TWI337345B - Apparatus and method for detecting a wobble carrier frequency of an optical disk - Google Patents

Description

1337345 Patent Specification No. 96112109 Revision Date: 99, 12.15 In particular, it is related to the invention of the optical disc machine. [Technical Field of the Invention] The present invention relates to the processing of a wobble signal of a disc [ Prior Art Data of _ and (3) are encoded and recorded on a spiral track on the surface of the sheet. The disc is burnable. The spiral = the track will be periodically sinusoidally shifted from the center of the track, (9) special (W〇bble), and the disc will be placed after the transfer. The information is on the track. The sine wave frequency of the wobble signal is called the wobble carrier frequency (wobble carrier fre-). The disc of the same format may have a carrier frequency: for example, the DVD_R or DVDram pendulum ==

The carrier frequency is 140.6 lcHZ, and the wobble signal ^ of DVD+R is 817.4 kHz. ~ Jiuzhou-T In order to extract the data on the disc, the disc player first uses the wobble signal detection circuit to measure the wobble signal on the optical disc. The design of the wobble signal intrusion circuit has a great influence on the performance of the disc player. The CD player uses a U read head to detect the (4) signal reflection intensity moving along the spiral track to read the wobble signal. The first laHd diagram is a schematic diagram of the signal detected by the read head of the optical disc drive. Figure 13 shows the wobble signal without data, so the waveform of the wobble signal is similar to a sine wave. When the data is recorded on a disc, the waveform of the oscillating signal is no longer similar to a sine wave. Usually, a read head is simultaneously corrected by 0758-A32245TWF1 (20101028). 6: 99.12.15 Patent Specification No. 96120] No. 09 Amendment: A light sensor is A, B 'C, D respectively senses the obstinacy The intensity 帛 lb diagram and 1C diagram of the reflected signal respectively show the port numbers Sad and Sbc generated by the wobble signal with data, wherein the photo sensor a and the D generator are the composite signal SAD, and the light sensing is performed. The producers of B and C are synthetic letters msBC. Since the phases of the composite signals Sad and Sbg are opposite, the information recorded on the optical disc can be obtained by adding the signals SAD & k to obtain another 'such as 帛 id map*, and the wobble signal carrier can use the signals Sad and SBC. Get it instead. Figure 2 shows the absolute time of the pre-groove (Absolute Time In

Pregr〇〇Ve, ATIP) The block of the conventional wobble signal debt measurement circuit 200 Figure Pre-groove! The time-to-time is a method of modulating the address information of the wobble signals of the CDs/CD_Rs. Since there is only a certain frequency range = wobble signal W. With a meaningful message, the wobble signal Wq is first filtered by the band pass wave state 202 to obtain a filtered wobble signal π!. The analog to digital conversion benefit 2〇4 then converts the analog wobble signal into a digital swing signal. The pre-groove absolute time detector 2〇6 then extracts the atIP information from the digital pendulum tH5 Γ), and the phase-locked loop 2〇8 locks the phase of the digital wobble signal D to obtain the same as the digital wobble signal D. One clock signal of frequency (not shown). Figure 3 is a block diagram of a conventional wobble signal detecting circuit 3 for detecting an Address In Pregroove (ADIP). The pre-groove address is a method of modulating the address of a wobble signal such as DVD+R or DVD+RW. Since only the wobble signal between a specific frequency range has a meaningful message, it is first corrected by the low pass filter 3 〖2 and band pass 〇 758-A32245TWFl (201 〇 1028) 7 '1337345 Date: 99.12 .15 The patent specification No. 120120109 modifies the filter 302, considers, oscillates the number, and finds the filtered swing signal.

Wi and W2. The analog-to-digital converters 3M and 3〇4 then convert the analog wobble signals W, and W2 into a digital wobble signal Di and a pre-groove address detector 306, which in turn extracts ADIP information from the digital wobble signal Di. The phase-locked loop 3〇8 locks the phase of the digital swing signal 以 to obtain the same fresh-clock signal (not shown) as the digital swing (4) D2. The band pass filter 202 of Fig. 2 and the band pass wave waver 3〇2 of Fig. 3 are analog type bands urn. Analog bandpass filters have a complex electrical structure that requires a large wafer area to accommodate its complex circuitry. The wafer area of analog-type passables typically occupies more than half the area in the wobble signal (4) 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_circuit requires a digital bandpass waver to avoid the upper-fourth figure is the conventional circuit of the 摆动j wobble signal frequency. The wobble signal of the block Id is first sent to an automatic gain module, — The automatic addition group 4G2 amplifies the electric power of the wobble signal to a harmonic wave suitable for the subsequent H 2 ^ & degree τ pass filter 4G4 and then amplifies the noise outside the desired frequency band. Then, when the high-pass chopper damage filters the DC portion of the wobble signal after W, it converts the binary signal into a 2-bit data stream. Then, the number of pulse waves in the smashing space is deleted to obtain the oscillating signal carrier frequency (secret & 0758-A32245TWF) (2010l028) δ 1337345. Correction date: 99.12. However, the carrier frequency of the wobble signal obtained by the pulse wave calculation module 41 may cause an error due to noise of the wobble signal of the first Id diagram. Although the noise of the wobble signal can be filtered by the filter 404, not all noise is filtered out. The residual noise of the wobble signal may interfere with the conversion process of the two-bit conversion state 408, thereby generating an erroneous two-bit data stream, and the pulse wave calculation is performed to calculate the wrong pulse wave number to obtain the wrong wobble signal carrier. frequency. In addition, the band pass the wave to cry 4〇4 to participate in (four) material New 3' electric material structure (four) and occupy the large (four) wafer surface - htr 1 , shell ... v view from Jules TS present form two have: in the track of the disc in. In order to take out the information from the oscillating signal, it must be enlarged to the hood (four) circumference before processing. Therefore, the Tiger circuit uses the automatic gain controller (10) tomatic gain to control the gain of the wheel's wobble signal.

In the month of the smashing number detection circuit, the feather A is changed. ^ Baizhi's automatic gain controller is analogous to '', the analog automatic gain control crying needs to have a large "& + ^ to reduce the automatic increase of the yoke of the cries and the need to have a large capacitance in the crystal two:; ==. Since the circuit with high capacitance is external to the wafer, the == path is usually set on the wafer. The phase is required to automatically adjust the phase of the gain and external power. The chip pin will increase the bit circuit implementation of the board to avoid the large-capacity dynamic gain controller. The number is automatically increased by 758-A32245TWFl (2〇l〇i〇2g) 9 No. 96120109 The patent specification is revised. The date of the amendment is: 99.12.15. The digital automatic gain controller 500 includes, compared to the variable booster (10) iablegainampU (four) training, analogy ^ "vertical converter 504, envelope surface detection module (ah - and (10) - _dule): > 〇 2, digital control mode Group 5〇6, digit to analog converter. Analog variable amplifier 〇51〇 according to the gain signal M, the input eight signal S| is amplified to amplify the signal Sj'. Analog to digital conversion $ 5 (10) then The signal Si' is converted to a digital signal s. The envelope surface then detects the digital signal S. The envelope surface is then followed by the digital control module 50^ according to the envelope surface E--gain signal M, and the digital to analog converter 508 The digital gain signal is converted into an analog gain signal M, and the amplification process of the variable-amplifier amplifier is described by the L analogy. Therefore, the signal gain of the digital automatic gain controller 500 is controlled by the digital control module. 6 is determined in digital mode, so there is no need for a large capacitance of the analog automatic gain controller. Since the input signal S contains high frequency noise caused by data or write pulse, the frequency of the amplified signal S, and the input signal S1 Frequency In order to comply with the Nyquist sampling theorem, the analog to digital converter 5〇4 must convert the signal Si to a digital signal S〇 at a sampling frequency higher than twice the signal S, 'the highest frequency. In addition, the envelope surface signal E The resolution must be sufficient so that the digital control module 50 can adjust the gain signal 依据 according to the envelope surface signal E. Therefore, the analog-to-digital converter 504 must generate the digital signal S 以 with high signal resolution. The signals So, Ε, Μ The high sampling rate and the resolution make the analogy to the digital converter 504 'envelope surface detection module 502, the digital control module 506, and the digital to analog converter 5〇8 0758-A32245TWFl (20101028) 1337345 the first 120109 No. Patent Specification Revision Date: 99, 12.15 The signal processing process and circuit structure are complicated, which greatly increases the hardware cost of the digital automatic gain controller 500. Therefore, it is required to have a simple digital signal processing process. Gain controller. 'When writing data to a disc, there are different ways to address the disc. If the disc is DVD+R or DVD+RW, it will be borrowed. " Address In Pregroove (ADIP) to record the address of the disc area of the disc. If the disc is in DVD_R or dvd_rw type, it is pre-pitted by the land (Land Pre_pit) ) to record the address of the track area of the disc. Therefore, when the CD player writes data to the disc, it needs to demodulate the pre-groove address or decode the pre-pit. 'Pre-groove address system Modulated by the type of the wobble signal and recorded on the optical disc. According to the specifications of DVD+R and DVD+RW, each of the optical discs includes 93 wobble signal periods, of which 8 wobble signals are weekly*monthly Information used to store the pre-groove address. The eight wobble signals can be positive or negative, and the eight wobble periods are positive and negative = different ^ means no symbol (symbQl). The pre-groove address symbol 2' is the same symbol (MO, data 〇 symbol, and (4) is the sway signal 6 with the pre-groove address of the same symbol.] (4) U Tiger 610 contains 8 The wobble cycle, including * cycle (4NW) and 4 positive wobble adjustments ^ change A - 〗) If the negative wobble cycle is transferred to the horse ADIP bit 兀 1, and the positive and red positive wobble cycles are converted to ADIP bits 〇 Then, the wobble signal 610 can be a string of data with a pre-grooved address 〇 758'A32245TWF1 (201〇] 〇 28) Patent specification of No. 1212〇1ϋ9 Revision date: 99.12,15 And the swing signal 620, 630 of the beech material. The 8-port wobble period of the wobble signal 620 includes one negative wobble period, five positive wobble periods, and two negative wobble periods in sequence, so that the wobble signal 62 can be in a series of 7L sequences "1〇〇〇〇〇n "To represent. Similarly, the wobble signal 63 〇 7 eight wobble cycles, including a negative wobble cycle, three positive wobble cycles, two negative wobble cycles, and two positive wobble cycles, so that the wobble signal 63 can be one. The string ADIP bit sequence "10001100" is represented. Figure 7 is a diagram of a conventional method of demodulating a wobble signal with pre-grooved address information. The demodulated wobble signal is shown in the second = of Fig. 7. A reference wobble signal having the same fundamental frequency and phase as the positive wobble period of the wobbled wobble signal is shown in the first row of Fig. 7. The phase difference between the cycled wobble signal and the reference wobble signal is measured and shouted out of the third row of Fig. 7. Since the reference wobble signal indicates the phase of the positive wobble period', if there is a large phase difference in the phase difference signal, it means that the demodulated wobble signal is in the negative wobble period. The phase difference signal on line 3 can be converted to the Amp bit 7L value of one of the 4th lines by the slicer (slicer). The series of ADIP bits ^ are directly compared with the alignment of the ADip symbol 7L, the data symbol, and the data element. Since the bit string in the figure is "〇_]", which coincides with the data symbol, the wobble signal of the second line is demodulated into data symbols. Although the conventional technique of Fig. 7 is simple, the wobble signal sometimes has a noise "can affect the generation of the phase difference signal. If the erroneous phase difference signal is obtained due to noise, the clipper will generate an erroneous ADIP bit based on the erroneous phase difference signal. At this time, the wrong AD]p ^ string 0758-A32245TWFl(2010l028) 1337345 Revision date: 99.12.15 The patent specification of the %丨20丨09 is amended to correspond to the ADIP symbol. The value cannot be solved. Call up the ADip symbol. Therefore, there is a need for a method of demodulating AD1P symbol values with higher noise tolerance. The disc of the DVD R or DVD-RW format is based on a pre-pit (Pre-Pit) to record the address of the track area of the disc. According to the specifications of DVD-RW, each error correction block (e_correction code b丨ock) contains 16 data sections (sect〇r), and each bedding section includes 26 data frames. <526 data sections are divided into odd data frames and even data frames, each data frame containing 8 wobble cycles. Each of the two data frames contains 3 pre-pit bits to store the address information. Figure 8 shows the pre-pits contained in the wobble signal 8A of the two consecutive data frames 802 and 812, wherein the data frame 802 is an odd data frame and the data frame 8ι2 is an even data frame. The three pre-pits of the data frame 8〇2 and 812 may respectively appear in the first three wobble signal periods 804, 806, 808 of the odd data frame 802 and the first three wobbles of the even data frame 8 Letter \ Tiger cycle 814, 816, 818. ° ~ Three pre-pits with two consecutive data blocks can represent even sync, odd sync, data, or data.帛9 mesh shows the information content of the four pre-pit symbols that can be represented by the three pre-pit bits. If the pre-pitted symbol indicates the synchronization information located in the even data frame, the three pre-pits 2 are 11". If the pre-pit symbol represents the synchronization information in the odd data frame, the three pre-pit bits are arranged as "110". If the pre-pit is 0758-A32245TWF1(201〇]〇28) Correction date: 99.12.15 The 9th _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1 〇]". If ", 1^0 pit symbol ^ yuan indicates data 〇, then the three pre-pits are arranged as a moving signal week with a pendulum pit and a L 3 spike pulse. However, when the pre-groove = 〇 'the top of the wobble signal period with the pre-pit bits is not Γ °, therefore, the spurs of the 1 contiguous data frame can be used to determine the pre-pits. Bit "^, then determine the value of the pre-pitted symbol based on the pre-groove number of π. 0 However, the above-mentioned square 4 which determines the pre-pit bit value may cause 骂 when the wobble signal has noise. A tongue's one causes a serious mistake. The wrong pre-pit is of course a false pre-pit value. Therefore, a pre-pit is required to have a higher noise tolerance. The method of the value. > In addition, the conventional detection of the blank area of the optical disk drive is based on the transient interval of the binary RF signal (t_ient (4). The RF signal is generated by the optical pickup. Then use the high-pass filter to remove low-frequency noise from the RF signal before the binary (bhJize) RF signal. Then, by using a clipper (sllcer), the RF signal is binarized according to a reference threshold value. Since the amplitudes of the RF signals of different disc types are also different, it is impossible to binarize different discs by the same-reference threshold value. The radio frequency signal of the chip type. Therefore, the optical disc drive requires a method for detecting the blank area of different radio frequency signal amplitudes. [Invention] In view of the above, the present invention aims to provide a detection optical disc 0758- A32245TWF1 (20101028) 14 1337345 Amendment date: 99.12.15 Patent specification No. 96120109 modifies this device. The device for oscillating signal carrier (4) is used to solve the problem of the existence of the technology. - two-bit conversion mode '" can. Zhou Pingtong filter, and a frequency detection module. The DC ^ ^ ^ 杈 group removes a first - swing signal (w〇bMe 5 丨卯屮 straight 卩乂 obtaining a first wobble signal. The two-bit conversion module converts the first wobble signal into a two-bit data stream. The tunable band pass filter=filters one of the tunable frequency bands of the two-bit data stream Fan The other is divided into φ to obtain a filtered signal, wherein the center frequency of the adjustable frequency band is gradually adjusted according to the frequency selection signal. The frequency detecting module determines the maximum amplitude of the filtered signal, and finds the filtering The post signal produces a center frequency of the tunable frequency band of the maximum amplitude, wherein the wobble signal carrier frequency of the optical disc is the center frequency of the δ tunable frequency band range that causes the filtered signal to produce the maximum amplitude. A device for recognizing the format of an optical disc, the device comprising a DC-blocking module, a two-bit conversion module, an adjustable bandpass filter, and an optical disc format recognition module. The DC section eliminating module removes a DC portion of a first wobble signal to obtain a second wobble signal. The two-bit conversion module converts the second wobble signal into a two-bit data stream. The tunable bandpass filter filters out components outside the tunable frequency band of the binary data stream to obtain a filtered signal, wherein a plurality of candidate optical disk format wobble signal carrier frequencies are successively designated as the The center frequency of the tuning band range. The optical disc format recognition module determines the maximum amplitude of the filtered signal, and finds a wobble signal carrier frequency that causes the filtered signal to generate the maximum amplitude! 5 0758-A32245TWF1 (20101028) 1337345 Revision date·· 99.12.15 The patent specification No. 96丨20109 modifies the (4) optical disc format corresponding to the vehicle. The format of the (4) optical disc is such that the filtered signal produces the maximum amplitude of the candidate optical disc format. The present invention further provides a method for (4) measuring the carrier frequency of the wobble signal of the optical disc #. First, a DC portion of a first wobble signal is removed to obtain a second wobble signal. Then, the second wobble signal is converted into a 2-bit data stream. Then, the components outside the adjustable frequency band of the binary data stream are filtered to obtain a filtered signal, wherein: the center frequency of the adjustable frequency band is gradually adjusted according to a frequency selection signal. The maximum amplitude of the filtered signal is then determined. Finally, find out which of the tunable frequency bands that cause the filtered signal to produce the maximum amplitude: frequency ^. The carrier frequency of the wobble signal of the optical disc is the center frequency of the adjustable frequency band range in which the filtered k唬 produces the maximum amplitude. The above and other objects, features, and advantages of the present invention will become more apparent and understood by the appended claims appended claims According to the invention, the sway signal debt measurement circuit surface = map: the optical disc read head detects the reflection from the optical disc to obtain the signals SA, SR, Sr·, S, and the signals sA and sB, The signal sc == indicates that the RF signal reflected from different sides of the track of the optical disc is strong. V: A and SD are added to obtain the signal s_, and the signals SB and C are added to obtain the signal W. Since the signal 'and S(10) contain the shot 758 -A32245TWF1(201〇i〇28) 16 1337345 Revision date·· 99.12.15 The 96th edition of the patent specification No. 20丨09 corrects the low frequency noise caused by the high frequency noise and servo signal caused by the frequency signal, so The low-pass filters 1 002 and 10 ] 2 and the high-pass filters 〇〇 4 and 10 14 filter the high-frequency and low-frequency noise from the signals Sad S and Sbc , , and finally obtain the signals SaD2 and SBC 2 .

The two automatic gain controllers 1006 and 1016 then amplify Saw and SBC2 to appropriate amplitudes to obtain hearts (1) and Sbc3, respectively. Subtractor 〇 2 〇 Next, the signal SAD3 is subtracted from SBC3 to obtain a wobble signal Wg. The closer the signal is to the SBC3 amplitude, the less RF noise remains in the wobble signal w〇. In order to reduce the distortion of the wobble signal WG, the wobble signal w〇 is filtered by an anti-aliasing fouter l022 to obtain a wobble signal. When the wobble signal W1 is passed through a high-pass filter 1〇24 to obtain the wobble signal w2, the analog-to-digital converter converts the analog wobble signal w2 into a digital wobble signal ^. " digital swing signal D, with pre-groove absolute time (Abs〇iute

In Pregroove, ATIp) data is modulated to a range of frequencies. The bit is taken out of the pre-groove absolute time data, the digital bandpass filter is digitally pendulum iHf number D] domain pure (four) pure number & outside components, in order to get the turtle position swing money. _ = = 斜 料 2 Take out the pre-groove absolute time number PLL 1034 then lock the digital oscillating H = phase (4) to produce a signal with a digital sway (four) ^, (not shown). In addition, the pre-grooved address (two two

Preg_e, ADIP) (4) _ self-digit pendulum = pre-grooved address information. A operation 0758-A32245TWF1 (20101 〇28) 17 1337345 Patent specification No. 96120109 This revision date is 99J2.15, since the analog to digital converter 1〇26_ is converted to the digital swing signal α by the swing signal %, The pass chopper 1030 can multiply the digital wobble signal by the digital side to generate the digital wobble signal D2. Compared with (4) than the filtering process, the digital filtering process has a simple and smooth signal processing process. The ^ string sample of the digital signal is treated as a variable of the chopping function to sample the filtered signal. In contrast, a wave-like wave requires a complicated circuit meter and contains circuit components such as resistors and capacitors to complete the filtering. In addition, the analogy requires a large amount of current to drive the (four) wave circuit, while the large current consumes a large amount of power. Therefore, compared to the conventional wobble signal detection, the wobble signal detection circuit including the digital band pass chopper has a simple circuit structure, low circuit cost, and low power consumption. Figure II is a partial block diagram of the wobble signal detecting circuit 1100 in accordance with the frequency of the wobble signal in accordance with the present invention. The CD player can read data from discs of different formats. Since the frequency of the wobble signal of different formats of optical discs is also different, if the analog-to-digital conversion is choppy, the sampling rate is analogous to the swing (four)% is the digit ^signal D1', then the bandpass filter (10) and other filters will not The central frequency macro will be changed according to the swing ## carrier frequency; Similarly, the analog to digital converter nG6 samples the analog age number w2 based on the drive (4) (4) of the clock signal having the same frequency as the analog swing signal w2. Therefore, the analog to digital converter]] 〇6 sampling rate can be changed as the frequency of the wobble signal changes. In the embodiment, the analog signal to the digital converter is clocked by the phase lock (1) 4 0758-A32245TWFK2010I028) 1337345 J The patent specification of the %]2 revision is correct. The date is: 99. 5 j • produce. In another embodiment, since the optical disc rotates at a fixed angular velocity, the wobble signal frequency can be estimated based on the address information of the analog wobble signal W2, and the sampling frequency analogized to the digital converter 1106 can be related to the address information. Adjustment. Figure 2 is a partial block diagram of the wobble signal detecting circuit 12 of the bit analog to digital converter according to the present invention. ^To ensure that the filtered wobble signal D2 has good quality, analog to digital The converter 1206 samples the wobble signal W2 at a high sampling rate. In order to simplify the filtering process of the digital band pass filter state 1210, the resolution of the wobble signal h input to the digital band pass filter 12 is reduced. In one embodiment, the analog to digital conversion state 1206 is a 1-bit analog to digital converter, a decision maker, or a comparator to convert the wobble signal into a wobble signal of a one-bit data stream. D]. If the analog to digital converter 1206 is a 1-bit analog to digital converter, the sampling rate must exceed 8 times the carrier frequency of the oscillating signal. • The present invention provides a wobble signal sensing circuit having a digital band pass filter. Unlike the analog bandpass filter, the digital bandpass filter does not require a complicated circuit structure, so (4) a small circuit area and requires a small driving current, thereby reducing the power consumption and wafer area of the wobble signal detecting circuit. . Figure 13 is a block diagram of an apparatus 1300 for detecting a wobble signal carrier frequency and identifying an optical disc format in accordance with the present invention. The device 13 includes a push-pull processor (push_pul丨pr〇cess〇r) n2 and a frequency detection and optical disc format recognition module 1304. The push-pull processor 132 generates a sway signal as shown in the patent specification No. 0758-A32245TWF1 (201 〇1 〇28) 19 / No. 96120109. The correction date is 99.12.15 】d diagram of the wobble signal, and the frequency is 3〇4 Detecting pendulum* and 7^ disc format recognition module identification disc disc ^^r=w°bbl coffee (10) and taking a different method than the familiar mine detection and optical disc format identification module 1304 - The new circuit structure and operation mode of the road 4〇0 to detect electricity: frequency and identify the disc format. The residual miscellaneous miscellaneous in the wobble signal generated by the new H-Draw processor 320 of the present invention does not affect the frequency of the oscillating signal carrier frequency of the oscillating signal carrier frequency 1304. The signal strength and the 'signal, and V, as shown in Fig. 1b and the first to generate the Γ Λ S S 1320, then process the signal, and the suffix S of .. θ. Push-pull processor 1320 includes low pass filters 1312 and 1322, ancient, s, full 增益 gain controllers 316 and 1376^ and ; ^: 1314 and 1324, automatic 1312 n no? subtractive state 1 Μ 0. Low-pass filter pass, two: signal from the signal, and help the coffee from the money U two connected two (four) gain controller] 316 and (10) will be ;; :: and SBC amplified to the same level 'and the subtractor measured After the signal is removed, the signal is subtracted to obtain the signal s. The frequency detection and optical disc format recognition module (10) then follows the wobble signal carrier frequency of the tablet. Since the different formats 'first discs have different wobble signals carrying 'carrier frequency', then 〇 758-A32245TWFl(20101028) 20 1337345 Revision date: 99.12.15 Patent specification 96112109 modifies the film format recognition module 1304 includes an anti-aliasing filter (ami_alias filter) 1332 'DC partial elimination module 1 334, two-bit conversion module】 336, an adjustable bandpass filter 1342, a frequency detection module 344, and an optical disc format recognition Module 1346. The frequency detection and optical disc format recognition module 1304 will be further described with reference to Figures 4 to 16. Figure 14 is a block diagram of an apparatus 1400 for detecting the carrier frequency of a wobble signal in accordance with the present invention. Device 14〇〇 is frequency detection and optical disc format identification, 'group 1304 sub-module, including anti-aliasing chopper 1332, DC/xiao division board group 1334, two-bit conversion mode, group 1336, adjustable band Pass filter B42, and frequency detection module 344. The anti-aliasing filter 1332 limits the bandwidth of the signal S1 to obtain a letter conforming to the Shamion-Nyquist sampling theorem. In the embodiment, the distortion filter 1332 is a low-pass filter W^^No. S2 is a one-bit conversion module. η% is analog-to-digital conversion ^month] The DC component of L5 tiger S2 is first removed by DC cancellation module 1334 to ^虎 S3. In the embodiment, DC cancellation module (3) 4 is a ^, 疋轺换The 杈 group 1336 then converts the analog wobble signal S 3 to two bits, * q — , only ten L S4. In a consistent embodiment, the two-bit conversion module 1336 is a comparator. Adjustable band pass filtering The n-occupied 1342 interface filters the two-bit data stream according to an adjustable frequency band. ^, y 41 ^ ^ ^ 5 The center frequency of the adjustable frequency band range can be adjusted according to a frequency selection signal. π _ 1^9 Α Figure 153 is presented in the adjustable bandpass filter 1342. The pendulum action number ^. 唬S3. The frequency selection signal can indicate the adjustable band n42Mj, v the frequency range, so that the adjustable bandpass filter 1342 Sequentially filtering the binary data stream with multiple pre-J items. s4, 0758-A32245TWFl(20101028) 21 No. 9612G1G9 The revised book revision date: 99.12.15 The collection of the surrounding and the swing signal carrier frequency: dry surround phase. For example, the adjustable band pass _ (5) the operating band range is over two bits Data stream S4, and the pre-medium only =, the heart frequency is fsl~fs7 respectively. The binary data stream S4 = the component of the adjustable band range is passed by the adjustable band pass filter 1342 = raw - filtered 'post signal S5. An example of the signal s5 is shown in the fifth section 】5b =1 in the 7 predetermined frequency band ranges (4): the bit data stream %, the waveform of the Z domain S5 has 7 different segments, and each _ segment corresponds to 4 predetermined One of the frequency band ranges. The frequency detection group 1344 then determines "the wobble signal carrier frequency of the disc based on the filtered signal s5. The frequency detection module 344 includes a 匕, a 'each surface detection module 14G2 and a maximum amplitude detection module 1'. The envelope surface detecting module 1402 detects the envelope surface of the signal S5 to obtain an envelope surface signal S6, as shown in Fig. 15c. The envelope surface signal of Fig. 5c includes seven different amplitudes hi~h7, respectively corresponding to a different predetermined frequency band range of the tunable bandpass filter 1342. Since the envelope surface signal S6 is the envelope surface of the transition = L 5 tiger, the amplitude response signal of the envelope surface signal % & the signal energy filtered by the tunable bandpass filter] 342. The larger the amplitude of the envelope signal %, the stronger the intensity of the filtered signal S5, and the signal S3, the over-adjustable bandpass filter! 342 The more components of the predetermined frequency π range selected by the frequency selection signal, the center rate of the selected predetermined frequency band, 3⁄4, close to the wobble signal carrier frequency. Therefore, the wobble signal carrier frequency of the optical disc can be estimated as the center frequency of the predetermined frequency band corresponding to the peripheral frequency range of the envelope surface signal %0758-A32245TWF1 (20101028) 22 1337345 Amendment date: 99.12.15 The patent specification No. 96120109 amends this rate. Referring to Figures 15b and 15c, the envelope amplitude signal ^ has the largest amplitude as h4, and the region corresponds to the tunable bandpass filter, and the center frequency of the predetermined band of the 1342 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 π(8) for discriminating an optical disc format in accordance with the present invention. The device 1600 is a frequency module and a disc format recognition module. The mode and composition of the device operation and the device are different from each other in different formats of optical discs with different wobble signal carrier frequencies. When the wobble signal carrier frequency is determined, the format of the optical disc can be recognized. Therefore, the devices 1600 and 1400 can share most of the modules. The device _ includes an anti-aliasing chopper 1332, a DC cancellation module 1334, a two-bit conversion mode, a group 1336, an adjustable band pass wave device 1342, and an optical disc format recognition module 1344. The optical disc format recognition module 1344 includes an enveloping surface detecting module 1602 and a maximum amplitude detecting module 604. In addition to the frequency selective signal of the bandpass filter (10), the device 16 is similar to the included module of the device 1400. The disc format includes DVD+R, DVD R, DVD Ram, DVD-RW, DVD+RW, and the wobble signal carrier corresponding to the candidate disc format is sequentially deleted as the tunable band pass filter 1342 of FIG. Filter the center frequency of the band. The tunable bandpass filter 13 42 then passes the m data stream ~ according to the passband to obtain the post-call signal S5. In addition, the optical disc format recognition module 1346 detects the envelope surface of the s5 with the envelope surface detection module 602 to obtain the envelope surface signal & and selects the module 1604 with the maximum amplitude to find the maximum envelope signal ~ Amplitude. Then, 0758-A32245TWFl(201〇l〇28) 23 丄w/m:) 丄w/m:) Patent Specification No. 96120109 Amendment Date: 99.12.15 What is the disc format recognition module 1346? The maximum click ' of the envelope envelope signal S6'. The formula corresponds to — the towel field, and the disc format is recognized. And (1) 7Πν'Λ is a method for detecting the optical disc < square of the swing frequency according to the present invention. In step 7〇2, the first narration of the disc is inferred, and the child is processed to produce the younger brother. In the DC portion of the signal in step 17〇4, to obtain the fourth (fourth) wobble, the second wobble signal is converted into a 3:^: tiger. In step 1706, the 'door-bit 70' dithers. In step 1708, by an adjustable frequency band range _, after signal, ~...: Becco stream to obtain - filter - 忒 adjustable band range of the light - frequency selection signal, the sheep is painfully ordered, a From the Π王王者's 'Step 17】, decide the maximum magnitude of the money signal. Then, in step (7), the value of the filtered signal to the library is determined by the attack value of 1Iw degree. If it is not in step one; the h is the first disc format, "in step 7 = the output is greatly filtered, the heart frequency is the swing frequency is positive frequency can be identified η 士 u 戟 戟 戟 戟frequency. If the first disc format is recognized in step ,14, the disc format corresponding to the filtered signal is determined in step (7)6. ν田 provides a method for detecting the dragon's letter (four) wave fresh and identifying the aperture format. The noise in the wobble signal is not =:::= signal carrier frequency. Therefore, the present invention provides = = a simpler circuit structure and occupies a smaller wafer = this can reduce the production cost of the circuit. Port No. 8 is a block diagram of the wobble signal detecting circuit l8〇o. Since 〇758-A32245TWFI(201〇l〇28) 24 1337345 Revision date: 99.12.15 The patent specification of %]20丨09 amifies that the signals sAD0 and Sbco contain high frequency noise and servo signals caused by RF signals. Low-frequency noise, so low-pass filters 〖8〇2 and 1812 and high-pass filters 1804 and 18]4 from the signal SAD0& SBCG filter high frequency and low frequency noise, and finally get the signals SaD2 and Sbc2. The two automatic gain controllers 1806 and 8 then amplify sAD2 and Sbc2 to the same amplitude to obtain sAD3 and sBC3. Subtractor I 820 then subtracts Sb(:3 from signal SADS to obtain wobble signal Wg. The closer signal (1) is to the amplitude, the less RF noise remains in wobble signal w〇. When wobble signal wG passes through low pass filter After the 1822 obtains the wobble signal %, the pre-groove address (ADIP) detector 1824 is extracted by the wobble signal Wi, and the groove address information is obtained. When the wobble signal Wq passes through the band pass filter 1832 to pay the wobble signal W2. The phase bcked loop (PLL) 1834 generates a clock signal (not shown) according to the wobble signal W2. Fig. 19 is a block diagram of the digital automatic gain controller 19A according to the present invention. The automatic gain controller includes an envelope surface detection module 1902, an analog to digital converter 19〇4, a digital control module 19, a digital to analog converter! _, and a variable gain amplifier _ amPnfier 1910. The analog variable gain amplifier i9i〇 amplifies the input signal S丨 according to the gain signal 得到 to obtain the amplified signal §. . The input signal & can be the signal 8_ or the signal of Figure 18, and the output signal §. It can be the signal SaD3 or Sb of Figure 18. . The envelope surface detection module simply detects the amplified signal S. Envelope surface E. Next, the analog to digital converter converts the analog envelope signal E into a digital envelope signal £. From 075S-A32245TWFl (201〇J〇28) 25 1337345 Revision date: 99.12.15 Patent specification No. 96120109 modifies the signal s that does not resemble amplification on the envelope surface signal E. Generally, there is a large high frequency noise, so the analog to digital converter 1904 does not need to sample the envelope signal e at a high sampling frequency as in the case of Fig. 5 to digital conversion to 504. The digital control module 1906 then determines a gain signal 依据 for amplifying the input signal S1 based on the envelope surface signal E. When the digital-to-analog converter 1908 converts the digital gain signal M into an analog gain signal m, the variable gain amplifier 910 amplifies the input signal 唬S!' according to the gain signal M to obtain an output signal s〇. The low sampling rate of the analog to digital converter reduces the sampling rate of the envelope signal E and the gain signal M, thus simplifying the signal processing and circuit complexity of the analog to digital converter 19〇4. The digital automatic gain controller 1900 has a lower circuit cost than the digital automatic gain controller 5A of FIG. Figure 20 is a block diagram of a digital automatic gain controller 2000 having a low sampling rate in accordance with the present invention. The envelope surface detecting module 2〇〇2 includes a peak peak detecting module 2012, a bottom value detecting module 2014, and a subtractor 2〇16. The spike detection module 2〇12 detects the peak value p of the amplified signal 8〇. The valley value detection module 2 014 detects the valley value β of the amplified signal S 〇. Subtractor: 2016 subtracts the valley value B from the peak value P to obtain the envelope surface signal e. The analog to digital converter 2004 converts the analog envelope surface into a digital envelope #唬E'. Figure 21a shows the amplified signal S〇, and Figure 21b shows the envelope surface detection module 2002 and the analog-to-digital converter 2〇〇4 digital envelope signal E generated by the signal s〇 of Figure 21a. The digital envelope "No. E" is then sent to the digital control module 2006. The digital control module 2〇〇6 includes a subtractor 2〇22, a gain controller 〇758^A32245TWF1(2〇1〇i〇28) 26 1337345 Amendment date: 99.12.15 Revision of the patent specification of 96120109. Section, integrator 2〇26? Subtractor assisted - reference electric dust r minus enveloping surface signal E to obtain difference signal D. Gain controller 2 〇24 reduces the amplitude of the difference signal D to the lower layer and obtains the difference signal splitter 2026 to integrate the difference signal D to obtain the digital gain signal %. Figure 21c shows that the reference voltage is corresponding to the first training map. The difference signal D of the envelope surface number E. 帛21d shows the digital gain signal m generated by the difference signal D of the digital control module 2 四 (4), and finally the digital gain by the digital to analog converter 2008 Φ gain signal M' to amplify the input signal Si. ^Change to money Figure 22 is a block diagram of another digital automatic boost control 2200 with low sampling rate according to the present invention. Digital automatic gain controller and 20th Figure digital automatic gain controller 2〇〇〇 Only the envelope surface defect detection group 2202 is different. The envelope surface detection module 22〇2 includes a rectifier 2212 and a low-pass filter 2214. The rectifier 22]2 first generates an absolute value signal I of the letter 1 1°〇. The pass filter 2214 then filters out the high frequency noise from the absolute value signal to obtain the envelope signal Ε. The 23a picture shows the amplified signal S〇, and the 23b shows the envelope surface detection module 22〇2 The envelope surface signal E generated by the signal S of Fig. 23a. The analog to digital converter 2204 then converts the analog envelope surface E into a digital envelope signal & not shown in Fig. 23c. The digital control module 2〇〇 6 Then, according to the digital envelope surface signal E, a digital gain signal M is generated. Figure 23d shows the difference signal D corresponding to the envelope surface signal E of the second pattern, and Fig. 23e shows the digital control module 2206 from the 23d The difference signal 图 generated digital gain signal Μ. Finally, the digital to analog converter 22 〇 8 will be the digital gain letter 0758-Α3224 5TWF1 (20101028) 27 1337345 Revision date: 99,12.15 No. 96120109 patent specification amendment Converted to analog gain signal M, The input signal Si is amplified. Thus, the booster amplifier 丨91〇 can amplify the input signal Si according to the gain signal M to obtain the output signal S〇. & Analogy to the input of the digital converters 2〇〇4 and 22〇4 The signal is, the facet signal E, analog to the analog converter of the digital converters 2004 and 2204, the analogy of Figure 5 is lower than the digital converter 5〇4. In order to ensure that the / month exact nickname is obtained, the analogy must be improved. Signal resolution to digital converters 2 (10) 4 and 2204. This can be observed from the digital envelope signal of the m-th image and the & However, as the sampling rate increases, the signal cancellation can be correspondingly reduced. Figure 24 is a block diagram of a digital automatic gain controller 24A having low signal resolution in accordance with the present invention. 24〇2 count^自. The dynamic reading system 11 includes the envelope (4) measuring module subtraction is 2403 '1 bit analog to digital converter 24 〇 4 bit control module 鸠, and digital to analog converter ^ measuring module including rectifier 2412, rectifier 24] 2 count == the absolute value of the number S0 and output = '] 仏 L ^ ® view b music 2) a picture shows 〇 〇, the 25th picture shows the envelope surface signal E of the envelope surface detection module 24n. Next, the subtractor = due to the IS two-sided signal £ to obtain the difference signal D. Tian K envelope surface 仏 5 Tiger E is not like 筮 (9) and "p " low-pass filter processing, envelope surface (4) and difference letter ... This, a meta analog to digital converter 24: = 卞 vibration. The ratio of the difference signal S to the 样^-like frequency will be the same as the frequency of the signal S0. "Zhong. Xuanhe sampling frequency 0758-A32245TWFI (20101 〇28) 28 Revision date: 99.12.15 苐96丨』1〇9 patent t (four) book revision H 25C does not correspond to the envelope surface signal E of Figure 25b The difference bit data stream D'. Although the analog to digital converter 2404 4 sampling rate is higher, but because the 1-bit data stream has only two values, the standing signal analysis is better than the 24th and *22, The analogy to the number Z, the 2404 and 2204 digital envelope signal E, the resolution of the people as shown in Figure 23c and Figure 21b. The difference signal D, then send = position control core group 24 () 6 The digital control module 2 includes a gain control. 2424 and an integrator 2426. The gain controller reduces the mid-range of the difference signal d to the lower layer and obtains the difference signal d". The integrator Μ% product knife difference 彳5 5 tiger to get the digital gain signal M. The second brother figure shows the digital control; the digital number M generated by the difference signal 〇" of the 24G6 from the 21st picture. Finally, the digital-to-analog converter 24〇8 converts the digital 曰 化 Μ to the analog gain signal M. In order to amplify the input signal Si, the variable gain amplifier 191 can amplify the input k number S according to the gain signal m to obtain the output signal S〇. The invention provides a digital automatic gain control for amplifying the signal, and the white digit is automatically increased. The controller must process the signal at a high sampling frequency and a high signal resolution. However, the digital automatic gain control provided by the present invention can process the signal at a low sampling frequency or low signal resolution, while the human 2 maintains the high quality of the signal. Since the low sampling frequency or low signal resolution simplifies the circuit structure and signal processing, the circuit performance can be improved and the cost of circuit construction can be reduced. Figure 26 is a diagram of the demodulation pre-groove address (Address In Pregroove, according to the present invention). Adip) Block diagram of the device 2600 of the symbol. Device 26〇〇〇758-A32245TWF1(2〇i〇i〇28) 29 1337345 Revision date: 99.12.15 No. 96120109 The specification revision includes a wobble signal generating module 26〇2, a reference wobble signal generating crying 2604, a waveform difference measuring module 26〇6, a symbol σ〇polar red π ♦ a singularity-like matching group 22608. The handle set 2602 first generates a wobble signal from the source ## reflected from the obstructed surface of the optical disc. In each of the ^, U, '% of the examples, the wobble signal yields f: for a push-pull processor plus 'Pun process 〇r), and the reflected signal strength of the 迢-side is subtracted from the reflection Μ intensity of the other side to obtain the sway signal. When the swaying reed; the field swinging 1 port 5 tiger is produced, the reference swing letter is generated and oscillated The signal has the same frequency and has the same phase as the positive swing of the wobble mark—refer to Figure 27, the first to eighth of Figure 27...Λ b see the brother.../j shows that the swing signal and the wobble wave are implemented In the example, the reference wobble signal generator 2 is just a phase-locked loop, and the oscillating (four) positive swing test swing signal is generated. / The waveform difference measurement module employs to measure the difference between the wobble signal and the wobble signal to obtain - series difference measurement. In one embodiment, the difference . In the phase difference to 0 ^ ^ ^ / from parties' difference measurement value is set based on the swinging-based "Tiger a 5 wobble signal period is determined, corresponding to - Qing bit. Figure 3 of the 3rd / Alien measurement .g s Figure 4 shows the phase of the deer (10) if difference measurement. Since the phase of the wobble signal refers to the phase of the wobble period of the positive phase of the wobble signal, if the wobble == phase wobble cycle, the phase difference is ., and if the wobble ring is in the /phase wobble cycle, the phase difference is [0028] Fig. 28 is a graph of waveform difference measurement module 0 according to the present invention. θ. Waveform difference measurement module 2800 includes phase comparators 28〇2, 0758-A32245TWF1 (201 〇1 〇28) 30 1337345 Revision date: 99.12.15 Amendment of patent specification No. 96]

The counter is deleted. The phase comparator employs a comparison of the phase of the wobble signal and the reference wobble signal to obtain a phase difference signal. In the embodiment, the phase comparator 2802 4 x0R gate operates on the wobble signal and the reference wobble signal to obtain a phase difference signal. Because the job is only: '5Ησ and the reference swing u are the same as the high voltage or the same low voltage: the phase difference signal of the potential, otherwise the output low potential: phase, different signal 'the resulting phase difference signal The difference between the wobble L number and the McCaw wobble signal can be appropriately reflected. The counter 28〇4 then counts the length of time that the phase difference signal reaches the high potential for each wobble signal period of the wobble signal to obtain a difference measurement corresponding to the ADIP bit. The counter 2_ counts the difference value based on the clock signal having a frequency higher than the reference wobble signal. For example, the difference measurement value in the fourth line of Fig. 27 is 16 times the reference swinging money fresh (four) pulse signal. Ten, so the difference measurement is between 〇~16. After the measured values are generated in the field difference, the symbol type matching module compares the ADIp bits according to the difference measurement value to match the probability of the permutation pattern of each -ADip symbol to determine the A·symbol contained in the wobble signal. Figure 29 is a block diagram of the symbol type matching module according to the present invention. The symbol type matching module 29 includes a collection of $29, 2, an association: an array 2904, and a maximum possible comparison module 2906. Since each ADIP pay = contains 8 ADIP bits, ❿ 8 ADIp bits are arranged in such a way that one type of ADIP symbol is assigned to it, and the collector 29 〇 2 collects 8 differential measurement values for Compare the ADHM epoch arrangements that they represent. Guan Yuyi array 2904 includes a plurality of correlators (c〇rrelat〇r), each correlator 0758-A32245TWF1 (20101028) 1337345 No. 96120丨09 patent specification amends this revision period ·· 99,12.15 for consecutive 8 The difference measurement value is multiplied by the positive and negative signs generated by the a-position of the possible Amp symbol, respectively, to obtain the correlation value, and the sum of the correlation values is obtained to obtain the AD!p bit corresponding to a certain arrangement. Probability. For example, the difference measured on line 4 of Figure 27 is 14; "2, _3, 2, 〇, 15, 丨1. Since the ADIP bit corresponding to the ADiP data symbol is "10000011", the correlation values of the two are U, -2, -], ·3, j, 〇, I 5, Π, and the sum is 32, indicating the ADIP bit. The yuan corresponds to the probability of ADIp poor material. The Α〇ιρ bit of the corresponding ADIP data symbol is 10001100", and the correlation value with the difference measurement value is 20]), -1, and the sum is -16, indicating the ADIP bit ADIP data] Probability. Similarly, the corresponding A(10) homology bit is "(1) Delete", which is related to the difference measurement value m. 3, -2'0, ·丨5, -1丨, and the sum is -8, indicating the ADIP bit. Corresponds to the probability of Amp with the same symbol. The comparison module 29% then compares the probability values representing the difference measurement period to determine the fine p symbol. The maximum possible ratio _ group 2906 includes three comparators, help, period and question, continent, 2936. Comparator, 2924, and hiring compare two of the three odds, five-k pa, to determine which probability value is greater. Each gate 2932, 2934, 2936 pile 芏 sw 6 receiver and then the comparator 2922, 2924, 2926 output comparison results are two or two ^ have the largest machine: ... decide which should be ADIP data 〇, (four) 卜斗牛f In the case of the case, in the figure of the brother 27, the solution value of the maximum (four) material is W, and the von 32 is output, and the ADIp data is output. 0758-A32245TWF1 (20101028) 1337345 Amendment date: 99.12.15 No. 96120] Amendment of Patent Specification No. 9 '30 is a method for demodulating ADIP symbols according to the present invention. First, a wobble signal is generated in step 3002. Next, in step 3004, a reference wobble signal is generated which has the same frequency as the human wobble 彳§ and has the same phase as the positive wobble period of the wobble signal. Then, in step 3〇〇6, the phase difference between the right b and the reference wobble signal is measured to obtain a phase difference #. 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 3〇〇8, the sign of the ADIP bit corresponding to the φ ADIP symbol is respectively multiplied by the difference measurement value to obtain a series of correlation values. Then, a series of correlation values are added in the step to obtain the probability values corresponding to the respective ADIP symbols. Next, in step 3012, the probability value corresponding to each ADIP symbol is compared to output an 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 to demodulate ADIP symbols. According to the HD-DVD specifications, • Each ADIP symbol consists of only one ADIP bit, which can be a normal phase wobble (NPW) or an Invert phase wobble (IPW). Therefore, since the ADIP symbol can only be a positive phase wobble period or a negative phase wobble period, the symbol type matching module 2608 of the device Moo can be replaced by a siicer or a decision maker to generate ADIP symbol. Figure 31 is a block diagram of an apparatus 3100 for demodulating ADIP symbols of an HD-DVD in accordance with the present invention. Except for the clipper 3108, the other modules of the device 31 are substantially the same as the device 2600 of Figure 26. 0758-A32245TWF1 (20101028) 1337345 Amendment date: 99.12, 15 The modification of the patent specification No. 09, No. 09 is based on the same principle as the apparatus 2600 for demodulating an ADiP symbol, and the present invention further provides a demodulation pre-pit. (4) The device called. Figure K is a block diagram of a device 3 for demodulating a pre-pitted bit according to the present invention. Figure 3200 includes a Hamming distance, such as a coffee maker, and an array 3202 and a symbol type determination module. First, a wobble signal with pre-pit bits is read from the disc. Since the pre-pitted bit may appear in the swinging k-number can be greedy frame (four) d frame) or the even data frame (speaking fr), this is first collected by a pre-pitted bit element collection module and evenly poor. The pre-pits of the frame are formed to form a pre-pitted bit. Referring to Figure 9, the three pre-pits can be arranged as "(1)" to form a pre-pit of the poor frame. The sync symbol is arranged as "11" to form the pre-pit sync symbol ' of the odd-poor frame' as "1〇1" to form the pre-pitted pit I symbol ' or the county's "(10)" In order to form the dimple data 〇h. Therefore, if the pre-pit dimple collection module collects the pre-pits of the odd data frame and the even dip box, there should be six pre-pit dimple sets. Different pre-pits are arranged in the same order as the pre-pits of the even f-frames and the 9' symbols 1 1 1 〇〇〇"'s pre-pits of the odd-numbered data box ^(10)' The pre-pit data of the data frame is "deleted (9)", the pre-drilled data of the odd data frame is "winning the "000101", the data frame is pre-, the pit data is 0 symbol "100_", and the odd data frame The pre-pit data is 〇〇〇1 0Q. The Hamming distance generation array 32〇2 measures the pre-pit number and the pre-pits corresponding to the six pre-pit symbols. Arrange "(1)_", "Coffee 10", "101000", "_101", "Difficult", 〇758-A32245TWFi(20101028) 34 1337345 Revision date: 99.12.15 Revision of the patent specification No. %120109 (8)〇 Hamming distance between 1〇〇". Hamming distance generation array 32〇2 includes a plurality of Hamming distance generators 3212, 32] 4, 3222, 3224, 3232, 3234, each Hamming distance generator measurement The Hamming distance between the pre-pitted bit set and the pre-pitted bit-element arrangement corresponding to a pre-pitted symbol. Since the Hamming distance represents a bit of the same position of two string bits but has different values The number, so the Hamming distance can properly reflect the probability that the pre-pit set corresponds to a certain pre-pit symbol. The symbol type decision module φ 3204 then finds the probability value with the smallest Hamming distance. Determining the pre-pits to determine the pre-pits represented by the set of pre-pits As shown in FIG. 32, the Hamming distance generated by the Hamming distance generation array 3202 is input to the symbol type determination module 3204, wherein the symbol type determination module 3204 includes a plurality of comparators 3216, 3218, 3226, 3236, 3238, 3228. The comparison module 3212 and the comparison module 32M divide the pre-pit and the sync symbols "1 1 1 〇〇〇" and "(10) 〇 1 1 〇". In comparison, the resulting Hamming distance is input to comparator 3216. Comparator 3216 compares the received Hamming distance to obtain the minimum Hamming distance therein and inputs it to comparator 3218. The comparator 3218 determines whether the received minimum/money-moon distance is less than a threshold value, and if the received minimum Hamming distance is less than the threshold value, the symbol type determination module 32〇4 determines the pre-pit bit system synchronization. Fu Yuan. Similarly, the comparison module 3222 and the comparison module 3224 compare the pre-pitted bit and the data 1 symbol "101000" with "〇〇〇〗 〇", respectively, and input the obtained Hamming distance into the comparator. 3226. Comparator 3226 〇 758-A32245TWFl (201〇i〇28) 35 1337345 Revision date: 99.12.15 Patent specification No. 96120109 modifies the Hamming distance received by this comparison, obtains the minimum Hamming distance and inputs it into comparator 3238 . The comparison module 3232 and the comparison module 3234 compare the pre-pitted bit and the data symbol "1" and "(8)〇1", respectively, and compare the obtained Hamming distance inputs. 3236. Comparator 3236 compares the received Hamming distance to obtain the minimum Hamming distance and inputs it to comparator 323. Comparator 3238 inputs the data to the minimum Hamming distance input. The comparator 3228 determines the minimum received data 1 Whether the Hamming distance is less than a threshold value, and if the received data 丨 minimum Hamming distance is less than the threshold value, the symbol type determination module 32〇4 determines the pre-pitted bit system data 1. And the comparator 3238 inputs the data 〇 minimum Hamming distance to the comparator 322S, and the comparator 3228 determines whether the received data 〇 minimum Hamming distance is less than a threshold value, and if the received data 〇 minimum Hamming distance is less than the threshold value, then The symbol type determination module 32〇4 determines the pre-pitted bit-element data 〇a. The method of the A Dip symbol and the pre-pit symbol are provided in the § week wobble signal. 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 address information. By measuring the sum of the correlation values or the Hamming distance to evaluate the probability that the AD1P bit το or the pre-pit bits meet certain permutations, respectively, to obtain ADIP symbols or pre-grained symbols. Because the present invention evaluates the sought AD [P symbol or pre-pit symbol" in a maximum probability manner, the method of the present invention can tolerate the wobble signal with a larger noise than the conventional method, thereby improving Demodulation of the correctness and effectiveness of ADIP symbols or pre-pits. 0758-A32245TWFl(201〇l〇28) 36 1337345 Revision date: 99.12.15 Patent specification No. 96120109 amends the younger 33a and 33b The signal Sad or the signal SBC taken out from the blank section and the non-blank zone slave are respectively displayed. The optical disc read head detects four reflected signals sA, sB, Sc, and Sd, wherein Sa, %, %, and Sc respectively reflect the reflection intensities on both sides of a track. Figure 34 is a block diagram of the apparatus 34 for detecting a blank section of an optical disc by a wobble signal. The device 34〇〇 includes a push-pull processor 3402, a low-pass filter=3404, and a blank detection module 34〇6. The push-pull processor is similar to the push-pull processor 132 of Figure 3, and produces a wobble signal 扪. The low pass filter 34G4 filters the high frequency signal of the wobble signal B1 to obtain a pendulum = signal B2. The blank detecting module 3 generates a blank L 依据 according to the wobble signal β2 to determine a blank portion of the optical disc. The blank detection module 34〇6 includes an envelope surface detection module 34〇8 and a comparator 341〇. The enveloping area modulo 3408 Detects the enveloping surface of the apostrophe 82 to obtain the envelope surface signal B3' as shown in Fig. 33c. Comparator 341 〇 compares envelope surface signal B3 with a threshold value to produce a blank signal B4 as shown in Figure 33d. The comparator 3410 can be a clipper (ieD or a decision maker). Therefore, the blank signal can indicate a blank section of the optical disc. ,, because the swing number is determined by the signal sad and SBC. The problem that the different optical discs generate different &amplitude signal strengths is solved, so the same threshold value can be used for the blank section of the comparator %(7) disc. The weeping % graph is based on the present invention. The method of detecting the blank section 3500 is firstly modified in step 35 〇 2 by the push-pull type of the king device to generate the optical disc 758-A32245TWFl (2〇l〇, 〇 28) 37 Patent Specification No. 120120109 This revision date: 99.12, 15 == The sway signal of the high frequency noise mi= of the swaying signal is shifted in step 35〇4. Then in step 3.3, the 3503 ° of the tear is made. - a threshold value to produce - a blank signal white signal may indicate a blank section of the optical disc. u " = the invention has been disclosed in the preferred embodiment as above, but it is not used:: the invention, anyone skilled in the art, In the range of not =:, when you can make some changes and retouch, The guarantee of this = "Where the scope of the patent is bounded by the scope of the patents / [Simplified description of the diagram] Figure 1a is a swing signal without data; No. 1 b and 1 c The raw signals SAD and Sbc with data are respectively displayed; the id image shows the first lb and the first

4. U·, ^ v. Port, I port is present > AD and SBC are subtracted from the wobble signal carrier; Brother 2 is the block diagram of the conventional wobble circuit for measuring the absolute time of the pre-groove; the block diagram of the third block is for the detect The f-swing signal detecting circuit f 4 for measuring the pre-groove address is a block diagram of a conventional circuit for detecting the wobble number frequency; the fifth picture is a block diagram of the digital automatic gain controller; f 6a is The wobble signal with the symbol of the pre-grooved address; the 6b and 6C are the data with the pre-grooved address respectively 〇〇758-A32245TWF1(2〇I〇i〇28) 38 1337345 Date ·· 99.12.15 96] The revised specification and information of the patent specification No. 20丨〇9] The wobble signal of the symbol; Figure 7 is a conventional method for adjusting the wobble signal with the pre-grooved address information. The process of Figure 8 shows the pre-pits in the wobble signal containing two consecutive data; Figure 9 shows the four pre-pit symbols that can be represented by the three pre-pits. Information content; Fig.; 〇® is a block of the wobble signal detecting circuit according to the present invention. FIG. 11 is a sampling rate according to the present invention. a partial block diagram of the wobble signal detecting circuit which is changed by the frequency of the wobble signal; FIG. 12 is a partial block diagram of the wobble signal detecting circuit having a 1-bit analog to digital converter according to the present invention; 3 is a block diagram of a device for detecting a carrier frequency of a wobble signal and recognizing an optical disc format according to the present invention; and FIG. 14 is a block diagram of a device for swinging a signal carrier frequency according to the present invention; FIG. 15a is shown in FIG. The oscillating signal filter before the tunable bandpass filter is filtered. Figure 15b shows the post-signal generated by the tunable bandpass chopper; Figure 15c shows the envelope surface signal of the filtered signal; Section 〖6 is a device for discriminating the disc format according to the present invention. 0758-A32245TWF1C20101028) 39 1337345 Patent Specification No. 96120109 Revision of this amendment date: 99.12.15 Block diagram; Figure 为 is a detection optical disc according to the present invention A flowchart of a method for swinging a frequency; FIG. 18 is a block diagram of a wobble signal detecting circuit; and FIG. 19 is a block diagram of a digital automatic gain controller according to the present invention; The block diagram of the digital automatic gain control with low sampling rate according to the present invention; the 21st a picture shows the amplified signal; the 21st picture shows the envelope surface defect test module and the analog to digital converter by the 21st figure The digital envelope signal generated by the amplified signal; 21c is shown as the difference signal corresponding to the envelope surface signal of the first training diagram when the reference voltage is $]; the 21st is the differential signal generation of the digital control module from the 2U diagram The digital gain signal; Fig. 22 is a block diagram of another digital automatic gain controller having a low sampling rate according to the present invention; the 23a is a magnified signal; and the 23b is an envelope surface detecting module by the 23& The envelope surface signal generated by the signal of the graph; the 23c graph shows the digital envelope signal obtained by the analog-to-digital converter converted from the analog envelope surface of the second map; the 23d graph shows the envelope surface signal corresponding to the 23e graph Difference signal; , 〇 758.A32245TWF1(20I01〇28) 40 1337345 Patent specification No. 96120109 Revision of this amendment period: 99.12.15 Figure 23e shows the digital control module from the 23d chart The digital gain signal generated by the difference signal; FIG. 24 is a block diagram of the digital automatic gaining controller with low signal resolution according to the present invention; the 25a image shows the amplified signal; and the 25b shows the envelope surface detecting module The envelope surface signal generated by the signal of 帛2]a; the 25c diagram shows the 1-bit data stream corresponding to the difference signal of the envelope surface signal of FIG. 25b; and the 25th figure shows the digital control module self-clicking diagram The digital gain signal generated by the difference signal; FIG. 26 is a block diagram of the apparatus for demodulating the pre-groove address symbol according to the present invention, and FIG. 27 is a diagram showing the signal of the symbol of the demodulated wobble signal according to the present invention. Figure 28 is a block diagram of the waveform difference measurement module according to the present invention; the brother figure 2 is based on the present day--and, 〗 〖Dou.m> Block diagram of the group;

Figure 30 is a flow chart of a method for demodulating an ADIP symbol according to the present invention; /; IL Figure 31 is a block diagram of an apparatus for demodulating an ADip symbol of hd_dvd according to the present invention; The invention discloses a device for demodulating a pre-pitted bit. 0758-A32245TWF1 (20101028) 1337345 Patent specification No. 96120109 is amended. The correction date is: 99.12.15 block diagram; the 3a diagram and the 33b diagram are respectively displayed from the blank section. And the signal taken out by the non-blank section; the 3rd C chart shows that the envelope surface detecting module prepares the envelope surface of the wobble signal to obtain the envelope surface signal; the hd picture shows the comparator not comparing the envelope surface signal with a threshold value A blank signal is generated; Figure 34; and 35® is a flow chart of a method of detecting a blank segment in accordance with the present invention. [Main component symbol description] (Fig. 2.) 2〇2~ bandpass filter; class~ analog to digital converter; 206~ pre-groove absolute time detector; 208~ phase-locked loop; (Fig. 3 ) ~ low pass filter; 306 ~ pre-groove address detector; 304 ~ analog to digital converter; (Fig. 4) 314 ~ analog to digital converter, · 302 ~ band pass filter; 308 ~ lock Phase loop; 402~ automatic gain module; 404~ bandpass filter; 406~pass-through filter; 410~pulse calculation module. 408~two-bit converter; ,, ' ' 0758-A32245TWFl (20101028) 42 1337345 Amendment date: 99.12.15 'Revision of the patent specification No. 9612CH09 (Fig. 5) D02 to envelope surface detection module; 504~ analog to digital converter; M6 to digital control module; 508~digit to Analog converter; 510~ analog variable gain amplifier; (Fig. 10) 1002, 1012~ low pass filter; 1004, 1014~ high pass filter;

1006, 1016~ automatic gain controller; 1020~subtracter; 1024~high pass filter; 1028~ pre-groove address detector 1030~digit bandpass filter; 1022~anti-aliasing filter; 1026~ analog to digital Converter; 1032 ~ pre-groove absolute time detector; 1034 ~ swing signal phase-locked loop. (Figure 11)

1102 ~ anti-aliasing waver; 11Q4 ~ high-pass filter; 11 06 ~ analog to digital converter; 1110 ~ digital bandpass filter; 1112 ~ pre-groove absolute time detector; 1114 ~ swing signal phase-locked loop. Figure 12) Winning anti-aliasing filter; 12〇4~ high-pass filter 1206~1 bit analog to digital conversion 1210~digit bandpass filter ·, 0758-A32245TWF1(20101028) 43 1337345 Revision date: 99.12.15 Patent specification No. 96120109 modifies this 1212~pre-groove absolute time detector; 1214~ swing signal phase-locked loop; (Fig. 13) 1312, 1322~ low-pass filter; 1314, 1324~ high-pass filter; 1316, 1326~ automatic gain controller; 1330~subtraction$; 1332~anti-aliasing filter; 1334~DC partial elimination module; 1336~one 疋 conversion module; 1342~ adjustable bandpass chopper; 1 344~frequency Detection module; 1 346~CD format recognition module; 1320~ push-pull processor; 13〇4~frequency detection and optical disc format recognition module; (Fig. 14) 1334~DC partial elimination module U42~ adjustable bandpass filter; 14 02~ Envelope surface detection module; 1332~anti-aliasing filter; 1336~two-bit conversion module; 1344~frequency detection module; 1404~maximum amplitude detection module (16th picture) 1334~DC part Elimination module 1342~ adjustable bandpass filter; 1346~disc format recognition module; 1602~ envelope surface detection module; 16〇4~maximum amplitude detection module (Fig. 18) 1 332~anti-aliasing Filter; 1 336~one. Meta conversion module; 0758-A32245TWF1 (20101028) 44 1337345 Patent specification No. 96120109 modifies this 1 802, 18] 2~ low pass filter; 1804, 1814~ high pass filter; 1 806, 1 816~ automatic gain controller; 1820~subtracter; 1 824~ pre-groove address detection 1832~ bandpass filter; (Fig. 19) 1 8 2 2~ low pass waver; 1 834 ~ swing signal phase-locked loop; 1904 ~ analog to digital converter; 1908 ~ digit to analog conversion cry · 1902 ~ envelope surface detection module; 1906 ~ digital control module; 1910 ~ variable gain amplifier; 20)) 2002~ envelope surface detection module; 2014~ valley bottom value detection module; 2006~digital control module; 2022~subtractor; 2026~ integrator; (Fig. 22) 2202~ envelope surface detection module; 2214~low-pass filter; 2206~digital control module; 2224~gain controller 2226~ integrator; (Fig. 24) Revision date: 99.12.15 2012~point peak detection module; 2004~ analog to digital converter; 2008~digital to analog converter; 2024~gain controller; 2212~ Rectifier; 2204~ analog to digital converter; 2208~digital to analog converter; 2222~subtracter; 2402~ envelope surface detection module; 2412~rectifier; 0758-A32245TWF1 (20101028) 1337345 Patent Specification No. 96120109 The revised period: 99.12.15 2404 ~ one element analog to digital converter.; 2406 ~ digital control module; 2408 ~ digit to analog converter; 2424 ~ gain controller; 2403 ~ subtractor; 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; (31st) 3102~ wobble signal generation module; 3 104~ reference wobble signal generator; 3106~ waveform difference measurement module; 3108~ wearer; 32)) 3202~Hamming distance generation array; 0758-A32245TWF1 (20101028) 46 1337345 ' Patent specification No. 96120109 Amendment date: 99.12.15

J • 3204~ symbol type decision module; 3212, 3214, ' 3222, 3224, 3232, 3234 ~ comparison module; 3216, 3218, 3226, 3236, 323 8, 3228 ~ comparator; (Fig. 34) 3402 ~ push-pull processor; 3404 ~ low-pass filter; 3408 ~ envelope surface detection module; 34 ] 0 ~ comparator. 0758-A32245TWFl(20101028) 47

Claims (1)

Amendment date: 99.12.15 Patent Specification No. 96120109 Amendment 10, Patent Application Range: L A device for detecting the carrier frequency of a wobble signal of an optical disc, a package--DC partial elimination module, removing a first wobble signal signal a DC portion for obtaining a second wobble signal; a two-bit conversion module pure to the DC portion canceling module, converting the second wobble signal into a one-bit data stream; an adjustable band pass comparator Pure to the two (four) replacement module, filtering the t μ stream - the components outside the adjustable frequency band, so that the center frequency of the adjustable frequency band is gradually adjusted according to a frequency selection signal; - frequency detection The module 'couples to the maximum amplitude of the filtered signal after the adjustment, and suppresses the mountain.疋^. Also find out the center frequency of the tunable frequency band that makes the filtered signal taste large. · The oscillating signal carrier frequency is such that the transition occurs after the transition The center frequency of the adjustable band range. . 2. The device for applying the patent range I signal carrier frequency, wherein the metering disc 〃 巧 巧 巧 巧 巧 巧 detection module comprises: an envelope surface detecting module coupled to the signal after the measuring Envelope surface to obtain a - envelope surface detection-capture detection module, coupled to the envelope surface to measure the amplitude of the envelope surface signal to obtain the maximum amplitude,,,, and, 3. The device of the signal carrier frequency described in the first item, the agricultural medium, the ', the swing', the Chinese frequency selection money control, the adjustable 0758-A32245TWFJ (20101028) 48 1337345 The patent specification of the 96112109 revision of the amendment Period: 99.12.15 The bandpass filter sequentially filters a plurality of predetermined frequency band ranges to filter the binary data stream, and the preset frequency bands=the frequency band overlaps the carrier frequency of the wobble signal. ' & s collection 4 · The apparatus for detecting the signal carrier frequency according to claim 3, wherein the oscillation of the optical disc == frequency is such that the filtered signal generates the center frequency of the maximum amplitude range . Pre-. Frequency τ 5, such as the scope of patent application! The detection of the carrier frequency is as described in the item, wherein the device further comprises an anti-aliasing filter, which is connected to the DC partial cancellation mode and the anti-aliasing filter limit - the third The frequency band of the wobble signal is obtained to obtain a: wobble signal 'to make the first wobble signal: bhannon-Nyquist sampling theorem. 6. For example, the device of the Shenqing patent relates to the signal carrier frequency of the light control device of the fifth item, wherein both sides of the track of the optical disk are The intensity of the reflected k is - the fourth wobble signal and the fifth wobble signal, and the device further comprises a push-pull processor, pure to the anti-aliasing filter, including: TO low pass; High-frequency noise of the four wobble signals to obtain a sixth wobble signal; ^ first low-pass filter, removing high-frequency noise of the fifth wobble signal to obtain a seventh wobble signal; ^ first pass filter And being coupled to the first low pass filter to remove low frequency noise of the sixth wobble signal to obtain an eighth wobble signal; 0758-A32245TWF1 (20101028) 49 105Ί345 Amendment date: 99.12, 15 No. 96120] No. 09 The patent specification modifies the first-pass filter, is coupled to the second low-pass filter, and the fourth (four) signal is obtained by the fourth-fourth signal--the ninth swing signal bearing-automatic gain controller is coupled Up to the first high pass; year: benefit, adjust the eighth swing signal to a suitable amplitude; "port... a second automatic gain controller is connected to the second high pass, and the ninth wobble signal is faded to the appropriate amplitude The subtraction method is coupled to the first An automatic gain controller, the controller, and the inverse distortion filter, from the eighth swing: 唬 subtracting the ninth swing signal to obtain the third swing motion ▲ 7 · as claimed in the patent scope! The device for swinging == frequency of the test piece, wherein the DC partial elimination module is: high-wave benefit, and the two-bit conversion module is a comparator. Debt measurement: a device for oscillating a 3-carrier frequency of a disc, wherein the anti-aliasing filter is a low-pass filter. 9. A device for recognizing the format of an optical disc, comprising: a Sie partial cancellation module, removing the -th-swing signal g Al) straight part ▲ to obtain a second swing signal; conversion module, transferred to the DC part elimination module, conversion of the second pendulum movement lacking helmet _, _, Qiu Chu is now a two-digit data stream ; _ can be a week _ _ pass; care wave benefits, lightly connected to the two-bit conversion module, filter "Xuan Yifan cultivating stream - adjustable band into; after - transition signal, a plurality of The candidate optical disc = two = number carrier frequency is sequentially designated & 4, α 疋 6 玄 玄 玄 ; ; ; ; 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Patent Specification Revision 4 Optical Disc Format Identification Module, Coupling To the tunable bandpass filter. . Determining the maximum amplitude of the signal after subtraction, and finding the candidate optical disc format corresponding to the carrier frequency of the wobble signal that causes the maximum amplitude of the filtered edge to be generated; wherein the format of the optical disc is such that the filtered signal is generated The maximum amplitude of the candidate disc format. 10. The device for identifying the format of the optical disc as described in claim 9, wherein the frequency detecting module comprises: an envelope detecting module coupled to the adjustable band pass filter, detecting The envelope surface of the filtered signal is used to obtain an envelope signal; and a maximum amplitude detection module is coupled to the envelope surface detection module to detect the amplitude of the envelope surface signal to obtain the maximum amplitude. 11. The clothing of the format of the disc for discriminating the disc as described in item 9 of the claim 5 is 'the towel side device further includes an anti-aliasing filter (four) 丨fmer), and the μ is connected to the DC portion eliminating module. The anti-aliasing chopper limits a frequency band range of the second wobble signal to obtain the first wobble signal such that the first wobble signal conforms to the Shann〇n_N(eight)ujst sampling theorem. 12. The apparatus for identifying the format of an optical disc as described in the scope of patent application 其u, or the reflected signal strength of the two sides of the optical disc - the fourth (fourth) dynamic signal and the - fifth fifth oscillating signal, The method further includes a push-pull processor coupled to the anti-aliasing filter, including: a brother-low pass filter that removes high frequency noise of the fourth wobble signal to obtain a sixth wobble signal; The second low-pass chopper 'removes the high-frequency choke of the fifth wobble signal 758-A32245TWF1 (2〇i〇i〇28) 5! The patent specification of No. 96120109 amends this revision date: 99.12, 15 to get one The seventh sway signal; - the first high-pass filter, 鲤 μ 嗲箪 嗲箪 嗲箪 & & & 产 产 产 褐 褐 褐 褐 褐 褐 褐 褐 褐 褐 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂 昂a wobble signal; a wave remover, which is connected to the second low-pass waver, removes the low-frequency noise of the "seven-swing" to obtain the ninth wobble signal; the device ^: automatic gain control (four), coupled to the first - Qualcomm 遽 凋 凋 玄 玄 玄 玄 玄 玄 玄 摆动 摆动 摆动 摆动 摆动 摆动 摆动 摆动 摆动 摆动 摆动 摆动The controller, the second high-pass wave, the ninth swing signal, the sum of the amplitudes; ^ the subtraction is coupled to the first-automatic gain controller, the second== controller, and the anti-aliasing a filter, the ninth wobble signal is subtracted from the eighth wobble signal to obtain the third wobble signal. 13. The identification light device of the U.S. Patent Application Serial No. 9 wherein the DC partial cancellation module is - High-wave finder, 1 ° 一位 The one-bit conversion module is a comparator. = 4. The disc for discriminating the disc of the disc as described in the scope of claim U, wherein the anti-aliasing filter A low-pass filter includes a method of measuring the carrier frequency of the wobble signal of the optical disc, and removing a DC portion of the first wobble signal to serve a second wobble signal; A wobble signal is a two-bit data stream, · eight, filtering: one of the two-bit data streams outside the adjustable band range, from the piece to the filtered signal, wherein the center of the adjustable band range is 0758 -A32245TWFK2010, 028) 52 1337345 Revision date: 99.丨2.15 96] 20U) No. 9 patent specification modifies the frequency according to a frequency selection signal stepwise adjustment; determines the maximum amplitude of the filtered signal; and the slave gate / ^ makes 4 over; after the k tiger produces the maximum amplitude of the The frequency of the modulating band of the tuned band; the carrier frequency of the oscillating signal of the optical disk is the center frequency of the tuned frequency band of the amplitude of the filtered signal. The method for measuring the swing frequency of the optical disc as described in the section 'The maximum amplitude of the filtered signal includes the following steps: · detecting the envelope surface of the filtered signal to obtain an envelope signal and detecting The amplitude of the envelope signal is obtained to obtain the maximum amplitude. "If the scope of the patent application is stipulated in item 6]; the carrier frequency of the pendulum is smashed, and the plurality of dare band ranges of the towel are sequentially determined to be the tunable frequency band to filter the binary data stream. The combination of the preset frequency band ranges is overlapped with the wobble signal carrier frequency. / 丄 18. The method for detecting the disc of the optical disc as described in claim 17 of the patent application:: The method of the carrier frequency of the phrase 'where the optical disc The oscillating signal carrier frequency is a center frequency of the preset frequency band of the maximum amplitude of the signal after the overshoot. a 19. The oscillating signal carrier frequency of the detecting optical disc according to claim 15 The method wherein a plurality of candidate optical disc formats = mobile k carrier frequency are successively designated as a center frequency of the adjustable frequency band range, and the method further comprises finding that the filtered signal generates the maximum 0758-Aj2245TWF1 (201 〇i 〇28) 53 1337345 Patent Specification No. 2_9 Amendment Revision Date: 99.12.15 Towel: Degree of the center frequency of the tunable band range of 4 degrees to distinguish the format of the disc. 2 The method for detecting light=wave frequency as described in claim 5, wherein the method further comprises: pendulum=accurate to obtain the first wobble signal, so that the first move L唬 is combined with Shannon-Nyquist Sampling theorem. 21. A method for applying a carrier frequency of a signal according to the second aspect of the patent application, wherein the reflection of the slice is known as tampering with the disk * ^ ^ ^ on both sides of the track, the method further comprises the following steps: * five swing (four) 'signal Removing the high frequency noise of the _ four wobble signal to obtain - the sixth wobble signal removes the high frequency noise of the W five wobble signal to obtain - the seventh wobble to remove the low frequency miscellaneous signal of the sixth wobble signal; Eight swings to remove the low frequency signal of the seventh swing signal; the red subtraction signal obtains a ninth swing to adjust the eighth swing signal to a suitable amplitude. The nine swing signals to the appropriate center: and the eighth eighth swing signal minus the The ninth three swing signal. Swing 6 5 tigers to obtain the third 如. For example, the method of applying the patent range 5th, the dynamic signal carrier frequency, 1 , the detection of the optical disc of the oscillating DC part of the elimination of the 0758-A32245TWFl (2〇 L〇1〇28) 54 1337345 'The patent specification of No. 96120109 amends this revision date: 99.12.15 < . The high-pass filter is implemented, and the conversion of the binary data stream is based on a ratio of Implementation. 55 0758-A32245TWF1 (20101028) 1337345 Revision of page 96120109 Revision date: 99.12.15 S S CO0 AD 3402 I 〆 3400 J 1337345 Revision of the patent specification No. 96120109 Revision period: 99.12.15 a VII. Designation of representative drawings: 鬈 (1) The representative representative of the case is: Figure I3. ' (2) The symbol of the representative figure is briefly described: 1312, 1322 ~ low pass filter; 1314, 1324 ~ high pass filter; 1316, 1326 ~ automatic gain controller; 1330 ~ subtractor; 1332 ~ anti-aliasing filter ; φ 1334 ~ DC partial elimination module; 1336 ~ two-bit conversion module; 1342 ~ adjustable band-pass filter; 1344 ~ frequency detection module; 1346 ~ optical disc format recognition module; 1320 ~ push-pull Processor; 1304~ frequency detection and optical disc format recognition module. φ VIII. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: 0758-A32245TWFK2010I028)