CN1530840A - Disk vibratnig addressing method by amplitude deviation modulation mode - Google Patents

Abstract

In the present invention, physical address information to be recorded is recorded on optical disc notch in jetter form by using ASK modulation means in order to provide frequency used in servo control operation of basic shaft or in data recording/playing for optical disc being able to be recorded with DVD-RW and so on or physical address information which moving unit of set recording size is not decoded is recorded on optical disc notch in jetter form by utilizing ASK modulation means so that not only original data recording volume for recording actual data is kept but also simplified normal jitter phase synchronous loop is utilized to accurately decode physical address information.

Description

Utilize the CD shake addressing method of amplitude excursion modulation system

(1) technical field

The present invention relates to a kind of CD shake method for addressing of utilizing the amplitude excursion modulation system.Refer in particular to and utilize the amplitude excursion modulation system, will on the CD that DVD-RW etc. can write down, need the physical address information that writes down in advance, record the groove of CD with the shake form.

(2) background technology

The general CD that can write down, CD such as DVD-RAM or DVD-RW for example, frequency for record/broadcast that servo running of Control Shaft or data are provided etc., on the record surface of CD, want recording physical address information in advance, if above-mentioned DVD-RAM, then the shake addressing method of suitable CAPA (Complementary Allocated PitAddressing) mode; If above-mentioned DVD-RW, then the shake addressing method of suitable LPPA (Land Pre-Pit Addressing) mode.

The shake addressing method of MSK (Minimum Shift Keying) modulation system has appearred again utilizing recently.The above-mentioned shake addressing method that is applicable to the CAPA mode of DVD-RAM, its advantage be, it is a physical addressing, and the head in each sector writes down the address information of each sector in the mode of pre-pit, therefore can carry out the addressing of each sector.But exist simultaneously, in the data recording field of physical record data, with sector unit record address information, thereby the data recording capacity of physical record data is with the shortcoming that is reduced.

The shortcoming of the shake addressing method of LPPA (the Land Pre-Pit Addressing) mode that DVD-RW uses is, along with the variation of the reasons such as state of the inclination of CD, record/broadcast condition, CD, the address decoder function reduces.In addition, recently the shortcoming of the shake addressing method that utilizes the MSK modulation system that occurs is, because of frequency not necessarily, multiple frequency content and reason such as deposit, and make the shake phase synchronous loop become complicated.

(3) summary of the invention

Purpose of the present invention is exactly in order to address the above problem, and provides the shake addressing method to the CD that can write down.Promptly, provide the frequency that is used for main axle servo control running or data recording/broadcast for the CD that can write down to DVD-RW etc., with amplitude offset key ASK (Amplitude Shift Keying) control method, the physical address information that will write down is recorded in the record pit groove of CD with the shake form, or use the ASK modulation system, will be recorded in the record pit groove of CD with the physical address information of shake unit's pre decoding of decided record size with the shake form.

In order to achieve the above object, the present invention utilizes the CD shake addressing method of amplitude excursion modulation system, it is characterized in that it comprises: utilize the physical address information of the CD that the amplitude excursion modulation system can write down, be modulated to the first step of pulse signal; With the pulse signal after the above-mentioned modulation, be recorded in second step of the record pit groove of above-mentioned CD with the shake form.

Again, utilize the CD shake addressing method of amplitude excursion modulation system, it is characterized in that it comprises: the physical address information that utilizes the CD that amplitude excursion modulation ASK mode can write down, with shake unit's pre decoding of decided record size, the first step that makes CD shake addressing; With the pulse signal after the above-mentioned modulation, be recorded in second step of the record pit groove of above-mentioned CD with the shake form.

Effect of the present invention:

The invention relates to the CD shake addressing method that utilizes the amplitude excursion modulation system.Provide the frequency that is used for a servocontrol running or data recording/broadcast for the CD that can write down to DVD-RW etc., with amplitude offset key ASK (Amplitude Shift Keying) control method, the physical address information that will write down is recorded in the record pit groove of CD with the shake form, or use the ASK modulation system, will be with the Moving Unit of decided record size, the physical address information of not decoding is recorded in the groove of CD with the shake form as yet, both kept the data recording capacity of original record real data with this, utilize the general shake phase synchronous loop of simplifying, the physical address information of can decoding exactly again.

For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

(4) description of drawings

What Fig. 1 represented is the modulation waveform of being exported by amplitude excursion modulation (ASK) mode that is suitable in the CD shake addressing method among the present invention;

What Fig. 2 represented is by the jitter modulation mode, promptly to utilize amplitude excursion modulation (ASK) mode that is suitable in the CD shake addressing method and the modulation waveform of exporting among the present invention;

What Fig. 3 represented is, amplitude excursion modulation (ASK) waveform of the data of the embodiment precoding in according to the present invention;

What Fig. 4 represented is, the embodiment in according to the present invention is formed on the shake image of CD groove;

What Fig. 5 represented is to be applicable to the formation in general push-pull detection of the present invention loop;

What Fig. 6 represented is, according to the waveform of the detected dither signal of embodiments of the invention;

What Fig. 7 represented is, is applicable to the formation of general shake phase synchronous loop of the present invention.

Symbol description about major part in the accompanying drawing:

10: limiter 11: the phase error detector

12: wave filter loop 13: voltage-controlled oscillator

(5) embodiment

Below, the embodiment about the CD shake addressing method that utilizes the amplitude excursion modulation system among the present invention elaborates with reference to accompanying drawing.

At first, being applicable to the ASK modulation system of CD shake addressing method among the present invention, is according to the having or not of pulse, and the sinusoidal wave Modulation and Amplitude Modulation of characteristic frequency is become the modulation system of analog value, and the pure mathematics formula of above-mentioned ASK modulation system is as follows.

Formula (1):

$S_{\mathrm{ASK}}=\sqrt{\frac{2E_i\left(t\right)}{T}}\sin (2\mathrm{\π}{f}_{c}t+\mathrm{\φ})--\left(1\right)$

Here, i=1,2,3...M, M, 0≤t≤T according to above-mentioned mathematical formulae, supposes M=4, the modulation waveform of ASK, as shown in Figure 1, E _i(t)=1 o'clock, 4 sinusoidal waveforms of output in the one-period (T); E _i(t)=0 o'clock, will export 0 pulse waveform in the one-period (T).

On the other hand, as follows about the mathematical formulae of the jitter modulation method of utilizing above-mentioned ASK modulation system.Formula (2):

$S_{\mathrm{ASK}}=\sqrt{\frac{2E_i\left(t\right)}{T}}\sin \left(2\mathrm{\π}{f}_{c}t\right)----\left(2\right)$

Here, i=1,2,3...M, 0≤t≤T, f _c=f _w(shake path frequency), T=T _b=1/f _w(data input cycle), as shown in Figure 2, during M=1, ASK modulation waveform, E _i(t)=1 o'clock, data input cycle (T=T _b) 1 sinusoidal waveform of interior output; E _i(t)=0 o'clock, data input cycle (T=T _b) in will export 0 pulse waveform.

Again, during M=2, E _i(t)=1 o'clock, data input cycle (T=2T _b) 2 sinusoidal waveforms of interior output; E _i(t)=0 o'clock, data input cycle (T=2T _b) in will export 0 pulse waveform.During M=3, E _i(t)=1 o'clock, data input cycle (T=3T _b) 3 sinusoidal waveforms of interior output; E _i(t)=0 o'clock, data input cycle (T=3T _b) in will export 0 pulse waveform.

Again, the above-mentioned jitter modulation method of utilizing the ASK modulation system can be used M=1, and 2,3,4, several different methods such as 5... are that the example detailed description is then as follows during with M=1.

At first, in the shake addressing method of CD, when utilizing the ASK modulation system, with the arbitrary code value pre decoding of input data with prior setting, for example, as shown in Figure 3, the input data can be with 8 shake ASK of unit modulation, this moment is to the pre-code data of 8 shakes, above-mentioned input data be 0 o'clock be ' 11101110 ', above-mentioned input data be 1 o'clock be ' 11111110 '.

That is, above-mentioned input data are 0 o'clock, export the ASK modulation waveform that 3 sinusoidal waveforms and 0 pulse waveform repeat 2 times, and above-mentioned input data are 1 o'clock, export the ASK modulation waveform of 7 sinusoidal waveforms and 0 pulse waveform.

On the one hand, this ASK modulates unit with 4,6, and 8,10... Deng 2n+4 (n=0,1,2...) shake unit can change use, for example, with 4 the shake ASK of unit whens modulation, to the pre decoding data of 4 shakes, the input data be 0 o'clock be ' 1010 ', above-mentioned input data be 1 o'clock be ' 1110 '.

Again, utilize the CD of the shake addressing method of above-mentioned ASK modulation system, for example, data are not recorded in (Land) field, level land and are recorded in groove record GOR (Groove OnlyRecording) mode in groove record pit track field, be applicable to CDs such as DVD-RW, as shown in Figure 4, to the address information of physical address units such as sector and ECC piece dither signal, be recorded in the grooved tracks field with the shake form for the pre decoding data of being modulated by above-mentioned modulation system.

On the one hand, the dither signal of the pre decoding data of being modulated by above-mentioned ASK modulation system, to detect the loop from general push-pull signal as shown in Figure 5, be the A that is split into the output of 4 parts in the receipts light factor (PD) that comprises of light picker, B, C, D field electric signal, utilize the common loop factor to export (A+B)-(C-D) continuously, can directly use the general push-pull signal detecting circuit of detection corresponding to the push-pull signal of shake form.

Again, as shown in Figure 6, benchmark with prior setting is a rank, the sine-shaped dither signal of amplitude limit, detect the shake data, the shake data of its detection are compared with 8 units, if ' 11101110 ' then shows ' 0 ', if ' 11111110 ' then shows ' 1 ', the physical address information of can simply decoding.Therefore, shake phase synchronous loop for the output physical address information, as shown in Figure 7, can directly use the general shake phase synchronous loop that constitutes by limiter 10, phase differential mistake detecting device 11, filtrator loop 12 and voltage-controlled oscillator (VCO) 13.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims (5)

1, a kind of CD shake addressing method that utilizes the amplitude excursion modulation system is characterized in that it comprises:

First step: utilize amplitude excursion modulation ASK mode, the physical address information of the CD that can write down is modulated to pulse signal;

Second step:, be recorded in the record pit groove of described CD with the shake form with the pulse signal after the above-mentioned modulation.

2, a kind of CD shake addressing method that utilizes the amplitude excursion modulation system is characterized in that it comprises:

First step: utilize amplitude excursion modulation ASK mode, the physical address information of the CD that can write down with shake unit's pre decoding of decided record size, makes CD shake addressing;

Second step:, be recorded in the record pit groove of described CD with the shake form with the pulse signal after the above-mentioned modulation.

3, the CD shake addressing method that utilizes the amplitude excursion modulation system as claimed in claim 2, it is characterized in that in the described first step, the CD shake method for addressing that can write down, also comprise described physical address information, with 2n+4 (n=0,1,2, the 3...) step of shake unit pre decoding.

4, the CD shake addressing method that utilizes the amplitude excursion modulation system as claimed in claim 2, it is characterized in that in described second step, the CD shake addressing method that can write down, physical address information with described pre decoding, utilize the amplitude excursion modulation system, after being modulated to pulse signal, also comprise, be recorded in the step of the record pit groove of described CD with the shake form the pulse signal after the described modulation.

5, the CD shake addressing method that utilizes the amplitude excursion modulation system as claimed in claim 3, it is characterized in that the described CD shake addressing method that can write down, also comprise, the dither signal that the shake form of described record pit groove is read, benchmark with prior setting is the rank amplitude limit, after detecting the shake data, the step of the pre decoding physical address information that shows of comparing with described 2n+4 shake unit.

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