TWI225645B - Writeable optical recording medium capable of presetting information and read circuit thereof - Google Patents

Abstract

The present invention is provides a writeable optical recording medium capable of presetting information. The writeable optical recording medium's recording layer is formed by grooves and lands arranged in alternation and connected with each other. There is a wobble between every groove and land adjacent to each other. The wobble is formed by two connected basic waveforms, represented by 0 and 1, respectively. The two basic waveforms have the same cycle but are different in the ratio between the first-half duty cycle and the second-half duty cycle to allow the preset information of the optical recording medium to be recorded in the wobble by means of the combination of the two waveforms. The present invention also discloses a circuit for reading the preset information. The read circuit first uses a band-pass filter to capture a wobble signal from a tracking servo signal before using a waveform shaping circuit to output the wobble signal as a digital-formatted wobble signal. Finally, the read circuit uses a phase-locked circuit to output a clock generating signal having a frequency equal to twice as much as the frequency of the digital-formatted wobble signal.

Description

1225645

[Technical field to which the invention belongs] The present invention relates to an information presetting and reading mechanism, and particularly to an information presetting and reading mechanism of a writable optical recording medium. [Previous technology] 'In order for a writable optical disc to be identified by the disc with its address and parameters in the state of a blank disc, the manufacturer of the disc must pre-set certain episodes on the blank disc. This information Including the manufacturer's recommendations to write the best power, the address of the disc from which the disc can be written is 3 horses, and the actual address of the most important sector. Taking the information presets of CD-R / RW discs as an example, the frequency modulation (FM) method is used to modulate the information in the groove. The jitter is a 23 · 05KHz or 21 · 05KHz string wave, where the high frequency of " 23.05KΗζ is expressed as "丨", and the low frequency of 2105KHz is expressed as "0" ^ The test square can bear at standard speed The amount of information is 42bit * 75Hz, which requires the use of a two-pole phase-locked circuit. On the other DVD + RW discs, a similar mechanism is used to reduce the noise. Phase modulation (Phase Modulation) (pM) is used to adjust the information in the groove jitter. The jitter is a single frequency of 817 5KHz, and the periodic table # 『〇』 with an initial phase of zero degrees, and the periodic table with the initial phase chord U * t. The test square and the product use a fast-speed analog digital integrated circuit chip and a phase lock circuit. The DVD-R / RW disc also has a jitter in its guide groove. But this shaking groove is not used for recording

Page 5 1225645

V. Description of the invention (2) The information is only used for speed control. The actual position for recording preset information is in the so-called "Prepit". The detection of the signal only requires a comparator and a filter. The above three kinds of preset information are hidden in the servo signal, and the DVD disc directly puts the preset information lesson in the read-only area in front of each section. The disc player can detect these information directly in the data signal. If the information is directly pre-engraved or recorded on the data track, it can be detected directly on the data signal, but it will take up real use = recording space, so the common practice is to preset this information on the servo signal ^ 二 but In this way, it is necessary to increase the detection of the desired information in the servo channel ^ plus the delay on the decoding circuit is not conducive to the fast and random memory. [Summary of the invention] The main purpose of the present invention is to provide-write type The information presetting and reading mechanism of the optical recording medium solves the problems mentioned above. To solve the problem of the writeable optical recording media disclosed in the present invention: the f resource is hidden in the signal of the temple, and the information is not modulated by a simple phase or frequency modulation. During the period of the sine wave with a constant frequency of the shaking groove ^ bit, change the logical example of the first half period of fish = one solid to indicate "〇" · "", Τ: The pre-disc information preset method is called phase ratio Modulation

Ratio Modulation (PRM). According to the above concept, the system disclosed in the present invention is composed of a disc-shaped carrier provided with a spiral groove: ":::

1225645 Description of the five inventions (3) The area where the sex user can record, the jitter of the snake, this jitter ^ & = The groove itself is detected in the microscopic regular number, which can be preset within ^ The phase change can be in the non-compliance servo signal. Xunzhi's writable human optical recording = this disclosure-a kind of presettable material is covered with a recording layer, 哕 j ^ β is enclosed by a circular substrate, the substrate road (gr00ve) and the road ^ ^ layer are interlaced The groove track adjacent to the set groove track is connected with the road block (1and), and each phase f: the shaking part is allowed by :: strict, its characteristics, and success, the basic The waveform adjustment type represents a different ratio of the basic waveforms connected to 0 and 1. This makes Xijing and the same, but the combination of the waveforms of the first half cycle and the second half cycle is recorded; The two inventions are stuck in the shaking portion. The reading circuit is more ^ = 丨, the preset information of the writable optical recording medium is taken out and shaken. Ξ: The band-pass filter is -digital ^ shake 'from a tracking servo signal; "skin? The J-type J circuit outputs a clock with a frequency twice that of the wobble signal. The birth signal of the clock with the frequency of the wobble training signal, 'Xiao Yi, is used as a write clock generation circuit to generate detailed ί ί ί ί The characteristics and real β of the present invention are shown in the following as the best embodiment.]: Ξ 碟 = = Τ. It is divided into Protection Layer (Reflection Layer) and Recording Layer (

1225645 V. Description of Invention (4)

Recording Layer) and substrate (PC Substrate), etc., are used to protect the reflective layer from oxidation or scratches, and as a layer to reflect the laser light signal. Substrate Φ m _ Bottom / Day of human ... "Dry u ... 4 ~ 丨 Do not have a β horse printed surface. The reflective layer is used to reflect the laser light signal. The main substrate is _ ρ The above layers and transmit laser light. The recording layer is available The user wrote Λ 次 W # »,, and shell material. Before being used, it is a so-called blank sheet. This layer of material maintains a jade spoon. But the substrate is not flat, but is engraved with a spiral spiral from the center of the circle outward. Pregroove The role of this guide groove is to provide a basis for feeding and producing blanks. The data is recorded in the guide bow to form a data track. Please refer to "Figure 1" is the structure of a conventional optical disc. As shown in Figure 戸, the spiral groove is not a perfect spiral, but with a small snake-shaped track 1 e). As shown in the figure, the optical disc is made of Interlaced recesses = 610 and road block road (land) 6 2 0 abutting and trembling a π rabbitί adjacent groove track 6 1 0 and road block track 6 2 0 Set ** J: The second shaking part 6 3 0 ′, so a shaking part 6 3 0 can be used to record the shaking 1. When the disc drive reads the data, this shaking part 6 The frequency Γΐΐϋ generated at 30 is carried on the tracking servo signal, but since the way of the shake signal = the range to be estimated, it can be separated by using the detection signal, that is, T. Therefore, this shake " performance Please refer to "筮 9 闰, & Display method, concave birch 畆 return" 〃. The two basic waveforms of the preset information table disclosed in the present invention are combined. , Both represent 1-bit tf ρ — the basic period of the sine wave is the same, and the ratio of the period to the second half period is shown.

1225645 V. Description of Invention (5) (duty cycle) is different. Using the characteristics of the first half cycle, logic 0 and logic 丨 can be expressed separately. ~ The first half of the cycle is different (the phase is from zero degrees to -100%, which is convenient to define it as early wobble r ten degrees). The shorter one is from-one hundred and eighty degrees to three hundred and sixty degrees.) Compare: i It is called Π period (phase W0bMe (LW). The proportion of the former half cycle is 丄 ate logic 丨 For example, the first half cycle accounts for 25% of a cycle is 0 and the digital signal has only two types of 0 and 1 indicating ancient accounting for 7 5/6 It is LW. Show "0", LW means "1", you can uncover J, so if you use the EW table to store the preset information. The groove search is pre-engraved to any of EW and LW. "Figure 3 "As an example, if a certain display is shown, the shape of" 〇1 〇1 〇! 0 i "Investing in capital" LW means "1. The present invention proposes to record the preset information in the previous half-cycle using the main and boudoir #" to slosh the grooves? And: :: ratio f :: shake with the same to read the preset in the shake The information in the wobble groove. ^ A circuit is taken. Please refer to "Figure 4" for reading the block diagram of the present invention. , Circuit pulse generating circuit 300 and DI solution. Circuit 4 00 mesh circuit 2 00, MSk Inf〇rmatlon am 0 when writing. The _ at r refers to the information and position code. "No. 4 Figure "Code, that is, under the disc. Port" description of each circuit block such as filter, device 10 = used to turn in a tracking servo signal 501, shake light signal 502. When the disc Machine-readable writable bamboo disclosed by the present invention

1225645 V. Description of the invention (6) type optical recording media, the preset information recorded in the spiral groove will be a combination of EW and LW to form a wobble signal 5 0 2 mounted on the non-compliant servo signal 5 0 1 , So the signal read first must be separated first. Since the frequency of the jittering signal 502 is different from that of the non-compliant servo signal 501, the jittering signal can be separated by the characteristic that the band-pass filter only allows signals of a certain frequency to pass. Therefore, the jitter signal 5 0 2 can be separated from the tracking servo signal 5 0 1 by a band-pass filter. After the shaking signal 5 0 2 is separated, it is input to a phase-locked circuit 2 0 0, and a signal 5 0 3 is generated by outputting a clock. The clock generation signal 503 is a doubled signal, and is provided to the writing clock generation circuit 300 as a basis for generating the writing clock. The writing clock generating circuit 300 generates a clock 5 0 4 according to the clock generating signal 5 0 3 as a basic clock when writing data. When the optical disc drive rotates, the rotation speed is not continuously maintained at a fixed speed, and a slight error will occur with different time points. This will cause the frequency of the shaking signal 502 to change all the time. In order to avoid the inability to write data or wrong data due to the relationship between speed and frequency error, the frequency of writing data must be fixed, and this frequency is related to the frequency of the jitter signal 502. The phase-locked circuit 2 0 0 will output a clock signal 5 0 3 according to the wobble signal 5 0 2 and also output a preset information signal 5 0 5 at the same time. The jitter signal 5 0 2 is output by the band-pass filter 100, which corresponds to the information preset on the jitter groove. It consists of two basic waveforms similar to a sine wave, which is an analogy. Signal form. The preset information signal 5 0 5 represents the preset information.

Page 10 x ^^ 645 l. Description of the invention (7) = $ 旒 For the system, it is a series of logic _; waveforms, so the phase-locked circuit 200 outputs the preset data; two 21 groups duc decoding circuit 4 0 0, in order to solve the record recorded in the trembling ditch will be included only McCoy "Figure 5", is the phase-locked circuit circuit suppression & waveform 疋 type circuit 2 1 0 'a phase frequency detection Circuitry, package. 25 2 Oscillator 2 3 0, —the first divider 240, a second divide by 1〇 „1, one electric wave and one square wave. 电 Γ: used to shake the analog form The burst circuit of the signal 502 (including a cutting circuit (SllCe0 and the rising edge will trigger the material ^ g ^ dge trigger), in which the cutting circuit is triggered at the root with j = number 502 for cutting, And the rising edge triggers the circuit signal 506. For example, the two levels of the signal 'is a digital form of shaking to represent the LW. As shown in Figure 3', the high level represents EW and the low level voltage 'controls the oscillation. The frequency signal, after the output clock of # f 2 3 0, generates a signal 5 0 3 is a double signal 5 0 7 and returns to the% a frequency division circuit 2 4 0, and outputs a first The frequency-dividing and frequency-reducing signals 5 ^ 7 to the phase frequency detection circuit 2 2 0 will be equal to the level after frequency division. The phase ^ rate detection < frequency + rate is usually the same as the digital form of the jittering signal 5 0 6 phase No. 5 0 6 and the _ division, L 'Road 2 2 0 will detect and compare the digital form of the jitter signal will be converted into electrical signals *, signal 5 07 for phase comparison, the phase difference signal 508 after the comparison to control the electrical < 'Output-Controlled & Controlled Oscillator Output Frequency and Voltage Controlled by Transient Wave Adjustment

Page 11 1225645 V. Description of the invention (8) The output frequency of the oscillator is the input signal output clock to generate the signal 5 0 3, which is then transmitted through ^, and is controlled by the voltage phase frequency detection circuit 2 2 0. The first frequency divider 2 4 0 feeds back to the phase frequency detection circuit 2 2 0, * segment J 24 0 +-phase-locked loop, input] 2; 2 3 0 and frequency division generating circuit 3 0 0 The benchmark of the clock. The signal 5 0 3 is used as a phase-locked circuit which further includes a frequency division circuit 2 5 0. The clock generates a signal of 5 °, and the electric power is equal to 2 6 0 and the first division frequency ^, and a second division signal 509 is output. The second divider divides the frequency by 250 pulses. The second is the basis for detecting the shaking signal. Break the system with the second division of y for a while and place it on the shaking groove tiger 5 0 6 to trigger the falling edge to get the g signal. The private road decodes the driveable and read mechanism disclosed by the corresponding capital affairs according to the preset Gongxun 505, and has information presets for the I ^ ^ first disc recording media to limit the preferred implementation The example reveals the spirit and scope β of the above, but not; when: does not depart from the scope of the present invention, it is necessary to regard this description as clever and easy = ⑵ 1225645 The diagram is a simple illustration of the first diagram, which is a structural diagram of a conventional optical disc; the second FIG. 3 is a method for displaying preset information disclosed in the present invention; FIG. 3 is an embodiment of storing preset information using the present invention; FIG. 4 is a block diagram of a circuit for reading the information preset in the present invention; Figure 5 is a circuit block diagram of the phase-locked circuit preset by the information of the present invention: Description of graphical symbols] 100 200 210 220 230 240 250 250 260 300 400 501 502 503 504 505 506 507 508 Bandpass filter phase-locked circuit waveform Stereotype circuit Phase frequency detection circuit Voltage control oscillator First frequency division circuit Second frequency division circuit Shake signal detection circuit Write clock generation circuit DIAC Decoder circuit Servo signal Shake signal Clock generation Invest Signal Shake signal in digital form First frequency division signal Control signal

Page 13 1225645 Schematic description of signal 5 0 9 Second frequency division 610 Notch circuit 62 0 Block track 6 3 0 Shaky part

Claims (1)

1225645 6. Scope of patent application 1. A concave circular substrate with preset information can be placed on the substrate, which is interlaced with each other (1 and) to form a shake between the roads. The proportion of the second half of the basic period is not known. The two waves can be used. 3.—Writable optical media have the same generation period. The optical recording in the optical recording system has two different waveforms. This makes the combination of waveforms: a band-pass, a jitter, and a waveform filter. Shaking signal circuit in the form of a fixed potential, a phase-locked writable optical recording medium, including a recording layer covered by the recording layer, which is formed by a groove and a block track, and each phase Adjacent groove tracks and road blocks are characterized by the following: The two basic waveforms, which can represent 0 and 1, respectively, have the same period, but the first half of the period is the same, which makes the optical recording medium's preset data The combination of shapes is recorded in the shaking portion. The single period of presettable information and writeable light The single cycle of the waveform is a readout circuit that represents the preset information of a 1-bit recording medium. The recording layer has a wobble part. The wobble part table The basic waveforms of 0 and 1 are connected, the base, but the preset information of the recording medium in the ratio of the first half cycle to the second half cycle can be used in the two kinds of the wobble parts, and the reading circuit includes, for inputting a Follow the servo signal and output it to output the shaking signal as a number; and output the shaking signal according to the digital form. Page 15 1225645 6. Scope of patent application A clock generation signal is used as a reference for writing a clock generated by a clock generation circuit. 4. The readout circuit for preset information of a writable optical recording medium as described in item 3 of the scope of patent application, wherein the waveform shaping circuit includes a cutting circuit and a rising edge trigger circuit. 5. The readout circuit of the preset information of the writable optical recording medium as described in item 3 of the patent application scope, wherein the phase locked loop includes a phase frequency detection circuit and a voltage controlled oscillator. 6 β The readout circuit of the preset information of the writable optical recording medium as described in item 3 of the patent application scope, wherein the phase locked loop further includes a first frequency divider for generating the clock The signal is divided into a first frequency division signal equal to the frequency of the wobble signal, and the first frequency division signal is fed back to the phase frequency detection circuit. 7. The readout circuit for preset information of the writable optical recording medium as described in item 3 of the scope of the patent application, which further includes a wobble signal detection circuit for detecting the wobble signal according to the digital type. Preset information output of the recording medium. 8. The readout circuit of the preset information of the writable optical recording medium according to item 3 of the scope of the patent application, which further includes a second frequency divider for dividing the clock signal into an equal to the jitter. The second frequency-divided signal of the signal frequency, and the wobble signal detection circuit outputting the second frequency-reduced signal. Page 16