CN104348761A - Signal coding and decoding method - Google Patents
Signal coding and decoding method Download PDFInfo
- Publication number
- CN104348761A CN104348761A CN201310327384.3A CN201310327384A CN104348761A CN 104348761 A CN104348761 A CN 104348761A CN 201310327384 A CN201310327384 A CN 201310327384A CN 104348761 A CN104348761 A CN 104348761A
- Authority
- CN
- China
- Prior art keywords
- brightness value
- gray scale
- scale image
- inner region
- frame picture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Each embodiment of the invention provides a signal coding and decoding method. The method comprises the following steps: receiving a flashing signal which comprises a binary code in the form of a gray scale image, wherein the binary code is a code based on the flashing time length and interval of flashing equipment; calculating the brightness value of an area in each frame of picture in the gray scale image of the received signal; and resolving corresponding information of the binary code based on the brightness value changes of the frames of the gray scale image. Through adoption of the method, message sharing can be performed without a mobile terminal or a short-distance communication way (such as Bluetooth and NFC (Near Field Communication)).
Description
Technical field
The embodiments of the present invention relate to field of information communication, and relate more specifically to the decoding method of signal.
Background technology
In recent years, along with the development of hardware device and the communication technology, the mobile device of such as smart mobile phone is day by day universal.Smart mobile phone (Smartphone), be similar to PC, there is independently operating system, by user's program of providing of the third party service provider such as mounting software, game voluntarily, and can be realized such function of wireless network access by mobile communication network.Current mobile device, is usually equipped with the equipment such as photoflash lamp, camera, touch-screen, especially for smart mobile phone, has the data processing and application service ability of becoming stronger day by day.
On the other hand, Morse code (Morse alphabet) is that American's Morse (Samuel Finley Breese Morse) was invented in 1837, is made up of a dot (.), stroke dash (-) two kinds of symbols.1, be some a baseband signal unit, the time span of length=3 of stroke.2, in a letter or number, each point, draw between interval should be the time span of 2.3, the time span being spaced apart at 7 between letter (numeral) and letter (numeral).Morse code is very important on radio in early days, and each radio communication person institute must must know.
Due to the progress of mechanics of communication, the application of Morse code reduces day by day.But the frequency range shared by it is minimum, there is the characteristic of a kind of technology and art simultaneously, how the mobile device of this kind of code with such as smart mobile phone is combined, become an interesting thing.
At present, market does not utilize this code between mobile device terminal, carry out the application of communication, its difficult point is reception and the process of the mobile device of signal.Therefore, the present invention is devoted to solve this technical barrier, thus the communication modes between the mobile device that a kind of novelty is provided, enrich the Consumer's Experience of mobile device.
Summary of the invention
Therefore, one object of the present invention is at least to provide a kind of novel communication modes, and it can when not sharing by carrying out message when mobile network or short haul connection mode (such as bluetooth, NFC etc.).Under suitable scene (such as night) also can carry out longer-distance transmission.The present invention compares the message being suitable for literal type and shares.Further, the application of a variety of mobile device can be derived based on the present invention, such as message is shared, the communication tool at night of outdoor exercises, social chat expansion software etc.
According to a first aspect of the invention, provide a kind of coding/decoding method of signal, it is characterized in that, comprising: with gray scale image form receiving package containing the flashing light of binary coding, wherein said binary coding is the coding at flash time length based on flash unit and interval; Calculate the brightness value of the every frame picture inner region in the gray scale image of received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
According to the further embodiment of the present invention, described flash unit comprises photoflash lamp or the screen of mobile device, and receives described flashing light by the camera of mobile device.
According to the further embodiment of the present invention, the average frame per second based on the camera receiving described flashing light arranges described flash time length and interval.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in picture receiving area.
According to the further embodiment of the present invention, the mechanism of described binary coding comprises Huffman encoding or Morse encoding mechanism.
According to a second aspect of the invention, provide a kind of decoding method of signal, it is characterized in that, comprising: based on flash time length and the interval of flash unit, binary coding is carried out to flashing light; With the flashing light of gray scale image form receiving package containing binary coding information; Calculate the brightness value of the every frame picture inner region in the gray scale image of received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
According to the further embodiment of the present invention, described flash unit comprises photoflash lamp or the screen of mobile device, and receives described flashing light by the camera of mobile device.
According to the further embodiment of the present invention, the average frame per second based on the camera receiving described flashing light arranges described flash time length and interval.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in picture receiving area.
According to the further embodiment of the present invention, the mechanism of described binary coding comprises Huffman encoding or Morse encoding mechanism.
According to a third aspect of the invention we, provide a kind of signal decoding system, comprising:
Camera, is configured to gray scale image form receiving package containing the flashing light of binary coding information, and wherein said binary coding is the coding at flash time length based on flash unit and interval; And
Processing unit, is arranged to the brightness value of the every frame picture inner region in the gray scale image calculating received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in picture receiving area.
According to a forth aspect of the invention, provide a kind of signal codec system, comprise signal modulator, be configured to flash time length and the interval of modulating flash unit, binary coding is carried out to flashing light; Camera, is configured to the flashing light of gray scale image form receiving package containing described binary coding information; And processing unit, be arranged to the brightness value of the every frame picture inner region in the gray scale image calculating received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
According to the further embodiment of the present invention, the brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in picture receiving area.
Accompanying drawing explanation
When reading the detailed description hereafter to exemplary embodiment by reference to the accompanying drawings, these and other object, feature and advantage will become apparent, in the accompanying drawings:
Fig. 1 shows the signal scene graph of the signal and communication according to mobile device of the present invention.；
Fig. 2 shows the flow chart of the coding/decoding method of signal according to an embodiment of the invention;
Fig. 3 shows the brightness waveform obtained according to one embodiment of present invention
Fig. 4 shows the schematic diagram that process stabilization according to an embodiment of the invention affects with distance; And
Fig. 5 shows the flow chart of the decoding method of signal according to an embodiment of the invention.
Embodiment
Flow chart in accompanying drawing and block diagram, illustrate according to the architectural framework in the cards of the device of various embodiments of the invention, method and computer program product, function and operation.In this, each square frame in flow chart or block diagram can represent a part for module, program segment or a code, and a part for described module, program segment or code comprises one or more executable instruction for realizing the logic function specified.Also it should be noted that at some as in the realization of replacing, the function marked in square frame also can be different from occurring in sequence of marking in accompanying drawing.Such as, in fact the square frame that two adjoining lands represent can perform substantially concurrently, and they also can perform by contrary order sometimes, and this determines according to involved function.Also it should be noted that, the combination of the square frame in each square frame in block diagram and/or flow chart and block diagram and/or flow chart, can realize by the special hardware based system of the function put rules into practice or operation, or can realize with the combination of specialized hardware and computer instruction.
Each execution mode of the application is described below in conjunction with accompanying drawing.
Fig. 1 shows the signal scene graph of the signal and communication according to mobile device of the present invention.Fig. 1 comprises the first mobile device 110 and the second mobile device 112.This first mobile device 110 at least possesses flash unit, such as photoflash lamp.This second mobile device 112 at least possesses camera.First and second mobile devices can be the mobile device based on various operating system, such as smart mobile phone.Various operating system such as includes but not limited to IOS, Android operation system, windows phone operating system etc.
In FIG, the first mobile device 110 controls flash unit and to flash signal, and such as this flashing light is controlled so as to glimmer with certain scintillation time interval and length, forms a kind of binary coding being similar to Morse code.Such as, use long sudden strain of a muscle and short sudden strain of a muscle as basic element, binary zero and 1 can be represented.Scintillation time interval and length can be determined based on the average frame per second of camera.Such as, for the camera that 30 frames are per second, then can set its minimum flash of light duration and should be 0.03 second, short sudden strain of a muscle, long to dodge and scintillation time interval can be all its certain multiple.Then the signaling set of 26 English alphabets, 0-9 numeral and part punctuation mark can be formed based on Huffman encoding mechanism, Morse encoding mechanism etc.For the coding of Chinese, then can encode with reference to Chinese commercial code, such as, use 4 bit digital to represent a Chinese character.Thus, user can according to setting encoding mechanism by the information coding of communication in flashing light.
The preferred photoflash lamp of the application launches encoded flashing light as flash unit, but in other embodiments, also the screen of such as touch-screen can be adopted as flash unit, and this is specially adapted to the signal and communication between two mobile devices in long distance and night situation.
Second mobile device 112 receives the flashing light of the first mobile device 110 transmission by camera.In order to receive flashing light exactly, the camera of the second mobile device 112 can be required to aim at flash of light source, and this can such as realize by checking camera preview to determine whether to aim at, and connects to form point-to-point communication.In order to accurately receive flashing light, two mobile devices adaptive signaling before formally setting up communication can also be required.Adaptive signaling is the signaling used for setting up communication between two mobile devices.Because use optical communication, under varying environment and scene, have interference, adaptive signaling object is for indicating transmission and the receive status of mobile device.Such as can use 1 second, intercycle and use 2 short sudden strains of a muscle, indication equipment is in state to be matched, and long sudden strain of a muscle in 2 seconds indicates and sends the complete state of message, and other states indicate signaling set.In addition, in order to the Obtaining Accurate of follow-up described brightness value, the Automatic white balance of locking second mobile device 112 can also be required.
Emphasis describes the decoding of the second mobile device to the above-mentioned encoded flashing light received below.
Fig. 2 shows the flow chart of the coding/decoding method of signal according to an embodiment of the invention.As shown in Figure 2, this coding/decoding method 200 is from step S210.
In step S220, with gray scale image form receiving package containing the flashing light of binary coding, wherein said binary coding is the coding at flash time length based on flash unit and interval.
Particularly, such as the second mobile device 112 uses the method for camera preview, allows hand-held second mobile device of user aim at the flash of light source of the first mobile device, forms point-to-point communication and connects.When receiving flashing light information, camera receives with the form of gray scale image.In addition, it is noted that at equipment signaling matching stage, the intensity reading flicker in a period of time can be selected to carry out dynamic calculation and to go out suitable luminance threshold, so that the follow-up process to brightness in gray scale image.
In step S230, calculate the brightness value of the every frame picture inner region in the gray scale image of received signal.
Due to when the second mobile device receives flashing light, camera can be opened with the pattern of video preview, and now, the flow data that camera receives is generally yuv format.Y in YUV refers to " gray scale " or " lightness ", and that " U " and " V " represents is then colourity (Chrominance or Chroma), and effect describes colors of image and saturation, is used to specify the color of pixel.Due to we calculate signal time, only need calculate its light intensity, therefore when extraction signal source, the signal data only needing to get Y-component in YUV can the calculation pass of .Y and RGB be: Y=0.2126R+0.7152G+0.0722B.That is, in YUV video form in each frame picture, Y-component records the concrete gray value of each pixel, namely we usually understand in brightness value.And in each frame YUV picture data, the data that Y-component keeps are that (W is the width of shooting picture for the front W*H position of this picture, H is height) data, obtain the Y-component data of the front W*H position in the every frame data of YUV thus, such as picture is 4*4 pixel, then before, 4*4 is Y-component data.
Because Y-component is the intensity signal that recite each pixel on picture, obtain Y-component data and be equivalent to the monochrome image information having intercepted picture.By the array of pixels information of W*H bit length got, for calculating the light intensity of picture.If get the brightness value of whole picture, so only the data of W*H need be added the total luminance value that just can obtain picture.The brightness value of each frame picture arranges out as an ordered series of numbers and just can obtain a brightness waveform as shown in Figure 3.
Fig. 3 shows the brightness waveform obtained according to one embodiment of present invention.Wherein abscissa represents the frame number of the flashing light image that the camera of the second mobile device obtains, and ordinate represents the brightness summation of every two field picture.
Step S240, the brightness value based on the frame of described gray scale image changes, and parses the information that described binary coding is corresponding.
In this step, noise reduction filtering process can be done to above-mentioned brightness waveform, and based on the clock interval preset, the flicker such as flicker of 0.03 second being read as more than 0,0.06 second is read as 1, the dark of length more than 0.1 second is as character pitch, then above-mentioned brightness waveform process can be obtained with the train of signal of 0,1 composition, as follows:
0110 00
Finally this 0,1 ordered series of numbers is put in default decoder, such as, just can obtains transmission information by built-in coding schedule.Such as, if use Morse code mechanism, above character representated by train of signal " 0,110 00 " be exactly " Pi ".
When real data process, the clock frequency of signal amounts to calculation camera frame per second and gets, such as camera frame per second is 30fps, and the time difference between so every frame is about 0.03 second.
Step S250, terminates.
In addition, in enforcement according in embodiments of the invention process, the size of the light intensity of the distance between understanding two mobile devices, flashing light or shake also may have an impact to the Signal reception of the second mobile device and process process by those skilled in the art, the wherein shake of such as user's hand, shining point can be made constantly to change in the position of picture, receive data and also can constantly change.
For size and the distance problem of light intensity, in fact can classify as same problem, such as distance is nearer, and light intensity is larger; Distance is far away, and light intensity is less.Therefore, as further preferably embodiment, the application introduces the method that simply processes stabilization and distance, i.e. setting screen receiving area (or focusing area), such as shown in Figure 4, this Fig. 4 shows the schematic diagram that process stabilization according to an embodiment of the invention affects with distance.
The benefit of such design is exactly, and flash of light source, when reception data, is put in border circular areas by user.And when data calculate, only calculate light intensity (or brightness value) summation in focusing area or picture receiving area.Like this, as long as light source does not leave border circular areas, the light intensity calculated is exactly effective, thus to some extent solves the data unsteadiness that float brings.On the other hand, focusing area or picture receiving area are set, when remote flash of light transmission, the light disturbance outside focusing area or picture receiving area can be got rid of, increase the validity of data.
Fig. 5 shows the flow chart of the decoding method 500 of signal according to an embodiment of the invention.Step in Fig. 5 flow chart is substantially the same with step in Fig. 2, and difference is only the step S520 adding coding: based on flash time length and the interval of flash unit, carry out binary coding to flashing light.This step is realized by the flash unit of the first mobile device or signal modulator.
As the equipment implementing above-described coding method 200, decode system disclosed in the present application can be configured to comprise:
Camera, is configured to gray scale image form receiving package containing the flashing light of binary coding information, and wherein said binary coding is the coding at flash time length based on flash unit and interval; And
Processing unit, is arranged to the brightness value of the every frame picture inner region in the gray scale image calculating received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
And as implementing the equipment of above-described decoding method 500, coding/decoding system disclosed in the present application can be configured to comprise:
Signal modulator, is configured to flash time length and the interval of modulating flash unit, carries out binary coding to flashing light;
Camera, is configured to the flashing light of gray scale image form receiving package containing described binary coding information; And
Processing unit, is arranged to the brightness value of the every frame picture inner region in the gray scale image calculating received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
Although the application is not further elaborated the operation of above-mentioned decode system and coding/decoding system, but it will be understood by those skilled in the art that and application decoder system and coding/decoding system can realize described in above-mentioned coding/decoding method and decoding method each function.
Therefore, visible by description above, the present invention utilizes existing mobile device to provide a kind of novel communication modes, and it can when not sharing by carrying out message when mobile network or short haul connection mode (such as bluetooth, NFC etc.).Under suitable scene (such as night) also can carry out longer-distance transmission.The present invention compares the message being suitable for literal type and shares.Further, the application of a variety of mobile device can be derived based on the present invention, such as message is shared, the communication tool at night of outdoor exercises, social chat expansion software etc.
Give specification of the present invention for the object illustrated and describe, but it is not intended to be exhaustive or be limited to the invention of disclosed form.It may occur to persons skilled in the art that a lot of amendment and variant.It will be appreciated by those skilled in the art that the method and apparatus in embodiment of the present invention can realize with software, hardware, firmware or its combination.
Therefore; execution mode is to principle of the present invention, practical application are described better and enable the other staff in those skilled in the art understand following content and select and describe; namely; under the prerequisite not departing from spirit of the present invention, all modifications made and replacement all will fall in the scope of claims definition.
Claims (18)
1. a coding/decoding method for signal, is characterized in that, comprising:
With gray scale image form receiving package containing the flashing light of binary coding, wherein said binary coding is the coding at flash time length based on flash unit and interval;
Calculate the brightness value of the every frame picture inner region in the gray scale image of received signal; And
Brightness value based on the frame of described gray scale image changes, and parses the information that described binary coding is corresponding.
2. method according to claim 1, wherein,
Described flash unit comprises photoflash lamp or the screen of mobile device, and receives described flashing light by the camera of mobile device.
3. method according to claim 2, wherein,
Average frame per second based on the camera receiving described flashing light arranges described flash time length and interval.
4. method according to claim 1, wherein,
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
5. method according to claim 1, wherein,
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in described picture receiving area.
6. method according to claim 1, wherein,
The mechanism of described binary coding comprises Huffman encoding or Morse encoding mechanism.
7. a decoding method for signal, is characterized in that, comprising:
Based on flash time length and the interval of flash unit, binary coding is carried out to flashing light;
With the flashing light of gray scale image form receiving package containing binary coding information;
Calculate the brightness value of the every frame picture inner region in the gray scale image of received signal; And
Brightness value based on the frame of described gray scale image changes, and parses the information that described binary coding is corresponding.
8. method according to claim 7, wherein,
Described flash unit comprises photoflash lamp or the screen of mobile device, and receives described flashing light by the camera of mobile device.
9. method according to claim 8, wherein,
Average frame per second based on the camera receiving described flashing light arranges described flash time length and interval.
10. method according to claim 7, wherein,
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
11. methods according to claim 7, wherein,
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in described picture receiving area.
12. methods according to claim 7, wherein,
The mechanism of described binary coding comprises Huffman encoding or Morse encoding mechanism.
13. 1 kinds of signal decoding systems, comprising:
Camera, is configured to gray scale image form receiving package containing the flashing light of binary coding information, and wherein said binary coding is the coding at flash time length based on flash unit and interval; And
Processing unit, is arranged to the brightness value of the every frame picture inner region in the gray scale image calculating received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
14. systems according to claim 13, wherein,
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
15. systems according to claim 13, wherein:
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in described picture receiving area.
16. 1 kinds of signal codec systems, comprise
Signal modulator, is configured to flash time length and the interval of modulating flash unit, carries out binary coding to flashing light;
Camera, is configured to the flashing light of gray scale image form receiving package containing described binary coding information; And
Processing unit, is arranged to the brightness value of the every frame picture inner region in the gray scale image calculating received signal; And change based on the brightness value of the frame of described gray scale image, parse the information that described binary coding is corresponding.
17. systems according to claim 16, wherein,
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises the brightness value sum of each pixel calculating described every frame picture inner region.
18. systems according to claim 16, wherein:
The brightness value of the every frame picture inner region in the gray scale image of described calculating received signal comprises setting screen receiving area, and calculates the brightness value of the every frame picture inner region in picture receiving area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310327384.3A CN104348761A (en) | 2013-07-30 | 2013-07-30 | Signal coding and decoding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310327384.3A CN104348761A (en) | 2013-07-30 | 2013-07-30 | Signal coding and decoding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104348761A true CN104348761A (en) | 2015-02-11 |
Family
ID=52503587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310327384.3A Pending CN104348761A (en) | 2013-07-30 | 2013-07-30 | Signal coding and decoding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104348761A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119636A (en) * | 2015-07-28 | 2015-12-02 | 深圳市文鼎创数据科技有限公司 | Information sending and receiving methods, and information sending and receiving apparatuses |
| CN105607037A (en) * | 2015-12-22 | 2016-05-25 | 镇江市高等专科学校 | Intelligent positioning system and information coding method |
| CN106453161A (en) * | 2016-11-03 | 2017-02-22 | 武汉斗鱼网络科技有限公司 | Method and device for transmitting and analyzing information |
| WO2017063298A1 (en) * | 2015-10-16 | 2017-04-20 | 宇龙计算机通信科技(深圳)有限公司 | Authentication method and terminal |
| US9984264B2 (en) | 2015-10-29 | 2018-05-29 | Industrial Technology Research Institute | Data transmission apparatus, data read apparatus, data encoding and decoding apparatus, and method thereof for patternized data |
| CN108768518A (en) * | 2018-05-23 | 2018-11-06 | 西安蜂语信息科技有限公司 | Information transferring method and device |
| CN109152092A (en) * | 2018-10-26 | 2019-01-04 | 梦孚（上海）教育科技有限公司 | A kind of device and method of shared WiFi password |
| CN110097355A (en) * | 2019-04-29 | 2019-08-06 | 北京意锐新创科技有限公司 | A kind of method of commerce distinguished based on image and the traction equipment using it |
| CN111275907A (en) * | 2020-01-20 | 2020-06-12 | 江苏恒宝智能***技术有限公司 | Multi-channel identification authentication method and multi-channel identification authentication terminal |
| CN113543405A (en) * | 2021-09-15 | 2021-10-22 | 广州中大中鸣科技有限公司 | Method and device for reconstructing inter-frame dynamic gray scale based on LED lamp display |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338826A (en) * | 2000-08-16 | 2002-03-06 | 国际商业机器公司 | System and method for communications between embeded equipments with visual images |
| CN102422573A (en) * | 2009-04-28 | 2012-04-18 | 西门子公司 | Method and apparatus for the optical transmission of data |
| US20120155889A1 (en) * | 2010-12-15 | 2012-06-21 | Electronics And Telecommunications Research Institute | Method and apparatus for transmitting and receiving data using visible light communication |
| CN102679200A (en) * | 2011-01-03 | 2012-09-19 | 昆山科技大学 | Lamp with communication function and equipment thereof |
| CN103098553A (en) * | 2010-09-14 | 2013-05-08 | 皇家飞利浦电子股份有限公司 | Coded light emitting device |
-
2013
- 2013-07-30 CN CN201310327384.3A patent/CN104348761A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338826A (en) * | 2000-08-16 | 2002-03-06 | 国际商业机器公司 | System and method for communications between embeded equipments with visual images |
| CN102422573A (en) * | 2009-04-28 | 2012-04-18 | 西门子公司 | Method and apparatus for the optical transmission of data |
| CN103098553A (en) * | 2010-09-14 | 2013-05-08 | 皇家飞利浦电子股份有限公司 | Coded light emitting device |
| US20120155889A1 (en) * | 2010-12-15 | 2012-06-21 | Electronics And Telecommunications Research Institute | Method and apparatus for transmitting and receiving data using visible light communication |
| CN102679200A (en) * | 2011-01-03 | 2012-09-19 | 昆山科技大学 | Lamp with communication function and equipment thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119636A (en) * | 2015-07-28 | 2015-12-02 | 深圳市文鼎创数据科技有限公司 | Information sending and receiving methods, and information sending and receiving apparatuses |
| WO2017016127A1 (en) * | 2015-07-28 | 2017-02-02 | 深圳市文鼎创数据科技有限公司 | Information sending and receiving method, and information sending and receiving apparatus |
| CN105119636B (en) * | 2015-07-28 | 2017-09-15 | 深圳市文鼎创数据科技有限公司 | Information sending, receiving method and information are sent, reception device |
| WO2017063298A1 (en) * | 2015-10-16 | 2017-04-20 | 宇龙计算机通信科技(深圳)有限公司 | Authentication method and terminal |
| US9984264B2 (en) | 2015-10-29 | 2018-05-29 | Industrial Technology Research Institute | Data transmission apparatus, data read apparatus, data encoding and decoding apparatus, and method thereof for patternized data |
| CN105607037A (en) * | 2015-12-22 | 2016-05-25 | 镇江市高等专科学校 | Intelligent positioning system and information coding method |
| CN106453161A (en) * | 2016-11-03 | 2017-02-22 | 武汉斗鱼网络科技有限公司 | Method and device for transmitting and analyzing information |
| CN108768518A (en) * | 2018-05-23 | 2018-11-06 | 西安蜂语信息科技有限公司 | Information transferring method and device |
| CN109152092A (en) * | 2018-10-26 | 2019-01-04 | 梦孚（上海）教育科技有限公司 | A kind of device and method of shared WiFi password |
| CN110097355A (en) * | 2019-04-29 | 2019-08-06 | 北京意锐新创科技有限公司 | A kind of method of commerce distinguished based on image and the traction equipment using it |
| CN111275907A (en) * | 2020-01-20 | 2020-06-12 | 江苏恒宝智能***技术有限公司 | Multi-channel identification authentication method and multi-channel identification authentication terminal |
| CN113543405A (en) * | 2021-09-15 | 2021-10-22 | 广州中大中鸣科技有限公司 | Method and device for reconstructing inter-frame dynamic gray scale based on LED lamp display |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104348761A (en) | Signal coding and decoding method | |
| Liu et al. | Some practical constraints and solutions for optical camera communication | |
| Danakis et al. | Using a CMOS camera sensor for visible light communication | |
| US8886054B2 (en) | Information transmission system, information sending device, information receiving device, information transmission method, information sending method, information receiving method and program product | |
| CN103916185B (en) | Optical signal coding/decoding method and apparatus and system | |
| US9866323B2 (en) | Techniques for optical wireless communication | |
| US9571193B2 (en) | Transmitter, receiver, and method | |
| CN107255524B (en) | Method for detecting frequency of LED light source based on mobile equipment camera | |
| KR102345777B1 (en) | Method and apparatus for determining location of a vehicle based on optical camera communication | |
| US11974078B2 (en) | Digital signage by optical communication and supplemental downlink device and method using LED illumination | |
| CN103248416A (en) | Information transmission method and device | |
| KR101114744B1 (en) | Method for recognizing a text from an image | |
| CN107222258A (en) | A kind of data capture method, data transmission method for uplink, device and data transmission system | |
| CN106372700A (en) | Optical label device combining visible light and invisible light and identification method thereof | |
| Jung et al. | Complementary Color Barcode‐Based Optical Camera Communications | |
| Stafford et al. | Tetris: Smartphone-to-smartphone screen-based visible light communication | |
| US10218439B2 (en) | Optical communication device, optical communication method, and non-transitory recording medium | |
| CN107370538A (en) | Radio data transmission method, camera and system | |
| CN103679763B (en) | The generation method and read method of a kind of modulation code and application | |
| CN107222260B (en) | Visible light communication coding and code expanding method based on variable data area length | |
| CN106209230A (en) | A kind of visible light communication system identifying striations code based on APP | |
| KR20190032837A (en) | Method and apparatus for configuring region of interest in an optical camera communication | |
| CN114175613A (en) | Color estimation device, color estimation method, and program | |
| Yokar et al. | A novel blur reduction technique for QR and ASCII coding in smartphone visible light communications | |
| Yokar et al. | Performance evaluation technique for screen‐to‐camera‐based optical camera communications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |