CN102164232B - Data communication method between two cameras and realization method thereof - Google Patents
Data communication method between two cameras and realization method thereof Download PDFInfo
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Abstract
The invention provides a data communication method between two cameras, which comprises the following steps: setting one camera as a master chip, and setting the other camera as a slave chip; setting the working state of the master chip and the slave chip so that the master chip works in a line blanking state and the slave chip works in a line effective state, wherein when the master chip works in the line effective state, the slave chip works in the line blanking state; and enabling the slave chip to output image data in the line effective state and the master chip to receive digital signals from the slave chip in the line blanking state. The invention also provides a dual-camera device for realizing the data communication method between two cameras. According to the invention, cooperative work is realized through a dual-camera time division multiplexing processing unit and interface, the external communication interface and processing unit of the slave chip are saved, and the required pins are reduced so that the chip area can be smaller, the cost of realizing the dual-camera scheme is lowered, and the installation space of the two cameras is reduced at the same time.
Description
Technical field
The present invention relates to image processing field, particularly the Double-camera device of data communication method and realization the method between a kind of dual camera.
Background technology
Camera is widely used in the digital products such as mobile phone, PDA and panel computer at present as a kind of IMAQ instrument.For the user who improves equipment experiences and the enhancing individual function, more and more many digital products have adopted dual camera IMAQ scheme, place respectively the different parts (generally dividing front camera and rear camera) of equipment, to realize the multi-angle image collection.In existing dual camera solution, generally be that dual camera communicates with system's master chip (generally being baseband chip) respectively: mode and upper system such as at present the most frequently used each camera (Digital Video Port) pattern take interface as DVP carry out communication, generally need each camera that the image processing section of oneself and the data output pin that is connected with upper system are all arranged under this pattern.This kind dual camera connection mode is had relatively high expectations for the equipment placement space, and the scheme cost that the while dual camera all has image processing apparatus is also relatively high.
Publication number is that the Chinese patent application of CN101877760A has proposed a kind of dual-camera structure based on same DVP data/address bus, particularly, relate to a kind of connectivity scenario of dual camera in mobile phone based on same DVP data/address bus, use this scheme, can be on single data processing chip (DSP) platform, realization is to control and the support of major-minor dual camera, and can finish the several functions such as configuration to dual camera, use, switching, dormancy.But, this kind scheme is coordinated work between the major-minor camera by external single data processing chip, just on the mode of camera and upper system communication, improved, do not improve for camera itself, single camera still need be equipped with functional unit separately, and dual camera installing space and realization cost control are limited.
Summary of the invention
The problem that the present invention solves is that main camera chip area is limited in the existing dual camera solution, does not have the place to put enough data I/O pins, so that dual camera is realized the higher problem of cost.
For addressing the above problem, the present invention proposes the method for data communication between a kind of dual camera, comprising:
Double-camera device is provided, and a setting wherein camera is master chip, and it is from chip that an other camera is set;
Arrange master chip with from the operating state of chip, when making master chip be operated in the state of horizontal blanking, from the chip operation effective status of being expert at, when effective status is expert in master chip work, from the state of chip operation in horizontal blanking;
Make from the chip output image data under the effective status of being expert at the digital signal that master chip is expert at and is received under the hidden state to come from chip.
Proposed simultaneously the Double-camera device of data communication method between the described dual camera of a cover realization, comprised that master chip reaches from chip, wherein:
Describedly comprise from chip:
Photosensitive unit is used for obtaining picture signal;
Sensing element is used for reading the picture signal in the photosensitive unit;
Digital unit is used for converting analog picture signal to digital signal;
And output unit, comprise output interface, be used for output digit signals;
Described master chip comprises:
Photosensitive unit is used for obtaining picture signal;
Sensing element is for the picture signal that reads photosensitive unit;
Digital unit is used for converting analog picture signal to digital signal;
Processing unit is used for digital signal is processed the formation view data;
Input-output unit comprises data-interface, is used for to the upper system output image data; And when master-slave mode, in the horizontal blanking interval of master chip, receive the digital signal of coming from chip.
Preferably, when master chip is operated in the state of horizontal blanking, from the chip operation effective status of being expert at, when effective status is expert in master chip work, from the state of chip operation in horizontal blanking.
Preferably, during from chip operation, within the time of master chip horizontal blanking, the data pins that is connected with master chip from the chip is output state, be input state with the data pins that is connected from chip on the master chip, be used for master chip and receive digital signal since chip; In the time of the capable effectively transmission of master chip, the data pins that is connected with master chip from the chip is high-impedance state, is output state with the data pins that is connected from chip on the master chip, and the data pins by master chip is to the upper system output image data.
Compared with prior art, the present invention has the following advantages: the present invention utilizes dual camera time-sharing multiplex processing unit and interface and realizes collaborative work, saved the graphics processing unit from chip, the pin that has needed when having reduced the master chip communication, make master/slave chip area can do littlely, reduce the dual camera scheme and realized cost, dwindled simultaneously the installing space of dual camera.
Description of drawings
Fig. 1 is camera element schematic diagram in the prior art of the present invention.
Fig. 2 is Double-camera device basic boom schematic diagram of the present invention.
Fig. 3 is the working state figure of the means of communication between the dual camera of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, be described in detail below in conjunction with the embodiment of accompanying drawing to the invention of this reality.
In the existing dual camera image processing apparatus, see also Fig. 1, the internal structure of each camera is basic identical, includes: photosensitive unit 101 is used for obtaining picture signal; Sensing element 102 is for the picture signal that reads photosensitive unit; Digital unit 103 is used for analog signal conversion is become digital signal; Processing unit 104 is used for digital signal is processed, and finishes such as denoising, interpolation, Edge Enhancement, gray correction, color correction and other image processing functions; Input-output unit 105 comprises data-interface, is used for to the upper system output image signal.
The inventor finds through research, cam device is in working order the time, there is the part-time data output interface not to be in the data output state, utilize this part time, can receive the picture signal that other cam devices transmit and process, this part time can be defined as the free time of camera work.Particularly, light signal is converted in the scanning process of the signal of telecommunication at cam device, always from the upper left corner of image, level is advanced forward in scanning, and scanning element also moves down with slower speed simultaneously.When scanning element arrives the image right side edge, scanning element fast return left side, restart below the starting point of the 1st row, to carry out the 2nd line scanning, the time of every line scanning is referred to as row effective (level be'ss effective) time, the time that return course between row and the row consumes is called horizontal blanking (horizontal blanking) time, horizontal blanking during this period of time in, cam device stops to export data, therefore the data-interface of its input-output unit is in idle condition, belongs to free time a kind of of camera work.
From the above mentioned, when cam device work during to the horizontal blanking state, the data-interface of input-output unit can be used for receive data, processes simultaneously external data, the image signal output after will processing in the effective time of being expert at.Based on this principle, the image processing apparatus of a camera in the Double-camera device can be saved, utilize the data processing unit of another one camera and carry out data with the communication interface of upper system and process, reduce dual camera scheme realization cost in the prior art thereby reach, dwindle simultaneously the purpose of the installing space of dual camera, guaranteed simultaneously signal processing quality.For realizing this purpose, the inventor has proposed the method for data communication between a kind of dual camera, comprising:
Double-camera device is provided, and a setting wherein camera is master chip, and it is from chip that an other camera is set;
Arrange master chip with from the operating state of chip, when making master chip be operated in the state of horizontal blanking, from the chip operation effective status of being expert at, when effective status is expert in master chip work, from the state of chip operation in horizontal blanking;
Make from the chip output image signal under the effective status of being expert at the digital signal that master chip is expert at and is received under the hidden state to come from chip.
Proposed simultaneously the Double-camera device of a cover realization the method, seen also Fig. 2, having comprised:
Comprise that master chip 100 reaches from chip 200, wherein,
Describedly comprise from chip 200:
And output unit 204, comprise output interface, be used for output digit signals;
Described master chip 100 comprises:
Input-output unit 105 comprises data-interface, is used for to the upper system output image data; And when master-slave mode, in the horizontal blanking interval of master chip 100, receive the digital signal from chip 200.
Below in conjunction with drawings and Examples the specific embodiment of the invention is described further:
The Double-camera device that comprises that master chip 100 reaches from chip 200 at first is provided, and a setting wherein camera is master chip 100, and it is from chip 200 that an other camera is set.Please continue to consult Fig. 2, wherein, describedly comprise from chip 200: photosensitive unit 201 is used for obtaining picture signal; Sensing element 202 is used for reading the picture signal in the photosensitive unit; Digital unit 203 is used for converting analog picture signal to digital signal; And output unit 204, comprising output interface, described output interface is connected with the data-interface of master chip input-output unit 105, is used for to master chip 100 output digit signals; Described master chip 100 comprises: photosensitive unit 101 is used for obtaining picture signal; Sensing element 102 is for the picture signal that reads photosensitive unit 101; Digital unit 103 is used for converting analog picture signal to digital signal; Processing unit 104 is used for digital signal is processed the formation view data; Input-output unit 105 comprises data-interface, is used for to the upper system output image data; And when master-slave mode, in the horizontal blanking interval of master chip 100, receive the digital signal from chip 200.
According to the first embodiment of the present invention, described master chip 100 carries out communication with DVP parallel port mode and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 1 data output pin and other pin, and described master chip 100 comprises 8 data output pins and other pins; With 1 in the data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; In master chip 100 other data output pins any 1 is connected to the data output pin from chip 200.
One according to first embodiment of the invention changes example, described master chip 100 carries out communication with DVP parallel port mode and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 2 data output pins and other pin, and described master chip 100 comprises 8 data output pins and other pins; With 1 in the data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; In master chip 100 other data output pins any 2 are connected to the data output pin from chip 200.
Another variation example according to first embodiment of the invention, described master chip 100 carries out communication with DVP parallel port mode and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 3 data output pins and other pin, and described master chip 100 comprises 8 data output pins and other pins; With 1 in the data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; In master chip 100 other data output pins any 3 are connected to the data output pin from chip 200.
Another variation example according to first embodiment of the invention, described master chip 100 carries out communication with DVP parallel port mode and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 4 data output pins and other pin, and described master chip 100 comprises 8 data output pins and other pins; With 1 in the data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; In master chip 100 other data output pins any 4 are connected to the data output pin from chip 200.
According to a second embodiment of the present invention, described master chip 100 carries out communication with SPI serial ports pattern and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 1 data output pin and other pin, and described master chip 100 comprises 8 data output pins and other pins; Wherein, master chip 100 with in 8 data output pins wantonly 1 as with the SPI data pins of upper system communication; With 1 in the remainder data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; After this, select any 1 in the residue master chip 100 data output pins, be connected to the data output pin from chip 200.
According to a second embodiment of the present invention one changes example, described master chip 100 carries out communication with SPI serial ports pattern and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 4 data output pins and other pin, and described master chip 100 comprises 8 data output pins and other pins; Wherein, master chip 100 with in 8 data output pins wantonly 1 as with the SPI data pins of upper system communication; With 1 in the remainder data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; After this, select any 4 in the residue master chip 100 data output pins, be connected to the data output pin from chip 200.
Another variation example according to second embodiment of the invention, described master chip 100 carries out communication with SPI serial ports pattern and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 2 data output pins and other pin, and described master chip 100 comprises 8 data output pins and other pins; Wherein, master chip 100 with in 8 data output pins wantonly 2 as with the SPI data pins of upper system communication; With 1 in the remainder data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; After this, select any 2 in the residue master chip 100 data output pins, be connected to the data output pin from chip 200.
Another variation example according to second embodiment of the invention, described master chip 100 carries out communication with SPI serial ports pattern and upper system, described data-interface pin from chip output unit 204 comprises 1 clock output pin, 1 data output pin and other pin, and described master chip 100 comprises 8 data output pins and other pins; Wherein, master chip 100 with in 8 data output pins wantonly 4 as with the SPI data pins of upper system communication; With 1 in the remainder data output pin of master chip 100 as the clock input pin, be connected to the clock output pin from chip 200; After this, select any 1 in the residue master chip 100 data output pins, be connected to the data output pin from chip 200.
Secondly, master chip 100 and operating state from chip 200 are set, when making master chip 100 be operated in the state of horizontal blanking, from the chip 200 work effective status of being expert at, when effective status is expert in master chip 100 work, are operated in the state of horizontal blanking from chip 200.With reference to Fig. 3, can master chip 100 be set to same frequency with working clock frequency from chip 200, when making master chip work be expert at effectively state, from the state of chip operation in horizontal blanking; When master chip is operated in the state of horizontal blanking, from the chip operation effective status of being expert at.
Secondly, make from chip 200 output image data under the effective status of being expert at, master chip 100 is expert at and is received picture signal from chip 200 under the hidden state.
According to the first embodiment of the present invention and change example, the mode of operation of described Double-camera device comprises the master-slave mode that works independently master chip 100 pattern and principal and subordinate's chip work simultaneously, and its master chip 100 and upper system are with the communication of DVP parallel port mode.Further particularly, during described master-slave mode: obtain picture signal from the photosensitive unit 201 of chip 200; From chip sensing element 202 read picture signal and with described image signal transmission to digital unit 203; Digital unit 203 is processed described picture signal and is formed digital signal, in master chip 100 horizontal blankings, in the effective time of chip 200 row, digital signal is inputed to master chip input-output unit 105 by the DVP interface; The digital signal of 104 pairs of inputs of master chip processing unit is processed the formation view data, and at master chip 100 row effectively, in the time of chip 200 horizontal blankings, view data is sent to upper system by the DVP interface.Wherein, can be serial communication or parallel port communication from the communication modes between chip 200 and the master chip 100, preferably, the communication modes between principal and subordinate's chip can be the serial communication pattern with packet header.The data of its transmission can be any position, and with indicating the position, are used for master chip 100 identifications and location.Further particularly, from chip 200 work the time, in the time of master chip 100 horizontal blankings, the data pins that is connected with master chip 100 from the chip 200 is output state, be input state with the data pins that is connected from chip 200 on the master chip 100, be used for the digital signal that master chip 100 receives since chip 200; In the time that master chip 100 row effectively transmit, the data pins that is connected with master chip 100 from the chip 200 is high-impedance state, be output state with the data pins that is connected from chip 200 on the master chip 100, the data pins by master chip 100 is to the upper system output image data.When described master chip 100 worked independently: the master chip photosensitive unit obtained picture signal; Sensing element read the picture signal obtained and with described image signal transmission to processing unit 104; 104 pairs of described picture signals of processing unit are processed the formation view data, and are sent to input-output unit 105; Input-output unit 105 output image datas are to upper system.
According to a second embodiment of the present invention and change example, the mode of operation of described Double-camera device comprises the master-slave mode that works independently master chip 100 pattern and principal and subordinate's chip work simultaneously, and its master chip 100 and upper system are with SPI mouth mode communication.Further particularly, during described master-slave mode: obtain picture signal from the photosensitive unit 201 of chip 200; From chip sensing element 202 read picture signal and with described image signal transmission to digital unit 203; Digital unit is processed described picture signal and is formed digital signal, because having used respectively different master chip pins from chip 200 output pins from the output pin of master chip 100, so no matter be in master chip 100 horizontal blankings or in the effective time of master chip 100 row, all digital signal can be inputed to master chip input-output unit 105; The digital signal of 104 pairs of inputs of master chip processing unit is processed the formation view data, and at master chip 100 row effectively, in the time of chip 200 horizontal blankings, view data is sent to upper system by the SPI pin.Wherein, can be serial communication or parallel port communication from the communication modes between chip 200 and the master chip 100, preferably, the communication modes between principal and subordinate's chip can be the serial communication pattern with packet header.The data of its transmission can be any position, and with indicating the position, are used for master chip 100 identifications and location.When described master chip 100 worked independently: master chip 100 photosensitive units 101 obtained picture signal; Sensing element 102 is read the picture signal obtained and described image signal transmission is formed digital signals to digital unit 103, and digital signal enters processing unit 104; 104 pairs of described digital signals of processing unit are processed the formation view data, and are sent to input-output unit 105; Input-output unit 105 output image datas are to upper system.
Although the present invention with preferred embodiment openly as above; but it is not to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made possible change and modification; therefore; every content that does not break away from technical solution of the present invention; to any simple modification, equivalent variations and modification that above embodiment does, all belong to the protection range of technical solution of the present invention according to technical spirit of the present invention.
Claims (2)
1. the method for data communication between the dual camera is characterized in that:
Double-camera device is provided, and a setting wherein camera is master chip, and it is that wherein, described master chip comprises from chip that an other camera is set: photosensitive unit is used for obtaining picture signal; Sensing element is for the picture signal that reads photosensitive unit; Digital unit is used for converting analog picture signal to digital signal; Processing unit is used for digital signal is processed the formation view data; Input-output unit comprises data-interface, is used for to the upper system output image data, and when master-slave mode, in the horizontal blanking interval of master chip, receives the digital signal of coming from chip; Describedly comprise photosensitive unit from chip, be used for obtaining picture signal; Sensing element is used for reading the picture signal in the photosensitive unit; Digital unit is used for converting analog picture signal to digital signal; And output unit, comprising output interface, described output interface is connected with the data-interface of master chip input-output unit, is used for to the master chip output digit signals;
Arrange master chip with from the operating state of chip, when making master chip be operated in the state of horizontal blanking, from the chip operation effective status of being expert at, when effective status is expert in master chip work, from the state of chip operation in horizontal blanking;
Make from the chip output digit signals under the effective status of being expert at the digital signal that master chip is expert at and is received under the hidden state to come from chip.
2. dual camera processing unit of realizing the described method of claim 1, it is characterized in that, during from chip operation, within the time of master chip horizontal blanking, the data pins that is connected with master chip from the chip is output state, be input state with the data pins that is connected from chip on the master chip, be used for master chip and receive digital signal since chip; In the time of the capable effectively transmission of master chip, the data pins that is connected with master chip from the chip is high-impedance state, is output state with the data pins that is connected from chip on the master chip, and the data pins by master chip is to the upper system output image data.
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| WO2012100541A1 (en) * | 2011-01-25 | 2012-08-02 | Galaxycore Inc. | Method and device for data communication between two cameras |
| CN103309838B (en) * | 2012-03-16 | 2018-02-27 | 联想(北京)有限公司 | Switching method, terminal device and the multi-terminal equipment system of information collecting device |
| CN109672869A (en) * | 2019-02-11 | 2019-04-23 | 湖南国科微电子股份有限公司 | A kind of time-sharing multiplex image processing apparatus, method and electronic equipment |
| CN110392149A (en) * | 2019-07-23 | 2019-10-29 | 华为技术有限公司 | Image capture display terminal |
| KR102473842B1 (en) * | 2021-04-21 | 2022-12-05 | (주)에이피텍 | Camera module manufacturing in-line system equipped with work head module and manufacturing method using the system |
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| US20040201681A1 (en) * | 2001-06-21 | 2004-10-14 | Jack Chen | Multimedia data file producer combining image and sound information together in data file |
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| CN101877760A (en) * | 2009-04-29 | 2010-11-03 | 上海观图光电科技有限公司 | Dual-camera structure based on same DVP (Digital Version Port) data bus |
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