CN1871852A - Method and system for enhanced modulation of video signals - Google Patents

Method and system for enhanced modulation of video signals Download PDF

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Publication number
CN1871852A
CN1871852A CN 200480031483 CN200480031483A CN1871852A CN 1871852 A CN1871852 A CN 1871852A CN 200480031483 CN200480031483 CN 200480031483 CN 200480031483 A CN200480031483 A CN 200480031483A CN 1871852 A CN1871852 A CN 1871852A
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signal
matrix
hidden
vision signal
pixel
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C·E·查普
M·S·格莱梅尔斯帕切
J·J·乔纳德二世
J·G·维萨斯
Y·H·巴苏姆
M·C·雷诺兹
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Koplar Interactive Systems International LLC
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Koplar Interactive Systems International LLC
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Abstract

Method for encoding carrier signal (20) in video signal (18), video signal having one or more frames, frames each having first field and second field, first field and second field of each frame having plurality of scan lines, each having plurality of pixels with intensity value indicating brightness, method characterized by selectively designating plurality of scan lines of first field of one or more frames as up lines or down lines (83), calculating optimum amount of adjustment to pixels of up lines and down lines (84), and selectively increasing intensity value of pixels of up lines and decreasing intensity value of pixels of down lines by optimum amount of adjustment (86) thereby modulating video signal with carrier signal and creating modulated video signal (22).

Description

The method and system that is used for the vision signal enhanced modulation
The cross reference of related application
The application enjoys the rights and interests of following application: Jesse J.Chounard II, that Christopher E.Chupp and Michael S.Gramelspacher submitted on August 26th, 2003, sequence number No:60/498,039 is entitled as the U.S. Provisional Patent Application of " method and system of the spread-spectrum modulation of vision signal (SpreadSpectrum Frequency Modulation of Video Signals) "; Michael S.Gramelspacher, James G.Withers, Jesse J.Chounard II, Christopher E.Chupp, Yousri H.Barsoum, the sequence number that Michael C.Reynolds and Matthew Talbert submitted on September 10th, 2003 is No:60,502,136 are entitled as the U.S. Provisional Patent Application of " with the method and system (Method and System forDetection of Carrier Signals Within Video Signals by MagnitudeChanges) of carrier signal in the amplitude change-detection vision signal "; Chistopher E.Chupp, the sequence number that Michael S.Gramelspacher and Jesse J.Chounard II submitted on March 18th, 2004 is No:60/554, and 151 are entitled as the U.S. Provisional Patent Application of " method and system (Method and Systemfor Video Signal Image Analysis) that video signal image is analyzed "; And ChristopherE.Chupp, Michael S.Gramelspacher, Jesse J.Chounard II, James G.Withers, the sequence number that Yousri H.Barsoum and Michael C.Reynolds proposed on July 9th, 2004 is No:10,888,919 are entitled as the non-temporary patent application of the U.S. of " method and system (Method and System for Enhanced Modulation of Video Signals) that is used for the vision signal enhanced modulation ", and all above-mentioned each files all are contained in this by reference and ask their continuation is kept.
Background of invention
The present invention relates to method that the carrier signal that is used as signaling in the vision signal is encoded and detected.Relate in particular to a kind of method and device, this method and device are applicable to be determined required optimization level and the position that is modulated into the carrier signal of live part in the vision signal separated carrier signal with the third party who prevents conspiracy with vision signal, and improves the detectability of the carrier signal in vision signal under the condition of the definition that reduces the video signal image that offers the beholder not obviously.
At present, this area exists the whole bag of tricks that carrier wave (or subcarrier) transmits with vision signal, and wherein, carrier signal is used as various signalings.In these methods several method is arranged, be to transmit carrier signal in the vision signal by the live part that replaces vision signal with auxiliary data, for example, carrier signal with the auxiliary data form, make and (for example watch its display device, the user of the vision signal television set) will see icon, the influence of the carrier signal of forms such as idea or other visual image or interference in image.Other method is used in then that invisible scan line transmits carrier signal in the vision signal, for example, adopts the method for vertical blanking interval (VBI).Yet these scan lines may contain other carrier signal, for example represent the signal of caption information, time sequence information or end heading message, and are easy to be removed by the editing personnel before broadcasting.
Other method that is used for transmitting the carrier signal of vision signal can be referring to the United States Patent (USP) 4,807,031 of investing people such as Broughton, be entitled as " method of interactive video and device (Interactive VideoMethod and Apparatus) ".This patent relates generally to video broadcasting in the band of the instruction of interactive device and other coded message, and this patent comprises therewith by reference.Wherein said invention relates generally to mutual education and entertainment systems, and narrated as TV programme control carrier content with television receiver in one embodiment.
For paired domination number according to encoding, Broughton has disclosed and a kind of vision signal has been carried out brightness or colourity modulation to produce the new method of composite video signal, wherein, this vision signal is modulated by control data.This novel modulator approach alternately promotes and is lowered into the brightness/chroma of right adjacent level scan line so that form the video subcarrier that comprises control data.
In the Broughton patent, vision signal does not replace with other data, neither add data in the vision signal to as a signal that separates.But vision signal itself is modulated to carry control data.Therefore, control data is the part in the vision signal or is included in a part in the vision signal, but it be human eye can not discover.This coding method also comprises checks and removes circuit existing and the removal of digital coding with the well-formedness that guarantees digital coding respectively or digital coding in advance.
Control data is that the video player of prerecording that is connected by television broadcasting apparatus or with video display transmits.Then, video display receives control data, and wherein at least one video field of video display can be modulated by control data.Then, control data is detected with photoelectron or radio frequency (RF) checkout gear, is used for differentiating to detect control data between program material and control data.Control data also can reproduce detected control data, so that can be used by interactive device.
At United States Patent (USP) 6,094,228 (people such as this patent authorizing Ciardullo) and United States Patent (USP) 6,229,572 (people such as this patent authorizing Ciardullo) have been discussed the improvement (being collectively referred to as " Ciardullo " here) of the modulator approach that Broughton is narrated.Two patents state of Ciardullo to the improving one's methods of signal modulation, wherein,, in the viewable portion of vision signal, insert auxiliary data by in the brightness that changes in the opposite direction scan line.Rather than as Broughton, promote and reduce the intensity of whole line, Ciardullo uses pseudo noise sequence to promote and reduce the intensity of first-line part, and adopt contrary pseudo noise sequence to modulate the line paired with first line, thereby Ciardullo can modulate relatively large auxiliary data by using pseudo noise sequence to make in vision signal.The patent of Ciardullo is had by assignee of the present invention, and this paper quotes this patent for consulting.
United States Patent (USP) 6,661,905 (people such as this patent authorizing Chupp (hereinafter to be referred as Chupp)) disclosed and be modulated at improving one's methods of data in the vision signal live part.Chupp disclosed a kind of on the viewable portion of vision signal the method for superposition of data.This method comprise step: the form by defined image of vision signal and pixel analyzed is so that the data of the parameter relevant with each pixel are carried in identification; Develop a chip features table, has the numerical data that expression is about to be superimposed upon each chip amplitude of vision signal relevant position in the table, each chip has the feature of change, and this feature is by by the chip amplitude of using gained that the parameter of vision signal and the synthetic composite signal of chipset is determined; And transmit this composite signal.The patent of Chupp is also had by assignee of the present invention, and this paper quotes this patent for consulting.
The time of the present invention, in the conformable display (for example, the television set of TSC-system formula) by using the fluorescent coating that the fine pitch electron beam clashes on the inner surface of cathode ray tube (CRT) to work, the light intensity that fluorescent material is launched is the function of the electron beam intensity of bump fluorescent material.Electron beam scans the CRT face fully to show 1/60 second time cycle of field picture needs.In 1/60 second that follows time cycle, the field of scanning interlacing is so can see a frame of finishing on conformable display.Fluorescent coating on the surface of cathode-ray tube is so that the radiative characteristic of fluorescent material can keep the of short duration time through chemical treatment.Like this, when beam return (promptly vertical return during) to the top of screen so that it just beginning to decay in the first area of scan image when refreshing.Because the electron beam per second covers 525 lines 30 times, so can see 15750 lines altogether each second.
The method of Broughton is encoded to the carrier signal in the vision signal, and the improvement of this method mainly is used for conformable display spare.In case receive the vision signal from signal source, then this display device is divided into the image that the order that is referred to as frame transmits to vision signal, and therefore every frame ntsc television image has 525 horizontal scanning lines.Display device is interlacing scan 262.5 horizontal lines from left to right and from top to bottom, thereby finish first scanning, and flyback is to the top of image then, and 262.5 lines that scanning is remaining are as second.These are interleaved in display device and constitute a complete frame.When vision signal during with every frame 525 lines and the broadcasting of one second 30 frame, then per second just has 60, and line frequency speed (that is, line refresh speed) is 15,750 hertz (that is, near 16KHz).
For being detected by unwarranted third party, change or remove the example of carrier signal, use the method for Broughton and other coding carrier signal not have enough robustnesss.According to the method for Broughton, unwarranted third party can detect the frequency that has carrier wave, and can use electronic device to isolate carrier signal when keeping vision signal basically.By detecting, remove or change additional benefit or the access rights that carrier signal will make unwarranted third party to obtain did not have qualification to obtain originally, for example, when using carrier signal to limit that vision signal is unwarranted duplicates.
According to the present invention, the coding frequency by the generation expanded in frequency spectrum just may reduce unwarranted detection, removes or change the possibility of carrier signal.Generally, spread spectrum technique is used for radio communication, and wherein the frequency of transmission signals can change intentionally.So signal just can transmit on the bigger bandwidth of the signal that can not change than frequency.Therefore, if when existing tangible interference on a certain characteristic frequency, then the ruined possibility of signal is just fewer.In addition, the spread spectrum from single-frequency to a plurality of frequencies can improve the degree of difficulty that unwarranted third party disturbed or tackled carrier signal greatly.
Because have a frequency on the video scan lines and produce carrier signal being superimposed upon with the pattern of rule, so just wish that the position and the level that can change vision signal change its intensity, thereby the frequency by modulating video signal produced can take place in the scope of broad.Therefore, modulating video signal just need be removed in the spread spectrum scope with carrier signal in this area, wherein, can be in the existence that does not have to detect under the condition of paired scan line carrier signal, do not make vision signal invisible and do not make under the condition of image generation distortion and just be difficult to carrier signal is got rid of from vision signal like this.
Though the improving one's methods of Broughton and other often used by people institute at the very start and accepted well, the carrier signal in the image of display device relatively is difficult for finding out and the convenience that uses detector or hand-held device to detect carrier signal from display device still can be improved.When the voltage that increases carrier signal when improving the detectability of carrier signal, may occur in the tendency that the visuality of carrier signal of the live part of vision signal slightly increases.At this moment, the beholder of television set understands the existence of finding out the carrier signal on visual picture indistinctly, for example, sees that any visible scan line or the picture quality of seeing slightly reduce.Because one of advantage of the method for use Broughton is its not visible property for human eye, therefore see that any tendency of the influence of carrier signal is that people are undesirable.
The challenge of not visible property generally is to adopt the way that reduces the voltage (that is, as the brightness that produces) that is added to selected video scan lines or therefrom removes to solve.Yet, reduce the reliability that total signal strength can reduce the detected carrier signal.Though Broughton technology and improved success thereof, promptly the result of the modulation of vision signal is not less than visible change under the sightless basically threshold with carrier signal, but this area still needs a kind of new method and system that is used for the carrier signal modulating video signal, wherein, signal is can be more invisible fully but still can be detected more reliably.
The vision signal of being modulated is easy to be altered, because the size of signal can change or change otherwise and vision signal is become be not interleaved.When vision signal becomes interlacing scan again, it may change, make that line between first and second can be by the reading of detector mistake to the difference of line, thereby be offset carrier signal, make it not be on the desirable line and be in other words on undesirable line.The detection of carrier signal, removal or change can provide unwarranted third party to obtain did not have the additional benefit or the access rights of qualification acquisition originally.Therefore, the carrier signal modulating video signal need be used in this area, and wherein the existence of carrier signal can also detect to the difference of line is big or small by the line that detects in of vision signal.
Summary of the invention
The following improvement of adopting the carrier signal modulating video signal is based on Broughton, the improvement of method and apparatus disclosed in Ciardullo and the Chupp.The present invention relates to be applicable to the carrier signal of optimizing the live part that is inserted in vision signal, thereby increase the detectability of carrier signal and concerning the people who watches, increase the method and apparatus of the variation of vision signal indistinctively.
At first, vision signal is sent to encoder from signal source.Operator and encoder are alternately to control its operation.After this, carrier signal is encoded in a time interval selectively by encoder and makes signaling in the vision signal.For example, in vision signal, send the usefulness that there is not or exists signal in (being carrier signal) in the desirable time.After vision signal was modulated, encoder produced a vision signal that comprises the modulation of vision signal and carrier signal.Then, this modulating video signal is offered broadcast source and give the end user who sees program (beholder) with branch.
The method that carrier signal is coded in the vision signal comprises that encoder obtains vision signal from signal source.This encoder produces the three-dimensional matrice of being made up of the hidden parameter of signal then.This three-dimensional matrice comprises the submatrix of a plurality of bidimensionals.Each submatrix is corresponding to specific concealing technology used in the present invention.Concealing technology is a kind of method, uses the image that this method can be added on the specific pixel in the vision signal and can significantly not change vision signal to the amount of calculation of intensity.Each submatrix of the hidden matrix of three dimensional signal all contains a parameter list, and its value is directly corresponding to the pixel of the similar location of a frame video signal.In case produced the hidden matrix of three dimensional signal, then the hidden matrix of three dimensional signal just is transformed into the hidden matrix of two-dimensional signal.
Encoder also produces the three-dimensional matrice of being made up of limiting parameter.This three-dimensional restriction matrix comprises one or more bidimensional siding stopping matrixes, and each submatrix comprises the relevant and expression of some pixels with a frame video signal can be added to the respective pixel of vision signal based on the specific limited technology the maximum of intensity.After this, encoder is transformed into the bidimensional restriction matrix to three-dimensional restriction matrix.
After in case the generation of hidden matrix of signal and restriction matrix and conversion are finished, encoder with regard to the hidden matrix of comparison signal and restriction matrix to produce actual coded number value matrix, this actual coded number value matrix comprises the maximum of the hidden matrix of two-dimensional signal, this maximum is subjected to the maximum of bidimensional restriction matrix, but the i.e. restriction of maximum permissible level.Then, this encoder is regulated the actual coding numerical matrix by its current numerical value relatively with baseline value and is added on the needed part of vision signal with the minimum levels of assurance with signal.
This encoder is added to the direction of carrier signal on the amplitude of actual coding numerical matrix intermediate value then.After finishing, encoder is added to the numerical value in the actual coding numerical matrix on the vision signal according to the video modulation technology.
Terminal use's broadcast source provides modulating video signal to decoder, and this decoder determines whether exist carrier wave at interval and respond according to the needed application of employed decoder in modulating video signal in a period of time.
Other advantage of the present invention and new feature will be narrated below, and those skilled in the art will being described in detail and accompanying drawing below reading, and other advantage of the present invention and new feature get this obviously.In specification and accompanying drawing, similarly unit and parts will be denoted by the same reference numerals.
Brief Description Of Drawings
Fig. 1 is the first pass figure of coding method of the present invention.
Fig. 2 is the first pass figure of coding/decoding method of the present invention.
Fig. 3 is the block diagram of encoder of the present invention.
Fig. 4 is the block diagram of decoder of the present invention.
Fig. 5 is second flow chart of coding method of the present invention.
Fig. 6 is first sequential chart of prior art of the present invention.
Fig. 7 is 8KH zThe sequential chart of signal.
Fig. 8 is 8KH zAnd 16KH zThe sequential chart of signal.
Fig. 9 is second sequential chart of prior art of the present invention.
Figure 10 is a sequential chart of the present invention.
Figure 11 is second flow chart of coding method of the present invention.
Figure 12 is the flow chart of the hidden matrix creation method of signal of the present invention.
Figure 13 is the flow chart of the hidden matrixing method of signal of the present invention.
Figure 14 is the flow chart of restriction matrix creation method of the present invention.
Figure 15 is the flow chart of restriction matrix transform method of the present invention.
Figure 16 is the flow chart of actual coding numerical matrix creation method of the present invention.
Figure 17 is the flow chart of carrier signal applying method of the present invention.
Figure 18 is the flow chart of signal concealment method of the present invention.
Figure 19 is the flow chart of signal limitations method of the present invention.
Figure 20 is the flow chart of the present invention's first coding/decoding method.
Figure 21 is the flow chart of the present invention's second coding/decoding method.
Figure 22 is the flow chart of numerical computation method in the scope of the present invention.
Figure 23 is first histogram that numerical value produces in the scope of the present invention.
Figure 24 is second histogram that numerical value produces in the scope of the present invention.
Figure 25 is the flow chart of the present invention's the 3rd coding/decoding method.
Figure 26 is the flow chart of detection method of the present invention.
Figure 27 is that the present invention detects/block diagram of decoder.
Figure 28 is the flow chart of the present invention first around processing method.
Figure 29 is the flow chart of the present invention second around processing method.
Being described in detail of the embodiment of the invention
Consult accompanying drawing, Fig. 1～29 show a kind of carrier signal that is applicable to and optimize modulator approach, device and system in the vision signal live parts, and wherein this method can make carrier signal can not easily be separated and strengthen the detectability of carrier signal and can not make the beholder significantly increase the sensation that vision signal is changed simultaneously.
Consult Fig. 1, vision signal 18 is sent to encoder 12 from signal source 10.This vision signal 18 is the analog signal of NTSC (National Television System Committee) form preferably, but this vision signal also can be other vision signal or the video signal format compatible with the present invention.In general, signal source 10 is professional video tape recording playback instrument, comprises programme content in the video tape, but it also can be other video source that has video camera, or comprises digital universal optic disk (DVD) player of the DVD video of video frequency program.12 of encoders are described in detail following.
Operator 16 and of the work of encoder 12 reciprocations with controlled encoder 12.Preferably, operator 16 is one and uses a computer or other control electronics and encoder 12 carry out mutual personnel.Yet operator 16 also can follow computer or other control electronics of operating with automated manner indication encoder 12 fully.
Carrier signal 20 can by operator 16 utilize encoder 12 at a certain time interval selectively in the vision signal internal modulation to make the usefulness of signaling, for example, have or do not exist signal during the desired vision signal 18 in order to be illustrated in.Behind modulating video signal 18, the vision signal 22 that encoder 12 outputs are modulated, this modulating video signal 22 comprises vision signal 18 and carrier signal 20.The process of modulating video signal will be described in detail below.
So, the vision signal 22 of modulation is offered broadcast source 14, to send to the terminal use who sees video frequency program.Broadcast source 14 is DVD medium or other digital storage media preferably, can be in order to offer one or more terminal uses.But these medium can be other medium also, comprise video tape, television broadcasting station, the cable of broadcast program or satellite source or radio sources.
Consult Fig. 2, broadcast source 14 offers detector 13 to the vision signal 22 of modulation.Be described in detail as following, detector 13 preferably at certain time intervals (for example passes through, the field of some or frame, time signal or second) if confirming whether to exist carrier signal 20 carrier signals 20 to the difference of line in modulating video signal 22, a plurality of lines of interior a plurality of opposite field vision signals 18 exist, the indication that just there is carrier signal 20 in detector 13 offers the device 24 of received signal, is the signal that it provides carrier wave to exist.If confirm not have during this time interval carrier signal to exist, decoder 22 just sends the non-existent signal of carrier wave.The device 24 of received signal preferably can anyly install, as long as it can receive and utilize one or more signals (for example not exist, carrier signal 20 does not exist) and signal have (for example carrier signal 20 exist), for example, the device of this received signal can be a digital video video device, and it uses and does not exist and exist signal to indicate allowing the affirmation of playback or recorded video program.
Detector 13 offers display device 26 to the vision signal 22 of modulation.This display device 26 can be the digital video recorder instrument, but also can be other device, as long as it can show and/or write down the vision signal 18 such as simulation or Digital Television.The device 24 of display device 26 and received signal can be combined into a signal element.
Now, see also Fig. 3, the figure shows the preferred embodiment of encoder 12.It at first comprises digital video input 30, is used for delivering to encoder microcontroller 36 from signal source 10 receiving video signals 18 and with it.But, encoder 12 also can by analog video import 32 and analog-digital converter 34 receive analog video signals 18.Analog-digital converter 34 can be according to known technology with analog video signal 18 digitlizations, thereby it is offered encoder microcontroller 16 to be used for the present invention.
Encoder micro controller 36 is electrically connected then, and a carrier wave exists 38.It can for where the encoder microcontroller be provided under operator's instruction, when, encoder 12 should selectively promote and reduce the timing of the intensity of vision signal 18 or its part of scanning line under what intensity.Preferably, carrier wave exists 38 can receive this instruction by a serial port.Yet should be appreciated that in the hardware art of computer the interconnection of the miscellaneous equipment of encoder 12 comprises by USB (USB), " live wire " agreement (IEEE1394) and various wireless protocols.In another embodiment, carrier wave exists 38 can be an operation interface, make operator 16 can be directly and encoder 12 mutual.In another embodiment, carrier wave exists 38 can be realized being combined into one with encoder software 50 by encoder software 50.
When encoder microcontroller 36 receives when having 38 information and vision signal 18 from carrier wave, (and/or monochrome information is stored in the memory 40 as required) the chrominance information of vision signal 18 for other work of software 50 management encoders 12 and command encoder microcontroller 36.Memory 40 can keep and stick signal (for example, the frame of vision signal 18 and corresponding audio signal) with electromagnetic mode, so that computer processor carries out access.This memory 40 can be main storage and/or external memory, and can comprise memory and hard drive.
Encoder electronic equipment 42 and encoder microcontroller 36 according to software 50 instructions use the present invention as the following detailed description that carrier signal 20 is modulated into the brightness of vision signal 18, thereby form the vision signal 22 of modulation.The vision signal 22 that the modulating video signal 22 that is produced becomes analog form and modulates by analog video output 48 outputs from the digital signal that encoder 12 digitlizations send or 46 conversions of employing digital analog converter produce by digital video input 44.Yet, should be noted that, encoder 12 (and the following detector that will narrate 13) does not need to comprise the digital video input 30 and the digital video output 44 of making up with analog video input 32 and analog video output 48, but can select one of them for encoder 13.
Encoder microcontroller 36 can comprise that a plurality of processors and/or microprocessor manage various processing of the present invention and input and output, but preferably includes only a processor.In addition, before its technology is included in, with regard in the already present device time, for example, not in the independent conventional apparatus time, encoder 12 used electronic circuit and softwares can have nothing in common with each other.Encoder 12 can comprise hardware and software in various degree, as the various parts that can exchange use.
Consult Fig. 4 now, when signal 22 was analog signal, detector 13 received the vision signal 22 of modulation via analog video input 32; When signal 22 is digital signal, receive the vision signal 22 of modulation via digital video input 30.Digital video input 30 can directly be fed to detector processes device 60 to modulated vision signal 22, and analog video input 32 then can be carried out digitlization with the vision signal 28 of 34 pairs of modulation of analog to digital converter earlier before the vision signal 22 of modulation is fed to detector processes device 60.
In this preferred embodiment, detector processes device 60 is stored in the colourity of modulating video signal 22 among the memory 40, and detector electronics 62 then detection has increased or reduced the scan line or the part of scanning line of the modulating video signal 22 of intensity.To narrate the embodiment of the used detection scheme of the present invention below.
Not existing of the existence of signal and signal will be sent to signal receiving device 24 from detector 13 by carrier wave indicating device 68.Detector 13 is also with the vision signal 22 of digital form by vision signal output 44 output modulation, and by using digital to analog converter 46 at first signal 22 to be become analog form and with analog form output modulating video signal 22, exports 48 output signals 22 by analog video then from digital translation.
Consult Fig. 5, general-purpose coding method of the present invention comprises first step 80, and wherein, encoder 12 obtains vision signal 18 from signal source 10.After this, operator's 16 command encoders 12 are modulated one or many vision signals 18 at a certain time interval in step 81, and this instruction exists 38 to receive by encoder 12 by carrier wave.Preferably, a plurality of adjacent first in vision signal 18 consecutive frames is encoded, each second in vision signal 18 frames is not then encoded.Yet, should also be noted in that for term used in the present invention " first " can be second interlaced field in the frame of first primary field or vision signal 18, employed here " second " is other.In addition, term " first " and " second 's " use can be meant the subdivision of the field in the vision signal 18, all scan lines that are not like this and be that a plurality of scan lines are referred to as " first " and " second ".
Encoder 12 determines at decision-point 82 whether encoder 12 encodes to the vision signal 18 when the front court based on the original operator who receives instruction.If not, then encoder 12 is skipped current field and is entered into determination point 87.If, then encoder 12 in step 83 with first scan line of designated signal 18 for reaching the standard grade or rolling off the production line, so that the pixel intensity (will be described in detail hereinafter) of reaching the standard grade and having only the pixel intensity of increase and rolling off the production line and have only reduction.After this, encoder 12 is in the optimization regulated quantity (will be described in detail hereinafter) of step 84 calculating pixel.
The pixel of encoder 12 on step 86 pair selected reaching the standard grade gained in strength and selected pixel on rolling off the production line reduced intensity (this process will be described in detail hereinafter).After the end, encoder 12 determines whether that at determination point 87 all the other fields of vision signal will be analyzed in addition.If any, encoder 12 advances in the vision signal 18 next in step 88, and turns back to determination point 82.If no, encoder 12 offers broadcast source 14 in step 89 with formed modulating video signal.
Different with Broughton and Ciallduro method, encoder 12 does not preferably need to make the scan line of vision signal 18 paired for the field that is encoded in aforementioned cataloged procedure, so that scan line (for example is in high/low structure in whole modulated Field, first line has the intensity of increase, and second line has the intensity of reduction, three-way intensity with increase, and the 4th line has the intensity of reduction, and so on).But the irregular structure of scan line that contains the high/low or low/High variation of some in one adjacent scanning lines will produce the difference of tangible line to line, make detector 13 to identify to be present in the carrier signal in the modulating video signal 22 and can not produce the easy detected frequency of unwarranted device.For instance, in the present invention, detector 13 identifies a modulated field with two adjacent scanning lines of gaining in strength, and a scan line has the intensity of reduction, and a scan line has the intensity of increase, and has the intensity of reduction more than two scan lines.Preferably, scan line need not form high/low structure in whole, and this will carry out detailed narration hereinafter.
Line is shown among one to the difference table of line, exists the intensive quantity of the increase that can be discovered in a pair of adjacent scan line, and preferably, in the present invention, each bar scan line is not paired in whole.When increasing and reduce voltage on adjacent scanning lines, will strengthen and detect the ability of this line, so relatively can disclose the non-natural change that is in the total intensity between the two adjacent scan lines scan line to the difference of line.Though the video frequency program that can express by vision signal 18 present the signal difference amount that may provide limited naturally, by first and second unmodulated comparison this measures of dispersion of removal from observability effectively just.
Consult Fig. 6, there is shown first image 200, it comprises with four scan lines of the described method of Broughton with the modulating video signal 22 of high/low structured coding.Shown in second image 202, two scan lines that the method that adopts Ciduullo to discuss is encoded, and shown with the chip mode configuration.Preferably the present invention is unlike among the Broughton and like that a whole scan line is promoted and reduce intensity, and the present invention is also without the chip pattern of Ciduullo.The substitute is, the present invention increases selectively each pixel in the scan line or removes intensity, and this will be narrated hereinafter in detail.Not having paired scan line and use the high and low changeable mode that changes just can produce in whole can't be detected or the various frequencies of removal with single wave filter.
Consult Fig. 7, the Broughton modulation result of the paired scan line in the vision signal 22 of a modulation is the 8KH shown in first image 204 zVision signal, it produces the frequency of signal shown in second image 206, and this signal frequency just can detect with a filter.
Consult Fig. 8,, the second frequency such as the 16KHz signal is added to the 8KHz signal among the Broughton shown in first image 208, spread-spectrum so that final frequency be very difficult to be detected by person without permission, shown in second image.First image 212 among Fig. 9 shows reading and the horizontal-drive signal synchronised of carrier signal 20 among the Bnoughton, and has produced the corresponding frequencies of approximate 8KHz shown in second image 214.
Consult Figure 10, the variable variation of the intensity of preferred embodiment of the present invention is shown in first image 216, and it has produced some frequencies, thereby has expanded frequency spectrum so that there is not single frequency, shown in second image 218.Because the pattern of carrier signal 20 that in the present invention can be modulated changes, the frequency that is produced will depend on how scan line encoder 12 increases or reduce the intensity of pixel and to changing by the voltage that increases or reduce these pixels.
Consult Figure 11, the figure shows the method for determining the optimization level of the carrier signal 20 of pixel on vision signal 18 scan lines, at first comprise step 102, wherein, device (for example, encoder 12 or detector 13) produces the three-dimensional matrice of being made up of the hidden numerical value of signal (this will be described in detail hereinafter).This three-dimensional matrice comprises a plurality of two-dimentional submatrixs, and each submatrix is corresponding to a kind of specific concealing technology used in the present invention.Each submatrix of the hidden matrix of three dimensional signal comprises directly the submatrix (that is table) corresponding to the location of pixels of a frame video signal 18 similar location.The numeric representation that is recorded in the position of submatrix can be increased to respective pixel (if scan line is to roll off the production line based on specific concealing technology, then therefrom deduct) the maximum intensity amount, wherein each concealing technology can be represented a different numerical value according to the measurement numerical value that is obtained.
In case produced after the hidden matrix of this three dimensional signal, the hidden matrix of this three dimensional signal is transformed into the hidden matrix of a two-dimensional signal (this will be described in detail hereinafter) in step 104.By the hidden matrix of this three dimensional signal of conversion, this device has a hidden matrix of two-dimensional signal, and this bidimensional matrix has the numerical value of a plurality of signal concealing technologies according to all uses corresponding to the hidden ability of peak signal of the respective pixel of the frame of vision signal 18.
This device produces the three-dimensional matrice of being made up of limiting parameter (this will be described in detail hereinafter) in step 106.This three-dimensional restriction matrix comprises one or more bidimensional siding stopping matrixes, each submatrix comprises a numerical tabular, and its and expression related with the pixel of a frame video signal 18 can be increased to respective pixel or the maximum (this will be described in detail hereinafter) of the intensive quantity that deducts from respective pixel based on restriction technologies.
Then, this device should be transformed into bidimensional restriction matrix (this will be described in detail hereinafter) by the three-dimensional restriction matrix in step 108.Should the three-dimensional restriction matrix by conversion, this device has the bidimensional restriction matrix that contains numerical tabular, and it is corresponding to changing the maximum that rises to the intensive quantity of a frame video signal 18 respective pixel before may being perceived by the spectators of vision signal.
In case after generation and the hidden matrix of figure signal and restriction matrix finished, this device compared hidden matrix of signal and restriction matrix to form actual coded number value matrix (this will be described in detail hereinafter) in step 110.This actual coded number value matrix comprises the maximum of the hidden matrix of two-dimensional signal of the maximum that is limited by the bidimensional restriction matrix.In step 112, this device is regulated actual coded number value matrix guaranteeing and can be added to minimum signal level on the required part of vision signal 18 by its value and a plurality of baseline value are compared, though this device previous determined to gain in strength again might in the image of vision signal 18, produce an a spot of vision interference.
In case be provided with the size of actual coding numerical value, this device can be added to the direction of carrier signal 20 on the amplitude of actual coding numerical matrix intermediate value (this will be described in detail hereinafter) in step 114.Therefore, the intensive quantity that will increase or reduce pixel for vision signal 18 particular frames is represented to be applicable in the position of actual coding numerical matrix.
After finishing, the hidden optimization method of signal is promptly accused and is finished, and therefore this device can be applied to vision signal 18 to the numerical value in the actual coding numerical matrix, as hereinafter being described in detail according to video coding technique.In addition in a preferred embodiment without the equipment of all numerical value of actual coding numerical matrix position can optionally use these all numerical value of position at random or the pseudorandom part so that further reduce the possibility that spectators see carrier wave 20 in vision signal 18.
Consult Figure 12, there is shown the process that produces the hidden matrix of signal.This process comprises first step 120, and wherein, this device produces the submatrix that is applicable to specific concealing technology.This submatrix has the signal concealed location corresponding to each pixel of the frame of vision signal 18 or its specific part.After this, this device is estimated the pixel of vision signal 18 in step 122 according to specific concealing technology, for example, and edge coding technology (this will be described in detail hereinafter).In step 124, the records of values that this device will obtain by the signal concealing technology is on the submatrix position corresponding to the pixel of the frame of vision signal 18.In case after numerical value was recorded, in step 126, the submatrix of signal concealing technology was added to the hidden matrix of signal.
This device determines whether to be applicable to other signal concealing technology of vision signal 18 particular frames thereafter at determination point 128.If any, this device just returns step 120, creates new submatrix for being applicable to the hidden matrix of this other signal.If it's not true, this device just finishes to create the process of information hiding matrix.
Consult Figure 13, the figure shows the process of the hidden matrix of figure signal, its process comprises first step 130, and wherein, this device is initialised to a series of pointers the initial position in each submatrix of the hidden matrix of signal.After this, this device is created the hidden matrix of two-dimensional signal and pointer is initialized as its initial position in step 132.Like this, the position that can point out in the bidimensional matrix is corresponding to the same position in each submatrix of the hidden matrix of three dimensional signal.
This device is determined the maximum of relevant position in the submatrix of the hidden matrix of three dimensional signal in step 134, thereby just determines that according to various concealing technologies the maximum possible of the intensity of specific pixel changes (that is, increase or reduce).In step 136, this maximum change value is stored in the relevant position in the hidden matrix of two-dimensional signal.
Whether this device determines to have in the hidden matrix of two peacekeeping three dimensional signals other relevant position to exist at determination point 138 then.If any, then, advance to next position in step 140, and return step 134 with three-dimensional and the relevant pointer of the hidden matrix of two-dimensional signal.If no, this device is with regard to the process of the hidden matrix of transform ends signal.
Consult Figure 14, the figure shows the process that produces restriction matrix.This process at first comprises step 150, and wherein, this device is created and is applicable to specific limited technology limitation submatrix.After this, this device is estimated the numerical value of the frame of vision signal 18 according to the specific limited technology in step 152.In step 154, this device will adopt records of values that restriction technologies obtains on the restriction site corresponding to the siding stopping matrix of pixel.In case after finishing, this device is among step 156 adds the siding stopping matrix three-dimensional restriction matrix.
At determination point 158, device determines whether the restriction technologies that are used for the frame of vision signal 18 more.If any, device just turns back to step 150 to create other siding stopping matrix.If no, device just finishes to create the process of restriction matrix.
Consult Figure 15, the figure shows the process of conversion restriction matrix.This process at first comprises step 160, and wherein, this device is initialised to a series of pointers the initial position in each submatrix that limits hidden matrix.After this, this device is created a bidimensional restriction matrix and pointer is initialized as corresponding initial position in step 162.So indicated position is just corresponding to the same position of each submatrix of three-dimensional restriction matrix in the bidimensional matrix.
Device is the minimum value between the correspondence position in the submatrix of the definite three-dimensional restriction matrix of step 164.So just can determine to be added to the maximum of the intensity on the pixel according to restriction technologies.In step 166, this maximum value can be stored in the relevant position of bidimensional restriction matrix.
Device determines whether to also have other corresponding position in bidimensional and three-dimensional restriction matrix at determination point 168.If any, relevant with the submatrix of three-dimensional restriction matrix and bidimensional restriction matrix pointer just enters the next position and turns back to step 164 in step 170.If it's not true, device is with regard to the process of transform ends restriction matrix.
Consult Figure 16, the figure shows the process that forms the actual coding numerical matrix.This process at first comprises step 180, and wherein, this device has been created actual coded number value matrix and a plurality of pointers are initialised to initial position in the hidden matrix of two-dimensional signal, bidimensional restriction matrix and the actual coding numerical matrix.After this, whether this device has surpassed numerical value in restriction matrix pointed maximum with signal blinded value and the numerical value that restriction numerical value compares to determine the signal hiding matrix in step 182 in the relevant position of hidden matrix of signal and restriction matrix.
If device determines that at determination point 184 the signal blinded value is not more than limits value, device just copies to the signal blinded value in the relevant position of actual coding numerical matrix in step 186 so, and this sampling device has just been determined the signal blinded value and has been no more than limits value.
If device determines that at determination point 184 the signal blinded value is more than or equal to limits value, then install and limits value is copied in the relevant position of actual coding numerical matrix in step 188, thus, device just can determine that the signal blinded value has surpassed maximum, therefore must be reduced to the maximum value.
After step 186 or 188 was inserted the actual coding numerical matrix, whether device also had more multiposition among determination point 190 is determined signal hiding matrix, restriction matrix and actual coding matrix.If any, device just enters step 192, and wherein at the signal hiding matrix, the pointer in restriction matrix and the actual coding numerical matrix is advanced to the next position.After this, device turns back to step 182 all values is compared.If there is not other position in matrix, device just finishes to create the process of actual coding numerical matrix
Consult Figure 17, the figure shows the direction of carrier signal is added to process on the numerical value amplitude in the actual coding numerical matrix, this process comprises step 200, and wherein, encoder 12 points to the initial position of actual coding numerical matrixs.After this, encoder 12 in step 202, obtain carrier signal 20 and with actual coding numerical matrix current location on the relevant directional information of numerical value of carrier signal 20.The directional information that is appreciated that scan line and relative pixel is being specified in the step 82 as mentioned above by encoder 12.
Encoder 12 determines that at determination point 204 direction of carrier signals 20 is upwards or downwards, so that increase (promptly " make progress ") or reduction (i.e. " downwards ") pixel intensity about video scan lines by encoder 12.If direction is upwards, then encoder 12 does not change current numerical value in the actual coding numerical matrix in step 206; If direction is that then encoder 12 will replace with its negative value by locational numerical value in step 208 in the actual coding numerical matrix downwards.
Encoder 12 is after the numerical value that step 206 or 208 treatment of selected are selected, and encoder 12 just enters determination point 210 to determine whether also have more position to be analyzed at the direction of carrier signal in the actual coding numerical matrix.If any, encoder 12 advances to the pointer of actual coding numerical matrix next position and turns back to step 202 in step 212.If no, encoder 12 just finishes to apply the process of carrier signal.
Get back to Fig. 5, when the actual coding numerical matrix was finished at last after step 114, encoder 12 was combined into a frame video signal 18 in step 86 with actual coding numerical matrix and carrier signal 20.After this, encoder 12 produces modulating video signal 22 in step 89 from vision signal 18, and it can adopt carrier signal 20 to be optimized modulation and prepare and transmit or release.
The present invention has thought over the various and multiple technology about hidden signal that the present invention uses, and various technology all can produce submatrix separately, and it is added on the hidden matrix of three dimensional signal.
Consult Figure 18, the figure shows first example of the signal concealing technology that hereinafter is referred to as to become " edge enhancing technique ".Device at first is initialised to a pointer first scan line in the frame of vision signal 18 in step 400.After this, device is initialised to first pixel in the current scan line in step 402 with a pointer.After being provided with suitable pointer, device is from left to right measured the intensity of the two adjacent pixels that begin from current pixel in step 404 by the videoscanning on the scan line in the frame, this neighbor be referred to as hereinafter pixel 1 and 2 and with its place scan line on location independent.
Device determines at determination point 406 whether this current scan line reaches the standard grade, as above description.If current scan line is reach the standard grade, device just advances to intensity that determination point 408 determines pixels 1 whether greater than the intensity of pixel 2.If, device is just determined to exist sharp edges (promptly in vision signal 18, compare with the neighbor in the same frame of vision signal 18), and write down the ability of modulation by storage in the hidden submatrix of signal for a high value of pixel 1 than the hard intensity amount at step 410 device.If not, then install the normal hidden numerical value of in the hidden submatrix of signal, storing with respect to pixel 1 in step 412.
After having write down the hidden numerical value of the signal that is applicable to pixel 1, device determines that in step 414 whether the intensity of pixel 2 is greater than next pixel (being pixel 3).If then install in step 416 being recorded in the hidden submatrix of signal for the intensity level that has increased of pixel 2 and the identical numerical value of all other pixels records on for current scan line.Otherwise,, install so in step 418 and regime values be recorded in the submatrix position of pixel 2 if pixel 2 is not more than pixel 3.
If device determines that in step 410 current scan line is not reach the standard grade (promptly rolling off the production line), device enters into determination point 420 and determines whether the intensity of pixel 1 is lower than the intensity of pixel 2 so.If intensity is lower, device is just determined to have sharp edges in vision signal 18, and writes down modulation one ability than the hard intensity amount at step 442 device by storing a high value with respect to pixel 1 at the hidden submatrix of signal.If no, then install step 424 with respect to the normal hidden value storage of pixel 1 in the hidden submatrix of signal.
After completing steps 422 or step 424, device enters whether determination point 426 is lower than pixel 3 with the intensity of determining pixel 2 intensity.If intensity is less, at this device of step 416 intensity level that has increased for pixel 2 is recorded in the hidden submatrix of signal so, and for all other the identical value of pixel record on current scan line.Otherwise device writes down regime values in step 428 is being applicable to the submatrix position of pixel 2.
Then, device determines whether to also have other pixel on current scan line at determination point 430.If any, device enters step 432, wherein current pixel 3 is arranged to pixel 1.After this, device turns back to step 404 with the pixel on the scan line of further processing vision signal 18.
If determine do not have pixel to leave at determination point 430 on the current scan line of vision signal 18, device just enters into determination point 434 to determine whether having other scan line to handle at the frame of vision signal 18.If any, device just enters step 436, and wherein, pointer advances to the next line in the hidden submatrix of signal of next bar scan line in the representative frame.If no, then the process of edge coding just comes to an end.
Another kind of signal concealing technology of the present invention utilize brightness in time motion or spatial variations (calling " spatial variations " in the following text) as determining that how much intensity can be added to each pixel on the scan line of vision signal 18 or the factor of therefrom removing.Device is checked same pixel on the multi-frame video signal 18 determining whether existing big spatial variations, thereby has the edge on the interim direction.If such variation is arranged, during the motion concealing technology, device is the suitable numerical value of record in the hidden submatrix of signal just, can be added in the pixel of vision signal 18 each frame for all pixels in the frame with reflection or the intensive quantity of removal therefrom.
Another concealing technology of the present invention is brightness concealing technology (calling " brightness degree " in the following text).Adopt this technology, device all the more can change the dark more hidden submatrix of signal that is defined as that then changes fewly more of intensity pixel intensity based on the bright more device of pixel intensity and produce hidden numerical value.For instance, when brightness degree was low, the numerical value of the record of device in the hidden submatrix of signal can be 3, and brightness degree is when higher, and the value that is write down can be 1.Preferably be linear in brightness and intensity and the relation between the numerical value in the hidden submatrix of signal of being recorded in, but also can proofread and correct by γ as required.
The present invention preferably uses edge coding, and spatial variations and brightness degree are as concealing technology of the present invention.Yet be understandable that comprise that other technology of colourity also can be used as concealing technology, it also all within the scope of the present invention.The present invention also can use one or more restriction technologies.In preferred embodiment, encoder 12 has used a brightness limit technology.
Now see also Figure 19, the figure shows the brightness limit technology.It at first comprises step 500, and wherein, device is realized the brightness limit technology by a pointer being initialised to the row of first in the siding stopping matrix.After this install in step 502 first position of current line in the pointed siding stopping matrix.
Device is the brightness from measuring pixel corresponding to the vision signal 18 of current location the siding stopping matrix in the 503rd step.After this, device determines whether that pixel is too dark and can't gain in strength at determination point 504.If, device just enters into step 506, and numerical value of record installs 12 maximums that can change to indicate the intensity for current pixel in the vision signal 18 in the siding stopping matrix.If no, then device enters into step 508 with in maximum of siding stopping matrix record, does not have maximum to indicate corresponding pixel.
Device determines whether to also have other position on the current line of siding stopping matrix in step 510.If any, device enters into step 512, and wherein, device enters the next position in this row to pointer, turns back to determination point 504 then.If no, device just enters judgement fixed point 514, to determine whether also have more multi-scan-line in the siding stopping matrix.If have, device enters step 516 so that pointer is entered next line, and then enters step 502.If no, device just finishes the brightness limit technology.
Except above-mentioned brightness limit technology, other restriction technologies also all within the scope of the present invention and can be developed based on the observation of the modulation effect of vision signal 18.
See also Figure 20 now, the figure shows the better detecting method.At step 600 place, at first comprise detector 13 S meter zero setting, this indicating device is accumulated at line in the series of fields to the net result of the difference of line and preferably can access in memory 40 zones in certain time interval.In addition, at step 600 place, vision signal 18 when the front court be first.
Detector 13 at step 602 place vision signal 18 among the front court reads signal matrix in the memory 40, wherein, signal matrix has the locations of pixels corresponding to a vision signal 18, and preferably according to from left to right, pixel order ordering from top to down.
After the step 602 that is through with, detector 13 places current pointer in step 604 first row of signal matrix.After this, detector 13 is arranged at current pointer the same position of next line in the signal matrix then in the position that step 606 is disposed at current pointer to previous pointer.
Detector 13 obtains a difference in step 610 by the numerical value that deducts previous pointer indicating position from the indicated position numerical value of current pointer.Verify at step 612 place whether this difference is suitable numerical value, and this value is dropped if this difference overruns, and detector 13 enters step 616.If exist fairly obvious contrast between the intensity of neighbor, such as the black and then white pixel of pixel, then difference just may overrun.If difference is in scope, then detector 13 just is added to the difference between two pixels on the line accumulator in step 614.
Detector 13 determines at determination point 616 whether the current line of signal matrix is finished.If do not finish, detector 13 enters into step 615 will increase progressively their each the next positions of going of current pointer and previous pointed and to return step 610.If (promptly this row is finished), then the absolute value of line accumulative total can add up in step 618 and show up on the accumulator.
Whether detector 13 is determined to have in addition in signal matrix on other row at determination point 620.If have, then detector 13 is at step 622 replacement line accumulator and return step 606.If no, detector 13 determines that all each row all are read and enter into subsequently determination point 624 in signal matrix.
Detector 13 determines that at determination point 624 whether the field just analyzed is first an of frame video signal 18.If this field is not first (that is, if second), detector 13 just deducts this aggregate-value from signal strength signal intensity accumulative total in step 630.If this is first, detector 13 just is added to this aggregate-value on the signal strength signal intensity accumulator in step 626.By additional first modulated Field and deduct second non-modulation, just will be removed by the natural frequency that image produced of vision signal 18, because this second is not changed and does not comprise carrier signal 22.
Detector 13 determines at determination point 628 whether the time interval of its observation series of fields is overtime.If also do not have overtimely, detector 13 just enters into next vision signal 18 in step 632, and after this detector 13 turns back to step 602 to analyze next vision signal 18.
If all finish (overtime as the time period) in the 628 whole time intervals of determination point, then detector 13 just determines that at determination point 640 whether the intensity of signal is greater than detection threshold.If signal strength signal intensity is not more than threshold value, then in vision signal 18, just do not have carrier signal 22, and received signal device 24 does not exist at signal of step 642 reception.If signal strength signal intensity is greater than threshold value, then the device 24 of received signal receives a signal existence in step 644.
Consult Figure 21, the figure shows of the present invention first and replace coding/decoding method.This method at first comprises step 710, and wherein detector 13 obtains the pixel intensity of a vision signal 18, and a brightness value relevant with each pixel is stored in the memory with the scan line order in signal matrix.In addition, detector 13 at step 710 initialization line accumulator to be accumulated at the difference between the respective pixel on the adjacent scanning lines.
Detector 13 in step 712 in the current location pointed signal matrix second the row primary importance.Subsequently, detector 13 calculates a difference at the numerical value that the numerical value of step 714 by delegation relevant position above current location pointer signal matrix deducts at the current location pointer, thereby determines intensity poor between the two positions.
Detector 13 determines at determination point 716 places whether the previous difference of calculating is lower than threshold value and whether belongs to suitable numerical value to check this difference.If difference because the intensity of neighbor has very big contrast outside scope promptly, such as then being black pixel at white pixel, then this difference is abandoned and need not, and detector 13 enters determination point 720.If difference is within scope, then among step 718 is added to difference line accumulative total.
Detector 13 determines at determination point 720 whether the current location pointer has reached the end of current line in the signal matrix.If also have numerical value to be read, then detector enters the primary importance of signal matrix next line to the current location pointer and turns back to step 714 subsequently in step 722.
If at determination point 720, the analysis of the row of signal matrix to be finished, detector 13 just enters determination point 724 to determine that the line accumulator is whether within scope (by hereinafter definition).If the line accumulator is not within scope, detector 13 is just abandoned this line accumulator, if the line accumulator is within scope, detector 13 is just counted in step 726 incremental range interior lines.After this, detector 13 determines at determination point 728 whether this finishes.If do not finish, then detector enters next line in the signal matrix in step 730.If finish, detector 13 enters into determination point 732.
Detector 13 has determined whether to consider all row in the signal matrix in step 728.If also do not have, detector 13 just enters into step 730, and wherein it moves to next line in the signal matrix to current pointer.Finish if represent this signal matrix, then detector 13 is determined threshold value in scope interior lines counting is whether greater than scope at determination point 732.Therefore, detector 13 is attempted to determine at determination point 732 whether the amplitude to the difference of line is the exemplary value of modulating video signal 22 or vision signal 18 in the scope interior lines.If scope interior lines counting is not more than threshold value, then detector 13 should not exist by acknowledge(ment) signal at the device 24 of step 735 indication received signal.After this, detector 13 determines whether other existence in addition at determination point 736.If have, detector 13 returns step 710, if do not have, decode procedure is just accused and finished.
Be appreciated that aforementioned coding/decoding method can change, promptly signal does not exist with signal and exists the investigation (that is, in a time interval) that is not based on many vision signals 18 based on to be provided.Therefore, not that carrier wave existence or the carrier wave that provides in step 736 and step 736 do not exist, but detector 13 receives the field with modulated signal 22 and has the indication of the field of vision signal 18, and whether surpasses threshold value at the number of after this determining to have the field of modulated signal 22 at determination point.If surpass, then detector 13 exists for this time interval regenerated carrier signal, if do not surpass, detector 13 does not just exist for this time interval regenerated carrier signal.
Consult Figure 22, the figure shows with comparator and come method in the generation scope.At step 800 place, at first comprise with comparator and gather the difference of the line of the vision signal 22 of being modulated in the certain time interval, as mentioned above to line.Preferably, this comparator has the technology of detector 13, different is, and it can differently handle and keep each signal to think to analyze vision signal 18 necessary function is provided with detector 13, thereby determines to detect in the modulated vision signal 22 and the optimization zone of the difference between the encoded video signal 18 not.In addition, the time interval that this comparator is gathered its data preferably is at least 5 to 10 minutes, and also can grow as required many so that increase precision and gather more data.
Comparator is gathered the difference of modulated vision signal 22 lines to line at a certain time interval in step 802.Preferably step 800 and time interval of 802 are about equally.After this, in step 804, comparator produces the frequency curve chart 700 of the image data of modulated vision signal 22 and unmodulated vision signal 18, as shown in figure 23.After this operator 16 of comparator determines that the zone of curve (for example, as shown in figure 23), is wherein existing wide region difference between modulating video 22 and unmodulated vision signal 18.
In step 808, operator 16 is identified for detecting the optimization zone of difference between modulating video signal 22 and unmodulated vision signal 18, and this scope is referred to as in the scope 96, as shown in figure 24.
In yet another embodiment, to compare with the number of the field of during the time interval, considering by the number with field of difference in the sufficient amount scope of previous described arbitrary alternative embodiment, occupy certain percentage or whole if in this time interval, have the field of sufficient amount, then detector was thought exist carrier wave in this time interval, because the amplitude of difference is enough in the scope.
Consult Figure 25, the figure shows the another method of detected carrier.This method at first comprises step 750, and wherein, detector 13 obtains and read first vision signal 18.After this, this detector 13 determination point 752 determine when the front court whether be second of vision signal 18 present frames.If not, detector 13 just also then enters into determination point 762 at the energy that step 754 is calculated and storage is encoded by the hidden optimization method of above-mentioned signal.If then whether detector 13 just compares first optimization coding region and second same area to determine this frame video signal 18 encoded in step 756.
Behind completing steps 756, detector 13 determines at determination point 758 whether these frames are to encode, if, detector 13 is accumulated at this coding energy in coded fields and enter determination point 762.If not, detector 13 just directly enters determination point 762.
In step 762, whether detector 13 just determines to also have in this time interval other field to consider.If detector 13 enters into next field of vision signal 18 in step 764, and turns back to determination point 752.If no, then detector 13 enters into determination point 766.
If should finish in the time interval at determination point 762, detector 13 just determines whether that at determination point 766 numerical value of coded fields is greater than detection threshold.If the numerical value of coded fields is not more than threshold value, in vision signal 18, just do not have carrier signal 22 so, and received signal device 24 does not just exist in step 770 received signal.If signal strength signal intensity is bigger, then signal receiving device just exists in step 768 received signal.
Now see also Figure 26, the figure shows and be used for detecting the system unit of the line of scan line to the difference of line.This system unit at first comprises broadcast source 14, is used to transmit modulated vision signal 22 to detection/decoder box 28.As described below, detection/decoder box 28 determine lines to the difference of line and preferably the scan line by balanced modulated vision signal 22 pixel intensity and from modulated vision signal 22, remove carrier signal 20.After this, detection/decoder box 28 offers external device (ED) 19 with uncoded vision signal 18 under the user's of detection/decoder box 28 instruction.Perhaps, detection/decoder box 28 can not exported uncoded vision signal 18, but under the user's of detection/decoder box 28 instruction in conjunction with data output and/or other data to one device of conveyer line, with in order from modulation signal 22, to remove carrier signal 20 to the difference of line.So detection/decoder box 28 can be different from mode of the present invention operates,, be unmodulated vision signal 18 as it but attempt utilizes modulating video signal 22 as long as it is not that the attempt acknowledge(ment) signal exists or signal does not exist.
Consult Figure 27, when signal 22 was simulation, detection/decoder box 28 can be imported 32 by analog video and receive modulated vision signal 22, and when signal is numeral, then can imports 30 by digital video and receive modulated vision signal 22.Digital video input 30 directly is input to frequency detecting 90 to modulated vision signal 22, and simulation is imported 32 frequently and then used 34 pairs of modulating video signals of analog to digital converter 22 to carry out digitlization before modulated vision signal 22 incoming frequencies are detected 90 earlier.
One or more frequencies that frequency detecting 90 detects in the modulated vision signal 22, these frequencies are owing to produce at vision signal 18 modulated carrier signals 20.Optional system restoration circuit 92 increases respectively or deducts that each pixel of reaching the standard grade or rolling off the production line for modulated vision signal 22 increases or the voltage that deducts anti-phase, to offset existing of carrier signal 20 in modulated vision signal 22.Perhaps, detection/decoder box 28 may further include and is used for providing the data output 47 of line to the difference of line to external device (ED) 19.
The unmodulated vision signal 18 that is produced is sent from system restoration device 92 by digital video output 44 with digital form then, perhaps by adopting digital signal that digital to analog converter 46 conversions are produced and sending and by the unmodulated vision signal 18 of analog signal output 48 outputs with analog form.Should be noted that the unmodulated vision signal 18 of this generation may be (for example, the height of quality) inequality with original vision signal 18, but should be roughly the same by the unmodulated vision signal 18 shown programs that produced.
Consult Figure 28, this illustrates of the present invention first around method, and it comprises first step 800, and wherein, one reads vision signal 18 around device from broadcast source 14, and with pointer initialization first in vision signal 18.After this, this handles the front court of working as of vision signal 18 in step 802 around device.
Should determine as front court first of this frame video signal 18 whether in step 804 around device.If first, just do not change vision signal 18 around device, and enter determination point 810 in step 806.If not, then should just enter into determination point 810 then around device in the noise level of 18 second of step 808 lifting vision signals.
Should determine in vision signal 18 whether to also have other field in step 810 around device, and, then advance to next of vision signal 18 and turn back to step 802 in step 812 around device if having.If no, then finish by promoting the of the present invention of noise level around process.
Consult Figure 29, the figure shows of the present invention second around method.This method comprises first step 820, wherein, should read vision signal 18 around device, and pointer is initialised to first frame of vision signal 18.After this, in step 822, should be around the present frame of device stored video signal 18.Then around the present frame of device around Z axle rotating video signal 18.
Determine in vision signal 18, whether to also have other frame around device in step 826.If any, just advance to the next frame of vision signal 18 around device, and turn back to step 822 in step 828.If no, then finish the of the present invention of frame by promoting the rotating video signal around processing procedure.
In the alternative embodiment of above-mentioned processing method, only rotation is confirmed as adopting the frame of carrier signal 20 modulation.
Should understand from the above, though above specific embodiments of the invention are described, but within the scope of spirit of the present invention, can also locate various variations and change, therefore it is described that the present invention is not limited to this specification, and scope of the present invention is limited by appending claims of the present invention only.

Claims (42)

  1. One kind in vision signal the coding carrier signal method, described vision signal has a frame or multiframe, each frame all has first and second, first and second of described each frame all has the multi-strip scanning line, described each scan line all has a plurality of pixels and described each pixel all has the strength values of expression brightness, and described method is characterised in that:
    First multi-strip scanning line indicating a described frame or multiframe selectively is for reaching the standard grade or rolling off the production line:
    Calculating is optimized regulated quantity to the described pixel of reaching the standard grade and rolling off the production line; And
    Increase the strength values of the pixel of reaching the standard grade selectively and reduce the described optimization regulated quantity of strength values of pixel that rolls off the production line, thereby modulate described vision signal and produce modulated vision signal with carrier signal.
  2. 2. the method for claim 1 is characterized in that, also is included in encoder obtains described vision signal from signal source step.
  3. 3. method as claimed in claim 2, its feature also be, also comprises from the operator of described encoder obtaining step about the instruction of modulating described vision signal.
  4. 4. method as claimed in claim 2 is characterized in that, also comprises step from described encoder to broadcast source that export described modulated vision signal from.
  5. 5. the method for claim 1 is characterized in that, uses multiple signal concealing technology to carry out described step to the pixel calculation optimization regulated quantity of reaching the standard grade and rolling off the production line.
  6. 6. step as claimed in claim 1 is characterized in that, uses one or more signal concealing technologies and one or more restriction technologies to carry out step to the pixel calculation optimization regulated quantity of reaching the standard grade and rolling off the production line.
  7. 7. the method for claim 1 is characterized in that, carries out described first the multi-strip scanning line that indicates frame selectively with irregular structure and carries out step for reaching the standard grade or rolling off the production line.
  8. 8. the method for claim 1 is characterized in that, described step to the pixel calculation optimization regulated quantity of reaching the standard grade and rolling off the production line comprises:
    Produce the hidden matrix of three dimensional signal;
    The hidden matrixing of described three-dimensional is become the hidden matrix of two-dimensional signal, the hidden matrix of described two-dimensional signal has a plurality of signal concealed locations, described signal concealed location is corresponding to a plurality of pixels of described vision signal, each signal concealed location all has the hidden numerical value of signal, is used to represent to be added to first pixel or the intensity maximum from wherein deducting corresponding to the signal concealed location;
    Produce the three dimensional signal restriction matrix;
    Described three dimensional signal restriction matrix is transformed into the two-dimensional signal restriction matrix, described bidimensional restriction matrix has a plurality of signal limitations position, described signal limitations position is corresponding to a plurality of pixels of described vision signal, each signal limitations position all has the signal limitations value, is used to represent to be added to corresponding on first pixel of signal concealed location or the intensive quantity maximum from wherein deducting; And,
    The described maximum of the signal limitations numerical value by being subject to described signal limitations matrix selects the hidden numerical value of the signal of the hidden matrix of described signal to produce the actual coding numerical matrix.
  9. 9. method to the hidden optimization of frame signal calculated of vision signal, described frame has first and second, first and second of described frame has the multi-strip scanning line respectively, and described each bar scan line all has a plurality of pixels, and described method is characterised in that:
    Produce the hidden matrix of three dimensional signal;
    The hidden matrixing of described three dimensional signal is become the hidden matrix of two-dimensional signal, the hidden matrix of described two-dimensional signal has a plurality of signal concealed locations, and described signal concealed location is corresponding to a plurality of pixels of described vision signal, and each signal concealed location all has the hidden numerical value of signal, is used to represent to be added to corresponding on first the pixel of signal concealed location or the intensity maximum from wherein deducting.
    Produce the three dimensional signal restriction matrix;
    Described three dimensional signal restriction matrix is converted to the two-dimensional signal restriction matrix, described bidimensional restriction matrix has a plurality of signal limitations position, described signal limitations position is corresponding to a plurality of pixels of described vision signal, and each signal limitations position all has signal limitations numerical value, is used to represent to be added to corresponding on first the pixel of signal concealed location or from the maximum of the intensive quantity that wherein deducts; And,
    The described maximum of the signal limitations numerical value by being subject to described signal limitations matrix selects the hidden numerical value of the signal of the hidden matrix of signal to produce the actual coding numerical matrix.
  10. 10. method as claimed in claim 9 is characterized in that, describedly becomes the hidden matrixing of described three dimensional signal the step of the hidden matrix of two-dimensional signal to comprise:
    Produce the hidden matrix of two-dimensional signal;
    Determine maximum in a plurality of corresponding concealed location in the hidden matrix of described three dimensional signal; And,
    Described maximum is stored in the hidden matrix of described two-dimensional signal.
  11. 11. method as claimed in claim 9 is characterized in that, the described step that described three-dimensional restriction matrix is transformed into the two-dimensional signal restriction matrix comprises:
    Produce the two-dimensional signal restriction matrix;
    Determine maximum in a plurality of corresponding restriction site in described three dimensional signal restriction matrix; And,
    Described maximum is stored in the described two-dimensional signal restriction matrix.
  12. 12. method as claimed in claim 9 is characterized in that, also comprises the step of regulating the actual coding numerical matrix with the numerical value of baseline.
  13. 13. method as claimed in claim 9 is characterized in that, also comprises the direction of described carrier signal is put on the numerical value amplitude in the described actual coding numerical matrix.
  14. 14. method as claimed in claim 9 is characterized in that, the step of the hidden matrix of the described three dimensional signal of described generation comprises:
    Produce the hidden submatrix of signal separately for one or more signal concealing technologies, the hidden submatrix of described signal has a plurality of signal concealed locations corresponding to first pixel of vision signal separately;
    The pixel of estimating first according to described one or more signal concealing technologies is to produce the hidden numerical value of a plurality of signals;
    The a plurality of signal concealed locations of the hidden records of values of a plurality of signals that is obtained by described one or more signal concealing technologies at the hidden submatrix of described signal; And,
    The hidden submatrix of described signal is added on the hidden matrix of three dimensional signal.
  15. 15. method as claimed in claim 14 is characterized in that, described one or more signal concealing technologies are multiple signal concealing technologies.
  16. 16. method as claimed in claim 9 is characterized in that, the step of described generation three dimensional signal restriction matrix is characterised in that:
    Produce the signal limitations submatrix separately for one or more restriction technologies, described each signal limitations submatrix all has a plurality of signal limitations position corresponding to first pixel of vision signal;
    Estimate the pixel of described field according to described one or more restriction technologies;
    Will be in a plurality of signal limitations position of the submatrix of respective pixel by a plurality of signal limitations records of values that described one or more restriction technologies obtained; And
    Described signal limitations submatrix is added in the three-dimensional restriction matrix.
  17. 17. a method that is used to calculate for the intensity maximal regulated amount of the pixel of a vision signal, described method is characterised in that:
    Generation is for multiple signal concealing technology submatrix separately, and described signal concealing technology is used to estimate the pixel of vision signal, and described each submatrix all has a plurality of positions corresponding to the pixel of this vision signal;
    Estimate described pixel according to described multiple signal concealing technology, to produce a plurality of numerical value;
    The a plurality of records of values that obtained by described multiple signal concealing technology in a plurality of positions of described submatrix; And,
    Described submatrix is added in the hidden matrix of three dimensional signal; And,
    The hidden matrixing of described three dimensional signal is become the hidden matrix of two-dimensional signal, the hidden matrix of described two-dimensional signal has a plurality of signal concealed locations corresponding to a plurality of pixels of vision signal, described each signal concealed location all has the hidden numerical value of signal, is used to represent to be added to corresponding on first the pixel of signal concealed location or from the maximum of the intensity that wherein deducts.
  18. 18. method as claimed in claim 17 is characterized in that, described a plurality of signal concealing technologies comprise edge coding, spatial variations and brightness degree.
  19. 19. the method for the maximum of the brightness regulation of a plurality of pixels that are used to calculate a vision signal, described method is characterised in that:
    Generation is for one or more restriction technologies submatrix separately, and described restriction technologies is used to estimate the pixel of vision signal, and described each submatrix all has a plurality of positions corresponding to the pixel of this vision signal;
    Estimate the pixel of described field according to described one or more restriction technologies;
    Will be in a plurality of positions of the submatrix of respective pixel by a plurality of records of values that described one or more restriction technologies obtained:
    Described submatrix is added in the three dimensional signal restriction matrix; And,
    Described three dimensional signal restriction matrix is transformed into the two-dimensional signal restriction matrix, described two-dimensional signal restriction matrix has a plurality of signal limitations position corresponding to a plurality of pixels of vision signal, described each signal limitations position all has signal limitations numerical value, and described signal limitations numerical value is used to represent to be added to corresponding on first the pixel of signal limitations position or from the maximum of the intensive quantity that wherein deducts.
  20. 20. method as claimed in claim 19 is characterized in that, described one or more restriction technologies are brightness limit.
  21. 21. the method for the existence of carrier signal in the frame of detection vision signal on a time interval, described each frame has first and second, described first and second of each frame has the multi-strip scanning line separately, described each bar scan line all has a plurality of pixels, and described method is characterised in that;
    On detector, obtain described vision signal from broadcast source;
    A plurality of pixels of described each frame of vision signal are stored in the signal matrix, and described signal matrix has and the corresponding delegation at least of one or more scan line, and described delegation or multirow have a plurality of positions corresponding to a plurality of pixels separately;
    Calculate the difference of a plurality of lines, and the difference of a plurality of lines to line is accumulated in the difference to line;
    The difference separately of a plurality of pixels is accumulated in the line accumulator;
    The described line accumulator of use is determined the existence of carrier signal or is not existed in a plurality of.
  22. 22. method as claimed in claim 21, it is characterized in that the difference of subsequent rows correspondence position and described difference is accumulated to carries out the step of a plurality of lines of calculating in the difference in each position of a plurality of positions by obtaining in the multirow each row and the multirow to the difference of line.
  23. 23. method as claimed in claim 21 is characterized in that, the described time interval is a plurality of.
  24. 24. method as claimed in claim 21 is characterized in that, the described time interval is based on the institute accumulated energy and gets scalable and count destination field.
  25. 25. method as claimed in claim 21, its feature are that also the described time interval is the amount of Millisecond definition.
  26. 26. method as claimed in claim 21 is characterized in that, described absolute value that uses described line accumulator to determine each row in the existence of carrier signal or the multirow that non-existent step comprises the line accumulator that adds up in the accumulator on the scene in a plurality of; In each frame, the field accumulator is being added to the signal strength signal intensity accumulator that is used for first during the described time interval and deducting an accumulator from the signal strength signal intensity accumulator that is used for second, if and the signal strength signal intensity accumulator is less than or equal to detection threshold, then do not exist from described detector outgoing carrier, if perhaps signal strength signal intensity greater than detection threshold outgoing carrier exist.
  27. 27. method as claimed in claim 21 is characterized in that, it is further comprising the steps of: detector obtains vision signal from broadcast source; Signal matrix is read in each field of described vision signal; Calculate first and second optimization regulated quantity of described each frame of vision signal; If the numerical value of coded field is less than or equal to threshold value then does not exist from the detector outgoing carrier; If the numerical value of perhaps coded field then exists from the detector outgoing carrier greater than threshold value.
  28. 28. it is one or more that a method that is used for detecting the vision signal carrier signal, described vision signal have, described each all have the multi-strip scanning line, and have a plurality of pixels separately, described method is characterised in that:
    On detector, obtain described vision signal from broadcast source;
    The multi-strip scanning line of described vision signal is read in signal matrix, and described signal matrix has corresponding to the multirow of multi-strip scanning line and each provisional capital and has a plurality of positions corresponding to a plurality of pixels;
    Obtain a plurality of differences by the corresponding a plurality of positions that a plurality of positions on the multirow deducted separately this middle subsequent rows;
    Be lower than in a plurality of differences a plurality of row separately the difference of threshold value be added on the line accumulator;
    When the line accumulator is in the scope at a plurality of the time, increase progressively multirow scope interior lines counting separately; And
    If the counting of the line in the scope is less than or equal to the threshold value in the scope, then the detector outgoing carrier does not exist, if perhaps the interior line of scope is counted greater than the threshold value in the scope, then the detector outgoing carrier exists.
  29. 29. method that is used for detecting vision signal carrier signal in the time interval, described vision signal has a frame or multiframe, described each frame all has first and second, first and second of described each frame has the multi-strip scanning line and every scan line all has a plurality of pixels, and described method is characterised in that:
    On detector, obtain described vision signal from broadcast source;
    Each multi-strip scanning line of described vision signal is read in signal matrix;
    Calculating is for first and second optimization regulated quantity of described each frame of vision signal;
    The numerical value of coded fields of each frame of vision signal of having modulated adds up; And,
    If coded fields numerical value has been less than or equal to threshold value then the detector outgoing carrier does not exist, if perhaps encoded value greater than threshold value, then the detector outgoing carrier exists.
  30. 30. method as claimed in claim 29 is characterized in that, the step of described calculation optimization regulated quantity comprises:
    Produce the hidden matrix of three dimensional signal;
    With the hidden matrixing of described three dimensional signal is the hidden matrix of two-dimensional signal, the hidden matrix of described two-dimensional signal has a plurality of signal concealed locations corresponding to a plurality of pixels of vision signal, described each signal concealed location all has the hidden numerical value of signal, is used to represent to be added to corresponding to signal concealed location or the intensity maximum from wherein deducting;
    Produce the three dimensional signal restriction matrix,
    Described three dimensional signal restriction matrix is transformed to the two-dimensional signal restriction matrix, described two-dimensional signal restriction matrix has the signal limitations position corresponding to a plurality of pixels of vision signal, described each signal limitations position all has signal limitations numerical value, is used to represent to be added to corresponding to first pixel of signal concealed location or from the maximum of the intensive quantity that wherein deducts;
    The maximum of the signal limitations numerical value by being subject to the signal limitations matrix selects the hidden numerical value of signal of the hidden matrix of signal to produce the actual coding numerical matrix.
  31. 31. method that the carrier signal that is used for making the modulated vision signal is removed, described modulated vision signal has a frame or multiframe, and described each frame all has the multi-strip scanning line, and described each bar scan line all has a plurality of pixels, and described method is characterised in that:
    On checkout gear, obtain modulated vision signal from broadcast source, and,
    By remove existing carrier signal the modulated vision signal from the following step group selection:
    On checkout gear, determine a plurality of variations, by on the modulated vision signal, adding a plurality of pixels that oppositely change the modulated vision signal of a plurality of variations for a plurality of pixels of modulated vision signal;
    One frame of rotation modulated vision signal or each frame in the multiframe;
    Rotate the frame of modulated vision signal selectively, promote the noise level among frame of modulated vision signal or multiframe each second; And,
    Promote the noise level among second of each frame of modulated vision signal selectively.
  32. 32. device that is used to change the vision signal that receives from broadcast source, described vision signal has first and second, described first and second all has the multi-strip scanning line and each bar scan line all has a series of neighbors, and described device is characterised in that:
    Be used for receiving at least one signal input of modulated vision signal from broadcast source;
    With the frequency detecting of described at least one signal input electric coupling, be used for detecting a plurality of frequencies of modulated vision signal;
    With system's memory circuit of described frequency detection circuit electric coupling, be used for increasing respectively or deduct on a series of neighbors of the multi-strip scanning line that is added to modulated signal or anti-phase from its voltage that deducts.
  33. 33. device as claimed in claim 32 is characterized in that, also comprises data output.
  34. 34. device as claimed in claim 32 is characterized in that, also comprises at least one signal output.
  35. 35. a method that is used for the carrier signal modulating video signal, described vision signal has a frame or multiframe, and described each frame has the multi-strip scanning line and each bar scan line all has a plurality of pixels, and described method is characterised in that,
    The multi-strip scanning line of specifying in each frame at least one with irregular structure is as reaching the standard grade or rolling off the production line selectively; And,
    Increase the intensity of the pixel of reaching the standard grade and the intensity of the pixel that reduction is rolled off the production line selectively, thereby be formed on the carrier signal in the vision signal.
  36. 36. method as claimed in claim 35 is characterized in that, also is included in the step that obtains described vision signal on the encoder from signal source.
  37. 37. method as claimed in claim 35 is characterized in that, also comprises from encoder operation person obtaining step about the instruction of modulating described vision signal.
  38. 38. method as claimed in claim 35 is characterized in that, also comprises from encoder exporting the step of modulated vision signal to broadcast source.
  39. 39. method as claimed in claim 35 is characterized in that, also comprises the step of calculating for the optimization regulated quantity of the pixel of reaching the standard grade and rolling off the production line.
  40. 40. method as claimed in claim 39 is characterized in that, uses multiple signal concealing technology to carry out the step of the optimization regulated quantity of the pixel that described calculating reaches the standard grade and roll off the production line.
  41. 41. method as claimed in claim 39 is characterized in that, uses one or more signal concealing technologies and one or more restriction technologies to carry out described calculating reach the standard grade and the roll off the production line step of optimization regulated quantity of pixel.
  42. 42. method as claimed in claim 39 is characterized in that, the step of the optimization regulated quantity of the pixel that described calculating is reached the standard grade and rolled off the production line comprises:
    Produce the hidden matrix of three dimensional signal;
    The hidden matrixing of described three dimensional signal is become the hidden matrix of two-dimensional signal, the hidden matrix of described two-dimensional signal has corresponding to a plurality of signal concealed locations of a plurality of pixels of described vision signal and each described signal concealed location and all has the hidden numerical value of signal, is used to represent to be added to corresponding to first pixel of signal concealed location or from its intensity maximum that deducts;
    Produce the three dimensional signal restriction matrix;
    Described three dimensional signal restriction matrix is transformed into the two-dimensional signal restriction matrix, described two-dimensional signal restriction matrix has a plurality of signal limitations position corresponding to a plurality of pixels of described vision signal, and each described signal limitations position all has signal limitations numerical value, is used to represent to be added to corresponding to first pixel of signal concealed location or from the maximum of its intensive quantity that deducts; And,
    The described maximum of the signal limitations numerical value by being subject to described signal limitations matrix selects the hidden numerical value of signal of the hidden matrix of described signal to produce actual coded number value matrix.
CN 200480031483 2003-08-26 2004-08-26 Method and system for enhanced modulation of video signals Pending CN1871852A (en)

Applications Claiming Priority (5)

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US49803903P 2003-08-26 2003-08-26
US60/498,039 2003-08-26
US60/502,136 2003-09-10
US60/554,151 2004-03-18
US10/888,919 2004-07-09

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