CN1295689C - Detector presetting pit and hole signal - Google Patents
Detector presetting pit and hole signal Download PDFInfo
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- CN1295689C CN1295689C CNB021460809A CN02146080A CN1295689C CN 1295689 C CN1295689 C CN 1295689C CN B021460809 A CNB021460809 A CN B021460809A CN 02146080 A CN02146080 A CN 02146080A CN 1295689 C CN1295689 C CN 1295689C
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Abstract
The present invention relates to a detector of a presetting pit and hole signal, which is used for detecting the presetting pit and hole signal of an optical disk player in a recording state and a reading state. The detector of a presetting pit and hole signal comprises a gain unit for receiving a wave signal picked from an optical disk piece and generating an adjusting signal, a multiplexer for receiving the wave signal and the adjusting signal, selecting the wave signal or the adjusting signal according to a state signal and generating a cutting signal and a cutting unit for receiving the cutting signal and cutting the cutting signal according to a cutting position standard so as to generate the presetting pit and hole signal. The detector of a presetting pit and hole signal can accurately cut the presetting pit and hole signal by only one cutting unit.
Description
Technical field
The present invention relates to the signal detection technology of CD-ROM device when imprinting state and reading state, the arrangement for detecting of the presetting pit signal when especially utilizing single cutter unit to detect the thunder laser beam of different capacity intensity.
Background technology
General recordable digital audio-video laser disc (Digital versatile disk Recordable, hereinafter to be referred as DVD-R) in order correctly to detect the frequency of wavy track (wobbling tracks), can form presetting pit (pre-pit) in extra position between adjacent track, use the recording address information.Figure 1 shows that the sectional view of CD-RW discsCD-RW.As shown in the drawing, label 2 is dimpled grain (groove), and label 3 is burr (land), and numbers 4 for presetting pit.Because this presetting pit has been formed uniformly the whole surface at DVD-R when video disc dispatches from the factory, so the reference address of this DVD-R (reference address) can be from these presetting pit regeneration (reproduced).In addition, because Writing device is when imprinting state and reading state, the power level of laser light can difference, so the position standard of wave signal also can change.So the presetting pit signal arrangement for detecting must be detected wave signal in different ways according to different capacity intensity.
The U.S. the 5th, 930, No. 222 " presetting pit arrangement for detecting and the information Writing device (Pre-pit detecting device and information recording apparatus employingthe same) that uses this device " patents propose a kind ofly to utilize two groups of circuit for detecting to detect high power state (imprinting state respectively, recording) with low power state (reading state, the method for the presetting pit signal in the time of reading).Fig. 2 shows the Organization Chart of this patent presetting pit arrangement for detecting.As shown in Figure 2, presetting pit arrangement for detecting 19 comprises first comparer, 34 generations, the first comparison signal SC1, second comparer 37 produces the second comparison signal SC2, a sequential generator 43 generation control timing signals and one group of logical circuit according to control timing signal output presetting pit signal Spd.This presetting pit arrangement for detecting 19 also utilizes first low-pass filter 32 and first adder 33 to produce the first cleavage standard (slicing level) S1a1 and utilizes second low-pass filter 35 and second adder 36 to produce the accurate S1a2 of second cleavage.Clock generator 43 is then according to different power ratings, and the output control signal Ssp give sample-and-hold circuit 31, uses when reading state, utilizes first comparer 34 to produce the first comparison signal Sc1.
Though the different institutes of the watt level of thunder laser beam influenced when the method for above-mentioned patent can not read with imprinting, its shortcoming is to need more circuit, and cost is higher.For example, need many one group of circuit for detecting.
Summary of the invention
Because the problems referred to above, the objective of the invention is to propose a kind of gain unit that utilizes and adjust wave signal, and the arrangement for detecting of the presetting pit signal of the presetting pit signal during with single circuit for detecting detecting different conditions.
For reaching above-mentioned purpose, the present invention proposes a kind of arrangement for detecting of presetting pit signal, be used for the presetting pit signal of detected light disc player when imprinting state and reading state, this arrangement for detecting comprises: a gain unit, reception is from the wave signal of CD-RW discsCD-RW acquisition, and, adjust signal to produce one with described wave signal decay; One multiplexer receives aforementioned wave signal and aforementioned adjustment signal, and selects aforementioned wave signal or aforementioned adjustment signal according to a status signal, and produces cutoff signal; And a cutting unit, receive aforementioned cutoff signal, and according to this cutoff signal of the accurate cutting of a cleavage, to produce presetting pit signal; Wherein the peak value of the aforementioned adjustment signal during the imprinting state is substantially equal to the peak value of the aforementioned wave signal when reading.
The present invention also proposes a kind of arrangement for detecting of presetting pit signal, comprises: a gain unit, and receive from the wave signal of CD-RW discsCD-RW acquisition, and described wave signal is amplified, adjust signal to produce one; One multiplexer receives aforementioned wave signal and aforementioned adjustment signal, and selects aforementioned wave signal or aforementioned adjustment signal according to a status signal, and produces cutoff signal; And a cutting unit, receive aforementioned cutoff signal, and according to this cutoff signal of the accurate cutting of a cleavage, to produce presetting pit signal; The peak value of the aforementioned wave signal when wherein, the peak value of the aforementioned adjustment signal during reading state is substantially equal to the imprinting state.
The present invention also proposes a kind of arrangement for detecting of presetting pit signal, comprises: one first gain unit, and receive from the wave signal of CD-RW discsCD-RW acquisition, and described wave signal is amplified, adjust signal to produce one first; One second gain unit receives aforementioned wave signal, and produces one second adjustment signal; One multiplexer receives aforementioned first and adjusts signal or the aforementioned second adjustment signal, and produces cutoff signal; And a cutting unit, receive aforementioned cutoff signal, and according to this cutoff signal of the accurate cutting of a cleavage to produce presetting pit signal; When wherein, aforementioned first peak value of adjusting signal during reading state is substantially equal to the imprinting state aforementioned second adjusted the peak value of signal.
The present invention also proposes the arrangement for detecting of another kind of presetting pit signal, comprises: a variable gain unit receives from the wave signal of CD-RW discsCD-RW acquisition, and adjusts this wave signal according to a status signal with the different gains value, and produces cutoff signal; And a cutting unit, receive the cutoff signal that aforementioned variable gain unit is exported, and according to this cutoff signal of the accurate cutting of a cleavage, to produce presetting pit signal; Peak value when the peak value of cutoff signal when reading state that aforementioned variable gain unit is exported is substantially equal to the imprinting state.
Therefore, the arrangement for detecting of presetting pit signal of the present invention only needs one group of cutter unit can correctly cut out presetting pit signal.
Description of drawings
The sectional view of Fig. 1 display light video disc;
Fig. 2 shows the Organization Chart of known presetting pit arrangement for detecting;
Fig. 3 shows the Organization Chart of first embodiment of the arrangement for detecting of presetting pit signal of the present invention;
Fig. 4 shows the embodiment of the clipper circuit in the arrangement for detecting of presetting pit signal of the present invention;
Fig. 5 shows the Organization Chart of second embodiment of the arrangement for detecting of presetting pit signal of the present invention;
Fig. 6 shows the synoptic diagram of waveform correlation, and wherein Fig. 6 (A) is that presetting pit signal, Fig. 6 (B) are that wave signal and Fig. 6 (D) are cutoff signal for power state signal, Fig. 6 (C);
Fig. 7 is the part enlarged drawing of the synoptic diagram of Fig. 6 waveform, and wherein Fig. 7 (A) is that presetting pit signal, Fig. 7 (B) are that wave signal and Fig. 7 (D) are cutoff signal for power state signal, Fig. 7 (C);
Fig. 8 is another part enlarged drawing of the synoptic diagram of Fig. 6 waveform, and wherein Fig. 8 (A) is that presetting pit signal, Fig. 8 (B) are that wave signal and Fig. 8 (D) are cutoff signal for power state signal, Fig. 8 (C).
Embodiment
Arrangement for detecting below with reference to graphic detailed description presetting pit signal of the present invention.Because the laser disc recorder is different at the power level of the laser light of imprinting when reading, therefore from the CD-RW discsCD-RW reflection and also difference of the size of the wave signal of acquisition.Wave signal when the present invention utilizes a gain unit to different conditions is adjusted, and the cutoff signal that is input to clipper circuit when making different conditions has peak value size about equally.So the present invention is as long as one group of clipper circuit can correctly cut out presetting pit signal.
Figure 3 shows that the Organization Chart of first embodiment of the arrangement for detecting of presetting pit signal of the present invention.As shown in the drawing, the arrangement for detecting 50 of presetting pit signal of the present invention comprises a gain unit 51, a multiplexer 52 and a cutting circuit 53.Gain unit 51 receives the wave signal that captures from the CD-RW discsCD-RW reflection, and this signal is adjusted size, and signal is adjusted in output.For example, when gain unit 51 was wave signal when being used for adjusting high power imprinting state, then this gain unit 51 was the wave signal decay, and the peak value that makes the size of the wave signal after the decay and the wave signal that low-power reads state about equally.And when gain unit 51 was wave signal when being used for adjusting low-power and reading state, then this gain unit 51 amplified wave signal, make the size of the wave signal after the amplification and high power imprinting state wave signal peak value about equally.
Then, arrangement for detecting 50 utilizes multiplexer 52 to select unadjusted wave signal or adjusted wave signal (adjustment signal) according to power state signal, and is output as cutoff signal.For example, when gain unit 51 is when being used for adjusting the wave signal of high power imprinting state, then multiplexer 52 is selected the output signal (adjustment signal) of gain unit 51 when high power imprinting state; When reading state, low-power then selects wave signal.When gain unit 51 is when being used for adjusting low-power and reading the wave signal of state, then multiplexer 52 is selected the output signal (adjustment signal) of gain unit 51 when low-power reads state; When high power imprinting state, then select wave signal.At last, arrangement for detecting 50 utilizes clipper circuit 53 to cut the cutoff signal that multiplexer 52 is exported, and can correctly produce presetting pit signal.
Figure 4 shows that the embodiment of the clipper circuit in the arrangement for detecting of presetting pit signal of the present invention.As shown in Figure 4, clipper circuit 53 comprises a low-pass filter 531, a totalizer 532 and a comparer 533.Low-pass filter 531 receives cutoff signal, and produces the average value signal of a cutting signal.Totalizer 532 produces a cutting voltage after average value signal is added a fixed voltage.Comparer 533 receives cutoff signal and killer voltage, and the output presetting pit signal.This comparer 533 cutoff signal greater than killer voltage time output high levels, and when cutoff signal is lower than killer voltage the output low level.Certainly, clipper circuit is not limited to this kind mode, and for example the generation of killer voltage can be other modes.
Figure 5 shows that the Organization Chart of second embodiment of the arrangement for detecting of presetting pit signal of the present invention.As shown in the drawing, the arrangement for detecting 60 of presetting pit signal of the present invention comprises a variable gain unit 61 and a cutting circuit 53.Variable gain unit 61 receives wave signal, and exports cutoff signal according to the size that the different capacity status signal is adjusted wave signal with different yield values.The gain that the gain of variable gain unit 61 when high power imprinting state is lower than low-power when reading state makes cutoff signal that variable gain unit 61 is exported no matter when which kind of power rating, all have size about equally.
Fig. 6, Fig. 7 and Fig. 8 show the synoptic diagram of the waveform correlation that arrangement for detecting produced of presetting pit signal of the present invention, wherein (A) to be presetting pit signal, (B) for wave signal and (D) be cutoff signal for power state signal, (C).Fig. 7 is 6.745 to 6.77 enlarged drawing for the time in the synoptic diagram of Fig. 6, and Fig. 8 is 6.875 to 6.9 enlarged drawing for the time in the synoptic diagram of Fig. 6.
In the power state signal of Fig. 6 (B), Fig. 7 (B) and Fig. 8 (B), 1 for low-power reads state, and 0 be high power imprinting state.Shown in Fig. 6 (C), wave signal is that a presetting pit pulse that makes progress is arranged between 6.745 to 6.77 in the time, and state is that low-power reads state; In addition, wave signal is that a presetting pit pulse that makes progress is also arranged between 6.875 to 6.9 in the time, and state is a high power imprinting state.Because the state difference, therefore the peak value of two pulses is also different, and one is approximately 0.02, and another is approximately 0.1, differs about 5 times.Therefore, the present invention utilizes gain unit that the wave signal of imprinting state is decayed to 1/5 times, so shown in Fig. 6 (D) and Fig. 8 (D), no matter be reading state or imprinting state, the peak value of cutoff signal is approximately 0.02.Certainly, can also utilize gain unit that the wave signal of reading state is enlarged into 5 times, make the peak value of cutoff signal, all keep being approximately 0.1 no matter be reading state or imprinting state.So the arrangement for detecting of presetting pit signal of the present invention only need utilize one group of clipper circuit can correctly cut out presetting pit signal.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those who are familiar with this art, without departing from the spirit and scope of the invention; when can doing a little change and retouching, so the present invention's protection domain is as the criterion when looking claims scope person of defining.
Claims (10)
1. the arrangement for detecting of a presetting pit signal is used for the presetting pit signal of detected light disc player when imprinting state and reading state, and it is characterized in that: this arrangement for detecting comprises:
One gain unit receives from the wave signal of CD-RW discsCD-RW acquisition, and with described wave signal decay, adjusts signal to produce one;
One multiplexer receives aforementioned wave signal and aforementioned adjustment signal, and selects aforementioned wave signal or aforementioned adjustment signal according to a status signal, and produces cutoff signal; And
One cutting unit receives aforementioned cutoff signal, and according to this cutoff signal of the accurate cutting of a cleavage, to produce presetting pit signal;
Wherein the peak value of the aforementioned adjustment signal during the imprinting state is substantially equal to the peak value of the aforementioned wave signal when reading.
2. the arrangement for detecting of presetting pit signal as claimed in claim 1, it is characterized in that: the aforesaid state signal is that low-power reads state and high power imprinting state.
3. the arrangement for detecting of presetting pit signal as claimed in claim 2 is characterized in that: aforementioned multiplexer is selected aforementioned wave signal output at the aforesaid state signal during for reading state, and selects aforementioned adjustment signal output when the aforesaid state signal is the imprinting state.
4. the arrangement for detecting of a presetting pit signal is used for the presetting pit signal of detected light disc player when imprinting state and reading state, and it is characterized in that: this arrangement for detecting comprises:
One gain unit receives from the wave signal of CD-RW discsCD-RW acquisition, and described wave signal is amplified, and adjusts signal to produce one;
One multiplexer receives aforementioned wave signal and aforementioned adjustment signal, and selects aforementioned wave signal or aforementioned adjustment signal according to a status signal, and produces cutoff signal; And
One cutting unit receives aforementioned cutoff signal, and according to this cutoff signal of the accurate cutting of a cleavage, to produce presetting pit signal;
The peak value of the aforementioned wave signal when wherein the peak value of the aforementioned adjustment signal during reading state is substantially equal to the imprinting state.
5. the arrangement for detecting of presetting pit signal as claimed in claim 4, it is characterized in that: the aforesaid state signal is that low-power reads state and high power imprinting state.
6. the arrangement for detecting of presetting pit signal as claimed in claim 4 is characterized in that: aforementioned multiplexer is selected aforementioned adjustment signal output at the aforesaid state signal during for reading state, and selects aforementioned wave signal output when the aforesaid state signal is the imprinting state.
7. the arrangement for detecting of a presetting pit signal is used for the presetting pit signal of detecting optical driven when imprinting state and reading state, and it is characterized in that: this arrangement for detecting comprises:
One first gain unit receives from the wave signal of CD-RW discsCD-RW acquisition, and described wave signal is amplified, and adjusts signal to produce one first;
One second gain unit receives aforementioned wave signal, and produces one second adjustment signal;
One multiplexer receives aforementioned first and adjusts signal or the aforementioned second adjustment signal, and produces cutoff signal; And
One cutting unit receives aforementioned cutoff signal, and cuts this cutoff signal to produce presetting pit signal according to cleavage standard;
When wherein aforementioned first peak value of adjusting signal during reading state is substantially equal to the imprinting state aforementioned second adjusted the peak value of signal.
8. the arrangement for detecting of a presetting pit signal is used for the presetting pit signal of detected light disc player when imprinting state and reading state, and it is characterized in that: this arrangement for detecting comprises:
One variable gain unit receives from the wave signal of CD-RW discsCD-RW acquisition, and adjusts this wave signal according to a status signal with the different gains value, and produces cutoff signal; And
One cutting unit receives the cutoff signal that aforementioned variable gain unit is exported, and according to this cutoff signal of the accurate cutting of a cleavage, to produce presetting pit signal;
Peak value when the peak value of cutoff signal when reading state that aforementioned variable gain unit is exported is substantially equal to the imprinting state.
9. the arrangement for detecting of presetting pit signal as claimed in claim 8, it is characterized in that: the aforesaid state signal is that low-power reads state and high power imprinting state.
10. the arrangement for detecting of presetting pit signal as claimed in claim 9 is characterized in that: the yield value the when yield value of aforementioned variable gain unit when the aforesaid state signal is reading state is the imprinting state less than the aforesaid state signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021460809A CN1295689C (en) | 2002-10-25 | 2002-10-25 | Detector presetting pit and hole signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021460809A CN1295689C (en) | 2002-10-25 | 2002-10-25 | Detector presetting pit and hole signal |
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| Publication Number | Publication Date |
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| CN1492406A CN1492406A (en) | 2004-04-28 |
| CN1295689C true CN1295689C (en) | 2007-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021460809A Expired - Fee Related CN1295689C (en) | 2002-10-25 | 2002-10-25 | Detector presetting pit and hole signal |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090154894A1 (en) * | 2007-12-12 | 2009-06-18 | Mediatek Inc. | Video signal processing apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11195231A (en) * | 1997-12-26 | 1999-07-21 | Sony Corp | Optical disk recording and/or reproducing device and optical disk tracking control method |
| US5930222A (en) * | 1997-04-07 | 1999-07-27 | Pioneer Electronic Coporation | Pre-pit detecting device and information recording apparatus employing the same |
| JP2002074675A (en) * | 2000-08-31 | 2002-03-15 | Victor Co Of Japan Ltd | Prepit signal detecor and detecting method |
-
2002
- 2002-10-25 CN CNB021460809A patent/CN1295689C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5930222A (en) * | 1997-04-07 | 1999-07-27 | Pioneer Electronic Coporation | Pre-pit detecting device and information recording apparatus employing the same |
| JPH11195231A (en) * | 1997-12-26 | 1999-07-21 | Sony Corp | Optical disk recording and/or reproducing device and optical disk tracking control method |
| JP2002074675A (en) * | 2000-08-31 | 2002-03-15 | Victor Co Of Japan Ltd | Prepit signal detecor and detecting method |
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|---|---|
| CN1492406A (en) | 2004-04-28 |
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Granted publication date: 20070117 Termination date: 20161025 |