CN113660392B - 3D endoscope high-definition video acquisition and transmission system and method - Google Patents
3D endoscope high-definition video acquisition and transmission system and method Download PDFInfo
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- CN113660392B CN113660392B CN202110769228.7A CN202110769228A CN113660392B CN 113660392 B CN113660392 B CN 113660392B CN 202110769228 A CN202110769228 A CN 202110769228A CN 113660392 B CN113660392 B CN 113660392B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/555—Constructional details for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application discloses a 3D endoscope high-definition video acquisition and transmission system, which comprises a lens, a control box and a video receiving end; the lens comprises two paths of CMOS image sensors and a serial PHY chip, and is used for collecting video data, and the collected video data is output to the serial PHY chip through an M I P I interface; the control box is connected with the lens through a double-axis cable and comprises two paths of MP I interfaces and a de-serial PHY chip; serial video data in the serial PHY chip is transmitted to the control box through a dual-axis cable; the control box is connected with the video receiving end through an FPD-Li nk I I I serial bus, the de-serial PHY chip realizes data de-serial, and the de-serial video is output to the video receiving end through two paths of M I P I interfaces respectively; the problems of poor transmission reliability, overlarge circuit size, adverse miniaturization and high cost during long-distance transmission of video images in endoscope application in the prior art are solved.
Description
Technical Field
The disclosure belongs to the technical field of endoscope video acquisition, and particularly relates to a 3D endoscope high-definition video acquisition and transmission system and method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Thanks to the development of electronics and digital video technology, an electronic endoscope appears in the 80 th century, so that an optical fiber image is not transmitted any more, but a photosensitive integrated circuit image pickup system is used instead, and the electronic endoscope has the advantages of good image quality, strong brightness, large image, capability of checking finer lesions, finer outer diameter of the electronic endoscope, clearer and more visual image and convenient operation, and can be mainly displayed; some endoscopes, and even micro integrated circuit sensors, feed back the observed information to a computer; it not only can obtain the diagnosis information of tissue organ morphology, but also can measure various physiological functions of tissue organ.
The electronic endoscope greatly improves the diagnosis capability and reduces the discomfort of patients to the minimum; the electronic endoscope is used for placing the CMOS image sensor into a human body to realize real-time video acquisition, outputting signals to a display after image processing, and observing pathological change positions in the human body by a doctor; in order to ensure the image quality, the acquired video signals are not compressed, a 1080P resolution sensor is taken as an example, the color depth is 10Bit, the frame frequency is 30fps, the data transmission bandwidth is 622Mbps, the 3D endoscope needs two-way video acquisition, and the data bandwidth is 1244Mbps. The image sensor generally adopts an MIPI CSI-2 interface, the effective transmission distance is about 0.3m, however, video image data in general endoscope application needs to be transmitted to an image processor beyond 3-4m, and the requirements of narrow space (diameter 10 mm) and imaging quality of an endoscope are limited, so that the bandwidth, the number of signal lines and the chip size of the traditional communication LVDS bus are difficult to meet; although the method of introducing optical transmission can prolong the transmission distance, the introduction of optical fibers and electro-optical and photoelectric conversion make the whole scheme have high cost and are unfavorable for miniaturization.
Disclosure of Invention
In order to solve the problems, the disclosure provides a 3D endoscope high-definition video acquisition and transmission system and method, which solve the problems of poor transmission reliability, too large circuit size, adverse miniaturization and high cost during long-distance transmission of video images in endoscope application in the prior art.
In order to achieve the above purpose, a first aspect of the present disclosure provides a 3D endoscope high-definition video acquisition and transmission system, which adopts the following technical scheme:
A3D endoscope high-definition video acquisition and transmission system comprises a lens, a control box and a video receiving end;
the lens comprises two paths of CMOS image sensors and a serial PHY chip, and is used for collecting video data, and the collected video data is output to the serial PHY chip through an MIPI CSI-2 interface;
the control box is connected with the lens through a double-axis cable and comprises two paths of MIPI CSI-2 interfaces and an deserialized PHY chip; serial video data in the serial PHY chip is transmitted to the control box through a dual-axis cable;
the control box is connected with the video receiving end through an FPD-Link III serial bus, the de-serialization PHY chip realizes data de-serialization, and the de-serialized video is output to the video receiving end through two paths of MIPI interfaces respectively.
Furthermore, the maximum image acquisition frame frequency of the two paths of CMOS image sensors is 60fps, the video output interface is MIPI CSI-2, the highest single-channel speed is 1000Mbps, and a 24M crystal oscillator provides a clock signal source.
Further, the deserializing PHY chip realizes the data transceiving of the bandwidth 4 Gbps.
Furthermore, the control box realizes data deserialization, obtains data transmission and restores the data transmission into an MIPI CSI-2 interface, converts the MIPI interface into a parallel interface through a bridging chip, connects a serial chip in a butt joint manner, transmits video data to a post-processing receiving end, converts the video data into a parallel interface through a deserializing chip, outputs the video data through the parallel interface, and sends the video data to the video receiving end after digital isolation.
Furthermore, the control box also comprises an electrically erasable programmable read-only memory, which is used for storing the ID and the using times information of the endoscope and carrying out read-write configuration through a bus.
In order to achieve the above objective, a second aspect of the present disclosure provides a method for acquiring and transmitting high-definition video of a 3D endoscope, which adopts the following technical scheme:
A3D endoscope high-definition video acquisition and transmission method comprises the following steps:
two paths of CMOS image sensors are adopted to collect video data, and the collected video data is output to a serial PHY chip through an MIPI interface;
serial video data in the serial PHY chip is transmitted to the de-serial PHY chip through the dual-axis cable;
the de-serialization PHY chip realizes data de-serialization, and the de-serialized video is output to the video receiving end through two paths of MIPI interfaces respectively.
Furthermore, the maximum image acquisition frame frequency of the two paths of CMOS image sensors is 60fps, the video output interface is MIPI CSI-2, the highest single-channel speed is 1000Mbps, and a 24M crystal oscillator provides a clock signal source.
Further, the deserializing PHY chip realizes the data transceiving of the bandwidth 4 Gbps.
Furthermore, the de-serialization PHY chip realizes data de-serialization, data transmission is recovered to an MIPI interface, the MIPI interface is converted to a parallel interface through the bridging chip, the serial chip is in butt joint, video data is transmitted to a post-processing receiving end, the video data is converted to a parallel interface through the de-serialization chip and output, and the video data is sent to the video receiving end after digital isolation.
Furthermore, an electrically erasable programmable read-only memory is adopted to store the endoscope ID and the information of the using times, and the read-write configuration is carried out through a bus.
Compared with the prior art, the beneficial effects of the present disclosure are:
1. the total transmission bandwidth of the data can reach 2Gbps, wherein the transmission bandwidth between the lens and the handle control box is 4Gbps, two paths of FPD-Link III protocol interfaces are adopted between the control box and the clock processing terminal, each path of bandwidth can reach 1Gbps, and the two paths of bandwidths are 2Gbps; one path of video with 1080p frame frequency of 30fps (color depth of 10 bit) has data bandwidth of 622Mbps, and the 3D endoscope needs two paths of video, and the total transmission bandwidth is 1244Mbps, so that the related transmission bandwidth requirement can be met.
2. In terms of transmission distance, the distance between the CMOS sensor and the MIPI serial chip is smaller than 10mm, and the distance is within the MIPI CSI-2 nominal transmission distance range; the MIPI serial receiving and transmitting PHY is adopted between the lens and the handle control box, the transmission distance can reach 1m, and the requirement of 0.6m of the endoscope transmission distance can be met; the control box and the video processing terminal are communicated through the FPD-Link III protocol, the transmission distance can reach more than 15m, and the transmission distance requirement of an endoscope, which is 3-4m generally, can be met.
3. The chip packaging size is mainly limited to a lens part, the diameter of the lens part is 10mm, the circuit adopts two CMOS chips of 3.8x2.9mm and MIPI serial chips of 7x7mm, the design size of the PCB is smaller than 9mm, and the product requirement can be met through practical assembly test.
4. The high-speed serial differential interface is adopted in the method, and the signal anti-interference performance is strong. According to relevant EMC related national standards, the 3D endoscope video transmission circuit is actually tested, and the video transmission is confirmed to be stable and reliable, and the image quality is good.
5. The hardware cost and the production and assembly process requirements of the circuit are disclosed; through cost accounting, the hardware cost of the circuit is reduced by more than 40% compared with the prior scheme, the assembly process is simple, and compared with the optical fiber transmission scheme, the twisted pair cable is not easy to damage and is simpler to maintain and replace.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate and explain the embodiments and together with the description serve to explain the embodiments.
FIG. 1 is a hardware block diagram of the front end of an endoscope of embodiment 1 of the present disclosure;
FIG. 2 is a circuit block diagram of an endoscopic video processing terminal of embodiment 1 of the present disclosure;
FIG. 3 is a block diagram of a circuit between a lens and a control box according to embodiment 1 of the present disclosure;
fig. 4 is a control box MIPI to parallel circuit of embodiment 1 of the present disclosure;
FIG. 5 is an FPD-Link serial circuit of embodiment 1 of the present disclosure;
fig. 6 is an FPD-Link deserializing circuit of embodiment 1 of the present disclosure;
fig. 7 is a block diagram of a transmission circuit between a control box and a video processing terminal of embodiment 1 of the present disclosure.
The specific embodiment is as follows:
the disclosure is further described below with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Example 1:
as shown in fig. 1 and 2, the present disclosure provides a 3D endoscope high definition video acquisition and transmission system, which includes three parts of a lens, a handle control box and a video receiving end.
The lens part integrates two 1/6 CMOS image sensors, preferably, the CMOS image sensor adopts an OV2740 model, specifically, the resolution is 1920x1080, the packaging size is 3.8x2.9mm, the maximum image acquisition frame frequency is 60fps, the video output interface is MIPI CSI-2, the highest single channel speed is 1000Mbps, and a 24M crystal oscillator provides a clock signal source.
Specifically, as shown in fig. 1, two paths of CMOS sensors collect video data, the video data is output to a serial PHY chip through an MIPI interface, the serial video data is transmitted to the control box through a dual-axis cable, the de-serial PHY chip realizes data de-serial, and the video is output through two paths of MIPI interfaces respectively; the serial de-serial PHY chip can realize data transceiving with the bandwidth as high as 4Gbps, and completely meets the bandwidth requirement of two paths of video transmission.
As shown in fig. 1, the handle control box part realizes data deserialization to obtain data transmission and restore to an MIPI interface, converts the MIPI CSI-2 interface to a parallel interface through a Toshiba bridge chip, interfaces a PFD-Link III serial chip, transmits video data to a post-processing receiving end, converts to a parallel interface through an FPD-Link III deserializing chip, outputs the parallel interface, and sends the parallel interface to the video processing unit after digital isolation; the serial chip model adopts DS90UB913AQ, and the deserializing chip model adopts DS90UB914.
As shown in fig. 1, an EEPROM (electrically erasable programmable read only memory) is used to store endoscope ID and usage number information, and is provided with I 2 C bus for reading and writing configuration, specifically I 2 The C bus is responsible for realizing configuration management of a CMOS image sensor, MIPI (micro-processor interface) parallel conversion and FPD-Link III serial deserializing chip, I 2 The C bus master is a video processing terminal.
The embodiment can realize the remote transmission of video images; the MIPI CSI-2 specification itself suggests that the maximum wiring length is 25-30cm, and the distance between the CMOS image sensor and the MIPI serial chip in the embodiment is smaller than 10mm; the transmission distance between MIPI serial/deserializing chips can be up to, and the actual circuit distance is not more than 60cm; the control box is connected with the video processing terminal through an FPD-Link III serial bus, and video image data in the common endoscope application needs to be transmitted to an image processor beyond 3-4 meters. According to the technical manual of the chip official TI company, coaxial cables up to 15m or shielding twisted pair cables of 20m can be connected, and the transmission distance requirement can be completely met.
The CMOS acquires video data, outputs the video data through MIPI CSI-2, transmits the video data to a handle control box through a serial/deserializing chip, and transmits the video data to a video processing terminal through an FPD-Link III serial bus; the video is transmitted by adopting a high-speed serial differential interface, so that the anti-interference capability is high, and the circuit design meets the reliability requirement of medical equipment.
The diameter of the lens part of the endoscope is 10mm, the space is very narrow, and the requirement on the packaging size of the chip is high; the FPGA chip is adopted to realize the high-speed serial interface or the MIPI CSI-2 is converted into the LVDS interface, so that the packaging size is overlarge, the heating value is large, the cost is high, and the miniaturized design of the endoscope head end is not facilitated; the scheme of converting MIPI CSI-2 into DVP causes excessive number of transmission data lines, which is not beneficial to the reduction of the diameter of a main hose of an endoscope and the simplification of welding assembly; the serial chip used in this example had a package size of 7mm x7mm and a maximum power of 18mW.
Example 2:
the embodiment provides a 3D endoscope high-definition video acquisition and transmission method, which comprises the following steps:
two paths of CMOS image sensors are adopted to collect video data, and the collected video data is output to a serial PHY chip through an MIPI interface; specifically, the maximum image acquisition frame frequency of the two paths of CMOS image sensors is 60fps, the video output interface is MIPI CSI-2, the highest single-channel speed is 1000Mbps, and a 24M crystal oscillator provides a clock signal source.
Serial video data in the serial PHY chip is transmitted to the de-serial PHY chip through the dual-axis cable; specifically, the deserializing PHY chip realizes the data transceiving of bandwidth 4 Gbps.
The de-serialization PHY chip realizes data de-serialization, and the de-serialized video is output to the video receiving end through two paths of MIPI interfaces respectively; the de-serializing PHY chip realizes data de-serializing, obtains data transmission and restores to an MIPI interface, converts the MIPI interface to a parallel interface through the bridging chip, connects the serial chip in a butt joint way, transmits video data to a post-processing receiving end, converts the video data to a parallel interface through the de-serializing chip, outputs the video data after digital isolation, and sends the video data to the video receiving end.
In this embodiment, an electrically erasable programmable rom is used to store the endoscope ID and the usage number information, and the read-write configuration is performed via a bus.
Compared with the prior art, the beneficial effects of the present disclosure are:
1. the transmission circuit adopts a high-speed serial differential interface, has strong signal anti-interference performance, and can meet the reliable transmission requirement of medical endoscope product data;
2. the transmission circuit adopts an interface chip to package little (7 mm x7 mm), has high data bandwidth, can realize up to 2Gbps bandwidth in a single channel, and meets the requirement of two-way video bandwidth of a 3D endoscope;
3. the transmission distance of the MIPI interface is short, the transmission distance of more than 10m can be realized through circuit design, and the transmission requirement of a medical endoscope 3-4m is completely met;
4. the method effectively reduces hardware cost, adopts an optical fiber transmission distance extension scheme, has high cost, and cannot meet the requirement in space.
The above description is only a preferred embodiment of the present embodiment, and is not intended to limit the present embodiment, and various modifications and variations can be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.
Claims (10)
1. The 3D endoscope high-definition video acquisition and transmission system is characterized by comprising a lens, a control box and a video receiving end;
the lens comprises two paths of CMOS image sensors and an MIPI serial chip, and is used for acquiring video data, and the acquired video data is output to the MIPI serial chip through an MIPI interface;
the control box is connected with the lens through a double-axis cable and comprises two paths of MIPI interfaces and MIPI deserializing chips; serial video data in the MIPI serial chip is transmitted to the MIPI deserializing chip of the control box through a dual-axis cable; the distance between the CMOS image sensor and the MIPI serial chip is smaller than 10mm; the actual circuit distance between the MIPI serial chip and the MIPI deserializing chip is not more than 60cm; the diameter of the lens part of the endoscope is 10mm;
the control box is connected with the video receiving end through an FPD-Link III serial bus, the FPD-Link III deserializing chip realizes data deserializing, and the deserialized video is output to the video receiving end through two paths of MIPI interfaces respectively.
2. The 3D endoscope high definition video acquisition and transmission system of claim 1, wherein the maximum image acquisition frame frequency of the two paths of CMOS image sensors is 60fps, the video output interface is MIPI CSI-2, the highest single channel speed is 1000Mbps, and the 24M crystal oscillator provides a clock signal source.
3. The 3D endoscope high definition video acquisition and transmission system of claim 1, wherein the MIPI deserializing chip implements bandwidth 4Gbps data transceiving.
4. The 3D endoscope high definition video acquisition and transmission system of claim 1, wherein the MIPI deserializing chip of the control box realizes data deserializing, obtains data transmission and restores to MIPI interface, converts MIPI interface to parallel interface through bridging chip, connects FPD-Link III serial chip, transmits video data to post-processing receiving end, converts to parallel port through the FPD-Link III deserializing chip, outputs after digital isolation, and sends to video receiving end.
5. The 3D endoscope high definition video acquisition and transmission system of claim 1, wherein the control box further comprises an electrically erasable programmable read only memory for storing endoscope ID and usage number information, and performing read-write configuration via a bus.
6. The 3D endoscope high-definition video acquisition and transmission method is characterized by being applied to a 3D endoscope high-definition video acquisition and transmission system, and the system comprises: the system comprises a lens, a control box and a video receiving end; the method comprises the following steps:
outputting video data acquired by a lens to an MIPI serial chip through an MIPI interface; the lens comprises two paths of CMOS image sensors and an MIPI serial chip;
transmitting serial video data in the MIPI serial chip to a MIPI deserializing chip in the control box through a dual-axis cable; the control box is connected with the lens through a double-axis cable; the distance between the CMOS image sensor and the MIPI serial chip is smaller than 10mm; the actual circuit distance between the MIPI serial chip and the MIPI deserializing chip is not more than 60cm; the diameter of the lens part of the endoscope is 10mm;
realizing data deserialization through an FPD-Link III deserializing chip, and outputting the video after deserialization to the video receiving end through two paths of MIPI interfaces respectively; the control box is connected with the video receiving end through an FPD-Link III serial bus.
7. The 3D endoscope high-definition video acquisition and transmission method according to claim 6, wherein the maximum image acquisition frame frequency of the two paths of CMOS image sensors is 60fps, the video output interface is MIPICII-2, the highest single channel speed is 1000Mbps, and a 24M crystal oscillator provides a clock signal source.
8. The method for acquiring and transmitting the high-definition video of the 3D endoscope as claimed in claim 6, wherein the MIPI deserializing chip realizes the data receiving and transmitting of bandwidth 4 Gbps.
9. The method for acquiring and transmitting the high-definition video of the 3D endoscope according to claim 6, wherein the MIPI deserializing chip of the control box realizes data deserializing, obtains data transmission and restores the data transmission to an MIPI interface, converts the MIPI interface to a parallel interface through a bridging chip, connects an FPD-LinkIII serial chip in a butt joint manner, transmits video data to a post-processing receiving end, converts the video data to a parallel port through the FPD-LinkIII deserializing chip, outputs the video data after digital isolation, and sends the video data to the video receiving end.
10. The 3D endoscope high-definition video acquisition and transmission method according to claim 6, wherein an electrically erasable programmable read-only memory is used for storing endoscope ID and using times information, and reading and writing configuration is carried out through a bus.
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| CN113660392A (en) | 2021-11-16 |
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