TWI303809B - A recording and/or reproducing apparatus and method with a signal quality determining device and method - Google Patents

Description

I3038 (^°pifd〇c IX, invention description: [Technical Field] The present invention relates to a recording and/or reproducing apparatus having a signal quality determining apparatus and a method thereof, and more particularly to determining a radio frequency taken from a disc (Radio Frequency, RF) Method and apparatus for quality of signals. [Prior Art] Binary data recorded on a disc can be reproduced by a recording and/or reproducing apparatus having the ability to receive, convert and analyze a reflected beam, for example, Converting the reflected beam from the optical disc into a signal, performing a predetermined signal processing process on the electrical signal, and regenerating the JL signal. The electrical signal converted from the reflected beam from the optical disc is called an RF signal. The characteristics of the light and the characteristics of light, even if the data recorded on the disc is binary data, the RF signal obtained from the disc is similar to the chaos. Therefore, 'this need to use a binarization process to convert this analog signal Into a binary signal. Figure 1 is a block diagram of a conventional binarization device. The conventional singularization device includes a comparator 110 and a low pass filter 130. The comparator 110 binarizes the input RF signal and outputs a binary signal based on the standard value provided by the low pass filter 130. The output semaphore signal is input to a phase locked loop (PLL) (not shown) to generate a system clock (ci〇ck). Here, the RF δίΐ 虎 tiger and the system clock Not exactly synchronous, there is a small phase difference between the RF signal and the system clock. This phase difference phenomenon is called jitter. I3038^^°pifd〇c Figure 2A and ® 2B illustrate the use of conventional The jitter that occurs during the technology. Ideally, the edge of the system clock exactly coincides with the zero crossing point of the RF signal, as shown in Figure 2A. However, in actual situations, the edge of the system clock is not related to the RF signal. The zero crossing point coincides with two, so there is obviously jitter, as shown in Figure 2B. 7 According to the known technique, the jitter value, that is, the phase difference between the RF signal and the system clock, can be used as a measure. It is used to evaluate the quality of RF signals. When the RF signal contains a lot of noise signals, the jitter value will be larger, so the jitter value can be used to know the quality of the RF signal. However, as the data recording density of the CD increases, the RF The size of the signal has become smaller. Therefore, even a small amount of noise signal will cause a large signal distortion, resulting in a larger jitter value. Moreover, as the data recording density of the optical disc increases, the RF signal is included. With more zero-crossing points, the function of the circuit for measuring the jitter value may be lost. [Invention] The invention provides a more accurate and efficient determination of the signal quality of signals in high-density optical discs with high data recording densities. Method and apparatus. The other objects of the present invention will be described in the following description, and the rest will be apparent from the description and may be learned by practicing the patent. In order to achieve the above object, the present invention provides a method for determining the quality of an RF signal, including: a signal estimator, a channel identifier, and a quality calculator. The signal estimator determines a level corresponding to the sampled value of the input RF signal based on the binary data obtained by the RF signal, and is 1303809% sparse. And generating a selection signal corresponding to the determined level; the channel identifies the crying root, selecting 峨 classifying the sampled value into a plurality of levels, and obtaining an average value of each sample value divided into each level; quality calculation The device generates a signal quality value representative of the quality of the radio frequency signal according to the average value of each sample value from each of the channel identification H and each level of the de-emphasis: the above channel identification H may include (4) average · ^, these averages The chopping H is divided into the values of each sample that are classified into each of the shirts, and the average value of each sample value classified to each level is obtained. Further, the above average chopper may include a low pass chopper. The above signal quality value may be calculated as a signal to noise ratio (SNR) according to each sample value and an average value of each sample value divided into each level; or may be based on each sample The value is an Absolute Signal to Noise Ration (ASNR) calculated from the average of each of the miscellaneous values of each margin; or it can be based on each sample value and age to each The average value of each sampled value is calculated as a peak absolute signal-to-noise ratio (ρ^

Signal to Noise Ration, PASNR). The above binary data can also be obtained by the RF signal passing through the Viterbi decoding process. In order to achieve the above and/or other objects, the present invention provides a method for determining the quality of an input radio frequency signal 'including: determining a level corresponding to a sample value of the radio frequency signal based on binary data obtained from the radio frequency signal and generating - the signal should be applied to the scale of the mosquito; the sampled value is divided into multiple levels according to the selection signal, and the average value of each sample value is obtained; and the root county is classified into each I30380. The average of each sample value in the ^°pifdoc level calculates a signal quality value that represents the quality of the RF signal. Similarly, the signal quality value in the above method may be a signal-to-noise ratio (SNR) calculated from each sample value and an average value of each sample value divided into each level; or may be one according to each The absolute signal-to-noise ratio (A SNR) calculated from the average of each sampled value and the average of each sampled value divided into each level; or a single one based on each sampled value and divided into each level The peak absolute signal-to-noise ratio (PASNR) calculated from the average of the sampled values. In order to achieve the above and/or other objects, the present invention provides an apparatus for determining the quality of a radio frequency signal, comprising a signal estimator and a quality calculator. The signal estimator receives the binary data of the RF signal and estimates a value of the RF signal; the quality calculator receives the estimated value of the RF signal and calculates a signal quality value representative of the quality of the RF signal. The signal estimator described above may include a predetermined type of Finite Impulse Response (FIR) filter. In addition, the above §fL quality value may be an SNR calculated according to the RF signal and its estimated value; or may be an ASNR calculated according to the RF signal and its estimated value; or may be a RF based The calculated PASNR of the signal and its estimate. In order to achieve the above and/or other objects, the present invention provides a method for determining the quality of an RF signal, comprising: obtaining an estimate of the RF signal based on the binary data of the RF signal, and using the RF signal and its estimate to represent the RF. Signal quality value of the signal quality. The method for obtaining the estimated value of the RF signal described in I303809^fd〇c can include using a predetermined type of FIR filter and wave filter. The above signal quality value may be a sensation according to the _ signal and its estimated value (4) view, or may be = solid according to __ and its estimated value obtained by calculation of asnr; The signal and its estimated value are calculated. To achieve the above and/or other purposes, the present invention provides a recording and reproducing apparatus, comprising: a signal detecting unit for generating a radio frequency nickname representing the media luxury hole 2, A method according to various embodiments of the present invention, and a processing unit for recording a message to the media and/or reproducing a message from the media. The above recording and/or reproducing apparatus may further comprise a processor for performing one or more of the following processing with the signal quality value: focus compensation = compensation, deviation from the tracking compensation and/or recording signal Optimization. The self-interview achieves the above and/or other objects, and the present invention provides a method for recording information on a medium and/or reproducing a message from a medium, including: generating a radio frequency signal of a 2-body message, in accordance with various implementations of the present invention As described in the example, the frequency quality determination method determines the quality of the axis, and records the nickname in the media and/or regenerates the message from the media. The method further includes performing the following processing, species or evening focus compensation, tilt compensation, deviation, or recording signal optimization based on the nickname quality value. Only /, for the above and other purposes of the present invention, The features and advantages will be more apparent. The preferred embodiment will be described below, and the detailed description will be made as follows. Ι3038Θ^〇ρί^〇〇[Embodiment] FIG. 3 is a block diagram of a signal quality determining device. It expresses an embodiment of the present invention. Referring to Figure 3, such signal quality determining means includes a signal estimator 310, a channel identifier mo and a quality calculator 350. 'To utilize various other binarization devices For example, the limiter 770 # output signal shown in Figure 8 can also be used as an input to the signal estimator 31(). The signal estimator 310 includes a plurality of delay units 311 to 315 and a signal estimator 310 to receive the binary. Data, which is obtained by binarizing the RF signal according to a predetermined method. To obtain high quality binary data, a Viterbi decoder 57 can be used. The output is shown in Figure 6. That is, the binary data obtained by the Viterbi decoding process of the RF signal can be used as the input signal of the signal estimator 31. However, it is used as the input of the signal estimator 31〇. Binary data can also delay units 311 through 315 for delayed input

The signal generator 317 is selected. The binary data of the delay: the delay selection signal generator 317 generates the control channel identifier 330. The binary value of I30380^°pifd〇c 311~315 is used to determine the level corresponding to each sample value of the RF signal, generate a selection signal corresponding to the determined level' and provide the selection signal to the channel. The recognizer 33〇. That is, the signal estimator 310 is operative to determine a level value that corresponds to the sampled value of the RF signal from the delay unit 333. Moreover, the signal estimator 310 also generates a selection signal corresponding to this level. The switch 339 feeds the RF signal sample value from the delay unit 333 to the corresponding one of the averaging filters 334 to 338 based on the above selection signal.

The averaging filters 334 338 338 generate a level output signal 〇 to a level output number m. These level output signals are the average of the respective sample values of the radio frequency 分类 classified into each level. Each of the averaging filters 334-338 can be implemented with a low pass filter. Equation 1 is an example of how to calculate one of the values of the level output signal 〇 to the level output signal m. Formula 1: Previous Quasi = Previous Fresh + (Section (4) Input Penalty

The larger the constant in Equation 1, the amount of change t in the level after the update. The level after the update is slowly dependent on the transferor calculated using Equation 1 to: -; can improve the - item of the transcode n. The decoding benefit selection switch 34G rushes ...5 from the selection signal generator 317 7 to the level output signal 0 to the bit ψ 1 _ , ' - the output message #bm is fed to the product. The mother level output signals are from the average filter; 12 I30380^〇pifdoc 334~338. Because of the level output =, the RF signal that is classified into the noise-removed signal is the signal that is output from the level to the level. Therefore, the quality calculator 35〇 needs to calculate the RF signal quality, the - sample value of the frequency signal and the estimated value of the hearing sample value.

^ The estimated value is one of the level output signal G to the level output signal ^. The quality value of the '^2A RF signal represents the quality of the RF signal. The quality meter 350 can be used to calculate the quality of the number of the squares. For example, the quality value of the number can be expressed by a signal-to-noise ratio (SNr), which is the value between the power of the ideal signal and the power of the noise signal, as shown in Equation 2. Ratio 2: SNR = sum of the squares of the ideal signals / the sum of the squares of the noise signals. In Equation 2, the ideal signal represents the estimated value of the signal, such as the level 0 signal to the level output signal m. One; the alpha sang horn corresponds to the difference between the §fl estimator and the actual RF signal sample value. Since Equation 2 contains a square operation, the hardware required to perform the squaring operation is larger. And complicated. Therefore, the peak signal of the RF signal can be used instead of the ideal signal in Equation 2. Since the peak value of the RF signal rarely changes, there is virtually no need to calculate the peak amplitude value for each sample value. Therefore, a large amount of hardware or 13 130380940^^ time is not actually required. Thus, the PSNR can be used as the quality value of the signal, as shown in Equation 3. Equation 3: PSNR = sum of the squares of the peak amplitudes of the input signals / the sum of the squares of the noise signals. The input signal in Equation 3 represents the RF signal, which has the additional input to the quality calculator for the input signal, peak amplitude. The maximum and minimum values of the signal ^. In the embodiment shown in Fig. 3, the value assigned to the level 是 is the minimum value, and the value assigned to the level m is the maximum value. Similarly, the PASNR calculated using only the absolute value of the ideal signal and the absolute value of the noise signal or the absolute value of the peak amplitude of the input signal and the absolute value of the noise signal can also be used as the quality value of the signal. . In this case, since no multiplication operation is required, only a small amount of hardware is required, and the operation time is also reduced. ASNR and PASNR are expressed by Equation 4 and Equation 5, respectively, below. Equation 4: ASNR = sum of absolute values of ideal signals / sum of absolute values of noise signals Equation 5: PASNR = sum of absolute values of peak amplitudes of input signals / sum of absolute values of arpeggio signals SNR is usually in decibels (dB) The unit is used to express its value, which is a unit of logarithmic type. When a large value appears, this value is usually converted to decibels (dB) by 30380^〇ρ^. Therefore, if Equations 2 to 5 are expressed in decibels (dB), they become the following Equations 6 to 9. Equation 6: SNR=101〇g1G (sum of squares of ideal signals/square of noise signal) Equation 7: PSNR=1〇l〇gio (sum of the square of the peak amplitude of the input signal/sum of the square of the noise signal Equation 8: · ASNR = 101〇g 1〇 (sum of the absolute value of the ideal signal / the sum of the absolute values of the noise signal) Equation 9: . PASNR = 1 〇l〇gl() (absolute of the peak amplitude of the input signal) The sum of the values / the sum of the absolute values of the noise signals. As shown in Equations 3, 5, 7, and 9, the peak amplitude of the input signal is first obtained. In the embodiment shown in Fig. 3, the level 〇 and level m are also input to the quality calculator 350 in order to calculate the peak amplitude of the input signal. Figure 4 is a block diagram of a signal quality determining apparatus which expresses another embodiment of the present invention. Referring to Fig. 4, the signal quality determining apparatus in the figure may include a maximum/minimum value calculator 41, a plurality of delay units 420 to 440, a signal estimator 450, and a quality calculation cry 460. The number estimator 450 receives the binary data obtained by binarization of the RF signal using some predetermined method. In order to obtain high-quality binary data, the & 15 130380940^° signal of the Viterbi decoder 57 shown in Fig. 6 can be used. That is to say, the binary data obtained by the Viterbi decoding process of the RF signal can be used as the input signal of the signal estimator 450. However, the binary data input to the signal estimator 450 can also be obtained using it: various binarization devices. For example, the output signal of the limiter 77A shown in Fig. 8 can also be used as the input signal of the signal estimator 450. The signal estimator 450 uses the binary data to obtain an estimated RF signal and outputs it to the quality calculator 460. The signal estimator 450 can be constructed with a finite pulse wave response (FIR) filter. It is well known that, depending on the type of the RF signal, the binary data is input to a predetermined type of FIR filter to obtain an estimated RF signal having a plurality of levels. Fig. 5 is an example of an FIR filter. Referring to Fig. 5, the FIR filter state includes a plurality of delay units 451 to 453, a plurality of multipliers 454 to 457, and an adder 458. Delay units 451 through 453 delay binary input signals in a system clock unit. The constant a1 of the multipliers 454 to 457 is a real number such as 0. Adder 458 is used to sum the outputs of multipliers 454-457. The number of delay units, the number of multipliers, and the constants a1 to an of the plurality of multipliers 454 to 457 can be determined according to the code type of the RF signal. Referring to Figure 4, a plurality of delay units 420-440 synchronize the estimated RF signals from signal estimator 450 with the actual RF signals. The quality calculator 460 calculates the RF signal of the 16 I3O380 based on the estimated radio frequency signal from the signal estimator 450 and the actual radio frequency signal synchronized with the estimated radio frequency signal, and using one of the formulas 2-9. °pifd〇c Quality value. The peak amplitude of the input signal is first obtained according to Equations 3, 5, 7, and 9. In the signal quality determining apparatus shown in Fig. 4, the maximum/minimum value calculator 410 is used to calculate the maximum value and the minimum value of the radio frequency signal, and the calculated maximum value and minimum value are input to the quality calculator 460. If the formula other than Equations 3, 5, 7, and 9 is used to calculate the quality value of the RF signal, the maximum/minimum calculator 410 is not required. Figure 6 is a block diagram of a binary data detecting apparatus which expresses an embodiment of the present invention. This binary data detecting means includes a signal quality determining means 590. Referring to FIG. 6, the binary data detecting apparatus may include an analog-to-digital converter (anal〇g_t〇_digi thief ADC) 510, a direct current (DC) offset compensator 53 (), and an adaptive FIR filter. The device 550, a Viterbi decoder 57A, and a signal quality determining device 590. The ADC 51G samples the RF signal according to a predetermined period and outputs the sampled RF signal. A direct current (DC) offset compensator 53 receives the sampled RF signal of the ADC 510 and compensates for a yoke

The special depletion device 570 is matched. Viterbi decoder 570 is based on radio frequency signal data. From the blank bottle _ According to the statistical characteristics of the (3) signal, the level value produces the binary number thus generated. 17 I30380^〇pif.doc The signal quality determining device shown in Figure 3 or Figure 4 can be used as Figure 6 The signal quality determining device 590. However, in this circuit layout, since the Viterbi decoder 570 requires an optimum level value, in order to improve the quality of the reproduced signal, it is preferable to use the signal quality decision device shown in Fig. 3. Figure 7 shows another embodiment of the invention. This is a block diagram of a binary data detection device that includes a signal quality determining device 690. In the binary data detecting apparatus shown in FIG. 7, since the channel characteristic of the signal from the matching FIR filter 650 can be considered to be fixed, in this circuit layout, it is preferable to use FIG. The signal quality determining device is used as the signal quality determining device 69 instead of the signal quality determining device shown in FIG. However, if the signal quality determining device shown in FIG. 3 is used, it is also possible to obtain an optimum level value by using the signal quality determining device and input the optimal level value to the Viterbi decoder, so that the most Good performance. Figure 8 illustrates another embodiment of the invention. This is a block diagram of a binary data detection device that includes a signal quality determining device 790. This binary data detecting device does not use a Viterbi decoder, which uses another binarization device to detect binary data. Depending on the code status of the binary signal, a simple slicer that can identify the RF signal symbol can be used as a binarization device, or an operation length correction with a circuit architecture that can eliminate binary signals that are not suitable for a certain code state can be used. As a binarization device. The binary data detecting apparatus shown in Fig. 8 employs a divider 770. I3038094〇pifd〇c The value of the frequency signal is more accurate in the binary data detection and display in Figure 8. Therefore, the signal quality determined by the signal quality shown in Figure 3 is determined. , °, take the good quality control device can also be used. ",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The quality of the extended RF signal can be used for the block diagram of [9] (10) device. See figure!, the second is - a read head (piekup), a control list / 2 ==

Recalling body 3. Record/read generation] 0 1U Reproduces the data on the disc 10. * The various embodiments of the record record /, I use a quality calculation number representing the quality of the RF signal and ==^ focus compensation, tilt compensation, off-track compensation, to ί ft5 tiger's dare, such as 'in the figure These processes can be performed in the recording and/or reproducing apparatus shown in FIG. ^ 补射_下财县Execution: Face-to-ship computer measurement The quality of the signal obtained by ^ different focus positions, and the focus is adjusted to a position where the best quality can be obtained. Tilt compensation, off-track compensation, and optimization of recorded signals can all be performed in a similar manner. Moreover, if a method of determining the quality of the RF signal using the absolute value of the RF signal and the absolute value of the RF signal after the evaluation is used, only a small amount of hardware and a simple calculation process are required. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention to the invention, and it is possible to make some changes without departing from the spirit and scope of the invention. And the scope of the present invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a conventional binarization apparatus. 2A and 2B are diagrams for explaining the jitter generated by the use of the conventional technique. Fig. 3 is a block diagram of a signal quality determining apparatus for expressing an embodiment of the invention. 4 is a block diagram of a signal quality determining apparatus for illustrating another embodiment of the invention. Figure 5 is one example of a finite pulse wave response (FIR) filter. A block diagram of a binary data set containing a signal quality decision is used to express an embodiment of the present invention. Figure 7 is a block diagram of a signal-detecting device for detecting a hair quality, and the other data representing the present invention is shown in Figure 8 as a test for the quality of the signal. _又—_Example structure=图疋. [Main component symbol description] of the recording and/or reproducing device of the present invention (4) 110: Comparator 130: low-pass filter 310, 450 • Signal estimator 20 13 03 80 points 0pif d〇c 311 ～ 315, 331 to 333, 420 to 440, 451 to 453: delay single 317: selection signal generator generator 330: channel identifiers 334 to 338: averaging filters 339, 340 · · switches 350, 460: quality calculator 410: maximum /minimum calculators 454 to 457: multiplier 458: adders 510, 610, 710: analog-to-digital converters 530, 630, 730: DC offset compensators 550, 650: adaptive finite pulse response filter 570 670 · Viterbi decoder 590, 690, 790: signal quality determining device 750: finite pulse wave response filter 770: divider 1: recording/reading unit 2: control unit 3: memory 10: optical disk 21

Claims (1)

!3〇38〇9 Amendment of this amendment date: August 15, 1997 X. Patent application scope: 1. A radio frequency signal quality decision device, including: - Signal evaluation n, with the record from - RF Miyazaki Determining a level corresponding to a sampled value of the input RF signal, and generating a selection signal corresponding to the determined level; a channel identifier for classifying the sampled value according to the selection signal to the evening Leveling, and obtaining each of the average values classified to each level; and t-quality calculator for each sample value outputted by the channel identifier and each sample value classified to each level The average value is calculated as a signal quality value representing the quality of the RF signal. 2. The radio frequency signal quality determining apparatus according to claim 1, wherein the channel identifier comprises a plurality of averaging filters and waves, and the averaging filters are respectively configured to receive the samples classified to the respective standards. The value, and the average value of each sample value classified to each other is obtained. 3. The RF signal quality determining device of claim 2, wherein the averaging filter comprises a low pass filter. 4. The radio frequency signal quality determining apparatus according to claim 1, wherein the signal quality value is a signal noise calculated according to an average value of each sampled value and the sampled values classified to each other. (RF) 〇 5. The radio frequency signal quality determining apparatus according to claim 1, wherein the signal quality value is calculated based on each sample value and an average value of the sample values classified to each other. The resulting absolute signal to noise ratio 22 (ASNR) ο, the quality of the alkaloids described in item 1 of the A towel determines the average value of the j-value of the pen to the standard - the secret value and the classified noise ratio _NR) - the peak absolute signal, ^1 The binary data described in the radio frequency depreciation determination device described in item 1 of the scope of the towel is obtained by the radio frequency signal through the ratio decoding process. And a method for determining the quality of the signal of the RF signal, comprising: determining a level corresponding to a sample value of the RF signal based on the binary data obtained from the RF signal, and generating a corresponding bit corresponding to the determined value a quasi-selection signal; classifying the sampled values into a plurality of levels according to the selection signal, and obtaining an average value of each sampled value classified to each level; and according to each sampled value and the ones classified to each level The average of the sampled values calculates a signal quality value that represents the quality of the RF signal. 9. The method for determining the signal quality of an input RF signal as described in claim 8 of the patent application, wherein the signal quality value is calculated based on each sampled value and an average value of the sampled values classified to the respective standards. A signal to noise ratio (SNR). 10. The method for determining the signal quality of an input RF signal as described in claim 8 of the patent application, wherein the signal quality value is calculated based on each sampled value and an average of the sampled values classified to the respective standards. An absolute signal to noise ratio (ASNR). 23 13〇3靴_ 〕 • ' ' . ; ; i Π · The method of determining the signal quality of the input RF signal as described in item 8 of the patent application, wherein the signal quality value is based on each sample value and A peak-to-peak absolute signal-to-noise ratio (PASNR) calculated from the average of these sampled values. 12. The method of determining the quality of an input RF signal as recited in claim 8 wherein said binary data is obtained by said Viterbi decoding process. 13. The RF signal quality determining device comprises: a signal estimator for receiving binary data of an RF signal and estimating a value of the RF signal; and a maximum/minimum calculator receiving the RF And calculating a maximum value and a minimum value of the RF signal; and a quality calculator for receiving the estimated value of the RF signal, the RF signal, and the maximum value of the RF signal The minimum value of the radio frequency signal, and using the estimated value of the radio frequency signal, the radio frequency signal, the maximum value of the radio frequency signal, and the minimum value of the radio frequency signal to calculate the representative radio frequency signal The quality of a signal quality value. 14. The RF signal quality determining apparatus of claim 13, wherein the signal estimator comprises a predetermined type of finite impulse response (FIR) filter. The RF signal quality determining device according to claim 13, wherein the signal quality value is a signal-to-noise ratio (SNR) calculated according to the estimated value of the RF signal and the RF signal. ). 24 16 . The RF signal quality determining device according to claim 13 , wherein the signal quality value is an absolute signal calculated according to the estimated value of the RF signal and the RF signal. The radio frequency signal quality determining apparatus according to claim 13, wherein the signal quality value is calculated based on the estimated value of the radio frequency signal and the radio frequency signal. The peak signal-to-noise ratio (PASNR) 〇18. The radio frequency signal quality determining apparatus according to claim 13, wherein the binary data is obtained by the Viterbi decoding process by the radio frequency signal. A method for determining a signal quality of an RF signal, comprising: obtaining an estimated value of the RF signal according to binary data of the RF signal; calculating a maximum value and a minimum value of the RF signal; The estimated value, the RF signal, the maximum value of the RF signal, and the minimum value of the RF signal to calculate a signal quality value representative of the quality of the RF signal. 20. The method of determining the signal quality of an RF signal as described in claim 19, wherein the method for obtaining an estimate of the RF signal comprises using a predetermined type of finite pulse wave response (F1R) filter to obtain Estimated value of the RF signal. 21. The method for determining the signal quality of an RF signal according to claim 19, wherein the signal quality value is calculated according to the estimated value of the 25 Ι3_ϋ 2 page signal and the RF signal. A signal-to-noise ratio 〇 22. The method for determining the signal quality of an RF signal according to claim 19, wherein the signal quality value is based on the estimated value of the RF signal and the RF signal Calculate the resulting absolute pass ratio (ASNR). "本口口23. The method for determining the signal quality of an RF signal as described in claim 19, wherein the signal quality value is calculated based on the estimated value of the RF signal and the RF signal. The resulting one is the absolute signal to noise ratio (PASNR). 24. The method of determining the quality of an RF signal as recited in claim 19, wherein said binary data is obtained by said Vit. A recording and/or reproducing device, comprising: a signal detecting unit for generating an RF signal, the RF signal being used to represent a message of a medium; and the RF signal as described in claim 1 a quality determining device; and a processing unit for recording messages to the media and/or reproducing messages from the media. 26. The recording and/or reproducing apparatus of claim 25, further comprising a processor for performing one or more of the following processing based on the signal quality value: focus compensation, tilt compensation, offset deviation compensation And / or record the optimization of the signal. 26 27·- Recording and/or reproducing device, comprising: - a signal detecting unit for generating a - shooting signal, the RF signal is used to represent a message of a medium; - a radio frequency as claimed in claim 13 The signal quality determining device; and the processing unit 7G' is used to record messages in Wei and/or regenerate messages from the media. 28. The recording and/or reproducing apparatus of claim 27, further comprising a processor for performing one or more of the following processing based on the signal quality value: focus compensation, tilt compensation, off-track Optimization of compensation and / or recording signals. 29. A method of recording information in a medium and/or reproducing a message from a media, comprising: generating an RF signal, the RF signal being used to represent a message of the media; using a method as described in claim 8 Determining the signal quality of the input RF signal to determine the signal quality of the input RF signal; and, recording the message to the media and/or reproducing the message from the media. 30. The method for recording information in the media and/or reproducing information from the media as described in claim 29 of the patent application scope, and further comprising performing one or more of the following processing according to the signal quality value: · focus compensation, tilt compensation, Deviation from the pursuit of compensation and / or recording signal optimization. 31. Record the information as described in item 29 of the patent application on the media and / 27 Or a method of reproducing a message from a medium, wherein the signal quality value is an absolute signal to noise ratio (ASNR), and the calculation of the absolute signal to noise ratio (ASNR) is limited to using the absolute value of each sample value and is classified into each The average of each sampled value. 32. A method of recording information in a medium and/or reproducing a message from a media, comprising: generating an RF signal for representing a message of the media; using a decision as set forth in claim 19 of the scope of the patent application The signal quality of the RF signal determines the signal quality of the input RF signal; and records the message to the media and/or regenerates the message from the media. 33. The method of recording information in a medium and/or reproducing a message from a media as described in claim 32 of the patent application, further comprising performing one or more of the following processing according to the signal quality value: focus compensation, tilt compensation Off-track compensation and/or optimization of recorded signals. 34. A method of recording information in a medium and/or reproducing a message from a medium as recited in claim 32, wherein the signal quality value is an absolute signal to noise ratio (ASNR) and the absolute signal to noise ratio (ASNR) The calculation is limited to using the absolute value of each sampled value and the average of each sampled value classified to each level. 28