CN101355712B - Method and system for measuring signal - Google Patents
Method and system for measuring signal Download PDFInfo
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- CN101355712B CN101355712B CN2007100293939A CN200710029393A CN101355712B CN 101355712 B CN101355712 B CN 101355712B CN 2007100293939 A CN2007100293939 A CN 2007100293939A CN 200710029393 A CN200710029393 A CN 200710029393A CN 101355712 B CN101355712 B CN 101355712B
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Abstract
The present invention provides a signal measurement method, comprising the following steps of firstly, receiving a resultant signal stream; secondly, detecting the resultant signal stream at a first time point to obtain a first signal value; thirdly, determining the implementation of a color gradation curve measurement for the resultant signal stream according to the first signal value. Accordingthe signal measurement method and the system, the instance that the measurement result is not correct because the measurement command and the color gradation video streaming can not be synchronous can be avoided, and the influence due to the delay problem is overcome.
Description
Technical field
The invention relates to a kind of measuring signal method with and system, particularly can be in digital broadcasting carry out measuring signal method and the system that the color range curve measures to the audio-visual crossfire of color stage relevant for a kind of.
Background technology
Color range curvature correction (Gamma Curve Correction) is a very important visual color trimming process, by measuring color stage curve (Gamma Curve), again via special algorithm, calculate out reference table (LookUp Table), can adjust input/output signal, reach the purpose of correction.The color range curve can be in order to judge each rank color correctness of each color, for example, if the color range curve of each color is all different, just representative is all inequality in the colors of image quality of different rank, red partially under some brightness exponent number, green partially under some brightness exponent number, some brightness exponent number is blue partially down, and image color distortion situation will be fairly obvious.Generally speaking, because human eye has the effect of different identifications to different brightness, the color range curve can not be straight line usually.Therefore, the color range curve must meet certain standard, can guarantee that just the demonstration of image color is normal.
The color range curve is meant the relation curve of different GTGs and brightness, works as the x axle with 0～255 rank, the worthwhile y axle of shades of colour actual displayed, and the curve that comes that draws is the color range curve.In the simulated television of propagating with analog signal, the measurement system that the color range signal curve is to use figure signal generator, color analysis instrument and computer to constitute measures.Wherein, color analysis instrument is a kind of simple to operate and meet all-environment color measuring instrument, can show fast RGB measuring value and can be in order to measurement and the adjustment of carrying out the color range curve.The color range signal that the figure signal generator then can produce different GTGs carries out measuring signal for color analysis instrument.Figure 1A shows the schematic diagram of the method for measurement of a color range curve of demonstrating.Wherein, c0 represents the 0th rank color range signal, and c1 represents the 1st rank color range signal, and c255 represents the 255th rank color range signal, by that analogy.Color range signal c0, c1 are all produced by the figure signal generator.The process that measures is as follows: export a specific color range signal by the figure signal generator, and color analysis instrument 10 is assigned measurement instruction (as 20 among the figure), the figure signal generator is then exported time color stage signal again and is measured for color analysis instrument.After color analysis received and measures instruction, foundation measured the brightness value of the present color range signal of instruction detecting, and its corresponding relation is noted, to obtain the color range curve.For instance, at first, the figure signal generator is exported the 0th color range signal, and assigns to measure and instruct 1 (as 20 among the figure) to color analysis instrument.Then, the figure signal generator is exported the 1st color range signal, so color analysis instrument just measures corresponding this 1st color range luminance signals value.Then, assign measuring instruction 2 to color analysis instrument, the figure signal generator is exported the 2nd color range signal, so color analysis instrument just measures corresponding this 2nd color range luminance signals value, above-mentioned steps repeats, and all measures up to whole 256 rank color range signals to finish.After measurement finishes, can obtain a color range curve γ shown in Figure 1B.The X-axis of color range curve γ represents that the color range signal imported, Y-axis represent its output brightness.Shown in Figure 1B, when input levels was the 127th rank color range signal, the brightness value that measures was L.
In above-mentioned measurement process, can be synchronous owing to measure speed with the color range rate of change of color range signal, therefore can obtain correct color range curve.
Yet; along with prevailing of Digital Television; signal all transmits with digital mode; can transfer broadcasted content to audio-visual crossfire earlier during propagation; via modelling device (modulator) its modularization is exported again; after Digital Television receives, separate mould (demodule) and, therefore cause transmission end and receiving terminal that arranged one uncontrollable time of delay via video signal (MPEG2) decoding back output.To make that the measurement instruction can't be synchronous with the audio-visual crossfire of color range this uncontrollable time of delay, and make the color range curve measure and in digital broadcasting, become and to implement.Please refer to Fig. 1 C, Fig. 1 C shows the schematic diagram of the measuring signal method of another demonstration.As shown in the figure, when output measurement instruction desire measures the brightness of the 1st rank color range signal,, may measure the color range signal on the 0th rank owing to the time of delay that can't expect in the digital communication, and the measurement that makes the mistake.Can't be synchronous because measure instruction with the audio-visual crossfire of color range, measuring the result who comes out also may be incorrect.
In order to solve above-mentioned stationary problem, a kind of practice is to prolong the demonstration time of each color range in the audio-visual crossfire (as the reaction time of human eye differentiation, 2.5 second), when color range shows startup, see through computer by the human eye analysis color analysis instrument is assigned the measurement instruction, and each measurement command interval is 2.5 seconds.Thus, the measurement time will increase several times, and also may or give an order because of the human eye erroneous judgement causes measuring failure too slowly.Moreover audio-visual crossfire memory capacity also increases along with the prolongation of the time of measurement, makes some audio-visual crossfire generator to load.
Summary of the invention
In view of this, one of purpose of the present invention promptly is to provide a kind of measuring signal method and system, is used to carry out in the digital broadcasting measurement of color range curve, to overcome the influence that above-mentioned delay issue brings.
Based on above-mentioned purpose, the invention provides a kind of measuring signal method, comprise the following steps.At first, receive composite signal stream.Secondly, in very first time point detecting composite signal stream, thereby obtain one first signal value.Then, carrying out the color stage curve according to the decision of first signal value for composite signal stream measures.
The present invention also provides a kind of measuring signal system, and it comprises at least one processing unit.Wherein, processing unit flows in very first time point detecting composite signal, thereby obtains one first signal value, and carry out the measurement of color stage curve according to the decision of first signal value for composite signal stream in order to receive composite signal stream.Wherein, the measuring signal system more comprises a signal generator, and in order to produce composite signal stream, wherein composite signal stream comprises one first signal and a measured signal, and measured signal has a plurality of color range signals, and first signal is before measured signal.
By measuring signal method of the present invention and system, even in the environment of digital broadcasting, also can utilize the composite signal stream decoding exactly with a signal specific of particular design, make the color range rate of change that measures color range signal in instruction and the measured signal synchronous, make the color range curve can in digital broadcasting, carry out correct measurement, avoid overcoming delay issue and having brought influence because of measuring instruction and the incorrect situation of the possibility of result that the audio-visual crossfire of color range can't measure out synchronously.
Description of drawings
Figure 1A shows the schematic diagram of the method for measurement of a color range curve of demonstrating.
Figure 1B shows the schematic diagram of the color range curve of a demonstration;
Fig. 1 C shows the schematic diagram of method for measurement of the color range curve of another demonstration;
Fig. 2 shows a schematic diagram according to the measuring signal system of the embodiment of the invention.
Fig. 3 shows a flow chart according to the measuring signal method of the embodiment of the invention.
Fig. 4 A demonstration one is according to the schematic diagram of the composite signal stream of the embodiment of the invention.
Fig. 4 B shows another schematic diagram according to the composite signal stream of the embodiment of the invention
Fig. 5 shows the flow chart according to the measuring signal method of another embodiment of the present invention.
Fig. 6 shows a schematic diagram according to the color range curve method for measurement of the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of measuring signal method and system, is used to measure in the digital broadcasting the audio-visual crossfire of color stage (measured signal) to obtain its corresponding color range curve.According to the embodiment of the invention, the color range signal that inserted a tool certain luminance before transmission has a measured signal of a plurality of color range signals earlier to be to produce composite signal stream, and wherein the brightness of the most preceding color range signal in these color range signals is that brightness with the color range signal of certain luminance differs a set value.Therefore, when receiving this composite signal stream, just can be according to the difference of the signal value that detects, earlier with the pattern that measures at a high speed to find in the measured signal in the composite signal stream the most preceding color range signal in this described color range signal (for example, the 0th rank color range signal or the 255th rank color range signal), synchronous measure pattern with the rate of change identical with the signal of color range described in the measured signal measures for composite signal stream again, thereby obtains the color stage curve of these color range signals in the corresponding measured signal.Change because the color range rate of change can be set at per second two color ranges when making, can significantly shorten the measurement time.
Fig. 2 shows a schematic diagram according to the measuring signal system of the embodiment of the invention.As shown in the figure, comprise an at least one processing unit 210 and a signal generator 220 in the measuring signal system 200.Signal generator 220 is in order to produce composite signal stream S, wherein composite signal stream S comprises the color range signal C and a measured signal ST of a tool certain luminance, measured signal ST has a plurality of color range signals, and the color range signal C of certain luminance is inserted in before the measured signal ST.The composite signal stream S that processing unit 210 received signal generators 220 produce, and in each particular point in time detecting composite signal stream S, thereby obtain a signal value (brightness value), and whether begin to carry out the measurement of color stage curve for composite signal stream according to this signal value decision.Please refer to the explanation of Fig. 4 A and Fig. 4 B about the long form of composite signal stream.Wherein, processing unit 210 more comprises a color analyzer 212, in order to receive processing unit 210 down instruction and flow S in each particular point in time detecting composite signal, thereby obtain this signal value.
Fig. 4 A and Fig. 4 B show two schematic diagrames according to the composite signal stream 400 and 400 ' of the embodiment of the invention respectively.Suppose that one has 256 rank brightness and brightness 0 and is minimum brightness, brightness 255 is high-high brightness.Shown in Fig. 4 A, the high color range signal 410 and the measured signal 420 that comprise a tool high brightness in the composite signal stream 400, wherein measured signal 420 comprises a plurality of color range signal 0-255, and color range signal 0-255 is incremented to high-high brightness by minimum brightness in regular turn, and the color range rate of change of adjacent two color range signals is no more than 10%.For instance, the brightness of the most preceding color range signal (color range signal 0) equals the minimum brightness in the color range signal in the color range signal, that is brightness 0.As shown in the figure, signal color range signal is according to color range signal 0, color range signal 1... color range signal 255 is arranged, and wherein color range signal 0 equals minimum brightness (brightness 0), color range signal 1 has one first brightness (brightness 1), and brightness 1 is greater than minimum brightness, and color range signal 255 equals high-high brightness (brightness 255).High color range signal 410 has a specific brightness, and the luminance difference of this certain luminance and the most preceding color range signal (the 0th rank color range signal) is greater than 10%.For instance, because the brightness of the most preceding color range signal (the 0th rank color range signal) equals the minimum brightness (brightness 0) in the color range signal, therefore as long as the difference of the certain luminance of the high color range signal 410 of high brightness and the brightness of the most preceding color range signal is greater than 26 rank, for example, can be brightness 50 any one to the brightness 255.For instance, shown in Fig. 4 A, the brightness of the most preceding color range signal (the 0th rank color range signal) equals minimum brightness (brightness 0), and the certain luminance of high color range signal 410 equals high-high brightness (brightness 255).
Similarly, shown in Fig. 4 B, the color range signal 410 ' and the measured signal 420 ' that comprise a tool low-light level in the composite signal stream 400 ', wherein measured signal 420 ' comprises a plurality of color range signal 255-0, and color range signal 255-0 is decremented to minimum brightness by high-high brightness in regular turn, and is opposite with the arrangement mode of measured signal 420 just.As shown in the figure, signal color range signal is according to color range signal 255, color range signal 254... color range signal 0 is arranged, and wherein color range signal 0 equals high-high brightness (brightness 255), color range signal 1 has one first brightness (brightness 254), and brightness 254 is less than high-high brightness, and color range signal 255 equals minimum brightness (brightness 0).For instance, the brightness of the most preceding color range signal in the measured signal (the 0th rank color range signal) equals the high-high brightness in the color range signal, that is brightness 255.Low color range signal 410 ' has a specific brightness, and the luminance difference of this certain luminance and the most preceding color range signal (the 0th rank color range signal) is greater than 10%.For instance, in this embodiment, the brightness of the most preceding color range signal (the 0th rank color range signal) equals the high-high brightness (brightness 255) in the color range signal, therefore as long as the difference of the certain luminance of low color range signal 410 ' and the brightness of the most preceding color range signal is greater than 26 rank, for example, can be brightness 200 any one to the brightness 50.For instance, shown in Fig. 4 B, the brightness of the most preceding color range signal (the 0th rank color range signal) equals high-high brightness (brightness 255), and the certain luminance of low color range signal 410 ' equals minimum brightness (brightness 0).It should be noted that herein luminance difference greater than 10% only in order to explanation, is not in order to limit the present invention, any all applicable the present invention of a ratio that can obviously tell the difference of two kinds of brightness.
Fig. 3 shows a flow chart according to the measuring signal method 300 of the embodiment of the invention.In this embodiment, the form of supposing composite signal stream S is the composite signal stream 400 that adopts as shown in Figure 3A.Please be simultaneously with reference to Fig. 2 and Fig. 3.At first, in step S310, processing unit 210 receives composite signal stream 400.Then, in step S320, processing unit 210 is assigned and is measured instruction, makes its color analysis instrument 212 in each particular point in time T detecting composite signal stream 400, thereby obtains the signal value S1 of a correspondence, for example a brightness value.In other words, after receiving the instruction that processing unit 210 assigns, color analysis instrument 212 will be according to the measurement speed of appointment, and detecting composite signal stream 400 is to obtain corresponding signal value.Then, in step S330, judge that whether the signal value S1 that detects is more than or equal to critical value A.The value of critical value A is adjustable, can select the standard that enough big values are used as judging according to user demand, for example, in this embodiment, since in the composite signal stream 400 in the measured signal 420 brightness of the most preceding color range signal (the 0th rank color range signal) be minimum brightness, then critical value A can be made as than minimum brightness greater than 10% brightness value, as 200, so that above-mentioned both have significantly and separate, can easily be told.If the signal value S1 that detects is during less than critical value A (200) (step S330 not), expression is not a real starting point in the composite signal stream 400, therefore returns step S310, in next time point detecting composite signal stream 400 to obtain corresponding signal value.If the signal value S1 that detects during more than or equal to critical value A (step S330 is), is expressed as the high color range signal of design in advance, therefore,, begins to carry out the color range curves with high speed measurement pattern and measure for composite signal stream 400 in step S340.At this moment, processing unit 210 will measure for composite signal stream 400 with the speed of per second 10 times.
Then, judge when this high color range signal finishes to find the initial test position of measured signal 420.So in step S350, processing unit 210 sees through color analysis instrument 212 detecting composite signal streams 400 respectively at time point T2 and T3, to obtain signal value S2 and S3.Wherein, time point T3 is time point T2 next detecting point afterwards.Afterwards, in step S360, judge signal value S2 whether less than the difference of set value P1 and signal value S2 and signal value S3 whether less than 10%.For instance, set value P1 can be 1 (cd/m2), and it is very little that the signal value that detected of expression becomes, that is high color range signal finishes, and next is exactly measured signal 420.The difference of signal value S2 and signal value S3 has detected the color range signal of measured signal 420 less than 10% expression.If (step S360 is) measures (step S370) just carry out the color range curve with the synchronous measure pattern of low speed for composite signal stream 400.At this moment, processing unit 210 measures for composite signal stream 400 with the measurement speed of the rate of change identical with color range signal in the measured signal 420, because it is consistent to measure the color range rate of change of the color range signal in speed and the measured signal 420, so can reach synchronous.For instance, change, then can be adjusted to per second twice, to carry out synchronous measure with measuring speed if the color range rate of change is set at per second two color ranges.At last, because it is synchronous to measure speed and color range rate of change, therefore just can measure the signal value of each the color range signal in the measured signal 420 in regular turn, obtain the color stage curve (step S380) of the color range signal in the measured signal 420 in the corresponding composite signal stream 400.
For instance, as shown in Figure 6, demonstration one is according to the schematic diagram of the color range curve method for measurement of the embodiment of the invention.As shown in the figure, before measured signal, add the high color range signal of the preceding paragraph with a plurality of color range signals, 3～5 seconds high color range signal for example, and set value P1 is 1 (cd/m2).When detecting this high color range signal, processing unit 210 is just assigned and is measured instruction, sees through 212 pairs of synthetic signal flows 400 of color analysis instrument and detects, and at this moment, the high speed that measures speed and be per second ten times measures pattern.Because be high color range signal the last period of composite signal stream 400, so at this moment, the brightness value that each time point detects all is higher than set value, processing unit 210 just continues to send measurement instruction 1, and expression also is not at present the color range signal in the measured signal.If detect the most preceding color range signal (the 0th rank color range signal) in the measured signal, because its brightness equals the minimum brightness in the color range signal, be lower than set value, represent that the initial test point of real measured signal finds.Error situation in order to prevent to measure and the measurement that leads to errors, then then reexamine brightness value that the next one detects whether with the difference of the brightness value of present detecting less than 10%.If, then can determine to have detected measured signal, so just processing unit 210 measure for composite signal stream 400 with the measurement speed of the rate of change that the color range signal is identical in the measured signal 420.Because the color range rate of change of the color range signal in the measured signal 420 is consistent with measurement speed, color analysis instrument 212 in the processing unit 210 can detect the brightness value of each color range signal correspondence in regular turn, and obtain the color stage curve, utilize this color range curve to proofread and correct again.
Fig. 5 shows the flow chart according to another measuring signal method 500 of the embodiment of the invention.In this embodiment, the form of supposing composite signal stream S is the composite signal stream 400 ' that adopts shown in Fig. 3 B.Please be simultaneously with reference to Fig. 2 and Fig. 5.At first, in step S510, processing unit 210 receives composite signal stream 400 '.Then, in step S520, processing unit 210 is assigned and is measured instruction, makes its color analysis instrument 212 in each particular point in time T ' detecting composite signal stream 400 ', thereby obtains the signal value S1 ' of a correspondence, for example a brightness value.Then, in step S530, judge whether the signal value S1 ' that detects is less than or equal to critical value B.The selection of the value of critical value B is opposite with the selection of the value of critical value A, can select the standard that enough little values are used as judging according to user demand, for example, in this embodiment, since in the composite signal stream 400 ' in the measured signal 420 ' brightness of the most preceding color range signal (the 0th rank color range signal) be high-high brightness, then critical value B can be made as than high-high brightness less than 10% brightness value, as 100, so that above-mentioned both have significantly and separate, can easily be told.If the signal value S1 ' that detects is during greater than critical value B (100) (step S530 not), expression is not a real starting point in the composite signal stream 400 ', therefore return step S520, flow 400 ' to obtain corresponding signal value in next time point detecting composite signal.When if the signal value S1 that detects is less than or equal to critical value A (step S530 is), be expressed as the low color range signal of design in advance, therefore,, begin to carry out the color range curve with high speed measurement pattern and measure for composite signal stream 400 ' in step S540.At this moment, processing unit 210 will measure for composite signal stream 400 ' with the speed of per second 10 times.
Then, judge when this low color range signal finishes to find the initial test position of measured signal 420 '.So in step S550, processing unit 210 sees through color analysis instrument 212 detecting composite signal streams 400 ' respectively at time point T2 ' and T3 ', to obtain signal value S2 ' and S3 '.Wherein, time point T3 ' is time point T2 ' next detecting point afterwards.Afterwards, in step S560, judge signal value S2 ' whether greater than the difference of set value P2 and signal value S2 ' and signal value S3 ' whether less than 10%.For instance, set value P2 can be 100, and it is very big that the signal value that expression is detected becomes, and in other words, low color range signal finishes, and next is exactly measured signal 420 '.The difference of signal value S2 ' and signal value S3 ' has detected color range signal in the measured signal 420 ' less than 10% expression.If (step S560 is) measures (step S570) just carry out the color range curve with the synchronous measure pattern of low speed for composite signal stream.At this moment, processing unit 210 measures for composite signal stream 400 ' with the measurement speed of the rate of change identical with color range signal in the measured signal 420 '.Because the color range rate of change is synchronous with measurement speed, therefore just can measure the signal value of each the color range signal in the measured signal 420 ' in regular turn, obtain the color stage curve (step S580) of the color range signal in the measured signal 420 ' in the corresponding composite signal stream 400 '.
To sum up state, by method of the present invention, even in the environment of digital broadcasting, also can utilize the composite signal stream decoding exactly with a signal specific of particular design, make the color range rate of change that measures color range signal in instruction and the measured signal synchronous, make the color range curve can in digital broadcasting, carry out correct measurement.Though it should be noted that above-mentioned is to be explanation with the color range measurement, yet the present invention is not limited to color range and measures, and any such as audio-visual crossfire optical measurement that needs to use color analysis instrument all can utilize this method to obtain synchronously, and then be measured.
Above-mentioned explanation provides several different embodiment or uses the present invention's distinct methods.Specific device in the example and method system the invention is not restricted to this certainly in order to help explaination the present invention's main spirit and purpose.
Therefore; though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those who are familiar with this art; without departing from the spirit and scope of the invention; when can doing a little change and retouching, so the present invention's protection range attached claim person of defining after looking is as the criterion.
Claims (21)
1. a measuring signal method is characterized in that, this method comprises the following steps:
Receive composite signal stream, the measured signal in this composite signal stream comprises a plurality of color range signals, and the brightness of the most preceding color range signal in this described color range signal is the minimum brightness in this described color range signal;
In this composite signal stream of very first time point detecting, thereby obtain one first signal value;
Judge that whether this first signal value is more than or equal to one first critical value; And
If beginning is carried out the color range curve for this composite signal stream and is measured.
2. measuring signal method as claimed in claim 1 is characterized in that, more comprises the following steps:
When described first signal value more than or equal to first critical value, begin that according to one first measurement pattern described composite signal stream is carried out this color range curve and measure, wherein the first measurement pattern is to measure for described composite signal stream according to a first rate;
Detect this composite signal stream in one second time point, thereby obtain a secondary signal value;
Detect this composite signal stream in one the 3rd time point, thereby obtain one the 3rd signal value;
Whether judge described secondary signal value less than a set value, and the difference of this secondary signal value and described the 3rd signal value is whether less than a both fixed-ratio; And
If described secondary signal value is less than set value, and the difference of this secondary signal value and the 3rd signal value is less than both fixed-ratios, carrying out the color range curve according to one second measurement pattern for described composite signal stream measures, the wherein said second measurement pattern is to measure for described composite signal stream according to one second speed, and described first rate is higher than second speed.
3. measuring signal method as claimed in claim 2 is characterized in that, the speed that more is included in the described first measurement pattern with per second 10 times measures for composite signal stream.
4. measuring signal method as claimed in claim 2, it is characterized in that, more be included in the described second measurement pattern and measure for described composite signal stream with the rate of change identical with the signal of color range described in the measured signal, thus obtain mutually should measured signal described in the color stage curve of color range signal.
5. measuring signal method as claimed in claim 2 is characterized in that, described color range signal is incremented to a high-high brightness by a minimum brightness.
6. a measuring signal method is characterized in that, this method comprises the following steps:
Receive composite signal stream, the measured signal in the described composite signal stream comprises a plurality of color range signals, and the brightness of the most preceding color range signal of this described color range signal is the high-high brightness in this described color range signal;
In this composite signal stream of very first time point detecting, thereby obtain one first signal value;
Judge whether described first signal value is less than or equal to one second critical value; And
If beginning is carried out the color range curve for described composite signal stream and is measured.
7. measuring signal method as claimed in claim 6 is characterized in that, more comprises the following steps:
When described first signal value is less than or equal to second critical value, begin to carry out the color range curve for described composite signal stream according to one first measurement pattern and measure, the wherein said first measurement pattern is to measure for described composite signal stream according to a first rate;
Detect described composite signal stream in one second time point, thereby obtain a secondary signal value;
Detect described composite signal stream in one the 3rd time point, thereby obtain one the 3rd signal value;
Whether judge this secondary signal value greater than a set value, and the difference of this secondary signal value and the 3rd signal value is whether less than a both fixed-ratio; And
If this described secondary signal value is greater than described set value, and the difference of this secondary signal value and the 3rd signal value is less than described both fixed-ratios, carrying out the color range curve according to one second measurement pattern for described composite signal stream measures, the wherein said second measurement pattern is to measure for described composite signal stream according to one second speed, and described first rate is higher than second speed.
8. measuring signal method as claimed in claim 7 is characterized in that, the speed that more is included in the described first measurement pattern with per second 10 times measures for composite signal stream.
9. measuring signal method as claimed in claim 7, it is characterized in that, more be included in the described second measurement pattern and measure for composite signal stream, thereby obtain the color stage curve of this described color range signal in the corresponding measured signal with the rate of change identical with the signal of color range described in the measured signal.
10. measuring signal method as claimed in claim 6 is characterized in that, described color range signal is decremented to a minimum brightness by a high-high brightness.
11. a measuring signal system is characterized in that, comprising:
At least one processing unit receives composite signal stream, in this composite signal stream of very first time point detecting, thereby obtains one first signal value, and determines that according to this first signal value carrying out the color stage curve for this composite signal stream measures; And
One signal generator, in order to produce this composite signal stream, wherein this composite signal stream comprises one first signal and a measured signal, this measured signal has a plurality of color range signals, and this first signal is before this measured signal;
Wherein, when the brightness of the most preceding color range signal in the described color range signal is in this described color range signal during minimum brightness, whether described processing unit judges first signal value more than or equal to one first critical value, if beginning is carried out the color range curve for described composite signal stream and measured.
12. measuring signal as claimed in claim 11 system is characterized in that, comprises that more this processing unit is carried out the following step when described first signal value during more than or equal to first critical value:
Begin to carry out this color range curve for this composite signal stream according to one first measurement pattern and measure, wherein this first measurement pattern system measures for this composite signal stream according to a first rate;
Detect this composite signal stream in one second time point, thereby obtain a secondary signal value;
Detect this composite signal stream in one the 3rd time point, thereby obtain one the 3rd signal value;
Whether judge this secondary signal value less than a set value, and the difference of this secondary signal value and the 3rd signal value is whether less than a both fixed-ratio; And
If this secondary signal value is less than this set value, and the difference of this secondary signal value and the 3rd signal value is less than this both fixed-ratio, carrying out this color range curve according to one second measurement pattern for this composite signal stream measures, wherein this second measurement pattern is to measure for described composite signal stream according to one second speed, and first rate is higher than second speed.
13. measuring signal as claimed in claim 12 system is characterized in that, comprises that more described processing unit speed with per second 10 times in the first measurement pattern measures for composite signal stream.
14. measuring signal as claimed in claim 12 system, it is characterized in that, comprise that more this processing unit measures for composite signal stream with the rate of change identical with the signal of color range described in the measured signal in this second measurement pattern, thus obtain mutually should measured signal described in the color stage curve of color range signal.
15. measuring signal as claimed in claim 11 system is characterized in that described color range signal is incremented to a high-high brightness by a minimum brightness.
16. a measuring signal system is characterized in that, comprising:
At least one processing unit receives composite signal stream, in this composite signal stream of very first time point detecting, thereby obtains one first signal value, and determines that according to this first signal value carrying out the color stage curve for this composite signal stream measures; And
One signal generator, in order to produce this composite signal stream, wherein this composite signal stream comprises one first signal and a measured signal, this measured signal has a plurality of color range signals, and this first signal is before this measured signal;
Wherein, when the brightness of the most preceding color range signal in the described color range signal is high-high brightness in this described color range signal, described processing unit judges whether first signal value is less than or equal to one second critical value, if beginning is carried out the color range curve for composite signal stream and measured.
17. measuring signal as claimed in claim 16 system is characterized in that, more comprises when first signal value is less than or equal to second critical value, this processing unit is carried out the following step:
Begin to carry out this color range curve for this composite signal stream according to one first measurement pattern and measure, wherein this first measurement pattern system measures for this composite signal stream according to a first rate;
Detect this composite signal stream in one second time point, thereby obtain a secondary signal value;
Detect this composite signal stream in one the 3rd time point, thereby obtain one the 3rd signal value;
Whether judge this secondary signal value greater than a set value, and the difference of this secondary signal value and the 3rd signal value is whether less than a both fixed-ratio; And
If this secondary signal value is greater than this set value, and the difference of this secondary signal value and the 3rd signal value is less than this both fixed-ratio, carrying out this color range curve according to one second measurement pattern for this composite signal stream measures, wherein this second measurement pattern is to measure for this composite signal stream according to one second speed, and this first rate is higher than this second speed.
18. measuring signal as claimed in claim 17 system is characterized in that, comprises that more processing unit speed with per second 10 times in the first measurement pattern measures for composite signal stream.
19. measuring signal as claimed in claim 17 system, it is characterized in that, comprise that more processing unit measures for described composite signal stream with the rate of change identical with color range signal described in this measured signal in this second measurement pattern, thus obtain mutually should measured signal in the color stage curve of this described color range signal.
20. measuring signal as claimed in claim 16 system is characterized in that described color range signal is decremented to a minimum brightness by a high-high brightness.
21. measuring signal as claimed in claim 16 system is characterized in that described processing unit more comprises a color analyzer, measures instruction with in very first time point detecting composite signal stream in order to receive one of this processing unit, thereby obtains first signal value.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030088295A (en) * | 2002-05-14 | 2003-11-19 | 엘지전자 주식회사 | Method and apparatus of driving plasma display panel |
| CN1753455A (en) * | 2004-09-21 | 2006-03-29 | 株式会社日立制作所 | Image display apparatus |
| CN1921585A (en) * | 2005-08-25 | 2007-02-28 | 精工爱普生株式会社 | Gray scale coefficient curve adjustment device and method of establishing adjustment points |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030088295A (en) * | 2002-05-14 | 2003-11-19 | 엘지전자 주식회사 | Method and apparatus of driving plasma display panel |
| CN1753455A (en) * | 2004-09-21 | 2006-03-29 | 株式会社日立制作所 | Image display apparatus |
| CN1921585A (en) * | 2005-08-25 | 2007-02-28 | 精工爱普生株式会社 | Gray scale coefficient curve adjustment device and method of establishing adjustment points |
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