.
17. high density compact disc sheet as claimed in claim 8 wherein also comprises the employing error-correcting code technique.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101432394A CN101197145A (en) | 2002-06-05 | 2002-06-05 | High density information storage medium |
| CNA021224811A CN1466135A (en) | 2002-06-05 | 2002-06-05 | High density information storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021224811A CN1466135A (en) | 2002-06-05 | 2002-06-05 | High density information storage medium |
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|---|---|---|---|
| CNA2007101432394A Division CN101197145A (en) | 2002-06-05 | 2002-06-05 | High density information storage medium |
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| Publication Number | Publication Date |
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| CN1466135A true CN1466135A (en) | 2004-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101432394A Pending CN101197145A (en) | 2002-06-05 | 2002-06-05 | High density information storage medium |
| CNA021224811A Pending CN1466135A (en) | 2002-06-05 | 2002-06-05 | High density information storage medium |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007101432394A Pending CN101197145A (en) | 2002-06-05 | 2002-06-05 | High density information storage medium |
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| CN (2) | CN101197145A (en) |
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- 2002-06-05 CN CNA2007101432394A patent/CN101197145A/en active Pending
- 2002-06-05 CN CNA021224811A patent/CN1466135A/en active Pending
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| CN101197145A (en) | 2008-06-11 |
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