WO2013170765A1 - 一种传输视频信号的方法、装置、系统和终端 - Google Patents
一种传输视频信号的方法、装置、系统和终端 Download PDFInfo
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- WO2013170765A1 WO2013170765A1 PCT/CN2013/075716 CN2013075716W WO2013170765A1 WO 2013170765 A1 WO2013170765 A1 WO 2013170765A1 CN 2013075716 W CN2013075716 W CN 2013075716W WO 2013170765 A1 WO2013170765 A1 WO 2013170765A1
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- Prior art keywords
- signal
- analog
- digital
- digital signal
- video
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000008054 signal transmission Effects 0.000 title abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 238000012545 processing Methods 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004590 computer program Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 241000023320 Luma <angiosperm> Species 0.000 description 5
- OSWPMRLSEDHDFF-UHFFFAOYSA-N methyl salicylate Chemical compound COC(=O)C1=CC=CC=C1O OSWPMRLSEDHDFF-UHFFFAOYSA-N 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/143—Encoding means therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/08—Slip-rings
-
- 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
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
- H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/143—Electron beam
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a system, and a terminal for transmitting a video signal. Background technique
- HD dome cameras In the security industry, the requirements for high-definition video images are high, especially for HD video formats such as 720p and 1080p, which have gradually become the industry standard.
- HD dome cameras also need to meet the needs of high-definition video.
- the HD dome camera is mainly based on the product of the network dome camera and the Serial Digital Interface (SDI) dome camera, and the movement inside the dome camera can be within 360 degrees in the horizontal direction and 90 degrees in the vertical direction. Any rotation within a degree or within 180 degrees, the movement and the main control board are connected by a conductive slip ring device, which ensures the electrical connection reliability of the movement when rotating.
- SDI Serial Digital Interface
- the transmission methods used mainly include the following two types:
- the video signal output from the movement is converted into a high-definition digital component serial interface (HD-SDI) signal, which is transmitted to the control board via a conductive slip ring, but the clock frequency of the HD-SDI signal is about 1.485 GHz.
- Digital signals with higher clock frequencies cannot be transmitted on ordinary conductive slip ring devices, and special conductive slip ring devices with expensive and complicated process complexity are required, and the signals are easily disturbed.
- the Signaling, LVDS) signal which is transmitted to the control board via the conductive slip ring device, transmits the differential signal by using multiple channels to share the amount of data. Taking five channels as an example, the signal is transmitted at a clock frequency of 270 MHz. The frequency of the transmitted signal is still high and susceptible to interference, and the performance of the conductive slip ring device is highly demanded.
- Due to the large increase in the number of channels and the addition of a synchronous clock it is necessary to add a plurality of transmission cables, and the volume of the conductive slip ring device is greatly increased, thereby increasing the cost. As a result, the structure of the spherical camera is limited by the volume of the conductive slip ring device, and the miniaturization design cannot be achieved.
- the conductive slip ring device has the characteristics of discontinuous impedance and many times of switching, it has a large negative impact on the integrity of the high-frequency digital signal or analog signal, and the signal shield, thereby reducing The accuracy of transmitting video images is prone to problems such as image block, jitter, and frame loss. Also, it is possible to limit the size of the spherical camera. Summary of the invention
- Embodiments of the present invention provide a method, apparatus, system, and terminal for transmitting a video signal, which can improve the integrity of a transmitted signal and ensure the shield of the signal.
- An embodiment of the present invention provides a method for transmitting a video signal, including:
- an embodiment of the present invention provides an apparatus for transmitting a video signal, including:
- a separation module configured to separate the current original video digital signal acquired by the movement into a luminance signal and a chrominance signal
- a conversion module configured to convert the luminance signal and the chrominance signal into a video analog signal
- a sending module configured to send the video analog signal to the main control board through the conductive slip ring device
- a restoration module configured to convert the video analog signal back to the current original video digital signal in the main control core board.
- an embodiment of the present invention provides a terminal, including: the foregoing apparatus for transmitting a video signal.
- an embodiment of the present invention provides a system for transmitting a video signal, including: a movement, an encoder, a digital-to-analog converter, a conductive slip ring device, and an analog-to-digital converter and a decoder located in the main control core board;
- the movement is configured to acquire a current original video digital signal
- the encoder is configured to separate the original digital signal acquired by the movement into a luminance signal and a chrominance signal; convert the luminance signal and the chrominance signal into a video analog signal in combination with the digital-to-analog converter;
- the device transmits the video analog signal to the main control core board;
- the analog to digital converter and decoder located in the main control board are configured to convert the video analog signal back to the current original video digital signal.
- Embodiments of the present invention provide a method, apparatus, system, and terminal for transmitting a video signal, which are used to separate a current original video digital signal acquired by a movement into a luminance signal and a chrominance signal; and the luminance signal and the chrominance signal Converting to a video analog signal; transmitting the video analog signal to a master control board via a conductive slip ring device; converting the video analog signal back to the current raw video digital signal in the master core board.
- the method, device, system and terminal for transmitting a video signal provided by the embodiment of the present invention obtain a video analog signal by separating the current original video digital signal into a luminance signal and a chrominance signal, and respectively performing encoding.
- the main control board converts the video analog signal back to the original video digital signal. Thereby, the integrity of the transmitted video signal can be improved, and the shield of the video signal can be ensured.
- FIG. 1 is a schematic flowchart of a method for transmitting a video signal according to an embodiment of the present invention
- FIG. 2 is a schematic flow chart of a method for transmitting a video signal according to another embodiment of the present invention.
- FIG. 3 is a schematic flow chart of a method for transmitting a video signal according to another embodiment of the present invention.
- FIG. 4 is a schematic diagram of an apparatus for transmitting a video signal according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a system for transmitting a video signal according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram of a system for transmitting a video signal according to another embodiment of the present invention. detailed description
- the embodiment of the present invention provides a method for transmitting a video signal. As shown in FIG. 1, the method includes:
- Step 101 Separating the current original video digital signal acquired by the movement into a luminance signal and a chrominance signal;
- Step 102 converting the luminance signal and the chrominance signal into a video analog signal;
- Step 103 Send a video analog signal to the main control core board through the conductive slip ring device;
- Step 104 Convert the video analog signal back to the current original video digital signal in the main control board.
- the method provided by the embodiment of the present invention converts the current original video digital signal acquired by the movement into a video analog signal for transmission.
- the original video digital signal is first separated into a luminance signal and a chrominance signal, and then the luminance signal and the chrominance signal are converted into a video analog signal.
- the luminance signal is processed by the digital filter, and then encoded in a baseband manner to form a luminance-encoded digital signal;
- the chrominance signal is subjected to intermediate frequency carrier coding to form a chrominally encoded digital signal; and the luminance-encoded digital signal and the chrominance-encoded digital are used.
- the signals are superimposed to form an encoded digital signal, they are converted into a video analog signal by digital-to-analog conversion.
- the video analog signal is then sent to the main control board via a conductive slip ring device.
- the main control board converts the received video analog signal back to the current original video digital signal.
- the received video analog signal is converted into an encoded digital signal by analog-to-digital conversion; the encoded digital signal is decoded and converted back to the current original video digital signal.
- the frequency of the video analog signal may be less than the upper limit of the electrical signal transmission of the conductive slip ring device, in order to reduce the cost and improve the reliability of the processing and transmission of the video analog signal, and avoid the wear caused by the long-term rotation of the high-rate conductive slip ring device.
- the video analog signal in the embodiment of the present invention may be further specifically a low frequency video analog signal.
- the brightness coded digital signal and the chrominance coded digital signal may be converted into a first analog signal and a second analog signal, respectively, and then the two analog signals are respectively converted into digital signals on the main control board end, and then superimposed, thereby
- the video analog signal is converted back to the current original video digital signal.
- the luminance signal is processed by the digital filter, Encoding in a baseband manner to form a luma-coded digital signal; converting the luma-coded digital signal into a first analog signal by digital-to-analog conversion; and performing IF signal encoding on the chrominance signal to form a chroma-encoded digital signal;
- the signal is converted to a second analog signal by digital to analog conversion.
- the first analog signal and the second analog signal are sent to the main control board through a conductive slip ring device.
- the first analog signal is subjected to analog-to-digital conversion to be converted into a luminance-encoded digital signal; the luminance-encoded digital signal is decoded to form a luminance digital signal; and the second analog signal is subjected to analog-to-digital conversion.
- the main control board converts the received video analog signal back to the current original video digital signal, the current original video digital signal can be sent to the main processor in the main control board for processing.
- Step 201 Separating, from the encoder, the current original video digital signal acquired by the movement into a luminance signal and a chrominance signal;
- Step 202 After the luminance signal is processed by the digital filter in the encoder, encoding is performed in a baseband manner to form a luminance coded digital signal; and the chrominance signal is subjected to intermediate frequency carrier coding to form a chrominance coded digital signal;
- the movement in the HD camera can continuously acquire high-definition video in digital signal mode. Then, the movement outputs a 16-bit YCbCr format digital signal (original digital signal), and the encoder separates the current original video digital signal into a luminance signal and a chrominance signal, and processes the two signals by analog coding.
- the luminance signal is processed by a digital filter, and then encoded in a baseband manner to form a luminance-encoded digital signal; the chrominance signal is subjected to intermediate frequency carrier coding to form a chrominally encoded digital signal.
- the luminance signal is filtered according to the horizontal resolution of the 15 MHz digital filter, and the 18 MHz intermediate frequency carrier coding method is adopted; Format 25-frame and 30-frame HD video and 720P format 50-frame and 60-frame HD video.
- the luminance signal is filtered according to its horizontal resolution using a 30 MHz digital filter, using a 36 MHz intermediate frequency. The way of carrier coding.
- Step 203 The encoder superimposes the luma coded digital signal and the chroma coded digital signal to form an encoded digital signal, and sends the coded digital signal to the digital-to-analog converter. Specifically, the encoder converts the luma-encoded digital signal and color belonging to the current original video digital signal. The coded digital signals are superimposed to form an encoded digital signal.
- Step 204 The digital-to-analog converter performs digital-to-analog conversion on the received encoded digital signal to form a video analog signal. Specifically, if the digital filter of 15 MHz and the 18 MHz intermediate frequency carrier are selected in step 202, the digital-to-analog converter is used.
- the converted video analog signal can be up to 20MHz. Moreover, it is also possible to control the frequency of the video analog signal by selecting a digital-to-analog converter of different precision.
- Step 205 Send an analog signal to the main control core board through the conductive slip ring device. Specifically, since the frequency of the video analog signal is low, the video analog signal is transmitted by the conductive slip ring device, and is affected by the impedance of the conductive slip ring device. The sound is small and can be neglected under ideal conditions.
- Step 206 The analog-to-digital converter in the main control board performs analog-to-digital conversion on the received video analog signal to obtain an encoded digital signal; where the encoded digital signal is consistent with the encoded digital signal formed in step 203.
- the analog-to-digital converter and the digital-to-analog converter have the same accuracy, which further ensures that the encoded digital signal before the digital-to-analog conversion and the analog-to-digital converted digital signal are identical.
- Step 207 The decoder performs decoding processing on the encoded digital signal, and converts back to the current original video digital signal.
- Step 301 Separating the original digital signal acquired by the movement into a luminance signal and a chrominance signal in the encoder.
- Step 302 After the luminance signal is processed by the digital filter in the encoder, encoding is performed in a baseband manner to form a luminance coded digital number. a signal; performing IF carrier encoding on the chrominance signal to form a chrominally encoded digital signal;
- the movement in the HD camera can continuously acquire high-definition video in digital signal mode. Then, the movement outputs a 16-bit YCbCr format digital signal (original digital signal), and the encoder separates the current original video digital signal into a luminance signal and a chrominance signal, and processes the two signals by analog coding.
- the luminance signal is processed by a digital filter, and then encoded in a baseband manner to form a luminance-encoded digital signal; the chrominance signal is subjected to intermediate frequency carrier coding to form a chrominally encoded digital signal.
- the luminance signal is filtered according to the horizontal resolution of the 15 MHz digital filter, and the 18 MHz intermediate frequency carrier coding method is adopted; Format 25-frame and 30-frame HD video and 720P format 50-frame and 60-frame HD video.
- the luminance signal is filtered according to its horizontal resolution using a 30 MHz digital filter, using a 36 MHz intermediate frequency. The way of carrier coding.
- Step 303 The encoder sends the luma coded digital signal to the first digital to analog converter, and sends the chroma coded digital signal to the second digital to analog converter.
- Step 304 The first digital-to-analog converter converts the luminance-encoded digital signal into a first analog signal; and the second digital-to-analog converter converts the chroma-coded digital signal into a second analog signal;
- Step 305 The first analog signal and the second analog signal are respectively transmitted to the main control board through the conductive slip ring device.
- Step 307 The decoder decodes the luminance coded digital signal to form a luminance digital signal, and decodes the chroma coded digital signal to form a chrominance digital signal.
- Step 308 The decoder superimposes the luminance digital signal and the chrominance digital signal, and converts back to the current original video digital signal.
- Step 309 Send the current original video digital signal to the main processor in the main control board for processing.
- an embodiment of the present invention further provides an apparatus for transmitting a video signal, as shown in FIG. 4, including:
- a separation module 401 configured to separate the current original video digital signal acquired by the movement into a luminance signal and a chrominance signal
- a conversion module 402 configured to convert the luminance signal and the chrominance signal into a video analog signal
- a sending module 403 configured to send the video analog signal to the main control board through a conductive slip ring device; and a restore module 404, configured to convert the video analog signal back to the current original in the main control core board Video digital signal.
- the wear caused by the long-term rotation of the high-rate conductive slip ring device is avoided, resulting in signal instability, and the video analog signal can be further embodied as a low-frequency video analog signal.
- the converting module 402 is configured to perform processing by using a digital filter to form a luma-coded digital signal in a baseband manner; and performing intermediate frequency carrier encoding on the chroma signal to form a chroma encoding.
- Digital signal superimposing the luma coded digital signal and the chroma coded digital signal to form an encoded digital signal, and then converting to a video analog signal by a digital to analog converter.
- the restoration module 404 is specifically configured to convert the received video analog signal into the encoded digital signal by analog-to-digital conversion; decode the encoded digital signal, and convert back to the current original video number. signal.
- the conversion module 402 is configured to perform processing by using a digital filter to form a luminance-encoded digital signal in a baseband manner; and converting the luminance-encoded digital signal into a digital-to-analog converter.
- An analog signal; and, the chrominance signal is subjected to intermediate frequency carrier coding to form a chrominance coded digital signal; and the chrominance coded digital signal is converted into a second analog signal by a digital to analog converter.
- the restoration module 404 is specifically configured to: after the first analog signal is subjected to analog-to-digital conversion, form the luminance-encoded digital signal; and decode the luminance-encoded digital signal to form a luminance digital signal; Converting the second analog signal to the chrominance coded digital signal by analog-to-digital conversion; decoding the chrominance coded digital signal to form a chrominance digital signal; and arranging the luminance digital signal and the chrominance number After the signals are superimposed, they are converted back to the current original video digital signal.
- the device further comprises:
- the processing module 405 is configured to send the current original video digital signal to the main processor in the main control board for processing after the restoration module 404 converts back the current original video digital signal.
- an embodiment of the present invention provides a terminal, including: the foregoing apparatus for transmitting a video signal.
- the main control board converts the video analog signal back to the original video digital signal. Thereby, the integrity of the transmitted video signal can be improved, and the shield of the video signal can be ensured.
- an embodiment of the present invention provides a system for transmitting a video signal.
- the system includes: a movement 501, an encoder 502, a digital-to-analog converter 503, a conductive slip ring device 504, and a master control unit.
- the movement 501 is configured to acquire a current original video digital signal
- the encoder 502 is configured to separate the current original video digital signal acquired by the movement 501 into a luminance signal and a chrominance signal; and convert the luminance signal and the chrominance signal into a video analog signal according to the digital-to-analog converter; Transmitting the video analog signal to the main control board 505 through the conductive slip ring device 504;
- the analog to digital converter 506 and the decoder 507 are located in the main control board 505 for converting the video analog signal back to the current original video digital signal.
- the wear caused by the long-term rotation of the high-rate conductive slip ring device is avoided, resulting in signal instability, and the video analog signal can be further embodied as a low-frequency video analog signal.
- the encoder 502 processes the luminance signals through a digital filter, and performs encoding in a baseband manner to form a luminance-encoded digital signal.
- the chrominance signal is used. Performing intermediate frequency carrier coding to form a chroma coded digital signal; superimposing the luminance signal and the chrominance signal to form an encoded digital signal; and the digital to analog converter 503 converting the encoded digital signal into a video analog signal;
- the encoder processes the luminance signal through a digital filter, and performs coding in a baseband manner to form a luminance code.
- a digital signal converting the luminance coded digital signal into a first analog signal by a first digital to analog converter 5031; and performing intermediate frequency carrier coding on the chrominance signal to form a chrominance coded digital signal;
- the encoded digital signal is converted to a second analog signal by a second digital to analog converter 5032.
- the number of the analog-to-digital converters 506 is the same as the number of the digital-to-analog converters 503, and when the digital-to-analog converter 503 is one, the analog-to-digital converter 506 The number is one, converting the received video analog signal into the encoded digital signal; the decoder 507 performs decoding processing on the encoded digital signal, and converts back to the current original video digital signal;
- An analog-to-digital converter 5061 converts the first analog signal into an analog-coded digital signal, and converts the second analog signal to an analog-to-digital conversion Chromatically encoding a digital signal; said decoder 507 decoding said luma encoded digital signal to form a luma digital signal; decoding said chroma encoded digital signal to form a chroma digital signal; and said luminance digital signal and After the chrominance digital signals are superimposed, they are converted back to the current original video digital signal.
- the system further comprises:
- the main processor after converting the current original video digital signal, sends the current original video digital signal to a main processor in the main control board for processing.
- the method, device, system and terminal for transmitting a video signal are obtained by separating the current original video digital signal into a luminance signal and a chrominance signal, and respectively performing coding, thereby obtaining Video analog signal.
- the video analog signal is transmitted through the conductive slip ring device, although the impedance of the conductive slip ring device is discontinuous, the influence of the video analog signal on the video analog signal is negligible due to the low frequency of the video analog signal.
- the main control board converts the video analog signal back to the original video digital signal. Thereby, the integrity of the transmitted video signal can be improved, and the shield of the video signal can be ensured.
- embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
- computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US14/391,574 US9578297B2 (en) | 2012-05-16 | 2013-05-16 | Video signal transmission method, device, system and terminal |
EP13791567.4A EP2814247B1 (en) | 2012-05-16 | 2013-05-16 | Video signal transmission method, device, system and terminal |
KR1020147035373A KR101659992B1 (ko) | 2012-05-16 | 2013-05-16 | 비디오 신호 전송 방법, 장치, 시스템 및 단말 |
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CN201210156042.5 | 2012-05-16 | ||
CN201210156042.5A CN102724517B (zh) | 2012-05-16 | 2012-05-16 | 一种传输视频信号的方法、装置、系统和终端 |
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US (1) | US9578297B2 (zh) |
EP (1) | EP2814247B1 (zh) |
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CN102724517B (zh) | 2012-05-16 | 2014-06-04 | 浙江大华技术股份有限公司 | 一种传输视频信号的方法、装置、系统和终端 |
CN106131509A (zh) * | 2016-08-25 | 2016-11-16 | 广西小草信息产业有限责任公司 | 一种视频监控系统及其实现方法 |
CN107396096B (zh) * | 2017-08-29 | 2019-03-15 | 中国北方车辆研究所 | 针对导电滑环进行数字视频信号传输性能检测的方法 |
US10756926B2 (en) * | 2018-07-01 | 2020-08-25 | Benchmark Electronics, Inc. | System and method for transmission of video and controller area network (CAN) data over a power slip ring assembly |
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EP2814247B1 (en) | 2020-09-02 |
EP2814247A4 (en) | 2015-11-04 |
EP2814247A1 (en) | 2014-12-17 |
KR101659992B1 (ko) | 2016-09-26 |
CN102724517B (zh) | 2014-06-04 |
US9578297B2 (en) | 2017-02-21 |
KR20150034134A (ko) | 2015-04-02 |
CN102724517A (zh) | 2012-10-10 |
US20150070589A1 (en) | 2015-03-12 |
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