CN101510429B - Method for obtaining recording media data frame, channel position and tunnel shore time length - Google Patents

Abstract

The invention relates to a method for obtaining recording medium data frames, channel bits and pit land time length. The method determines the total number A of every frame of pit and land by counting the pit and land number of a certain number of data frames; during the reading process of recording medium data, the time T required for continuous A multiplied by N is counted, wherein, N is not less than 1 and is an integer; relevant parameters during the reading process of recording medium data are obtained based on the known parameter of recording medium, which are specifically data frame time length T1, channel bit time length T2, the time length T3 of pit and land with different length, and recording medium rotation speed v. The method does not depend on the extraction of the frame header of recording medium data, can measure data frame time length T1, channel bit time length T2, the time length T3 of pit and land with different lengths, and recording medium rotation speed v at any rotation speed, and has higher stability and reliability compared with traditional detection methods.

Description

A kind of method of obtaining recording media data frame, channel bit and tunnel shore time length

Technical field

The present invention relates to information storing device data read field, be specifically related to a kind of method of obtaining recording media data frame, channel bit and tunnel shore time length.

Background technology

When being rotated the data of reading ﹠ recording medium, the simulating signal that reading ﹠ recording medium is produced reverts to before the original digital signal, promptly revert to and record recording medium data in the past, need come the rotating speed of recording medium is calculated with the simulating signal that reading ﹠ recording medium produced.

Because the data that record before the recording medium are digital signals, the position bit of the channel bit index word signal on the recording medium, a bit of a channel bit index word signal, weighing apparatus linear speed channel bit refers to all fix being recorded on the recording medium physical length of each bit, and the physical length here refers to the dimensions length on recording medium; Non-weighing apparatus linear speed channel bit refers to not fix being recorded on the recording medium physical length of each bit, and physical length 2 ends of weighing apparatus angle speed channel bit each bit on recording medium are to fix to the angle of rotation center.

For the traditional assay method of rotating speed of data carrier, be the rotating speed of recording medium need be controlled to certain scope and so on record frame structure weighing apparatus linear speed channel bit.Such as adding a fixing voltage to motor, so the angular velocity of driven by motor recording medium rotation is near a constant.Even voltage is fixed, owing to mechanical rotation be vibration arranged with recording medium be not real reasons such as circle, so angular velocity can fluctuate near a constant.Owing to have the data on the record frame structure weighing apparatus linear speed channel bit recording medium, the physical length of every frame data is fixed, the physical length of frame head is also fixed, therefore, the needed time of physical length that recording medium turns over frame head is a constant, and this constant can be converted to the time that the sampling clock number multiply by a clock.Promptly, add a voltage to motor, just can must arrive and determine under this voltage by this principle, the scope of the sampling clock number of frame head, extract frame head then and calculate Frame time span and recording medium rotational speed, the Frame time span is to read the needed clock number of physical length of frame data, and the recording medium rotating speed is the physical length that recording medium turns in the unit interval.

Frame head as shown in Figure 1 and hole bank simulating signal clock sampling synoptic diagram, in the analog sampling signal of being gathered, analog sampling signal greater than the DC level value is a bank continuously, the continuous analog sampling signal less than the DC level value is the hole, bank or hole all include an integer channel bit, wherein to comprise the number of channel bit maximum for frame head, comprise maximum channel bit numbers than the hole except that frame head or bank and also Duo 2; If experiment measures, under this voltage of given motor, the average out to A of the sampling clock number of frame head, the channel bit number that frame head contains is B, then can set a scope A ÷ B * (B-1) to A ÷ B * (B+1), when hole or the sampling clock number of bank at A ÷ B * (B-1) within the scope of A ÷ B * (B+1), then this hole of mark or bank are frame head; Frame head is a hole among the figure, and actual frame head has the hole, and bank is also arranged.The method that calculates the Frame time span after extracting frame head is that the sampling clock number between continuous 2 frame heads multiply by a clock time cycle.The method of calculating the rotating speed of recording medium is that the physical length of frame data is divided by the Frame time span.

The assay method of this routine has the limitation of recording medium rotational velocity range.Promptly need at first the rotating speed of recording medium is controlled to certain scope and so on, it all is inaccurate that situation about changing in rotational speed is utilized the rotating speed and the Frame time span of the recording medium that said method obtains, in addition, the calculating of correlation parameter during the rotation that only is applicable to the recording medium data with frame head structure is read.

Summary of the invention

The objective of the invention is to propose a kind of recording media data frame, passage of obtaining for reaching the method for tunnel shore time length, Frame time span, channel bit time span, the different length that can both measure recording medium under the speed of any rotation are cheated the tunnel shore time length and the recording medium rotational speed of bank.

For achieving the above object, the present invention adopts following technical scheme:

A kind of method of obtaining the recording media data frame time span is used for obtaining the Frame time span of described recording medium data read process, comprises step:

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, statistics occurs A * N continuously and cheats the used time T of bank, N 〉=1 wherein, and this N is an integer;

Read the used time and obtain Frame time span T1=T/N by calculating every frame data,

Wherein, obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

Preferably, described N is 1, in this method, obtain continuously several number according to frame time length after, the Frame time span after it is carried out the mean filter denoising and be optimized.

The present invention also provides a kind of method of obtaining the recording medium rotating speed, is used at weighing apparatus linear speed channel bit recording medium, obtains described recording medium and reads recording medium rotating speed in the process, comprises step:

Determine the physical length C of every frame data on the recording medium;

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, statistics occurs A * N continuously and cheats the used time T of bank, N 〉=1 wherein, and this N is an integer;

By calculate physical length that described recording medium turns in the unit interval obtain recording medium rotating speed v=(N * C)/T,

Wherein,

Obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

Preferably, described N is 1, in this method, and after continuously obtaining several recording medium rotating speeds, the recording medium rotating speed after it is carried out the mean filter denoising and be optimized.

The present invention also provides a kind of method of obtaining recording medium channel bit time span, is used for obtaining the channel bit time span that described recording medium reads process, comprises step:

Determine the channel bit total length M of N frame data on the recording medium, N 〉=1 wherein, this N is an integer;

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, A * N the used time T of hole bank appears in statistics continuously;

The used time of channel bit of reading in every frame data by calculating obtains channel bit time span T2=T/M,

Wherein,

Obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

Preferably, described N is 1, at weighing apparatus linear speed channel bit recording medium, and after obtaining several channel bit time spans continuously, the channel bit time span after it is carried out the mean filter denoising and be optimized.

The present invention also provides a kind of method of obtaining the recording medium tunnel shore time length, is used for obtaining the tunnel shore time length that described recording medium reads process, comprises step:

Determine the channel bit total length M of N frame data on the recording medium, N 〉=1 wherein, this N is an integer;

Determine the channel bit number x that the hole bank of different length on the recording medium is comprised;

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, A * N the used time T of hole bank appears in statistics continuously;

Obtain tunnel shore time length T3=(the T/M) * x of different length hole bank,

Wherein,

Obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

Preferably, described N is 1, and at weighing apparatus linear speed channel bit recording medium, after obtaining several tunnel shore time lengths continuously, the tunnel shore time length that equal length is cheated bank carries out the tunnel shore time length after the mean filter denoising is optimized.

Preferably, data have frame head on the described recording medium, obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

Recording medium read in the process with the duration in setting range the hole or bank as being designated as frame head, by described frame head specified data frame;

The hole bank sum that each Frame was occurred when statistics read several Frames continuously obtains the hole bank sum A ' that does not wait ₁, A ' ₂..., A ' _N1And corresponding respectively Frame number S ' ₁, S ' ₂..., S ' _N1, n1 is a positive integer, the number of the hole bank sum that representative does not wait;

Hole bank sum that will be corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n1}{\mathrm{\Σ}}}{A^{\′}}_i\×{S^{\′}}_i)\÷\underset{i=1}{\overset{n1}{\mathrm{\Σ}}}{S^{\′}}_i.$

Utilize the present invention to obtain Frame, channel bit and tunnel shore time length and recording medium rotating speed in the recording medium data read process, have following beneficial effect:

1) rotation that not only is applicable to the recording medium data that have frame head is read, and is applicable to that the rotation of the data carrier that does not have frame head reads;

2) recording medium the present invention under the speed of any rotation can both measure the tunnel shore time length and the recording medium rotational speed of its Frame time span, channel bit time span, different length hole bank, than traditional detection method higher stability and accuracy.

Description of drawings

Fig. 1 is frame head and a hole bank simulating signal clock sampling synoptic diagram in the prior art;

Fig. 2 is the hole of Frame in the embodiment of the invention and the synoptic diagram of bank sum statistics effect;

Fig. 3 proposes to obtain the method flow diagram of recording media data frame, channel bit and tunnel shore time length for the present invention.

Embodiment

The method of obtaining recording media data frame, channel bit and tunnel shore time length that the present invention proposes is described as follows in conjunction with the accompanying drawings and embodiments.

Embodiment 1

Have randomicity characteristics owing to passed through the data of scramble before the modulating-coding, so the probability that hole that the various distances of swimming are long behind the modulating-coding and bank occur is fixed, therefore, the hole that every frame data form on recording medium and the sum of bank approach a constant.Based on this, as shown in Figure 3, the present invention determines the approaching constant A of sum of every frame hole and bank by the hole bank number of the Frame of statistics some, in the recording medium data read process, add up continuous A * N the used time T of hole bank, wherein N 〉=1, and N is an integer; Obtain correlation parameter in the recording medium data read process based on the known parameters of recording medium, this correlation parameter is specially the tunnel shore time length T3 and the recording medium rotating speed v of Frame time span T1, channel bit time span T2, different length hole bank.

Obtain the hole bank sum A that every frame data form on the recording medium two kinds of methods are arranged.

Method one: according to after the foregoing scramble again the data distance of swimming numerical value of editorial afterword (after recording this Frame on the recording medium can form hole bank sum) be the theoretical foundation of constant, do not carry out recording medium and read and obtain A.

Comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding; If the distance of swimming numerical value that with the frame is some Frames of coming out of unit statistics modulating-coding has A ₁, A ₂..., A _n, the n representative has n distance of swimming numerical value that does not wait, and is not to have added up the n frame data.Suppose that distance of swimming numerical value is A ₁S arranged ₁Frame, number of runs are A ₂S arranged ₂Frame, number of runs are A _nS arranged _nFrame is then with A ₁, A ₂..., A _nBeing horizontal ordinate, is A with distance of swimming numerical value ₁, A ₂..., A _nCorresponding Frame number S ₁, S ₂..., S _nFor ordinate mark on figure comes out, so the figure that is similar to Fig. 2 that obtains, the value of last constant A is Frame number S ₁, S ₂..., S _nThe A of middle maximal value correspondence ₁, A ₂..., A _nIn distance of swimming numerical value; Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

Method two: data have frame head on this method requirement recording medium.

This method specifically comprises step:

Similar with method one, difference is the distance of swimming numerical value that is not that statistics modulates out through modulating-coding, but adds up by the simulating signal that reads from recording medium.Under arbitrary speed, by the simulating signal of gathering, time span according to frame head is that maximum characteristics find any one frame head in all hole banks, and the sampling number m of estimation frame head, it is the time span of frame head, this m also can carry out rising edge by the simulating signal that oscillograph reads recording medium to be triggered, the mesh figure that checks frame head estimates, because the time span of frame head is maximum in all hole banks, therefore be a frame to next sampling number near hole or the bank of m near the hole of m or bank from the current sampling point number, and the hole or the bank number that calculate this frame are A ' ₁, be A ' to next sampling number again near the hole bank number of m near the hole bank of m from next sampling number ₂, obtain A ' by that analogy _N1, the n1 representative has n1 hole bank sum that does not wait, and is not to have added up the n frame data.Add up to A ' with the method one described the same bank of will cheating then ₁, A ' ₂..., A ' _N1Corresponding frame number S ' ₁, S ' ₂..., S ' _N1Be ordinate, mark comes out on figure, so the figure that is similar to Fig. 2 that obtains, the value of last constant A is Frame number S ' ₁, S ' ₂..., S ' _N1The A ' of middle maximal value correspondence ₁, A ' ₂..., A ' _N1In distance of swimming numerical value.Above-mentioned is meant in the scope of setting around the m near m.In addition, also can obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n1}{\mathrm{\Σ}}}{A^{\′}}_i\×{S^{\′}}_i)\÷\underset{i=1}{\overset{n1}{\mathrm{\Σ}}}{S^{\′}}_i.$

As Fig. 2 is to be that the hole bank that unit is done is as stated above counted statistical graph with the frame to recording medium DVD5, and the peak of figure is exactly the constant A that will obtain, and also can be regarded as with the frame mean value of hole bank number of the many frames that are unit.

Provide the detailed process that present embodiment obtains the method for recording media data frame, channel bit and tunnel shore time length below.

1) obtains correlation parameter-Frame time span T1

At first before the recording medium data read, obtain the hole bank sum A that every frame data form on the recording medium as stated above; Several numbers of sampling clock that consumed when determining the continuous constant A of a statistics hole and bank are B, according to the clock period be t, the time T that is consumed when obtaining adding up a continuous constant A hole and bank '=B * t, the time span that just this moment reads frame data is T ', and then obtains Frame time span T1=T '.

2) obtain correlation parameter-channel bit time span T2

Identical with aforementioned concepts, at first before the recording medium data read, the hole bank number of the Frame by the statistics some is determined the total A of hole bank that every frame data form on the recording medium; Several numbers of sampling clock that consumed when determining the continuous constant A of a statistics hole and bank are B, according to the clock period be t, obtain adding up the time T that continuous constant A is cheated and consumed during bank '=B * t, the time span that just this moment reads frame data is T '; The channel bit total length of determining frame data is the M ' (data with frame structure, M ' is known, the channel bit that promptly has the Frame of frame structure is fixed, therefore there is the physical length of the Frame of frame structure weighing apparatus linear speed channel bit to fix, the physical length here refers to the dimensions length on recording medium), the run length that is Frame is M ', and what obtain the channel bit time span is T2=(B * t)/M '.

3) obtain correlation parameter-tunnel shore time length T3

Identical with aforementioned concepts, at first before the recording medium data read, obtain the hole bank sum A that every frame data form on the recording medium as stated above; Several numbers of sampling clock that consumed when determining the continuous constant A of a statistics hole and bank are B, according to the clock period be t, obtain adding up the time T that continuous constant A is cheated and consumed during bank '=B * t, the time span that just this moment reads frame data is T '; If the hole bank is x times of unit channel bit physical length, promptly cheating the channel bit number that bank comprised on physical length is x, under the situation of the channel bit total length M ' that determines recording medium previous frame data, then the time span of the hole of each length, bank (also claiming tunnel shore time length) is T3=(B * t ÷ M ') * x.

4) obtain correlation parameter-recording medium rotating speed v

Identical with aforementioned concepts, identical with aforementioned concepts, at first before the recording medium data read, obtain the hole bank sum A that every frame data form on the recording medium as stated above; Several numbers of sampling clock that consumed when determining the continuous constant A of a statistics hole and bank are B, according to the clock period be t, obtain adding up the time T that continuous constant A is cheated and consumed during bank '=B * t, the time span that just this moment reads frame data is T '; Because the rotating speed of recording medium is relevant with physical length,, under the situation of determining the physical length C of every frame data on the recording medium, calculate rotating speed v=C ÷ T '=C ÷ (B * t) of recording medium therefore at weighing apparatus linear speed channel bit recording medium.

From the assay method of above-mentioned Frame time span, channel bit length and tunnel shore time length as can be seen, it is relevant with the time, it doesn't matter with physical length, and therefore this assay method is all effective to weighing apparatus linear speed channel bit recording medium and non-weighing apparatus linear speed channel bit recording medium.

Owing to be tunnel shore time length, Frame time span and the recording medium rotating speed that every A hole bank just calculates one group of channel bit time span, each length hole and bank.In order to reduce the error of final value and actual value, can be with the N that calculates continuously (N＞1 wherein, and N is an integer) organize channel bit time span value, tunnel shore time length value, Frame time span value and recording medium tachometer value, carry out the mean filter denoising and finally obtain more approaching real value.

The core of the technology of the present invention side's bank design is that the hole bank number that will add up the Frame of right quantity determines that every frame is cheated and the approaching constant A of sum of bank, carries out the calculating of correlation parameter in the recording medium data read process then based on constant A.If several numbers of the sampling clock that is consumed when adding up individual hole of continuous constant N * AN (N＞1, and N is an integer) and bank are B1, according to top reasoning process, the time span that finally can obtain reading frame data is T1=B1 * t ÷ N; Under the situation of determining the channel bit total length M of N frame data on the recording medium, the channel bit time span is T2=B1 * t ÷ M; Behind the channel bit number x that the hole bank of different length on channel bit total length M that has determined N frame data on the recording medium and the recording medium is comprised, tunnel shore time length is T3=(B1 * t ÷ M) * x; Under the situation of determining the physical length C of every frame data on the recording medium, and the rotating speed v=of recording medium (÷ of N * C) (B1 * t); If the Integer N value is big more, at random the sum of the hole bank of N frame divided by N just more near A, otherwise if N got 1 o'clock, the difference range of randomly drawing the hole bank number of the frame that frame data obtain and A is big more.So, according to top reasoning from logic, the sum of the hole bank of a statistics Integer N frame is more accurate than the data that the hole bank number of adding up single frame calculates, and has so just saved the processing procedure that above-mentioned correlation parameter that the hole bank number of adding up single frame calculates need carry out the mean filter denoising.

Embodiment 2

Present embodiment is an example with recording medium DVD5, if when unknown speed is carried out data read to DVD5, we know that the data clock of every frame of DVD5 is that (channel bit that is every frame is 1488 to 1488T, original in other words digital signal has 1488 bit), Fig. 2 is the total statistical graph to the hole of every frame of DVD5 and bank, hence one can see that, the hole of Frame and the sum of bank are near constant 315, therefore when data are sampled, write down the clock number B2 of process in the time of can whenever cheating bank through 315, clock period is t, so the Frame time span that obtains this moment is T1=B2 * t, the channel bit time span is T2=B2 * t ÷ 1488; The channel bit number kind that the hole of DVD5 and bank comprise has: 3 channel bit, 4 channel bit, 5 channel bit, 6 channel bit, 7 channel bit, 8 channel bit, 9 channel bit, 10 channel bit, 11 channel bit, 14 channel bit, wherein the hole of 14 channel bit or bank are frame head, therefore, calculate the hole of each length of DVD5 in the present embodiment, the tunnel shore time length of bank is: B2 * t ÷ 1488 * 3, B2 * t ÷ 1488 * 4, B2 * t ÷ 1488 * 5, B2 * t ÷ 1488 * 6, B2 * t ÷ 1488 * 7, B2 * t ÷ 1488 * 8, B2 * t ÷ 1488 * 9, B2 * t ÷ 1488 * 10, B2 * t ÷ 1488 * 11, B2 * t ÷ 1488 * 14; And we know that the physical length of 3 unit channel bit of DVD5 is 400nm, and therefore the rotating speed (physical length that turns in the per second) of the recording medium that calculates is near v=400 ÷ 3 * 1488 ÷ T1=400 ÷ 3 * 1488 ÷ (B2 * t).

Owing to be tunnel shore time length value, Frame time span value and the recording medium tachometer value that per 315 hole banks just calculate one group of channel bit time span value, each length.In order to reduce the error of final value and actual value, we can be with the N that calculates continuously (N＞1 wherein, and N is an integer) tunnel shore time length value, Frame time span value and the recording medium tachometer value of group channel bit time span value, each length, carry out the mean filter denoising and finally obtain more approaching real value.

Above embodiment only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (9)

1. method of obtaining the recording media data frame time span is used for obtaining the Frame time span of described recording medium data read process, comprises step:

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, statistics occurs A * N continuously and cheats the used time T of bank, N 〉=1 wherein, and this N is an integer;

Read the used time and obtain Frame time span T1=T/N by calculating every frame data,

Wherein,

Obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

2. method according to claim 1 is characterized in that, described N is 1, in this method, obtain continuously several number according to frame time length after, the Frame time span after it is carried out the mean filter denoising and be optimized.

3. method of obtaining the recording medium rotating speed is used at weighing apparatus linear speed channel bit recording medium, obtains described recording medium and reads recording medium rotating speed in the process, comprises step:

Determine the physical length C of every frame data on the recording medium;

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, statistics occurs A * N continuously and cheats the used time T of bank, N 〉=1 wherein, and this N is an integer;

By calculate physical length that described recording medium turns in the unit interval obtain recording medium rotating speed v=(N * C)/T,

Wherein,

Obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

4. method according to claim 3 is characterized in that, described N is 1, in this method, and after continuously obtaining several recording medium rotating speeds, the recording medium rotating speed after it is carried out the mean filter denoising and be optimized.

5. a method of obtaining recording medium channel bit time span is used for obtaining the channel bit time span that described recording medium reads process, comprises step:

Determine the channel bit total length M of N frame data on the recording medium, N 〉=1 wherein, this N is an integer;

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, A * N the used time T of hole bank appears in statistics continuously;

The used time of channel bit of reading in every frame data by calculating obtains channel bit time span T2=T/M,

Wherein,

Obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

6. method according to claim 5 is characterized in that, described N is 1, at weighing apparatus linear speed channel bit recording medium, and after obtaining several channel bit time spans continuously, the channel bit time span after it is carried out the mean filter denoising and be optimized.

7. a method of obtaining the recording medium tunnel shore time length is used for obtaining the tunnel shore time length that described recording medium reads process, comprises step:

Determine the channel bit total length M of N frame data on the recording medium, N 〉=1 wherein, this N is an integer;

Determine the channel bit number x that the hole bank of different length on the recording medium is comprised;

Obtain the hole bank sum A that every frame data form on the recording medium;

In the recording medium data read process, A * N the used time T of hole bank appears in statistics continuously;

Obtain tunnel shore time length T3=(the T/M) * x of different length hole bank,

Wherein,

Obtain the hole bank sum A that every frame data form on the recording medium and comprise step:

With the frame distance of swimming numerical value of several Frames of coming out of unit statistics modulating-coding, the hole bank sum of described distance of swimming numerical value for forming after recording this Frame on the recording medium;

The distance of swimming numerical value A that does not wait that statistics is occurred ₁, A ₂..., A _nAnd corresponding respectively Frame number S ₁, S ₂..., S _n, n is a positive integer, the number of the distance of swimming numerical value that representative does not wait;

The distance of swimming numerical value corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{A}_i\×S_i)\÷\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{S}_i.$

8. method according to claim 7, it is characterized in that described N is 1, at weighing apparatus linear speed channel bit recording medium, after continuously obtaining several tunnel shore time lengths, the tunnel shore time length that equal length is cheated bank carries out the tunnel shore time length after the mean filter denoising is optimized.

9. according to the arbitrary described method of claim 1～8, it is characterized in that, data have frame head on the described recording medium, and the step that the described hole bank sum A that obtains every frame data formation on the recording medium comprises replaces with the step that the following hole bank sum A that obtains every frame data formation on the recording medium comprises:

Read in the process at recording medium hole or the bank of duration in setting range is designated as frame head, by described frame head specified data frame;

The hole bank sum that each Frame was occurred when statistics read several Frames continuously obtains the hole bank sum A ' that does not wait ₁, A ' ₂..., A ' _N1And corresponding respectively Frame number S ' ₁, S ' ₂..., S ' _N1, n1 is a positive integer, the number of the hole bank sum that representative does not wait;

Hole bank sum that will be corresponding with the Frame number of maximum is defined as the hole bank sum A that every frame data form on the recording medium;

Or obtain the hole bank sum A that every frame data form on the recording medium by following formula:

$A=(\underset{i=1}{\overset{n1}{\mathrm{\Σ}}}{A^{\′}}_i\×{S^{\′}}_i)\÷\underset{i=1}{\overset{n1}{\mathrm{\Σ}}}{S^{\′}}_i.$

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