CN1096062C - CD play back system with synchronization and anti-vibration functions - Google Patents

Abstract

The present invention relates to a CD playing system with anti-vibration function, which comprises a data signal processor and a memory and time control device. When a servo device discovers that an optical pickup loses a focusing state and/or a jumping-tracking state, a control device can obtain a writing data frame which belongs to the frame in playing data from the memory and time control device. The control device commands that the memory and time control device discards the data frame not yet written out and commands that the servo device carries out focusing operation and/or tracking operation of the optical pickup again, so the optical pickup can return to the previous frame of the data frame which is writing before the focusing state and/or the jumping-tracking state is lost. In addition, data are linked again after the optical pickup returns to the normal tracking and focusing states.

Description

Has the CD Play System that reaches anti-vibration functions synchronously

Present invention is directed to a kind of CD Play System with anti-vibration functions, and particularly relevant for a kind of CD Play System with vibrationproof ability, can when interrupting for some reason, played data fully synchronously be connected, in order to avoid the situation of interruption takes place the CD playing programs with former data stream.

CD (Compact Disc), and, become multimedia programmings such as comprising dynamic music and animated image, and the standard recording medium used of static mass data storing based on the various standards that original CD was derived.As data storage medium, the CD dish is in the file access such as the computer document data (file access) of static state, and on dynamic playing programs (programplayback) such as music or movie program, the demand of its operating characteristic is different.

The typical case, when the recording medium used as the computer data file, CD player is by reading out apace on the dish with data to the desired emphasis that reads of CD dish.In comparison, when using the recording medium of conduct such as music program, the CD player then is feeding out of continuous and unbroken program data bit stream to the reading requirement emphasis of CD dish.

On the other hand, because pollute or the dvd playback body such as is vibrated at the influence of factor such as the CD optical disc surface, reading of data of optical disk may suffer from its problem that loses focusing (focusing) and follow rail (tracking) escape of data read head (pickup head).With regard to the computer document data read situation of static state, the interruption of data stream also is unlikely the too big problem that causes, because in a single day reply correct focusing and follow rail in system, data stream promptly can correctly couple together in original part of interrupting.This kind because vibration etc. situation caused loses focusing and follow the rail escape, with and the phenomenon that postpones of flow interruption, for the purpose did not influence of data read, only the time of data access can be elongated basically.

But, among the situation of music or video display CD, this kind because dvd playback body vibration etc. factor caused loses focusing and follow rail escape phenomenon, diverse consequence is then arranged.This be because, if losing focusing or following the interruption that the rail escape has caused the music program data bit stream because of the data read head, then just be that system can settle out and reply later correct focusing and follow rail in oscillation phenomenon, also can cause the musical sound of music program to play the phenomenon of interrupting often.The situation of this kind interruption program on conscientious music program is appreciated, is a kind of unpleasant puzzlement really.This kind situation occurs among the mobile CD system (mobile CD systems) that is installed in such as automobile etc. especially easily.Among this type of moves application purpose,, be irritating especially so plant the situation of music interruption because vibration is inevitable phenomenon.

Among the prior art, lose focusing and follow the flow interruption phenomenon that the rail escape is caused, the CD Play System of use memory buffer unit (memory buffer) is arranged, with the situation of seeking to avoid music data stream to interrupt at the data read head.This type systematic ties up to the instant front of playing of music data, tries to be the first and reads the data of one section certain length, and with memory buffer it storage is got off.As losing the situation generation of focusing or following the rail escape, system is in foundation present situation data and when seeking to reply correct focusing and following rail, promptly can utilize leading and in advance the music data of buffer storage in memory buffer proceed the broadcast of music program, to avoid the interruption of program.

For example, the tandem circuit block scheme that shows a kind of typical C D Play System among Fig. 1, show that wherein this system includes a rotation motor (spindle motor) 20, can drive CD 10 with the rotation of the speed of appointment, and by optical read head (laser pickup head) 30 with data by reading out on the CD 10.The data-signal that optical read head picked up, after radio frequency amplifier (RF amplifier) 40 its signal intensities of amplification, deliver to servomechanism (servo circuitry) 50 so that utilize a kind of mode of back coupling according to this on the one hand, adjust the rotating speed of control rotation motor 20, and the focusing of optical read head 30 and follow rail and the mechanicalness action such as control.

On the other hand, by the RF signal after radio frequency amplifier 40 amplifications, also carry out necessary processing via data processor (dataprocessor) 60, this a little processing includes such as eight to 14 modulation codes (eight-to-fourteen modulation encoding, EFM) demodulation, obtaining of subcode (subcode), and the detection of mistake and corrigendum (error correction and detection, EDC) etc.After these a little data necessary processing, could go out music signal by access among the signal that reads out, digital pattern absolute music data last and that will obtain are again delivered to digital to analog converter (D/A) 80, be converted into after the analog music signals, just can promote loudspeaker 100 and sound by amplifier 90.Among the system of Fig. 1,70 of microcontrollers are responsible for monitoring the also state of control system, and can receive extraneous instruction, so that carry out such as jumping into selected songs etc., the selectivity control action when the music data access is play.

Among the system of Fig. 1, optical read head 30 is the part that belongs to mechanical realization, is highly susceptible to being subjected to the influence of extraneous mechanicalness action.Such as the vibration on system chassis etc., all may make read head 30 lose correct focusing, or the escape correct path, cause by the interruption of data processor 60 to music data signal stream the digital to analog converter 80.The situation that this kind phenomenon can cause the intermittence of music to be interrupted, among such as car dress CD Play System, this kind situation is more common.

Cause the generation of playing the interruption situation for fear of this kind vibration, shown system architecture among Fig. 2 that the people has had suggestion.Fig. 2 shows that prior art avoids playing the circuit block diagram of a kind of CD Play System of interruption.Basic system among this kind framework and Fig. 1, the difference that it is main on hardware structure ties up in its many storeies 110 such as random access memory (RAM).

Among the framework of Fig. 2, data processor 60 was after handling the data that radio frequency amplifier 40 exported, and the result that can will handle earlier is stored among the storer 110.Treat digital to analog converter 80, owing to for example vibration situation that loses correct focusing or correctly follow rail that causes causes the interruption of data-signal, thereby presented when required for continuing of data, again by reading in data among the storer 110, and deliver to digital to analog converter 80, so that keep the continuous of data, make it unlikely interruption.Microcontroller 70 utilizes control servomechanism 50 to adjust the rotating speed of rotation motor 20, so that accelerate or slow down by the speed of taking out data on the CD, so that stored data volumes maintain fully loadedly as far as possible in the storer 110, but be unlikely the degree of overflowing (overflow).

Among the system of Fig. 2, if even the CD player causes the phenomenon of jumping onto the tracks owing to the factor of mechanical vibration etc. causes optical read head to lose correct focusing, at this moment, before as long as the data of microcontroller 70 in storer 110 use, can control the data stream that servomechanism 50 continues to interrupt because of vibration earlier, just can not cause because digital to analog converter 80 has not had data the situation of interrupting with the broadcast that causes music.

But,, how after mechanical vibration take place, can make music be connected the also stage of mistake not of a bit group, just constitute an important problem because dish is gone up the cause of deposit data mode among the CD standard (IEC 908).D.G.King is entitled as the United States Patent (USP) the 5th of " CD player with intermediate store memory storage " (" Compact disk player having an intermediate memory storage device "), 379, No. 284 cases, wherein disclosed and a kind ofly can make read head lose focusing because of vibration or when following rail, utilized the pre-deposit data in the register and make the CD player of the unlikely interruption of broadcast of music.On the other hand, people such as A.Wong are entitled as the United States Patent (USP) the 5th of " compensator of jumping onto the tracks of optical disc reproducing apparatus " (" Trackingjump compensator for optical disc reproducing apparatus "), 148, in No. 417 cases, also disclosed the compensator that a kind of optical disc machine pick-up head is jumped onto the tracks, utilize similar arrangement and, still can keep not interrupting of music because under such as the situation of vibrating the caused Jiao of mistake and the flow interruption that causes of jumping onto the tracks.But, all do not consider fully synchronously in this two United States Patent (USP)s case, the also not poor perfection of bit group is connected.

The United States Patent (USP) the 5th that is entitled as " with apparatus for replaying disc and the method for N times of normal speed " " Disk reproducing apparatus and method forreproducing an audio signal and subcode at N times normal speed from a disk " people such as I.Kimura from coiling playback audio signal and subcode, 615, in No. 194 cases, the device that it disclosed wishes to reach its so-called corresponding one to one be connected (one-to-one correspondence), it is used to make its music to reach the method for synchronous linking, mainly be subcode (subcode) and data itself with music data, all deposit among the temporary memory buffer, also monitoring the subcode in the EFM data simultaneously, so that can be connected immediately where necessary always.Because temporary memory buffer also will store subcode, caused the waste that stores storage space, and on the other hand, its hardware structure of implementing this kind method is also comparatively complicated so on the one hand.

The mode of music data store data on the CD dish is as shown in Figure 3A.After each synchrodata (SYNC) 200, followed by subcode (SUBCODE) 210 later be only music data.Subcode 210 is by P, Q, R ... to W totally eight passages (channel) formed, 98 subcodes just form a complete Frame (data frame).

As shown in Fig. 3 B, subcode in this Frame system with special data S0 and S1 as beginning.Among the subcode in the Frame, its Q channel content system wherein has this sub-code data to belong to the data of the time (Min:Sec:Frame) and the time (A_MIN:A_SEC:A_FRAME) in whole dish of this rail shown in Fig. 3 C.According to these a little data, can make music lose focusing or after escape follows rail, can reach the data-linkage that does not differ from a bit group in vibration.

But, among the system of this type of buffer-stored, its synchronous framework of the music that is used in, be not can't reach the neither deviation of each tuple fully synchronously, be exactly the system architecture too complex, so that cost is too high.Adopt memory buffer to seek to avoid playing among the CD Play System of interruption in prior art, the linking of its data stream is not fully synchronous.In other words, the data-linkage of some system in fact is the linking error by several bit groups.This kind is engaged in the broadcast of music and has been still its shortcoming, forms the different sound that people's ear can be heard sometimes.

Therefore, one object of the present invention ties up in a kind of CD Play System with vibrationproof ability is provided, and can fully synchronously be connected with former data stream when played data is interrupted for some reason, to avoid the CD playing programs situation of interrupting takes place.

For reaching aforementioned purpose, the invention provides a kind of CD Play System that reaches anti-vibration functions synchronously that has, it includes a control device, the action of control whole C D Play System; One servomechanism installation is connected to control device and is controlled and control the rail that follows of the rotating speed of CD CD rotation motor of CD Play System and optical read head; One storer can store data in the CD CD; With a data-signal treating apparatus, be connected with described storer with described control device, this data-signal treating apparatus comprises: a radio-frequency (RF) signal input end, can accept optical read head by the radiofrequency signal that reads on the CD CD and amplified by a radio frequency amplifier, to carry out signal Processing; One played data output terminal can export the digital play signal of result to the public address system of CD Play System, plays sound so that send this; One storage and time-controlling arrangement, be controlled by described control device, when servomechanism installation finds that forfeiture focusing of generation optical read head and escape follow the rail state, promptly notify control device, it is to be that frame the played data that control device is promptly obtained the Frame that is writing at present from storage and time-controlling arrangement; The data-signal treating apparatus more comprises: an EFM detuner, and accept the RF data signal that described radio frequency amplifier sends and carry out demodulation; One intersects Li Zi-Solomon code demoder, accepts the control signal of described control device, and links to each other with time controller with described storage and to decode; One address generator is controlled by described storage and time controller, and described storer is delivered in the address that is produced; One output buffer is accepted the decoding output of described intersection Li Zi-Solomon code demoder and from the data of described storer, is exported continuously; An and tandem output; Wherein, follow the rail state with escape, or when running into the situation of storer spill-over, control device just interrupts the action of EFM detuner, and the intersection Li Zi-Solomon code demoder of resetting when optical read head forfeiture focusing takes place; It is to be to belong to n Frame that control device is obtained the data that are about in the write store by storage and time controller, and the order servomechanism is sought the position of n-1 Frame, and make the EFM detuner when the predetermined subcode of the next one of waiting until played data occurs, promptly begin to transmit data and give intersection Li Zi-Solomon code demoder, thereby play signal ideally is connected; Control device one side demanded storage and time controller abandon the Frame of not writing this storer as yet fully, then order servomechanism installation to carry out the focusing of optical read head again on the other hand and follow rail action, so that optical read head is returned to the forfeiture focusing and escape follows on the previous frame of this Frame that is writing before the rail, and after the read head answer normally follows rail and focuses, played data is connected up.

For reaching aforementioned purpose, the present invention also provides to have synchronously and the synchronous method that is connected of a kind of played data of the CD Play System of anti-vibration functions, and wherein this CD Play System includes a control device of the action of control whole C D Play System; Be connected to control device and controlled and control the rotating speed of CD CD rotation motor of CD Play System and a servomechanism installation that follows rail of optical read head; Can store a storer of data in the CD CD; With a data-signal treating apparatus, include a storage and a time-controlling arrangement, it also has a radio-frequency (RF) signal input end, can accept optical read head by the radiofrequency signal that reads on the CD CD and amplified by a radio frequency amplifier, to carry out signal Processing, and have a played data output terminal, and the digital play signal of result can be exported to the public address system of CD Play System, play sound so that send this; Wherein, the step of this method comprises: when servomechanism installation finds that forfeiture focusing of generation optical read head and escape follow the rail state, promptly notify control device; It is to be that frame in the played data that control device is promptly obtained the Frame that is writing at present by storage and time-controlling arrangement; Control device demanded storage and time controller abandon the Frame of not write as yet; Control device order servomechanism installation carries out the focusing of optical read head again and follows the rail action, so that optical read head is returned to the forfeiture focusing and escape follows on the previous frame of this Frame that is writing before the rail; After the read head answer normally follows rail and focuses, played data is connected up; Follow the rail state when optical read head forfeiture focusing takes place with escape, or when running into the situation of storer spill-over, control device just interrupts the action of EFM detuner, and the intersection Li Zi-Solomon code demoder of resetting; With control device and the data that obtain in the write store just by storage and time controller be to be to belong to n Frame, and the order servomechanism is sought the orbital position of n-1 Frame, and make the EFM detuner when the predetermined subcode of the next one of waiting until played data occurs, promptly begin to transmit data and give intersection Li Zi-Solomon code demoder, thereby play signal ideally is connected.

For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, hereinafter utilize preferred embodiment and conjunction with figs. to elaborate.

Brief Description Of Drawings:

Fig. 1 shows a kind of tandem circuit block scheme of typical C D Play System;

Fig. 2 shows that prior art avoids playing the circuit block diagram of a kind of CD Play System of interruption;

Fig. 3 A shows the location mode of music data at the CD dish;

Fig. 3 B is presented at the data channel structure of each subcode among the Frame;

Fig. 3 C shows the content of the Q passage among the subcode;

Fig. 4 shows the synchronous linking according to a preferred embodiment of the present invention, but the circuit block diagram of the CD Play System of vibration resistance; With

But the synchronous circuit that is connected CD Play System embodiment in Fig. 5 displayed map 4 according to the present invention's vibration resistance, the sequential relationship during its System Operation between each coherent signal.

The detailed description of preferred embodiment

Fig. 4 shows according to a preferred embodiment of the present invention, but the circuit block diagram of the synchronous linking CD Play System of vibration resistance.At the shown framework of the present invention of Fig. 4, it is by a servomechanism 600, one microcontrollers (microcontroller) 400, one storeies 500 basically, and a data-signal treatment circuit of the square frame representative that is indicated with reference number 300.Certainly, microcontroller 400 also can be substituted by microprocessor (microprocessor), and end depends on the needs.

Certainly, this kind circuit framework also must be connected on the signal input line road 310 of data-signal treatment circuit 300, the radio frequency amplifier of its front end, so that amplify the data of optical read head institute's access on by the CD that rotation motor drove, and be connected on the output line road 440 of data-signal treatment circuit 300, the digital to analog converter of its rear end and the amplifier and the loudspeaker that are linked thereafter just can play out music.Though do not show the rotation motor of front end in the embodiment circuit block diagram of Fig. 4, optical read head, radio frequency amplifier, and the digital to analog converter of rear end, amplifier and loudspeaker, but, can understanding person as haveing the knack of in the scholar of this skill institute, it all should be contained among the complete CD player Play System.

Data-signal treatment circuit 300 itself then includes an EFM (eight-to-fourteenmodulation encoding) detuner 320, one CIRC (cross-interleave Reed-Solomoncode, intersection Li Zi-Solomon code) demoder 350, one storages and time controller (RAM; Timecontroller 370), an address generator (address generator) 390, one output buffers (outputbuffer) 460, and tandem output (serial output) 430.EFM detuner 320 is that acceptance is sent by the radio frequency amplifier that shows shown in the figure, directly by the RF data signal of optical read head institute's access on CD of system, so that carry out the demodulation operation.EFM detuner 320 is with circuit 330 and 340 and carry out two-way commissure with microcontroller 400, to carry out its demodulation action under the controlling of microcontroller 400.

The demodulation of EFM detuner 320 output system is sent to the CIRC demoder 350 of its rear end via circuit 325, so that carry out the CIRC sign indicating number decoding operation of the data-signal that come out by institute's access on the CD.CIRC demoder 350 is the signal of controlling of accepting microcontroller 400 with circuit 340, and via two-way circuit 360 and 380 and with storage and time controller 370 commissures so that carry out the decoding action of its CIRC sign indicating number.

The decoding output of CIRC demoder 350 utilizes the circuit 410 as data bus, delivers to data-signal treatment circuit 300 storer 500 in addition, is sent on the output buffer 460 again.As the back will illustrate, do not having to take place because such as vibrating under read head mistake Jiao who is caused and the situation of the jumping onto the tracks, that is flow under unbroken situation at the rf data on the circuit 310, the dependence of system of system to output buffer 460, provides continuously and smoothly music data signal output by sense data in the storer 500.And on the other hand, if flow when interrupting in case rf data takes place, storer 500 mechanism attempt to reply normal focusing and follow rail during, still utilize its stored data and continue supply data to output buffer 460, so that keep the continuous output of data on outlet line 440, in order to avoid the interruption of music signal.Certainly, main points of the present invention are to be, the mechanical realization of optical read head is how to make the data that deposit in the storer 500 when being returned to correct focusing and track bar, keep linking up fully and the also correctness of deviation not of bit group, and music data is connected up.

Storage and time controller 370 be with circuit 382 with 384 and with microcontroller 400 commissures so that under the controlling of microcontroller 400, the decoding of guiding the CIRC demoder to be carried out is moved.On the other hand, storage is also controlled the action that 460 pairs of tandems of output buffer are exported 430 data feeds with time controller 370.

Microcontroller 400 monitors and controls the action of total system, carry out two-way binding between itself and the servomechanism 600, so that see through servomechanism 600, according among Fig. 4 (but as in Fig. 1 or 2 as shown in) that do not show, the back coupling control mode of radio frequency amplifier, and control the mechanical action part of optical disk drive system, that is the mechanical action of CD rotation motor and optical read head.

On the other hand, microcontroller 400 is also controlled whole data-signal treatment circuit 300, is imported the radiofrequency signal of the acquisition of reading from the CD so that handle by circuit 310.It is handled system and comprises necessary processing the such as decoding of carrying out EFM demodulation and CIRC sign indicating number successively, the format conversion reduction of music signal by its former storage coding could be become, by circuit 440 output, can directly drive the signal that loudspeaker produces music by analogue amplifier.

And among this process, when owing to cause optical read head focusing to lose and follow rail when taking off the state of mistake such as factors such as vibrations, data-signal treatment circuit 300 is also carried out data-linkage of the present invention and is moved.For the uninterrupted perfect synchronization of reaching data is connected, microcontroller 400 cooperates data-signal treatment circuits 300 and an external memorizer 500 and carries out its action.Generally speaking, the function mode of system is among Fig. 4, radio frequency amplifier (RF AMP, do not show among Fig. 4) radiofrequency signal RF is delivered to EFM detuner 320 via circuit 310, and solve Q sign indicating number in the subcode by EFM detuner 320, via circuit 330, deliver to microcontroller 400.When microcontroller 400 is received its needed Q sign indicating number, just send actuating signal OPERATION to EFM detuner 320 and CIRC demoder 350 via circuit 340.

When the actuating signal OPERATION on the circuit 340 was not activated, CIRC demoder 350 do not given data by EFM detuner 320.But, in case when the actuating signal OPERATION on the circuit 340 became logic high, EFM detuner 320 will wait by the time next subcode is the Frame of S0, just can begin to transmit data and give CIRC demoder 350.

CIRC demoder 350 whenever decodes music data, will be to be ready for storage of signal READY notice and time controller 370 on circuit 360.Storage is notified CIRC demoder 350 to read signal READ with time controller 370 on circuit 380, the expression data are removed.Storage and time controller 370 simultaneously and control address generators 390 produce the address that gives storer 500, with via data bus 410 with within the writing data into memory 500.

Storage and time controller 370 simultaneously and with fixed frequency, with write signal WRITE notice output buffer 460, make it by reading of data on the data bus 410 on circuit 420 during the system plays music.The data of output buffer 460 then become serial data stream by tandem output (SERIAL OUTPUT) 430 with data-switching, and are sent to the digital to analog converter that does not show among Fig. 4 by circuit 440, for the usefulness of follow-up amplification broadcast.

When servomechanism 600 receives that notice has been vibrated and when causing the signal of forfeiture focusing and the state of jumping onto the tracks, promptly notifies microcontrollers 400 via circuit 450.Microcontroller 400 just draws the actuating signal OPERATION on the circuit 340 and reduces to logic low state, because storage knows that with time controller 370 Frame that is writing at present is to be that frame, it is information for that frame that microcontroller 400 is obtained present Frame by storage and time controller 370.Microcontroller 400 one side demanded storage and time controller abandon the Frame of not write as yet, then order servomechanism 600 to carry out the focusing of optical read head again on the other hand and follow rail action, so that optical read head is returned on the previous frame of this Frame that is writing before the vibration.After read head resets, again the actuating signal OPERATION on the circuit 340 is restarted, so that music data is connected up.

Among system of the present invention, storage and time controller 370 do not need to monitor the subcode of EFM detuner 320 always, but only need discontinuous phenomenon take place at the radiofrequency signal RF on the circuit 310 time, just inform that by microcontroller 400 data that next record is come in are to be NEW BEGINNING, and the subcode of informing new data.Ever after, storage promptly writes down by CIRC demoder 350 to have read in how many data on one's own account with time controller 370.The data of whenever reading in a Frame are (according to IEC 908 standards, the music data of a frame has 98 * 24=2352 bit group), just the Q sign indicating number among the subcode is added one forward, the data that so can automatically write down present CIRC demoder 350 are the data that belong to that frame.

Storage and time controller 370 provide also that the spill-over degree of data gives microcontroller 400 among the storer 500 except the Q sign indicating number that is written into the data in the storer 500 is provided.How the reading speed that microcontroller 400 can make servomechanism 600 control by sense data on the CD CD according to the spill-over level data of this storer so that the data of storing in 500 are unlikely the empty rareness of space, but does not come out to spill-over yet.

But the synchronous linking CD of the present invention's vibration resistance plays the circuit of embodiment among Fig. 4, and the sequential relationship system during its System Operation between each coherent signal as shown in Figure 5.CIRC demoder 350 is ready for signal READY when becoming logic high on circuit 360, promptly sent on circuit 370 by storage and time controller 370 and read signal READ, data are read among the storer 500.Storage and time controller 370 be simultaneously also with fixed frequency, on circuit 420 with write signal WRITE by writing out data among the storer 500 to data buffer 460.

By finding among the sequential chart of Fig. 5, when running into the situation of vibration or storer spill-over, microcontroller 400 just will the number of action OPERATION draws reduces to logic low, so that interrupt the action that EFM detuner 320 send data to give CIRC demoder 350, and replacement CIRC demoder 350.Microcontroller 400 is obtained the data system that is just depositing storer 500 at present in by time controller 370 and is belonged to n Frame, then just order servomechanism 600 to seek the position of n-1 Frame, and start the actuating signal OPERATION on the circuit 340.So EFM detuner 320 promptly when waiting until the subcode of next S0, just begins to transmit data and gives CIRC demoder 350, so music ideally is connected.

Therefore, but obvious disc-playing system framework vibration resistance of the present invention also can be reached synchronous perfect linking of data stream, and the hardware configuration of its actual enforcement, all more known person is simple, but can reach the not perfection of the mistake linkings of a bit group.

Though the present invention has utilized the explanation of preferred embodiment and disclosed as above, so it is not in order to limit the present invention.Anyly have the knack of this skill person under the situation of not deviating from spiritual category of the present invention, change and change when doing some, so protection scope of the present invention is as the criterion when looking the claim person of defining of the present invention.

Claims (12)

1. one kind has synchronously and the CD Play System of anti-vibration functions, and it includes:

One control device, the action of control whole C D Play System;

One servomechanism installation is connected to control device and is controlled and control the rail that follows of the rotating speed of CD CD rotation motor of CD Play System and optical read head;

One storer can store data in the CD CD; With

One data-signal treating apparatus, be connected with described storer with described control device, this data-signal treating apparatus comprises: a radio-frequency (RF) signal input end, can accept optical read head by the radiofrequency signal that reads on the CD CD and amplified by a radio frequency amplifier, to carry out signal Processing; One played data output terminal can export the digital play signal of result to the public address system of CD Play System, plays sound so that send this; One storage and time-controlling arrangement, be controlled by described control device, when servomechanism installation finds that forfeiture focusing of generation optical read head and escape follow the rail state, promptly notify control device, it is to be that frame the played data that control device is promptly obtained the Frame that is writing at present from storage and time-controlling arrangement;

The data-signal treating apparatus more comprises: an EFM detuner, and accept the RF data signal that described radio frequency amplifier sends and carry out demodulation; One intersects Li Zi-Solomon code demoder, accepts the control signal of described control device, and links to each other with time controller with described storage and to decode; One address generator is controlled by described storage and time controller, and described storer is delivered in the address that is produced; One output buffer is accepted the decoding output of described intersection Li Zi-Solomon code demoder and from the data of described storer, is exported continuously; An and tandem output;

Wherein, follow the rail state with escape, or when running into the situation of storer spill-over, control device just interrupts the action of EFM detuner, and the intersection Li Zi-Solomon code demoder of resetting when optical read head forfeiture focusing takes place; It is to be to belong to n Frame that control device is obtained the data that are about in the write store by storage and time controller, and the order servomechanism is sought the position of n-1 Frame, and make the EFM detuner when the predetermined subcode of the next one of waiting until played data occurs, promptly begin to transmit data and give intersection Li Zi-Solomon code demoder, thereby play signal ideally is connected;

Control device one side demanded storage and time controller abandon the Frame of not writing this storer as yet fully, then order servomechanism installation to carry out the focusing of optical read head again on the other hand and follow rail action, so that optical read head is returned to the forfeiture focusing and escape follows on the previous frame of this Frame that is writing before the rail, and after the read head answer normally follows rail and focuses, played data is connected up.

2. CD Play System as claimed in claim 1, wherein, this played data is the music data of music CD.

3. CD Play System as claimed in claim 1, wherein, the S0 subcode in the music data form that this predetermined subcode is music CD.

4. CD Play System as claimed in claim 1, wherein, this control device is a microcontroller.

5. CD Play System as claimed in claim 1, wherein, this control device is a microprocessor.

6. CD Play System as claimed in claim 1, wherein, the public address system of this CD Play System more includes a numeral to Simulation Conversion Assembly, one amplifier and a loudspeaker, wherein should numeral to Simulation Conversion Assembly accept the digital play signal output of this data-signal treating apparatus, convert it to simulating signal, and deliver to this amplifier and amplified, and sound by loudspeaker.

7. one kind has synchronously and the synchronous method that is connected of the played data of the CD Play System of anti-vibration functions, and wherein this CD Play System includes a control device of the action of control whole C D Play System; Be connected to control device and controlled and control the rotating speed of CD CD rotation motor of CD Play System and a servomechanism installation that follows rail of optical read head; Can store a storer of data in the CD CD; With a data-signal treating apparatus, include a storage and a time-controlling arrangement, it also has a radio-frequency (RF) signal input end, can accept optical read head by the radiofrequency signal that reads on the CD CD and amplified by a radio frequency amplifier, to carry out signal Processing, and have a played data output terminal, and the digital play signal of result can be exported to the public address system of CD Play System, play sound so that send this; Wherein, the step of this method comprises:

When servomechanism installation finds that forfeiture focusing of generation optical read head and escape follow the rail state, promptly notify control device;

It is to be that frame in the played data that control device is promptly obtained the Frame that is writing at present by storage and time-controlling arrangement;

Control device demanded storage and time controller abandon the Frame of not write as yet;

Control device order servomechanism installation carries out the focusing of optical read head again and follows the rail action, so that optical read head is returned to the forfeiture focusing and escape follows on the previous frame of this Frame that is writing before the rail;

After the read head answer normally follows rail and focuses, played data is connected up;

Follow the rail state when optical read head forfeiture focusing takes place with escape, or when running into the situation of storer spill-over, control device just interrupts the action of EFM detuner, and the intersection Li Zi-Solomon code demoder of resetting; With

Control device and the data that obtained in the write store just by storage and time controller are to be to belong to n Frame, and the order servomechanism is sought the orbital position of n-1 Frame, and make the EFM detuner when the predetermined subcode of the next one of waiting until played data occurs, promptly begin to transmit data and give intersection Li Zi-Solomon code demoder, thereby play signal ideally is connected.

8. method as claimed in claim 7, wherein, this played data is the music data of music CD.

9. method as claimed in claim 7, wherein, the S0 subcode in the music data form that this predetermined subcode is music CD.

10. method as claimed in claim 7, wherein, this control device is a microcontroller.

11. method as claimed in claim 7, wherein, this control device is a microprocessor.

12. method as claimed in claim 7, wherein, the public address system of this CD Play System more includes a numeral to Simulation Conversion Assembly, one amplifier and a loudspeaker, wherein should numeral to Simulation Conversion Assembly accept the digital play signal output of this data-signal treating apparatus, convert it to simulating signal, and deliver to this amplifier and amplified, and sound by loudspeaker.

Images