CN100543850C - Detect the object wave peak value of input signal and the apparatus and method of object wave valley - Google Patents
Detect the object wave peak value of input signal and the apparatus and method of object wave valley Download PDFInfo
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Abstract
The invention provides a kind of apparatus and method that detect the object wave peak value and the object wave valley of input signal.This device includes a testing circuit and a decision logic circuit.This testing circuit is coupled to this input signal, is used for detecting in a period object wave peak value and an object wave valley of this input signal, and wherein this period is not less than the one-period of a reference signal that is produced via this optical storage media of access.This decision logic circuit is coupled to this testing circuit, is used for determining one with reference to accurate position according to this object wave peak value and this object wave valley.The present invention can during with respect to the counter-rotating of the moving direction of discs, prevent to cause incorrect image signal at optical read/write head.
Description
Technical field
The present invention is relevant for handling the signal that optical read/write head produced, especially a kind of foundation of finger is followed rail zero and is handed over (tracking zero-cross more, TZC) (radio frequency ripple, RFRP) signal produces one and is used for cutting this rf chain ripple signal to produce the apparatus and method of cutting the accurate position of ripple (slicer level) of mirror image (mirror) signal signal Processing rf chain ripple.
Background technology
Discs has become the Storage Media that generally uses now, when discs that access is inserted (be about to data write to discs or from the discs reading of data), CD-ROM drive must move to optical read/write head one target track, generally speaking, the servo-drive system in the CD-ROM drive need be responsible for activating existing jumping onto the tracks (also being referred to as to seek rail) to find the track that corresponds to the target track numbering.Image signal with follow these two signals of rail zero-crossing signal often by servo-drive system the reference operation finishing to jump onto the tracks, and image signal (also is referred to as radio frequency zero and hands over (RF zero-crossing more, RFZC) signal) via utilizing the accurate position cutting of one section ripple one rf chain ripple signal to be produced, and follow the rail zero-crossing signal by a magnetic hysteresis (hysteresis) processing of circuit tracking error (tracking error, TE) signal is produced, because it is known by industry to produce the details of operation that follows rail zero-crossing signal and rf chain ripple signal, further instruction is not just given unnecessary details in addition at this.Under jumping out of rail mode, follow the moving direction that phase relation between rail zero-crossing signal and the image signal is used to refer to optical read/write head, the cycle length of following rail zero-crossing signal or image signal is then pointed out the translational speed of optical read/write head.
As mentioned above, cutting the accurate position of ripple must suitably set so that obtain image signal accurately, owing to rf chain ripple signal can be followed change along with optical read/write head moves in the discs radial direction, cut rf chain ripple signal if use the fixing accurate position of ripple of cutting, then will produce the image signal of a mistake, so, just need dynamically to set the accurate position of section ripple.Generally speaking, because the phase differential between rf chain ripple signal and the tracking error signal equals 90 degree haply, therefore follow the rail zero-crossing signal and just cut the accurate position of ripple so that produce desired image signal with deciding, in a conventional practice, cutting the accurate position of ripple produces via following steps and upgrades: obtain one first amplitude at each positive edge (rising edge) sampling rf chain ripple signal that follows the rail zero-crossing signal, obtain one second amplitude at each negative edge (falling edge) sampling rf chain ripple signal that follows the rail zero-crossing signal, follow the sampling value at average corresponding adjacent signals edge and upgrade the accurate position of section ripple.For instance, each the positive edge that follows the rail zero-crossing signal be used for taking a sample crest value (peak value) of rf chain ripple signal, each the negative edge that follows the rail zero-crossing signal then be used for taking a sample trough value (bottom value) of rf chain ripple signal, yet, optical read/write head can be because disc off-centre (disc eccentric) or cause optical read/write head to exceed target track because putting on the driving force of optical read/write head and reverse with respect to the moving direction of discs, thus, the amplitude of taking a sample in each the positive edge that follows the rail zero-crossing signal just becomes the trough value, in addition, the amplitude of taking a sample in each the negative edge that follows the rail zero-crossing signal then becomes crest value, significantly, when optical read/write head during with respect to the counter-rotating of the moving direction of discs, can obtain two continuous crest values or two continuous trough values in the adjacent signals edge, so, the step of the sampling value at above-mentioned average corresponding adjacent signals edge may produce the accurate position of wrong section ripple, thereby causes incorrect image signal.
Summary of the invention
Therefore, an object wave peak value that the input signal (for example rf chain ripple signal) of taking a sample in the one-period that one of purpose of the present invention is to provide a kind of utilization to be not less than reference signal (for example following the rail zero-crossing signal) is produced and an object wave valley decide the apparatus and method with reference to accurate position (for example cutting accurate of ripple), to address the above problem.
According to claim of the present invention, it discloses a kind of device of handling an input signal that is produced via access one optical storage media.This device includes: a testing circuit, be coupled to this input signal, be used for detecting in a period object wave peak value and an object wave valley of this input signal, wherein this period is not less than the one-period of a reference signal that is produced via this optical storage media of access; And a decision logic circuit, be coupled to this testing circuit, be used for determining one with reference to accurate position according to this object wave peak value and this object wave valley.
According to claim of the present invention, it discloses a kind of method of handling an input signal that is produced via access one optical storage media.This method includes: detect an object wave peak value and an object wave valley of this input signal in a period, wherein this period is not less than the one-period of a reference signal that is produced via this optical storage media of access; And determine one with reference to accurate position according to this object wave peak value and this object wave valley.
The present invention can during with respect to the counter-rotating of the moving direction of discs, prevent to cause incorrect image signal at optical read/write head.
Description of drawings
Fig. 1 is for deciding the accurate position of a reference and using the reference standard position that is determined to handle the function block schematic diagram of the device of this input signal according to an input signal and a reference signal.
The sequential chart of a reference accurate position Lref that Fig. 2 is shown in Figure 1 for the present invention produces and the embodiment of section ripple signal Sout.
Fig. 3 is the operation chart of an embodiment of protection mechanism of the present invention.
Fig. 4 handles the process flow diagram of rf chain ripple signal with an embodiment of generation image signal for the present invention.
The primary clustering symbol description:
5100: device
5102: Hi-pass filter
5104: testing circuit
5106: the decision logic circuit
5108: update controller
5110: holding circuit
5112: initial value controller
5114: comparer
5122: the edge-triggered device
5124: peak detector
5126: the valley detection device
5128: snubber assembly
5130: treatment circuit
5132: maximal value decision unit
5134: minimum value decision unit
Embodiment
In the middle of instructions and claim, used some vocabulary to censure specific assembly.The person with usual knowledge in their respective areas should understand, and hardware manufacturer may be called same assembly with different nouns.This specification and claims are not used as distinguishing the mode of assembly with the difference of title, but the criterion that is used as distinguishing with the difference of assembly on function.Be an open term mentioned " comprising " in the middle of instructions and the follow-up request item in the whole text, so should be construed to " comprise but be not limited to ".In addition, " couple " speech and comprise any indirect means that are electrically connected that directly reach at this.Therefore, be coupled to one second device, then represent this first device can directly be electrically connected in this second device, or be electrically connected to this second device indirectly through other device or connection means if describe one first device in the literary composition.
See also Fig. 1, Fig. 1 is for deciding an accurate position of reference (level) and using the reference standard position that is determined to handle the function block schematic diagram of the device 5100 of this input signal according to an input signal and a reference signal.In present embodiment, device 5100 is designed to operate in numeric field (digital domain), promptly installing 5100 is a digital circuit, yet, this is not to be restrictive condition of the present invention, after reading follow-up technology contents explanation, haveing the knack of this skill person should be able to recognize easily, other embodiment that meets spirit of the present invention also is feasible, in addition, in follow-up embodiment, input signal is above-mentioned rf chain ripple signal, and reference signal is the above-mentioned rail zero-crossing signal that follows, and with reference to accurate position for be used for cutting rf chain ripple signal with produce cut ripple signal (being above-mentioned image signal) cut the accurate position of ripple, similarly, these examples are not to be restrictive condition of the present invention.
As shown in Figure 1, device 5100 comprises a Hi-pass filter 5102, a testing circuit 5104, a decision logic circuit 5106, a update controller 5108, a holding circuit 5110, an initial value controller 5108 and a comparer 5114.Hi-pass filter 5102 is used for flip-flop in the filtering input signal (for example rf chain ripple signal Sin) removing direct current offset, yet according to design requirement, Hi-pass filter 5102 is (optional) assembly optionally.Testing circuit 5104 designs detect object wave peak value and the object wave valley of rf chain ripple signal Sin at least one cycle of reference signal (for example following the rail zero-crossing signal) Sref, for instance, in present embodiment, testing circuit 5104 detects crest value and trough value in each cycle of following rail zero-crossing signal Sref.
As shown in Figure 1, testing circuit 5104 includes an edge trigger (edge trigger) 5122, one peak detector 5124, a valley detection device 5126, a snubber assembly 5128 and a treatment circuit 5130.Edge-triggered device 5122 receives and follows rail zero-crossing signal Sref, then determine a crest value and a trough value respectively with valley detection device 5126 at each the edge-triggered peak detector 5124 that follows rail zero-crossing signal Sref, with peak detector 5124 is example, its one first edge in following rail zero-crossing signal Sref is triggered, just search a crest value then between one second edge after this first edge and this first edge, so when peak detector 5124 was triggered because following second edge among the rail zero-crossing signal Sref, peak detector 5124 just can be output in the crest value that is found in period between this first edge and this second edge; In addition, valley detection device 5126 has the trough value of similar operations to be found in the period that is output in the two adjacent edge edge that follow rail zero-crossing signal Sref.Institute is known as industry, following each cycle of rail zero-crossing signal Sref represents discs in a track space (trackpitch) that directly makes progress, so in the operating process of jumping onto the tracks, following the generation at each edge among the rail zero-crossing signal Sref just indicates optical read/write head to move the track space of half, in other words, every half track space, peak detector 5124 and valley detection device 5126 are triggered owing to the positive edge that follows rail zero-crossing signal Sref and negative edge and export a crest value and a trough value.Snubber assembly 5128 can use any volatility or non-volatile storage assembly to do in fact.
In one embodiment of the invention, testing circuit 5104 designs an object wave peak value and an object wave valley (the mobile window (moving window) of promptly monitoring the amplitude size of rf chain ripple signal Sin is defined as the one-period that follows rail zero-crossing signal Sref) that detects rf chain ripple signal Sin in the one-period of following rail zero-crossing signal Sref, and two impact dampers are arranged in the buffer circuit 5128 to write down respectively according to previous previous crest value PRE_MAX that the edge was obtained that follows rail zero-crossing signal Sref and previous trough value PRE_MIN, in addition, other has two impact dampers to be arranged in the buffer circuit 5128 with record respectively according to following the present crest value CUR_MAX that present edge was obtained that is positioned among the rail zero-crossing signal Sref after the previous edge and trough value CUR_MIN at present.Treatment circuit 5130 is coupled to snubber assembly 5128 to decide object wave peak value VMAX according to present crest value CUR_MAX and previous crest value PRE_MAX, and according to trough value CUR_MIN and previous trough value PRE_MIN decide object wave valley VMIN at present, as shown in Figure 1, treatment circuit 5130 includes maximal value decision unit 5132 and minimum value decision unit 5134, wherein 5132 designs of maximal value decision unit are used as an object wave peak value VMAX from selecting a maximal value among present crest value CUR_MAX and the previous crest value PRE_MAX, and 5134 designs of minimum value decision unit are used as an object wave valley VMIN from selecting a minimum value among present trough value CUR_MIN and the previous trough value PRE_MIN, and above-mentioned computing can be represented with following formula:
VMAX＝max(CUR_MAX，PRE_MAX) (1)
VMIN＝min(CUR_MIN，PRE_MIN) (2)
Yet, in another embodiment of the present invention, testing circuit 5104 designs are next, and (N is greater than 1 in N the cycle following rail zero-crossing signal Sref, for example greater than 1 integer) in detect object wave peak value and the object wave valley (the mobile window (moving window) of promptly monitoring the amplitude size of rf chain ripple signal Sin is defined as N the cycle following rail zero-crossing signal Sref) of rf chain ripple signal Sin, and (2N-2) individual impact damper is arranged in the buffer circuit 5128 to write down the individual previous crest value PRE_MAX of previous (N-1) (N-1) that individual continuous boundary was obtained that foundation is followed rail zero-crossing signal Sref respectively
1..., PRE_MAX
N-1With (N-1) individual previous trough value PRE_MIN
1..., PRE_MIN
N-1, in addition, other has two impact dampers to be arranged in the buffer circuit 5128 with record respectively according to following the present crest value CUR_MAX that present edge was obtained that is positioned among the rail zero-crossing signal Sref after previous (N-1) individual edge and trough value CUR_MIN at present.5132 designs of maximal value decision unit come from present crest value CUR_MAX and (N-1) individual previous crest value PRE_MAX
1..., PRE_MAX
N-1In select a maximal value and be used as an object wave peak value VMAX, and 5134 designs of minimum value decision unit come from present trough value CUR_MIN and (N-1) individual previous trough value PRE_MIN
1..., PRE_MIN
N-1In select a minimum value and be used as an object wave valley VMIN, and above-mentioned computing can be represented with following formula:
VMAX＝max(PRE_MAX
1，PRE_MAX
2，...，PRE_MAX
n-1，CUR_MAX)(3)
VMIN＝min(PRE_MIN
1，PRE_MIN
2，...，PRE_MIN
n-1，CUR_MIN)(4)
Note that the foregoing description only as the usefulness of example explanation, is not to be used as restrictive condition of the present invention.Then, decision logic circuit 5106 just brings into operation to decide one according to received object wave peak value VMAX and object wave valley VMIN with reference to accurate position (for example accurate position of section ripple of rf chain ripple signal) Lref, in this embodiment, decision logic circuit 5106 is obtained with reference to accurate position Lref via average criterion crest value VMAX and object wave valley VMIN, and is as follows:
Lref＝(VMAX+VMIN)/2 (5)
Please note, because being used for monitoring the mobile window of the amplitude size of rf chain ripple signal can ceaselessly move along with the time, therefore when the corresponding new object wave peak value VMAX that follows next edge in the rail zero-crossing signal had been exported by treatment circuit 5130 with object wave valley VMIN, a present reference standard Lref will upgrade thereupon.After producing with reference to accurate position Lref, comparer 5114 just as a chopper cutting rf chain ripple signal with rf chain ripple signal via relatively cutting the accurate position of ripple Lref, and output section ripple signal Sout is with as desired image signal.
In addition, update controller 5108 is used for that bypass (bypass) decision logic circuit 5106 determined cut the accurate position of ripple Lref to comparer 5114 or the initial value Lini that directly utilizes initial value controller 5112 to be provided set desire to export to comparer 5144 cut the accurate position of ripple Lref.The example of some setting initial value Lini below will be described.
In first example of setting initial value Lini, initial value controller 5112 is directly set initial value Lini and is given update controller 5108 according to following expression formula.
Lini＝IN-(MAX-MIN)/2 (6)
In expression formula (6), IN represents rf chain ripple signal Sin at the beginning signal magnitude in the operation of jumping onto the tracks at present, the particular maximum value that on behalf of maximal value decision unit 5132, MAX exported in the operation of before jumping onto the tracks, and on behalf of minimum value, MIN determine the certain minimum that unit 5132 is exported in the operation of before jumping onto the tracks, and in a preferable setting, this particular maximum value is last object wave peak value VMAX that finds in the operation of before jumping onto the tracks, and this certain minimum is last object wave valley VMIN that finds in the operation of before jumping onto the tracks.In this example, if the above-mentioned section accurate position of ripple set the first machine-processed embodiment and is used, then when a previous crest value, a previous trough value, a present crest value and a present trough value be stored in the snubber assembly 5128, the accurate position of a section ripple Lref who is set at initial value Lini originally will be updated; On the other hand, if the above-mentioned section accurate position of ripple set the second machine-processed embodiment and is used, then when (N-1) individual previous crest value, (N-1) individual previous trough value, a present crest value and a present trough value be stored in the snubber assembly 5128, the accurate position of a section ripple Lref who originally was set at initial value Lini will be updated.
In second example of setting initial value Lini, initial value controller 5112 is coupled to snubber assembly 5128, and be used for controlling the initial value that cuts the accurate position of ripple Lref, and initial value controller 5112 is via one first predetermined value, one second predetermined value, corresponding certain minimum of a particular maximum value (for example above-mentioned MAX) (for example above-mentioned MIN) in the operation of before having jumped onto the tracks and rf chain ripple signal Sin with one in the operation of jumping onto the tracks at present at the beginning the time signal magnitude (for example above-mentioned IN) directly set an initially present crest value, one initial previous crest value, an one initial trough value at present and an initial previous trough value are cut the initial value of the accurate position of ripple Lref with control.In this example, initial value controller 5112 is set IN-(MAX-MIN) and is given initial trough value at present, IN gives initial crest value at present, first predetermined value gives initial previous crest value and second predetermined value is given initial previous trough value, and in a preferable setting, this particular maximum value MAX is last object wave peak value VMAX that finds in the operation of before jumping onto the tracks, and this certain minimum is last object wave valley VMIN that finds in the operation of before jumping onto the tracks, in addition, this first predetermined value can be set to any number of the minimum value in all possible trough value that is less than or equal to rf chain ripple signal or be set at last minimum value that finds (being MIN) in the operation of before jumping onto the tracks, and this second predetermined value can be set to more than or equal to the peaked any number in all possible crest value of rf chain ripple signal or be set at last maximal value that finds (being MAX) in the operation of before jumping onto the tracks.
In the 3rd example of setting initial value Lini, initial value controller 5112 is coupled to snubber assembly 5128, and be used for controlling the initial value that cuts the accurate position of ripple Lref, and initial value controller 5112 is via at least one first predetermined value, at least one second predetermined value, before jumped onto the tracks the corresponding certain minimum of a particular maximum value (for example above-mentioned MAX) (for example above-mentioned MIN) and rf chain ripple signal Sin in the operation with one in the operation of jumping onto the tracks at present at the beginning the time signal magnitude (for example above-mentioned IN) directly set an initially present crest value, one initial trough value at present, (N-1) individual initial previous crest value and (N-1) individual initial previous trough value are cut the initial value of the accurate position of ripple Lref with control.In this example, initial value controller 5112 is set IN-(MAX-MIN) and is given initial trough value at present, IN gives initial crest value at present, at least one first predetermined value gives (N-1) individual initial previous crest value respectively and at least one second predetermined value is given (N-1) individual initial previous trough value respectively, and in a preferable setting, this particular maximum value MAX is last object wave peak value VMAX that finds in the operation of before jumping onto the tracks, and this certain minimum is last object wave valley VMIN that finds in the operation of before jumping onto the tracks, in addition, each first predetermined value can be set to any number of the minimum value in all possible trough value that is less than or equal to rf chain ripple signal or be set at last minimum value that finds (being MIN) in the operation of before jumping onto the tracks, and each second predetermined value can be set to more than or equal to the peaked any number in all possible crest value of rf chain ripple signal or be set at last maximal value that finds (being MAX) in the operation of before jumping onto the tracks.
If initial value controller 5112 only designs the initial value of supporting described in above-mentioned first embodiment and sets mechanism, then initial value controller 5112 can additionally decide initial value and have higher circuit complexity according to expression formula (6) because need; Yet, if initial value controller 5112 only designs the initial value supported described in above-mentioned second embodiment and sets mechanism, then because need not any extra computing, so just the circuit complexity of initial value controller 5112 can thereby reduction, thus, production cost also can decrease.
Please consult Fig. 1 and Fig. 2 simultaneously, the sequential chart of a reference accurate position Lref that Fig. 2 is shown in Figure 1 for the present invention produces and the embodiment of section ripple signal Sout.As mentioned above, in one embodiment of the invention, input signal Si n is a rf chain ripple signal, and reference signal Sref follows the rail zero-crossing signal, the accurate position of reference Lref is the accurate position of one section ripple that is used for cutting rf chain ripple signal, and a section ripple signal Sout is an image signal.If testing circuit 5104 is used for detecting object wave peak value VMAX and the object wave valley VMIN (the mobile window that promptly be used for monitor the amplitude size of rf chain ripple signal be defined as the one-period that follow rail zero-crossing signal Sref) of rf chain ripple signal in the one-period of following rail zero-crossing signal Sref.When time T b2, peak detector 5124 is followed the crest value V1 of the negative edge triggering of rail zero-crossing signal Sref with decision and corresponding half the track space P1 of output; The same time, valley detection device 5126 is by the trough value V2 of same negative edge triggering with decision and corresponding half the track space P1 of output.When time T b3, peak detector 5124 is followed the positive edge triggering of rail zero-crossing signal Sref with decision and the corresponding crest value V3 that is positioned at back second half track space P2 of half track space P1 of output; The same time, valley detection device 5126 is also by the trough value V2 of same positive edge triggering with back second half track space P2 of decision and corresponding half the track space P1 of output, during this time, snubber assembly 5128 stored crest value V1 with as previous crest value PRE_MAX, store trough value V2 as previous trough value PRE_MIN, store crest value V3 as crest value CUR_MAX and storage trough value V2 at present as present trough value CUR_MIN.So maximal value decision unit 5132 just output wave peak value V3 is object wave peak value VMAX, and minimum value decision unit 5134 just output wave valley V2 be object wave valley VMIN.Then, decision logic circuit 5106 just upgrades the accurate position of section ripple Lref according to the mean value of object wave peak value VMAX and object wave valley VMIN, and thus, the accurate Lref of ripple that cuts after the renewal promptly becomes (V3+V2)/2, as shown in Figure 2.Because after reading above-mentioned technology contents explanation, have the knack of this skill person and can understand the accurate position of disclosed section ripple easily and upgrade an operation meeting and be performed when other edge that follows the rail zero-crossing signal takes place, other does not repeat to give unnecessary details in this so further instruction is convenient to simplify for the purpose of the length.Please note, optical read/write head with respect to discs be displaced into time T b4 the time reverse, yet, cut the accurate position of ripple Lref via control suitably so that comparer 5114 is still exported the correct ripple signal Sout that cuts, therefore compared to prior art, the usefulness of (the seeking rail) operation of jumping onto the tracks just can promote.
In Fig. 2, other shows lock rail (on-track) indicator signal TRON, and lock rail signal TRON is a lock board pattern or (the seeking rail) pattern of jumping onto the tracks as system's flag to indicate present running, for instance, when lock rail indicator signal TRON was maintained at the accurate position of high logic, the expression optical read/write head was just running under the lock board pattern; Yet, when lock rail indicator signal TRON is converted to the accurate position of low logic by the accurate position of high logic, the expression optical read/write head enters jumping out of rail mode, and when lock rail indicator signal TRON changed go back to the accurate position of high logic by the accurate position of low logic, the expression optical read/write head left jumping out of rail mode.As shown in Figure 2, jumping out of rail mode is activated in the operation time period of time T b1 to Tb1 ', when time T b1, begin to carry out a new operation of jumping onto the tracks, so, when lock rail indicator signal TRON when time T b1 switches to the accurate position of low logic by the accurate position of high logic, initial value controller 5112 just is activated and cuts the initial value of the accurate position of ripple Lref with control, and when the operation of next time jumping onto the tracks is activated, produce an edge owing to follow the rail zero-crossing signal in time T b1 ', so just can be used for controlling the initial value of the accurate position of section ripple Lref when jumping onto the tracks operation next time in object wave peak value VMAX and the object wave valley VMIN that this time point obtained.
Moreover; when optical read/write head is mobile on the defect area (defect area) of discs; the waveform of rf chain ripple signal just can be irregular, so the present invention provides holding circuit 5110 to prevent to cut the accurate position of ripple in addition and is offset mistakenly because of the disc defect influence.As shown in Figure 1; holding circuit 5110 is coupled to update controller 5108; and be used for when a disc defects detection result points out to find defective on the discs; control update controller 5108 keeps (hold) the present accurate position of section ripple Lref; because it is known by industry how to detect the disc defective, repeats no more so detailed operation is convenient to this.See also Fig. 3, Fig. 3 is the operation chart of an embodiment of protection mechanism of the present invention.Disc defective indicator signal Sdi is used to refer to whether the discovery defective is arranged on the discs; when time T b5; disc defective indicator signal Sdi switches the accurate position of paramount logic by the accurate position of low logic; expression has the defective on the discs of being found at this moment; so holding circuit 5110 just indicates update controller 5108 will keep the present accurate position of section ripple Lref; and when time T b5 '; disc defective indicator signal Sdi switches go back to the accurate position of low logic by the accurate position of high logic; expression optical read/write head this moment has not contained the disc zone of defective on the moving CD sheet, so the accurate position of the ripple Lref that cuts that holding circuit 5110 just allows update controller 5108 to obtain is passed to follow-up comparer 5114.
See also Fig. 4, Fig. 4 handles the process flow diagram of rf chain ripple signal with an embodiment of generation image signal for the present invention.If can obtain identical result haply, then do not limit will be according to order shown in Figure 4 in the execution of step.The flow process that produces image signal comprises following steps:
Step 400: beginning.
Does step 402: (the seeking rail) pattern of jumping onto the tracks activate? if then execution in step 404; Otherwise repeating step 402 is to continue monitoring.
Step 404: set the initial value that cuts the accurate position of ripple.
Step 406: relatively rf chain ripple signal with cut the accurate position of ripple and export or upgrade image signal.
Does step 408: the lock board pattern activate? if then execution in step 402; Otherwise, execution in step 410.
Step 410: in the cycle, detect the object wave peak value and the object wave valley of rf chain ripple signal in the integral multiple that follows the rail zero-crossing signal.
Step 412: average criterion crest value and object wave valley are to produce mean value.
Step 414: use mean value to upgrade and cut the accurate position of ripple, then, get back to step 406.
Said method is carried out by device shown in Figure 1 5100, owing to form the function of assembly in the relative assembly 5100 and the details of running describes in detail as above, so the explanation of each step is convenient to this and is not given unnecessary details in addition among Fig. 4.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (36)
1. the device of the input signal that produced via access one optical storage media of a processing is characterized in that described device includes:
One testing circuit, it is coupled to described input signal, be used for detecting in a period object wave peak value and an object wave valley of described input signal, the wherein said period is not less than the one-period of a reference signal that is produced via the described optical storage media of access; And
One decision logic circuit, it is coupled to described testing circuit, is used for determining one with reference to accurate position according to described object wave peak value and described object wave valley.
2. device as claimed in claim 1 is characterized in that the described period equals the integral multiple in the described cycle of described reference signal.
3. device as claimed in claim 1 is characterized in that, described optical storage media is a discs.
4. device as claimed in claim 3 is characterized in that, described input signal is a rf chain ripple signal, and described reference signal is to follow the rail zero-crossing signal.
5. device as claimed in claim 1 is characterized in that, described testing circuit includes:
One peak detector, its each edge by described reference signal is triggered a crest value that detects described input signal;
One valley detection device, its each edge by described reference signal is triggered a trough value that detects described input signal;
One snubber assembly, it is coupled to described peak detector and described valley detection device, be used for that temporary described peak detector triggers with N first leading edge respectively at a present edge of described reference signal and a present crest value and the individual crest value before of N exported, and temporary described valley detection device triggers with described N first leading edge respectively at the described present edge of described reference signal and a present trough value and the individual trough value before of N exported, and wherein N is equal to or greater than 1 integer; And
One treatment circuit, it is coupled to described snubber assembly, is used for deciding described object wave peak value according to described present crest value and described N previous crest value, and decides described object wave valley according to described present trough value and described N previous trough value.
6. device as claimed in claim 5 is characterized in that, described treatment circuit includes:
One maximal value decision unit, it is used from selecting a maximal value in described present crest value and the individual previous crest value of described N and is used as described object wave peak value; And
One minimum value decision unit, it is used from selecting a minimum value in described present trough value and the individual previous trough value of described N and is used as described object wave valley.
7. device as claimed in claim 6 is characterized in that, described decision logic circuit decides described with reference to accurate position via average described object wave peak value and described object wave valley.
8. device as claimed in claim 6 is characterized in that, described device also includes:
One initial value controller, its be used for being dependent on the particular maximum value, a certain minimum that in described previous operation time period, is determined and the described input signal that are determined in the previous operation time period in a present operation time period at the beginning the time signal magnitude a described initial value with reference to accurate position is provided; And
One update controller, it is coupled to described decision logic circuit and described initial value controller, is used for receiving described initial value and optionally sets described with reference to accurate position with described initial value.
9. device as claimed in claim 8 is characterized in that, described initial value Lini is set according to following formula:
Lini＝IN-(MAX-MIN)/2；
Wherein IN be described input signal in described present operation time period at the beginning the time signal magnitude, MAX is the described particular maximum value that is determined in the described previous operation time period, and MIN is the described certain minimum that is determined in the described previous operation time period.
10. device as claimed in claim 9 is characterized in that, described particular maximum value last maximal value for being found in described previous operation time period; And described certain minimum last minimum value in described previous operation time period, being found.
11. device as claimed in claim 6 is characterized in that, described device also includes:
One initial value controller, it is coupled to described snubber assembly, be used for controlling a described initial value with reference to accurate position, wherein said initial value controller be dependent on the particular maximum value, a certain minimum that in described previous operation time period, is determined and the described input signal that are determined in the previous operation time period in a present operation time period at the beginning the time signal magnitude directly sets an initial crest value at present, a N initial previous crest value, an initially present trough value and N individual initially before the trough value to control described initial value.
12. device as claimed in claim 11, it is characterized in that, described particular maximum value last maximal value, and described certain minimum last minimum value in described previous operation time period, being found in described previous operation time period, being found.
13. device as claimed in claim 11, it is characterized in that, described initial value controller is set IN-(MAX-MIN) and is given described initial trough value at present, IN gives described initial crest value at present, at least one first predetermined value gives described N initial previous crest value respectively and at least one second predetermined value is given described N initial previous trough value respectively, wherein IN be described input signal in described present operation time period at the beginning the time signal magnitude, MAX is the described particular maximum value that is determined in the described previous operation time period, and MIN is the described certain minimum that is determined in the described previous operation time period.
14. device as claimed in claim 13, it is characterized in that, described particular maximum value last maximal value, and described certain minimum last minimum value in described previous operation time period, being found in described previous operation time period, being found.
15. device as claimed in claim 14 is characterized in that, described first predetermined value is described last minimum value, and described second predetermined value is described last maximal value.
16. device as claimed in claim 15, it is characterized in that, each first predetermined value is less than or equal to the minimum value in all possible trough value of described input signal, and each second predetermined value is more than or equal to the maximal value in all possible crest values of described input signal.
17. device as claimed in claim 1 is characterized in that, described device also includes:
One update controller, it is coupled to described decision logic circuit; And
One holding circuit, it is coupled to described update controller, when being used for that a defective is detected on described optical storage media, indicates described with reference to accurate position that described update controller keeps that described decision logic circuit produced.
18. device as claimed in claim 1 is characterized in that, described reference signal is the accurate position of one section ripple, and described device also includes:
One comparer, it is coupled to described input signal and described decision logic circuit, is used for accurate position of more described section ripple and described input signal to produce one section ripple signal.
19. the method for the input signal that a processing is produced via access one optical storage media is characterized in that described method includes following steps:
Detect an object wave peak value and an object wave valley of described input signal in a period, the wherein said period is not less than the one-period of a reference signal that is produced via the described optical storage media of access; And
Determine one with reference to accurate position according to described object wave peak value and described object wave valley.
20. method as claimed in claim 19 is characterized in that, the described period equals the integral multiple in the described cycle of described reference signal.
21. method as claimed in claim 19 is characterized in that, described optical storage media is a discs.
22. method as claimed in claim 21 is characterized in that, described input signal is a rf chain ripple signal, and described reference signal is to follow the rail zero-crossing signal.
23. method as claimed in claim 19 is characterized in that, the step that detects described object wave peak value and described object wave valley includes:
Detect a crest value of described input signal in each edge-triggered one peak detector of described reference signal;
Detect a trough value of described input signal in each edge-triggered one valley detection device of described reference signal;
A temporary present edge respectively at described reference signal triggers with N first leading edge and a present crest value and the individual crest value before of N exported in described peak detector;
Temporary described present edge respectively at described reference signal triggers with described N first leading edge and a present trough value and the individual trough value before of N exported in described valley detection device, and wherein N is equal to or greater than 1 integer;
Decide described object wave peak value according to described present crest value and described N previous crest value; And
Decide described object wave valley according to described present trough value and described N previous trough value.
24. method as claimed in claim 23 is characterized in that, determines the step of described object wave peak value to include: in described present crest value and the individual previous crest value of described N, select a maximal value and be used as described object wave peak value; And determine the step of described object wave valley to include: in described present trough value and the individual previous trough value of described N, to select a minimum value and be used as described object wave valley.
25. method as claimed in claim 24 is characterized in that, determines described step with reference to accurate position to include: average described object wave peak value and described object wave valley decide described with reference to accurate position.
26. method as claimed in claim 24 is characterized in that, described method also includes:
Be dependent on the particular maximum value, a certain minimum that in described previous operation time period, is determined and the described input signal that are determined in the previous operation time period in a present operation time period at the beginning the time signal magnitude a described initial value with reference to accurate position is provided; And
Optionally set described with reference to accurate position with described initial value.
27. method as claimed in claim 26 is characterized in that, described initial value Lini is set according to following formula:
Lini＝IN-(MAX-MIN)/2；
Wherein IN be described input signal in described present operation time period at the beginning the time signal magnitude, MAX is the described particular maximum value that is determined in the described previous operation time period, and MIN is the described certain minimum that is determined in the described previous operation time period.
28. method as claimed in claim 27 is characterized in that, described particular maximum value last maximal value for being found in described previous operation time period; And described certain minimum last minimum value in described previous operation time period, being found.
29. method as claimed in claim 24 is characterized in that, described method also includes:
Be dependent on the particular maximum value, a certain minimum that in described previous operation time period, is determined and the described input signal that are determined in the previous operation time period in a present operation time period at the beginning the time signal magnitude directly set an initial crest value at present, a N initial previous crest value, an initial trough value at present and N initial previous trough value with the initial value of control with reference to accurate position.
30. method as claimed in claim 29, it is characterized in that, described particular maximum value last maximal value, and described certain minimum last minimum value in described previous operation time period, being found in described previous operation time period, being found.
31. method as claimed in claim 29, it is characterized in that, IN-(MAX-MIN) sets and gives described initial trough value at present, IN sets and gives described initial crest value at present, at least one first predetermined value is set respectively and is given the initial previous crest value of described N and at least one second predetermined value and set respectively and give described N initial previous trough value, wherein IN be described input signal in described present operation time period at the beginning the time signal magnitude, MAX is the described particular maximum value that is determined in the described previous operation time period, and MIN is the described certain minimum that is determined in the described previous operation time period.
32. method as claimed in claim 31, it is characterized in that, described particular maximum value last maximal value, and described certain minimum last minimum value in described previous operation time period, being found in described previous operation time period, being found.
33. method as claimed in claim 32 is characterized in that, described first predetermined value is described last minimum value, and described second predetermined value is described last maximal value.
34. method as claimed in claim 33, it is characterized in that, each first predetermined value is less than or equal to the minimum value in all possible trough value of described input signal, and each second predetermined value is more than or equal to the maximal value in all possible crest value of described input signal.
35. method as claimed in claim 19 is characterized in that, described method also includes:
When detecting a defective on the described optical storage media, keep described with reference to accurate position.
36. method as claimed in claim 19 is characterized in that, described reference signal is the accurate position of one section ripple, and described method also includes:
More described section accurate position of ripple and described input signal are to produce one section ripple signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81098906P | 2006-06-05 | 2006-06-05 | |
| US60/810,989 | 2006-06-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101086867A CN101086867A (en) | 2007-12-12 |
| CN100543850C true CN100543850C (en) | 2009-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101096622A Expired - Fee Related CN100543850C (en) | 2006-06-05 | 2007-06-05 | Detect the object wave peak value of input signal and the apparatus and method of object wave valley |
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| CN (1) | CN100543850C (en) |
| TW (1) | TW200810358A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105975091A (en) * | 2016-07-05 | 2016-09-28 | 南京理工大学 | Virtual keyboard human-computer interaction technology based on inertial sensor |
| CN107505498B (en) * | 2017-08-31 | 2019-12-10 | 东南大学 | Peak and valley value detection circuit |
| TWI766783B (en) * | 2021-07-30 | 2022-06-01 | 長庚大學 | Method for detecting peaks and troughs of a signal |
-
2007
- 2007-06-05 CN CNB2007101096622A patent/CN100543850C/en not_active Expired - Fee Related
- 2007-06-05 TW TW96120219A patent/TW200810358A/en unknown
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| TW200810358A (en) | 2008-02-16 |
| CN101086867A (en) | 2007-12-12 |
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