CN1178971A - Disc detector and method - Google Patents
Disc detector and method Download PDFInfo
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- CN1178971A CN1178971A CN 97101075 CN97101075A CN1178971A CN 1178971 A CN1178971 A CN 1178971A CN 97101075 CN97101075 CN 97101075 CN 97101075 A CN97101075 A CN 97101075A CN 1178971 A CN1178971 A CN 1178971A
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Abstract
An optical disk reproducing apparatus having playback systems of CD and DVD containing their respective sync signals. The systems respectively have sync detectors , and analyze a sync signal output from the sync detectors when a disk is detected to be mounted. The CD playback system is selectively driven when a CD sync signal is detected to perform a CD playback mode, and the DVD playback system is selectively driven when a DVD sync signal is detected to perform a DVD playback mode.
Description
The present invention relates to a kind of apparatus for replaying disc and method, relate to the apparatus and method of the type of institute's sabot in the automatic checkout equipment especially, so that reset multiple dish.
Usually, realize that with laser beam the representative of the CD that noncontact is read is mini disk (to call CD in the following text).But, for the dish record/playback device, at a high speed, can override and the requirement of high density (high capacity) more and more higher.Simultaneously, for digital video compaction technique, oneself becomes more practical to MPEG (Moving Picture Experts Group).Thereby the digital motion picture dish as digital video disc (DVD) will become the important medium that multimedia is stored.
Fig. 1 is the DVD player block scheme.In the figure, dish 20 is high density compact discs, can be DVD here.Pickup unit 111 is shortwave optical heads.Suppose and adopt that numerical aperture is 0.6, the red laser diode wavelength.Signal amplifier 112 amplifies after the light signal of pickup unit 111 outputs is converted to electric signal.The modulation signal of detuner/ECC demoder 113 restituted signal amplifiers 112 outputs, and proofread and correct the mistake that during playback, produces.The output (even linear velocity control signal) of the output of servo controller 114 receiving signal amplifiers 112 (focusing on and the trail-and-error signal) and detuner/ECC demoder 113 is so that control pickup unit 111.System decoder 116 decodings are from the DVD data stream of detuner/ECC demoder 113 outputs.This data stream is divided into video (unit) data stream and audio frequency (unit) data stream.
The video data stream of Video Decoder 117 decode system demoders 116 outputs.So that it can be converted into the video data form that can reset.Scrambler 118 becomes corresponding video display mode (NTSC or PAL) to the video data encoding of Video Decoder 117 outputs, then its output is shown.Audio decoder 119 converts the audio data stream of system decoder 116 coding outputs to raw data.D/A converter 120 becomes simulated audio signal to the data-switching of audio decoder 119 outputs.In Fig. 1, be used for the system controller of whole work of console panel replay device, be not shown.
DVD player as top structure is used modulation technique, and error correction and video coding are different from common CD Player, and therefore, their signal processing method is completely different.The pit of DVD and CD is different with track pitch, and the optical maser wavelength of their pickup unit 111 and the numerical aperture of object lens also are different.
In the DVD record/playback apparatus importantly in order to obtain the size that high density need reduce focus.For reaching this purpose, at first to shorten Wavelength of Laser, second will strengthen the numerical aperture of object lens, and the 3rd will have the modulation technique of high code efficiency.The DVD optical maser wavelength here is the wavelength 650～635nm of red semiconductor laser.The numerical aperture of object lens is 0.6 and adopts EFM-Plus (Eight toFourteen Modulation Plus) modulation technique.
For playback information from high density compact disc, pickup unit 111 should be able to form a little focus.The wavelength X that the diameter of focus is shared the same light is directly proportional, and is inversely proportional to the numerical aperture of object lens, as shown in Figure 2.The lower limit of semiconductor laser wavelength is about 635nm as mentioned above.In general, the DVD standard of the optical maser wavelength of 650nm, and the CD optical maser wavelength of 780nm as it.The numerical aperture of DVD is 0.6, and the numerical aperture of CD is 0.45.Therefore, the diameter of DVD focus is the about more than 60% of CD focus diameter.Therefore, DVD can be with about 2.6 times of acquisitions playback signal identical with the signal of CD of the recording density of CD.DVD improves the waveform of playback signal by the processing of side circuit, thereby the recording density that it is had is about 4.2 times of CD.
The characteristic of DVD and CD is shown in following table 1.
Table 1
| ????CD | ????DVD | Note | |
| The dish diameter | ????120nm | ????120nm | DVD is a double-sided multi-layer |
| Disc thickness | ????1.2nm | ????0.6nm | |
| Recording capacity | ????640Mbyte | ????4.7Gbyte | Under the single-surface single-layer situation |
| Optical maser wavelength | ????780nm | ????650nm | |
| The numerical aperture of object lens | ????0.45 | ????0.6 | |
| The minimum pit size | ????0.9μM | ????0.4μM | |
| Track space | ????1.6μM | ????0.74μM | |
| Modulation system | ????EFM | ????EFM-plus | |
| Error correcting system | ????CIRC | ????RS-PC |
In table 1, the CD of same disk track has a lot of different with DVD.Yet their compatibility is very important, because of CD has profuse software resource.Major obstacle compatible between DVD and CD is to use independently optical pickup apparatus, and in other words, for playback information on dish, opticator will constitute according to the thickness of dish.Because this reason will be according to the Thickness Design object lens of dish.Thickness as fruit tray departs from designed value, will produce spherical aberration, and the convergence of optical focus is lowered.More particularly, because DVD is that 0.6mm is thick, and that CD is 1.2mm is thick, so two kinds of dishes can not be reset with same pickup unit.In order to make both compatibilities, must use different pickup units respectively.
In order to overcome this problem.For CD and DVD have proposed the double focusing optical unit.In optical pick-up unit shown in Figure 4,, on optical axis direction, separate formation with preset distance to the optical focus of DVD and the optical focus of CD.Solved the problem that causes by the different-thickness dish like this.The principle of double focusing optical pick-up unit shown in Figure 4 is to use the superpose work of two kinds of lens of composite diffraction face (hologram).Numerical aperture according to the object lens of dvd standard optical pickup apparatus is 0.6, and composite diffraction carries out diffraction in the face of the part of its center light.Just as lens reflect it, not assembled by object lens by the light of composite diffraction face diffraction, the numerical aperture of object lens is 0.6, thereby forms the optical focus of DVD.Diffraction light forms the numerical aperture 0.4 of a hologram to adapt to the composite diffraction face, the CD that object lens and 1.2mm are thick.
In optical pickup apparatus shown in Figure 4, the optical focal length of the CD of formation is far away than the dvd pickup focal length that forms.Here dispose fluorescence detector, so that the optical focus reflection image that is focused on the dish is formed thereon.If playback of DVD, the optical focus of DVD is converged on the dish, thereby and the optical focus of CD depart from make the image unclear.The image of the optical focus of DVD is formed on the photodetector, but in the reflected light scattering in large quantities at the optical focus place of CD, and the playback of DVD is not produced ectocine.In the playback of CD, what realized is opposite operation.
If but the pick-up that system has not only playback of DVD but also the CD that can reset are perhaps come playback of DVD and CD with pick-up separately.Should work in the corresponding way according to detected insertion disc-type.The discriminating of DVD and CD can realize with diverse ways: the size of the focus error detection signal of resetting as optical pickup apparatus relatively; Or according to the dimple size size of RF signal relatively.
In addition, method by the type of using the dish that sync pattern detection installs has been proposed.This can detected synchronous code realizes under the concrete mode by analyzing, because CD and DVD use their synchronous code patterns separately.
In order to overcome this shortcoming on the prior art, one of purpose of the present invention provides a kind of apparatus and method, in the system of playback polytype dish, can automatically detect the type of institute's sabot.
Another object of the present invention provides a kind of apparatus and method, for energy playback of DVD and CD, after the initial setting CD mode, detects and analyze the synchronous mode of institute's sabot in system.Thereby detect the type of institute's sabot, and automatically carry out the manner of playback of corresponding dish according to identification result.
Another object of the present invention provides a kind of apparatus and method, for energy playback of DVD and CD, in system, after the initial setting DVD mode, detect and analyze the synchronous mode of institute's sabot, thereby detect the type of institute's sabot, and automatically carry out corresponding dish manner of playback according to identification result.
Further purpose of the present invention provides a kind of apparatus and method, have in the dish playback system of CD and DVD synchronizing indicator, detect and analyze the synchronous mode of institute's mounting disc, thereby detect the type of mounting disc, and automatically carry out the manner of playback of corresponding dish according to identification result.
In order to realize purpose of the present invention, a kind of disc reproducing apparatus is provided, it has CD and the dvd playback system that comprises synchronizing signal separately, CD and dvd playback system have synchronizing indicator respectively, when having detected dish when packing into, the synchronizing signal of systematic analysis synchronizing indicator output is when detecting the CD synchronizing signal, just select to drive the CD playback system, thereby carry out CD playback mode.When detecting the DVD synchronizing signal, just select to drive the dvd playback system, thereby carry out the dvd playback mode.
On the other hand, provide a kind of disc reproducing apparatus, had the CD and the dvd playback system that comprise synchronizing signal separately.The CD playback system has the CD synchronizing indicator, when having detected dish when packing into, whether systematic analysis has the CD synchronizing signal to export from the CD synchronizing indicator, when detecting the CD synchronizing signal, select to drive the CD playback system to carry out CD playback mode, when not detecting the CD synchronizing signal in the given time, select to drive the dvd playback system to carry out the dvd playback mode.
Again on the one hand, provide a kind of disc reproducing apparatus, it has and comprises the CD and the dvd playback system of synchronizing signal separately, and the dvd playback system has the DVD synchronizing indicator.When having detected dish when packing into, whether systematic analysis has the DVD synchronizing signal to export from the DVD synchronizing indicator, when detecting the DVD synchronizing signal, just select to drive the dvd playback system, thereby realize the dvd playback mode, when not detecting the DVD synchronizing signal at the fixed time, select to drive the CD playback system, thereby realize CD playback mode.
Many advantages of more fully estimating and following of the present invention can become clearer with reference to following detailed description when considered in conjunction with the accompanying drawings, are more readily understood.In the drawings, identical reference symbol is represented same or analogous element, wherein:
Fig. 1 is the block scheme of digital video apparatus for replaying disc;
Fig. 2 is a light wavelength in the explanation digital replaying device, the graph of a relation between the numerical aperture of object lens and the optical focus diameter;
Fig. 3 is the relevant video disc of explanation and the pit of CD and the graph of a relation between the optical focus;
Fig. 4 is the schematic diagram of explanation double focusing optical pickup apparatus;
Fig. 5 is the block scheme according to the device of the kind of institute's sabot in the detection disk player of the first embodiment of the present invention;
Fig. 6 has shown the characteristic family that detects the CD frame synchronizing signal according to first embodiment for the kind of detection dish;
Fig. 7 is the block scheme that detects the device of CD frame synchronizing signal according to embodiments of the invention;
Fig. 8 has shown the process flow diagram of explaining the operation of the kind of institute's sabot in the detection disk player;
Fig. 9 is the block scheme that detects the device of the kind of institute's sabot in the disk player according to a second embodiment of the present invention;
Figure 10 shows the figure of a DVD synchronous mode example;
Figure 11 has shown the characteristic family that detects the CD frame synchronizing signal according to second embodiment for the kind of detection dish;
Figure 12 has shown that explanation detects the process flow diagram of the operation of the kind of institute's sabot in the disk player according to second embodiment;
Figure 13 is the block scheme that a third embodiment in accordance with the invention detects the device of the kind of institute's sabot in the disk player;
Figure 14 a and 14b have shown that explanation detects the process flow diagram of the operation of the kind of institute's sabot in the disk player according to second embodiment.
DETAILED DESCRIPTION OF THE PREFERRED
Fig. 5 has shown in first embodiment of the dish recording/playback system with CD and DVD playback system, detects the structural arrangements of the type of institute's sabot automatically.Here suppose that optical pickup apparatus 111 adopts the CD/DVD optical pick-up unit, radio frequency (RF) receiver 512 amplifies the low light level signal of being reset by optical pickup apparatus 111.Here, the RF signal of exporting from RF receiver 512 is the signal from CD or DVD playback.
At first, in the DVD playback system, the DVD frequency band of the RF signal that 516 filtering of DVD balanced device are received, and balanced it.Here, the DVD frequency band becomes a broadband that comprises the CD frequency band.The DVD frequency band that DVD signal processor (digital signal processor) 517 receives from DVD balanced device 516 output streams.Thereby the demodulation modulating data, and proofread and correct the mistake that in said process, produces.DVD signal processor 517 is corresponding to detuner shown in Figure 1/ECC corrector 113.A/V demoder 518 is divided into video data and voice data to the data of DVD signal processor 517 outputs, and they are carried out signal Processing.A/V demoder 518 is corresponding to system decoder 116, Video Decoder 117 and audio decoder 119.
Secondly, in the CD playback system, 513 filtering of CD balanced device from the CD frequency band of the RF signal of RF receiver 512 outputs and balanced it.CD signal processor (digital signal processor) 514 demodulation are from the modulating data of CD balanced device 513 output, and proofread and correct the mistake that produces in the process in the above.515 pairs of data from 514 outputs of CD signal processor of audio signal processor are carried out signal Processing.
The embodiment of this apparatus for replaying disc has CD and DVD playback system.Optical pickup apparatus 111 is the CD that both can reset, but the also unit of playback of DVD.If a dish is loaded in the apparatus for replaying disc, should determine that the dish of being adorned is CD or DVD, then, select to drive corresponding playback system.For this reason, in CD signal processor 514, introduce CD synchronizing indicator 521.Controller 511 is determined the type of institute's sabot according to whether detecting the frame synchronization mode that CD synchronizing indicator 521 is exported, and selects to drive corresponding playback system.
To the CD frame synchronization mode, used pattern does not produce from modulating data.Can guarantee reliable synchronization like this, unless bit-errors occurs.In CD identifying recording layer EFM modulation technique.According to the EFM modulation technique, 8 bit data are changed into 14, with the mode combinations realization of minimum 3 3T and maximum 11 11T.To the CD frame synchronization mode, used or not as data, shown in 6a among Fig. 6 " 1000000000010000000000100
B" (11T+11T+2T).CD synchronous mode shown in Fig. 6 a is recorded among the CD with the 6b of Fig. 6 or the form of 6c.
At recorded data form among the CD shown in the 6d of Fig. 6.The formation of CD synchronizing indicator 521 as shown in Figure 7.With reference to figure 7, data stream is input on the input register 71 and is shifted.The CD frame synchronization mode of reference register 72 storages shown in 6a among Fig. 6.Comparer 73 the parallel carry-out bit data block of the parallel carry-out bit data block of input register 71 and reference register 72 relatively.And with the position unit output consequential signal relatively.The bit data of synchronized signal detector 74 logical combination comparers 73 output, and produce a signal and be detected to determine whether the CD synchronizing signal, here, synchronized signal detector 74 uses a gate circuit.If in synchronous detection, whole being output as " height " logical signal of comparer 73, synchronized signal detector 74 uses the AND door.If the 6d form of CD frame format such as Fig. 6, CD synchronizing indicator 521 synchronous mode shown in the 6e in Fig. 6 detects the CD synchronizing signal in the cycle.Synchronizing signal produced with the cycle of 13.3ms.Signal by CD synchronizing indicator 521 outputs that Fig. 7 constituted is supplied with controller 511.
Coil when being loaded into if detected, controller 511 is set the initial mode of CD modes as it.When even linear velocity (CLV) servo control mechanism of CD mode is ON.The frame synchronizing signal of playback system produced with the 13.3ms cycle.More particularly, when 6d among data and synchronous mode such as Fig. 6 is shown in when being recorded on the CD, frame synchronizing signal is to be detected frame synchronizing signal the cycle to produce from all CD and VC dish with 13.3ms during playback as mentioned above.Here, the CLV servo control mechanism acts on the 11T benchmark place of RF signal.
When controller 511 is set the CD mode as the initialization mode, be under the situation of CD at the dish of being adorned, the CD synchronous mode can normally be detected.Yet if what set is the CD mode, and dress is the DVD dish, and when using the CLV servo control mechanism, frame synchronizing signal can not be detected.In the present embodiment, when dish is loaded into, and initialization mode is the CD mode, CLV is servo be coupled with after, determine whether to detect the playback synchronization signal, so just determined the current CD of being mode or DVD mode, according to determined result, select to drive CD or DVD manner of playback.
Fig. 8 has shown by detected the type of institute's mounting disc by controller 511, has selected to drive the process of corresponding playback mode.As shown in the figure, in the present embodiment when dish setting when being loaded into the CD mode as initial playback mode after, determine whether the CD frame synchronizing signal is detected.If detect synchronizing signal according to the result, that show installation is CD, therefore selects to drive the CD playback system.If do not detect synchronizing signal at the fixed time, what show installation is the DVD dish, therefore selects to drive the DVD playback system.
With reference to figure 8, whether controller 511 is checked has dish to pack into.At first, controller 511 is checked the state of importation 510.Thereby confirm the ON/OFF of pallet.Pallet is when ON/OFF, and controller 511 detects it in step 811 and 813, and then, the affirmation dish is mounted.After, controller 511 is controlled the servo controller (not shown) so that realize the focusing of optical pickup apparatus 111 in step 815.Here, optical pickup apparatus 111 is unit that not only had been applicable to CD but also had been applicable to DVD.Therefore, servo controller drives optical pickup apparatus 111 as the CD pickup unit.Controller 511 improves or lowers the focussing force of optical pickup apparatus 111 and check whether carried out focus-lock in step 817 in step 815.Here, if do not carry out focus-lock, controller 511 detects this state in step 817, and determines that in step 819 dish is not loaded into.This information slip listed price is not packed into, and pallet is by user ON/OFF.
If carried out focus-lock in step 817, this situation indicating panel is installed in the pallet, and at this moment, controller 511 is by step 821-825 control servo controller, so that the dish that rotation is packed into, and open tracking servo and CLV servo control mechanism.Here, servo controller is the drive shaft motor under the control of controller 511, thus rotating disc.In addition, carry out tracking servo so that optical pickup apparatus 111 is accurately followed the tracks of session.If tracking servo is finished, the rotational speed of dish is controlled by the operation axis motor with the CLV pattern of CD playback mode.This situation shows that the CLV mode of CD playback mode is set between the dish installation period, and is ready to detect the CD frame synchronizing signal.
If CD CLV is servo is ON, and controller 511 receives the output of CD synchronizing indicator 514 in step 827, and checks whether detect the CD frame synchronizing signal.Here, CD synchronizing indicator 521 is received in own filtering and balanced data stream in the CD frequency band, and input traffic with the CD frame synchronization mode that stores previously relatively.Here, the CD frame synchronization mode of storage is the distinctive pattern that is different from the form of record data in CD in reference register 72.CD synchronizing indicator 521 synchronous mode with the data stream that receives is relatively exported as the CD frame synchronizing signal so that have the pattern of identical value.
If the dish of installing is CD, produce the synchronizing signal of CD synchronizing indicator 521 outputs with cycle of 13.3ms, shown in Fig. 6 e.Controller 511 detects whether detect the CD frame synchronizing signal in step 827.Synchronizing signal is checked through step 829 and 831, till a predetermined value.The detection setting value of CD frame synchronizing signal should be enough big, so that determine that the dish of being adorned is CD.If detected CD frame synchronizing signal number reaches default numerical value, controller 511 determines that in step 833 optical pickup apparatus 111 is used for CD, and is the CD playback CLV servo control mechanism that resets.Then, in step 835, control DVD signal processor 517 and A/V demoder 518, thus make the dvd playback system inoperative.Thereby control CD signal processor 514 and audio process 515 simultaneously and make the work of CD playback system.By action like this, realized CD playback mode.
Yet if do not detect the CD frame synchronizing signal in step 827, controller 511 checks whether surpass the schedule time in step 837.Even what this means dress is DVD dish, also carry out the detection of CD frame synchronizing signal at the fixed time, controller 511 after CD CLV servo control mechanism is ON, medium at the fixed time CD frame synchronizing signal to be detected.If do not detect synchronizing signal during this period of time, determine that the dish of being adorned is DVD.The schedule time is a time period, can detect several CD frame synchronizing signals in this time period.If do not receive the CD frame synchronizing signal through the schedule time, controller 511 detects this state in step 837, and determines that in step 839 institute's sabot is DVD.Optical pickup apparatus 111 is set and is used for DVD in step 841, and DVD CLV servo control mechanism is ON.If later on CLV is locked, controller 511 detects it in step 843, and CD signal processor 514 and audio signal processor 515 are OFF in step 845, to stop the work of CD playback system.DCD signal processor 517 and A/V demoder 518 are activated and drive the dvd playback system and carry out the dvd playback mode.
Among described first embodiment, in the CD that can reset again can the dish playback system of playback of DVD, when dish is packed into, at first carry out CD playback mode in the above.To check the CD frame synchronizing signal whether dish is arranged.If detect the CD frame synchronizing signal, detecting the dish of being installed is the CD dish, and the CD playback system is activated and carries out CD playback mode.If do not detect, determine that then institute's sabot is DVD, the dvd playback system is activated, to carry out the dvd playback mode.
Fig. 9 has shown the structural arrangements of the type of the automatic detection institute sabot in second embodiment of the dish recording/playback system with CD and DVD playback system.Here suppose optical pickup apparatus 111 CD/DVD optical pick-up unit.Radio frequency (RF) receiver 512 amplifies the low light level signal of being reset by optical pickup apparatus 111.Here, the RF signal of exporting from RF receiver 512 is the signal from CD or DVD playback.
At first, in the CD playback system, 513 filtering of CD balanced device are from the CD frequency band of the RF signal of RF receiver 512 output, and balanced it.CD signal processor 514 demodulation modulation and from the data stream of CD balanced device 513 outputs, and proofread and correct the mistake that in said process, produces, 515 pairs of data from 514 outputs of CD signal processor of audio process are carried out signal Processing.
Secondly, in the DVD playback system, the DVD frequency band of the RF signal that 516 filtering of DVD balanced device are received, and balanced it.At this moment, the DVD frequency band becomes the broadband that comprises the CD frequency band.DVD signal processor 517 receives the DVD frequency band of the data stream of DVD balanced device 516 outputs.Thereby, remove the demodulation modulating data, and proofread and correct the mistake that in said process, produces.DVD signal processor 517 is corresponding to detuner shown in Figure 1/ECC corrector 113.A/V demoder 518 is divided into video data and voice data to the data of DVD signal processor 517 outputs, and they are carried out signal Processing.A/V demoder 518 is corresponding to system decoder 116, Video Decoder 117 and audio decoder 119.
This embodiment of apparatus for replaying disc has CD and DVD playback system.Optical pickup apparatus 111 is unit that the CD that can reset again can playback of DVD.Be loaded in the apparatus for replaying disc as fruit tray, should determine that the dish of being adorned is CD or DVD.Then, should select to drive corresponding playback system.For this reason, DVD synchronizing indicator 522 is added into DVD signal processor 517.Controller 511 is determined the type of institute's sabot according to whether detecting the CD frame synchronization mode that DVD synchronizing indicator 522 is exported, and selects to drive corresponding playback system.
For the DVD frame synchronization mode, using a kind of is not the pattern that produces from modulating data.This has guaranteed reliable synchronization, unless bit-errors occurs.The data that in DVD, write down EFM-Plus modulation technique.The true data pattern is maximum 11T (100000000001 in the dvd playback system that uses the EFM-Plus modulation technique
B).Therefore, normally the DVD synchronous mode uses a kind of pattern of not using in true data.In this case, this pattern should surpass minimum 12T.DVD uses the multiple synchronous mode that combines in a suitable manner.Here, those synchronous modes have the special pattern that does not use in data pattern usually.Suppose that in the present embodiment general mode used in synchronous mode is 14T.Suppose that general mode is on each low 14 of synchronous mode.
Figure 10 shows an example, and the synchronous mode of DVD and data block are stored in the sector format in this embodiment.In Figure 10, reference symbol S represents synchronous mode, and D1-D is a true data.Reference symbol a
1-a
2Represent the length of synchronous mode, b
1-b
2Be data length, reference symbol C
1-C
2The length of expression synchronization frame.Reference symbol E represents the length of 2 synchronization frames.Here, data length b is long more than synchronous mode length a.Reference symbol F represents to form the line number of 2 frame synchronization of sector.Therefore as can be seen, a DVD sector is of a size of F * E[2C ≠ F=2 (a+b) * F].
The sector format that writes down in DVD as shown in figure 10.In this form, 11a among the formation of synchronous mode such as Figure 11.Here, synchronous mode is made of bit string a.The low level of synchronous mode has 14T usually.Low 14 of the multiple synchronous mode that uses in DVD have value.Their high position has different values.Shown in the 11b and 11c of Figure 11, the data transmission period between the DVD frame synchronization mode is 1.2ms.
The DVD synchronizing indicator 522 that is used to detect the DVD frame synchronization mode that is shown in Figure 10 and 11 can be used with the same structure of CD synchronizing indicator shown in Figure 7 521 and realize.In this case, there are low 14 bit data block of common value in the reference register 82 storage DVD frame patterns of DVD synchronizing indicator 522, shown in Figure 11 a.Comparer 73 compares the DVD frame synchronization mode of the piece of input register 71 and line output playback of data stream with reference register 72, and is unit output consequential signal relatively with the position.Synchronized signal detector 74 is the bit data of combination comparator 73 output in logic, and produces a signal and be detected to determine whether the DVD synchronizing signal.
If the formation of DVD sector format as shown in figure 10.DVD synchronizing indicator 522 detects the DVD frame synchronizing signal at the synchronous mode shown in the 11C of Figure 11 in the cycle.The DVD frame synchronization mode was reset with the 1.2ms cycle.DVD synchronizing indicator 521 detects the DVD frame synchronizing signal, and it is exported to controller 511, packs into if detected dish, and controller 511 is set the originate mode of DVD mode as it.When the even linear velocity servo control mechanism of DVD mode is ON, and if the dish of being adorned be DVD, wherein data and synchronous mode are recorded as shown in figure 10, controller 511 receives the DVD frame synchronizing signal with the cycle of 1.2ms.
When controller 511 is set the DVD mode as the initialization mode, be under the situation of DVD at the dish of being adorned, the DVD synchronous mode can normally be detected.Yet if what set is the DVD mode, and dress is the CD dish, and when using the CLV servo control mechanism, frame synchronizing signal can not be detected.In the present embodiment, when dish is loaded into, and initial type of drive is when being the DVD mode, CLV is servo be coupled with after, determine whether to detect the synchronizing signal of playback.So that determine that current is CD mode or DVD mode.According to determined result, select to drive CD or DVD manner of playback.
Figure 12 has shown according to the 2nd embodiment, selects to drive the process of corresponding playback mode by the type of controller 511 detection institutes sabot.As shown in the drawing, in the present embodiment when dish is loaded into, the DVD mode is set at initial playback mode after, determine whether to detect the DVD frame synchronizing signal.If detect synchronizing signal according to the result, that show installation is DVD, therefore selects to drive the DVD playback system.If do not detect synchronizing signal at the fixed time, what show installation is the CD dish, therefore selects to drive the CD playback system.
With reference to Figure 12, whether controller 511 is checked has dish to be loaded into.At first, controller 511 checks that the state confirmation pallet of importations 510 is ON/OFF, if when pallet is ON/OFF, controller 511 detects it in step 1211 and 1213, defines dish then and is loaded into.Then, controller 511 is controlled the servo controller (not shown) so that realize the focusing of optical pickup apparatus 111 in step 1215.Here optical pickup apparatus 111 is unit that not only had been applicable to CD but also had been applicable to DVD.Therefore, servo controller drives optical pickup apparatus 111 as the CD pickup unit.Controller 511 improves or reduces the focusing of optical pickup apparatus 111 in step 1215.And in step 1217, check whether carry out focus-lock.Here if do not carry out focus-lock.Controller 511 detects this state in step 1217, and determines that in step 1219 dish do not pack into, and this situation shows that pallet is not coiled by user ON/OFF and packs into.
If in step 1217, carried out focus-lock, this situation indicating panel has been contained in the pallet, detecting device 511 is controlled servo controller in step 1221-1225 in this case, so that the dish that rotation is packed into, and connection tracking servo and CLV servo control mechanism, here, servo controller is the drive shaft motor under the control of controller 511, thus rotating disc.In addition, carry out tracking servo so that optical pickup apparatus 111 is accurately followed the tracks of session.If tracking servo is finished, the rotational speed of dish is handled Spindle Motor by the CLV mode in the dvd playback mode, and Be Controlled.This situation shows that the CLV mode of dvd playback mode is set between the dish installation period, and is ready to detect the frame synchronizing signal of DVD.
If DVD CLV is servo is ON, and controller 511 receives the output of DVD synchronizing indicator 522 in step 1227, and checks whether the DVD frame synchronizing signal is detected.Here, DVD synchronizing indicator 522 is received in filtering and balanced data stream in the DVD frequency band, and input traffic with the DVD frame synchronization mode that stored in the past relatively.Here, the DVD frame synchronization mode has the reference data that is stored in the reference register 72 usually, and is one and has the special pattern (14T) that is different from the data layout that writes down among the DVD.DVD synchronizing indicator 522 compares synchronous mode with the data stream that receives, the result has the pattern of identical value and exports as the DVD frame synchronizing signal.
If the dish of installing is DVD, from the synchronizing signal of DVD synchronizing indicator 522 outputs.In the cycle of 1.2ms, produce, shown in Figure 11 C.Whether controller 511 detects the DVD frame synchronizing signal in step 1227 and is detected.Detect synchronizing signal up to a predetermined value through step 1229 and 1231.The detection numerical value of DVD frame synchronizing signal should be set enough big so that determine that the dish of being adorned is DVD.If it is identical with predetermined number to detect the DVD frame synchronizing signal, controller 511 determines that in step 1233 optical pickup apparatus 111 is used for DVD and the CLV servo control mechanism that resets is used for dvd playback.Then, in step 1235, thereby control DVD signal processor 517 and A/V demoder 518 make the dvd playback system works, thereby control CD signal processor 514 simultaneously and audio process 515 is not worked the CD playback system.So just realized the dvd playback mode.
Yet if do not detect the DVD frame synchronizing signal in step 1227, controller 511 checks whether surpass the schedule time in step 1237.Even what this means dress is the CD dish, the also middle at the fixed time detection of carrying out the DVD frame synchronizing signal.Controller 511 after DVD CLV servo control mechanism is ON, medium at the fixed time DVD frame synchronizing signal to be detected.If at this moment do not detect synchronizing signal, determine that institute's sabot is CD.The schedule time is a time period, can detect several DVD frame synchronizing signals in this time period.If the process schedule time does not receive the DVD frame synchronizing signal.Controller 511 determines that in step 1239 institute's sabot is the CD dish.Set at step 1241 optical pickup apparatus 111 and to be used for CD, and CD CLV servo be ON.If CLV is locked thereafter, controller 511 detects it in step 1243, and in step 1245 CD signal processor 514 and audio process 515 for ON so that make the work of CD playback system.Make DVD signal processor 517 and A/V demoder 518 can not drive the dvd playback system disk and carry out CD playback mode.
In the second above-mentioned embodiment, but but, when in the dish playback system, packing dish into, at first carry out the dvd playback mode for not only playback CD but also playback DVD.Thereby check the DVD frame synchronizing signal whether dish is arranged.If detect the DVD frame synchronizing signal, detecting the dish of being adorned is DVD.Make the dvd playback system works to carry out the dvd playback mode.If do not detect the DVD frame synchronizing signal, determine that then the dish of being adorned is CD, make the work of CD playback system, to carry out CD playback mode.
Figure 13 is presented in the 3rd embodiment of the dish recording/playback system with CD and DVD playback system, detects the structural arrangements of the type of institute's sabot automatically.Here, suppose that optical pickup apparatus 111 uses the CD/DVD optical pick-up unit.Radio frequency (RF) receiver 512 amplifies the low light level signal of being reset by optical pickup apparatus 111.Here, the RF signal of exporting from RF receiver 512 is the signal from CD or DVD playback.
At first, in the CD playback system, 513 filtering of CD balanced device are from the CD frequency band of the RF signal of RF receiver 512 output, and balanced it.CD signal processor 514 demodulation modulation and from the data stream of CD balanced device 513 outputs.And proofread and correct the mistake that in said process, produces.515 pairs of data from 514 outputs of CD signal processor of audio process are carried out signal Processing.
Secondly, in the DVD playback system, the DVD frequency band of the RF signal that 516 filtering of DVD balanced device are received, and balanced it.At this moment, the DVD frequency band becomes the broadband that comprises the CD frequency band.DVD signal processor 517 receives the DVD frequency band of the data stream of DVD balanced device 516 outputs.Thereby, remove the demodulation modulating data, and proofread and correct the mistake that in said process, produces.DVD signal processor 517 is corresponding to detuner shown in Figure 1/ECC corrector 113.A/V demoder 518 is divided into video data and voice data to the data of DVD signal processor 517 outputs, and they are carried out signal Processing.A/V demoder 518 is corresponding to system decoder 116, Video Decoder 117 and audio decoder 119.
This embodiment of apparatus for replaying disc has CD and DVD playback system.Optical pickup apparatus 111 is the CD that both can reset, but the unit of playback of DVD again.If a dish is loaded in the apparatus for replaying disc, should determine that the dish of being adorned is CD or DVD.Then, should select to drive corresponding playback system, for this reason, in CD signal processor 514, insert CD synchronizing indicator 521, in DVD signal processor 517, insert DVD synchronizing indicator 522.Controller 511 is determined the type of institute's sabot, and is selected to drive corresponding playback system according to whether detecting CD or DVD synchronizing indicator 521 or 522 CD or the DVD frame synchronization modes of exporting.
As above explanation, CD has different frame synchronization modes with DVD.Because this reason, the dish playback system with CD and dvd playback system can detect the type of placing by the frame synchronization mode of inspection record on dish.Here, the characteristic of CD frame synchronization mode identical with among first embodiment of Fig. 6.The characteristic of DVD frame synchronization mode identical with among Figure 10 and 11 second embodiment.
Detect the CD synchronizing indicator 521 of CD frame synchronization mode and the DVD synchronizing indicator 522 of detection DVD frame synchronization mode, can constitute as Fig. 7 according to first and second embodiment.Here, the CD frame synchronization mode of reference register 72 storages shown in the 6a of Fig. 6 of CD synchronizing indicator 521.The DVD frame synchronization mode of reference register storage shown in the 11a of Figure 11 of CD synchronizing indicator 522.
If the dish of being adorned is by initial detecting, the initial driving mode that controller 511 is provided with it is CD or DVD mode.Here, be the CD mode if controller 511 is set the initial driving mode, be under the situation of CD in institute's sabot, can normally detect the CD frame synchronization mode.Yet, when institute's sabot is DVD, and set be the CD pattern time, can not detect frame synchronizing signal when applying CLV when servo.In this case, controller 511 changes into the DVD mode to the initialization mode, so that can detect the DVD frame synchronizing signal by DVD synchronizing indicator 522.
On the contrary, be the DVD mode if controller 511 is set the initial driving mode.In institute's sabot is under the situation of DVD, can normally detect the DVD frame synchronization mode.Yet, when institute's sabot be CD set be the DVD pattern time, apply CLV and can not detect frame synchronizing signal when servo.In this case, controller 511 converts the initialization mode to the CD mode, so that can detect the CD frame synchronizing signal by CD synchronizing indicator 521.
In the 3rd embodiment of the present invention, when dish was packed into, setting the initialization mode was the CD mode, then, checked whether detect the CD frame synchronization mode.If detect, continue to carry out CD playback mode, if do not detect, then,, continue to carry out the dvd playback mode then to detect the DVD frame synchronization mode changing into the DVD mode when previous mode.
Figure 14 a and 14b have shown that a third embodiment in accordance with the invention drives the process flow diagram of the process of corresponding playback mode by the type selecting of controller 511 detection dishes when dish is loaded into.
With reference to Figure 13, controller 511 detects the CD frame synchronizing signal through step 1411-1435 among Figure 14 a in the process of first embodiment.When the CD frame synchronizing signal is detected, select to drive the CD playback system to realize CD playback mode.At first, be loaded into if detected dish, CD playback mode is set to the initial driving mode and analyzes the output of CD synchronizing indicator 521.If detect the CD frame synchronizing signal, so just determine that institute's sabot is CD, carry out CD playback mode.
Setting under the state of CD playback mode as the initial driving mode, if do not receive the CD frame synchronizing signal in the given time, controller 511 detects it in the step 1437 of Figure 14 a, then in the step 1439 of Figure 14 b, changing into the DVD mode when previous mode,, detect the DVD frame synchronizing signal through step 1449-1467 so that control optical pickup apparatus 111 comes the information of playback of recorded on DVD, carry out the dvd playback mode, as second embodiment.
In the third embodiment of the present invention, when in the dish playback system of energy while playback CD and DVD, putting into dish, at first carry out CD playback mode, check the CD frame synchronizing signal that whether detects placing.If do not detect the CD frame synchronizing signal, then detect the DVD frame synchronizing signal.
Another kind of situation of the present invention is at first carried out the dvd playback mode, checks the DVD frame synchronizing signal that whether detects placing.If do not detect the DVD frame synchronizing signal, then can detect the CD frame synchronizing signal.In this case,, determine that then institute's sabot is DVD, make the dvd playback system works, carry out the dvd playback mode if detect the DVD frame synchronizing signal.Here, if do not detect the DVD frame synchronizing signal in the given time, the DVD type of drive changes into the CD mode, detects the CD frame synchronizing signal then.Like this, determine that institute's sabot is CD, make the work of CD playback system, carry out CD playback mode.
Among the of the present invention the first, the second and the 3rd embodiment, illustrated one can playback CD again can playback DVD single pick-up.Yet, of the present invention can similarly being respectively applied in the dish playback system that single CD pick-up and single DVD pick-up are only arranged.In this structure, when packing dish into, at first analyze the data stream that produces from single CD pick-up, thereby check whether detect the CD frame synchronizing signal.Here, if detect the CD frame synchronizing signal, carry out CD playback mode.If do not detect this signal in the given time.Make the work of single DVD pick-up, select the dvd playback system and carry out the dvd playback mode.
As mentioned above, the present invention can detect the type of packing into and can reset the dish in the device of multiple dish automatically, especially detects the synchronizing signal of institute's sabot, the type of decision dish, and this is the type of detection dish accurately.Automatically perform corresponding dish playback mode according to testing result.
Therefore, should be realized that the present invention is not limited to specific embodiment disclosed herein as implementing best way of the present invention, should, except defined in the appending claims, the invention is not restricted in the specific embodiment described in this instructions.
Claims (10)
1, disc reproducing apparatus, it has CD and the dvd playback system that comprises synchronizing signal separately, and the CD playback system contains synchronizing indicator; System analyzes the CD synchronizing signal that whether detects the output of CD synchronizing indicator having detected dish when packing into; When detecting the CD synchronizing signal, select to drive the CD playback system and carry out CD playback mode, if do not detect the CD synchronizing signal in the given time, select to drive the dvd playback system, carry out the dvd playback mode.
2, disc reproducing apparatus, it has and is used to use the CD of different synchronizing signals and the optical pickup apparatus of DVD, also has CD and dvd playback system; The CD playback system contains the CD synchronizing indicator, is detecting dish when packing into, and optical pickup apparatus is controlled so as to and is used for single CD, whether systematic analysis detects the CD synchronizing signal of CD synchronizing indicator output, when detecting the CD synchronizing signal, select to drive the CD playback system, carry out CD playback mode.When not detecting the CD synchronizing signal in the given time, optical pickup apparatus is controlled so as to and is used for single DVD, and selects to drive the dvd playback system, carries out the dvd playback mode.
3, a kind of playback method of disc reproducing apparatus, this device have and are used to use the CD of different synchronizing signals and the optical pickup apparatus of DVD, also have CD and dvd playback system, and the CD playback system contains the CD synchronizing indicator; Detecting dish when packing into, optical pickup apparatus is controlled so as to and is used for single CD, and whether systematic analysis detects the CD synchronizing signal of CD synchronizing indicator output, when detecting the CD synchronizing signal, selects to drive the CD playback system, carries out CD playback mode; When not detecting the CD synchronizing signal in the given time, optical pickup apparatus is controlled so as to and is used for single DVD, and selects to drive the dvd playback system, carries out the dvd playback mode.
4, disc reproducing apparatus, it has CD and the dvd playback system that comprises synchronizing signal separately, and the dvd playback system contains the DVD synchronizing indicator; System is detecting dish when packing into, analyze the DVD synchronizing signal that whether detects the output of DVD synchronizing indicator, when detecting the DVD synchronizing signal, select to drive the dvd playback system, carry out CVD playback mode,, do not detect the DVD synchronizing signal if in the given time, select to drive the CD playback system, carry out CD playback mode.
5, disc reproducing apparatus, it has and is used to use the CD of different synchronizing signals and the double focusing optical pickup apparatus of DVD, also have CD and dvd playback system, the dvd playback system contains the DVD synchronizing indicator, is detecting dish when packing into, and optical pickup apparatus is controlled so as to and is used for single DVD, whether systematic analysis detects the DVD synchronizing signal of DVD synchronizing indicator output, when detecting the DVD synchronizing signal, select to drive the dvd playback system, carry out the dvd playback mode.When not detecting the DVD synchronizing signal in the given time, optical pickup apparatus is controlled so as to and is used for single CD, selects to drive the CD playback system, carries out CD playback mode.
6, a kind of playback method of disc reproducing apparatus, this device has CD and the DVD double focusing optical pickup apparatus that is used to use different synchronizing signals, also have CD and dvd playback system, the dvd playback system contains the DVD synchronizing indicator, is detecting dish when packing into, and optical pickup apparatus is controlled so as to and is used for single DVD, whether systematic analysis detects the DVD synchronizing signal of DVD synchronizing indicator output, when detecting the DVD synchronizing signal, select to drive the dvd playback system, carry out the dvd playback mode; When not detecting the DVD synchronizing signal in the given time, optical pickup apparatus is controlled so as to and is used for single CD, and selects to drive the CD playback system, carries out CD playback mode.
7, disc reproducing apparatus, it has CD and the dvd playback system that comprises synchronizing signal separately respectively, and CD and dvd playback system contain synchronizing indicator respectively; When having detected dish when packing into, the synchronizing signal of systematic analysis synchronizing indicator output; When detecting the CD synchronizing signal, select to drive the CD playback system, carry out CD playback mode, when detecting the DVD synchronizing signal, select to drive the dvd playback system, carry out the dvd playback mode.
8, disc reproducing apparatus, it has and is used to use the CD of different synchronizing signals and the double focusing optical pickup apparatus of DVD, also have CD and dvd playback system, these systems contain the synchronizing indicator that has separately respectively, when having detected dish when packing into, optical pickup apparatus is controlled so as to and is used for single CD, and whether systematic analysis detects the CD synchronizing signal of CD synchronizing indicator output.When detecting the CD synchronizing signal, select to drive the CD playback system, carry out CD playback mode, when not detecting the CD synchronizing signal in the given time, optical pickup apparatus is controlled so as to and is used for single DVD, selects to drive the dvd playback system, carries out DVD and returns mode.
9, a disc reproducing apparatus, it has and is used to use the CD of different synchronizing signals and the double focusing optical pickup apparatus of DVD, also have CD and dvd playback system, system has synchronizing indicator separately respectively, when having detected dish when packing into, optical pickup apparatus is controlled so as to and is used for single DVD, whether systematic analysis detects the DVD synchronizing signal of DVD synchronizing indicator output, when detecting the DVD synchronizing signal, select to drive the dvd playback system, carry out the dvd playback mode, when detecting the CD synchronizing signal, optical pickup apparatus is controlled so as to and is used for single CD, and selects to drive the CD playback system, carries out CD playback mode.
10, disc reproducing apparatus, it has and is used to use the CD of different synchronizing signals and the double focusing optical pickup apparatus of DVD, also have CD and dvd playback system, CD and dvd playback system have synchronizing indicator separately respectively, system is detecting dish when packing into, analyze the synchronizing signal of synchronizing indicator output, when detecting the CD synchronizing signal, select to drive the CD playback system, carry out CD playback mode, when detecting the DVD synchronizing signal, select to drive the dvd playback system, carry out the dvd playback mode.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR44030/1996 | 1996-10-04 | ||
| KR44031/96 | 1996-10-04 | ||
| KR1019960044030A KR100194047B1 (en) | 1996-10-04 | 1996-10-04 | Disc determination device and method |
| KR44030/96 | 1996-10-04 | ||
| KR1019960044032A KR100194049B1 (en) | 1996-10-04 | 1996-10-04 | Disc determination device and method |
| KR44032/96 | 1996-10-04 | ||
| KR44032/1996 | 1996-10-04 | ||
| KR1019960044031A KR100194048B1 (en) | 1996-10-04 | 1996-10-04 | Disc determination device and method |
| KR44031/1996 | 1996-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1178971A true CN1178971A (en) | 1998-04-15 |
| CN1103098C CN1103098C (en) | 2003-03-12 |
Family
ID=27349400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97101075A Expired - Lifetime CN1103098C (en) | 1996-10-04 | 1997-01-31 | Disc detector and method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1103098C (en) |
| DE (1) | DE69727525T2 (en) |
| RU (1) | RU2119686C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520924C (en) * | 2005-06-30 | 2009-07-29 | 松下电器产业株式会社 | Optical disk unit and driving method therefor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2066936A1 (en) * | 1991-05-16 | 1992-11-17 | Donald Spector | Compact disc package |
| CN1031018C (en) * | 1994-01-20 | 1996-02-14 | 周轩进 | Method and apparatus for stereoscopic image for TV programs |
-
1997
- 1997-01-30 RU RU97101428A patent/RU2119686C1/en active
- 1997-01-31 CN CN97101075A patent/CN1103098C/en not_active Expired - Lifetime
- 1997-03-19 DE DE69727525T patent/DE69727525T2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520924C (en) * | 2005-06-30 | 2009-07-29 | 松下电器产业株式会社 | Optical disk unit and driving method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1103098C (en) | 2003-03-12 |
| DE69727525T2 (en) | 2005-01-05 |
| RU2119686C1 (en) | 1998-09-27 |
| MX9700671A (en) | 1998-06-30 |
| DE69727525D1 (en) | 2004-03-18 |
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