CN113873322A

CN113873322A - Camera adapter and EFP system using same

Info

Publication number: CN113873322A
Application number: CN202111180385.0A
Authority: CN
Inventors: 施肖亮; 李雷波; 章扬
Original assignee: Swit Electronics Co Ltd
Current assignee: Swit Electronics Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2021-12-31

Abstract

The invention discloses a camera adapter, which comprises an FPGA module, an SDI signal module, an NDI signal module, an audio module and a return signal module, wherein the FPGA module is respectively in communication connection with the SDI signal module, the NDI signal module, the audio module and the return signal module, the SDI signal module is used for transmitting video signals of a camera to the FPGA module, the FPGA module processes the video signals to form NDI signals and transmits the NDI signals to the NDI signal module for output, meanwhile, the NDI signal module transmits the received NDI signals to the FPGA module, the FPGA module processes the received NDI signals to form HDMI video signals and voice signals, the HDMI video signals are transmitted to the return signal module, and the voice signals are transmitted to the audio module. The invention also comprises an EFP system adopting the camera adapter, which can process signals such as video, voice, camera control, TALLY and the like to obtain NDI signals and realize stable and reliable local area network communication.

Description

Camera adapter and EFP system using same

Technical Field

The invention belongs to an EFP system in the film and television industry, and particularly relates to a camera adapter and an EFP system adopting the same.

Background

EFP (electronic Field production) and electronic Field program production are used for shooting by a plurality of cameras at a shooting site in multiple angles, connecting real-time signals of all the cameras to a switching station, and switching a video picture of a certain camera within a specific time by a director to form a multi-view switching and vivid video picture for live broadcasting or recording. The cameras that respond to this need are EFP cameras, also known as studio system cameras, which are at a cost of hundreds of thousands or more. The most popular News Gathering camera in tv stations is called ENG (Electronic News Gathering) camera, which is used for single-machine News shooting and storage, and generally has a cost of tens of thousands to hundreds of thousands. In order to save cost, a television station considers whether an ENG camera can be used as an EFP camera or not, and can be used for bearing the production task of partial programs when the program production task in the station is more serious and equipment is in shortage, so that the working pressure of a studio and television relay van equipment in the station is relieved, and the program production task under some special conditions can be completed. An EFP system adapted to the ENG camera, i.e., a device for changing the ENG camera into an EFP camera, was thus born.

As shown in fig. 1, in a conventional EFP system, an optical fiber composite cable or other composite cables are used to transmit an optical fiber signal or other form of signal converted by a camera adapter to a master station, where the optical fiber signal or other form of signal is restored to an SDI (digital component serial interface) signal, and then the signal is sent to a switching station. Taking an optical fiber composite cable as an example, in order to realize optical signal transmission, optical modules which need to be paired inside an adapter and a master station are required, if the optical signal transmission is carried out by four channels, four pairs of optical modules and four optical fiber composite cables are required, and a reliable composite cable interface and other materials are added. In order to reduce the cost of the whole system and the complexity of system construction, a wireless EFP system is developed later, and audio and video signals and some control signals are transmitted between a camera adapter and a main station in a wireless mode, so that the high cost of a composite cable and the complex cable construction work are avoided. However, as is well known, the transmission distance and transmission quality of wireless signals are extremely unstable under the influence of the electromagnetic environment and the natural environment in the field, which is an unacceptable defect for live television programming.

Disclosure of Invention

1. Problems to be solved

The invention provides a camera adapter and an EFP system adopting the same, aiming at the problems of high cost or unstable signal transmission and the like when an ENG camera is used as an EFP camera in the prior art.

2. Technical scheme

In order to solve the problems, the technical scheme adopted by the invention is as follows: the utility model provides a camera adapter, including the FPGA module, the SDI signal module, NDI signal module, audio module and foldback signal module, wherein, the FPGA module respectively with the SDI signal module, NDI signal module, audio module and foldback signal module communication connection, the SDI signal module is used for transmitting the video signal of camera to the FPGA module, the FPGA module is handled video signal and is formed NDI signal transmission and give the output of NDI signal module, NDI signal module transmits the NDI signal of receipt for the FPGA module simultaneously, the FPGA module is handled the NDI signal of receipt and is formed HDMI video signal and speech signal, wherein, HDMI video signal transmission gives foldback signal module, speech signal transmits for the audio module. According to the technical scheme, the video signals can be processed to obtain the NDI signals, namely, signal formats such as SDI and HDMI are converted into the NDI signals, and stable and reliable local area network communication is achieved.

Further, the device also comprises a control signal module, wherein the control signal module is used for outputting a control signal to the camera. The control signal module facilitates adjustment of camera parameters.

Further, the SDI signal module includes an equalizer for receiving the SDI signal and a cable driver for outputting the SDI signal.

Further, the NDI signal module includes a network transceiver for transceiving NDI signals.

The invention also provides a camera adapter, which comprises an adapter main body, wherein an NDI signal interface is arranged on the adapter main body and used for transmitting the NDI signal.

The invention also provides an EFP system, which comprises the camera adapter, a media workstation and more than one camera, wherein the camera is provided with the camera adapter, the camera outputs a video signal to the camera adapter, the NDI signal obtained by processing the video signal by the camera adapter is transmitted to the media workstation, the media workstation outputs the received NDI signal, meanwhile, the media workstation returns the currently played signal to the camera adapter through the format of the NDI signal, and the camera adapter processes the received NDI signal and outputs the processed NDI signal to a machine head monitor of the camera.

The device comprises a camera adapter, a media workstation, a camera, a video camera, a camera adapter and a switch, wherein the switch is in communication connection with the camera adapter, the switch transmits an NDI signal output by the camera adapter to the media workstation, the media workstation sends a currently played signal back to the camera adapter through the switch in an NDI signal format, and the camera adapter processes the received NDI signal and outputs the processed NDI signal to a handpiece monitor. The advantage of utilizing the switch to realize the connection of the director end and the camera end lies in that the setting of the whole EFP system can be more convenient, the quantity of the cameras can be expanded at will, and the switch is utilized, so that the conversation between the director end and the camera end can be conveniently realized, and the media workstation and the main station of the director end can also be communicated in real time.

And the camera controller is in communication connection with the media workstation and outputs a control signal to control the camera to adjust parameters through the media workstation.

The system further comprises a master station, wherein the master station is in communication connection with the camera, and voice signals are transmitted between the camera and the master station.

Further, the system also comprises a director end monitor, and the director end monitor receives and displays the NDI signals sent by the camera adapter.

3. Advantageous effects

Compared with the prior art, the invention has the beneficial effects that:

(1) the whole EFP system is simple to build, the camera end adapter, the director end master station, the media workstation or the switching station form a local area network by using the switch through network cables, and the cost is saved;

(2) the adapter can convert SDI, voice, TALLY and other signal formats into IP network signals, namely NDI signals, and realizes stable and reliable local area network communication;

(3) the video manufactured by the EFP is in an NDI format, so that the video can be uploaded to an Internet platform quickly, the efficiency is improved, and meanwhile, the video access system of an external mobile terminal user is facilitated.

(4) The invention can realize IP of the whole EFP system program production, and is suitable for the requirement of modern media integration

Drawings

FIG. 1 is a prior art EFP system block diagram;

FIG. 2 is a schematic block diagram of embodiment 1 of an adapter in the present invention;

FIG. 3 is a schematic block diagram of embodiment 2 of an adapter in the present invention;

FIG. 4 is a perspective view of an adapter construction of the present invention;

FIG. 5 is a right side view of the adapter of the present invention;

FIG. 6 is a bottom view of the adapter of the present invention;

FIG. 7 is a wiring diagram of a camera side adapter according to the present invention;

FIG. 8 is another side view of FIG. 7;

FIG. 9 is a schematic view of the tripod mounting of the adapter and camera of the present invention;

FIG. 10 is a schematic view of the installation of the adapter and dual collet connector of the present invention;

FIG. 11 is a functional block diagram of a master station in the present invention;

FIG. 12 is a perspective view of the master station of the present invention;

FIG. 13 is a schematic view of a master station back panel in the present invention;

FIG. 14 is a block diagram of embodiment 1 of an EFP system of the present invention;

FIG. 15 is a block diagram of an EFP system embodiment 2 of the present invention (the director does not contain a master station, a director monitor and a camera controller);

fig. 16 is a block diagram of embodiment 2 in an EFP system of the present invention (the director includes a master station, a director monitor, and a camera controller).

In the figure: 1: a return signal output interface; 2: a video signal input interface; 3: a video signal output interface; 4: a control interface; 5: a DC power interface; 6: an NDI signal interface; 7: a battery buckle plate; 8: a TALLY signal interface; 9: a power switch; 10: returning a switch key; 11: a volume up key; 12: a volume down key; 13: a headset interface; 14: mounting a fixing hole; 15: an SDI output interface; 16: a control input interface; 17: an HMDI cable; 18: a BNC cable; 20: a control cable; 21: a TALLY connecting line; 22: a TALLY patch cord; 23: a handpiece monitor; 2301: a first head monitor; 2302: a second head monitor; 2303: a third head monitor; 2304: a fourth head monitor; 24: a TALLY indicator light; 25: a camera; 2501: a first camera; 2502: a second camera; 2503: a third camera; 2504: a fourth camera; 26: tripod: 27: a holder pipe clamp; 28: a guide rail; 29: a dual tube clamp connector; 31: a threaded hole; 32: a guide rail hole; 33: a wrench; 34: a microphone interface; 35: an audio mode selection key; 36: a master station headset interface; 37: a bell mouth; 38: a volume selection key; 39: an ANN broadcast key; 40: MIC OFF microphone mute key; 41: MUTE MUTE key; 42: a channel selection key; 43: a power switch key; 44: an AC power input terminal; 45: a DC power input port; 46: external audio interface, 47: a master NDI signal interface; 49: a headset; 4901: a first headset; 4902: a second headset; 4903: a third headset; 4904: a fourth headset; 100: an adapter; 101: a first adapter; 102: a second adapter; 103: a third adapter; 104: a fourth adapter; 200: a master station; 300: a switch; 500: a camera controller; 600: an NDI monitor; 700: a media workstation.

Detailed Description

The invention is further described with reference to specific examples.

Adapter embodiment 1

The present invention includes an adapter 100, as shown in fig. 2, the adapter 100 including: the device comprises an SDI signal module, an NDI signal module, a return signal module, an audio module, a control signal module and an FPGA module. The FPGA module is respectively in communication connection with the SDI signal module, the NDI signal module, the audio module and the return signal module, the SDI signal module is used for transmitting video signals of the camera to the FPGA module, the FPGA module processes the video signals to form NDI signals and transmits the NDI signals to the NDI signal module for output, meanwhile, the NDI signal module transmits received NDI signals of a broadcasting guide end to the FPGA module, the FPGA module processes the received NDI signals to form HDMI (High-Definition Multimedia Interface) video signals and voice signals used for realizing communication between the broadcasting guide end and the camera end, the HDMI video signals return the signal module, and the voice signals are transmitted to the audio module.

The function of each module is described below, the SDI signal module is used for receiving and outputting camera video signals, specifically including an equalizer for receiving SDI signals and a cable driver for outputting SDI signals, and a video signal input interface SDI IN and a video signal output interface SDI OUT, the equalizer is connected to the video signal input interface SDI IN, the SDI signals received are transmitted to the FPGA module on the one hand, and simultaneously the SDI signals are also transmitted to the cable driver, and the cable driver outputs the SDI signals through the video signal output interface SDI OUT.

The NDI signal module is used for transmitting NDI signals and specifically comprises a network transceiver and a network signal interface NDI, signal bidirectional transmission is realized between the network transceiver and the FPGA module, and then the NDI signals are input or output through the network signal interface NDI. Typically for 3GSDI or 12GSDI camera signals, gigabit network transceivers are required. Ndi (network Device interface), is an IP network Device interface protocol. After NDI coding, the video signal and the voice signal can be converted into NDI signals to be transmitted in the local area network.

The return signal module is used for outputting return signals of the switching station of the director terminal, and specifically comprises an HDMI transmitter, wherein the HDMI transmitter is used for converting serial signals obtained by decoding return video signals received by a network interface NDI through an FPGA into parallel signals, and the HDMI transmitter outputs the converted signals through a return signal output interface HDMI OUT. In this embodiment, the foldback signal is in HDMI format.

The audio module is used for communicating with the broadcasting terminal, and specifically comprises an audio codec, a power amplifier for the output of a headset earphone, an amplifier for the input of a headset microphone, and an audio interface headset, wherein the audio codec is in bidirectional communication with the FPGA module, the audio codec transmits a received voice signal to the headset through the power amplifier, and the microphone inputs the voice signal to the audio codec through the amplifier.

The control signal module is used for outputting a control signal transmitted by the switching station of the director terminal to the camera, and particularly comprises a control interface CAM REMOTE, as the control interface of the camera is generally in a RS422 form, the control interface of the camera also generally comprises a receiving and transmitting chip of RS422, and the receiving and transmitting chip of RS422 receives signals of the FPGA and transmits the signals to the control interface CAM REMOTE. It should be noted that, for the adapter 100, the control signal module is only for the convenience of the director controlling the camera, and is not necessary.

The FPGA module is used to implement signal conversion and processing, including converting voice signals and SDI signals into NDI signals, converting NDI signals into HDMI signals and voice signals, and so on.

In a specific implementation, the adaptor 100 further includes an indicator Light signal interface TALLY and a key, where the indicator Light signal interface TALLY is used to output a TALLY signal transmitted by the switching station at the broadcaster end, and in the studio system, TALLY refers to TALLY Light, i.e. an indicator Light, which is a Light used to indicate a currently played picture and a picture to be played. The keys are used for realizing adjustment control, and generally need to comprise volume increasing and decreasing keys and a return signal switch or a mode selection key for displaying return signals, and generally are in picture-in-picture or picture-outside-picture display modes.

Fig. 4, 5, and 6 show specific structures of the adapter 100, and a surface B on the left side of the adapter is provided with a plurality of interfaces, including a return signal output interface 1, a video signal input interface 2, a video signal output interface 3, a control interface 4, a DC power interface 5, and an NDI signal interface 6. A TALLY signal interface 8, a power switch 9, a return switch key 10, an earphone interface 13 and volume adjusting keys are arranged on the right side surface C of the adapter 100, and in the specific implementation, the volume adjusting keys include a volume increasing key 11 and a volume decreasing key 12. The bottom surface D of the adapter 100 is provided with a plurality of mounting holes 14 for mounting the adapter 100 to a tripod, and in particular, the top of the adapter 100 may also be provided with threaded mounting holes for mounting a monitor or other device to the top of the adapter 100 through the threaded holes. The back surface A of the adapter 100 is provided with a battery buckle plate 7 for mounting a camera battery to supply power to the adapter 100.

Adapter embodiment 2

As shown in fig. 3, the other parts of this embodiment are the same as those of embodiment 1, and the difference is only that the audio module and the return signal module are different, the audio module in this embodiment includes an audio codec and a headset, a power amplifier or an amplifier is integrated in the audio codec in this embodiment, and the audio codec can be directly connected to the audio interface headset; the foldback signal module in this embodiment includes SDI cable driver and SDI foldback signal output interface RETURN OUT, and the SDI cable driver is used for outputting the foldback signal that FPGA decoded and is the SDI signal form.

EFP System embodiment 1

The invention also comprises an EFP system, which adopts the ENG camera and the adapter 100 in the invention to solve the problems of high cost, unstable signal transmission and the like when the ENG camera is used as the EFP camera in the prior art. Fig. 7 and 8 show the connection relationship of the video transmission system, the SDI output interface 15 of the camera 25 inputs the camera video signal to the video signal input interface 2 of the adaptor 100 through the BNC cable 18, the video signal output interface 3 of the adaptor 100 is connected to the SDI signal input port of the head monitor 23 (also called head monitor, which is a small monitor mounted on a camera) through the BNC cable 18, and the camera video signal received by the adaptor 100 through the video signal input interface 2 is output to the head monitor 23 for the monitor of the camera-end photographer. The foldback signal output interface 1 of the adapter 100 is connected to the HDMI signal input port of the head monitor 23 through the HDMI cable 17, and outputs the director-side foldback signal received by the adapter 100 through the NDI signal interface 6 to the head monitor 23 for the monitoring of the camera-side photographer. The control interface 4 of the adaptor 100 is connected to the control input interface 16 of the camera 25 via the control cable 20, the director end control signal received by the adaptor 100 via the NDI signal interface 6 is output to the camera 25, and the camera 25 adjusts its parameters, including color gain, aperture, etc., according to the received control signal. The NDI signal interface 6 of the adapter 100 receives the TALLY signal of the director terminal, and then outputs the TALLY signal through the TALLY signal interface 8, and when the TALLY signal is specifically output, there are two connection modes, the first is to connect the TALLY signal interface 8 of the adapter 100 to the TALLY signal input port of the machine head monitor 23 through the TALLY patch cord 22, and display the TALLY signal on the machine head monitor 23; secondly, the TALLY signal interface 8 of the adapter 100 is connected to the TALLY indicator lamp 24 through the TALLY connecting line 21, and the TALLY indicator lamp 24 is used for displaying the TALLY signal.

As shown in fig. 9 and 10, an adapter 100 is provided, which is first connected to the adapter 100 by using a double pipe clamp connector 29, and as shown in fig. 10, a screw hole 31 of the double pipe clamp connector and a mounting hole 14 of the adapter 100 are connected together by using a screw. As shown in fig. 9, the guide holes 32 in the double tube clamp connector are threaded through the guide rail 28 and tightened with a wrench 33. The guide rail 28 is mounted on the pan head of the tripod 26 via a pan head pipe clamp 27, and the camera 25 is mounted on the pan head pipe clamp 27. The head monitor 23 may optionally be mounted on a threaded mounting hole in the top of the camera 25 or adapter 100.

In the EFP system, main website 200 establishes at the director end, and mainly used realizes the real-time conversation between the cameraman of director and camera end, utilizes the conversation function of main website 200, and the director end can effectively converse with the camera end, need not extra equipment moreover, and the interference killing feature is strong. The master station 200 shown in fig. 11 includes: the system comprises a main station FPGA module, an NDI signal module and an audio module, wherein the NDI signal module is used for transmitting an NDI signal and specifically comprises a network transceiver and a network signal interface NDI; the audio module is used for communicating with the camera end, and specifically comprises an audio codec, a power amplifier for outputting of an earphone or a loudspeaker, an amplifier for an earphone or a microphone and an external audio interface for accessing external audio, wherein during specific implementation, the microphone can be a gooseneck microphone. The input and output modes of the audio can be selected, and the input and output of the headset, the output of the loudspeaker and the input of the microphone can be determined through key selection. The keys for implementing the adjustment control generally need to include volume up and down keys, an audio mode selection key, and a talk channel selection key. And the master station FPGA module is used for realizing master station signal conversion and processing. In specific implementation, the master station 200 transmits the voice signal to the camera adapter through the NDI signal, so as to realize real-time communication between the director end and the camera end.

The main station 200 shown in fig. 12 and 13 is used at the director end, and the use scene is generally a director car or a field director console, and generally needs to be installed on a rack, so the structural appearance is a standard case of 1U. The front panel E of the master station 200 is provided with a microphone interface 34, an audio mode selection key 35, a master station headset interface 36, a horn 37, a volume selection key 38, an ANN broadcast key 39, an MIC OFF microphone MUTE key 40, a MUTE by MUTE key 41, a channel selection key 42, and a power switch key 43. The audio mode selection key 35 is used for selecting an audio input and output mode, the ANN broadcast key 39 is used for realizing a function of simultaneously communicating with all channels, the MIC OFF microphone MUTE key 40 is used for turning OFF the headset microphone of the master station headset interface 36, the MUTE key 41 is used for turning OFF the headset microphone of the headset interface 13 of the all-channel camera terminal adapter 100, the channel selection key 42 comprises channel serial numbers from 1 to 8, and the corresponding channel key is pressed when communication is needed. The main station 200 is provided with an AC power input 44, a DC power input 45, an external audio interface 46, and an NDI signal interface 47 on the surface F of the rear panel.

Fig. 14 shows a large-scale EFP system, which in this embodiment includes a camera end and a director end, the camera end has a plurality of cameras (it should be noted that the number of cameras in the present invention refers to two cameras and above), that is, in a large-scale activity, a plurality of machine positions are required, each machine position is provided with a camera, each camera is provided with a camera adapter, the cameras in fig. 14 include four cameras, namely a first camera 2501, a second camera 2502, a third camera 2503 and a fourth camera 2504, corresponding adapters paired with the respective cameras are a first camera adapter 101, a second camera adapter 102, a third camera adapter 103 and a fourth camera adapter 104, and the machine monitors installed on the respective cameras are also four cameras, namely a first machine monitor 2301, a second machine monitor 2302, a first machine monitor 2302, a second machine monitor, Third handpiece monitor 2303 and fourth handpiece monitor 2304, and likewise, four headsets communicatively coupled to respective camera adapters, first headset 4901, second headset 4902, third headset 4903 and fourth headset 4904. It should be noted that, in the implementation, the number of cameras is not fixed, and may be set up specifically according to the specific situation, and a large-scale EFP system generally includes at least two cameras, and accordingly, each camera includes a camera adapter and a handpiece monitor, and each camera adapter is equipped with a headset.

In the embodiment of fig. 14, the first camera 2501, the second camera 2502, the third camera 2503, and the fourth camera 2504 respectively communicate with the director terminal through the switch 300, the director terminal includes a director terminal monitor 600, a master station 200, and a media workstation 700, the director terminal monitor 600, the master station 200, and the media workstation 700 are respectively in communication connection with the camera adapter 100 through the switch 300, wherein the camera signals are transmitted to the director terminal monitor 600 and displayed on the director terminal monitor 600, so that the director can watch real-time pictures and currently broadcasted pictures taken by each channel in time; the master station 200 and the camera end are in bidirectional communication through the switch 300, so that real-time communication between the director end and the camera end is realized; the media workstation 700 and the camera end are in two-way communication through the switch 300, on one hand, a camera signal is transmitted to the media workstation 700, a director switches the signal by using the media workstation 700 and selects a picture shot by a proper machine position to be played, and on the other hand, the currently played signal is returned to the camera end by the media workstation 700 and is displayed on the machine head monitor 23 of the camera end, so that a photographer can master the currently played picture in time. In one embodiment, to better control the camera, a camera controller 500 may be further included, the camera controller 500 is communicatively connected to the media workstation 700, and the camera controller 500 outputs a control signal to the media workstation 700.

In the concrete implementation, the switch 300 may be omitted, that is, the camera adapter 100 may be directly communicatively connected to the media workstation 700 at the director, the director monitor 600, and the master station 200 without using the switch 300. The benefits of using the switch 300 are: the setting of the whole EFP system can be more flexible and convenient, the number of the cameras can be freely expanded, and the communication between the director end and the camera end can be conveniently realized by utilizing the switch 300. While omitting the switch 300 makes the entire EFP system somewhat more complex to route.

In this embodiment, the communication between the director end and the camera end is performed through an NDI protocol, that is, the signals transmitted by the camera end and the director end are NDI signals

Fig. 14 is a block diagram of a 4-channel NDI EFP system, where the camera 25 at the camera end is connected to the adapter 100, the headset 49 is connected to the headset interface 13 of the adapter 100, and one end of the gigabit cable is connected to the NDI signal interface 6 of the adapter 100, according to fig. 7. The other end of the gigabit network line for channel 1, channel 2, channel 3, and channel 4 is connected at the network interface of switch 300. At the director end, the NDI signal interface 47 of the master station 200 is connected to the network interface of the switch 300 via a gigabit cable, and the headset 49 is connected to the headset interface 36 of the master station 200, or the microphone is connected to the microphone interface 34 of the master station 200, so that the camera-end cameraman can implement a real-time call function with the director end. In order to realize the director watch, a director monitor 600 is also typically provided at the director end for monitoring the camera signals of the 4 channels. The director monitor 600 may directly select the NDI monitor, and the NDI interface of the director monitor 600 is connected to the network interface of the switch through the gigabit network cable, or may use a normal monitor to access the signal through the NDI signal conversion box. The important device media workstation 700 at the director end, where the media workstation 700 functions like a switching desk in the conventional EFP system of fig. 1, is different in that the media workstation 700 in this embodiment is an NDI switch with an NDI signal interface, such as tricoster mini multimedia integrated system of NewTek official, and by using its powerful software functions, it can quickly implement multiple functional effects such as signal switching, mixing effect, virtual scene, matting, caption, talely signal, etc. on a computer. In order to facilitate the director control, the director sometimes accesses the camera controller 500, so that the director can directly control parameters such as aperture, color gain and the like of the camera at the camera end.

EFP System embodiment 2

As shown in fig. 15, this embodiment is a simplest NDI broadcast guide system, and includes only one machine position, that is, only one camera 25, one camera adapter 100 and one machine head monitor 23, where the camera 25 is communicatively connected to the camera adapter 100, the camera adapter 100 is communicatively connected to a media workstation 700 at the broadcast guide end, the camera 25 transmits an SDI signal to the camera adapter 100, the camera adapter 100 processes the SDI signal to obtain an NDI signal, and outputs the NDI signal to the media workstation 700 at the broadcast guide end, the media workstation 700 transmits the sent NDI signal to the camera adapter 100, the camera adapter 100 processes the received NDI signal to obtain an HDMI signal and transmits the HDMI signal to the machine head monitor 23, and the machine head monitor 23 displays a currently played picture.

In specific implementation, as shown in fig. 16, in order to facilitate a call between the director end and the camera end, a director end monitor 600, a master station 200, and a media workstation 700 may be further provided, for this purpose, a switch 300 may be provided between the director end and the camera end, a camera 25 is provided with a camera adapter 100, the camera adapter 100 is in communication connection with the switch 300, the switch 300 is in communication connection with the director monitor 600, the master station 200, and the media workstation 700 at the director end, respectively, and the media workstation 700 is further in communication connection with the camera controller 500 to receive a control signal output by the camera controller 500. Of course, the switch 300 may be omitted and the camera adapter 100 may be directly connected to the director monitor 600, the master station 200, and the media workstation 700, respectively, for communication.

The specific signal transmission process is as follows: the camera transmits an SDI signal to the camera adapter 100, the camera adapter 100 processes the SDI signal to obtain an NDI signal and outputs the NDI signal to the switch 300, and the switch 300 transmits the signal to the director monitor 600 so as to display a broadcasted picture on the director monitor 600 in real time; the master station 200 and the camera end are in bidirectional communication through the switch 300, so that real-time communication between the director end and the camera end is realized; the media workstation 700 and the camera end are in two-way communication through the switch 300, on one hand, a camera signal is transmitted to the media workstation 700, and on the other hand, the currently played signal is returned to the camera end by the media workstation 700 and displayed on the camera end monitor 23, so that a cameraman can master the currently played picture in time. In one embodiment, to better control the camera, a camera controller 500 may be further included, the camera controller 500 is communicatively connected to the media workstation 700, and the camera controller 500 outputs a control signal to the media workstation 700.

Claims

1. A camera adapter, characterized by: including the FPGA module, SDI signal module, NDI signal module, audio module and return signal module, wherein, the FPGA module respectively with SDI signal module, NDI signal module, audio module and return signal module communication connection, SDI signal module is used for transmitting the video signal of camera for the FPGA module, the FPGA module handles video signal and forms the NDI signal transmission and give the output of NDI signal module, NDI signal module transmits the NDI signal of receipt for the FPGA module simultaneously, the FPGA module handles the NDI signal of receipt and forms HDMI video signal and speech signal, wherein, HDMI video signal transmits and returns signal module, speech signal transmits for the audio module.

2. The camera adapter according to claim 1, wherein: the camera also comprises a control signal module, wherein the control signal module is used for outputting a control signal to the camera.

3. The camera adapter according to claim 1 or 2, characterized in that: the SDI signal module includes an equalizer for receiving the SDI signal and a cable driver for outputting the SDI signal.

4. The camera adapter according to claim 1 or 2, characterized in that: the NDI signal module includes a network transceiver for transceiving NDI signals.

5. A camera adapter, characterized by: the NDI signal interface is arranged on the adapter main body and used for transmitting NDI signals.

6. An EFP system, comprising: the camera adapter of any one of claims 1 to 5, further comprising a media workstation and more than one camera, wherein the camera is provided with the camera adapter, the camera outputs a video signal to the camera adapter, the camera adapter processes the video signal to obtain an NDI signal, the NDI signal is transmitted to the media workstation, the media workstation outputs the received NDI signal, the media workstation simultaneously returns a currently played signal to the camera adapter through the format of the NDI signal, and the camera adapter processes the received NDI signal and outputs the processed NDI signal to a machine head monitor of the camera.

7. The EFP system of claim 6, wherein: the device comprises a camera adapter, a media workstation, a camera adapter and a switch, wherein the switch is in communication connection with the camera adapter, the switch transmits an NDI signal output by the camera adapter to the media workstation, the media workstation sends a currently played signal back to the camera adapter through the switch in an NDI signal format, and the camera adapter processes the received NDI signal and outputs the NDI signal to a handpiece monitor.

8. The EFP system of claim 6 or 7, wherein: the system also comprises a camera controller, wherein the camera controller is in communication connection with the media workstation and outputs control signals to control the camera to adjust parameters through the media workstation.

9. The EFP system of claim 6 or 7, wherein: still include the master station, master station and camera adapter communication connection, the transmission speech signal between camera adapter and the master station.

10. The EFP system of claim 6 or 7, wherein: the system also comprises a director end monitor, and the director end monitor receives and displays the NDI signal sent by the camera adapter.