CN102740086A - Automatic identification method and device of composite video broadcast signal system - Google Patents
Automatic identification method and device of composite video broadcast signal system Download PDFInfo
- Publication number
- CN102740086A CN102740086A CN2012102145538A CN201210214553A CN102740086A CN 102740086 A CN102740086 A CN 102740086A CN 2012102145538 A CN2012102145538 A CN 2012102145538A CN 201210214553 A CN201210214553 A CN 201210214553A CN 102740086 A CN102740086 A CN 102740086A
- Authority
- CN
- China
- Prior art keywords
- standard
- line
- current
- frequency
- testing result
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000012360 testing method Methods 0.000 claims description 60
- 230000011664 signaling Effects 0.000 claims description 21
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 230000000052 comparative effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 108010001267 Protein Subunits Proteins 0.000 description 2
- 238000012952 Resampling Methods 0.000 description 2
- 101000959126 Xenopus laevis Peptidyl-alpha-hydroxyglycine alpha-amidating lyase B Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The invention relates to the fields of video coding and decoding and discloses an automatic identification method and device of a composite video broadcast signal system. According to the automatic identification method and device of the composite video broadcast signal system, a system which is not detected is selected as the system of a CVBS (composite video broadcast signal) input currently from all possible systems; the CVBS input currently is decoded according to the parameter of the system selected currently so as to obtain a detection result used for judging the elements of the system; the condition whether the detection result of all the elements conforms to the system selected currently or not is judged; if the detection result of all the elements conforms to the system selected currently, the condition that the system selected currently is the actual system of the CVBS is judged; and if the detection result of all the elements does not conform to the system selected currently, various systems are tried one by one until a system conforming to the detection result of all the elements is found as the actual system of the CVBS. By adopting a method for trying various systems one by one for proving after supposing firstly according to the automatic identification method and device of the composite video broadcast signal system, the inherent hardware resource of a decoding circuit is fully utilized, the system of a composite video broadcast signal is quickly, effectively and automatically identified, and the cost of a decoder is greatly lowered.
Description
Technical field
The present invention relates to the coding and decoding video field, particularly a kind of automatic identifying method and device of composite video broadcast singal standard.
Background technology
The standard of composite video broadcast singal mainly is divided into three kinds: NTSC, PAL and SECAM, these three kinds of standards can not be compatible.NTSC (abbreviation of National Television System Committee) standard is also claimed quadrature amplitude balance system owing to be that the U.S. at first develops and uses, so also claim US-built, Japan, states such as Canada also use this standard.TSC-system is that first successfully formally is applied to a kind of compatible color tv standard of television broadcasting in the world; It selects a luminance signal and two color difference signals for use; Utilize quadrature amplitude balance to be modulated to color difference signal on the color sub-carrier; Adopted the technology of putting between frequency spectrum, be inserted in two color difference signals in the luminance signal space and transmit simultaneously.Frame per second is per second 29.97 frames, and scan line is 525, interlacing scan, and aspect ratio is 4:3, resolution is 720x480.The major defect of TSC-system is colored poor stability, and is promptly responsive to phase distortion.However, TSC-system is immeasurable to the contribution of color TV development, and it has established very important basis for the development of other standards afterwards.
PAL (Phase Alternation Line) system is also claimed line-by-line inversion quadrature amplitude balance system, is called for short phase-aoternation line system, by former federal republic of germany development and at first use, claims West Germany's system again, Britain, and Australia and China all use this standard.But monochrome scale is different, and West Germany is the PAL-B/G system, and China is the PAL-D system.Phase Alternation Line system is a kind of improvement to TSC-system, and it is basic identical to Signal Processing mode and TSC-system, just a modulated colouring component in two color difference signals is carried out the shortcoming that line-by-line inversion overcomes TSC-system phase distortion sensitiveness.Frame per second per second 25 frames, scan line 625 row, interlacing scan,
Aspect ratio 4:3, resolution 720x576.
Sequential Color and Memory system (Sequential Colour and Memory) are claimed again to rotate line by line, storage, frequency modulation pass look system; Be called for short frequency modulation system; It overcomes the variable shortcoming of NTSC colour TV system from another approach; France at first succeeds in developing, so claim France's system again, some countries of the former Soviet Union and Eastern Europe have all used this standard.In Sequential Color and Memory system, two color difference signals carry out frequency modulation to two subcarrier frequencies and transmit in turn line by line, and promptly each row only transmits a color difference components, has therefore overcome crosstalking each other between signal.When receiving terminal recovered tristimulus signals, the color difference signal storing one row time need transmitting every row used as one of color difference signal of next line, and promptly each color difference signal need use twice.Because each row only transmits a color difference signal, subcarrier was all only modulated by a color difference signal in any one time, so need as TSC-system, not carry out quadrature amplitude balance.Frame per second per second 25 frames, scan line 625 row, interlacing scan, aspect ratio 4:3, resolution 720x576.
The detailed contrast of three kinds of standards is as shown in table 1:
| Standard | Line number | Number of fields | Subcarrier frequency | Applicable cases |
| NTSC-M | 525 | 60 | 3.579545MHz | The U.S., Japan |
| PAL-B,G，N | 625 | 50 | 4.433619MHz | Germany |
| PAL-D | 625 | 50 | 4.433619MHz | China |
| PAL-H | 625 | 50 | 4.433619MHz | Belgium |
| PAL-I | 625 | 50 | 4.433619MHz | Britain |
| PAL-M | 525 | 60 | 3.575612MHz | Brazil |
| PAL-CN | 625 | 50 | 3.582056MHz | Argentina |
| SECAM | 625 | 50 | 4.406MHz4.250MHz | France, Russia |
| PAL-60 | 525 | 60 | 4.433619MHz | China |
| NTSC(4.43) | 525 | 60 | 4.433619MHz | Video tape recorder |
Because the CVBS signaling mode is various, therefore, the circuit of identification signal standard seems extremely important in the CVBS decoding device automatically.At present, the flow process of the method for common automatic identification composite video broadcast singal standard is as shown in Figure 1, and concrete steps are following:
Step 101 detects field frequency and line frequency, if field frequency is 50Hz, then execution in step 102; If field frequency is 60Hz, then execution in step 104;
Whether step 103 detects subcarrier frequency FSC greater than 4.2MHz, if, then judge current standard be PAL (B, D, G, H, I); Otherwise, judge that current standard is PAL (CN);
Whether step 104 detects subcarrier frequency FSC greater than 4.2MHz, if, execution in step 105; Otherwise, execution in step 106;
Step 105 detects whether line-by-line inversion of chrominance carrier, if judge that then current standard is PAL (60); Otherwise, judge that current standard is NTSC (4.43);
This technical scheme can identify the standard of signal flexibly; But the algorithm complex of its realization is bigger; And need special module to realize discerning automatically the function of standard, the complexity and the extra hardware expense of having brought for the decoding device of composite video broadcast singal.
Summary of the invention
The object of the present invention is to provide a kind of automatic identifying method and device of composite video broadcast singal standard; Make the present invention adopt and suppose afterwards to solve earlier the method that various standards are attempted one by one; Make full use of the intrinsic hardware resource of decoding circuit; Automatically discern the standard of composite video broadcast singal fast and effectively, greatly reduce the cost of decoder.
For solving the problems of the technologies described above, execution mode of the present invention provides a kind of automatic identifying method of composite video broadcast singal standard, comprises following steps:
Step 1 is selected a kind of standard that does not detect from all possible standard, as the standard of the CVBS signal of current input;
Step 2 according to the parameter of current selected standard, is decoded to the CVBS signal of current input, obtains being used to judging the testing result of the key element of standard;
Step 3 judges whether all saidly to be used to judge that the testing result of the key element of standard conforms to said current selected standard that if not, then execution in step four; If then execution in step six;
Step 4 is judged the actual standard of the CVBS signal that said current selected standard is not said current input, returns execution in step one;
Step 5 is judged the actual standard of the CVBS signal that said current selected standard is said current input.
Execution mode of the present invention also provides a kind of automatic identification equipment of composite video broadcast singal standard, comprises: standard is selected module, parameter configuration module, CVBS decoder module, judge module;
Said standard selects module to be used for selecting a kind of standard that does not detect from all possible standard, as the standard of the CVBS signal of current input;
Said parameter configuration module is used for selecting according to said standard the parameter of the current selected standard of module, disposes said CVBS decoder module;
Said CVBS decoder module is used for the CVBS signal of current input is decoded, and obtains being used to judging the testing result of the key element of standard, and exports to said judge module;
Said judge module is used for according to the testing result of key element that is used to judge standard from said decoder module; Judge whether all saidly to be used to judge that the testing result of the key element of standard conforms to the current standard that said standard selects module to select; When said testing result all conforms to, judge the actual standard of the CVBS signal that said current selected standard is said current input; When having any one not conform in the said testing result, judge the actual standard of the CVBS signal that said current selected standard is not said current input, trigger the said standard of stating again and select module.
Embodiment of the present invention is selected a kind of standard that does not detect in terms of existing technologies from all possible standard, as the standard of the CVBS signal of current input; According to the parameter of current selected standard, configuration CVBS decoder module, and the control decoder module decodes to the CVBS signal of current input obtains being used to judging the testing result of the key element of standard; Judge whether that all being used to judge that the testing result of the key element of standard conforms to current selected standard,, then judge the actual standard of the CVBS signal that current selected standard is current input if conform to; If do not conform to; Then attempt various standards one by one; Until the actual standard that finds a kind of standard that is consistent as the CVBS signal of current input, embodiment of the present invention adopts to be supposed afterwards to solve the method that various standards are attempted one by one earlier, makes full use of the intrinsic hardware resource of decoding circuit; Automatically discern the standard of composite video broadcast singal fast and effectively, greatly reduce the cost of decoder.
In addition; Said all possible standard is the phase-aoternation line system PAL (B that Germany uses; G, N), the phase-aoternation line system PAL (M) that uses of phase-aoternation line system PAL (D) that China uses, phase-aoternation line system PAL (I) that Britain uses, phase-aoternation line system PAL (H), the U.S. and Japan that Belgium uses quadrature amplitude balance system NTSC (M), frequency modulation system SECAM, Brazil of using, the phase-aoternation line system PAL (60) that China uses, the phase-aoternation line system PAL (CN) of Argentina's use, the quadrature amplitude balance system NTSC (4.43) of video tape recorder.Attempt all possible standard one by one, up to finding actual standard,
In addition, saidly be used to judge that the key element of standard comprises: line frequency and field frequencies range, chrominance subcarrier frequency, burst signal line-by-line inversion.Can the possible standard in district office through above-mentioned three key elements, have only three key elements all to meet, could judge that current selected standard is actual standard, three key elements can uniquely be confirmed possible standard.
In addition; When whether the said line frequency that obtains in judgement and the testing result of field frequencies range conform to field frequencies range with the line frequency of said current selected standard; Under the control of local clock, the time interval between the line synchronizing signal is counted; If count results is consistent with the standard value of the line synchronizing signal spacing of current selected standard, explain that the line frequency of the CVBS signal of current input conforms to field frequencies range with the line frequency of current selected standard with field frequencies range; Otherwise, explain that the line frequency of the CVBS signal of current input does not conform to field frequencies range with the line frequency of current selected standard with field frequencies range.
When whether the testing result of the said chrominance subcarrier frequency that obtains in judgement conforms to the chrominance subcarrier frequency of said current selected standard; Chrominance subcarrier frequency according to said current selected standard; Attempt locking chrominance carrier phase-locked loop; If can not lock, explain that then the chrominance subcarrier frequency of the CVBS signal of current input does not conform to the chrominance subcarrier frequency of said current selected standard; If can lock, explain that then the chrominance subcarrier frequency of the CVBS signal of current input conforms to the chrominance subcarrier frequency of said current selected standard.
When whether the testing result of the said burst signal line-by-line inversion that obtains in judgement conforms to the burst signal line-by-line inversion of said current selected standard; Parameter according to current selected standard; Detect the line-by-line inversion situation of burst signal; If detect the signaling mode that the line-by-line inversion that obtains meets current hypothesis, explain that then the burst signal line-by-line inversion of the CVBS signal of current input does not conform to current selected standard; Otherwise, explain that the burst signal line-by-line inversion of the CVBS signal of current input does not conform to current selected standard.
Parameter according to current selected standard; The standard value of the result who the time interval between the line synchronizing signal is counted through synchronous submodule and the line synchronizing signal spacing of current selected standard compares; The chrominance carrier phase-locked loop of light tone segregant module is attempted locking; Burst signal line-by-line inversion detection sub-unit is carried out line-by-line inversion to burst signal and is detected, and can easily realize being used to judging the differentiation of the three elements of standard, except the simple identification control module automatically that increases; Need not the additional hardware expense, make full use of the intrinsic hardware resource of decoding circuit.
Description of drawings
Fig. 1 is the flow chart of automatic identifying method of the composite video broadcast singal standard of prior art;
Fig. 2 is the flow chart according to the automatic identifying method of the composite video broadcast singal standard of first embodiment of the invention;
Fig. 3 is the structure chart according to the automatic identification equipment of the composite video broadcast singal standard of second embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that each execution mode of the present invention is carried out detailed elaboration below.Yet, persons of ordinary skill in the art may appreciate that in each execution mode of the present invention, in order to make the reader understand the application better many ins and outs have been proposed.But,, also can realize each claim of the application technical scheme required for protection even without these ins and outs with based on the many variations and the modification of following each execution mode.
First execution mode of the present invention relates to a kind of automatic identifying method of composite video broadcast singal standard, and flow process is as shown in Figure 2, and concrete steps are following:
In addition, it will be understood by those skilled in the art that and to sort according to the possibility of input CVBS signaling mode, most possible standard is come the foremost attempt, can improve the standard identification efficiency.
Specifically, be used to judge that the key element of standard comprises: line frequency and field frequencies range, chrominance subcarrier frequency, burst signal line-by-line inversion specify judgment criterion below:
The step of top the whole bag of tricks is divided, and is just clear in order to describe, and can merge into a step during realization and perhaps some step split, and is decomposed into a plurality of steps, as long as comprise identical logical relation, all in the protection range of this patent; To adding inessential modification in the algorithm or in the flow process or introduce inessential design, but the core design that does not change its algorithm and flow process is all in the protection range of this patent.
Second embodiment of the invention relates to a kind of automatic identification equipment of composite video broadcast singal standard, and is as shown in Figure 3, comprises: automatic identification control module, CVBS decoder module;
The CVBS decoder module disposes the CVBS decoder module according to the parameter of the automatic current selected standard of identification control module; CVBS signal to current input is decoded, and obtains being used to judging the testing result of the key element of standard, and exports to automatic identification control module.Wherein, the parameter of standard comprises: the frequency of standard, line frequency, field frequencies range, chrominance carrier; Be used to judge that the key element of standard comprises: line frequency and field frequencies range, chrominance subcarrier frequency, burst signal line-by-line inversion.
Specifically, this CVBS decoder module comprises automatic gain controller 301, analog-digital converter 302, resampling processor 303, digital clamper 304, light tone segregant module 305, synchronous submodule 306;
Automatic gain controller 301 is adjusted the gain of signal automatically according to the statistics to the current demand signal amplitude, makes the best dynamic range that satisfies analog-digital converter 302 of amplitude of signal; Analog-digital converter 302 receives the local clock signal, and the time-multiplexed simulation CVBS signal that is received is carried out the digitlization CVBS signal that analog-to-digital conversion obtains sampling;
Resampling processor 303, the digitlization CVBS signal of right sampling estimates the sampling deviation of transmitting terminal crystal and local crystal, and corrects, and obtains correcting the digitlization CVBS signal of sampling frequency offset;
Light tone segregant module 305 is done the light tone separating treatment to the digitlization CVBS signal that direct current recovers, and obtains brightness signal Y and two color difference signal Cb/Cr, accomplishes the decoding of composite video broadcast singal; Light tone segregant module comprises the chrominance carrier phase-locked loop, and the frequency that whether current demand signal is contained chrominance carrier and subcarrier is exported to automatic identification control module 307; Whether light tone segregant module also comprises the line-by-line inversion detection sub-unit, exist line-by-line inversion to export to automatic identification control module 307 current demand signal.
The flow process of the automatic whole automatic detection of identification control module controls.In system initialisation phase; According to the method step of automatic identification CVBS signaling mode; Control whole C VBS signal decoding apparatus; And, judge whether current standard is correct through the field frequency of the synchronous submodule 306 of detection and the subcarrier frequency and the line-by-line inversion situation of light tone segregant module 305, attempt various standards successively and accomplish identification automatically.Specifically comprise: standard is selected module, parameter configuration module, judge module;
Standard selects module from all possible standard, to select a kind of not standard of detection, as the standard of the CVBS signal of current input;
Parameter configuration module disposes the CVBS decoder module according to the parameter of current selected standard;
Judge module receives the testing result of key element that is used to judge standard from decoder module; Judge whether that all being used to judge that the testing result of the key element of standard conforms to current selected standard; If then judge the actual standard of the CVBS signal that current selected standard is current input; If not, then judge the actual standard of the CVBS signal that current selected standard is not current input, and this result of determination is fed back to standard selection module.Below specify the concrete deterministic process of judge module:
Submodule carries out synchronous detecting to the CVBS signal of current input synchronously, and the testing result that obtains is exported to judge module; Specifically, submodule goes down the time interval between the count line synchronizing signal in the control of local clock synchronously, and count results is exported to judge module;
Light tone segregant module further comprises chrominance carrier phase-locked loop, line-by-line inversion detection sub-unit;
The chrominance carrier phase-locked loop locks the chrominance carrier of the CVBS signal of current input, and the testing result that obtains is exported to judge module; Specifically, can the chrominance carrier phase-locked loop be attempted locking chrominance carrier phase-locked loop according to the chrominance subcarrier frequency of current selected standard, lock the chrominance carrier phase-locked loop and export to judge module as testing result;
The line-by-line inversion detection sub-unit is according to the indication of current selected standard, detects the situation of burst signal line-by-line inversion, and whether the line-by-line inversion that detection is obtained meets the signaling mode of current hypothesis is exported to judge module as testing result;
Whether the line frequency that the testing result judgement of synchronous submodule of judge module basis and the output of light tone segregant module obtains and field frequencies range, chrominance subcarrier frequency and burst signal line-by-line inversion and standard select the current standard of module selection to conform to; When testing result all conforms to, judge the actual standard of the CVBS signal that current selected standard is current input; When having any one not conform in the testing result, judge the actual standard of the CVBS signal that current selected standard is not current input.
Specifically; Judge module judges according to the testing result of submodule output synchronously whether the line frequency that obtains conforms to field frequencies range with the line frequency of current selected standard with field frequencies range; That is to say; Judge module compares the standard value of the line synchronizing signal spacing of count results and selected standard
When comparative result when being inconsistent, line frequency and the line frequency and the field frequencies range of the standard that field frequencies range does not meet current selection of the CVBS signal of current input is described, then judge the actual standard of the CVBS signal that current selected standard is not current input; When comparative result is unanimity; Line frequency and the line frequency and the field frequencies range of the standard that field frequencies range meets current selection of the CVBS signal of current input are described; Then judge module further judges according to the testing result of chrominance carrier phase-locked loop output whether the chrominance subcarrier frequency that obtains conforms to the chrominance subcarrier frequency of current selected standard; Be that testing result is to lock or can not lock
When testing result for can not lock the time, explain that the chrominance subcarrier frequency of the CVBS signal of current input does not meet the chrominance subcarrier frequency of the standard of current selection, then judge the actual standard of the CVBS signal that current selected standard is not current input; When testing result for can lock the time; Explain that the chrominance subcarrier frequency of the CVBS signal of current input meets the chrominance subcarrier frequency of the standard of current selection; Then judge module judges according to the testing result of line-by-line inversion detection sub-unit output whether the testing result of the burst signal line-by-line inversion that obtains conforms to the burst signal line-by-line inversion of current selected standard
When testing result when not conforming to, then judge the actual standard of the CVBS signal that current selected standard is not current input; When testing result when conforming to, then judge the actual standard of the CVBS signal that current selected standard is current input.
Be not difficult to find that this execution mode is and the corresponding device embodiment of first execution mode, this execution mode can with the enforcement of working in coordination of first execution mode.The correlation technique details of mentioning in first execution mode is still effective in this execution mode, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in this execution mode also can be applicable in first execution mode.
What deserves to be mentioned is that each involved in this execution mode module is logic module, in practical application, a logical block can be a physical location, also can be the part of a physical location, can also realize with the combination of a plurality of physical locations.In addition, for outstanding innovation part of the present invention, will not introduce in this execution mode, but this does not show the unit that does not have other in this execution mode with solving the not too close unit of technical problem relation proposed by the invention.
Persons of ordinary skill in the art may appreciate that above-mentioned each execution mode is to realize specific embodiment of the present invention, and in practical application, can be in form with on the details it is done various changes, and without departing from the spirit and scope of the present invention.
Claims (16)
1. the automatic identifying method of a composite video broadcast singal standard is characterized in that, comprises following steps:
Step 1 is selected a kind of standard that does not detect from all possible standard, as the standard of the CVBS signal of current input;
Step 2 according to the parameter of current selected standard, is decoded to the CVBS signal of current input, obtains being used to judging the testing result of the key element of standard;
Step 3 judges whether all saidly to be used to judge that the testing result of the key element of standard conforms to said current selected standard that if not, then execution in step four; If then execution in step five;
Step 4 is judged the actual standard of the CVBS signal that said current selected standard is not said current input, returns execution in step one;
Step 5 is judged the actual standard of the CVBS signal that said current selected standard is said current input.
2. the automatic identifying method of composite video broadcast singal standard according to claim 1; It is characterized in that; Said all possible standard comprises: the phase-aoternation line system PAL (B that Germany uses; G, N), the phase-aoternation line system PAL (M) that uses of phase-aoternation line system PAL (D) that China uses, phase-aoternation line system PAL (I) that Britain uses, phase-aoternation line system PAL (H), the U.S. and Japan that Belgium uses quadrature amplitude balance system NTSC (M), frequency modulation system SECAM, Brazil of using, the phase-aoternation line system PAL (60) that use in the Chinese part area, the phase-aoternation line system PAL (CN) of Argentina's use, the quadrature amplitude balance system NTSC (4.43) of video tape recorder.
3. the automatic identifying method of composite video broadcast singal standard according to claim 1 is characterized in that, the parameter of said standard comprises: the frequency of standard, line frequency, field frequencies range, chrominance carrier.
4. the automatic identifying method of composite video broadcast singal standard according to claim 1 is characterized in that, saidly is used to judge that the key element of standard comprises: line frequency and field frequencies range, chrominance subcarrier frequency, burst signal line-by-line inversion.
5. the automatic identifying method of composite video broadcast singal standard according to claim 4 is characterized in that, in said step 3, comprises following substep:
A. judge that whether the said line frequency obtain and the testing result of field frequencies range conform to field frequencies range with the line frequency of said current selected standard, if not, then carry out said step 4; If, execution in step B then;
Whether the testing result of B. judging the said chrominance subcarrier frequency that obtains conforms to the chrominance subcarrier frequency of said current selected standard, if not, then carries out said step 4; If, execution in step C then;
Whether the testing result of C. judging the said burst signal line-by-line inversion that obtains conforms to the burst signal line-by-line inversion of said current selected standard, if not, then carries out said step 4; If then carry out said step 5.
6. the automatic identifying method of composite video broadcast singal standard according to claim 5 is characterized in that, in said steps A, comprises following substep:
Under the control of local clock, the time interval between the line synchronizing signal is counted; If count results is consistent with the standard value of the line synchronizing signal spacing of current selected standard, explain that the line frequency of the CVBS signal of current input conforms to field frequencies range with the line frequency of current selected standard with field frequencies range; Otherwise, explain that the line frequency of the CVBS signal of current input does not conform to field frequencies range with the line frequency of current selected standard with field frequencies range.
7. the automatic identifying method of composite video broadcast singal standard according to claim 5; It is characterized in that; In said step B,, attempt locking chrominance carrier phase-locked loop according to the chrominance subcarrier frequency of said current selected standard; If can not lock, explain that then the chrominance subcarrier frequency of the CVBS signal of current input does not conform to the chrominance subcarrier frequency of said current selected standard; If can lock, explain that then the chrominance subcarrier frequency of the CVBS signal of current input conforms to the chrominance subcarrier frequency of said current selected standard.
8. the automatic identifying method of composite video broadcast singal standard according to claim 5; It is characterized in that; In said step C,, detect the situation of burst signal line-by-line inversion according to the indication of said current selected standard; If detect the signaling mode that the line-by-line inversion that obtains meets current hypothesis, explain that then the burst signal line-by-line inversion of the CVBS signal of current input conforms to current selected standard; Otherwise, explain that the burst signal line-by-line inversion of the CVBS signal of current input does not conform to current selected standard.
9. the automatic identification equipment of a composite video broadcast singal standard is characterized in that, comprises: standard is selected module, parameter configuration module, CVBS decoder module, judge module;
Said standard selects module to be used for selecting a kind of standard that does not detect from all possible standard, as the standard of the CVBS signal of current input;
Said parameter configuration module is used for selecting according to said standard the parameter of the current selected standard of module, disposes said CVBS decoder module;
Said CVBS decoder module is used for the CVBS signal of current input is decoded, and obtains being used to judging the testing result of the key element of standard, and exports to said judge module;
Said judge module is used for according to the testing result of key element that is used to judge standard from said decoder module; Judge whether all saidly to be used to judge that the testing result of the key element of standard conforms to the current standard that said standard selects module to select; When said testing result all conforms to, judge the actual standard of the CVBS signal that said current selected standard is said current input; When having any one not conform in the said testing result, judge the actual standard of the CVBS signal that said current selected standard is not said current input, trigger the said standard of stating again and select module.
10. the automatic identification equipment of composite video broadcast singal standard according to claim 9; It is characterized in that; Said all possible standard comprises the phase-aoternation line system PAL (B that Germany uses; G, N), the phase-aoternation line system PAL (M) that uses of phase-aoternation line system PAL (D) that China uses, phase-aoternation line system PAL (I) that Britain uses, phase-aoternation line system PAL (H), the U.S. and Japan that Belgium uses quadrature amplitude balance system NTSC (M), frequency modulation system SECAM, Brazil of using, the phase-aoternation line system PAL (60) that China uses, the phase-aoternation line system PAL (CN) of Argentina's use, the quadrature amplitude balance system NTSC (4.43) of video tape recorder.
11. the automatic identification equipment of composite video broadcast singal standard according to claim 9 is characterized in that, the parameter of said standard comprises: the frequency of standard, line frequency, field frequencies range, chrominance carrier.
12. the automatic identification equipment of composite video broadcast singal standard according to claim 9 is characterized in that, saidly is used to judge that the key element of standard comprises: line frequency and field frequencies range, chrominance subcarrier frequency, burst signal line-by-line inversion.
13. the automatic identification equipment of composite video broadcast singal standard according to claim 12 is characterized in that, said decoder module comprises synchronous submodule, light tone segregant module;
Said synchronous submodule carries out synchronous detecting to the CVBS signal of said current input, and the testing result of line frequency that obtains and field frequencies range is exported to said judge module;
Said light tone segregant module further comprises chrominance carrier phase-locked loop, line-by-line inversion detection sub-unit;
Said chrominance carrier phase-locked loop locks the chrominance carrier of the CVBS signal of said current input, and the testing result of the chrominance subcarrier frequency that obtains is exported to said judge module;
Whether the CVBS signal that said line-by-line inversion detection sub-unit detects said current input exists the line-by-line inversion of burst signal, and the testing result of the burst signal line-by-line inversion that obtains is exported to said judge module;
Said judge module judges according to the said synchronous submodule and the testing result of light tone segregant module output whether the current standard that the said line frequency that obtains and field frequencies range, chrominance subcarrier frequency and burst signal line-by-line inversion and said standard select module to select conforms to; When said testing result all conforms to, judge the actual standard of the CVBS signal that said current selected standard is said current input; When having any one not conform in the said testing result, judge the actual standard of the CVBS signal that said current selected standard is not said current input.
14. the automatic identification equipment of composite video broadcast singal standard according to claim 13; It is characterized in that; Said synchronous submodule is counted the time interval between the line synchronizing signal under the control of local clock, and the said time interval is exported to said judge module as testing result;
Said judge module compares the standard value of the line synchronizing signal spacing of the said time interval and selected standard; When comparative result when being consistent, line frequency and the line frequency and the field frequencies range of the standard that field frequencies range meets current selection of the CVBS signal of said current input is described; When comparative result when being inconsistent, line frequency and the line frequency and the field frequencies range of the standard that field frequencies range does not meet current selection of the CVBS signal of said current input is described.
15. the automatic identification equipment of composite video broadcast singal standard according to claim 13; It is characterized in that; Said chrominance carrier phase-locked loop is according to the chrominance subcarrier frequency of said current selected standard; Attempt the said chrominance carrier phase-locked loop of locking, can lock said chrominance carrier phase-locked loop and export to said judge module as testing result;
When said testing result for can lock the time, explain that the chrominance subcarrier frequency of the CVBS signal of said current input meets the chrominance subcarrier frequency of the standard of current selection; When said testing result for can not lock the time, explain that the chrominance subcarrier frequency of the CVBS signal of said current input does not meet the chrominance subcarrier frequency of the standard of current selection.
16. the automatic identification equipment of composite video broadcast singal standard according to claim 13; It is characterized in that; Said line-by-line inversion detection sub-unit is according to the indication of said current selected standard; Detect the situation of burst signal line-by-line inversion, whether the line-by-line inversion that detection is obtained meets the signaling mode of current hypothesis is exported to said judge module as testing result;
When testing result when conforming to, explain that the burst signal line-by-line inversion of the CVBS signal of current input conforms to current selected standard; When testing result when not conforming to, explain that the burst signal line-by-line inversion of the CVBS signal of current input does not conform to current selected standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210214553.8A CN102740086B (en) | 2012-06-26 | 2012-06-26 | Automatic identification method and device of composite video broadcast signal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210214553.8A CN102740086B (en) | 2012-06-26 | 2012-06-26 | Automatic identification method and device of composite video broadcast signal system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102740086A true CN102740086A (en) | 2012-10-17 |
| CN102740086B CN102740086B (en) | 2015-01-28 |
Family
ID=46994765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210214553.8A Active CN102740086B (en) | 2012-06-26 | 2012-06-26 | Automatic identification method and device of composite video broadcast signal system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102740086B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717443A (en) * | 2013-12-12 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Method of automatically converting video of multiple formats to SMPTE274-protocol 1080i-resolution video |
| CN104717442A (en) * | 2013-12-12 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Method of automatically converting video of multiple formats to VESA (Video Electronics Standards Association)-protocol 1600*1200-resolution 60Hz-frame rate video |
| CN104717445A (en) * | 2013-12-12 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Method for automatically converting videos of multiple formats to video of BT.656 protocol NTSC format |
| CN106961598A (en) * | 2017-03-17 | 2017-07-18 | 浙江大华技术股份有限公司 | A kind of signaling mode determination methods and device |
| CN107222738A (en) * | 2017-06-22 | 2017-09-29 | 浙江大华技术股份有限公司 | A kind of video formats determine method and device |
| CN108881669A (en) * | 2018-07-02 | 2018-11-23 | 晶晨半导体(上海)股份有限公司 | Cvbs signal recognition method and system |
| CN110430382A (en) * | 2019-08-23 | 2019-11-08 | 中国航空无线电电子研究所 | Video recording apparatus with SD video depth detection function |
| WO2020020149A1 (en) * | 2018-07-25 | 2020-01-30 | 杭州海康威视数字技术股份有限公司 | Method and device for video signal identification, electronic device, and readable storage medium |
| CN110769176A (en) * | 2018-07-25 | 2020-02-07 | 杭州海康威视数字技术股份有限公司 | Video signal type identification method and device, electronic equipment and readable storage medium |
| CN110769180A (en) * | 2018-07-25 | 2020-02-07 | 杭州海康威视数字技术股份有限公司 | Video signal false lock identification method and device, electronic equipment and storage medium |
| CN111818289A (en) * | 2020-08-06 | 2020-10-23 | 深圳市视安通电子有限公司 | Full-standard video automatic identification system |
| CN112311959A (en) * | 2020-10-29 | 2021-02-02 | 济南浪潮高新科技投资发展有限公司 | Multi-channel analog camera data splicing processing system and method |
| CN112911188A (en) * | 2018-07-25 | 2021-06-04 | 杭州海康威视数字技术股份有限公司 | Video signal system identification method and device, electronic equipment and readable storage medium |
| CN114157908A (en) * | 2021-11-01 | 2022-03-08 | 富瀚微电子(成都)有限公司 | System identification method, device, equipment and medium for composite video broadcast signal |
| CN117596371A (en) * | 2024-01-18 | 2024-02-23 | 浙江芯劢微电子股份有限公司 | Method and device for judging phase alternating identification |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5134483A (en) * | 1990-02-22 | 1992-07-28 | Sgs-Thomson Microelectronics S.A. | Automatic connection system on a color tv s-vhs input |
| CN2178026Y (en) * | 1993-07-22 | 1994-09-21 | 东杰电气(中国)有限公司 | All-system colour TV |
| JPH1051809A (en) * | 1996-05-08 | 1998-02-20 | Deutsche Thomson Brandt Gmbh | Method and circuit device for identifying standard cvbs signal and non-standard cvbs signal |
| CN1275290A (en) * | 1998-06-29 | 2000-11-29 | 松下电器产业株式会社 | Color transmission system discrimination circuit in television set |
| CN1777257A (en) * | 2005-11-29 | 2006-05-24 | 天津三星电子显示器有限公司 | Method for automatically identifying received signal standard for analogue television signal receiver |
-
2012
- 2012-06-26 CN CN201210214553.8A patent/CN102740086B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5134483A (en) * | 1990-02-22 | 1992-07-28 | Sgs-Thomson Microelectronics S.A. | Automatic connection system on a color tv s-vhs input |
| CN2178026Y (en) * | 1993-07-22 | 1994-09-21 | 东杰电气(中国)有限公司 | All-system colour TV |
| JPH1051809A (en) * | 1996-05-08 | 1998-02-20 | Deutsche Thomson Brandt Gmbh | Method and circuit device for identifying standard cvbs signal and non-standard cvbs signal |
| CN1275290A (en) * | 1998-06-29 | 2000-11-29 | 松下电器产业株式会社 | Color transmission system discrimination circuit in television set |
| CN1777257A (en) * | 2005-11-29 | 2006-05-24 | 天津三星电子显示器有限公司 | Method for automatically identifying received signal standard for analogue television signal receiver |
Non-Patent Citations (1)
| Title |
|---|
| 丘衡等: "《大屏幕彩电中彩电制式的识别和转换电路》", 《今日电子》 * |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717445B (en) * | 2013-12-12 | 2017-11-24 | 中国航空工业集团公司第六三一研究所 | Automatic switching method of more video formats to BT.656 agreement TSC-system formula videos |
| CN104717442A (en) * | 2013-12-12 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Method of automatically converting video of multiple formats to VESA (Video Electronics Standards Association)-protocol 1600*1200-resolution 60Hz-frame rate video |
| CN104717445A (en) * | 2013-12-12 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Method for automatically converting videos of multiple formats to video of BT.656 protocol NTSC format |
| CN104717443A (en) * | 2013-12-12 | 2015-06-17 | 中国航空工业集团公司第六三一研究所 | Method of automatically converting video of multiple formats to SMPTE274-protocol 1080i-resolution video |
| CN104717443B (en) * | 2013-12-12 | 2017-08-25 | 中国航空工业集团公司第六三一研究所 | Automatic switching method from many video formats to SMPTE274 agreement 1080i resolution videos |
| CN104717442B (en) * | 2013-12-12 | 2018-02-09 | 中国航空工业集团公司第六三一研究所 | Automatic switching method of more video formats to VESA agreement 1600X1200 resolution ratio 60Hz frame-rate videos |
| US11039101B2 (en) | 2017-03-17 | 2021-06-15 | Zhejiang Xinsheng Electronic Technology Co., Ltd. | Systems and methods for identifying formality standard |
| CN106961598B (en) * | 2017-03-17 | 2019-02-12 | 浙江大华技术股份有限公司 | A kind of signaling mode judgment method and device |
| US11425327B2 (en) | 2017-03-17 | 2022-08-23 | Zhejiang Xinsheng Electronic Technology Co., Ltd. | Systems and methods for identifying formality standard |
| CN106961598A (en) * | 2017-03-17 | 2017-07-18 | 浙江大华技术股份有限公司 | A kind of signaling mode determination methods and device |
| CN107222738A (en) * | 2017-06-22 | 2017-09-29 | 浙江大华技术股份有限公司 | A kind of video formats determine method and device |
| CN108881669A (en) * | 2018-07-02 | 2018-11-23 | 晶晨半导体(上海)股份有限公司 | Cvbs signal recognition method and system |
| CN110769180B (en) * | 2018-07-25 | 2021-01-26 | 杭州海康威视数字技术股份有限公司 | Video signal false lock identification method and device, electronic equipment and storage medium |
| CN110769176B (en) * | 2018-07-25 | 2022-01-25 | 杭州海康威视数字技术股份有限公司 | Video signal type identification method and device, electronic equipment and readable storage medium |
| US11930158B2 (en) | 2018-07-25 | 2024-03-12 | Hangzhou Hikvision Digital Technology Co., Ltd. | Video signal identification method and apparatus, electronic device and readable storage medium |
| CN110769176A (en) * | 2018-07-25 | 2020-02-07 | 杭州海康威视数字技术股份有限公司 | Video signal type identification method and device, electronic equipment and readable storage medium |
| CN110769180A (en) * | 2018-07-25 | 2020-02-07 | 杭州海康威视数字技术股份有限公司 | Video signal false lock identification method and device, electronic equipment and storage medium |
| CN112911188A (en) * | 2018-07-25 | 2021-06-04 | 杭州海康威视数字技术股份有限公司 | Video signal system identification method and device, electronic equipment and readable storage medium |
| WO2020020149A1 (en) * | 2018-07-25 | 2020-01-30 | 杭州海康威视数字技术股份有限公司 | Method and device for video signal identification, electronic device, and readable storage medium |
| CN110430382A (en) * | 2019-08-23 | 2019-11-08 | 中国航空无线电电子研究所 | Video recording apparatus with SD video depth detection function |
| CN110430382B (en) * | 2019-08-23 | 2021-10-26 | 中国航空无线电电子研究所 | Video recording equipment with standard definition video depth detection function |
| CN111818289A (en) * | 2020-08-06 | 2020-10-23 | 深圳市视安通电子有限公司 | Full-standard video automatic identification system |
| CN112311959A (en) * | 2020-10-29 | 2021-02-02 | 济南浪潮高新科技投资发展有限公司 | Multi-channel analog camera data splicing processing system and method |
| CN114157908A (en) * | 2021-11-01 | 2022-03-08 | 富瀚微电子(成都)有限公司 | System identification method, device, equipment and medium for composite video broadcast signal |
| CN117596371A (en) * | 2024-01-18 | 2024-02-23 | 浙江芯劢微电子股份有限公司 | Method and device for judging phase alternating identification |
| CN117596371B (en) * | 2024-01-18 | 2024-04-30 | 浙江芯劢微电子股份有限公司 | Method and device for judging phase alternating identification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102740086B (en) | 2015-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102740086B (en) | Automatic identification method and device of composite video broadcast signal system | |
| KR19980024210A (en) | Raumdiversity-system | |
| US7430017B2 (en) | Device for automatically detecting broadcasting signal and method of the same | |
| CN106961598B (en) | A kind of signaling mode judgment method and device | |
| CN102238384A (en) | Multi-channel video decoder | |
| US7274408B2 (en) | [Method of motion detection for 3D comb filter video decoder] | |
| US7432987B2 (en) | Method of motion detection for 3D comb filter video decoder | |
| CN102387327B (en) | A kind of vision signal standard detection method and device | |
| US5512960A (en) | Adaptive type color demodulation apparatus for PAL system | |
| US20060077301A1 (en) | Secam color difference signal processing method | |
| JP2956233B2 (en) | Automatic color television standard identification method | |
| KR100247456B1 (en) | Chrominance noise reduction apparatus employing two dimensional recursive filter of multiplexed baseband color different component | |
| US6377310B1 (en) | Color transmission system discrimination circuit in television set | |
| US7777813B2 (en) | Color burst automatic detection device | |
| JPH04219085A (en) | Automatic connecting circuit for s-vhs input of color television receiver | |
| JPH07322280A (en) | Digital color signal demodulator | |
| CN102055990B (en) | Method and device for detecting PAL type video signal subcarrier phase conversion | |
| US5132782A (en) | Interleave detector of composite video signal | |
| KR0185937B1 (en) | Method & apparatus for detecting noise level of image signals | |
| JP2852256B2 (en) | Digital television signal processor | |
| JP2005057639A (en) | Secam signal discrimination device | |
| US20030048850A1 (en) | Composite video decoding | |
| JPH07298209A (en) | Television receiver | |
| JP2003018608A (en) | Device and method for determining secam signal | |
| JPH05145801A (en) | Impulse noise elimination device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160729 Address after: 215500 Jiangsu city of Changzhou province Changshu economic and Technological Development Zone Branch Chong Park Room 301 Patentee after: JIANGSU SMARTSENS TECHNOLOGY, LTD. Address before: 200001, room 803, B District, No. 666, Huangpu District, Shanghai, Beijing East Road Patentee before: Shanghai Echipmicro Co., Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20181009 Address after: 200233, 11 floor, innovation building, 1009 Yishan Road, Xuhui District, Shanghai. Patentee after: Shanghai Ye Core Electronic Technology Co. Ltd. Address before: 215500 Room 301, science and Technology Development Zone, Changshu economic and Technological Development Zone, Changzhou, Jiangsu Patentee before: JIANGSU SMARTSENS TECHNOLOGY, LTD. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: Room 612, 6th floor, No. 111 Building, Kexiang Road, China (Shanghai) Free Trade Pilot Area, Pudong New Area, Shanghai, 2001 Patentee after: STEVE (SHANGHAI) ELECTRONIC TECHNOLOGY CO., LTD Address before: 200233, 11 floor, innovation building, 1009 Yishan Road, Xuhui District, Shanghai. Patentee before: Shanghai Ye Core Electronic Technology Co. Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 612, 6th floor, No. 111 Building, Kexiang Road, China (Shanghai) Free Trade Pilot Area, Pudong New Area, Shanghai, 2001 Patentee after: Starway (Shanghai) Electronic Technology Co.,Ltd. Address before: Room 612, 6th floor, No. 111 Building, Kexiang Road, China (Shanghai) Free Trade Pilot Area, Pudong New Area, Shanghai, 2001 Patentee before: Siteway (Shanghai) Electronic Technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |