CN1106014C - Video disk replaying apparatus - Google Patents
Video disk replaying apparatus Download PDFInfo
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- CN1106014C CN1106014C CN96108236A CN96108236A CN1106014C CN 1106014 C CN1106014 C CN 1106014C CN 96108236 A CN96108236 A CN 96108236A CN 96108236 A CN96108236 A CN 96108236A CN 1106014 C CN1106014 C CN 1106014C
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
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- Signal Processing For Digital Recording And Reproducing (AREA)
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Abstract
To avoid the overlapped use of memories and to simplify the circuit constitution in an optical-disk reproducing device, which can reproduce a video CD, a karaoke CD, a CD-ROM and the like other than music CD. When an optical disk 11 is a music CD, a spindle motor 12 is rotated quicker than a standard speed, the output of an optical pickup 13 undergoes the demodulation of CD-DA signal line in a first digital signal processing means 16 and the signal line is inputted to a shock-proof control means from an information-signal-line dividing means 17. The signal line is read beforehand and accumulated in a memory means 18. The CD-DA signal line is outputted at a standard speed. When the optical disk 11 other than the music CD is reproduced, a system control means 15 stops the shock-proof control means 19 and starts a second digital-signal processing means 1A. Therefore, the signal line other than the CD-DA signal line is inputted to the second digital- signal processing means 1A. With the memory means 18 as the butter memory, the signal line is decoded in real time, and the digital decoded signal line is obtained.
Description
Technical field
The present invention relates to disc reproducing apparatus, in more detail, relate to the using method that changes memory storage according to the kind of playback CD, use the disc reproducing apparatus of memory storage effectively.
Background technology
In recent years, compact disc (calling CD in the following text) is owing to small-sized, and is noticeable in the development of carrying on purposes and the vehicle-mounted purposes.For example, have the CD transducer automobile audio and utilize the car navigation system or the commodity such as portable CD-audio player and CD radio and tape player of the CD-ROM specification of satellite to be popular.CD-audio player drives the focus of light beam at the focus servosystem of the digital signal record face of CD with make the track following servosystem of pencil tracing signal record magnetic track, non-contactly the reading number train of signal.But carry with or car on the CD-audio player used compared with the easier influence that is subjected to external vibration of the CD-audio player of laying, focusing deviation and magnetic track take place easily to jump, cause sound interruption or the discontinuous so-called sound phenomenon of jumping.Thereby, in order to prevent this jumping sound, having had to adopt CD is driven with for example 2 times speed rotation, first reading number train of signal is while be stored in the CD-audio player of storer with the band shockproof function of standard speed playback again.
And advancing video compact disk (Video CD, call VCD in the following text) commercialization of player, establish moving image encoding expert group (MPEG) decoding function in this player, can reset with MPEG1 maximum 74 minutes animation and the sound in addition video compact disk and the Karaoke CD of digital compression record.In order to make this VCD machine also can put the CD disc record, also designing the VCD machine that has shockproof function that music CD disc record is used.
And the application software of using as desktop personal computer and notes type PC and the medium of data or various practicality (utility) software utilize the chance of CD-ROM increasing, and the PC of the CD-ROM drive of the built-in this CD-ROM of putting is becoming main flow.And in PC built-in stereo loudspeaker, can put that stereo sound is happy to have the machine of hi-fi effect also just in commercialization.
Disc reproducing apparatus to existing example is illustrated with reference to the accompanying drawings.In Fig. 4 of the disc reproducing apparatus of the existing example of expression, CD 41 is music CD disc record or other CD, and mounting is fixed on the spindle drive motor 42 rotates, the data of with the light beam playback record of optical pickup unit 43.Optical servo device 44 carries out the servocontrol of spindle drive motor 42 and optical pickup unit 43.46 pairs of digital signals of the 1st digital signal processing device are carried out demodulation process, and it is transformed into the CD-DA train of signal of subcode sign indicating number information and control information and CD disc record and the train of signal beyond the CD-DA.System control device 45 reads from the subcode sign indicating number information and the control information of 46 outputs of the 1st digital signal processing device, and identification is CD disc record or other CD that music is used, or detects system exceptions such as magnetic track jump and focusing deviation.Information signal string branch apparatus 47 becomes CD-DA train of signal and CD-DA train of signal in addition along separate routes with input signal.Protecting against shock control device 49, is exported Yi Bian be transformed into the CD-DA train of signal of standard speed Yi Bian be stored in the 1st memory storage 48 from information signal string branch apparatus 47 inputs CD-DA train of signal at a high speed.Train of signal beyond the 2nd digital signal processing device 4B input CD-DA, on one side the 2nd memory storage 4A is used as memory buffer, be transformed to the output of digital decoding train of signal on one side in real time.D/A converting means 4C is transformed into simulating signal with CD-DA train of signal and digital decoding train of signal.
Action to the optical disc apparatus of existing example with aforesaid structure is illustrated below.At first, the CD of being put 41 is music CD, the demodulation process of the 1st digital signal processing device 46 beginning digital signals, output control information and subcode information.System control device 45 rotates with the speed drive spindle drive motor 42 faster than standard speed under the situation of reading in control information and subcode information identification CD-DA train of signal, monitor system exceptions such as magnetic track jump and focusing deviation simultaneously, if these unusual generations are arranged, just send instruction, carry out the recovery control of optical pickup unit 43 and main shaft 42 to servo servomechanism installation 44.The 1st digital signal processing device 46 is exported CD-DA train of signal at a high speed, is input to information signal string branch apparatus 47.Information signal string branch apparatus 47 divides road direction protecting against shock control device 49 outputs CD-DA train of signal at a high speed according to the control of system control device 45.Protecting against shock control device 49 inputs CD-DA train of signal at a high speed also is stored in the 1st memory storage 48, and the CD-DA train of signal output of standard speed is read and sense data is transformed to the data that will import earlier in regular turn earlier simultaneously.Also have, D/A converting means 4C is transformed to audio signal output with the CD-DA train of signal of standard speed.
Here, in case system control device 45 detects that magnetic tracks jump and focusing such as departs from system exception, control optical servo device 44 immediately, the track location before the CD-DA train of signal interrupts is restarted visit, simultaneously protecting against shock control device 49 output abnormalities is instructed.Protecting against shock control device 49-receives that unusual generation instruction promptly stops the input of CD-DA train of signal at a high speed, stops toward 48 storages of the 1st storage device, and the CD-DA train of signal with 48 storages of the 1st memory storage is transformed to standard speed simultaneously, makes not output interruptedly of music.That is to say that the amount of capacity of the CD-DA train of signal of the 1st memory storage 48 storage makes, though no longer import the also not playback interruptedly of new CD-DA train of signal (as).In this time, finish visit again, restart from normal track location playback (as), then 45 pairs of protecting against shock control device 49 of system control device send and recover normal instruction, the CD-DA train of signal of protecting against shock control device 49 input high speed once again begins to be stored in the 1st memory storage 48 simultaneously.
Secondly, in case the demodulation process of CD 41, the 1 digital signal processing devices 46 beginning digital signals beyond the playback music CD, output control information and subcode information.System control device 45 reads in control information and subcode information, and identification is the train of signal beyond the CD-DA, monitor simultaneously that magnetic track jumps and focusing such as departs from system exception, if there are these unusual, just send instruction, carry out the recovery control of optical pickup unit 43 and spindle drive motor 42 to optical servo device 44.Information signal string branch apparatus 47 will be imported the 2nd digital signal processing device 4B by means of the control of system control device 45 train of signal beyond the CD-DA of the 1st digital signal processing device 46 outputs along separate routes.The 2nd digital signal processing device 4B uses the 2nd memory storage 4A as memory buffer, in real time the train of signal beyond the CD-DA is deciphered processing simultaneously, is transformed to the output of digital signal string.And these digital signal strings that D/A converting means 4C will import are transformed to simulating signal output.
Block diagram 5 to other existing examples describes below.CD 51 mountings of music CD, VCD or Karaoke CD are fixed in spindle drive motor 52 rotations, use optical pickup unit 53 with data playback.The structure of optical servo device 54, system control device the 55, the 1st digital signal processing device 56, information signal string branch apparatus the 57, the 1st storage device 58, protecting against shock control device the 59, the 2nd memory storage 5A, D/A converting means 5C etc. is identical with the existing example of Fig. 4, but different with the structure of Fig. 4 is, the 2nd digital signal processing device 49 is replaced into MPEG decoding treating apparatus 59, can handle the CD-DA train of signal in addition that music is used, the mpeg signal string of VCD and Karaoke CD etc.
The action of the disc reproducing apparatus of other existing examples of structure has explanation below to having as above.At first the CD 51 of Chong Fanging is that the situation of music CD is identical with the movement content of described Fig. 4, so omit its explanation.
Below, playback CD 51 is VCD and Karaoke, in case reset the decoding processing of the 1st digital signal processing device 56 beginning digital signals, output control information and subcode information etc.System control device 55 reads in this control information and subcode information, and identification is the mpeg signal string, monitors simultaneously that magnetic track jumps and focusing such as departs from system exception, if there are these unusual, just, carry out the recovery control of optical pickup unit 53 and spindle drive motor 52 to optical servo system 54 output orders.On the other hand, information signal string branch apparatus 57 will be input to mpeg decode treating apparatus 5B from the mpeg signal string shunt of the 1st digital signal processing device 56 outputs under the control of system control device 55.MPEG decoding treating apparatus 5B uses the 2nd memory storage 5A on one side as memory buffer, Yi Bian in real time mpeg signal is carried out decoding processing, be transformed to the output of each digital video signal string of fixing time and digital audio and video signals string.And this digital video signal string and digital audio and video signals string that D/A converting means 5C will import are transformed to the vision signal and the sound signal of simulation.
Again other Fig. 6 that have the disc reproducing apparatus of example are illustrated below.The CD 61 of music CD or CD-ROM is fixed on rotation on the spindle drive motor 62 by mounting, resets with optical pickup unit 63.The structure of light servomechanism installation 64, system control device the 65, the 1st digital signal processing device 66, information signal string branch apparatus the 67, the 1st memory storage 68, protecting against shock control device the 69, the 2nd memory storage 6A and D/A converting means 6C etc. is identical with the existing example of Fig. 4, and different with the structure of Fig. 4 be, the 2nd digital signal processing device 49 is replaced into CD-ROM decoding treating apparatus 6B, and the train of signal beyond the CD-DA that music is used is applied to the situation of CD-ROM train of signal.
Below another action that has the disc reproducing apparatus of example with above formation is illustrated.At first and since playback CD 61 be under the situation of music CD its move identical with the movement content of the existing example of above-mentioned Fig. 4, its explanation of Therefore, omited.
Next is that CD 61 is the situation of CD-ROM, and CD-ROM one resets, and the 1st digital signal processing device 66 promptly begins the decoding of digital signal and handles output control information and character code information.System control device 65 is speed drive spindle drive motor 62 rotations to be higher than standard speed when reading in this control information and subcode information and being identified as the CD-ROM train of signal, monitor simultaneously that magnetic track jumps and focusing such as departs from system exception, if there are these unusual, promptly send instruction, optical pickup unit 63 and spindle drive motor 62 are recovered control to optical servo main shaft 64.On the other hand, train of signal branch apparatus 67 will be under the control of system control device 65 from the CD-ROM train of signal of the high speed of the 1st digital signal processing device 66 outputs along separate routes, input CD-ROM decoding treating apparatus 6B.CD-ROM decoding treating apparatus 6B uses the 2nd memory storage 6A on one side as memory buffer, Yi Bian in real time CD-ROM train of signal is at a high speed deciphered processing, be transformed to the output of CD-ROM data-signal string.
But, the structure of above-mentioned existing example, protecting against shock function when making music CD playback works, and uses the 1st memory storage, is also using the 2nd memory storage for the VCD that resets, Karaoke CD or CD-ROM etc., therefore, must equip two memory storages, it is big that the circuit scale of system becomes, and consuming electric power increases, battery service time shortens, and the high problem of cost of parts of memory storage is arranged again.
Summary of the invention
The objective of the invention is to solve existing problem.The disc reproducing apparatus that is provided, when putting the music on CD, the 2nd digital signal processing device or its replacement device are stopped, therefore, notice at playback VCD, when Karaoke CD or CD-ROM, do not use the memory storage that uses in the 2nd digital signal processing device or its replacement device, and the memory storage that the protecting against shock function is worked, a memory storage is used on two kinds of different functions effectively, needn't as existing device, equip two memory storages, the miniaturization of circuit system scale, power consumption reduces, make that the service time of battery is long, cost can reduce.
In order to reach this purpose, the structure of disc reproducing apparatus of the present invention possesses:
Mounting fixedly optical disc apparatus make its rotation spindle drive motor,
With the focus of light beam to the optical pickup unit that reads the digital signal of modulation record on the described CD on the record surface,
Carry out the optics control of the Spin Control of described spindle drive motor and described optical pickup unit the light servomechanism installation,
With the digital signal of described optical pickup unit output in addition demodulation process the 1st digital signal processing device,
Carry out the system control device of following control: input is the CD-DA train of signal or the CD-DA train of signal in addition of the basic format of CD from the subcode information difference of described the 1st digital signal processing device output, the output recognition instruction, simultaneously, under the situation that is described CD-DA train of signal, rotate to drive described spindle drive motor than standard speed faster speed, by of the CD-DA signal demodulation of described the 1st digital signal processing device with high speed, start the protecting against shock control device simultaneously, the control that the 2nd digital signal processing device is stopped, with under the situation of described CD-DA train of signal in addition, start the 2nd digital signal processing device, the control that the protecting against shock control device is stopped;
According to the recognition instruction of described system control device with along separate routes information signal string branch apparatus of the CD-DA train of signal of described high speed and the train of signal beyond the described CD-DA,
Input on one side is stored in memory storage by described information signal string branch apparatus described CD-DA train of signal along separate routes, be transformed on one side protecting against shock control device that the CD-DA train of signal of standard speed exports,
Input is used described memory storage by the train of signal beyond the described information signal string branch apparatus described CD-DA along separate routes as memory buffer, be transformed in real time the output of digit translation train of signal the 2nd digital signal processing device and
With the CD-DA train of signal of the standard speed of described protecting against shock control device output or the digit translation train of signal input of described the 2nd digital signal processing device output, be transformed to Analog signals'digital-analog converting device.
And the train of signal beyond CD-DA is under the situation of mpeg signal string, adopts the structure that is replaced the 2nd digital signal processing device by MPEG decoding treating apparatus.
Again, train of signal beyond CD-DA is under the situation of CD-ROM train of signal, the structure that adopts is, the 1st digital signal processing device is to replace the 2nd digital signal processing device input CD-ROM train of signal at a high speed to be transformed to the CD-ROM decoding treating apparatus of CD-ROM serial data output with the device than the fast speed of the standard speed of the music CD rotation drive shaft motor and the high speed CD-ROM train of signal demodulation that will obtain.
The present invention adopts said structure, under the situation of playback VCD, Karaoke CD or CD-ROM, stop in order to make the 2nd digital signal processing device, MPEG decoding treating apparatus or CD-ROM decipher treating apparatus during playback music CD, the memory storage that uses at the 2nd digital signal processing device, MPEG decoding treating apparatus or CD-ROM decoding treating apparatus does not use, therefore, make the memory storage of protecting against shock function action switch use as being used to this memory storage, can use a memory storage effectively in two kinds of different functions.
Description of drawings
Fig. 1 is the block scheme of the disc reproducing apparatus of the present invention the 1st embodiment.
Fig. 2 is the block scheme of the disc reproducing apparatus of the present invention the 2nd embodiment.
Fig. 3 is the block scheme of the disc reproducing apparatus of the present invention the 3rd embodiment.
Fig. 4 is the block scheme of existing disc reproducing apparatus.
Fig. 5 is the block scheme of other existing disc reproducing apparatus.
Fig. 6 is the block scheme of another existing disc reproducing apparatus.
Embodiment
With reference to the accompanying drawings embodiments of the invention are illustrated.In the block diagram 1 of the 1st embodiment of the present invention, CD 11 is music CD or CD in addition, and mounting is rotated on spindle drive motor 12, by optical pickup unit 13 replaying recorded datas.Light servomechanism installation 14 carries out the servocontrol of spindle drive motor and optical pickup unit 13.16 pairs of digital signals of the 1st digital signal processing device are deciphered processing, are transformed to subcode information and control information and music CD-DA train of signal and the CD-DA train of signal in addition with CD.System control device 15 is unusual from the 1st digital signal processing device 16 input control informations and subcode information check system, distinguishes CD-DA train of signal and CD-DA train of signal in addition simultaneously, the output recognition instruction.Control the starting of protecting against shock control device 19 and the 2nd digital signal processing device 1A again and stop.17 inputs of information signal string branch apparatus are the train of signal beyond CD-DA train of signal and the CD-DA from the recognition instruction of system control device 15 along separate routes.
Protecting against shock control device 19 inputs CD-DA train of signal at a high speed, Yi Bian be stored in memory storage 18, Yi Bian it is transformed to the CD-DA train of signal of standard speed.The 2nd digital signal treating apparatus 1A Yi Bian import CD-DA train of signal in addition, uses memory storage 18 as memory buffer, Yi Bian be transformed to the output of digit translation signal in real time.D/A converting means 1B is transformed to CD-DA train of signal and digit translation train of signal the sound signal and the vision signal of simulation.
Action specification to the disc reproducing apparatus that as above constitutes is as follows.At first, music CD is reset as CD 11, the 1st digital signal processing device 16 with digital demodulation signal, be transformed to control information, subcode information and CD-DA train of signal.System control device 15 reads in the control information and the subcode information of the 1st digital signal processing device 16 outputs, the recognition instruction of output CD-DA, and starting protecting against shock control device 19 makes the 2nd digital signal processing device 1A stop simultaneously.Make spindle drive motor 12 with the speed rotation higher again than standard speed, monitor system exceptions such as magnetic track jump and focus bias simultaneously, if these unusual generations are just sent instruction to optical servo device 14, carry out the recovery control of optical pickup unit 13 and spindle drive motor 12.Secondly, the high-speed digital signal of 16 pairs of optical pickup units of the 1st digital signal processing device, 13 outputs carries out demodulation process, is transformed to CD-DA train of signal at a high speed.Then, information signal string branch apparatus 17 makes CD-DA train of signal at a high speed shunt to protecting against shock control device 19 according to the recognition instruction from system control device 15.On the other hand, protecting against shock control device 19 is input CD-DA train of signal at a high speed on one side, is stored in memory storage 18, Yi Bian read the data of input earlier earlier, is transformed to the CD-DA train of signal output of standard speed.At last, D/A converting means 1B is transformed to the CD-DA train of signal of standard speed the audio signal output of simulation.
Here,, control optical servo device 14 immediately, begin to visit again the CD-DA train of signal and interrupt preceding track location, simultaneously protecting against shock control device 19 output abnormalities are instructed in case system control device 15 detects that magnetic track jumps and focusing departs from and waits system exception.Protecting against shock control device 19 1 receives unusual the instruction, promptly stops the input of high speed CD-DA train of signal, stops to memory storage 18 storages, and from the CD-DA train of signal of memory storage 18 outputting standard speed, control is not interrupted music simultaneously.In a word, though the signal of memory storage 18 storage the suitable time can make new CD-DA train of signal not import playback is not interrupted.In this time, finish and visit again, restart from normal track location playback, system control device 15 promptly sends protecting against shock control device 19 and recovers normal instruction, and protecting against shock control device 19 restarts the input of CD-DA train of signal at a high speed simultaneously, again to memory storage 18 storages.
Also have, in case the CD of being put is the CD beyond the music CD, the 1st digital signal processing device 16 begins to carry out the demodulation process of digital signal, is transformed to control information, subcode information and CD-DA train of signal in addition.System control device 15 reads in control information and subcode information, and the recognition instruction of the train of signal beyond the output CD-DA starts the 2nd digital signal processing device 1A, and protecting against shock control device 19 is stopped.And system control device 15 monitors that magnetic tracks jump and focusing departs from and waits system exception, if there are these unusual, just sends instruction to optical servo device 14, controls optical pickup unit 13 and spindle drive motor 12 recoveries.Then, the recognition instruction of information signal string branch apparatus 17 input system control device 15, with the train of signal beyond the CD-DA along separate routes.And the 2nd digital signal processing device 1A imports CD-DA train of signal in addition on one side, and memory storage 18 is used as memory buffer, Yi Bian decipher processing in real time, is transformed to the output of digit translation train of signal.At last, D/A converting means 1B imports this digit translation train of signal, is transformed to simulating signal output.
As mentioned above, the structure of present embodiment possesses:
Mounting is optical disc apparatus 11 fixedly, drive the spindle drive motor 12 make its rotation,
With light beam in focus the optical pickup unit 13 of the digital signal that reads on the CD 11 record on the record surface,
Carry out the optics control of the Spin Control of spindle drive motor 12 and optical pickup unit 13 light servomechanism installation 14,
With the digital signal of optical pickup unit 12 output in addition demodulation process the 1st digital signal processing device 16,
Carry out the system control device 15 of following control: input is from the subcode information of the 1st digital signal processing device 16 outputs, difference is the CD-DA train of signal or the CD-DA train of signal in addition of the basic format of music CD, the output recognition instruction, simultaneously, under the situation that is the CD-DA train of signal with than standard speed faster speed drive shaft motor 12 rotation, by of the CD-DA signal demodulation of the 1st digital signal processing device 16 with high speed, start protecting against shock control device 19 simultaneously, the control that the 2nd digital signal processing device 1A is stopped, with under the situation of described CD-DA train of signal in addition, start the 2nd digital signal processing device 1A, the control that protecting against shock control device 19 is stopped;
According to the recognition instruction of system control device 15 will be at a high speed the CD-DA train of signal and along separate routes information signal string branch apparatus 17 of the train of signal beyond the described CD-DA,
Input on one side is stored in memory storage 18 by the CD-DA train of signal of described information signal string branch apparatus 17 high speed along separate routes, be transformed on one side protecting against shock control device 19 that the CD-DA train of signal of standard speed exports,
Input is used described memory storage 18 by the train of signal beyond information signal string branch apparatus 17 CD-DA along separate routes as memory buffer, be transformed in real time simultaneously the output of digit translation train of signal the 2nd digital signal processing device 1A and
Arbitrary train of signal input with the digit translation train of signal of the CD-DA train of signal of the standard speed of protecting against shock control device 19 output or the 2nd digital signal processing device 1A output is transformed to Analog signals'digital-analog converting device 1B.
Adopt such structure, when putting the music on CD, the 2nd digital signal processing device 1A is stopped, therefore, notice at playback VCD, when Karaoke CD or CD-ROM, do not use the memory storage 18 that uses among the 2nd digital signal processing device 1A, it is switched use as the memory storage 18 that makes 19 actions of protecting against shock control device, a memory storage 18 is used on two kinds of different functions effectively, needn't as existing device, equip two memory storages, the miniaturization of circuit system scale, power consumption reduces, make that the service time of battery is long, cost can reduce.
Below with reference to Fig. 2, the block scheme of the disc reproducing apparatus of the present invention the 2nd embodiment is described.At Fig. 2 CD 21 is music CD, VCD or Karaoke CD, and mounting is fixed in spindle drive motor 22, and rotation under it drives is by optical pickup unit 23 sense datas.The 1st embodiment of structure such as optical servo device 24, system control device the 25, the 1st digital signal processing device 26, information signal string branch apparatus 27, memory storage 28, protecting against shock control device 29 and D/A converting means 2B and Fig. 1 is identical, describes in detail to omit.Different with Fig. 1 is that the 2nd digital signal processing device 1A is replaced into MPEG decoding treating apparatus 2A.The train of signal that therefore can adapt to beyond the CD-DA that music uses is the situation of mpeg signal strings such as VCD and Karaoke CD.
The following describes and have the as above action of the disc reproducing apparatus of the present invention the 2nd embodiment of structure.At first, identical with the situation of the invention described above the 1st embodiment under with the situation of music CD as CD 21, its explanation of Therefore, omited.
With VCD and Karaoke CD during as optical disk data reproducing, the demodulation of the 1st digital signal processing device 26 beginning digital signals is transformed to control information and subcode information and mpeg signal string.System control device 25 reads in the recognition instruction of control information and subcode information output mpeg signal string, starts MPEG decoding treating apparatus 2A simultaneously, and protecting against shock control device 29 is stopped.Monitor that magnetic track jumps and system exception such as focus bias, these are unusual if take place, and just send instruction to optical servo system 24, control the recovery of optical pickup unit 23 and spindle drive motor 22 again.Then, 27 inputs of information signal branch apparatus are from the recognition instruction of system control device 25, with the mpeg signal string along separate routes.Then, MPEG decoding treating apparatus 2A is from information signal string branch apparatus 27 input mpeg signal strings, memory storage 28 is used as memory buffer, decipher processing simultaneously in real time, be transformed to the output of each digital video signal string of fixing time and digital audio and video signals string.And D/A converting means 2B imports this digital video signal string and digital audio and video signals string, be transformed to the vision signal of simulation and audio signal output it.
As mentioned above, adopt the 2nd embodiment of the present invention, at the train of signal beyond the CD-DA train of signal of music CD etc. is that the VCD and the Karaoke CD of CD 21 waits under the situation of the mpeg signal string that comes, possess MPEG decoding treating apparatus 2A is arranged, the 2nd digital signal processing device 1A that replaces Fig. 1, can simplify the circuit structure of decoding treating apparatus with this, because use the memory storage 28 that uses at MPEG decoding treating apparatus 2A at protecting against shock control device 29, only possess portable V CD player and the automobile-used VCD machine that a memory storage 28 just can prevent the cheapness of the jumping sound that external vibration causes simultaneously so can provide at music CD playback time.And the mode that is expressed as MPEG here is not limited to specific thing, but applicable to all modes with the picture signal packed record.
Below with reference to the block scheme of the disc reproducing apparatus of the present invention the 3rd embodiment, be that Fig. 3 describes this device.At Fig. 3, CD 31 mountings are fixed on the spindle drive motor 32 and are driven in rotation, with optical pickup unit 33 replay data.Optical servo device 34, system control device the 35, the 1st digital signal processing device 36, information signal string branch apparatus 37, memory storage 38, protecting against shock control device 39 and D/A converting means 3B etc. constitute identical with Fig. 1 of the 1st embodiment, and it describes omission in detail.And different with the structure of Fig. 1 be that the 2nd digital signal processing device 1A among Fig. 1 is replaced into CD-ROM decoding treating apparatus 3A, is applicable to that the train of signal beyond the CD-DA is the situation of CD-ROM train of signal.
The action of the disc reproducing apparatus of the present invention the 3rd embodiment of structure is illustrated to having as above below.At first, playback CD 31 is under the situation of music CD, and is identical with the situation action of the invention described above the 1st embodiment, its explanation of Therefore, omited.
And playback CD 31 is when being CD-ROM, and the 1st digital signal processing device 36 begins digital signal is carried out demodulation process, is transformed to control information, subcode information and CD-ROM train of signal.System control device 35 reads in control information and subcode information, and the recognition instruction of output CD-ROM train of signal starts CD-ROM decoding treating apparatus 3A simultaneously, and the protecting against shock control device is stopped.Again with speed drive spindle drive motor 32 rotations bigger than the standard speed of music CD, monitor system exceptions such as magnetic track jump and focus bias simultaneously, these are unusual if take place, and just send instruction to optical servo device 34, the recovery of control optical pickup unit 33 and spindle drive motor 32.Then, the high-speed digital signal of 36 pairs of optical pickup units of the 1st digital signal processing device, 33 outputs carries out demodulation process, is transformed to CD-ROM train of signal at a high speed.37 inputs of information signal string branch apparatus are from the recognition instruction of system control device 35, with CD-ROM train of signal at a high speed along separate routes.And CD-ROM decoding treating apparatus 3A uses memory storage 38 from information signal branch apparatus 37 inputs CD-ROM train of signal at a high speed as memory buffer, deciphers processing in real time simultaneously, is transformed to the output of CD-ROM data-signal string.
As mentioned above, adopt the present invention the 3rd embodiment, be under the situation of train of signal of CD-ROM at the train of signal beyond the CD-DA train of signal of music CD etc., have CD-ROM decoding treating apparatus 3A, replace the 2nd digital signal processing device 1A among Fig. 1, the circuit structure of decoding treating apparatus can be simplified greatly, also can use the memory storage 38 that uses at CD-ROM decoding treating apparatus 3A when resetting music CD simultaneously at protecting against shock control device 39, therefore, only can provide and prevent the CD-ROM drive that the corresponding cheap music CD of the jumping sound that external vibration causes resets with a memory storage 38, can realize simultaneously possessing CD-ROM drive, the additional function of the PC excellence of built-in stereo loudspeaker.
And, when in the various embodiments described above, putting the music on CD, as long as or when putting CD-ROM the revolution of spindle drive motor be set at standard speed arbitrarily doubly, as long as and the storer of memory storage 18,28 and 38 is approaching gets back to standard speed when being filled with.
The disposal route that described the 1st～the 3rd embodiment comprises is not limited to the disposal route that each embodiment comprised to be used in combination shown in each embodiment.
Moreover, but much less the present invention is applicable to the replayed portion of recording playback CD certainly.
As mentioned above, disc reproducing apparatus of the present invention possesses:
Mounting is optical disc apparatus fixedly, drive the spindle drive motor make its rotation,
With light beam in focus the optical pickup unit of the digital signal that reads on the CD modulation record on the record surface,
Carry out the optics control of the Spin Control of spindle drive motor and optical pickup unit the light servomechanism installation,
With the digital signal of optical pickup unit output in addition demodulation process the 1st digital signal processing device,
Carry out the system control device of following control: input is from the subcode information of the 1st digital signal processing device output, difference is the CD-DA train of signal or the CD-DA train of signal in addition of the basic format of music CD, the output recognition instruction, simultaneously, under the situation that is the CD-DA train of signal to rotate than standard speed faster speed drive shaft motor, by of the CD-DA signal demodulation of the 1st digital signal processing device with high speed, start the protecting against shock control device simultaneously, the control that the 2nd digital signal processing device 1A is stopped, with under the situation of described CD-DA train of signal in addition, start the 2nd digital signal processing device, the control that the protecting against shock control device is stopped;
According to the recognition instruction of system control device will be at a high speed the CD-DA train of signal and along separate routes information signal string branch apparatus of the train of signal beyond the CD-DA,
Input on one side is stored in memory storage by the CD-DA train of signal of information signal string branch apparatus high speed along separate routes, be transformed on one side protecting against shock control device that the CD-DA train of signal of standard speed exports,
Input is used memory storage by the train of signal beyond the information signal string branch apparatus CD-DA along separate routes as memory buffer, be transformed in real time the output of digit translation train of signal the 2nd digital signal processing device and
With the CD-DA train of signal of the standard speed of protecting against shock control device output or the digit translation train of signal input of the 2nd digital signal processing device output, be transformed to Analog signals'digital one analog converting device.
Adopt such structure, under the situation of putting VCD and Karaoke CD or CD-ROM, the memory storage that the 2nd digital signal processing device uses is when playback music CD, stop the 2nd digital signal processing device, therefore, notice and do not use this point, it is used as the memory storage that makes the action of protecting against shock control device, a memory storage is used on two kinds of different functions effectively, needn't as existing device, equip two memory storages, the miniaturization of circuit system scale, power consumption reduces, make that the service time of battery is long, cost can reduce.
Again, be under the situation of mpeg signal string of VCD and Karaoke CD etc. at the train of signal beyond the CD-DA train of signal of music CD etc., possess MPEG decoding treating apparatus is arranged, replace the 2nd digital signal processing device, can simplify the circuit structure of decoding treating apparatus with this, simultaneously because use the memory storage that uses at MPEG decoding treating apparatus at the protecting against shock control device, only possess portable V CD player and the automobile-used VCD machine that a memory storage just can prevent the cheapness of the jumping sound that external vibration etc. causes so can provide at music CD playback time.
Moreover, be under the situation of train of signal of CD-ROM at the train of signal beyond the CD-DA train of signal of music CD etc., have CD-ROM decoding treating apparatus, replace the 2nd digital signal processing device, the circuit structure of decoding treating apparatus can be simplified greatly, also can use the memory storage that uses at CD-ROM decoding treating apparatus when resetting music CD simultaneously at the protecting against shock control device, therefore, only can provide and prevent the CD-ROM drive that the corresponding cheap music CD of the jumping sound that external vibration causes resets with a memory storage, can realize simultaneously possessing CD-ROM drive, the additional function of the PC excellence of built-in stereo loudspeaker.
Claims (3)
1. disc reproducing apparatus is characterized in that possessing:
Mounting is optical disc apparatus fixedly, drive the spindle drive motor make its rotation,
With light beam in focus the optical pickup unit of the digital signal that reads on the described CD modulation record on the record surface,
Carry out the optics control of the Spin Control of described spindle drive motor and described optical pickup unit the light servomechanism installation,
With the digital signal of described optical pickup unit output in addition demodulation process the 1st digital signal processing device,
Carry out the system control device of following control: input is from the subcode information of described the 1st digital signal processing device output, difference is the CD-DA train of signal or the CD-DA train of signal in addition of the basic format of CD, the output recognition instruction, simultaneously, under the situation that is described CD-DA train of signal, carry out following control: to drive described spindle drive motor rotation than standard speed faster speed, by of the CD-DA signal demodulation of described the 1st digital signal processing device with high speed, start the protecting against shock control device simultaneously, the 2nd digital signal processing device is stopped; Under the situation of the train of signal beyond the described CD-DA, carry out following control: start the 2nd digital signal processing device, make the protecting against shock control device stop,
According to the recognition instruction of described system control device with along separate routes information signal string branch apparatus of the CD-DA train of signal of described high speed and the train of signal beyond the described CD-DA,
Input on one side is stored in memory storage by the CD-DA train of signal of described information signal string branch apparatus high speed along separate routes, be transformed on one side protecting against shock control device that the CD-DA train of signal of standard speed exports,
Input is used described memory storage by the train of signal beyond the described information signal string branch apparatus described CD-DA along separate routes as memory buffer, be transformed in real time the output of digit translation train of signal the 2nd digital signal processing device and
With the CD-DA train of signal of the standard speed of described protecting against shock control device output or the digit translation train of signal input of described the 2nd digital signal processing device output, be transformed to Analog signals'digital-analog converting device.
2. disc reproducing apparatus according to claim 1 is characterized in that, the train of signal beyond the CD-DA is the mpeg signal string, and described the 2nd digital signal processing device is a MPEG decoding treating apparatus.
3. disc reproducing apparatus according to claim 1, it is characterized in that, train of signal beyond the CD-DA is the CD-ROM train of signal, the 1st digital signal processing device is the device that the drive shaft motor is carried out demodulation with the CD-ROM train of signal of the high speed that obtains than the rotation of the big speed of CD standard speed, described the 2nd digital signal processing device is an input CD-ROM train of signal at a high speed, is transformed to the CD-ROM decoding treating apparatus of CD-ROM data-signal string output.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7163443A JP3063576B2 (en) | 1995-06-29 | 1995-06-29 | Optical disc playback device |
| JP163443/95 | 1995-06-29 | ||
| JP163443/1995 | 1995-06-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1147671A CN1147671A (en) | 1997-04-16 |
| CN1106014C true CN1106014C (en) | 2003-04-16 |
Family
ID=15773993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96108236A Expired - Lifetime CN1106014C (en) | 1995-06-29 | 1996-06-28 | Video disk replaying apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3063576B2 (en) |
| KR (1) | KR100217700B1 (en) |
| CN (1) | CN1106014C (en) |
| TW (1) | TW307003B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19858493A1 (en) * | 1998-12-18 | 2000-06-29 | Xsys Interactive Research Gmbh | Local network |
| JP2002015506A (en) | 2000-06-30 | 2002-01-18 | Sanyo Electric Co Ltd | Signal-processing circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089053A (en) * | 1992-12-15 | 1994-07-06 | 索尼公司 | The record and the reproducing device of storage and/or sound data |
| CN1117183A (en) * | 1993-10-07 | 1996-02-21 | 索尼公司 | Servo control system for disk player |
-
1995
- 1995-06-29 JP JP7163443A patent/JP3063576B2/en not_active Expired - Lifetime
-
1996
- 1996-06-06 TW TW085106805A patent/TW307003B/zh not_active IP Right Cessation
- 1996-06-28 CN CN96108236A patent/CN1106014C/en not_active Expired - Lifetime
- 1996-06-29 KR KR1019960025706A patent/KR100217700B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089053A (en) * | 1992-12-15 | 1994-07-06 | 索尼公司 | The record and the reproducing device of storage and/or sound data |
| CN1117183A (en) * | 1993-10-07 | 1996-02-21 | 索尼公司 | Servo control system for disk player |
Also Published As
| Publication number | Publication date |
|---|---|
| TW307003B (en) | 1997-06-01 |
| CN1147671A (en) | 1997-04-16 |
| KR970003059A (en) | 1997-01-28 |
| JPH0917117A (en) | 1997-01-17 |
| KR100217700B1 (en) | 1999-09-01 |
| JP3063576B2 (en) | 2000-07-12 |
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