CN112911333B - Information display system and method based on transparent OLED - Google Patents

Information display system and method based on transparent OLED Download PDF

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CN112911333B
CN112911333B CN202110080196.XA CN202110080196A CN112911333B CN 112911333 B CN112911333 B CN 112911333B CN 202110080196 A CN202110080196 A CN 202110080196A CN 112911333 B CN112911333 B CN 112911333B
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playing
escalator
content
video content
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CN112911333A (en
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胡伟
赵哲
吴寅
李淼
代晋
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Zxtech Shanghai Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/233—Processing of audio elementary streams
    • H04N21/2335—Processing of audio elementary streams involving reformatting operations of audio signals, e.g. by converting from one coding standard to another
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41415—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance involving a public display, viewable by several users in a public space outside their home, e.g. movie theatre, information kiosk
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams
    • H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/44016—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for substituting a video clip
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6405—Multicasting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Marketing (AREA)
  • Databases & Information Systems (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The invention belongs to the field of sound images, and particularly relates to an information display system and method based on a transparent OLED. The method comprises the following steps: the system comprises a central controller, a playing node controller, an OLED display panel and a wireless access receiver; the central controller realizes wireless communication with the playing node device through the wireless access receiver, and is arranged in the coverage range of the wireless access receiver; the number of the playing node controllers is multiple, each playing node controller is provided with a loudspeaker, the playing node controllers are linearly arranged along the running direction of the escalator, are symmetrically arranged on outer cover plates on two sides of the escalator and are connected with an OLED display panel through FCP flat cables, and the OLED display panel is attached to outer escalator glass; the wireless access receiver is arranged above the midpoint of the center line of the escalator in the running direction. The escalator is little in transformation, low-power consumption equipment is applied, the cost is reduced, and the energy consumption is saved; the problem of because of after staircase and the slope of staircase handrail installation display, image level broadcast is solved.

Description

Information display system and method based on transparent OLED
Technical Field
The invention belongs to the field of sound images, and particularly relates to an information display system and method based on a transparent OLED.
Background
The elevator video media display and publicity is that the elevator media advertisement is put in a vertical elevator system, and a small-size liquid crystal display is arranged on the side wall of a car to play audio and video advertisements. Many in house and office, personnel are relatively fixed, influence scope is less, and the cost of straight ladder single ladder media show is less, but the quantity is huge, and cost and quantity linear proportion need carry out extensive media propaganda and put into very much, and the staircase has the application environment difference with the straight ladder, and its self characteristic "commercial place" and "people flow" make it become more ideal media show platform. Compared with a straight elevator, the floors of elevator taking personnel of the straight elevator are different, the time for receiving media content and transmitting cannot be determined, and the media content or the advertisement content cannot be completely output. When all the personnel taking the staircase are static, the receiving time and the transferring time of the media content are uniform, the comprehensive staircase has larger carrying capacity and slower speed, is applied to the factors of people flow concentration and the like, and the media transferring efficiency of a single staircase has a very high multiple compared with that of a straight staircase.
The escalator has no audio/video media display scheme which can be widely applied due to the structure. The diversity and complexity of modern media display contents, the simple static image-text media display and transmission efficiency is low, the contents are inconvenient to update, and the requirements of the times cannot be met, so that audio and video multimedia content display on the escalator is necessary, and long-time and directional media content output following the movement of personnel is also necessary.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an information display system and method based on a transparent OLED (organic light emitting diode), which are used for solving the problem that audio and video multimedia information cannot be efficiently displayed on an escalator and solving the problem that video content, sound and passengers synchronously move to follow and play on the escalator.
The technical scheme adopted by the invention for realizing the purpose is as follows: the utility model provides an information display system based on transparent OLED, locates on the staircase, includes: the system comprises a central controller, a playing node controller, an OLED display panel and a wireless access receiver;
the central controller is in wireless communication with the playing node device through the wireless access receiver and is used for processing the acquired original video content and sending the processed video content and a playing control instruction generated by the central controller to the playing node controller through the wireless access receiver, and the central controller is arranged in the coverage range of the wireless access receiver;
the plurality of playing node controllers are provided, each playing node controller is provided with a loudspeaker, the playing node controllers are linearly arranged along the running direction of the escalator, are symmetrically arranged on the outer cover plates on the two sides of the escalator and are connected with the OLED display panel through FCP (fiber channel protocol) flat cables, and are used for converting received playing control instructions into corresponding video contents and sending the video contents to the corresponding OLED display panel;
the OLED display panel is attached to the outer side escalator glass and used for playing the video content output by the playing node controller;
the wireless access receiver is arranged at the midpoint of the central line of the escalator in the running direction, and all the play node controllers above the wireless access receiver for constructing the network can receive data sent by the central controller.
The playing control instruction comprises a playing video name and a basic frame number; the basic frame number is the current frame number when the playing video is played on a single OLED display panel, namely F (server) 。
The central controller includes: a Linux operation layer, a basic function service layer and an application processing layer from bottom to top;
the Linux operating layer is arranged on the bottom layer and used for providing hardware IO;
the basic function service layer is arranged on the middle layer and comprises: the communication basic program library and the audio and video processing basic program library of the application processing layer comprise a transparent channel processing basic program library;
the application processing layer is arranged on the upper layer and used for determining a playing control instruction corresponding to the playing node controller and sending the playing control instruction and the processed video content to the wireless access receiver through the communication module;
the application processing layer comprises: the system comprises a playing content processing module, a playing node management module, a content distribution module and a playing control module;
the playing content processing module is used for carrying out transparent channel processing on the original video content through a transparent channel processing basic program library, and sending the processed video content to the content distribution module after picture angle rotation processing and size amplification processing so as to realize playing on the OLED display panel with the same inclination angle as the escalator;
the playing node management module is used for recording the IP address and the physical arrangement position information of each playing node controller, the IP address is used for network communication, so that the central controller sends playing control instructions to the playing node controllers in a broadcasting mode or a directional mode,
the content distribution module is used for recording the IP address and the physical arrangement position information of each playing node controller through the playing node management module and sending a processed specified video content file to a certain playing node controller within the network coverage range of the formed central controller in a broadcasting mode or a directional mode; the data sent by the content distribution module is received by the playing node controller;
and the playing control module is used for sending playing control instructions to each playing node controller.
A display method of an information display system based on a transparent OLED is characterized by comprising the following steps:
1) Sending the video content to be played and the escalator operation parameters to a central controller, and judging whether the video content is transparent channel video content or not by the central controller;
the escalator operating parameters include: staircase inclination angle, staircase direction of operation, staircase operating speed.
If the video content does not have the video content of the transparent channel, an application processing layer in the central controller processes the transparent channel of the video content according to a transparent channel processing basic program library and then performs horizontal correction and amplification processing on the video content according to an audio and video processing basic library; otherwise, the horizontal correction and the amplification processing are directly carried out through an application processing layer in the central controller;
2) After the playing content processing module of the central controller processes the video content, generating video content which uses a playing control instruction to realize that the picture content crosses the screen in the OLED in the left or right direction and has the same direction and speed as the escalator;
3) The content distribution module of the central controller transmits the processed video content to all the playing node controls in a broadcast manner through the wireless access receiver, and the processed video content is received by the playing node controls and stored on the playing node controls;
4) The wireless access receiver sends the central controller playing control instruction to the corresponding playing node controller, and the playing node controller acquires the frame number of the video content to be played at the same moment of each OLED panel according to the basic frame number of the playing control instruction and the physical sequence position information of the playing node controller, and plays the frame.
The method for horizontally correcting and amplifying the video content relative to the escalator glass through the audio and video processing module in the central controller comprises the following steps:
1) Rotating the original video content by taking a geometric central point of a display picture as a center through OpenCV;
2) Under the condition that the left side and the right side of the escalator are provided with OLED panels, the OLED display panels on the two sides are opposite in front, video processing at different angles is carried out on film sources, and four target processing files are output, namely: an uplink left video, an uplink right video, a downlink left video and a downlink right video;
3) Processing angles are processed by adopting standard polar coordinates, the upward left video content deflection angle is an escalator inclination angle alpha, the upward right video content deflection angle is an escalator inclination angle 360-alpha, the downward left video content deflection angle is an escalator inclination angle alpha, and the downward right video content deflection angle is an escalator inclination angle 360-alpha;
4) After the video content frame is rotated, amplifying the image through FFmpeg to cover blank pixel points, wherein the image amplification factor is as follows:
Figure BDA0002908933450000041
wherein, alpha is the inclined angle of the escalator, h is the height of the OLED display panel, and w is the width of the OLED display panel.
The playing content processing module in step 2) processes the video content, including: the playing content processing module in the central controller divides the video content into two modes, namely a single media content mode and a plurality of media content modes.
The single media content mode includes the following steps:
when the required video content is in a single media content mode, namely the same video content moving towards the ascending direction or the descending direction of the escalator is displayed in a plurality of displays, the space of the display content is equal to q x the space of the outer contour of a single OLED display panel; q is the number of OLED display panels on one side of the escalator;
a. the number of cycle frames in the OLED display panel is expressed as:
Figure BDA0002908933450000042
wherein L is the width of the OLED display panel, V is the speed of the escalator, F is the frame rate, and F is the frame rate (loop) The number of cycle frames;
b. the number of pixels moved per frame is expressed as:
F p ＝F (loop) ÷P x (2)
wherein, P x The number of horizontal single-line pixels of a single screen;
substituting equation (2) into equation (1) yields the number of pixels moved per frame:
Figure BDA0002908933450000051
c. the video which is arranged on the left side of the escalator and moves upwards or downwards at the right side of the escalator uses the following formula to process the displacement of the video:
x＝(nmodF (loop) )×F p
wherein mod is a remainder function, and n is a frame number range from 0 to a total frame number F of the video (all) Current frame number, x is the pixel point position to be moved to, F p Moving the number of pixels per frame;
d. then moving the video pixel points, and processing the displacement of the video by using the following formula for the video which is arranged on the right side of the escalator and goes upward or the left side of the escalator and goes downward:
x＝P x -(nmodF (loop) )×F p
e. moving the video pixel points, when the total frame number is F (all) Number of frames F that cannot be cycled (loop) And supplementing the frame number when dividing the video into whole frames, wherein the displacement value of each video in the screen linear array is the same, and the supplemented frame number is as follows:
F (fill) ＝F (loop) -(F (all) mod F (loop) )；
the number of the supplementary frames is completed in the playing processing module of the central controller, and F of the original video is processed according to the amplified video (all) Frame video plus F (fill) Frame transparent blank view composition can be F (loop) New video for the integer division, i.e.: f (All) ＝F (all) +F (fill) And will new video file F (All) Sending to a playing node controller for storage;
the plurality of media content modes comprising the steps of:
when the required video content is a plurality of media video contents, namely the plurality of video contents are synthesized into one video content which is played in the OLED display panel array according to the sequence and synchronously moves with the escalator, a single video uses a single media content mode to supplement the frame number, all the supplemented single video contents are synthesized into a new video file according to the sequence, and the new video file is sent to the node player to be stored, then: first, theThe number of video frames played by 1 playing node controller is: 0 to F (All) N frames; the number of video frames played by the mth playing node controller is: f (All) ÷m×(m-1)～F (All) 。
The playing content processing module of the central controller simulates the movement of a sound source in space by using the Doppler effect to realize the effect of synchronous motion of audio and video, and in the video processing on the left side of the escalator, the amplitude of the sound source processing at the position of a pixel x is processed according to the following modes:
0 to
Figure BDA0002908933450000061
And for a frame, on the unilateral escalator, in any two adjacent loudspeakers, the amplitude coefficient of the front loudspeaker is as follows:
Figure BDA0002908933450000062
amplitude coefficient of the latter speaker:
Figure BDA0002908933450000063
Figure BDA0002908933450000064
to P x Frame, for a unilateral escalator, in any two adjacent loudspeakers, the amplitude coefficient of the front loudspeaker is:
Figure BDA0002908933450000065
amplitude coefficient of the latter speaker:
Figure BDA0002908933450000066
number of pixels moved per frame:
Figure BDA0002908933450000067
frame number range (x-1) F when moving image x pixels p To x F p And frame, multiplying the amplitude of the original audio in the range by an amplitude coefficient to obtain a new audio with the amplified and reduced volume: for a unilateral escalator, the front loudspeaker in any two adjacent loudspeakers is in accordance with the amplitude coefficient
Figure BDA0002908933450000068
Amplification, the amplitude factor of the latter loudspeaker
Figure BDA0002908933450000069
And reducing to form a simulation of the motion of the sound source so as to realize the effect of synchronous motion of sound and images in the linear display array.
In the step 4), the method specifically comprises the following steps:
the spatial positions and the play frame numbers on different play node controllers meet the following relation, and the play node controller array on the left side of the escalator meets the following conditions:
F (client) ＝m×F (loop) +F (server)
wherein m is a serial number of the playing node controllers which are connected in the physical space sequence, the serial number is from left to right or from right to left, F (client) For the frame number, F, that the node controller should play (server) Basic frame number, F, issued for central controller (loop) Cyclic frame number for video file, ranging from 0 to F (loop) To (c) to (d);
when the basic frame number is K, K ranges from 0 to F (loop) The sequence m =0 of the first playing node controller, the kth frame picture of the video content is played, and the sequence m =1 of the second playing node controller, the kth + F of the video content is played (loop) *1 frame picture, then the order m = u-1 of the u playing node controller plays the K + F of the video content (loop) * (u-1) frame picture.
The invention has the following beneficial effects and advantages:
1. the escalator is little in transformation, low-power consumption equipment is applied, the cost is reduced, and the energy consumption is saved;
2. the invention solves the problem of horizontal image playing after the display is installed on the escalator and the escalator handrail in an inclined way;
3. the invention uses the linear display array to form an ultra-wide media display system, which has large content information amount and novel form, so that the media display contents such as advertisements and the like synchronously move along with people on the escalator, and complete information contents are output to users in a long-time oriented manner.
4. The invention can simultaneously display a plurality of audio and video opposite media contents in the ultra-wide display system.
5. The invention can display ultra-wide continuous complete video pictures and break through the limitation of the transverse display size of the traditional media.
6. The invention comprises a playing content processing system, realizes the automatic processing of video playing resources and reduces the application difficulty.
7. The invention uses wireless communication mode to carry out data communication and control, thus the implementation and the deployment are simple and easy.
8. The invention uses the transparent display and the quart screen playing control method to realize that the plane video generates the three-dimensional object sense exceeding the plane sense, thereby improving the audio and video propaganda capability.
Drawings
FIG. 1 is an ultra wide media display system configuration for an escalator product of the present invention;
FIG. 2 illustrates a wireless access receiver and central controller in accordance with the present invention;
FIG. 3 is a flow chart of the application of the central controller according to the present invention;
fig. 4 is a playing control flow in the playing node controller according to the present invention;
FIG. 5 is a central controller software system architecture of the present invention;
FIG. 6 is a system architecture of a play node controller software system of the present invention;
FIG. 7 is a diagram illustrating Doppler audio processing according to the present invention;
FIG. 8 is a schematic representation of the processing of the image synchronized escalator movement of the present invention;
FIG. 9 is a schematic diagram of the horizontal calibration and amplification process of the present invention;
the escalator comprises an OLED display panel 1, a playing node controller 2, a wireless access receiver 3, a central controller 4, escalator handrail glass 5 and an escalator outer cover plate 6.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as modified in the spirit and scope of the present invention as set forth in the appended claims.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in figure 1, the structure schematic diagram of the invention is combined, and the transparent display panel ultra-wide display system of the escalator product comprises an OLED display panel 1, a playing node controller 2, a central controller 4, a wireless access receiver 3 and an escalator ultra-wide media playing integrated control system.
As shown in fig. 1, the OLED display panel 1 uses a transparent liquid crystal panel having a height smaller than that of the handrail glass 5 of the escalator.
The central controller 4 is in wireless communication with the playing node device 2 through the wireless access receiver 3, and is used for processing the acquired original video content and sending the processed video content and a playing control instruction generated by the central controller 4 to the playing node controller 2 through the wireless access receiver 3, and the central controller 4 is arranged in the coverage range of the wireless access receiver 3;
the number of the playing node controllers 2 is multiple, each playing node controller 2 is provided with a loudspeaker, the playing node controllers 2 are linearly arranged along the running direction of the escalator, are symmetrically arranged on the outer cover plates on the two sides of the escalator and are connected with the OLED display panel 1 through FCP (fiber channel protocol) flat cables, and the playing node controllers are used for converting received playing control instructions into corresponding single-frame video data and sending the single-frame video data to the corresponding OLED display panel 1;
the OLED display panel 1 is attached to the outer escalator glass and used for playing video contents output by the playing node controller;
the wireless access receiver 3 is arranged at the midpoint and above the central line of the escalator in the running direction and used for receiving data sent by the central controller 4 by all the play node controllers 2 in the constructed network.
The physical hardware of the playback node controller 2 includes:
1. a high-performance computing and processing unit with low cost, low energy consumption and small volume and the video hardware decoding capability of 4k physical resolution and 60FPS frame rate is used;
2. the power adapter outputs current under the voltage of 5A with the voltage of 12V;
PCI-E M.2 interface solid state storage;
a 4.40W small volume speaker;
5. an electronic protective housing.
The playing node controller 2 is connected with the OLED display panel 1 through an HDMI 2.0FPC connecting line.
On the play node controller, as shown in fig. 6: the software structure of the playback node controller is composed of three layers, as shown in fig. 7.
The bottom layer is an operating system based on Linux ForARM 64, and the hardware IO operating capability is extracted
The middle layer is provided with a network communication basic module based on the UDT and an FFmpeg audio and video processing module.
The upper layer is an application processing layer which is composed of a playing node setting module, a file receiving module and a playing frame control module.
The playing node setting module comprises an IP setting function, a node ID setting function and a sequence number setting function. The playing node setting module is used for setting an IP address of the playing node controller for network communication, setting a unique ID identifier for the playing node for matching management with the control end, setting a serial number for the playing node for marking the spatial position of the node, and completing basic information setting required by playing videos of the ultra-wide media display system by mutually matching with the playing node management module of the control end.
The file receiving module comprises a broadcast file receiving function and a directional file receiving and sending function. The file receiving module is used for receiving the video media sent by the controller, receiving broadcast data in two modes, receiving directionally sent data, corresponding to the two distribution modes of the control end, and carrying out network communication with the control end by using the same UDT-based communication protocol.
The playing frame control module instructs a function of receiving frame number data, a function of analyzing and loading node frame number data, and a function of playing frame synchronization. The playing frame control module receives and processes a playing instruction and basic frame data sent by the controller, extracts a basic frame number from the data after receiving the playing instruction, determines a frame number to be played by the playing node according to the basic frame number and a spatial position, the relationship between the basic frame number and the frame number of the node is already explained in the control end, determines that the frame number to be played plays a video frame by frame at 60HZ per second, and completes the staircase synchronous motion audio and video playing of the ultra-wide linear display array.
The central controller 4 physical hardware includes:
1. the high-performance computing and processing unit has low cost, low energy consumption, small volume and high performance and can perform neural network computation.
2. The power adapter outputs current with 12V voltage 5A in ultra-thin type.
PCI-E M.2 interface solid state storage.
4. Electronic protective shell
The central controller 4 forms a wireless communication network with a plurality of playing node controllers 2 arranged on an outer cover plate 6 of the escalator through the wireless access receiver 3.
As shown in fig. 5, the central controller 4 includes: a Linux operation layer, a basic function service layer and an application processing layer from bottom to top;
the Linux operating layer is arranged on the bottom layer, is based on an operating system of Linux For ARM64 and is used For providing hardware IO;
basic function service layer locates the middle level, based on the network communication basic module of UDT, FFmpeg, openCV audio and video processing module, the basic function service layer that the transparent channel processing neural network module of video deduction picture constitutes includes: the communication basic program library and the audio and video processing basic program library of the application processing layer comprise a transparent channel processing basic program library;
the application processing layer is arranged on the upper layer and is used for determining a playing control instruction corresponding to the playing node controller 2 and sending the playing control instruction and the processed video content to the wireless access receiver 3 through the communication module;
an application handling layer comprising: the system comprises a playing content processing module, a playing node management module, a content distribution module and a playing control module;
the playing content processing module is used for carrying out transparent channel processing on the original video content through a transparent channel processing basic program library, and sending the processed image angle rotation and size amplification to the content distribution module so as to realize playing on the OLED display panel 1 with the same inclination angle as the escalator;
a playing node management module for recording the IP address and the physical arrangement position information of each playing node controller 2, wherein the IP address is used for network communication so that the central controller 4 sends a playing control instruction to the playing node controllers 2 in a broadcasting or directional manner,
the content distribution module is used for recording the IP address and the physical arrangement position information of each playing node controller 2 through the playing node management module and sending a processed specified video content file to a certain playing node controller 2 in the network coverage range of the formed central controller 4 in a broadcasting mode or a directional mode; the data sent by the content distribution module is received by the playing node controller 2;
the playing control module is used for sending playing control instructions to each playing node controller 2;
the arrangement mode on the escalator is described by combining the figure 1, the inclined angle of the escalator refers to the included angle formed by the step running route of the inclined section and the horizontal plane, and is represented as alpha;
arrangement mode 1:
a plurality of OLED transparent display screens are arranged on the outer side of the handrail glass of the non-horizontal part of the handrail of the single-side escalator or the double-side escalator at intervals, and the angle of the OLED transparent display screens is the same as the inclination angle of the escalator. The play node controller is located at the lower middle part of the transparent panel, is connected with the OLED transparent panel through an FCP flat cable, and is placed on the plane of the outer cover plate, and each OLED transparent panel displays independent unrelated content, as shown in fig. 1.
Arrangement mode 2:
a plurality of OLED transparent display panels are closely connected and placed on the outer side of the handrail glass of the non-horizontal part of the handrail of the escalator, and the angle of the OLED transparent display panels is the same as the inclination angle of the escalator. The play node controller is positioned at the lower middle part of the transparent panel, is connected with the OLED transparent panel through an FCP flat cable, and is placed on the plane of the outer cover plate to form an ultra-wide linear display array.
As shown in fig. 2, the arrangement of the wireless access receiver 3 and the central controller 4 is explained.
The wireless access receiver 3 is arranged in the middle of an airspace above the escalator, and the central controller 4 is arranged at the adjacent position of the wireless access receiver 3 or any place where the wireless access receiver 3 is in a coverage range and has excellent wireless signals.
The escalator ultra-wide media playing integrated control system comprises a control end and a playing end, wherein: an audio/video escalator scene playing resource processing system of the escalator ultra-wide media playing integrated control system runs on the central controller 4.
As shown in fig. 3 to 4, the application flows of the central controller and the playing node controller of the present invention are shown; a display method of an information display system based on a transparent OLED comprises the following steps:
1) Sending the video content to be played and the escalator operation parameters to the central controller 4, and judging whether the video content is transparent channel video content or not by the central controller 4;
the escalator operating parameters include: staircase inclination angle, staircase direction of operation, staircase operating speed.
If the video content does not have the video content of the transparent channel, the application processing layer processes the transparent channel for the video content according to the transparent channel processing basic program library, and then performs horizontal correction and amplification processing for the video content according to the audio and video processing basic library; otherwise, the horizontal correction and the amplification treatment are directly carried out through the application treatment layer;
2) After the playing content processing module of the central controller 4 processes the video content, generating video content which uses a playing control instruction to realize that the picture content crosses the screen in the OLED in the left or right direction and has the same direction and speed as the escalator;
3) The content distribution module of the central controller 4 sends the processed video content to all the playing node controls 2 in a broadcast mode through the wireless access receiver 3, the processed video content is received by the playing node controls 2 and is stored in the local storage of the playing node controls 2;
4) The wireless access receiver 3 sends the playing control instruction of the central controller 4 to the corresponding playing node controller 2, and the playing node controller 2 acquires the frame number of the video content to be played at the same moment of each OLED panel 1 according to the basic frame number of the playing control instruction and the physical sequence position information of the playing node controller, and plays the frame.
The playing content processing module comprises: an NPU-based AI video content transparent channel processing function, a video content staircase playing level correction and amplification processing function, a Doppler type sound source processing function and an ultra-wide non-horizontal picture staircase synchronous motion playing film source generation function. The playing content processing module is used for processing original video content, firstly, a neural network model based on an NPU is used for carrying out transparent channel processing on the video content to obtain video content with a transparent channel, then, a video content staircase is used for playing horizontal correction and amplification processing functions, due to the fact that the gradient running route of the inclined section of the staircase and the horizontal plane have an inclined angle, an OLED (organic light emitting diode) placed on handrail glass of the inclined section of the staircase has the same angle with the horizontal plane, relative to a person standing vertically, the original video content has an inclined angle, and picture deflection can be conducted on media without characters and widely known people and objects, under the condition, the picture content can be intuitively perceived, the perception process of pictures containing the characters and new objects needs a period of time, 1-2 seconds and even more time to be perceived, and information transmission is not facilitated. In the case where the content is transparent, the correct judgment of the spatial sense of the screen may be lost, and there may be a certain risk, for example, the spatial sense and the balance capability in the VR environment are disturbed, which may cause a danger. Therefore, the transparent screen is necessary to be applied to the horizontal correction of the picture in the escalator environment,
the playing node management module comprises: the space position setting function of the playing node controller, the node IP address design function, the node equipment state detection function and the like. The play node management module comprises a play node controller, a play node controller and a display control module, wherein the play node controller has a spatial position setting function of setting the arrangement sequence of the play control nodes in a linear display array on the left side or the right side of the escalator and in the linear display array; the node IP address design function is to set the IP address of the playing node controller for data communication identification.
The content distribution module comprises a broadcast type file distribution function and a directional type file distribution function. The broadcast type file distribution function included by the content distribution module means that the central controller sends the processed media content files to the network in a broadcast mode, and the broadcast type file distribution has the advantages of high efficiency; in single transmission, all the broadcasting nodes in the network constructed by the wireless access receiver 3 can receive data, and the one-to-many communication mode is adopted; the directed file distribution function refers to that media content files can be distributed to a specific playing node, and a content distribution module is realized on a middle-layer framework of a network communication basic module based on a UDT.
As shown in fig. 9, the processing procedure of the horizontal correction and amplification processing of the video content relative to the staircase glass by the audio/video processing module in the central controller includes the following steps:
rotating the video content by taking a geometric center point of a film source as a center by using FFmpeg and OpenCV;
1) Rotating the original video content by taking a geometric central point of a display picture as a center through OpenCV;
2) Because the existing OLED display panel can only display video contents on the front, the OLED display panels on the two sides are opposite in front under the condition that the OLED panels are arranged on the left side and the right side of the escalator, video processing at different angles is carried out on film sources when the same video contents are displayed on the two upward sides or the two downward sides of the escalator, and four target processing files are output by one unprocessed film source, namely an upward left side video, an upward right side video, a downward left side video and a downward right side video.
3) Processing angles are processed by adopting standard polar coordinates, the upward left video content deflection angle is an escalator inclination angle alpha, the upward right video content deflection angle is an escalator inclination angle 360-alpha, the downward left video content deflection angle is an escalator inclination angle alpha, and the downward right video content deflection angle is an escalator inclination angle 360-alpha;
4) After the video content picture rotates, enlarge the image through FFmpeg, can produce blank pixel in the border corner after the picture rotates, can seriously influence video sense organ to not containing transparent channel video, the solution is to carry on the side big to the image, covers blank pixel, the magnification coefficient of image:
Figure BDA0002908933450000141
wherein, alpha is the staircase inclination angle, h is the OLED display panel height, and w is the OLED display panel width.
The video amplification factor uses FFmpeg (FFmpeg is a set of open source computer programs which can be used for recording, converting digital audio and video and converting the digital audio and video into streams according to the formula), comprises a libavcodec (the current leading audio/video coding library) and OpenCV (OpenCV is a cross-platform computer vision and machine learning software library issued based on BSD permission (open source) and can run on Linux, windows, android and Mac OS operating systems).
The playing content processing module in step 2) processes the video content, including: the playing content processing module in the central controller divides the video content into two modes, namely a single media content mode and a plurality of media content modes.
As shown in fig. 8, the single media content mode includes the following steps:
when the required video content is in a single media content mode, namely the same video content moving towards the ascending direction or the descending direction of the escalator is displayed in a plurality of displays, the spacing of the display content is equal to q x the spacing of the outer contour of a single OLED display panel; q is the number of the OLED display panels 1 on one side of the escalator;
a. the number of cycle frames in the OLED display panel (1) is then expressed as:
Figure BDA0002908933450000151
wherein L is the width of the OLED display panel, V is the speed of the escalator, F is the frame rate, and F is the frame rate (loop) The number of cycle frames;
b. the number of pixels moved per frame is expressed as:
F p ＝F (loop) ÷P x (2)
wherein, P x The number of pixels is one horizontal line of a single screen;
substituting equation (2) into equation (1) yields the number of pixels moved per frame:
Figure BDA0002908933450000152
c. the video which is arranged on the left side of the escalator and moves upwards or downwards at the right side of the escalator uses the following formula to process the displacement of the video:
x＝(nmodF (loop) )×F p
where mod is the remainder function,n is the range of frame number 0 to total frame number F of the video (all) Current frame number, x is the pixel point position to be moved to, F p Moving the number of pixels per frame;
d. then moving the video pixel points, and processing the displacement of the video by using the following formula for the video which is arranged on the right side of the escalator and goes upward or the left side of the escalator and goes downward:
x＝P x -(nmodF (loop) )×F p
e. moving the video pixel points when the total frame number is F (all) Number of frames F that cannot be cycled (loop) And supplementing the frame number when dividing the video into whole frames, wherein the displacement value of each video in the screen linear array is the same, and the supplemented frame number is as follows:
F (fill) ＝F (loop) -(F (all) mod F (loop) )；
the number of frame supplement is completed in the playing processing module of the central controller 4, and F of the original video is processed according to the amplified video (all) Frame video plus F (fill) Frame transparent blank visual composition can be F (loop) New video for integer division, i.e.: f (All) ＝F (all) +F (fill) And will new video file F (All) Sending to the playing node controller 2 for storage;
a plurality of media content modes comprising the steps of:
when the required video content is a plurality of media video contents, namely the plurality of video contents are synthesized into one video content which is played in the OLED display panel array in sequence and in synchronous motion with the escalator, a single video uses a single media content mode to supplement the frame number, all the supplemented single video contents are synthesized into a new video file in sequence, and the new video file is sent to the node player (2) to be stored, then: the number of the video frames played by the 1 st playing node controller (2) is as follows: 0 to F (All) N frames; the number of video frames played by the mth playing node controller (2) is: f (All) ÷m×(m-1)～F (All) And then, processing according to the content of the single media, and storing the output video by using solid storage to store data, thereby providing sufficient reading and writing speed for efficient data operation.
As shown in fig. 7, the doppler sound source processing function simulates the movement of a sound source in space by using the doppler effect, so as to realize the effect of synchronous motion of audio and video, speakers built in the playing node controllers on the plane of the outer cover plate at both sides of the escalator form a linear speaker array, and in the left video processing, the amplitude of the sound source processing at the position of a pixel x is processed according to the following method:
0 to
Figure BDA0002908933450000161
Frame, previous speaker amplitude coefficients are:
Figure BDA0002908933450000162
amplitude coefficient of the latter speaker:
Figure BDA0002908933450000171
Figure BDA0002908933450000172
to P x Frame, previous speaker amplitude coefficient:
Figure BDA0002908933450000173
amplitude coefficient of the latter speaker:
Figure BDA0002908933450000174
number of pixels moved per frame:
Figure BDA0002908933450000175
frame number range (x-1) × F when moving image by x pixels p To x F p Frames, the amplitude of the original audio in this range is equal toMultiplying the amplitude coefficients to obtain new audio frequency with amplified and reduced volume, wherein the front one of the two loudspeakers is based on the amplitude coefficient
Figure BDA0002908933450000176
Amplification, the amplitude factor of the latter loudspeaker
Figure BDA0002908933450000177
And (4) reducing to form simulation of the motion of the sound source so as to realize the effect of synchronous motion of sound and images in the linear display array.
In the step 4), the method specifically comprises the following steps:
the spatial position and the playing frame number on different playing node controllers 2 meet the following relation, and the playing node controller array on the left side of the escalator meets the following conditions:
F (client) ＝m×F (loop) +F (server)
wherein m is a serial number of the playing node controllers which are connected in the physical space sequence, the serial number is from left to right or from right to left, F (client) For playing the frame number, F, that the node controller should play (server) Basic frame number, F, issued for the central controller (loop) Cyclic frame number for video file, ranging from 0 to F (loop) In the middle of;
the playing control module comprises a broadcasting type playing control function and a directional type playing control function. The playing control module consists of a control end and a playing end, wherein the control end runs on the central node controller, and the playing end runs on the playing node controller. The broadcasting control module has two control modes, namely broadcasting type broadcasting control and directional broadcasting control, when the broadcasting type broadcasting control mode is applied, a control end broadcasts and sends a media content broadcasting control instruction to a broadcasting end through a communication network consisting of AP nodes, all broadcasting ends receive broadcasting data and then perform data calculation analysis by combining with space position information set in a broadcasting node management module, calculate the frame number of video content to be played at the same moment of each OLED panel and play the frame, the space positions and the broadcasting frame numbers on different broadcasting nodes meet the following relation, and a left broadcasting node controller array meets the formula:
when the number of basic frames is K, K ranges from 0 to F (loop) The sequence m =0 of the first playing node controller, the Kth frame of the video content is played, and the sequence m =1 of the second playing node controller, the Kth + F of the video content is played (loop) *1 frame picture, then the order m = u-1 of the u playing node controller plays the K + F of the video content (loop) * (u-1) frame picture.

Claims (6)

1. A display method of an information display system based on a transparent OLED is realized based on the information display system based on the transparent OLED and comprises the following steps: the system comprises a central controller (4), a playing node controller (2), an OLED display panel (1) and a wireless access receiver (3);
the central controller (4) is in wireless communication with the playing node controller (2) through the wireless access receiver (3) and is used for processing the acquired original video content and sending the processed video content and a playing control instruction generated by the central controller (4) to the playing node controller (2) through the wireless access receiver (3), and the central controller (4) is arranged in the coverage range of the wireless access receiver (3);
the number of the playing node controllers (2) is multiple, each playing node controller (2) is provided with a loudspeaker, the playing node controllers (2) are linearly arranged along the running direction of the escalator, symmetrically arranged on outer cover plates on two sides of the escalator and connected with the OLED display panel (1) through FCP (fiber channel panel) flat cables, and the playing node controllers are used for converting received playing control instructions into corresponding video contents and sending the video contents to the corresponding OLED display panel (1);
the OLED display panel (1) is attached to the outer escalator glass and used for playing video contents output by the playing node controller (2);
the wireless access receiver (3) is arranged above the midpoint of the center line of the escalator in the running direction and is used for constructing all the playing node controllers (2) in the network and receiving data sent by the central controller (4);
the playing control instruction comprises a playing video name and a basic frame number; the basic frame number is a play viewCurrent frame number when the frequency is played on a single OLED display panel (1), i.e. F (server) ；
The central controller (4) comprises: a Linux operation layer, a basic function service layer and an application processing layer from bottom to top;
the Linux operating layer is arranged on the bottom layer and used for providing hardware IO;
the basic function service layer is arranged on the middle layer and comprises: the communication basic program library and the audio and video processing basic program library of the application processing layer comprise a transparent channel processing basic program library;
the application processing layer is arranged on the upper layer and is used for determining a playing control instruction corresponding to the playing node controller (2) and sending the playing control instruction and the processed video content to the wireless access receiver (3) through the communication module;
the application processing layer comprises: the system comprises a playing content processing module, a playing node management module, a content distribution module and a playing control module;
the playing content processing module is used for carrying out transparent channel processing on original video content through a transparent channel processing basic program library, and sending the processed video content to the content distribution module after picture angle rotation processing and size amplification processing so as to realize playing on the OLED display panel (1) with the same inclination angle as the escalator;
the playing node management module is used for recording the IP address and the physical arrangement position information of each playing node controller (2), and the IP addresses are used for network communication so that the central controller (4) sends playing control instructions to the playing node controllers (2) in a broadcasting mode or a directional mode;
the content distribution module is used for recording the IP address and the physical arrangement position information of each playing node controller (2) through the playing node management module and sending a processed specified video content file to a certain playing node controller (2) in the network coverage range of the formed central controller (4) in a broadcasting mode or a directional mode; the data sent by the content distribution module is received by the playing node controller (2);
the playing control module is used for sending playing control instructions to each playing node controller (2), and is characterized by comprising the following steps:
1) Sending the video content to be played and the escalator operation parameters to a central controller (4), and judging whether the video content is transparent channel video content or not by the central controller (4);
the escalator operating parameters include: the escalator inclination angle, the escalator running direction and the escalator running speed;
if the video content does not have the video content of the transparent channel, an application processing layer in the central controller (4) processes the transparent channel of the video content according to a transparent channel processing basic program library and then performs horizontal correction and amplification processing on the video content according to an audio and video processing basic library; on the contrary, the horizontal correction and the amplification processing are directly carried out through an application processing layer in the central controller (4);
2) After the playing content processing module of the central controller (4) processes the video content, generating video content which uses a playing control instruction to realize that the picture content crosses the screen in the OLED in the left or right direction and has the same direction and speed as the escalator;
3) A content distribution module of the central controller (4) sends the processed video content to all the playing node controllers (2) in a broadcast mode through the wireless access receiver (3), the processed video content is received by the playing node controllers (2) and stored on the playing node controllers (2);
4) The wireless access receiver (3) sends the playing control instruction of the central controller (4) to the corresponding playing node controller (2), and the playing node controller (2) acquires the frame number of the video content to be played at the same moment of each OLED display panel (1) according to the basic frame number of the playing control instruction and the position information of the physical sequence of the playing node controller, and plays the frame.
2. The method as claimed in claim 1, wherein the video content is horizontally corrected and amplified with respect to the staircase glass by an audio/video processing module in the central controller, comprising the steps of:
1) Rotating the original video content by taking a geometric central point of a display picture as a center through OpenCV;
2) When the staircase left and right sides all is equipped with OLED display panel (1) under the condition, OLED display panel openly is relative in both sides, and the film source carries out the video processing of different angles, outputs four target processing files, promptly: an uplink left video, an uplink right video, a downlink left video and a downlink right video;
3) Processing angles are processed by adopting standard polar coordinates, the upward left video content deflection angle is an escalator inclination angle alpha, the upward right video content deflection angle is an escalator inclination angle 360-alpha, the downward left video content deflection angle is an escalator inclination angle alpha, and the downward right video content deflection angle is an escalator inclination angle 360-alpha;
4) After the video content picture is rotated, amplifying the image through FFmpeg to cover blank pixel points, wherein the image amplification factor is as follows:
Figure FDA0003987617380000041
wherein, alpha is the staircase inclination angle, h is the OLED display panel height, and w is the OLED display panel width.
3. The displaying method of the information displaying system based on the transparent OLED according to claim 1, wherein the playing content processing module in step 2) processes the video content, and comprises: the playing content processing module in the central controller divides the video content into two modes, namely a single media content mode and a plurality of media content modes.
4. The method for displaying the transparent OLED-based information display system according to claim 3, wherein the single media content mode comprises the following steps:
when the required video content is in a single media content mode, namely the same video content moving towards the ascending direction or the descending direction of the escalator is displayed in a plurality of displays, the spacing of the display content is equal to q x the spacing of the outer contour of a single OLED display panel; q is the number of the OLED display panels (1) on one side of the escalator;
a. the number of cycle frames in the OLED display panel (1) is then expressed as:
Figure FDA0003987617380000042
wherein L is the width of the OLED display panel, V is the speed of the escalator, F is the frame rate, and F is the frame rate (loop) The number of cycle frames;
b. the number of pixels moved per frame is expressed as:
F p ＝F (loop) ÷P x (2)
wherein, P x The number of horizontal single-line pixels of a single screen;
substituting equation (2) into equation (1) yields the number of pixels moved per frame:
Figure FDA0003987617380000051
c. the video which is arranged on the left side of the escalator and moves upwards or downwards at the right side of the escalator uses the following formula to process the displacement of the video:
x＝(n×modF (loop) )×F p
wherein mod is a remainder function, and n is a frame number range from 0 to a total frame number F of the video (all) Current frame number, x is the pixel point position to be moved to, F p Moving the number of pixels per frame;
d. then moving the video pixel points, and processing the displacement of the video by using the following formula for the video which is arranged on the right side of the escalator and goes upward or the left side of the escalator and goes downward:
x＝P x -(n×modF (loop) )×F p
e. moving the video pixel points, when the total frame number is F (all) Number of frames F that cannot be cycled (loop) When dividing, the frame number is supplemented, so that each video is linear on the screenIf the shift values in the array are the same, the number of supplemental frames is:
F (fill) ＝F (loop) -(F (all) mod F (loop) )；
the number of frame supplement is completed in a playing processing module of the central controller (4), and F of the original video is processed according to the amplified video (all) Frame video plus F (fill) Frame transparent blank video composition may be F (loop) New video for integer division, i.e.: f (All) ＝F (all) +F (fill) And will new video file F (All) Sending the data to a playing node controller (2) for storage;
the plurality of media content modes comprising the steps of:
when the required video contents are a plurality of media video contents, namely the plurality of video contents are synthesized into one video content which is played in the OLED display panel array according to the sequence and synchronously moves with the escalator, a single video uses a single media content mode to supplement the frame number, all the supplemented single video contents are synthesized into a new video file according to the sequence, and the new video file is sent to the playing node controller (2) to be stored, then: the number of video frames played by the 1 st playing node controller (2) is as follows: 0 to F (All) N frames; the number of video frames played by the mth playing node controller (2) is: f (All) ÷m×(m-1)～F (All) 。
5. The method as claimed in claim 1, wherein the playing content processing module of the central controller simulates the movement of the sound source in the space by using doppler effect, so as to achieve the effect of synchronous motion of audio and video, and in the video processing on the left side of the escalator, the amplitude of the sound source processing at pixel x position is processed according to the following manner:
0 to
Figure FDA0003987617380000061
And for a frame, on the unilateral escalator, in any two adjacent loudspeakers, the amplitude coefficient of the front loudspeaker is as follows:
Figure FDA0003987617380000062
amplitude coefficient of the latter speaker:
Figure FDA0003987617380000063
Figure FDA0003987617380000064
to P x Frame, for a unilateral escalator, in any two adjacent loudspeakers, the amplitude coefficient of the front loudspeaker is:
Figure FDA0003987617380000065
amplitude coefficient of the latter speaker:
Figure FDA0003987617380000066
number of pixels moved per frame:
Figure FDA0003987617380000067
frame number range (x-1) F when moving image x pixels p To x F p And frame, multiplying the amplitude of the original audio in the range by an amplitude coefficient to obtain a new audio with the amplified and reduced volume: for a unilateral escalator, the front loudspeaker in any two adjacent loudspeakers is in accordance with the amplitude coefficient
Figure FDA0003987617380000068
Amplification, the amplitude factor of the latter loudspeaker
Figure FDA0003987617380000069
And (4) reducing to form simulation of the motion of the sound source so as to realize the effect of synchronous motion of sound and images in the linear display array.
6. The displaying method of the information displaying system based on the transparent OLED according to claim 1, wherein in the step 4), specifically:
the spatial positions and the play frame numbers on different play node controllers (2) meet the following relations, and the play node controller array on the left side of the escalator meets the following conditions:
F (client) ＝m×F (loop) +F (server)
wherein m is the serial number of the playing node controllers which are arranged in the physical space sequence, the serial number is from left to right or from right to left, F (client) For the frame number, F, that the node controller should play (server) Basic frame number, F, issued for central controller (loop) Cyclic frame number for video file, ranging from 0 to F (loop) In the middle of;
when the basic frame number is K, K ranges from 0 to F (loop) The sequence m =0 of the first playing node controller, the kth frame picture of the video content is played, and the sequence m =1 of the second playing node controller, the kth + F of the video content is played (loop) *1 frame picture, then the order m = u-1 of the u playing node controller plays the K + F of the video content (loop) * (u-1) frame picture.
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CN103139610A (en) * 2013-01-23 2013-06-05 深圳市创凯电子有限公司 Method and device of cluster video synchronized broadcast
CN204117561U (en) * 2014-08-22 2015-01-21 安徽工程大学 Intelligent advertisement board
CN111526400A (en) * 2020-05-06 2020-08-11 上海鸣啸信息科技股份有限公司 Multimedia control system applied to train
CN112217960A (en) * 2020-10-14 2021-01-12 四川长虹电器股份有限公司 Method for synchronously displaying multi-screen playing pictures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103139610A (en) * 2013-01-23 2013-06-05 深圳市创凯电子有限公司 Method and device of cluster video synchronized broadcast
CN204117561U (en) * 2014-08-22 2015-01-21 安徽工程大学 Intelligent advertisement board
CN111526400A (en) * 2020-05-06 2020-08-11 上海鸣啸信息科技股份有限公司 Multimedia control system applied to train
CN112217960A (en) * 2020-10-14 2021-01-12 四川长虹电器股份有限公司 Method for synchronously displaying multi-screen playing pictures

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