CN106488082A - Determine compensating parameter, video signal is compensated with the method and device of process - Google Patents
Determine compensating parameter, video signal is compensated with the method and device of process Download PDFInfo
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- CN106488082A CN106488082A CN201611037899.XA CN201611037899A CN106488082A CN 106488082 A CN106488082 A CN 106488082A CN 201611037899 A CN201611037899 A CN 201611037899A CN 106488082 A CN106488082 A CN 106488082A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
Abstract
The present invention relates to video signal treatment technique field, determine compensating parameter, video signal is compensated with the method and device of process particularly to a kind of, in order to solve the problems, such as that the method determining compensating parameter at present can not accurately compensate to video signal.The sinusoidal test signal of the M different frequency that embodiment of the present invention receiving end/sending end sends；Amplitude attenuation value according to each sinusoidal test signal and frequency, generate pre-set frequency band corresponding decay amplitude-versus-frequency curve；The compensating curve minimum with the compensation error of decay amplitude-versus-frequency curve is chosen from compensating curve template base；According to the corresponding relation of compensating curve and compensating parameter, obtain the corresponding compensating parameter of compensating curve chosen.Because the embodiment of the present invention includes M sinusoidal test signal, and by monitoring the attenuation of each sinusoidal test signal, can be with the compensating curve in pre-set frequency band for the accurate match, thus more accurately determining compensating parameter.
Description
Technical field
The present invention relates to video signal treatment technique field, enter particularly to a kind of determination compensating parameter, to video signal
The method and device of row compensation deals.
Background technology
In field of video monitoring, the video capture device of front end collects video and is converted to simulation after a series of process
Video signal, analog video signal is transmitted using coaxial cable to the receiving device of rear end, during video signal transmission, letter
The species of the coaxial cable of number frequency, transmission range and employing all can have influence on the quality of video signal transmission, causes video
The loss of signal.Therefore, receiving device, after receiving video signal, needs the video signal receiving is compensated
Process, to make up loss in transmitting procedure for the video signal.
At present, receiving device is when compensating process to the video signal receiving, by detecting video signal transmission
The voltage amplitude value of row synchronous head signal in front and back, calculates the pad value of row synchronous head signal, and determines biography according to this pad value
The coaxial cable corresponding equivalent length value that defeated video signal is used, selects this equivalent length value in compensating curve template base
Corresponding compensating curve, and process is compensated to video signal according to the corresponding compensating parameter of this compensating curve.With simulation
Video signal transmission assumes the increasing trend of bandwidth, and bandwidth is bigger, transmission range is more remote, the high band of video signal with low
The decay difference of frequency range is bigger.Because prior art is when determining compensating parameter, it is the individual frequencies point pair according to ad-hoc location
The pad value answered, by the way of determining coaxial cable equivalent length value, finally determines compensating parameter, does not take into full account and regard
Other Frequency points in frequency signal band, can not compensate other frequencies well according to the compensating parameter that individual frequencies point obtains
The video signal of point, so that the compensation to video signal is not accurate enough.
In sum, determine that the method for compensating parameter can not accurately compensate to video signal at present.
Content of the invention
The present invention provides a kind of determination compensating parameter, video signal is compensated with the method and device of process, in order to solve
Certainly determine the problem that the method for compensating parameter can not accurately compensate to video signal at present.
Based on the problems referred to above, in a first aspect, the embodiment of the present invention provides a kind of method determining compensating parameter, including：
The sinusoidal test signal of the M different frequency that receiving end/sending end sends；Wherein, M frequency is by pre-set frequency band
It is divided into M sub-band, and chooses what a frequency obtained in each sub-band, described M is the positive integer not less than 3；Institute
Stating pre-set frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending；
Determine the amplitude attenuation value of each sinusoidal test signal receiving, and letter is tested according to each sine wave
Number amplitude attenuation value and frequency, generate described pre-set frequency band corresponding decay amplitude-versus-frequency curve；
According to described pre-set frequency band, choose from compensating curve template base and the compensation of described decay amplitude-versus-frequency curve misses
The minimum compensating curve of difference；
According to the corresponding relation of compensating curve and compensating parameter, obtain the corresponding compensating parameter of compensating curve chosen, with
Process is compensated to described video signal according to described compensating parameter.
Because the embodiment of the present invention is when determining compensating parameter, sinusoidal test signal is sent to receiving terminal from transmitting terminal,
Determined using compensating parameter during coaxial cable transmission by the attenuation detecting sinusoidal test signal.The embodiment of the present invention
When sending sinusoidal test signal, need the bandwidth of the video of transmission according to transmitting terminal, determine belonging to sinusoidal test signal
Pre-set frequency band；When choosing the frequency of sinusoidal test signal in pre-set frequency band, pre-set frequency band is divided into M son frequency
Band, and choose a frequency in each sub-band as the frequency of sinusoidal test signal, make to choose from pre-set frequency band
The frequency distribution going out is in whole pre-set frequency band；Be used the frequency selecting as sinusoidal test signal frequency when, energy
Enough test out attenuation in whole pre-set frequency band for the sinusoidal test signal, thus complete tests out coaxial cable pre-
If the characteristic in frequency band, compensating parameter is determined more accurately.According to pre-set frequency band corresponding decay amplitude-versus-frequency curve, mending
Repay and select in template curve storehouse to compensate the minimum compensating curve of error and this decay amplitude-versus-frequency curve between, due to pre-set frequency band
It is rationally to be determined according to the bandwidth that transmitting terminal needs the video signal sending, compensate in selection from compensating curve template base bent
More enough minimizing operation times during line, mate compensating curve faster.Because the embodiment of the present invention needs according to many in pre-set frequency band
The attenuation of individual frequency determines compensating curve, thus more accurately determining compensating parameter.
Optionally, when choosing M frequency, it is that pre-set frequency band equalization is divided into M sub-band, and selects every height
Peak frequency in frequency band；
If it is 720P, a width of 24M of band of video signal that described transmitting terminal needs the standard information of the video signal sending,
The pre-set frequency band determining is 0-25M；In the M frequency selecting, the difference of each two side frequency is 100K；
If it is 1080P that described transmitting terminal needs the standard information of the video signal sending, the band of video signal is a width of
42M, the pre-set frequency band of determination is 0-42M；In the M frequency selecting, the difference of each two side frequency is 100K.
Due to the standard information of the video signal that the embodiment of the present invention sends according to transmitting terminal, rational selection is default frequently
Band, such that it is able to prune a budget the time, mates compensating curve faster.
Optionally, described according to described pre-set frequency band, from compensating curve template base choose with described decay amplitude-frequency characteristic
The minimum compensating curve of the compensation error of curve, specifically includes：
The corresponding multiple compensating curves of described pre-set frequency band are determined from described compensating curve template base；
Determine each of the corresponding multiple compensating curves of described pre-set frequency band compensating curve and described decay amplitude-frequency characteristic
The compensation error of curve；
Choose from the corresponding multiple compensating curves of described pre-set frequency band and the compensation of described decay amplitude-versus-frequency curve misses
The minimum compensating curve of difference.
Because the embodiment of the present invention is when choosing compensating curve from compensating curve template base, first according to pre-set frequency band,
The compensating curve that all frequency bands are default frequency is determined in compensating curve template base；And calculate each compensation determined
Compensation error between curve and decay amplitude-versus-frequency curve, and choose the compensating curve compensating error minimum, thus from compensation
In template curve storehouse, fast selecting goes out the compensating curve mating with decay amplitude-versus-frequency curve, accurately to determine compensating parameter.
Optionally, each of described determination corresponding multiple compensating curves of described pre-set frequency band compensating curve is declined with described
The characteristic compensation error of amount of decrease frequency, specifically includes：
Choose N number of frequency in described pre-set frequency band, and according to described decay amplitude-versus-frequency curve, determine described N number of frequency
The corresponding amplitude attenuation value of each of rate frequency；Wherein, described N number of frequency is that described pre-set frequency band is divided into N number of son frequency
Band, chooses what a frequency obtained in each sub-band；
For any one compensating curve in the corresponding multiple compensating curves of described pre-set frequency band, compensate song according to described
Line, determines each of described N number of frequency corresponding offset of frequency；And according to the corresponding amplitude attenuation value of each frequency and
The corresponding offset of each frequency, determines each frequency corresponding compensation error；According to the corresponding compensation of each frequency
Error, determines the compensation error of described compensating curve and described decay amplitude-versus-frequency curve；
Wherein, described N is positive integer.
Because the embodiment of the present invention selects the N number of frequency being distributed in whole pre-set frequency band, calculate each frequency pair respectively
The compensation error answered；According to the compensation error of the N number of frequency determining, determine the compensating curve and described decay amplitude-frequency characteristic chosen
The compensation error of curve, thus according to the compensating curve of determination and the compensation error of described decay amplitude-versus-frequency curve to default frequency
It is estimated with the compensating curve in corresponding multiple compensating curves, with the accurate benefit chosen and mate with decay amplitude-versus-frequency curve
Repay curve.
Optionally, described according to the corresponding amplitude attenuation value of each frequency with the corresponding offset of each frequency, really
Fixed each frequency corresponding compensation error, specifically includes：
For any one frequency, by corresponding with described frequency for corresponding for described frequency amplitude attenuation value offset it
With as described frequency corresponding compensation error.
Optionally, the compensation error of described compensating curve and described decay amplitude-versus-frequency curve is determined according to the following equation：
A=k1*|a1|+k2*|a2|+······+kN*|aN|；
Wherein, described a is the compensation error of described compensating curve and described decay amplitude-versus-frequency curve, a1、a2、……aN
For frequency corresponding compensation error, k1、k2、……kNFor default weights.
Due to embodiments providing the specific compensation error determining compensating curve and decay amplitude-versus-frequency curve
Method such that it is able to exactly from compensating curve template base select with minimum with the compensation error of decay amplitude-versus-frequency curve
Compensating curve.
Second aspect, the embodiment of the present invention also provides a kind of method that video signal is compensated with process, including：
The video signal that receiving end/sending end sends；
Compensating parameter according to determining compensates process to described video signal；
Wherein, described compensating parameter is to be determined according to above-mentioned method.
Because the embodiment of the present invention determines compensating parameter according to said method, and according to the compensating parameter determining to reception
To the video signal that sends of transmitting terminal compensate process, improve the quality of video image.
The third aspect, the embodiment of the present invention also provides a kind of device determining compensating parameter, including：
First receiver module, the sinusoidal test signal of the M different frequency sending for receiving end/sending end；Wherein, M
Frequency is that pre-set frequency band is divided into M sub-band, and chooses what a frequency obtained in each sub-band, and described M is not
Positive integer less than 3；Described pre-set frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending；
First processing module, for determining the amplitude attenuation value of each sinusoidal test signal receiving, and according to
The amplitude attenuation value of each sinusoidal test signal and frequency, generate described pre-set frequency band corresponding decay amplitude-frequency characteristic bent
Line；
Selecting module, special with described decay amplitude-frequency for according to described pre-set frequency band, choosing from compensating curve template base
The minimum compensating curve of the compensation error of linearity curve；
Determining module, for the corresponding relation according to compensating curve and compensating parameter, obtains the compensating curve chosen and corresponds to
Compensating parameter, so that process is compensated to described video signal according to described compensating parameter.
Optionally, when choosing M frequency, it is that pre-set frequency band equalization is divided into M sub-band, and selects every height
Peak frequency in frequency band；
If it is 720P, a width of 24M of band of video signal that described transmitting terminal needs the standard information of the video signal sending,
The pre-set frequency band determining is 0-25M；In the M frequency selecting, the difference of each two side frequency is 100K；
If it is 1080P that described transmitting terminal needs the standard information of the video signal sending, the band of video signal is a width of
42M, the pre-set frequency band of determination is 0-42M；In the M frequency selecting, the difference of each two side frequency is 100K.
Optionally, described selecting module, specifically for：
The corresponding multiple compensating curves of described pre-set frequency band are determined from described compensating curve template base；Determine described pre-
If each of the corresponding multiple compensating curves of frequency band compensating curve and the compensation error of described decay amplitude-versus-frequency curve；From institute
State and in the corresponding multiple compensating curves of pre-set frequency band, choose the compensation minimum with the compensation error of described decay amplitude-versus-frequency curve
Curve.
Optionally, described selecting module, specifically for：
Choose N number of frequency in described pre-set frequency band, and according to described decay amplitude-versus-frequency curve, determine described N number of frequency
The corresponding amplitude attenuation value of each of rate frequency；For any one in the corresponding multiple compensating curves of described pre-set frequency band
Compensating curve, according to described compensating curve, determines each of described N number of frequency corresponding offset of frequency；And according to each
The corresponding amplitude attenuation value of individual frequency and the corresponding offset of each frequency, determine each frequency corresponding compensation error；
According to each frequency corresponding compensation error, determine that described compensating curve and the compensation of described decay amplitude-versus-frequency curve miss
Difference；Wherein, described N number of frequency is that described pre-set frequency band is divided into N number of sub-band, chooses a frequency in each sub-band
Obtain, described N is positive integer.
Optionally, described selecting module, specifically for：
For any one frequency, by corresponding with described frequency for corresponding for described frequency amplitude attenuation value offset it
With as described frequency corresponding compensation error.
Optionally, described selecting module, specifically for：
The compensation error of described compensating curve and described decay amplitude-versus-frequency curve is determined according to the following equation：
A=k1*|a1|+k2*|a2|+······+kN*|aN|；Wherein, described a be described compensating curve with described
The compensation error of decay amplitude-versus-frequency curve, a1、a2、……aNFor frequency corresponding compensation error, k1、k2、……kNIt is default
Weights.
Fourth aspect, the embodiment of the present invention provides a kind of device that video signal is compensated with process, including：
Second receiver module, the video signal sending for receiving end/sending end；
Second processing module, for compensating process according to the compensating parameter determining to described video signal；
Wherein, described compensating parameter is to be determined according to above-mentioned device.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below
Accompanying drawing briefly introduce it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
The system structure diagram that Fig. 1 transmits for embodiment of the present invention analog video signal；
Fig. 2 is the internal structure schematic diagram of the equalizer of the embodiment of the present invention；
Fig. 3 determines the method flow diagram of compensating parameter for the embodiment of the present invention；
Fig. 4 is the decay amplitude-versus-frequency curve of the embodiment of the present invention；
Fig. 5 selects the method flow diagram of compensating curve for the embodiment of the present invention；
Fig. 6 is the compensating curve of the embodiment of the present invention；
Fig. 7 determines the overall flow figure of the method for compensating parameter for the embodiment of the present invention；
Fig. 8 compensates the method flow diagram of process for the embodiment of the present invention to video signal；
Fig. 9 compensates the overall flow figure of the method for process for the embodiment of the present invention to video signal；
Figure 10 determines the structural representation of the device of compensating parameter for the embodiment of the present invention；
Figure 11 compensates the structural representation of the device of process for the embodiment of the present invention to video signal.
Specific embodiment
Transmit analog video signal when, using coaxial cable as Analogvideotransmission medium, coaxial cable material
Directly affect the quality of video signal.And the parameter of different manufacturers, unlike material, the coaxial cable of different connector head is not
Identical to the greatest extent.Therefore, before video signal transmission is simulated by coaxial cable, need the characteristic with reference to coaxial cable, accurate
The compensating parameter of true determination video signal.
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
One step ground describes in detail it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole enforcement
Example.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work
All other embodiment, broadly falls into the scope of protection of the invention.
As shown in figure 1, the system construction drawing of embodiment of the present invention analog video signal transmission, analog video signal transmission system
System includes transmitting terminal 101, receiving terminal 102, coaxial cable 103；Wherein, receiving terminal 102 includes equalizer 104, receiving device 105
With IIC (Inter-Integrated Circuit integrated circuit) bus 106.
Wherein, transmitting terminal 101：For gathering picture, and by the picture collecting be converted into analog video signal carry out send out
Send；
Coaxial cable 103：For transmitting analog video signal；
Equalizer 104：For amplitude detection is carried out to signal, and determine the compensating parameter of analog video signal；Determining
After compensating parameter, process is compensated to analog video signal；
Receiving device 105：For analog video signal is converted into digital video signal；In addition, receiving device also has
Picture analyzing ability, can be analyzed to decoded digital video signal, and is capable of the compensation ginseng of trim equalizer determination
Number；
Iic bus 106：For controlling fine setting compensating parameter.
The internal structure of the equalizer 104 of the embodiment of the present invention is as shown in Fig. 2 including signal processing module 201, amplifying mould
Block 202, supply module 203 and integrated circuit (IIC) control module 204.
Describe the method that the embodiment of the present invention determines compensating parameter with reference to Figure of description in detail.
As shown in figure 3, the embodiment of the present invention determines that the method for compensating parameter includes：
The sinusoidal test signal of the M different frequency that step 301, receiving end/sending end send；Wherein, M frequency be by
Pre-set frequency band is divided into M sub-band, and chooses what a frequency obtained in each sub-band, and described M not less than 3 is just
Integer；Described pre-set frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending；
The amplitude attenuation value of each sinusoidal test signal that step 302, determination receive, and sinusoidal according to each
The amplitude attenuation value of ripple test signal and frequency, generate described pre-set frequency band corresponding decay amplitude-versus-frequency curve；
Step 303, according to described pre-set frequency band, from compensating curve template base choose with described decay amplitude-versus-frequency curve
The minimum compensating curve of compensation error；
Step 304, the corresponding relation according to compensating curve and compensating parameter, obtain the corresponding compensation of compensating curve chosen
Parameter, to compensate process according to described compensating parameter to described video signal.
M sinusoidal test signal of the embodiment of the present invention is the sinusoidal test signal of different frequency, and this M is individual just
The frequency of string ripple test signal is located in pre-set frequency band.
Wherein, embodiment of the present invention pre-set frequency band is the video signal being needed according to transmitting terminal using coaxial cable transmission
Bandwidth determines.
If it is 720P that transmitting terminal uses the standard information of the video signal of coaxial cable transmission, the video signal pair of this 720P
The a width of 24M of band answering is it is determined that pre-set frequency band is 0-25M；If transmitting terminal uses the standard of the video signal of coaxial cable transmission
Information is 1080P, and the video signal a width of 42M of corresponding band of this 1080P is it is determined that pre-set frequency band is 0-42M.
The embodiment of the present invention after the bandwidth of the video signal being sent according to transmitting terminal determines pre-set frequency band, according to default frequency
M different frequency sinusoidal test signal chosen by band.
It should be noted that the embodiment of the present invention sinusoidal test signal is the sine wave test letter of fixed frequency
Number, and the amplitude all same of the M sinusoidal test signal chosen.
Specifically, sinusoidal test signal is chosen from pre-set frequency band according to following manner：
Needing to choose M sinusoidal test signal from pre-set frequency band, pre-set frequency band is being divided into M sub-band, from
A frequency is randomly selected as the frequency of sinusoidal test signal in each sub-band.
Optionally, pre-set frequency band equalization is divided into M sub-band, randomly selects a frequency in each sub-band
Frequency as sinusoidal test signal.
For example, pre-set frequency band is 0-25M, and the number needing the sinusoidal test signal chosen is 5, then in the sine chosen
During ripple test signal, the pre-set frequency band equalization of 0-25M is divided into 5 sub-bands, respectively：0-5M、5-10M、10-15M、
15-20M、20-25M；Choose a frequency from each sub-band respectively it is assumed that the frequency that selects be 4M, 6M, 11M,
17M, 22M, then the sinusoidal test signal chosen is：The second test letter that frequency is first test signal of 4M, frequency is 6M
Number, frequency be the 3rd test signal of 11M, frequency be the 4th test signal of 17M, frequency be the 5th test signal of 22M.
Optionally, pre-set frequency band equalization is divided into after M sub-band, using maximum frequency in each sub-band as
The frequency of sinusoidal test signal.
In enforcement, the size of each sub-band of the embodiment of the present invention is set in advance, and the size of its sub-bands refers to
The difference of maximum frequency values and minimum frequency value in this sub-band.
Pre-set frequency band equalization is divided into M sub-band by the embodiment of the present invention, and the wherein value of M is according to pre-set frequency band and son
The size of frequency band determines.For example, pre-set frequency band is 0-25M, and the size of sub-band is 1M, then M value is 25.
Optionally, if it is 720P that described transmitting terminal needs the standard information of the video signal sending, the band of video signal
A width of 24M, the pre-set frequency band of determination is 0-25M；In the M frequency selecting, the difference of each two side frequency is 100K；
If it is 1080P that described transmitting terminal needs the standard information of the video signal sending, the band of video signal is a width of
42M, the pre-set frequency band of determination is 0-42M；In the M frequency selecting, the difference of each two side frequency is 100K.
In addition, the embodiment of the present invention is before sending sinusoidal test signal, by the beginning of sinusoidal test signal and knot
It is marked at tail, so that after receiving terminal receives sinusoidal test signal, being capable of detecting when complete sinusoidal test signal.
Optionally, the transmission form of sinusoidal test signal is sBe structure；Wherein s represents start, characterizes this sine wave
Test signal starts to send；B is the signal of fixed frequency；E represents end, characterizes sinusoidal test signal and sends and terminates.
It should be noted that the transmission form of the sinusoidal test signal of the embodiment of the present invention is not limited to sBe structure, just
The transmission form of string ripple test signal can also be other derived structures similar to sBe structure, any can characterize sine wave
The transmission form that test signal sends the sinusoidal test signal of beginning and end is all applied to the present invention.
In step 302, after receiving sinusoidal test signal, the embodiment of the present invention is received using following manner determination
Each sinusoidal test signal amplitude attenuation value：
For any one sinusoidal test signal, according to the amplitude of this sinusoidal test signal before sending, and receive
The amplitude of this sinusoidal test signal arriving, determines the amplitude attenuation value of this sinusoidal test signal；
Specifically, sinusoidal test signal corresponding amplitude attenuation value is determined according to the following equation：
V=10lg (V/A)；
Wherein, v is the corresponding amplitude attenuation value of described sinusoidal test signal, and V is the described sine wave test receiving
The amplitude of signal, A is the amplitude of described sinusoidal test signal before transmission.
The embodiment of the present invention after being calculated the corresponding amplitude attenuation value of each sinusoidal test signal, according to each
The amplitude attenuation value of individual sinusoidal test signal and frequency, generate described pre-set frequency band corresponding decay amplitude-versus-frequency curve.
It should be noted that the embodiment of the present invention is according to the amplitude attenuation value of sinusoidal test signal and frequency, generate pre-
If the method that the method for frequency band corresponding decay amplitude-versus-frequency curve uses prior art, in this not go into detail.
For example, decay amplitude-versus-frequency curve as shown in Figure 4, wherein, the transverse axis of decay amplitude-versus-frequency curve is frequency, indulges
Axle is the corresponding amplitude attenuation value of frequency.
After generating decay amplitude-versus-frequency curve, the embodiment of the present invention is chosen and described decay from compensating curve template base
The minimum compensating curve of the compensation error of amplitude-versus-frequency curve.
Optionally, the corresponding multiple compensating curves of described pre-set frequency band are determined from described compensating curve template base；Really
Each of the fixed corresponding multiple compensating curves of described pre-set frequency band compensating curve and the compensation of described decay amplitude-versus-frequency curve
Error；From the corresponding multiple compensating curves of described pre-set frequency band choose with described decay amplitude-versus-frequency curve compensation error
Little compensating curve.
The compensating curve template base of the embodiment of the present invention includes the compensating curve of different frequency bands, for identical frequency band, mends
Repay and in template curve storehouse, also include multiple different compensating curves.
For example, compensating curve template base includes multiple compensating curves for 0-10M for the frequency band, frequency band is the multiple of 0-16M
Compensating curve, frequency band are multiple compensating curves of 0-24M, frequency band is multiple compensating curves of 0-42M.
The embodiment of the present invention, when determining the corresponding multiple compensating curve of pre-set frequency band from compensating curve template base, needs
The frequency band of the compensating curve chosen is not less than this pre-set frequency band, and optionally, the frequency band of compensating curve is close to pre-set frequency band.
In order to reduce amount of calculation, the embodiment of the present invention according to pre-set frequency band, selects first in compensating curve template base
The corresponding multiple compensating curves of this pre-set frequency band；Then the corresponding multiple compensating curves of this pre-set frequency band selecting are calculated respectively
Each of compensating curve with decay amplitude-versus-frequency curve compensation error.
The embodiment of the present invention is calculated each compensating curve using following manner and is missed with the compensation of decay amplitude-versus-frequency curve
Difference：
Choose N number of frequency in described pre-set frequency band, and according to described decay amplitude-versus-frequency curve, determine described N number of frequency
The corresponding amplitude attenuation value of each of rate frequency；For any one in the corresponding multiple compensating curves of described pre-set frequency band
Compensating curve, according to described compensating curve, determines each of described N number of frequency corresponding offset of frequency；And according to each
The corresponding amplitude attenuation value of individual frequency and the corresponding offset of each frequency, determine each frequency corresponding compensation error；
According to each frequency corresponding compensation error, determine that described compensating curve and the compensation of described decay amplitude-versus-frequency curve miss
Difference；Wherein, described N number of frequency is that described pre-set frequency band is divided into N number of sub-band, chooses a frequency in each sub-band
Obtain, described N is positive integer.
It should be noted that the embodiment of the present invention chooses calculating from pre-set frequency band compensates the N number of frequency used by error
Method, identical with the above-mentioned method chosen from pre-set frequency band as M frequency of sinusoidal test signal frequency, here is no longer
It is described in detail.
Specifically, as shown in figure 5, compensating curve is selected from compensating curve template base using following manner：
Step 501, choose N number of frequency in described pre-set frequency band, wherein said N is positive integer；
In enforcement, can directly use M sinusoidal test signal directly using the frequency of M sinusoidal test signal
Frequency when, M=N.
Step 502, according to described decay amplitude-versus-frequency curve, determine each of described N number of frequency corresponding width of frequency
Degree pad value；
In enforcement, when choosing N number of frequency, if randomly selecting out in the corresponding frequency range of sinusoidal test signal
N number of frequency, then according to this decay amplitude-versus-frequency curve, determine the corresponding amplitude attenuation value of N number of frequency selecting respectively；If
It is the frequency of the direct sinusoidal test signal using, then, when can be directly used in generation decay amplitude-versus-frequency curve, determine
Each sinusoidal test signal the corresponding amplitude attenuation value of frequency.
The embodiment of the present invention is selecting N number of frequency in pre-set frequency band, and determines the corresponding amplitude fading of this N number of frequency
After value, for each of the corresponding multiple compensating curves of pre-set frequency band compensating curve, execute the following step 503,504,
505.
Step 503, according to described compensating curve, determine each of described N number of frequency corresponding offset of frequency；
It should be noted that the N number of frequency in step 503 is the N number of frequency selecting in step 501.
Step 504, according to the corresponding amplitude attenuation value of each frequency and the corresponding offset of each frequency, determine every
The corresponding compensation error of one frequency；
Optionally, when determining frequency corresponding compensation error, for any one frequency, by corresponding for described frequency width
Degree pad value offset sum corresponding with described frequency, as described frequency corresponding compensation error；
For example, the corresponding amplitude attenuation value of frequency is v1, and the corresponding offset of this frequency is v2, then this frequency
Corresponding compensation error anCalculation be：an=v1+v2；Wherein, frequency corresponding amplitude attenuation value v1For negative value, frequency pair
Compensating gain value v answered2Be on the occasion of.
Step 505, according to each frequency corresponding compensation error, determine that described compensating curve is special with described decay amplitude-frequency
The compensation error of linearity curve；
Calculated after each frequency corresponding compensation error according to step 504, compensating curve is calculated using following equation
Compensation error with described decay amplitude-versus-frequency curve：
A=k1*|a1|+k2*|a2|+······+kN*|aN|；Wherein, described a be described compensating curve with described
The compensation error of decay amplitude-versus-frequency curve, a1、a2、……aNFor frequency corresponding compensation error, k1、k2、……kNIt is default
Weights；
Optionally, k1=k2==kN=1.
K in the embodiment of the present invention1、k2、……kNThe analog video signal that can send as needed is set in advance
Put.When the frequency determining the analog video signal needing to send concentrates on a certain frequency, can suitably increase this frequency and correspond to
Weights.
For example, pre-set frequency band be 0-30M, from pre-set frequency band choose ten frequencies be respectively 3M, 6M, 9M, 12M,
15M、18M、21M、24M、27M、30M；In the frequency set determining the analog video signal needing to transmit by this coaxial cable
In 20M, and assume that the corresponding weights of 18M are k6, the corresponding weights of 21M are k7, then corresponding in calculating sinusoidal test signal
When compensating error, can select to increase k6And k7Value.
Step 506, from the corresponding multiple compensating curves of described pre-set frequency band choose with described decay amplitude-versus-frequency curve
The minimum compensating curve of compensation error.
For decay amplitude-versus-frequency curve as described in Figure 4, preferably compensating curve is as shown in Figure 6.
As shown in fig. 7, the embodiment of the present invention determines the overall flow figure of the method for compensating parameter.
The sinusoidal test signal of the M different frequency that step 701, receiving end/sending end send；Wherein, M frequency be by
Pre-set frequency band is divided into M sub-band, and chooses what a frequency obtained in each sub-band, and described M not less than 3 is just
Integer；Described pre-set frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending；
The amplitude attenuation value of each sinusoidal test signal that step 702, determination receive；
Step 703, the amplitude attenuation value according to each sinusoidal test signal and frequency, generate described pre-set frequency band pair
The decay amplitude-versus-frequency curve answered；
Step 704, determine the corresponding multiple compensating curves of described pre-set frequency band from compensating curve template base；
Step 705, in described pre-set frequency band, choose N number of frequency, and according to described decay amplitude-versus-frequency curve, determine institute
State the corresponding amplitude attenuation value of each of N number of frequency frequency；Wherein, described N number of frequency is that described pre-set frequency band is divided into N
Individual sub-band, chooses what a frequency obtained in each sub-band；
For each of the corresponding multiple compensating curves of pre-set frequency band compensating curve, execution step 706～709；
Step 706, according to described compensating curve, determine each of described N number of frequency corresponding offset of frequency；
Step 707, according to the corresponding amplitude attenuation value of each frequency and the corresponding offset of each frequency, determine every
The corresponding compensation error of one frequency；
Step 708, according to each frequency corresponding compensation error, determine that described compensating curve is special with described decay amplitude-frequency
The compensation error of linearity curve；
Step 709, according to each of corresponding multiple compensating curves of pre-set frequency band compensating curve corresponding compensation error,
Choose from the corresponding multiple compensating curves of described pre-set frequency band and the compensation error minimum of described decay amplitude-versus-frequency curve
Compensating curve.
The embodiment of the present invention also provides a kind of compensating parameter determined using said method, and video signal is compensated
The method processing.
As shown in figure 8, the method that the embodiment of the present invention compensates process to video signal includes：
The video signal that step 801, receiving end/sending end send；
Step 802, according to determine compensating parameter process is compensated to described video signal；
Wherein, described compensating parameter is the method determination according to above-mentioned determination compensating parameter.
It should be noted that the embodiment of the present invention determines that the method for compensating parameter uses the side providing in the above
Method, in this not go into detail.
With reference to transmitting terminal and receiving terminal, the method that compensated video signal is processed is described in detail.
As shown in figure 9, the method that embodiment of the present invention compensated video signal is processed includes：
Whether there is medium to connect between step 901, detection transmitting terminal and receiving terminal, that is, be transmitted between end and receiving terminal
Load detecting；
Specifically, the method that the method for load detecting adopts prior art, for example with detection voltage value, or using inspection
Survey the mode of current value.
Step 902, transmitting terminal send request signal to receiving terminal, survey in order to inquire whether receiving terminal can send sine wave
Trial signal；
Step 903, transmitting terminal judge that the confirmation whether receiving receiving terminal return in the first setting duration sends information,
If so, execution step 904；If it is not, execution step 908；
In enforcement, it can be heartbeat signal that the confirmation that receiving terminal returns sends information, receive receiving terminal in transmitting terminal and return
After the heartbeat signal returning, confirmation can send sinusoidal test signal.
Step 904, transmitting terminal send the sinusoidal test signal of M different frequency to receiving terminal；Wherein, M frequency is
Pre-set frequency band is divided into M sub-band, and chooses what a frequency obtained in each sub-band, described M is not less than 3
Positive integer；Described pre-set frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending；
Step 905, receiving terminal determine compensating parameter according to the sinusoidal test signal receiving.
Specifically, receiving terminal is determined using the method determining compensating parameter provided in an embodiment of the present invention.
After step 906, transmitting terminal the second setting duration after sending sinusoidal test signal, send to receiving terminal and regard
Frequency signal；
Wherein this second a length of when setting pre-set, and this second setting duration is to be determined according to receiving terminal to compensate
The duration of parameter determines, this second setting duration determines the duration needed for compensating parameter not less than receiving terminal.
Step 907, receiving terminal compensate process according to the compensating parameter determining to the analog video signal receiving.
Step 908, transmitting terminal send analog video signal to receiving terminal.
Step 909, receiving terminal compensate process according to original compensation deals mode to analog video signal.
Wherein, original compensation deals mode is the compensation way of prior art, and for example, original compensation deals mode can
To be by detecting colour synchronisation head amplitude and color carrier amplitude, determining the mode of compensating parameter.The embodiment of the present invention is to original
Compensation way be not defined.
Step 910, receiving terminal carry out video decoding to the analog video signal after compensation deals, and video signal is carried out
Analysis, and compensating parameter is finely tuned according to analysis result.
Based on same inventive concept, additionally provide a kind of device determining compensating parameter in the embodiment of the present invention, due to this
The method that the principle of device solve problem determines compensating parameter to the embodiment of the present invention is similar, and the therefore enforcement of this device can be joined
The enforcement of square method, repeats no more in place of repetition.
As shown in Figure 10, the embodiment of the present invention determines the device of compensating parameter, including：
First receiver module 1001, the sinusoidal test signal of the M different frequency sending for receiving end/sending end；Its
In, M frequency is that pre-set frequency band is divided into M sub-band, and chooses what a frequency obtained in each sub-band, described
M is the positive integer not less than 3；Described pre-set frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending
's；
First processing module 1002, for determining the amplitude attenuation value of each sinusoidal test signal receiving, and
Amplitude attenuation value according to each sinusoidal test signal and frequency, generate described pre-set frequency band corresponding decay amplitude-frequency characteristic
Curve；
Selecting module 1003, for according to described pre-set frequency band, choosing and described decay width from compensating curve template base
Frequently the characteristic compensating curve compensating error minimum；
Determining module 1004, for the corresponding relation according to compensating curve and compensating parameter, obtains the compensating curve chosen
Corresponding compensating parameter, to compensate process according to described compensating parameter to described video signal.
Optionally, when choosing M frequency, it is that pre-set frequency band equalization is divided into M sub-band, and selects every height
Peak frequency in frequency band；
If it is 720P, a width of 24M of band of video signal that described transmitting terminal needs the standard information of the video signal sending,
The pre-set frequency band determining is 0-25M；In the M frequency selecting, the difference of each two side frequency is 100K；
If it is 1080P that described transmitting terminal needs the standard information of the video signal sending, the band of video signal is a width of
42M, the pre-set frequency band of determination is 0-42M；In the M frequency selecting, the difference of each two side frequency is 100K.
Optionally, described selecting module 1003, specifically for：
The corresponding multiple compensating curves of described pre-set frequency band are determined from described compensating curve template base；Determine described pre-
If each of the corresponding multiple compensating curves of frequency band compensating curve and the compensation error of described decay amplitude-versus-frequency curve；From institute
State and in the corresponding multiple compensating curves of pre-set frequency band, choose the compensation minimum with the compensation error of described decay amplitude-versus-frequency curve
Curve.
Optionally, described selecting module 1003, specifically for：
Choose N number of frequency in described pre-set frequency band, and according to described decay amplitude-versus-frequency curve, determine described N number of frequency
The corresponding amplitude attenuation value of each of rate frequency；For any one in the corresponding multiple compensating curves of described pre-set frequency band
Compensating curve, according to described compensating curve, determines each of described N number of frequency corresponding offset of frequency；And according to each
The corresponding amplitude attenuation value of individual frequency and the corresponding offset of each frequency, determine each frequency corresponding compensation error；
According to each frequency corresponding compensation error, determine that described compensating curve and the compensation of described decay amplitude-versus-frequency curve miss
Difference；Wherein, described N number of frequency is that described pre-set frequency band is divided into N number of sub-band, chooses a frequency in each sub-band
Obtain, described N is positive integer.
Optionally, described selecting module 1003, specifically for：
For any one frequency, by corresponding with described frequency for corresponding for described frequency amplitude attenuation value offset it
With as described frequency corresponding compensation error.
Optionally, described selecting module 1003, specifically for：
The compensation error of described compensating curve and described decay amplitude-versus-frequency curve is determined according to the following equation：
A=k1* | a1 |+k2*|a2|+······+kN*|aN|；Wherein, described a be described compensating curve with described
The compensation error of decay amplitude-versus-frequency curve, a1、a2、……aNFor frequency corresponding compensation error, k1、k2、……kNIt is default
Weights.、
Based on same inventive concept, in the embodiment of the present invention, additionally provide a kind of dress that video signal is compensated with process
Put, because the principle of this device solve problem is similar to the method that the embodiment of the present invention compensates process to video signal, because
The enforcement of this this device may refer to the enforcement of method, repeats no more in place of repetition.
As shown in figure 11, the embodiment of the present invention compensates the device of process to video signal, including：
Second receiver module 1101, the video signal sending for receiving end/sending end；
Second processing module 1102, for compensating process according to the compensating parameter determining to described video signal；
Wherein, described compensating parameter is that the device determining compensating parameter according to embodiments of the present invention determines.
Frame above by reference to the method illustrating according to the embodiment of the present application, device (system) and/or computer program
Figure and/or flow chart describe the application.It should be understood that block diagram and/or flow process diagram can be realized by computer program instructions
The combination of the block of one block of figure and block diagram and/or flowchart illustration.These computer program instructions can be supplied to logical
With computer, the processor of special-purpose computer and/or other programmable data processing unit, by produce machine so that via in terms of
The instruction of calculation machine processor and/or other programmable data processing unit execution creates and is used for realizing block diagram and/or flow chart block
In specified function/action method.
Correspondingly, the application can also be implemented with hardware and/or software (including firmware, resident software, microcode etc.).More
Further, the application can take computer can using or computer-readable recording medium on computer program shape
Formula, it has the computer realized in media as well and can use or computer readable program code, to be made by instruction execution system
With or combined command execution system and use.In the present context, computer can use or computer-readable medium is permissible
It is arbitrary medium, it can comprise, store, communicating, transmission or transmission program, to be made by instruction execution system, device or equipment
With, or combined command execution system, device or equipment use.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprise these changes and modification.
Claims (14)
1. a kind of method determining compensating parameter is it is characterised in that the method includes：
The sinusoidal test signal of the M different frequency that receiving end/sending end sends；Wherein, M frequency is to divide pre-set frequency band
For M sub-band, and choose what a frequency obtained in each sub-band, described M is the positive integer not less than 3；Described pre-
If frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending；
Determine the amplitude attenuation value of each sinusoidal test signal receiving, and according to each sinusoidal test signal
Amplitude attenuation value and frequency, generate described pre-set frequency band corresponding decay amplitude-versus-frequency curve；
According to described pre-set frequency band, choose from compensating curve template base with the compensation error of described decay amplitude-versus-frequency curve
Little compensating curve；
According to the corresponding relation of compensating curve and compensating parameter, obtain the corresponding compensating parameter of compensating curve chosen, with basis
Described compensating parameter compensates process to described video signal.
2. the method for claim 1 is it is characterised in that when choosing M frequency, be to be divided into pre-set frequency band equalization
M sub-band, and select the peak frequency in each sub-band；
If it is 720P, a width of 24M of band of video signal that described transmitting terminal needs the standard information of the video signal sending, determine
Pre-set frequency band be 0-25M；In the M frequency selecting, the difference of each two side frequency is 100K；
If it is 1080P, a width of 42M of band of video signal that described transmitting terminal needs the standard information of the video signal sending, really
Fixed pre-set frequency band is 0-42M；In the M frequency selecting, the difference of each two side frequency is 100K.
3. the method for claim 1 it is characterised in that described according to described pre-set frequency band, from compensating curve template base
The middle compensating curve chosen with the compensation error minimum of described decay amplitude-versus-frequency curve, specifically includes：
The corresponding multiple compensating curves of described pre-set frequency band are determined from described compensating curve template base；
Determine each of the corresponding multiple compensating curves of described pre-set frequency band compensating curve and described decay amplitude-versus-frequency curve
Compensation error；
From the corresponding multiple compensating curves of described pre-set frequency band choose with described decay amplitude-versus-frequency curve compensation error
Little compensating curve.
4. method as claimed in claim 3 is it is characterised in that the corresponding multiple compensating curves of the described pre-set frequency band of described determination
Each of compensating curve with described decay amplitude-versus-frequency curve compensation error, specifically include：
Choose N number of frequency in described pre-set frequency band, and according to described decay amplitude-versus-frequency curve, determine in described N number of frequency
The corresponding amplitude attenuation value of each frequency；Wherein, described N number of frequency is that described pre-set frequency band is divided into N number of sub-band,
Choose what a frequency obtained in each sub-band；
For any one compensating curve in the corresponding multiple compensating curves of described pre-set frequency band, according to described compensating curve,
Determine each of described N number of frequency corresponding offset of frequency；And according to the corresponding amplitude attenuation value of each frequency and every
The corresponding offset of one frequency, determines each frequency corresponding compensation error；Missed according to corresponding compensation of each frequency
Difference, determines the compensation error of described compensating curve and described decay amplitude-versus-frequency curve；
Wherein, described N is positive integer.
5. method as claimed in claim 4 is it is characterised in that described according to the corresponding amplitude attenuation value of each frequency and every
The corresponding offset of one frequency, determines each frequency corresponding compensation error, specifically includes：
For any one frequency, by corresponding with described frequency for corresponding for described frequency amplitude attenuation value offset sum, make
For described frequency corresponding compensation error.
6. method as claimed in claim 4 is it is characterised in that be determined according to the following equation described compensating curve and described decay
The compensation error of amplitude-versus-frequency curve：
A=k1*|a1|+k2*|a2|+······+kN*|aN|；
Wherein, described a is the compensation error of described compensating curve and described decay amplitude-versus-frequency curve, a1、a2、……aNFor frequency
Rate corresponding compensation error, k1、k2、……kNFor default weights.
7. a kind of method that video signal is compensated with process is it is characterised in that the method includes：
The video signal that receiving end/sending end sends；
Compensating parameter according to determining compensates process to described video signal；
Wherein, described compensating parameter is the method determination according to any one of claim 1～6.
8. a kind of device determining compensating parameter is it is characterised in that include：
First receiver module, the sinusoidal test signal of the M different frequency sending for receiving end/sending end；Wherein, M frequency
It is that pre-set frequency band is divided into M sub-band, and chooses what a frequency obtained in each sub-band, described M is not less than 3
Positive integer；Described pre-set frequency band is to be determined according to the bandwidth that described transmitting terminal needs the video signal sending；
First processing module, for determining the amplitude attenuation value of each sinusoidal test signal receiving, and according to each
The amplitude attenuation value of individual sinusoidal test signal and frequency, generate described pre-set frequency band corresponding decay amplitude-versus-frequency curve；
Selecting module, bent with described decay amplitude-frequency characteristic for according to described pre-set frequency band, choosing from compensating curve template base
The minimum compensating curve of the compensation error of line；
Determining module, for the corresponding relation according to compensating curve and compensating parameter, obtains the corresponding benefit of compensating curve chosen
Repay parameter, so that process is compensated to described video signal according to described compensating parameter.
9. device as claimed in claim 8 is it is characterised in that when choosing M frequency, be to be divided into pre-set frequency band equalization
M sub-band, and select the peak frequency in each sub-band；
If it is 720P, a width of 24M of band of video signal that described transmitting terminal needs the standard information of the video signal sending, determine
Pre-set frequency band be 0-25M；In the M frequency selecting, the difference of each two side frequency is 100K；
If it is 1080P, a width of 42M of band of video signal that described transmitting terminal needs the standard information of the video signal sending, really
Fixed pre-set frequency band is 0-42M；In the M frequency selecting, the difference of each two side frequency is 100K.
10. device as claimed in claim 8 is it is characterised in that described selecting module, specifically for：
The corresponding multiple compensating curves of described pre-set frequency band are determined from described compensating curve template base；Determine described default frequency
Compensation error with each of corresponding multiple compensating curves compensating curve and described decay amplitude-versus-frequency curve；From described pre-
If choosing the compensating curve minimum with the compensation error of described decay amplitude-versus-frequency curve in the corresponding multiple compensating curves of frequency band.
11. devices as claimed in claim 8 it is characterised in that described selecting module, specifically for：
Choose N number of frequency in described pre-set frequency band, and according to described decay amplitude-versus-frequency curve, determine in described N number of frequency
The corresponding amplitude attenuation value of each frequency；For any one compensation in the corresponding multiple compensating curves of described pre-set frequency band
Curve, according to described compensating curve, determines each of described N number of frequency corresponding offset of frequency；And according to each frequency
The corresponding amplitude attenuation value of rate and the corresponding offset of each frequency, determine each frequency corresponding compensation error；According to
Each frequency corresponding compensation error, determines the compensation error of described compensating curve and described decay amplitude-versus-frequency curve；Its
In, described N number of frequency is that described pre-set frequency band is divided into N number of sub-band, chooses a frequency and obtain in each sub-band
, described N is positive integer.
12. devices as claimed in claim 11 it is characterised in that described selecting module, specifically for：
For any one frequency, by corresponding with described frequency for corresponding for described frequency amplitude attenuation value offset sum, make
For described frequency corresponding compensation error.
13. devices as claimed in claim 11 it is characterised in that described selecting module, specifically for：
The compensation error of described compensating curve and described decay amplitude-versus-frequency curve is determined according to the following equation：
A=k1*|a1|+k2*|a2|+······+kN*|aN|；Wherein, described a is described compensating curve and described decay
The compensation error of amplitude-versus-frequency curve, a1、a2、……aNFor frequency corresponding compensation error, k1、k2、……kNFor default power
Value.
A kind of 14. devices that video signal is compensated with process are it is characterised in that include：
Second receiver module, the video signal sending for receiving end/sending end；
Second processing module, for compensating process according to the compensating parameter determining to described video signal；
Wherein, described compensating parameter is the device determination described according to Claim 8～13 any one.
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