TWI337349B - Apparatus and method for demodulating adip symbols and apparatus for decoding pre-pit symbols - Google Patents

Description

349 Patent Specification No. 96120113 Revision Date: 99.12, 15 IX. Description of the Invention: [Technical Fields of the Invention] In particular, it is related to the optical disc drive Ys (wobble signa丨) according to the present invention. Processing [Prior Art] DVD and 〇) data is encoded and recorded on a spiral-shaped track on the surface of the sheet. If the disc is burnable, the 兮 spiral will periodically sine wave the f wave from the orbital direction: the offset is called "wobble" (w〇bble), and the disc Therefore, the sine wave frequency of the u signal on the ego lane is called the wobble signal carrier frequency (wobble earn.er = eqUency), and the (four) slices of different formats may be different. The wobble signal carrier frequency. For example, the DVD-R or DVD RAM pendulum action number has a carrier frequency of M0.6 kHz, and the ^Q+(4)(4) money carrier is freshly 81 7.4 kHz. In order to extract the data on the optical disc, the optical disc drive first detects the wobble signal on the optical disc by the wobble signal detecting circuit. Therefore, the design of the wobble signal ^ circuit has a great influence on the performance of the disc player. The optical disk drive uses a pick-up head to detect the intensity of the RF reflected signal moving along the spiral track to oscillate = the number. The first la to H pictures are the read head detection signals of the optical disc machine. Figure 1a shows the wobble signal without data, and the waveform of the wobbled signal is similar to a sine wave. When the data is recorded on the disc, the waveform of the wobble signal is no longer similar to a sine wave. Usually - the read head simultaneously uses four 0758-A32246TWFl (201〇J〇28) 6 1337349 No. 1st detail of the monograph which Lin correction day TM15 = sense, A, B, c, D respectively sense the orbital reflection The light of the signal: 苐 lb diagram and ic diagram respectively show that the oscillating signal with data is generated by ^ 4_Sad and SBC', wherein the photosensor is the composite signal sAD, and the photo sensor is the resultant =唬sBC. Since the phase of the synthetic money Sad and the opposite is reversed, the information recorded on the optical disc = track can be obtained by adding the signals sad & Sbc.

= If the Id picture is not in the evening, the wobble signal carrier can be obtained by subtracting the letter and sBC. The AD 2 picture is a block diagram of a conventional wobble signal detecting circuit 2 that detects Absolute Time In Preg_e (ATIP). The pre-groove absolute time is a method of modulating the wobble t information such as cd_r or cd_rw. Since there is only a message in the meaning of the specific frequency range, the band-passing wave μ _ heart is 5 唬 W 〇 ' to obtain the filtered wobble signal W1. The device 204 then converts the analog wobble signal w' to the bit k η n D . The pre-groove absolute time detector is then extracted from the wobble signal D by ATIpftfi, and the phase-locked loop 2〇8 2 digits of the swing money D is obtained by D (four) fresh-time clock not shown). The picture of the red Tibetan brother 3 is to detect the pre-groove address of the motion signal detection circuit 3 〇 〇 block diagram. Pre-groove position: R or _ the address of the wobble signal with H tone # = There is a specific frequency range of the wobble signal Wq /, thinking, suffocation, so first by the low-pass filter 3U and Passing 0758-A32246TWFI (20 Ϊ 01 〇28) 7 1337349 Revision Date: 99.12.15 Patent Specification No. 96120113 modifies the wave converter 302 and filters the swing signal? Tiger w〇 to obtain the transitional wobble signals 1 and W2. The analog-to-digital converters 314 and 304 then convert the analog wobble signals w, and W2 into digital wobble signals & and pre-groove address detection 1 3G6 and then extract the ADIP 1K by the digital wobble signal. The phase locked loop 3〇8 locks the phase of the digital swing signal 以 to obtain a _clock signal (not shown) having the same frequency as the digital swing signal D 2 . The bandpass filter of the second diagram, the waver 202, and the bandpass chopper 3〇2 of the third figure are the τ-pass; Analog bandpass filters have complex circuit geometries and require large wafer areas to accommodate their complex circuitry. The wafer area of the analog π-pass filter typically occupies more than a half of the area in the wobble signal circuit. In addition, the analog bandpass filter requires a large amount of current for filtering the analog wobble signal, which consumes a large amount of power. Therefore, the wobble signal detecting circuit requires a digital band pass filter to avoid the above disadvantages. / 4 is a block diagram of the conventional circuit for detecting the frequency of the wobble signal. The wobble of the figure 丨d is first sent to an automatic gain module 々ο], which is swung by the automatic gain module 402. The voltage of the signal is amplified to the extent that the subsequent = piece can be processed. The bandpass filter 4G4 then filters the amplified wobble signal out of the desired band of noise. Then, when the high-pass filter 4〇6 filters out the DC portion of the processed wobble signal, the two-bit converter converts the wobble signal into a 2-bit data stream. Then, the pulse counting module (Edge Counting Module) 410 detects the pulse wave and calculates the number of pulse waves in a fixed time to obtain the wobble signal carrier frequency (10): Me 〇75S-A32246TWF1 (201〇|〇28) 8 1337349 Date: 99.12.15 Patent Specification No. 9612Π3 modifies this carrier frequency). However, the carrier frequency of the wobble signal obtained by the pulse wave calculation module 410 may be "incorrect due to noise caused by the wobble signal of the first d picture. Although the narrow band pass filter tree filters the noise of the wobble signal, Not all noise is filtered out. The residual noise of the wobble signal may interfere with the conversion process of the two-bit converter 408, thus generating an erroneous two-bit data stream, which in turn causes the pulse wave calculation module to completely calculate the error. The pulse wave number gets the wrong (four) money lag frequency. The bandpass filter 4〇4 is the analog band pass wave, the circuit structure is complicated and (4) a large amount of crystallography. The form of the wobble signal is recorded in the track of the optical disc. In order to extract the information from the wobble signal, the wobble signal must be amplified to a specific voltage range before processing: therefore, the wobble signal debt measuring circuit uses an automatic gain controller (a_matic gain co Uer, 縦) to control the gain of the input oscillating signal. The oscillating signal system in the circuit knows the automatic gain controller is analogy and the analogy of the automatic gain controller needs a large number of The bandwidth of the gain controller. Because of the large area of the circuit with high capacitance, this circuit is usually placed on the chip - the u #接接; however, the automatic gain controller and the external power:: face connection requires additional wheels In and out of the chip pin, it will increase the cost of the board. Bit *=The automatic gain controller in the signal detection circuit is in the number of % " to avoid the problem of large capacitance. Figure 5 is the digital automatically increased 0758-Α32246Τ WF1 (201 〇1 〇2g) 1337349 Revision date: 99.12.15 Patent specification No. 9611/3 modifies the block diagram of the OPC 500. The digital automatic gain controller 5〇〇 includes an analog variable gain amplifier (variab丨e gain) Ampiifier) 51〇, analog to digital converter 504, envelope detection module (envd〇pe such as Shen (10) nu) dule) 502, digital control module 5〇6, digital to analog converter 5〇8. The variable gain amplifier 51 放大 amplifies the input signal & according to the gain signal M to obtain an amplified signal s], and the analog to digital converter 5〇4 then converts the signal S!′ into a digital signal S〇. Surface detection module 5〇2 Then, the envelope surface E of the digital signal So is detected. Then, the digital control module 5〇6 determines a gain signal M according to the envelope surface E, and the digital to analog conversion to 508 converts the digital gain signal M into an analog gain signal μ. In order to control the amplification process of the analog variable gain amplifier 51. Therefore, the signal gain of the digital automatic gain controller 500 is determined digitally by the digital control module 506, so that the large capacitance of the analog automatic gain controller is not required. Since the input signal S contains high frequency noise caused by data or write pulse, the amplified signal S! has the same frequency as the input signal S1. In order to comply with the Nyquist sampling theorem, the analog to digital converter 5〇4 must convert the signal & to a digital signal S0 at a sampling frequency that is twice the highest frequency of the signal S!'. In addition, the resolution of the envelope surface signal E must be high enough to allow the digital control module 506 to adjust the gain signal 依据 based on the envelope surface signal E. Therefore, the analog to digital converter 5〇4 must generate a digital signal S〇 with a high signal resolution. The high sampling rate and high resolution of the signals So, Ε, Μ make analog to digital converter 504, envelope detection module 502, digital control module 506, and digital to analog converter 5 (10) 0758-A32246TWF1 (20101028) 1337349 Revision Date·· 99.12.J5 Patent Specification No. 96丨201丨3 modifies the signal processing process and circuit structure complexity, thereby greatly increasing the hardware cost of the clamp automatic gain controller 500. Therefore, it is necessary to have a digital automatic gain controller with a simple signal processing process.有 When writing data to a disc, there are different ways to address the disc. If the disc is in the DVD + R or DVD + RW format, it is an excuse to record the address of the obstruction area of the disc disc by the Address In Pregroove (ADIP). If the disc is in the DVD-R or DVD_RW type, the Land Pre_pit is recorded by the land to record the address of the disc area of the disc. Therefore, when the optical disk drive writes data to the optical disk, it is necessary to demodulate the pre-groove address or decode the pre-pit. “The pre-groove address is modulated by the type of the wobble signal and recorded on the disc=up. According to the specifications of DVD+R and DVD+RW, each of the two blocks of the disc includes 93 wobble signal periods' of which 8 The wobble signal period is used to store the information of the slot address. The eight wobble signal periods may be positive phase or negative phase ' @ 8 wobble signal periods. The positive and negative phases of the different row lists are not different #元(四). The pre-groove address symbol contains three kinds of symbols, which are sync symbols (sync), data symbols, and data symbols. Figure 6A shows the same symbols with pre-grooved addresses. The wobble signal 61. The wobble signal 610 includes 8 wobble cycles including 4 negative wobble periods (4 pins) and 4 positive wobble periods (4 pw). If the negative wobble period is converted to ADIP bit 1, the positive wobble period When converted to an ADip bit, the wobble signal 610 can be represented by a sequence of ADlp bit sequences "lm〇〇〇〇". Fig. 6B and Fig. 6C are the data with pre-grooved address respectively. 0758-A32246TWFH20101028) my date of revision · · 99.12.15 Patent specification of No. 96120113 and the swing signal of 620, 630 . The 8-solid swing period of the wobble signal 620' is included in order! There are one negative swing period, one positive swing period, and one negative swing period, and thus the wobble signal 62〇 can be represented by a series of fine p ^ sequences "1GGGGQU". Similarly, the eight wobble periods of the wobble signal (4) sequentially include one negative wobble period, three positive wobbles, two negative wobble periods, and two positive wobble periods, so that the wobble signal 630 can be a string of eight (10) The bit sequence "10001100" is used to indicate / Fig. 7 is a process for explaining a conventional method of swinging a signal with pre-grooved address information. The demodulated wobble signal is shown in the second block of Fig. 7. A reference wobble signal having the same fundamental frequency and phase as the positive wobble period of the demodulated wobble signal is shown in the first row of Fig. 7. The phase difference between the demodulated wobble signal and the reference wobble signal is measured and displayed on the third line of Fig. 7. Since the reference wobble signal indicates the phase of the positive wobble period', therefore, if there is a large phase difference in the phase difference signal, the wobble signal indicating demodulation is in the negative wobble period. Phase 3: The signal can be converted to the Amp bit value of one of the 4th lines by the slicer. The series of ADIP bits are directly compared with the alignment of the Amp symbol, the data 0 symbol, and the (4) 1 symbol. Since the bit Tt string in the figure is "(10) coffee!", the wobble signal of the second line is demodulated into data symbols. Although the conventional technique of Fig. 7 is simple, there is noise in the swing money, which affects the generation of the phase difference signal. The phase difference signal 'corrector' that gets the noise will produce an erroneous ADIP bit based on the wrong phase difference signal. At this point, the wrong Amp bit can not be found. The string 0758-A32246TWF1 (20101028) The revised period: 99.12.15 The patent specification of 96]20113 corrects the corresponding ADIP value, so the ADlp cannot be demodulated. Fu Yuan. Therefore, a method of demodulating the ADIp symbol value with higher noise tolerance is required. The disc format of the DVD-R or DVD_RW format is based on the address of the area of the pre-pit (Pre Pit) #5 recorded disc. According to the dvD_r and DVD-RW specifications, each error correction code block (err〇r = iT: eCti〇nc〇de block) contains 16 data segments (sect〇r), each of which includes 26 A data frame (frame) t) 26 data segments are divided into odd data frames and even data frames, each data frame containing δ wobble cycles. Each of the two data frames contains 3 pre-plt bits to store the address information. Figure 8 shows the pre-pits contained in the wobble signal 8〇〇 of two consecutive data frames 802 and 812, wherein the data frame 8〇2 is an odd data frame and the data frame is an even data. frame. The three pre-pits of the data frames 802 and 812 may appear in the first three wobble signal periods 804, 806, 808 of the odd data frame and the first three wobble signal periods 814 of the even data frame 812, respectively. 816, 818. ° The three pre-groove bits in the two consecutive data frames can represent even sync, odd sync, data 〇, or data j 兀. Figure 9 shows the information content of the four pre-pits (pi'e-pit symbols) that can be represented by the three pre-pits. If the pre-pit symbol indicates the synchronization information located in the even data frame, the three pre-pit bits 歹j are "〗 1". If the pre-pit symbol represents the synchronization information in the odd data frame, the three pre-pit bits are arranged as "n〇". If pre-cut 2280758-A32246TWF1 (2010J〇28) 1337349 No. 96120113, the patent specification is amended. Date of amendment: 99.12.15 If - indicates the material, then the two pre-pits are arranged as "1" The pit symbol represents the data "^ Beacon U, then the two pre-pits are arranged in _". "The position of the crater is 丨, the top of the period with the pre-pit motion signal contains - 3 waves (s_ pulse), and when pre-engraved a few: 〇 'with pre- The top end of the wobble signal period of the pit bit is not so 'can be based on the wobble signal period of two consecutive data frames 』 whether the glitch is included to determine the pre-pit bit value, and then according to the pre-pit number 7L value Determine the value of the pre-pitted symbol. d and 'The above method of determining the pre-pitted bit value may cause serious errors when the oscillating number has noise. The wrong pre-pits ^ 兀 value of course leads to The wrong pre-pitted symbol value. Therefore, there is a need for a method for determining the pit bit value with a higher noise tolerance. Furthermore, the conventional blank area of the optical disc is detected by detecting a binary radio frequency signal ( The transient interval of the binary RF signal (transient _(4)). The RF# is first generated by the optical pickup. Then the binary RF is used to remove the low-frequency noise from the RF signal with a high-pass chopper. The slicer is binary filtered according to a reference threshold value. Frequency signal. Since the amplitude of the RF signal of different disc types is different, 'the RF signal of different disc types cannot be binarized by the same-reference limit value. Therefore, the optical disc drive needs a kind of detection suitable for different RF signal amplitudes. The present invention is directed to providing a demodulation pre-groove 〇 758-A32246TWF1 (2010J028) ^ 337349 Revision date: 99. 丨 2.15 No. 96120113 Patent Specification Revision of this address (Addresslnpregroove, ADIP) symbol device to solve the problem of the prior art. The pre-groove address symbol is included in a wobble signal of the optical disc. The pre-groove address symbol is included according to various Arranging a plurality of pre-groove address bits in one of the arrangement patterns. In one embodiment, the apparatus includes a wobble signal generation module, a reference wobble signal generator, a waveform difference measurement module, and a symbol type matching module, wherein the wobble signal generating module generates a wobble signal from the optical disc. The reference wobble signal is generated. The device generates a test swing signal, and the frequency and phase of the reference wobble signal are the same as the fundamental frequency and phase of the positive wobble cycle of the wobble k. The waveform difference measurement module measures the wobble The difference between the signal and the reference wobble signal to obtain a series of difference measurement values, wherein the difference measurement values respectively correspond to the pre-groove address bits. The symbol type matching module is based on the difference of the waveforms The measured value compares the probability that the pre-groove address bits meet the arrangement pattern, and determines the pre-groove address symbol. The invention also provides a demodulation pre-groove address (Address ratio Preg_e, ADIP) ) The method of the symbol. The wobble signal of one of the optical discs includes the pre-groove address character it'. The pre-groove address symbol includes a plurality of pre-grooved address bits arranged according to one of a plurality of permutation patterns. First, a wobble signal is generated from the optical disc... 吮^(1)匕(10)丨). Then, a reference wobble signal is generated, and the frequency and phase of the reference wobble signal are the same as the fundamental wobble period of the chirped wobble signal (the basic frequency and phase of the heart (1) to WQbble. Then, the measurement signal and the reference 0758-A32246TWF1 ( 20101028) 1337349 Revision date · · 99,12,15 The patent specification of No. 96120113 modifies the difference 'to get - a series of difference measurement I: the value corresponds to the pre-groove address bit. The waveform difference measurements compare the probability of the conforming patterns, and determine the pre-groove ^- s - 〇 1) heart? . 3; 2 decoding pre-pitted symbol (4) coffee 夂: In the middle, the pre-pitted symbol contains a plurality of pre-pits arranged according to a plurality of arrangement patterns " Each: modulo: The device for decoding the f-pit symbol includes 1 concave dip: two distance generating array, and - symbol type determining mode, and two _ pit bit collecting module collecting appearing in a pendulum _ = (4) = frame) and even f _even frame) pre-pits: wide to - pre-pitted bit sets, wherein the pre-pits appear in the odd frame or the even data frame The pre-engraving of the pre-etched bit set for a lifetime = , :: ί The Hamming distance of the 型 column type (ha_-g distance). = 4 4 The decision module finds the smallest of the Chinese and Japanese distances in the arrangement to determine the pre-pit symbol. The above and other objects, features, and advantages of the present invention are set forth in the accompanying drawings.

The figure 10 is based on the invention. The yj-nrt- /^ · I only Sfc moves the detection circuit i 〇 (8) 0758-A32246TWF1 (2010! 028) 16 1337349 The patent specification No. 96120113 amends this revision date :99.12 15 Block diagram. The optical disc is read from the RF signal reflected from the optical disc and paid to W Sa, Sb, Sc, Sd, where the signal SB ’

Sc and the RF signals that respectively reflect the different sides of the reflection from the game, and the SSD are added to obtain the signal SAD0, and the signal Sb and

Sc is added to get the signal. . Thanks to the letter, Tiger SAD. And SBC. Including the low-frequency noise caused by the south frequency noise and feeding signal caused by the age, so the low-pass filter and the high-pass filter]004 and 1014 respectively give the south and low frequency parts to the lack of signals. One: one or two automatic gain controllers 1006 and 1 16 are then amplified to appropriate amplitudes to obtain, 3 and . The subtractor combiner subtracts sBC3 from b tiger sAD3 to obtain a wobble signal w〇. The closer the signal s is to the SBC3 amplitude, the more the residual signal is in the wobble signal ^; Π The wobble signal W is reduced. Distortion, by anti-distortion 』 (transform al_g fi) ter) 1022 _ wobble signal wo number 1. When the wobble signal W1 is passed through a high-pass filter (4), the (four) W2 [analog to digital converter] 〇 26 converts the analog wobble signal W 2 into a digital wobble signal d i . ~ Digital wobble signal D] with pre-groove absolute time (10) (5) account Delete ^ ~ just Ve, ATIP) data is modulated to - frequency range. The bit slot absolute time data 'digital band pass filter, wave machine coffee receiving number D, and the digital wobble signal Di is removed in a frequency band range "' to the digital swing signal D2. Pre-groove absolute time detection. 】 032 receiver from the digital swing signal to take out the pre-groove absolute time 〇 758-A32246TWFl (20l 〇 | 〇 28) 1337349 Revision date: 99.12.15 The first 1201] No. 3 patent specification to amend this information. The wobble signal phase-locked loop 1034 then locks the phase of the digital wobble signal D2 to produce a clock signal (not shown) having the same frequency as the digital wobble signal A. In addition, the pre-groove address ratio

The PregKKwe, ADIP) detector 1〇28 captures the pre-groove address information from the digital wobble signal. Since the analog-to-digital converter i 〇2 6 converts the analog wobble signal w into a digital wobble signal Di, the band-pass filter 〇3〇 can use the digital side to filter the digital bit money D) to generate a digital county money. The "wave processing" digital filtering process has the characteristics of simple signal processing. The -string sample of the digital signal is regarded as the variable of the filter function to generate the filtered and post-signal samples. In contrast, the class_phase requires complex circuit design sub-contains. Circuit elements such as resistors and capacitors are used to complete the wave. In addition, the analog filter requires a large amount of current to drive the filter circuit = electricity. Therefore, compared to the conventional swing signal detection = the sway signal detection of the consuming two-pass filter 1030 Circuit 1000 has an early circuit structure, low power consumption. Another and the low 的 的 弟 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U No 闾敕 ΛΛ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , (4) the same, If analogy to the digital converter, the sampling rate conversion analogy of the wobble signal 'signal ~ then the loader' " and other chopping == moving signal carrier solution and change its center frequency. L will not be based on pendulum 0758 -A32246TWFl(2〇1〇1〇28) 1337349 苐96120113 Patent Specification Amendment Revision Date: 99.12.15 Death The same 'analog to digital converter】〗 〖6 has the same frequency as the analog swing L唬w2 The clock signal is driven (four) and the analog analog w2 is sampled. Therefore, the sampling rate of the analog to digital converter nG6 can be changed as the frequency of the wobble signal changes. In the embodiment, the analog analog to the digital converter Μ106 The clock signal is generated by the phase-locked loop (1) 4. In another embodiment, since the optical disc rotates at a fixed angular velocity, the frequency of the wobble signal can be estimated based on the address information of the analog wobble & and the analog to digital conversion The sampling frequency of the device can be adjusted according to the address information. Fig. 12 is a diagram of a wobble signal detecting circuit with a bit analog to digital conversion crying 12 0 6 according to the present invention. Block diagram. To confirm: the post-transition wobble signal D2 has a good product f, analogous to the digital converter 1206. The wobble signal % is sampled at a high sampling rate. To simplify the filtering process of the digital bandpass filter 1210, the input The resolution of the wobble signal D] to the digital bandpass filter is reduced. In one embodiment, the second class: the bitwise converter 1206 is a 1-bit analog to digital converter, a decision maker (decmonmaker), or a comparison. To convert the wobble signal w into a wobble signal D1 of the bit stream. If the analog to digital conversion cries 1206 is a 1-bit analog to digital converter, the sampling rate must be 8 times the carrier frequency of the binary signal. . ° ° & present invention provides a wobble signal path with a digital band pass filter. Unlike analog bandpass filters, digital bandpass filters do not require complex circuit structures' and thus occupy a small circuit area and require less: dynamic current, which reduces the power consumption of the wobble signal detection circuit and + 0758 -A32246TWF1 (20101028)

I I Amendment date: 99.12.15 The 9th coffee No. 3 and the m revision correct the wafer area. The disc type VI is the block diagram of the invention for detecting the wobble signal and the push-pull processing ί 300. The device 300 includes a disc m D. Push-pu11 processor) 1320 and a frequency detection and "identification module 1304. Push-pull processor" 32 〇 之 ^ (4) ' _ 贞 及 及 and disc format recognition module identification number (four) frequency (four) (four) α _ Zhao like .. '.. Frequency detection and optical disc format recognition module 1304 knows the circuit structure and operation mode of the circuit, and uses the light frequency to identify the optical disc format. The new = road in the invention The residual white and miscellaneous conditions in the wobble signal generated by the push-pull processor 132Q do not affect the detection of the frequency detection and the optical disc format recognition module 1304 for the wobble k carrier frequency. ^ : First, simultaneous scanning The L-waves SA, SB, sc, and SD are obtained by the reflected signal intensity of the track of the optical disc. Similarly, the signals SAD and sBC are synthesized from the signals Sa, Sb, Sc, and SD, and the signals Sad and Sbc are as shown in the lb and lc. The push-pull processor 1320 then processes the signals Sad and Sbc to generate the signal Si in Figure 13. The push-pull processor 丨32〇 includes low pass filters 1312 and 1322, high pass filters 1314 and 1324, and Adding controllers 1316 and 1326, and subtractor 1330. Low pass filter 131 2 and 1322 remove high frequency noise from signals sAD and sBC: high pass filters 1312 and 1322 filter low frequency noise from signals Sad and Sbc. Then, automatic gain controllers 1316 and n26 will filter the signals. sAD and sBC are enlarged to the same level, and the subtractor 丨33〇 will be placed on 758-A32246TWFli2010J〇28) 1337349 苐%]20]] Patent Specification No. 3 Amendment Revision Date: 99.] 2..5 Large After the white number Sad subtracts the signal Sbc to obtain the signal I. The frequency pre-measurement and the disc format recognition mode 'the disc's wobble signal clipping frequency. Since: = different wobble signal carrier frequency, if the wobble letter is determined Recognizable wire format q format. Frequency (4) measurement and optical disc 2 identification module 13〇4 includes anti-aliasing filter (anti_aiias

332, DC partial elimination module 334, two-bit conversion module 36, adjustable band pass filter 1342, frequency intrusion module 1344, and optical disc format recognition module (10). The frequency (four) measurement and the (four) slice format recognition module 1304 will be further described with reference to Figs. The figure is a block diagram of a device 1400 for detecting the carrier frequency of a wobble signal in accordance with the present invention. The device 14 is a secondary module of the frequency detection and optical disc format recognition module U04, including an anti-aliasing filter 1332, a DC cancellation module 1334, a binary conversion module 1336, and an adjustable bandpass filter |342 And frequency detection module 1344. The anti-aliasing filter 1332 limits the frequency 1 of the signal S 彳 to the signal 旒 S2 that conforms to the shannon_NyqUist sampling theorem. In one embodiment, the inverse distortion filter 1332 is a low pass filter. Before the signal S2 is analog-to-digital converted by the binary conversion module 1336, the DC component of the signal S2 is first removed by the DC cancellation module 334 to obtain the signal S3. In one embodiment, the DC cancellation module 丨 334 is a Boss. The binary conversion module 1336 then converts the analog wobble signal to a binary data stream. In one embodiment, the binary conversion module 1336 is a comparator. The adjustable bandpass filter 1342 is then modified according to a tunable frequency band range of 0758-A32246TWF1 (20101028). The patent specification of the 96120113 is revised. The correction date is: 99.12.15. The second frequency, n2 Γ &, the adjustable frequency band range The center frequency can be adjusted according to the 13 magic signal. Figure 15a shows the oscillating signal Ss of the tunable bandpass filter. The frequency selection signal may indicate an adjustable band range of the adjustable band=^ wave state 1342, so that the adjustable band pass filter complex filter filters the binary data stream % by a preset frequency band range, and the second preset The union of the band ranges and the carrier frequency of the wobble signal can overlap the $il. For example, the tunable bandpass filter operates on a fixed frequency band to filter the binary bit stream S4, and the preamble frequencies can be centered at fsl~fs7, respectively. The component of the binary data stream & only the tunable band range is passed by the tunable bandpass filter 1342 to produce a filtered signal S5. An example of the signal S5 is shown in the 15th b = the 7-page fixed-band range is a sequential transition binary data stream S4, so the waveform of the apostrophe S5 has 7 different segments, and each segment corresponds to a predetermined frequency band. One of the ranges. ~ A frequency detecting module 1344 then determines the wobble of the optical disc based on the filtered signal & The frequency detection module 344 includes a 匕, ., σ plane detection module 14 〇 2 and a maximum amplitude detection module! The heart envelope detection module 402 detects the envelope surface of the signal S5 to obtain an envelope signal 唬S6' as shown in Fig. 5c. The envelope surface signal % of the first sibling map contains seven different amplitudes hi~h7, corresponding to seven different predetermined frequency band ranges of the tunable bandpass filter 1342, respectively. Since the envelope surface signal s6 is the envelope surface of the filtered signal Ss, the amplitude response signal of the envelope surface signal & is filtered by the tunable bandpass filter 342. The larger the amplitude of the envelope signal %, the stronger the intensity of the filtered signal & and the signal is 0758-A32246TWFH20101028) 1337349 Revision date: 99.12.15 Patent specification No. 96120113 Correction of the bandpass filter 1342 by frequency selection The more predetermined components of the signal chirp are, and thus the center of the predetermined frequency band of the chirp is near the wobble signal carrier frequency. Therefore, the I/1 rate of the wobble signal of the optical disc can be estimated as the center frequency of the envelope region signal S6 having the maximum amplitude region in the predetermined frequency band corresponding to the pass filter 1342: Refer to FIG. 15b and g 15c, The maximum amplitude of the envelope surface signal % is h4'. This region corresponds to the center frequency of the band range of the adjustable bandpass chopper 13 is fs4. Therefore, the frequency detecting module (10) determines the wobble signal carrier frequency as fs4. Figure 16 is a block diagram of a device (8) for discriminating an optical disc format in accordance with the present invention. Device _ is the secondary module for frequency detection and optical disc format recognition module 1304. The manner and composition of the operation of the device 1600 is similar to that of the device 1400. Since the optical discs of different formats have different wobble signal carrier frequencies, the format of the optical disc can be recognized when the carrier frequency of the wobble signal is determined. Therefore, the devices 1600 and M00 can share most of the modules. The 1600 includes an anti-aliasing filter 1332, a DC cancellation module Gw: a binary conversion module 1336, an adjustable bandpass filter 1342, and an optical disc format recognition module. Group 1344. The optical disc format recognition module 1344 includes a second envelope detection module 1602 and a maximum amplitude detection module 16〇4. The device 16A is similar to the included module of the device 1400 except that the frequency selection signal of the bandpass filter 1342 can be adjusted. The disc format includes DVD+R, DVD-R, DVD_IUM, DVD-RW, DVD+RW, and the possible wobble signal carrier frequency corresponding to the disc format is successively designated as the adjustable band pass filter of FIG. 16 crying 0758 -A32246TWF1 (20101028) 1-337349 Amendment date: 99.12.15 No. 96120] Patent Specification No. 13 modifies the center frequency of the filter band of this 1342. Filtering the two bits according to the filter band~"state 1342 followed by s5. Then, the pupil,,, U, L heart, to obtain the filtered signal 3 according to the test disc format recognition module 1346 to scoop ^ fine number, Envelope surface to obtain the envelope surface;:; 7 measurement, : amplitude selection module _ find the envelope surface, disc format recognition mode, group 134, take the large towel field. Accept the final envelope signal S6 Κ # 光盘片片 Format is a large-scale one, and the identification of the brother 17 is a flow chart of detecting the optical disk moving method according to the present invention. In the step coffee = the first-swing signal of the fresh square optical disk. In step 17〇4; signal ί DC part to get the first: convert the brother to a swing signal for a two-bit data stream 'to a tunable bottle book dazzle wm on v Shao I 708 order, ^ positive The frequency can be filtered to filter the two-bit signal, wherein the adjustable frequency range::/Shield:: Filters a frequency selection signal and adjusts. Then, in step, according to the maximum amplitude of the filtered signal. Next, in the middle, determine the adjustable frequency band range corresponding to the large filtered signal. : If there is no need to identify the disc w in step 1714, the output of the surrounding core 1 718 is the maximum ψ3谇, 忐, r. The work, the shell 1彳 in the step ώ the adjusted frequency corresponding to the filtered signal - The center frequency of the dry circumference is the wobble signal carrier frequency ^^ frequency π to identify the disc format, then in step 1716 17 Μ moderately after the signal corresponding to the optical disc format /, 疋 输出 output maximum amplitude provided by the invention _ County (4) Method of slice format. The noise in the wobble signal will not be affected; according to 07:>8'A32246TWF1 (20101028) 24 1337349 Revision date: 99.12.15 ^ Patent specification No. 96120113 Corrects the swing of this detection Signal carrier frequency. Therefore, the circuit provided by the present invention is superior to the conventional circuit. In addition, since the tunable band pass filter is a digital filter, it has a simpler circuit structure and occupies a smaller wafer area. Reduce the production cost of the circuit. , ' Figure 18 is the block diagram of the wobble signal detection circuit 1800. Since # #u SAD()& sBCG contains low frequency noise caused by high frequency noise and servo signals caused by RF signals News, therefore The low pass filters 1802 and 812 and the high pass filter delete 1814 from the signal Sad and s (10) filter out the high frequency and low frequency noise, and finally get the signals sAD2 and sBC2. The two automatic gain controllers 1806 and 1816 then amplify the SAD2 And Sbc2 to the same amplitude to obtain Saw and SBCS. Subtractor 820 then subtracts SbC3 from SAD3 to obtain wobble signal w. The closer the signal is to the amplitude, the less RF noise remains in wobble signal W〇. When the wobble signal wQ passes through the low pass filter 1822 to obtain the wobble signal %, the pre-groove address (ADIP) detector 1824 extracts the pre-grooved address from the wobble signal w]. When the wobble signal w〇 passes through the band pass filter 832 to know the wobble signal W2, the wobble signal phase-locked loop (phase 〇cked loop, PLL) 1 834 generates a clock signal according to the wobble signal... (not shown) . • Figure 19 is a block diagram of a digital automatic gain controller 1900 in accordance with the present invention. The digital automatic gain controller 19〇{} includes an envelope surface detecting module 1902, an analog to digital converter, a 9〇4, a digital control module, a digital to analog converter, a 9〇8, and a variable gain amplifier ( Variable gain amplifier) 1910. Analog variable gain amplifier 丨9】〇According to the gain signal 0758-A32246TWF1 (20101028) 1337349 Revision No. 96120113 Patent Revision Date: 99.12.15 Zoom in to get a magnified letter. . The signal W is rounded up by the signal W or '' and the signal S is rotated. Can be the figure W sAD3 or sBC3. The envelope surface detection module 19〇2 then detects the envelope surface E. Next, analog to digital converter 4 converts the envelope signal £ into a digital envelope signal that does not resemble the amplified signal s on the envelope surface signal E. As is the case with the digital signal, the analog-to-digital converter does not need to measure the envelope signal e at a high sampling frequency as in the fifth diagram. A digital control module 丨9〇6 is then determined based on the envelope surface signal—the gain signal Μ is used to amplify the input signal §|. When the digital to analog recording, the gain signal is converted into an analog gain signal ^, the amplifier 191G amplifies the input signal sf according to the gain signal 以 to obtain the output signal s〇. The sampling rate of the analog-to-digital converter i 9〇4 reduces the envelope surface signal E and the gain signal M. The rate of (4) to digital (n) processing and circuit complexity. Compared with the digital automatic gain controller 5 (9) of Fig. 5, the digital automatic gain controller 丨9〇0 has a lower circuit cost. Figure 20 is a block diagram of a digital automatic gain controller 2_ having a low sampling rate in accordance with the present invention. The envelope surface detecting module fan 2 includes a peak peak detecting module 20, 2, a bottom value detecting module 2〇M, a subtractor 2〇] = a peak peak detecting module 20〗 2 detects an amplified signal % The peak value of the p. Valley, value detection module 2 0] 4 reads the bottom value b of the amplified signal s 〇. Subtraction: The device 2〇16 subtracts the valley value B from the peak value P to obtain the envelope surface signal E. Analog to Digital Converter Fine 4 Converts the Analog Envelope to a Digital Envelope 0758-A32246TWF1 (20101028) 26 1337349 Patent Specification Revision No. 96120113 Revision Date: 99"2.15 Face = E'. Figure 2a shows the amplified signal s. , the first training diagram (four) ... face detection module hired and analog to digital converter read the digital envelope signal E generated by the a 唬 唬 〇 第 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The number of 2006: t-surface ^ #U E' is then sent to the digital control module 6. ^Bit control module 2 deletes the subtractor 2Q22, the gain controller

(4), product w 2〇26. The subtractor assists subtracting the packet = plane (four) E' from a reference voltage r to obtain the difference signal D. The gain controller hires to reduce the amplitude of the difference No. 2 D to the lower layer and to obtain the difference signal d. The product U 2026 integrates the difference signal D to obtain a digital gain signal μ. The figure = is shown in the reference voltage! The time corresponds to the difference D of the envelope surface letter ^ E of the claw map. Figure 21d shows the digital gain signal m generated by the difference D of the digital control module. Finally, the digit-to-analog conversion H is converted from the digital gain M to the analog gain signal M to amplify the input signal Si. Figure 22 is a block diagram of another digital auto-gain controller 2200 having a low sampling rate in accordance with the present invention. The digital automatic gain controller 22 is different from the digital automatic gain controller 2 of Fig. 20 only for the envelope detection fork group 2202. The envelope surface detecting module 22〇2 includes a rectifier 22丨2 and a low pass filter 2214. The rectifier 2212 first generates an absolute value signal I of the letter " The low pass filter 2214 then follows the absolute value ^, except for the high frequency (4) envelope surface signal.帛23a shows the display: after 乜唬S〇, the 23b shows the envelope surface signal E generated by the envelope surface detection module 22〇2 from the signal S〇 of the figure. The analog-to-digital converter 2204 then converts the analog envelope surface into a digital envelope signal & display 0758-A32246TWF1 (201 〇1 〇28) Patent edited by the 9612G1H revision date: 99.] 2.15 = 23c picture. The digital control module 2〇〇6 then generates a digital gain signal M based on the digital envelope surface number. Fig. 23d shows the difference signal D corresponding to the envelope surface signal E of the second figure, and Fig. 23e shows that the digital unit 2206 generates the digital gain signal M from the difference signal D of the 23d picture. After taking, the digital gain signal is converted by the digital to analog converter 2208 into an analog gain signal M to amplify the input signal S丨. Thus, the variable gain amplifier 1910 can amplify the input signal according to the gain signal M to obtain the output signal S0. The input signals of the analog to digital converters 2004 and 2204 are analog plane signals E ′ analog to the digital converters 2〇〇4 and 22〇4, which are lower than the analog to digital converter 5Q4. In order to ensure that the intensive read ~ dish L number ' must increase the analog to digital converter and 2 (4) resolution. This can be observed from the digital envelope signal of Figure 21b and Figure 。. However, when the sampling rate is increased, the signal resolution can be correspondingly reduced. Figure 24 is a block diagram of a digital automatic gain controller 24 (8) having a low signal analysis in accordance with the present invention. Number: Vertical automatic gain controller 2_ includes envelope surface, such as subtractor, ^ ratio to digital converter Na, Zhao control module 鸠, and digital to analog converter fiber. Packing (4) The nuclear group 24〇2 includes a rectifier, the rectifier helps calculate the absolute value of the input and the number S4 and outputs the envelope signal £; the upper 6S “the graph shows the envelope surface detection mode k surface^ to obtain the difference signal D. 0758-A32246TWF1 (20101028) 28 1337349 Patent Specification No. 9612011j Revised this revision date: 99.12.15 Since the envelope surface 5 Tiger E does not resemble the 22nd pass through a low-pass filter, the envelope surface L says E and the difference signal D The frequency oscillates at the frequency of the signal s. Therefore, a 7L analog-to-digital converter 24〇4 converts the analogy singer S into a bit data stream D at a high sampling frequency, wherein the high sampling frequency exceeds彳§ No. S0 twice the frequency. ▲. 25c shows the 1-bit data stream D corresponding to the difference L of the envelope surface signal of Figure 25b. Although the analog-to-digital converter μ(10) has a lower rate. However, because the bit data stream has only two values, the signal resolution of the 1-bit data stream D' is analogous to that of the 24th and 22nd figures to the digital envelope signals generated by the digital converters 240-4 and 2204. E, the resolution is as low as 帛23c and 2ib. Difference information D, then sent to the f-digit control module 2406, the digital control module 2406 includes a gain control of 2424, and an integrator 2426. The gain controller 2424 reduces the magnitude of the difference D to the lower layer and obtains the difference signal D. , integrating the difference signal D" to obtain the digital gain signal M. The figure (5) shows that the digital control module 2406 generates the digital gain signal M from the difference signal D" of the 21d picture. Finally, the digital gain signal Μ is converted into the analog gain signal M by the digital to analog converter 2 4 0 8 to amplify Input... On the variable gain amplifier side, according to the enhancement number m, put k唬S into the output signal s〇. ^, the invention provides a digital automatic consultation for amplifying the signal. The conventional digital automatic gain controller The signal must be processed with a high sampling frequency resolution. However, the present invention provides digital automatic:,: The controller can process the signal at a low sampling frequency or low signal resolution: 0758"A32246TWFI (20101028) 29 IS-37349 Date: 99.12.15 The first 120113 patent specification amends me = maintains the high quality of k. Since the low sampling frequency or low signal resolution simplifies the circuit structure and signal processing, it can improve circuit performance and reduce circuit construction. Figure 26 is a block diagram of a device 26〇〇 for demodulating a pre-groove address (A(jdress ιη Pregroove' ADIP) symbol according to the present invention. Device %(10) The wobble signal generating mode, the group 2602, the #考 wobble signal generator 2604, the waveform difference measuring module 26〇6, and the symbol type matching module %(10). The wobble apostrophe generating module 26G2 is first executed by the optical disc. The surface-reflected (four) signal generates a wobble signal. In the embodiment, the wobble signal generating chirp group 2602 is a push-pull processor (push_puU ρΓ〇·〇Γ), which subtracts the reflected signal strength of the track plant side from the track. The wobble signal is obtained by the reflected signal intensity on one side. When the wobble signal is generated, the reference wobble signal generator 2604 generates a reference wobble signal having the same frequency as the wobble signal and having the same phase as the wobble period of the wobbler. The second and second lines of Fig. 27' show the waveforms of the reference wobble signal and the wobble signal, respectively. In one embodiment, the reference wobble signal generator 26〇4 is a phase-locked loop that locks the positive of the wobble signal. The wobble period is generated to generate a wobble signal. The waveform difference measurement module 26〇6 then measures the difference between the wobble signal and the reference wobble signal to obtain a series difference measurement value. The difference is the phase difference. Since the _ difference measurement value is determined according to a certain wobble signal period of the wobble ,, a difference measurement value corresponds to the -ADiP bit. The 4 lines respectively show the phase difference and the corresponding difference measurement value. Since the phase of the reference wobble signal is 07^8-A32246TWFl (20101 〇28) 1337349 No. 96丨201 U is revised. This revision date: 99.] 2.15 = the phase of the positive phase wobble period of the wobble signal, so if the wobble positive phase wobble period, the phase difference is 〇, and if the wobble signal is in the -negative phase wobble period, the phase difference increases. ^ ^ The diagram is a waveform difference measurement module 2_ according to the waveform difference measurement module of the present invention, which includes a phase comparator 2802, r, ::: 8G4. The phase ^ compares the phase of the wobble signal and the reference wobble with respect to 11·28° 2 to obtain a phase difference signal. In one embodiment, phase two = 2 is X 〇 R Q 'the pair of wobble signals and the reference wobble letter " 运 transport to obtain a phase difference signal. Since the X0R gate only has the =: and the reference wobble signal are both high voltage or low, the output of the two potentials is output. In the case of "L唬, otherwise the phase of the low potential is output _#' The difference between the phase difference signal and the reference wobble signal. Counter = wobble signal period count phase difference signal reaches: private bit _ length to get the difference corresponding to the bit. The counter employs a clock having a frequency higher than the reference wobble signal to count the difference measurement. For example, the difference in the summer line value of the 27th line is based on the 16 times the gamma count, so the difference measurement is between. :Γ6= imitation π: after the divergence measurement is generated, the 'symbol type matching module 2608 compares the ADIP bit according to the difference between the measured values and the rate of each fine line = to determine the oscillation signal. Adip character = brother (four) is the symbol type according to the present invention

Block diagram. The symbol matching module bay includes collectors 29G2, M 075 8-A3 2246TWF1 (2010) 028) 1-537349 Patent Specification No. 120120113 Revision Date: 99.12.15 Array 2904, Maximum Possible Comparison Module 2906. Since each ADIP symbol contains 8 ADIP bits, and the arrangement of 8 ADIP bits determines which type of ADIP symbol it belongs to, the collector 2902 collects 8 consecutive differences for comparison. The ADIP bit is arranged. The correlator array 2904 includes a plurality of correlators, each correlator multiplying the positive and negative signs generated by the consecutive eight differential measurements and the possible ADIP symbol arrays of ADIP symbols to obtain correlation values, and The sum of the correlation values is obtained to obtain the probability that the ADIP bit corresponds to a certain arrangement. For example, the difference between the fourth row of Figure 27 is 14, 2, 2, 2, 0, 1, 5, U. Since the ADIP bit corresponding to the 0 symbol of the ADIP data is "1000001 1", the correlation values of the two are 14, 2, -1, -3, -2, 0, 15, and 11, and the sum is 32, indicating ADIP. The bit corresponds to the probability of the ADIP data 〇 symbol. The ADIP bit corresponding to the 1 symbol of the ADIP data is "10001 100", and the correlation value with the difference measurement value is 14, 2, -1, -3, 2, 0, -15, -11, and the sum is -16, indicating the probability that the ADIP bit corresponds to 1 symbol of the ADIP data. Similarly, the ADIP bit corresponding to the ADIP synchronization symbol is "1 Π 10000", and the correlation value with the difference measurement value is 14, 2, 1, 3, -2, 0, -15, -11, and the sum is -8, indicating the probability that the ADIP bit corresponds to the ADIP synchronization symbol. The maximum likelihood comparison module 2906 then compares the probability values that indicate the difference measurements to match the ADIP symbols to determine the ADIP symbols. The maximum possible comparison module 2906 includes three comparators 2922, 2924, 2926 and 3 and gates 2932, 2934, 2936. Comparators 2922, 2924, 2926 0758-A32246TWF1 (20101028) 32 1337349 No. 96120]] No. 3 patent specification Amendment of this amendment period: 99.12.15 Do not compare two of the three odds to determine which probability value is better than Big. Each gate 2932, 2934 ' 2936 then performs an AND operation on the comparison results output by the comparators 2922, 2924, 2926 to determine which one. The ADIP symbol has the largest probability value. For example, in Figure 27, the probability values of the ADIP data, data 1, and sync symbols are 32, -16, and -8, respectively, so the maximum probability value is 32 and the ADIP data 0 symbol is output. Figure 30 is a diagram 3000 of demodulating an ADIP symbol in accordance with the present invention. First, a wobble signal is generated in step 3002. Next, in step 3004, a reference wobble signal having the same frequency as the wobble signal and having the same phase as the wobble period of the wobble signal is generated. Next, in step 3006, the phase difference between the wobble signal and the 'reference wobble signal is measured to obtain a phase difference signal. The phase difference signal is then measured at step 3006 to obtain a series of differential measurements corresponding to the ADIP bits, respectively. Next, in step 3008, the sign of the ADIP bit corresponding to the ADIP symbol is respectively multiplied by the difference measurement value to obtain a series of correlation values. Next, a series of correlation values are added in step 3010 to obtain probability values corresponding to the respective ADIP symbols. Next, in step 3012, the probability value corresponding to each ADIP symbol is compared to output the ADIP symbol having the largest probability value. The method 3000 can be used not only for demodulating ADIP symbols in DVD+R and DVD+RW type discs, but also for HD-DVD type discs for demodulating ADIP symbols. According to the HD-DVD specification, each ADIP symbol consists of only one ADIP bit, which can be a normal phase wobble (NPW) or an Invert phase wobble (IPW). Therefore, because the ADIP symbol can only be 0758-A32246TWF1 (20101028) 7 7349 Revision Date: 99.12.15 Patent Specification No. 96112011 is modified to be a positive phase swing period or a negative phase swing period 'and thus the device 26 符 symbol The pattern matching module 26〇8 can be replaced by a clipper (s]icer) or a decision maker (decision maker) to generate ADIP symbols. Figure 31 is a block diagram of a device 31 for demodulating an ADIP symbol of an HD-DVD in accordance with the present invention. Except for the clipper 31〇8, the other handle sets of the device 3丨〇〇 are substantially the same as the device 2600 of Fig. 26. ^ Based on the same principle as the apparatus 2600 for demodulating ADIP symbols, this is a device 32 for demodulating pre-pits (pre_pit). The figure shows a block 32 device for demodulating pre-pit bits in accordance with the present invention. The device comprises a Hamming distance generating array M〇2 and a symbol type determining module 32〇4. First, the wobble signal with the pre-pit is clamped from the disc. Since the pre-pitted bit may appear in the 彳 frame frame or the 资料 frame frame, the first 由 位 位 位 预 预 预 预Even = pre-pits of the bin to form a pre-pit set. Mai Kao Figure 9 'Three pre-pits can be arranged as "] "" to form the pre-pits of the even data frame with the same character ^, arranged as "nG" to form the pre-pitch frame Engraved pits with the same symbol, arranged as "!〇1" to form pre-embossed, data 1 symbol, or arranged as "(10)" to form pre-pit data 〇 ^ °目 this if the pre-pit The bit ^ collection module collects the odd data frame and the inverted pit position S of the even-poor frame. The pre-pitted bit set should have six different types: the pre-pitted bit arrangement 'is the pre-array of the data frame respectively. The pit is the same as the 70 "111_", the pre-pit sync symbol _110" of the odd f box is the pre-pit data of the even frame i symbol "(8)_", 07^ B-A32246TWF1 (2010J 028) 34 13.37349 Amendment date: 99.12.15 Patent specification No. 961201丨3 Amends the pre-pit data of the original data frame to the symbol "〇〇〇1〇1", the pre-pit data of the even data frame The 0 symbol "100_", and the pre-pit data of the odd data frame 0 symbol "000100". The Hamming distance generation array 3202 measures the pre-pitted bit set and the six pre-pitted pits corresponding to the pre-pitted bit arrangement "] 11 〇 (10)", "0001 10", "1 〇 1_" Hamming distance between "_101", "1〇〇〇〇〇" and "000100". The Hamming distance generation array includes a plurality of Hamming distance generators 3212, 3214, 3222, 3U4, 3U2' 3234, each Hamming distance generator measuring a pre-pitted bit set corresponding to a pre-pitted symbol element The Hamming distance between the pre-pits of the pits. Since the Hamming distance indicates the number of bits of the same position of the two string bits but different values, the Hamming distance can properly reflect the probability that the pre-pit bit set corresponds to a certain pre-pit symbol. The symbol type decision module 3204 then finds the probability value having the smallest Hamming distance to determine the pre-pit symbol represented by the pre-pit set, thus demodulating the pre-pit symbol. As shown in FIG. 32, the Hamming distance generated by the Hamming distance generating array 32〇2 is respectively input into the symbol type determining module 32〇4, wherein the symbol type determining module 3204 includes a plurality of comparators 3216, 3218, 3226, 3236, 3238, 3228. The comparison module 3212 and the comparison module 3214 compare the pre-pit bits with the sync symbols "ln〇〇〇" and "〇〇〇11〇", respectively, and input the obtained Hamming distance to the comparator 32丨. 6. The comparator 3 21 6 compares the received Hamming distances, obtains the minimum Hamming distance therein and inputs it to the comparator 32-8. Comparator 3218 determines the minimum received 0758-A32246TWFl (2010l028) 35 H37349 Amendment date: 99, 12.15 No. 96120] The patent specification of No. 13 corrects whether the Hamming distance is less than a threshold value, and if the minimum Hamming distance received is For the threshold value, the symbol type determination module 32G4 determines the pre-pit bit system synchronization symbol. Similarly, the comparison module 3222 and the comparison module 3224 compare the pre-pit bits with the data 1 symbol "face (8)" and "_1G1", respectively, and input the obtained Hamming distance to the comparator 3226. The comparator 3226 compares the received Hamming distance' to obtain the minimum Hamming distance therein and inputs it to the comparator 3238. The comparison module 3232 and the comparison module 3234 compare the pre-groove i bits with the data symbols "1" and "(8)(8)", respectively, and input the obtained Hamming distance to the comparator 3236. Comparator 3236 compares the received Hamming distances to obtain the minimum Hamming distance and loses. σ 3238. The comparison state 3238 inputs the data 1 minimum Hamming distance input comparator 3228' comparator 3228 to determine whether the received data 1 minimum Hamming distance is less than - the threshold value, and the purely received data 1 minimum Hamming distance is less than the threshold value. The metamorphic mode determines the mode, the group 3204 determines the pre-pit, and the 7L system data 1. Moreover, the comparator 3238 inputs the data 〇 minimum Hamming distance into the comparison state 3228, and the comparator 3228 determines whether the received data 〇 minimum Hamming distance is less than a threshold value, and if the received data 0 minimum Hamming distance is less than the threshold value, then The symbol type discriminating module 32〇4 determines the pre-pitted bit element data 〇. The present invention provides a method of demodulating an ADIP symbol carried by a wobble signal and pre-groove a few symbols. The ADIP symbol is used for an optical disc format such as DVD+R or DVD+RW to record address information, and the pre-pit symbol is used for an optical disc format such as DVD-R or DVD_RW to record bit 0758-A32246TWFK20101028) 36 1337349 Revision date: 99,12.15 The patent specification No. 96112011 modifies this site. The ADIP, meta- or pre-pit bits are evaluated to match the probability of certain permutations by measuring the sum of the correlation values or the Hamming distance to obtain ADIP symbols or pre-pit symbols. Since the present invention is a probable way to evaluate the A D1P symbol or the pre-pit symbol, the conventional method of the present invention can tolerate a large noise of the wobble signal, thus Demodulation of the correctness of the ADIP symbol or pre-pit symbol. 厶匕Λ月匕0 Figures 33a and 33b show the number sAD or 仏 §bc taken from the blank and non-blank areas, respectively. The optical disc read head detects four reflected signals sA, Sb, Sc, and Sd, wherein %, %, and %, & respectively, reflect the reflection intensity on both sides of a track. Figure 34 is a block diagram of the apparatus 3400 for detecting a blank section of an optical disc by a wobble signal. The device 3400 includes a push-pull processor 3402, a low-pass filter 3404, and a blank detection module 3406. The push-pull processor 34〇2 is similar to the push-pull processor 132〇 of the figure, and generates a wobble signal B. The low-pass filter 3404 filters the high-frequency signal of the wobble signal B to obtain a wobble signal B2. The blank detection module 3406 generates a white number 5 according to the swing signal B2 to determine a blank section of the optical disc. The blank detection module 3406 includes an envelope surface detection module 3408 and a comparator 3410. The envelope surface detection module 3408 detects the envelope surface of the wobble signal B2 to obtain an envelope surface signal B3' as shown in Fig. 33c. Comparator 3410 compares envelope surface signal B3 with a threshold value to produce a blank signal B4, as shown in Figure 33d. The comparator 34]0 can be a slicer or a decision maker. Therefore, the blank signal B4 can indicate a blank section of the optical disc. 0758-A32246TWF1 (20101 〇28) 37 1337349 Revision date: 99.12.15 Patent specification No. 96120113 This is because the swing signal B1 is generated by the signals SAD and SBC, and the reflected signal strengths of different optical disc types are different. Get solved. Therefore, the same threshold value can be applied to the comparator 34 to discriminate the blank portion of the disc. Figure 35 is a flow chart of the method (%) of detecting a blank segment according to the present invention. The first step 35〇2 uses a push-pull processor to generate a wobble signal for the optical disc. Then, in the step, the high frequency noise of the wobble signal is filtered to generate a filtered wobble signal. Next, in step 35〇6, the envelope surface of the filtered wobble signal is detected to obtain an envelope surface signal. Finally, in step 3508, the envelope surface signal is compared to a threshold value to produce a blank signal, wherein the blank § § indicates a blank portion of the optical disc. The present invention has been described above by way of a preferred embodiment, and it is not intended to limit the invention. Any one skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention is defined by the scope of the patent application. [Simple diagram of the figure] The first picture shows the wobble signal without data; the first picture 1b and 1c show the signal sad&Sbc generated by the wobble signal with data; the id picture shows the lb picture and the The signal of the wobble signal obtained by subtracting the signal 'and the Sbc' from the graph 1; Fig. 2 is the block diagram of the conventional wobble signal detecting circuit for pre-groove absolute time; 〇758-A32246TWn(2〇i〇1028 38 1337349 Amendment date: 99.12.15 No. 20] Patent Specification No. 13 Amendment Figure 3 is a block diagram of a conventional wobble signal detection circuit for detecting pre-groove addresses; Figure 4 is a Block diagram of a conventional circuit for measuring the frequency of a wobble signal; Figure 5 is a block diagram of a digital automatic gain controller; Figure 6a is a wobble signal of a sync symbol with a pre-grooved address; Figure 6b and Figure 6C is a wobble signal with a pre-grooved address and a 1-symbol signal; and Figure 7 is a process for demodulating a conventional method of wobble signals with pre-grooved address information; Figure 8 shows the pre-pitted bits in the wobble signal containing two consecutive data; The information content of the four pre-pits can be represented by three pre-pits; and FIG. 10 is a diagram of the wobble signal detecting circuit according to the present invention; the melon n is a sampling according to the present invention. The partial block diagram of the wobble signal detecting circuit may be changed according to the frequency of the wobble signal; '12 is a partial block diagram of a wobble signal detecting circuit having a 1-bit analog-to-digital converter according to the present invention; , °. ▲13th block diagram of the apparatus for recognizing the disc format of the mobile carrier frequency according to the present invention; 14th is a block diagram of the oscillating money carrier frequency according to the present invention; Table 15a is shown in the adjustable Swing signal before filtering by bandpass filter 0758-A32246TWFI(20101028) 39 1-337349 Revision date: 99.12.15; Figure 15b shows the signal after the black, s, & The generated filter signal (5) shows the envelope surface of the signal after the data is obtained to obtain the envelope block diagram. FIG. 16 is a region method of the device for discriminating the optical disc format according to the present invention. Figure 18 is a block diagram of the wobble signal detecting circuit. Figure 19 is a block diagram of the digital automatic gain controller according to the present invention, which has a low take-up controller according to the present invention. ; J double m eye movement i 曰 second 丨 a picture shows the amplified signal; crying by = ^ 络 surface axis group and analog to digital conversion, 4 raw digital envelope signal; brother figure is shown in the reference voltage is 1 The difference signal corresponding to the envelope surface signal; ί , a θ 21d The figure shows the digital gain signal generated by the digital control mode; FIG. 22 is a block diagram of the dynamic gain controller with low sampling rate according to the present invention; the digital display shows the amplified signal from the 23a; 〇758-A32246TWF1( 201〇1〇28) 1337349 4 Revised edition of the patent specification No. 96丨20113" Amendment date: 99,12.15 Figure 23b shows the envelope surface signal generated by the envelope surface detection module; Analog-to-digital converter is a digital envelope signal obtained by the envelope surface transformation of the first diagram; , signal; Figure 23d shows the difference of the envelope surface signal corresponding to Figure 23c. Figure 23e shows the digital control module from the 23d a digital gain signal generated by the difference signal of the graph;

Figure 24 is a block diagram of a digital auto-increment controller with low signal resolution according to the present invention; Figure 25a shows the amplified signal; Figure 25b shows the signal from the 21st a-envelope detection module The generated envelope surface signal; Figure 25c shows a 1-bit data stream corresponding to the difference signal of the envelope surface signal of Figure 25b; and Figure 25d shows the digital gain signal generated by the digital control module from the difference signal of the 2nd map Figure 26 is a block diagram of an apparatus for demodulating a pre-groove address symbol in accordance with the present invention, and Figure 27 is a diagram showing a signal processing procedure for demodulating an ADIp symbol carried by a wobble signal in accordance with the present invention; Block diagram of the waveform difference measurement module according to the present invention; FIG. 9 is a block of the symbol type matching module according to the present invention 0758-A32246TWF1 (201〇1〇28) 1-337349 Revision date: 99.12 .15 Amendment to the patent specification No. 96120113

30 is a flow chart of a method for demodulating an ADIP symbol according to the present invention; FIG. 31 is a block diagram of an apparatus for demodulating an ADIP symbol of an HD-DVD according to the present invention; Block diagram of the device for demodulating the pre-pit bits; Figures 33a and 33b respectively show the signals taken from the blank and non-blank segments; Figure 33c shows the envelope surface detection module detecting the wobble The envelope surface of the signal to obtain the envelope surface signal; Figure 33d shows the comparator comparing the envelope surface signal with a threshold value to generate a blank signal; Figure 34; and Figure 35 is a method for detecting a blank segment according to the present invention. flow chart. [Main component symbol description] (Fig. 2) 202~ Bandpass tear wave 5 §. . 204 204~ analog to digital converter; 206~ pre-groove absolute time detector; 208~ phase-locked loop; Figure) 312~low-pass filter; β s Α 4 to digital converter; 0758-A32246TWF1 (20I01〇28) 13.37349 Revision date: 99.12.15 3 02~ bandpass filter; 308~ phase-locked loop;丨 201丨3 Patent Specification Revision 4 306~ Pre-groove Address Detector 304~ Analog to Digital Converter (Fig. 4) 402~Auto Gain Module; 4〇4~ Bandpass Filter; 4 〇6~high-pass filter; 410~pulse calculation module; 408~two-bit converter; (figure 5)

502 ~ envelope surface detection module; 506 ~ digital control module; 510 ~ analog variable gain amplification (Figure 10) 504 ~ analog to digital converter 5 0 8 ~ digital to analog converter; 1002, 1012 ~ Low pass filter; 1004, 1014~ high pass filter; 1006, 1 〇 16~ automatic gain controller; 1020~ subtractor; 1022~ anti-aliasing filter;

1024~high-pass filter; 1026~ analog to digital converter; 10 2 8~ pre-groove address detector; 1030~digit bandpass filter; 1032~ pre-groove absolute time detector 1034~ swing signal lock Phase loop; (Fig. 11) 1 102~anti-aliasing filter $; 丨丨G4~ high-pass chopper 1 1 06~ analog to digital converter; 1 Π 0~digit bandpass filter; 0758-A32246TWF1 (20101028) 43 TO 7 349 Patent Specification No. 96120113 This revision date is corrected: 99.12, 15 1112~ Pre-groove absolute time detector; 1114~ Swing signal phase-locked loop (12th figure) 1202~Anti-aliasing filter; 12G4~ High-pass filter 1206~1 bit analog to digital converter; 1210~digit bandpass filter; 1212~ pre-groove absolute time detector; 1214~ swing signal phase-locked loop; (Fig. 13) 1312, 322 ~ low pass filter; 1314, 1324 ~ high pass filter; 1316, 1326 ~ automatic gain controller; 1332 ~ anti-aliasing filter 1330 ~ subtractor; 1334 ~ DC part elimination module 1336 ~ two-bit conversion module; 1342~ adjustable bandpass filter; 1344~ Rate detection module; 1346~CD format recognition module; 13 20~ push-pull processor; 1304~ frequency detection and optical disc format recognition module; (Fig. 14)] 332~ anti-aliasing filter; 】 334 ~ DC part elimination mode level 1336 ~ two bit conversion module; 1342 ~ adjustable band pass filter; 1344 ~ frequency detection module; 1402 ~ envelope surface detection module; 1404 ~ maximum amplitude detection mode Group; 0758-A32246TWFl(2〇l〇i〇28) 44 96]201] Patent Specification No. 3 Amendment Date: 99.丨2.15 (Fig. 16) Anti-aliasing; wave filter, 1334~DC section Elimination module; 1336~two-bit conversion module; 1342~adjustable bandpass filter; 346~optical disc format recognition module; 1602~ envelope surface detection module; 1604~maximum amplitude detection module; (Fig. 8)) 1802, 1812~low-pass filter; 1804, 1814~high-pass filter; 1806, 1816~automatic gain controller; 1822~low-pass filter 1820~subtracter;]824~pre-groove Address detector 1832~ bandpass filter; (Fig. 19) 1902~ envelope surface detection module; 1906~digit control Module; 1910 ~ variable gain amplifier; (Fig. 20) 2002~ envelope surface detection module; 2 014~ valley value detection module; 2006~ digital control module; 2022~ subtractor; 2026~ integral (Fig. 22) 2202~ envelope surface detection module; 1834~ swing signal phase-locked loop; 1904~ analog to digital converter; 1908~digit to analog converter; 201 2~ spike detection module; 2004~ Analog to Digital Converter; 2008~Digital to Analog Converter; 2024~Gain Controller; 2212~Rectifier; 0758-A32246TWFH20101028) 45 T537349 Patent Specification No. 96112011 Revision of this Revision: 99.12.15 221 4~ Low pass filter; 2204~ analog to digital converter 2206~digital control module; 2208~digit to analog converter 2224~gain controller; 2222~subtractor; 2226~ integrator; (Fig. 24) 2402~ envelope Surface detection module; 2412~rectifier; 2404~one-bit analog to digital converter; 2406~digit control module; 2408~digit to analog converter 2424~gain controller; 2403~subtracter; 2426 Integrator; (Fig. 26) 2602~ wobble signal generation module; 2604~ reference wobble signal generator; 2606~ waveform difference measurement module; 2608~ symbol type matching module; (Fig. 28) 2802~phase Comparator; 2804~ counter; (Fig. 29) 2902~collector; 2904~ correlator array; 2912, 2914, 2916~correlator; 2906~maximum possible comparison module; 2922, 2924, 2926~ comparison 2932, 2934, 2936~AND gate; (Fig. 31) 0758-A32246TWF1 (20101028) 46 1337349 'The patent specification of No. 96120113 amends this revision date·· 99.12.15 鼍3 102~ wobble signal generation module; 3 104~ reference wobble signal generator; 3106~ waveform difference measurement module; . 3 108~ wearing clipper; • (Fig. 32) 3202~ Hamming distance generating array; 3204~ symbol type determining module; 3212, 3214, 3222, 3224, 3232, 3234~ comparison module; • 3216, 3218, 3226, 3236, 3238, 3228~ comparator; (Fig. 34) 3402~ push-pull processor; 3404~ low-pass filtering 3408~ envelope surface detection module; 34 10~ comparator.

0758-A32246TWF1 (20101028) 47

Claims (1)

1337349 Patent Specification No. 96120113 Amendment Date: 99.12.15 X. Patent Application Range: 1. A device for demodulating an Address In Pregroove (ADIP) symbol, where the pre-groove address The symbol is included in a wobble signal of the optical disc, and the pre-groove address symbol includes a plurality of pre-groove address bits arranged according to one of a plurality of arrangement patterns, the device comprising: a wobble signal generation The module captures a wobble signal generated by the optical disc; a reference wobble signal generator generates a reference wobble signal, the frequency and phase of the reference wobble signal and a positive wobble period of the wobble signal (Positive Wobble Cycle) has the same basic frequency and phase; ... a waveform difference measurement mode, group, and the connection to the wobble signal generation module and. Xuan Cang examines the swing k to generate II, measures the difference between the wobble signal and the reference wobble, to obtain a difference measurement value, wherein the equal value measurement value respectively corresponds to the pre-groove address bit And 7, the type of matching model buds two main children waveform difference measurement loss group, according to the waveform difference measurement value comparison of the pre-groove address bits, the probability of conforming to the arrangement pattern Pre-grooved address symbol. The demodulation pre-groove address character described in item 1 of the claim area, wherein the waveform difference measurement module comprises: a second test device, which is connected to the wobble signal generation module and the Refer to the swing 彳5❹", compare the phase of the county money and the phase to get a phase difference signal; and tie the "rabbit counter, it is difficult to the phase comparator, count the phase difference signal 〇^S~A32246TWFJ (2 〇j〇]〇2S) 48%%]20113 Patent Specification Amendment Revision Date: 99.丨2.1: ^t test swing signal per-swing signal period to achieve high dust heterogeneous heart "generate corresponding to The demodulation pre-groove address character i in the second pre-groove address bit is the same as the time-counter signal. Between the wobble signal and the frequency of the high voltage number in the wobble signal period, where the frequency of the clock signal is higher than the reference wobble cell: the patent demodulates the pre-groove described in item $1 The address of the address is set to where the pattern matching module includes: ^ $.. coupled to the waveform difference measurement Group, receiving pairs; s Yu Yuan pre-slotted material amount of material difference (four). Collect corresponding value points; (4), consumption to the collector, the difference measurement of the temple pre-grooving address bit The type of the arrangement produces = ί = to a plurality of correlation values, and the total corresponds to each of the permutations:::special value 'to obtain the probability of pre-engraving the #arrangement type; and several pairs of wishes Comparing the module, _ the correlator array, comparing the slot address symbols to the (4) sophomores of the arrangement type to determine the pre-groove address symbol. 5. If the patent application scope is 4 yuan The device, i let the lord, the jin L solution § week pre-grooved address character /, 宁 ^ off the state array to generate the respective types of the probability, and the maximum possible comparison module heart to arrange a plurality of comparators, respectively Pairwise comparison of the odds to produce an indication 0758-A32246TWFl(2UI0l028) 49 1337349 Amendment date: 99.12.15 No. 96120] No. 13 of the patent specification modifies a plurality of comparison results of the larger probability; and, - plural AND gate' performs AND operations on two of the comparison results Determining which of the pre-groove address symbol pairs should be arranged in the same manner. 6. The apparatus for demodulating a pre-groove address symbol as described in the scope of the patent application, wherein the reference wobble signal generator a phase locked loop (Phase Locked Loop), the phase locked loop locks and repeatedly outputs a positive swing period of the wobble signal to generate the reference wobble signal. 7. The demodulation pre-groove as described in the patent application. A device with a plurality of address points, wherein the wobble signal generating module is a push-pull processor (push-puilprocess), the push-pull processor is free from the optical disc - the obedience - the side reflection - the - The wobble signal is obtained by subtracting the intensity of the second reflected signal reflected by the other side of the track from the reflected signal strength. The device for demodulating a pre-groove address as described in the patent application page, wherein the format of the optical disc is HD_DVD, and the address symbol includes only a pre-groove address bit. The pre-groove address bit can be a normal phase wobble (NPW) or a negative phase wobble (ipw), and the symbol type matching module is a - clipper ( sUcer) 'The pre-groove address symbol is judged based on the single difference side value. X—9. The device for demodulating the pre-groove address symbol described in the patent specification (4), wherein the format of the optical disc is DVD+R or dvd+rw, the pre-groove address symbol Package + 8 pre-groove address bits, and these arrangement types include the same symbol (sync), data 〇 symbol, and data] symbol 0758-A32246TWFlf2〇l〇i〇28) 50 1337349 " The patent specification of S 96120113 amends this revision date: 99.]2.]5 Corresponding arrangement pattern. 】. A method for demodulating an Address In Pregroove (ADIP) symbol, wherein the pre-groove address symbol is included in a wobble number of a disc, 'the pre-groove address symbol The method includes a plurality of pre-groove address bits arranged according to one of a plurality of permutation patterns, the method comprising the steps of: generating a wobble signal from the optical disc; Generating a reference wobble signal, the frequency and phase of the reference wobble signal being the same as the fundamental wobble period of the wobble signal (Positive w〇bble c 八(九); measuring the difference between the wobble signal and the reference wobble signal To obtain a series of difference measurement values, wherein the difference measurement values respectively correspond to the pre-groove address bits; and ^ compare the pre-groove address bits according to the waveform difference measurement values. The method of arranging the pattern, and determining the pre-groove address symbol. η. The method of claim ,, wherein the wobble signal and the reference disparity measurement include the following Step: adjusting the phase difference between the pre-groove address signals and the phase between the reference wobble signals to obtain a count of the phase difference signal (4) reference swing money per-swing (four) :: medium time to reach a high voltage to generate a corresponding In the above (4); the difference value of the heart address level 70. 12, such as Shen # patent 粑 第 第 、 、 、 、 、 〇 〇 〇 〇 〇 〇 758-A32246TWFl (20101028) 51丄jj/349 Amendment date: 99.12.15 Patent specification No. 96120113 modifies the method of this symbol, wherein the comparison of the probabilities of the pre-forms includes the following steps: where the alignment type should be (4) slot address symbols Material difference measurement value; Benzene Μ ^ 差异 difference measurement value is respectively multiplied by the positive and negative signs generated by the squatting pattern bit positions to obtain a plurality of correlation values; the total corresponds to each (four) material The probability that the phase-difficulty side slot address symbols correspond to the arrangement type; and compares the probability values of the pre-_address ## corresponding to the (four) column pattern to determine the pre-groove address symbol. - 13. The comparison of the probability of the demodulation pre-groove address sub-segment described in item 12 of the patent application scope, wherein the pre-groove address bits of the 5 hai, etc., meet the probability of the arrangement pattern further comprises the following steps: The knives have a ratio of two to two to generate a plurality of comparison results indicating the greater probability; and an AND operation of the two of the comparison results to determine the orientation of the pre-grooved address symbol Which of the types is arranged., ^ ....Μ·If applying The method of demodulating the pre-groove address 衧兀 described in the page :, wherein the generation of the wobble signal includes the free-side reflection of the optical disc - the first reflected signal strength minus The track is reflected on the other side of the second reflected signal to obtain the wobble signal. 15. The method for demodulating a pre-groove address symbol according to the scope of the invention, wherein the format of the optical disc For dvd+r or DVD+RW '4 pre-grooved address symbols contain 8 pre-grooved address bits and ° Xuan et al. include the same symbol (sync), data 〇 symbol, 0758-A32246TWF1 (20101 〇28) ^7349 Revision date·· 99.12.15 The patent specification of No. 96120113 modifies the arrangement pattern of the 1 symbol. 16. A device for decoding a pre-pit symbol (pre_pit symb 〇 G, wherein the pre-pit symbol is included in a wobble signal of a disc, the pre-pit symbol comprising a plurality of permutations One of the plurality of pre-pits is arranged, and the device comprises: * a pre-pitted bit collection module, which is collected in a wobble signal, an odd frame, and an even data frame ( Even frame) of the pits 'to obtain a set of pre-pits, where the pre-pits only appear in the odd data frame or the even data frame -. The distance generating array is coupled to the pre-pitted bit collecting core group to measure the pre-pitted bit bits of the pre-pitted bit set and each of the arranged patterns of the Hamming foot macro ( Hamming (1) coffee (10)); and a symbol type decision module coupled to the Hamming distance generation array 'to find out the minimum Hamming distance in the arrangement pattern to determine the pre-pit symbol. , —Π. For the decoding of the pre-pits as described in item 6 of the patent application: Where the Hamming distance generation array comprises a plurality of Hamming distances, and each of the Hamming distance generators measures the pre-pitted bits of the pre-pitted bit set and the permutation patterns thereof The Hamming distance of one. For example, the decoding of the pre-pits of the patents in the May 17th patent, the two-dimensional set of the two-formed ones, including "ln〇〇〇", "0001] 0", F 000101 I, "ηΩΛηη Bamboo "" appears in 锶0"' and 00011〇", respectively, corresponding to the pre-pits of the bellows box, appearing in the odd data box 0758-Aj2246TWFI (2〇1〇i〇 28) 53 1337349 Amendment date: 99.12.15 No. 96120]! Amendment of the patent specification No. 3, pre-pitted sync symbol, pre-pit data appearing in the even data frame J symbol 7L, appearing in the odd data frame The pre-pit data] symbol, the pre-pit data appearing in the even data frame. The symbol 'and the pre-pit data appearing in the odd data frame 〇 symbol. 丨 9. If the patent application number 16 The apparatus for decoding pre-pit symbols according to the item, wherein the arrangement pattern comprises appearing in an even data frame The pre-pit is the same as the 歩# 7C, the j is seen in the odd data frame, the pre-pit is the same as the 歩 兀, the pre-pit data 1 symbol, and the pre-pit data 〇 symbol. The format of the decoded pre-pitted symbol symbol described in item 16 of the patent application scope is "the format of the medium 4 optical disc is 0758-A32246TWFH20I01028" 54 001337349 The revised version of the 96120113 revision date: 99.12.15 C/3 Factory · ω 〇海 3〇V ·] 铖34 a • L 3402 Factory. Μ04 ". ί B1 \ Β2 弇瘅一一 S J 3410 3406 I \ 3έ, 8 h & Tea Department 齑^铱荦3400 • L B4 B3 J 1337349 4 Patent Specification No. 96120113 Amendment Date: 99.12.15 VII. Designated representative map: (1) Representative representative map For: Figure 26. (2) A brief description of the component symbols of this representative figure: 2602~ wobble signal generation module; • 2604~ reference wobble signal generator; . 2606~ waveform difference measurement module; • 2608~ symbol type matching module. 8. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: 0758-A32246TWF1 (20101028)