CN105992002A - Method of correcting composite video signal frequency offset and equipment thereof - Google Patents
Method of correcting composite video signal frequency offset and equipment thereof Download PDFInfo
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- CN105992002A CN105992002A CN201510073086.5A CN201510073086A CN105992002A CN 105992002 A CN105992002 A CN 105992002A CN 201510073086 A CN201510073086 A CN 201510073086A CN 105992002 A CN105992002 A CN 105992002A
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Abstract
Embodiments of the invention provide a method of correcting a composite video signal frequency offset and equipment thereof. In the prior art, a normalization frequency of a digital image processing unit and a normalization frequency of a composite video encoder have an offset so that data losses are generated when the two carry out data interaction. By using the method and the equipment of the invention, the above problem is solved. The method comprises the following steps of according to a current first normalization frequency of the digital image processing unit and a current second normalization frequency of the composite video encoder, determining whether a line number of a rear blanking zone of a current composite video signal needs to be adjusted; after the line number of the rear blanking zone of the current composite video signal needs to be adjusted, according to the first normalization frequency and the second normalization frequency, determining line number adjusting information; and sending the determined line number adjusting information to the composite video encoder. By using the method of the invention, when the digital image processing unit and the composite video encoder carry out the data interaction, data losses are not generated.
Description
Technical field
The present invention relates to field of computer technology, particularly to a kind of method correcting composite video signal frequency deviation
And equipment.
Background technology
The current composite video signal that utilizes carries out the system of image transmitting, including imageing sensor, digitized map
As processing unit, composite video encoder, composite video decoder and display/memory element.Within the system,
Digital image processing unit and composite video encoder unit can carry out data interaction, when Digital Image Processing list
The frame per second of frame per second and the composite video encoder of unit is in the case of frame per second is consistent, at digital image processing unit
Managed time of a two field picture and composite video encoder to have encoded time of a two field picture be identical.
Although digital image processing unit and compound video code unit may enter respectively with the clock of different frequency
Row data process, but both frequencies are after being normalized operation, and the normalized frequency obtained is consistent
, and then both frame per second are consistent.
In the ideal case, composite video signal is utilized to carry out the Digital Image Processing in the system of image transmitting
The normalized frequency of unit is to maintain consistent with the normalized frequency of composite video encoder, and both process one
The time of two field picture is also identical, and then both are during carrying out data interaction, do not result in data
Loss.Then, carry out in the system of image transmitting, due to frequency in the actual composite video signal that utilizes
Reason, the normalized frequency of digital image processing unit and the returning of composite video encoder such as deviation (frequency deviation)
One changes frequency can exist deviation, and both process the time of a two field picture can be different, and then both are carrying out data
During Jiao Hu, the loss of data can be caused.
In sum, the normalized frequency of current digital image processing unit and returning of composite video encoder
One changes frequency can exist deviation, and both can cause the loss of data during carrying out data interaction.
Summary of the invention
The present invention provides a kind of method and apparatus correcting composite video signal frequency deviation, in order to solve prior art
Present in the normalized frequency of current digital image processing unit and the normalization of composite video encoder
Can there is deviation in frequency, both are during carrying out data interaction, the problem that can cause the loss of data.
The embodiment of the present invention provides a kind of method correcting composite video signal frequency deviation, including:
First normalized frequency current according to digital image processing unit and composite video encoder are current
Second normalized frequency, it may be judged whether need the line number in the final blanking district of current composite video signal is carried out
Adjust；
After determining that the line number in the final blanking district of current composite video signal is adjusted by needs, according to institute
State the first normalized frequency and described second normalized frequency determines line number adjustment information；
The described line number adjustment information determined is sent to described composite video encoder, so that described being combined regards
Frequently described composite video signal is being carried out in cataloged procedure by encoder, adjusts according to the described line number received
The line number in the final blanking district of described composite video signal is adjusted by information.
Owing to the embodiment of the present invention is compiled in the current normalized frequency of digital image processing unit and composite video
When the code current normalized frequency of device exists frequency deviation, composite video encoder is to current composite video signal
Carry out in cataloged procedure, the line number in the final blanking district of this composite video signal can be adjusted, so that digital
The normalized frequency of graphics processing unit reaches consistent with the normalized frequency of composite video encoder, and then makes
Both during carrying out data interaction, do not result in the loss of data.
Judge whether described in it is preferred that to need the line number in the final blanking district of current composite video signal is carried out
Adjust, including:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
It is not less than the first setting threshold value, it is determined that need described multiple with the first difference of described second normalized frequency
The line number in the final blanking district closing video signal is adjusted；Or
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
It is not less than the second setting threshold value, it is determined that need described multiple with the second difference of described first normalized frequency
The line number in the final blanking district closing video signal is adjusted.
Due to the embodiment of the present invention can according to the first normalized frequency and the magnitude relationship of the second normalized frequency,
And setting threshold value, it is achieved judge whether that the line number needing the final blanking district to composite video signal is adjusted
Whole, it is achieved mode is easier.
It is preferred that described line number adjustment information includes adjustment mode；
Described according to described first normalized frequency with described second normalized frequency, determine that line number adjusts letter
Breath, including:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
Set threshold value with the first difference of described second normalized frequency not less than first, determine composite video signal
The mode that is adjusted of the line number in final blanking district for reducing operation；Or
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
Set threshold value with the second difference of described first normalized frequency not less than second, determine composite video signal
The mode that is adjusted of the line number in final blanking district for increasing operation.
It is preferred that described line number adjustment information includes adjusting line number；
Described determine line number adjustment information according to described first normalized frequency and described second normalized frequency,
Including:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
With the first difference of described second normalized frequency not less than the first setting threshold value, according to the first difference range and
First the first corresponding relation adjusting line number, determines the first difference range belonging to described first difference, will really
Fixed described first difference range corresponding first adjustment line number as adjust line number；Or
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
With the second difference of described first normalized frequency not less than the second setting threshold value, according to the second difference range and
Second the second corresponding relation adjusting line number, determines the second difference range belonging to described second difference, will really
Fixed described second difference range corresponding second adjustment line number as adjust line number.
It is preferred that described, the first corresponding for described first difference range determined adjustment line number is gone as adjustment
After number, before the described line number adjustment information determined is sent to described composite video encoder, also include:
When described adjustment line number is more than the line number in the final blanking district of described composite video signal, according to described multiple
The line number in the final blanking district closing video signal adjusts described adjustment line number.
Owing to the embodiment of the present invention is when adjusting line number more than the line number in the final blanking district of composite video signal, meeting
The line number in the final blanking district according to composite video signal adjusts line number, it is ensured that composite video encoder
Reduce the effectiveness of operation.
The embodiment of the present invention provides a kind of method correcting composite video signal frequency deviation, including:
Composite video encoder receives line number adjustment information；
Current composite video signal is being carried out in cataloged procedure, according to reception by described composite video encoder
To described line number adjustment information the line number in the final blanking district of described composite video signal is adjusted.
Due to embodiment of the present invention composite video encoder according to the line number adjustment information received to current
The line number in the final blanking district of composite video signal is adjusted, so that the normalization frequency of digital image processing unit
Rate reaches consistent with the normalized frequency of composite video encoder, and then makes both carry out data interaction
During, do not result in the loss of data.
It is preferred that described line number adjustment information comprises adjustment mode and/or adjusts line number.
The embodiment of the present invention provides a kind of equipment correcting composite video signal frequency deviation, including:
Judge module, for first normalized frequency current according to digital image processing unit and composite video
The second normalized frequency that encoder is current, it may be judged whether need the final blanking to current composite video signal
The line number in district is adjusted；
Determine module, for determining that the line number in the final blanking district of current composite video signal is carried out by needs
After adjustment, determine line number adjustment information according to described first normalized frequency and described second normalized frequency；
Sending module, for the described line number adjustment information determined is sent to described composite video encoder,
So that described composite video signal is being carried out in cataloged procedure, according to receiving by described composite video encoder
Described line number adjustment information the line number in the final blanking district of described composite video signal is adjusted.
It is preferred that described judge module specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
It is not less than the first setting threshold value, it is determined that need described multiple with the first difference of described second normalized frequency
The line number in the final blanking district closing video signal is adjusted；If or described first normalized frequency is less than described the
Two normalized frequencies, and described second normalized frequency is the least with the second difference of described first normalized frequency
Threshold value is set, it is determined that need the line number in the final blanking district of described composite video signal is adjusted in second
Whole.
It is preferred that described line number adjustment information includes adjustment mode；
Described determine module specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
Set threshold value with the first difference of described second normalized frequency not less than first, determine composite video signal
The mode that is adjusted of the line number in final blanking district for reducing operation；If or described first normalized frequency is less than
Described second normalized frequency, and described second normalized frequency is poor with the second of described first normalized frequency
Value, not less than the second setting threshold value, determines the side that the line number in the final blanking district to composite video signal is adjusted
Formula is for increasing operation.
It is preferred that described line number adjustment information includes adjusting line number；
Described determine module specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
With the first difference of described second normalized frequency not less than the first setting threshold value, according to the first difference range and
First the first corresponding relation adjusting line number, determines the first difference range belonging to described first difference, will really
Fixed described first difference range corresponding first adjustment line number as adjust line number；If or described first normalizing
Change frequency and be less than described second normalized frequency, and described second normalized frequency is with described first normalization frequently
Second difference of rate, not less than the second setting threshold value, adjusts the second of line number according to the second difference range and second
Corresponding relation, determines the second difference range belonging to described second difference, the described second difference model that will determine
Enclose the second adjustment line number of correspondence as adjusting line number.
Determine that module is additionally operable to it is preferred that described:
When described adjustment line number is more than the line number in the final blanking district of described composite video signal, according to described multiple
The line number in the final blanking district closing video signal adjusts described adjustment line number.
Owing to the embodiment of the present invention is compiled in the current normalized frequency of digital image processing unit and composite video
When the code current normalized frequency of device exists frequency deviation, composite video encoder is to current composite video signal
Carry out in cataloged procedure, the line number in the final blanking district of this composite video signal can be adjusted, so that digital
The normalized frequency of graphics processing unit reaches consistent with the normalized frequency of composite video encoder, and then makes
Both during carrying out data interaction, do not result in the loss of data.
The embodiment of the present invention provides a kind of composite video encoder correcting composite video signal frequency deviation, including:
Receiver module, is used for receiving line number adjustment information；
Adjusting module, for carrying out in cataloged procedure to current composite video signal, according to receive
The line number in the final blanking district of described composite video signal is adjusted by described line number adjustment information.
It is preferred that described line number adjustment information comprises adjustment mode and/or adjusts line number.
Due to embodiment of the present invention composite video encoder according to the line number adjustment information received to current
The line number in the final blanking district of composite video signal is adjusted, so that the normalization frequency of digital image processing unit
Rate reaches consistent with the normalized frequency of composite video encoder, and then makes both carry out data interaction
During, do not result in the loss of data.
Accompanying drawing explanation
Fig. 1 is dividing of the front blanking zone of the embodiment of the present invention one composite video signal, final blanking district and effective district
Cloth schematic diagram；
Fig. 2 is the method flow schematic diagram that the embodiment of the present invention two corrects composite video signal frequency deviation；
Fig. 3 is the method flow schematic diagram that the embodiment of the present invention three corrects composite video signal frequency deviation；
Fig. 4 is the method flow schematic diagram that the embodiment of the present invention four corrects composite video signal frequency deviation；
Fig. 5 is the device structure schematic diagram that the embodiment of the present invention five corrects composite video signal frequency deviation；
Fig. 6 is the composite video encoder structural representation that the embodiment of the present invention six corrects composite video signal frequency deviation
Figure.
Detailed description of the invention
The embodiment of the present invention provides a kind of method correcting composite video signal frequency deviation: according to Digital Image Processing
The first normalized frequency that unit is current and current the second normalized frequency of composite video encoder, it is judged that be
The line number in the final blanking district of current composite video signal is adjusted by no needs；Determining that needs are to currently
The line number in final blanking district of composite video signal be adjusted after, according to described first normalized frequency and institute
State the second normalized frequency and determine line number adjustment information；The described line number adjustment information determined is sent to described
Composite video encoder, so that described composite video signal is being carried out encoded by described composite video encoder
Cheng Zhong, according to the described line number adjustment information the received line number to the final blanking district of described composite video signal
It is adjusted.Owing to the embodiment of the present invention regards with compound in the normalized frequency that digital image processing unit is current
Frequently, when the normalized frequency that encoder is current exists frequency deviation, composite video encoder is to current composite video
Signal carries out in cataloged procedure, can be adjusted the line number in the final blanking district of this composite video signal, so that
The normalized frequency of digital image processing unit reaches consistent with the normalized frequency of composite video encoder, enters
And make both during carrying out data interaction, do not result in the loss of data.
The method that embodiment of the present invention offer another kind corrects composite video signal frequency deviation: composite video encoder
Receive line number adjustment information；Current composite video signal is being encoded by described composite video encoder
During, according to the described line number adjustment information the received row to the final blanking district of described composite video signal
Number is adjusted.Owing to embodiment of the present invention composite video encoder is according to the line number adjustment information pair received
The line number in the final blanking district of current composite video signal is adjusted, so that the returning of digital image processing unit
One changes frequency reaches consistent with the normalized frequency of composite video encoder, and then makes both carry out data
During Jiao Hu, do not result in the loss of data.
Wherein, the embodiment of the present invention utilizes in the system that composite video signal carries out image transmitting different,
Using different frequency departure determination methods, the normalized frequency of gained is different.
Wherein, the composite video signal in the embodiment of the present invention is for including front blanking zone, final blanking district and effectively
The composite video signal in district, and the time span in final blanking district can be that (X is for more than or equal to 1 for X row
Natural number).The front blanking zone of composite video signal, final blanking district and the distribution in effective district, concrete can
To see Fig. 1 (the front blanking zone of the embodiment of the present invention one composite video signal, final blanking district and effective district
Distribution schematic diagram), as can be known from Fig. 1, K (K is the positive integer more than or equal to 1) frame composite video
The distribution in three districts of signal and K+1 frame composite video signal is followed successively by: front blanking zone, effective district and after
Blanking zone.
The time span in embodiment of the present invention composite video signal final blanking district: (X is more than or equal to 1 to X row
Natural number), be according to utilizing composite video signal to carry out the default of image transmitting accordingly, and
And when the line number in final blanking district is adjusted, if adjusting line number to be not more than X row, front blanking zone all can be made
With the function that the final blanking district after adjustment meets blanking and synchronization.
The embodiment of the present invention, according to the difference of system utilizing composite video signal to carry out image transmitting, compound regards
Frequently the time span in the front blanking zone of signal, final blanking district and effective district is also different.Such as: for
1080P system, total time span of composite video signal is 1125 row, wherein the time span in effective district
Being 1080 row, the time span of front blanking zone is 40 row, and the time span in final blanking district is 5 row.Example again
As: for 720P system, total time span of composite video signal is 750 row, wherein effective district
Time span is 720 row, and the time span of front blanking zone is 25 row, and the time span in final blanking district is 5
OK.Above-mentioned simply as a example by 1080P system and 720P system, the front blanking of concrete composite video signal
District, final blanking district and the time span in effective district, can determine corresponding time span according to corresponding system.
As in figure 2 it is shown, the method that the embodiment of the present invention two corrects composite video signal frequency deviation includes:
Step 100, according to current the first normalized frequency of digital image processing unit and compound video code
The second normalized frequency that device is current, it may be judged whether need the final blanking district to current composite video signal
Line number is adjusted；
Step 101, need the line number in the final blanking district of current composite video signal is adjusted determining
After, determine line number adjustment information according to described first normalized frequency and described second normalized frequency；
Step 102, the described line number adjustment information determined is sent to described composite video encoder, so that
Described composite video signal is being carried out in cataloged procedure by described composite video encoder, according to the institute received
State line number adjustment information the line number in the final blanking district of described composite video signal is adjusted.
The embodiment of the present invention can use following method to judge whether to need current composite video signal
The line number in final blanking district is adjusted:
Mode one:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
It is not less than the first setting threshold value, it is determined that need described multiple with the first difference of described second normalized frequency
The line number in the final blanking district closing video signal is adjusted.
The embodiment of the present invention is more than the second normalized frequency, and the first normalized frequency in the first normalized frequency
In the case of setting threshold value with the first difference of the second normalized frequency not less than first, composite video is utilized to believe
Number carry out the digital image processing unit in the system of image transmitting to process time of a two field picture and to be faster than multiple
Closing video encoder and encode the time of a two field picture, both normalized frequencies are inconsistent, and both are counting
According to time mutual, the loss of data can be caused, it is therefore desirable to the line number in the final blanking district of composite video signal is entered
Row sum-equal matrix, so that both normalized frequencies reach consistent, and then makes both when carrying out data interaction,
Do not result in the loss of data.
Mode two:
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
It is not less than the second setting threshold value, it is determined that need described multiple with the second difference of described first normalized frequency
The line number in the final blanking district closing video signal is adjusted.
The embodiment of the present invention is less than the second normalized frequency, and the second normalized frequency in the first normalized frequency
In the case of setting threshold value with the second difference of the first normalized frequency not less than second, composite video is utilized to believe
Number carry out the digital image processing unit in the system of image transmitting to process time of a two field picture and to be slower than multiple
Closing video encoder and encode the time of a two field picture, both normalized frequencies are inconsistent, and both are counting
According to time mutual, the loss of data can be caused, it is therefore desirable to the line number in the final blanking district of composite video signal is entered
Row sum-equal matrix, so that both normalized frequencies reach consistent, and then makes both when carrying out data interaction,
Do not result in the loss of data.
The embodiment of the present invention first sets threshold value and the second setting threshold value can obtain according to emulation, it is possible to
To obtain according to experiment, it is also possible to set according to the actual requirements.
The embodiment of the present invention is determining that the line number in the final blanking district of current composite video signal is carried out by needs
After adjustment, line number adjustment information, Qi Zhonghang can be determined according to the first normalized frequency and the second normalized frequency
Number adjustment information can be to include adjustment mode, and the implementation method of perfect square formula of the most really setting the tone is:
Mode one:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
Set threshold value with the first difference of described second normalized frequency not less than first, determine composite video signal
The mode that is adjusted of the line number in final blanking district for reducing operation.
The embodiment of the present invention is more than the second normalized frequency, and the first normalized frequency in the first normalized frequency
In the case of setting threshold value with the first difference of the second normalized frequency not less than first, composite video is utilized to believe
Number carry out the digital image processing unit in the system of image transmitting to process time of a two field picture and to be faster than multiple
Closing video encoder and encode the time of a two field picture, both normalized frequencies are inconsistent, and both are counting
According to time mutual, the loss of data can be caused, it is therefore desirable to the line number in the final blanking district of composite video signal is entered
Row sum-equal matrix, and the mode of adjustment is for reducing operation, so that the time that composite video encoder encodes a two field picture adds
Hurry up, and then make the normalized frequency of digital image processing unit and composite video encoder coding reach one
Causing, both do not result in the loss of data when carrying out data interaction.
Mode two:
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
Set threshold value with the second difference of described first normalized frequency not less than second, determine composite video signal
The mode that is adjusted of the line number in final blanking district for increasing operation.
The embodiment of the present invention is less than the second normalized frequency, and the second normalized frequency in the first normalized frequency
In the case of setting threshold value with the second difference of the first normalized frequency not less than second, composite video is utilized to believe
Number carry out the digital image processing unit in the system of image transmitting to process time of a two field picture and to be slower than multiple
Closing video encoder and encode the time of a two field picture, both normalized frequencies are inconsistent, and both are counting
According to time mutual, the loss of data can be caused, it is therefore desirable to the line number in the final blanking district of composite video signal is entered
Row sum-equal matrix, and the mode of adjustment is for increasing operation, so that the time that composite video encoder encodes a two field picture becomes
Slowly, so make digital image processing unit and composite video encoder coding normalized frequency reach one
Causing, both do not result in the loss of data when carrying out data interaction.
The present invention implements embodiment line number adjustment information in addition to can be to include adjustment mode, it is also possible to include adjusting
Full line number, the implementation method of full line number of the most really setting the tone is:
Mode one:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
With the first difference of described second normalized frequency not less than the first setting threshold value, according to the first difference range and
First the first corresponding relation adjusting line number, determines the first difference range belonging to described first difference, will really
Fixed described first difference range corresponding first adjustment line number as adjust line number.
Such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.Detect
Current the first normalized frequency of the digital image processing unit that arrives current more than composite video encoder the
Two normalized frequencies, and the first difference of the first normalized frequency and the second normalized frequency sets not less than first
Determine threshold value, adjust the first corresponding relation of line number according to the first difference range and first, determine the first difference institute
The first difference range belonged to, using the first corresponding for the first difference range of determining adjustment line number (3 row) as
Adjust line number.
The most such as: in 720P system, the line number in the final blanking district of composite video signal is 5 row, first
Setting threshold value as 0.1%, the first difference range and the first the first corresponding relation adjusting line number be: first is poor
Value scope be [0.1%, 0.2%) time, first adjust line number be 1 row；First difference range be [0.2%, 0.4%)
Time, the first adjustment line number is 2 row；First difference range be [0.4%, 0.6%) time, first adjust line number is
3 row.Detect the first current normalized frequency of the digital image processing unit obtained more than compound video code
The second normalized frequency that device is current, and the first difference of the first normalized frequency and the second normalized frequency is
0.25%, set threshold value (0.1%) not less than first, adjust the of line number according to the first difference range and first
One corresponding relation, determine the first difference range belonging to the first difference (0.25%) for [0.2%, 0.4%),
By determine the first difference range [0.2%, 0.4%) corresponding the first adjustment line number (2 row) is as adjusting row
Number.
Mode two:
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
With the second difference of described first normalized frequency not less than the second setting threshold value, according to the second difference range and
Second the second corresponding relation adjusting line number, determines the second difference range belonging to described second difference, will really
Fixed described second difference range corresponding second adjustment line number as adjust line number.
Such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.Detect
Current the first normalized frequency of the digital image processing unit that arrives current less than composite video encoder the
Two normalized frequencies, and the second difference of the second normalized frequency and the first normalized frequency sets not less than second
Determine threshold value, adjust the second corresponding relation of line number according to the second difference range and second, determine the second difference institute
The second difference range belonged to, using the second corresponding for the second difference range of determining adjustment line number (2 row) as
Adjust line number.
The most such as: in 720P system, the line number in the final blanking district of composite video signal is 5 row, second
Setting threshold value as 0.1%, the second difference range and the second the second corresponding relation adjusting line number be: second is poor
Value scope be [0.1%, 0.2%) time, second adjust line number be 1 row；Second difference range be [0.2%, 0.4%)
Time, the second adjustment line number is 2 row；Second difference range be [0.4%, 0.6%) time, second adjust line number is
3 row.Detect the first current normalized frequency of the digital image processing unit obtained less than compound video code
The second normalized frequency that device is current, and the second difference of the second normalized frequency and the first normalized frequency is
0.4%, set threshold value (0.1%) not less than second, adjust the of line number according to the second difference range and second
Two corresponding relations, determine the second difference range belonging to the second difference (0.4%) for [0.4%, 0.6%), will
The second difference range of determining [0.4%, 0.6%) corresponding the second adjustment line number (3 row) is as adjusting line number.
When the embodiment of the present invention line number in the final blanking district to composite video signal carries out reducing operation, if needing
Line number to be reduced exceedes the line number in final blanking district, can cause the line number in the final blanking district to composite video signal
The minimizing operation carried out is invalid, and following method can be used to process:
It is preferred that described, the first corresponding for described first difference range determined adjustment line number is gone as adjustment
After number, before the described line number adjustment information determined is sent to described composite video encoder, also include:
When described adjustment line number is more than the line number in the final blanking district of described composite video signal, according to described multiple
The line number in the final blanking district closing video signal adjusts described adjustment line number.
The embodiment of the present invention is when adjusting line number more than the line number in the final blanking district of composite video signal, according to multiple
The line number in the final blanking district closing video signal adjusts line number, can be accomplished by: can be by
The line number in the final blanking district of composite video signal is as adjusting line number.
Such as: in 720P system, the line number in the final blanking district of composite video signal is 3 row, now adjusts
Full line number is 4 row, then using 3 row as adjusting line number.
Described in the embodiment of the present invention using the first corresponding for described first difference range that determines adjustment line number as
After adjusting line number, before the described line number adjustment information determined is sent to described composite video encoder,
Also include:
When described adjustment line number is more than the 3rd setting threshold value, set threshold value using the described 3rd as adjusting row
Number, the wherein said 3rd sets described digital image processing unit and described compound video code according to threshold value
Composite video signal image delivering system residing for device determines.
As it is shown on figure 3, the method that the embodiment of the present invention three corrects composite video signal frequency deviation includes:
Step 200, composite video encoder receive line number adjustment information；
Current composite video signal is being carried out in cataloged procedure by step 201, described composite video encoder,
The line number in the final blanking district of described composite video signal is carried out by the described line number adjustment information according to receiving
Adjust.
Line number adjustment information described in the embodiment of the present invention comprises adjustment mode and/or adjusts line number.
The embodiment of the present invention adjusts mode and includes but not limited to following manner: increases operation, reduce operation etc..
The embodiment of the present invention is when adjustment information comprises adjustment mode and adjusts line number, and composite video encoder is pressed
According to adjustment mode, the line number in the final blanking district of composite video signal is adjusted, and the line number adjusted is for adjusting
The line number that line number is corresponding.
Such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.It is combined and regards
Frequently, after encoder receives line number adjustment information, wherein line number adjustment information includes adjustment mode (increasing operation)
With adjust line number (3 row), composite video encoder to the front blanking zone of current composite video signal, have
After effect district and final blanking district encode, select from the 5 row coded datas in the final blanking district encoded
3 row coded datas add in final blanking district.
The most such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.Compound
After video encoder receives line number adjustment information, wherein line number adjustment information includes that adjustment mode (reduces behaviour
Make) and adjust line number (3 row), composite video encoder is at the front blanking zone to current composite video signal
After encoding with effective district, only 2 row data before final blanking district are encoded, and 3 line numbers after deletion
According to, reach to reduce the line number in final blanking district the purpose of 3 row.
The embodiment of the present invention is when adjustment information only comprises adjustment mode, and composite video encoder is according to adjustment side
The line number in the final blanking district of composite video signal is adjusted by formula, and the line number wherein adjusted can be preset
Line number.
Such as: in 720P system, the line number in the final blanking district of composite video signal is 5 row.It is combined and regards
Frequently, after encoder receives line number adjustment information, wherein line number adjustment information includes that adjustment mode (increases behaviour
Make), the adjustment line number of systemic presupposition is 3 row；Composite video encoder is to current composite video signal
Front blanking zone, effective district and final blanking district encode after, 5 row from the final blanking district encoded are
Coded data select 3 row coded datas add in final blanking district.
The most such as: in 720P system, the line number in the final blanking district of composite video signal is 5 row.Compound
After video encoder receives line number adjustment information, wherein line number adjustment information includes that adjustment mode (reduces behaviour
Make), the adjustment line number of systemic presupposition is 2 row；Composite video encoder is to current composite video signal
Front blanking zone and after effective district encodes, only 3 row data before final blanking district are encoded, and delete
Except rear 3 row data, reach to reduce the line number in final blanking district the purpose of 2 row.
The embodiment of the present invention is when adjustment information only comprises adjustment line number, and composite video encoder can be according in advance
If adjustment mode (default adjustment mode can be increase operation or reduce operation) to composite video signal
The line number in final blanking district be adjusted, and the line number adjusted is to adjust the line number that line number is corresponding.
Such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.It is combined and regards
Frequently, after encoder receives line number adjustment information, wherein line number adjustment information includes that adjustment mode adjusts line number (3
OK), the adjustment mode of systemic presupposition is for increasing operation；Composite video encoder is to current composite video
After the front blanking zone of signal, effective district and final blanking district encode, from the 5 of the final blanking district encoded
Row coded data select 3 row coded datas add in final blanking district.
The most such as: in 720P system, the line number in the final blanking district of composite video signal is 5 row.Compound
After video encoder receives line number adjustment information, wherein line number adjustment information includes that adjustment mode adjusts line number
(3 row), the adjustment mode of systemic presupposition is for reducing operation；Composite video encoder compound is regarding current
Frequently after the front blanking zone of signal, effective district and final blanking district encode, only to 2 line numbers before final blanking district
According to encoding, and 3 row data after deletion, reach to reduce the line number in final blanking district the purpose of 3 row.
As shown in Figure 4, the embodiment of the present invention four is corrected the method for composite video signal frequency deviation and is included:
Step 300, according to current the first normalized frequency of digital image processing unit and compound video code
The second normalized frequency that device is current, it may be judged whether need the final blanking district to current composite video signal
Line number is adjusted, if then performing step 301；If it is not, then perform step 306.
In step 300, if the first normalized frequency is more than the second normalized frequency, and the first normalization frequency
Rate is not less than the first setting threshold value with the first difference of the second normalized frequency, it is determined that need to adjust；If or
First normalized frequency is less than the second normalized frequency, and the second normalized frequency and the first normalized frequency
Second difference is not less than the second setting threshold value, it is determined that need to adjust.
Step 301, according to the first normalized frequency, the second normalized frequency, first set threshold value or second
Set threshold value, determine adjustment mode.
In step 301, if the first normalized frequency is more than the second normalized frequency, and the first normalization frequency
Rate sets threshold value with the first difference of the second normalized frequency not less than first, determines that adjustment mode is for reducing behaviour
Make；If or the first normalized frequency is less than the second normalized frequency, and the second normalized frequency and the first normalizing
The second difference changing frequency sets threshold value not less than second, determines that adjustment mode is for increasing operation.
Step 302, according to the first normalized frequency, the second normalized frequency, the first difference range and first
First corresponding relation of adjustment line number or the second difference range and second adjust the second corresponding relation of line number, really
Set the tone full line number.
In step 302, if the first normalized frequency is more than the second normalized frequency, and the first normalization frequency
First difference of rate and the second normalized frequency is not less than the first setting threshold value, according to the first difference range and the
One the first corresponding relation adjusting line number, determines the first difference range belonging to the first difference, the will determined
First adjustment line number corresponding to one difference range is as adjusting line number (when adjusting line number more than composite video signal
The line number in final blanking district time, adjust line number according to the line number in the final blanking district of composite video signal)；
If or the first normalized frequency is less than the second normalized frequency, and the second normalized frequency and the first normalization frequency
Second difference of rate, not less than the second setting threshold value, adjusts the second of line number according to the second difference range and second
Corresponding relation, determines the second difference range belonging to the second difference, by corresponding for the second difference range determined
Second adjusts line number as adjusting line number.
Step 303, using adjustment mode and adjust line number be sent to compound video code as line number adjustment information
Device.
Step 304, composite video encoder receive line number adjustment information.
Current composite video signal is being carried out in cataloged procedure by step 305, composite video encoder, root
According to the line number adjustment information received, the line number in the final blanking district of composite video signal is adjusted.
Current composite video signal is encoded by step 306, composite video encoder.
Such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.Detect
Current the first normalized frequency of the digital image processing unit that arrives current more than composite video encoder the
Two normalized frequencies, and the first difference of the first normalized frequency and the second normalized frequency sets not less than first
Determine threshold value, determine and need the line number in the final blanking district of current composite video signal is adjusted, and adjust
Mode is for reducing operation；Adjust the first corresponding relation of line number according to the first difference range and first, determine the
The first difference range belonging to one difference, adjusts line number (3 by corresponding for the first difference range determined first
OK) as adjusting line number；Minimizing operation and adjustment line number (3 row) are sent to as line number adjustment information
Composite video encoder.
The most such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.Detection
Current the first normalized frequency of the digital image processing unit that obtains is current less than composite video encoder
Second normalized frequency, and the second difference of the second normalized frequency and the first normalized frequency is not less than second
Set threshold value, determine and need the line number in the final blanking district of current composite video signal is adjusted, and adjust
Perfect square formula is for increasing operation；Adjust the second corresponding relation of line number according to the second difference range and second, determine
The second difference range belonging to second difference, adjusts line number (2 by corresponding for the second difference range determined second
OK) as adjusting line number；Increase operation and adjustment line number (2 row) are sent to as line number adjustment information
Composite video encoder.
The most such as: in 720P system, the line number in the final blanking district of composite video signal is 3 row.Detection
Current the first normalized frequency of the digital image processing unit that obtains is current more than composite video encoder
Second normalized frequency, and the first difference of the first normalized frequency and the second normalized frequency is not less than first
Set threshold value, determine and need the line number in the final blanking district of current composite video signal is adjusted, and adjust
Perfect square formula is for reducing operation；Adjust the first corresponding relation of line number according to the first difference range and first, determine
The first difference range belonging to first difference, adjusts line number (4 by corresponding for the first difference range determined first
OK) as adjusting line number, now, the line number (4 row) the final blanking district more than composite video signal is adjusted
Line number (3 row), using the line number in the final blanking district of composite video signal as adjusting line number；By minimizing operation and
Adjust line number (3 row) and be sent to composite video encoder as line number adjustment information.
The most such as: in 720P system, the line number in the final blanking district of composite video signal is 5 row.Detection
Current the first normalized frequency of the digital image processing unit that obtains is current more than composite video encoder
Second normalized frequency, the first normalized frequency sets less than first with the first difference of the second normalized frequency
Threshold value, determines that the line number that need not the final blanking district to current composite video signal is adjusted.
The most such as: in 720P system, the line number in the final blanking district of composite video signal is 5 row.Detection
Current the first normalized frequency of the digital image processing unit that obtains is current less than composite video encoder
Second normalized frequency, the second normalized frequency sets less than second with the second difference of the first normalized frequency
Threshold value, determines that the line number that need not the final blanking district to current composite video signal is adjusted.
The most such as: in 1080P system, the line number in the final blanking district of composite video signal is 5 row.Detection
Current the first normalized frequency of the digital image processing unit that obtains is current equal to composite video encoder
Second normalized frequency, determines that the line number that need not the final blanking district to current composite video signal is adjusted
Whole.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of correction composite video signal frequency deviation
Equipment and a kind of composite video encoder correcting composite video signal frequency deviation, due to Fig. 5 correction be combined
The method that the equipment of video signal frequency deviation is corresponding is that embodiment of the present invention one corrects composite video signal frequency deviation
Method, owing to method that the composite video encoder of the correction composite video signal frequency deviation of Fig. 6 is corresponding is this
A kind of method correcting composite video signal frequency deviation of inventive embodiments, therefore embodiment of the present invention equipment is with compound
The enforcement of video encoder may refer to the enforcement of system, repeats no more in place of repetition.
The embodiment of the present invention corrects the equipment of composite video signal frequency deviation can be in Digital Image Processing list
A module in unit, it is also possible to the module being in composite video encoder, it is also possible to be between
A new equipment between digital image processing unit and composite video encoder.
As it is shown in figure 5, the equipment that the embodiment of the present invention five corrects composite video signal frequency deviation includes:
Judge module 400, for first normalized frequency current according to digital image processing unit with compound
The second normalized frequency that video encoder is current, it may be judged whether after needing current composite video signal
The line number of blanking zone is adjusted；
Determine module 401, for determining the line number needing the final blanking district to current composite video signal
After being adjusted, determine that line number adjusts letter according to described first normalized frequency and described second normalized frequency
Breath；
Sending module 402, for being sent to described compound video code by the described line number adjustment information determined
Device, so that described composite video signal is being carried out in cataloged procedure, according to connecing by described composite video encoder
The line number in the final blanking district of described composite video signal is adjusted by the described line number adjustment information received.
It is preferred that described judge module 400 specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
It is not less than the first setting threshold value, it is determined that need described multiple with the first difference of described second normalized frequency
The line number in the final blanking district closing video signal is adjusted；If or described first normalized frequency is less than described the
Two normalized frequencies, and described second normalized frequency is the least with the second difference of described first normalized frequency
Threshold value is set, it is determined that need the line number in the final blanking district of described composite video signal is adjusted in second
Whole.
It is preferred that described line number adjustment information includes adjustment mode；
Described determine module 401 specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
Set threshold value with the first difference of described second normalized frequency not less than first, determine composite video signal
The mode that is adjusted of the line number in final blanking district for reducing operation；If or described first normalized frequency is less than
Described second normalized frequency, and described second normalized frequency is poor with the second of described first normalized frequency
Value, not less than the second setting threshold value, determines the side that the line number in the final blanking district to composite video signal is adjusted
Formula is for increasing operation.
It is preferred that described line number adjustment information includes adjusting line number；
Described determine module 401 specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
With the first difference of described second normalized frequency not less than the first setting threshold value, according to the first difference range and
First the first corresponding relation adjusting line number, determines the first difference range belonging to described first difference, will really
Fixed described first difference range corresponding first adjustment line number as adjust line number；If or described first normalizing
Change frequency and be less than described second normalized frequency, and described second normalized frequency is with described first normalization frequently
Second difference of rate, not less than the second setting threshold value, adjusts the second of line number according to the second difference range and second
Corresponding relation, determines the second difference range belonging to described second difference, the described second difference model that will determine
Enclose the second adjustment line number of correspondence as adjusting line number.
Determine that module 401 is additionally operable to it is preferred that described:
When described adjustment line number is more than the line number in the final blanking district of described composite video signal, according to described multiple
The line number in the final blanking district closing video signal adjusts described adjustment line number.
As shown in Figure 6, the embodiment of the present invention six corrects the composite video encoder bag of composite video signal frequency deviation
Include:
Receiver module 500, is used for receiving line number adjustment information；
Adjusting module 501, for carrying out in cataloged procedure to current composite video signal, according to reception
To described line number adjustment information the line number in the final blanking district of described composite video signal is adjusted.
It is preferred that described line number adjustment information comprises adjustment mode and/or adjusts line number.
In sum, owing to the embodiment of the present invention is in the current normalized frequency of digital image processing unit and multiple
Closing video encoder current normalized frequency when there is frequency deviation, composite video encoder is to current compound
During encoding video signal, the line number in the final blanking district of this composite video signal can be adjusted,
So that the normalized frequency of the normalized frequency of digital image processing unit and composite video encoder reaches one
Cause, and then make both during carrying out data interaction, do not result in the loss of data.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can use complete hardware embodiment, complete software implementation or knot
The form of the embodiment in terms of conjunction software and hardware.And, the present invention can use and wherein wrap one or more
Computer-usable storage medium containing computer usable program code (include but not limited to disk memory,
CD-ROM, optical memory etc.) form of the upper computer program implemented.
The present invention is with reference to method, equipment (system) and computer program product according to embodiments of the present invention
The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding
The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating
The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one
The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set
In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory
Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart
The function specified in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices
Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one
The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (14)
1. the method correcting composite video signal frequency deviation, it is characterised in that the method includes:
First normalized frequency current according to digital image processing unit and composite video encoder are current
Second normalized frequency, it may be judged whether need the line number in the final blanking district of current composite video signal is carried out
Adjust；
After determining that the line number in the final blanking district of current composite video signal is adjusted by needs, according to institute
State the first normalized frequency and described second normalized frequency determines line number adjustment information；
The described line number adjustment information determined is sent to described composite video encoder, so that described being combined regards
Frequently described composite video signal is being carried out in cataloged procedure by encoder, adjusts according to the described line number received
The line number in the final blanking district of described composite video signal is adjusted by information.
2. the method for claim 1, it is characterised in that described in judge whether need to current
The line number in the final blanking district of composite video signal is adjusted, including:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
It is not less than the first setting threshold value, it is determined that need described multiple with the first difference of described second normalized frequency
The line number in the final blanking district closing video signal is adjusted；Or
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
It is not less than the second setting threshold value, it is determined that need described multiple with the second difference of described first normalized frequency
The line number in the final blanking district closing video signal is adjusted.
3. method as claimed in claim 2, it is characterised in that described line number adjustment information includes adjusting
Mode；
Described according to described first normalized frequency with described second normalized frequency, determine that line number adjusts letter
Breath, including:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
Set threshold value with the first difference of described second normalized frequency not less than first, determine composite video signal
The mode that is adjusted of the line number in final blanking district for reducing operation；Or
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
Set threshold value with the second difference of described first normalized frequency not less than second, determine composite video signal
The mode that is adjusted of the line number in final blanking district for increasing operation.
4. method as claimed in claim 2 or claim 3, it is characterised in that described line number adjustment information includes
Adjust line number；
Described determine line number adjustment information according to described first normalized frequency and described second normalized frequency,
Including:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
With the first difference of described second normalized frequency not less than the first setting threshold value, according to the first difference range and
First the first corresponding relation adjusting line number, determines the first difference range belonging to described first difference, will really
Fixed described first difference range corresponding first adjustment line number as adjust line number；Or
If described first normalized frequency is less than described second normalized frequency, and described second normalized frequency
With the second difference of described first normalized frequency not less than the second setting threshold value, according to the second difference range and
Second the second corresponding relation adjusting line number, determines the second difference range belonging to described second difference, will really
Fixed described second difference range corresponding second adjustment line number as adjust line number.
5. method as claimed in claim 4, it is characterised in that described described first difference that will determine
First adjustment line number corresponding to scope is as adjusting after line number, and the described line number adjustment information that will determine sends
Before described composite video encoder, also include:
When described adjustment line number is more than the line number in the final blanking district of described composite video signal, according to described multiple
The line number in the final blanking district closing video signal adjusts described adjustment line number.
6. the method correcting composite video signal frequency deviation, it is characterised in that the method includes:
Composite video encoder receives line number adjustment information；
Current composite video signal is being carried out in cataloged procedure, according to reception by described composite video encoder
To described line number adjustment information the line number in the final blanking district of described composite video signal is adjusted.
7. method as claimed in claim 6, it is characterised in that described line number adjustment information comprises adjustment
Mode and/or adjustment line number.
8. the equipment correcting composite video signal frequency deviation, it is characterised in that this equipment includes:
Judge module, for first normalized frequency current according to digital image processing unit and composite video
The second normalized frequency that encoder is current, it may be judged whether need the final blanking to current composite video signal
The line number in district is adjusted；
Determine module, for determining that the line number in the final blanking district of current composite video signal is carried out by needs
After adjustment, determine line number adjustment information according to described first normalized frequency and described second normalized frequency；
Sending module, for the described line number adjustment information determined is sent to described composite video encoder,
So that described composite video signal is being carried out in cataloged procedure, according to receiving by described composite video encoder
Described line number adjustment information the line number in the final blanking district of described composite video signal is adjusted.
9. equipment as claimed in claim 8, it is characterised in that described judge module specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
It is not less than the first setting threshold value, it is determined that need described multiple with the first difference of described second normalized frequency
The line number in the final blanking district closing video signal is adjusted；If or described first normalized frequency is less than described the
Two normalized frequencies, and described second normalized frequency is the least with the second difference of described first normalized frequency
Threshold value is set, it is determined that need the line number in the final blanking district of described composite video signal is adjusted in second
Whole.
10. equipment as claimed in claim 9, it is characterised in that described line number adjustment information includes adjusting
Mode；
Described determine module specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
Set threshold value with the first difference of described second normalized frequency not less than first, determine composite video signal
The mode that is adjusted of the line number in final blanking district for reducing operation；If or described first normalized frequency is less than
Described second normalized frequency, and described second normalized frequency is poor with the second of described first normalized frequency
Value, not less than the second setting threshold value, determines the side that the line number in the final blanking district to composite video signal is adjusted
Formula is for increasing operation.
11. equipment as described in claim 9 or 10, it is characterised in that described line number adjustment information bag
Include adjustment line number；
Described determine module specifically for:
If described first normalized frequency is more than described second normalized frequency, and described first normalized frequency
With the first difference of described second normalized frequency not less than the first setting threshold value, according to the first difference range and
First the first corresponding relation adjusting line number, determines the first difference range belonging to described first difference, will really
Fixed described first difference range corresponding first adjustment line number as adjust line number；If or described first normalizing
Change frequency and be less than described second normalized frequency, and described second normalized frequency is with described first normalization frequently
Second difference of rate, not less than the second setting threshold value, adjusts the second of line number according to the second difference range and second
Corresponding relation, determines the second difference range belonging to described second difference, the described second difference model that will determine
Enclose the second adjustment line number of correspondence as adjusting line number.
12. equipment as claimed in claim 11, it is characterised in that described determine that module is additionally operable to:
When described adjustment line number is more than the line number in the final blanking district of described composite video signal, according to described multiple
The line number in the final blanking district closing video signal adjusts described adjustment line number.
13. 1 kinds of composite video encoders correcting composite video signal frequency deviation, it is characterised in that this is combined
Video encoder includes:
Receiver module, is used for receiving line number adjustment information；
Adjusting module, for carrying out in cataloged procedure to current composite video signal, according to receive
The line number in the final blanking district of described composite video signal is adjusted by described line number adjustment information.
14. composite video encoders as claimed in claim 13, it is characterised in that described line number adjusts
Information comprises adjustment mode and/or adjusts line number.
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| CN104301582A (en) * | 2013-11-29 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Composite video signal generating method |
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| US20050280710A1 (en) * | 2004-06-21 | 2005-12-22 | Samsung Electronics Co., Ltd. | Method and apparatus for correcting frequency characteristics of carrier chrominance signal |
| CN101690217A (en) * | 2007-05-02 | 2010-03-31 | 麦克罗维西恩公司 | Method and apparatus for providing content control via detection of modifications to a signal |
| CN102740085A (en) * | 2012-06-26 | 2012-10-17 | 上海屹芯微电子有限公司 | Composite video broadcast signal decoding device and method with time division multiplexing |
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