CN110996147A - Multi-screen signal processing device - Google Patents

Multi-screen signal processing device Download PDF

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Publication number
CN110996147A
CN110996147A CN201911223399.9A CN201911223399A CN110996147A CN 110996147 A CN110996147 A CN 110996147A CN 201911223399 A CN201911223399 A CN 201911223399A CN 110996147 A CN110996147 A CN 110996147A
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Prior art keywords
display device
module
image
signal processing
management unit
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CN201911223399.9A
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Inventor
张振权
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Shenzhen Chuangxian Cloud Technology Co Ltd
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Shenzhen Chuangxian Cloud Technology 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]
    • H04N21/40—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
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel 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]
    • H04N21/40—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
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
    • H04N21/43637—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]

Abstract

The invention relates to the technical field of screen signal processing, in particular to a multi-screen signal processing device. The system comprises an integral management unit and an individual management unit, wherein the integral management unit is used for managing all display equipment; the individual management unit is used for managing the single display device. In this many screen signal processing apparatus, adopt whole management unit to manage all display device, acquire display device's total number through display device management module, transmit image information through image transmission module, be convenient for display device and carry out whole master, realize unified regulation and control, adopt individual management unit to manage single display device, acquire display device's parameter information through acquiring display device information module, the image information who matches is converted according to display device's parameter information through image conversion module, realize single display device's accurate control.

Description

Multi-screen signal processing device
Technical Field
The invention relates to the technical field of screen signal processing, in particular to a multi-screen signal processing device.
Background
With the development of the modern digital display technology, simple single-screen display cannot meet the requirements of the current market, so that a multi-screen display technology is developed, the multi-screen display technology displays pictures on a plurality of screens under the same host, and the existing multi-screen display technology has the problems of low multi-screen regulation technology and low single-screen operation precision, so that the multi-screen display has certain defects.
Disclosure of Invention
The present invention is directed to a multi-screen signal processing apparatus, so as to solve the problems in the prior art.
In order to achieve the above object, the present invention provides a multi-screen signal processing apparatus, including an overall management unit and an individual management unit, where the overall management unit is configured to manage all display devices; the individual management unit is used for managing the single display device; the whole management unit comprises a display device management module and an image transmission module, wherein the display device management module is used for acquiring the total number of the display devices, and the image transmission module is used for transmitting image information; the individual management unit comprises an acquisition display device information module and an image conversion module, wherein the acquisition display device information module is used for acquiring the parameter information of the display device, and the image conversion module is used for converting the matched image information according to the parameter information of the display device.
Preferably, the management method of the display device management module is as follows:
s1.1, a host sends a session connection request to each display device;
s1.2, after receiving the connection session request, the display equipment feeds back information to the host;
and S1.3, recording the feedback times by the host and acquiring the number of the display devices.
Preferably, the transmission method of the image transmission module is as follows:
s2.1, setting a ZigBee network;
s2.2, setting the resolution, compression ratio and subpackage size of the image, and compressing the image;
s2.3, sending the size information of the image to a sink node;
s2.4, waiting for receiving a packet taking command of the sink node;
and S2.5, taking out the corresponding data packet according to the packet ID in the packet taking command.
Preferably, the display device information acquiring module is configured to acquire a resolution, a refresh rate, and a logical coordinate of the display device.
Preferably, the resolution obtaining formula is as follows:
when in use
Figure BDA0002301480090000021
When the temperature of the water is higher than the set temperature,
Figure BDA0002301480090000022
to the best resolution;
when in use
Figure BDA0002301480090000023
When the temperature of the water is higher than the set temperature,
Figure BDA0002301480090000024
to the best resolution;
and Fmax is the highest resolution, and Fmin is the lowest resolution.
Preferably, the method for measuring the refresh rate is as follows:
s3.1, sampling a waveform of each frame by using an oscilloscope;
s3.2, outputting a pulse signal at the Trig out;
and S3.3, counting the pulse number of Trig out in one second.
Preferably, the logical coordinates are calibrated by a two-point calibration method, and the formula is as follows:
Figure BDA0002301480090000025
Figure BDA0002301480090000026
where X and Y are logical coordinates of the display device, X and Y are physical coordinates of the display device, and datx and day are the amount of migration in the X and Y directions.
Preferably, the image conversion module comprises an image adaptation module and a color matching algorithm module.
Preferably, the method steps of the image adaptation module are as follows:
s4.1, establishing a coordinate system, setting the scanning interval line number N with the X axis as a right square and the Y axis as a downward square;
s4.2, corresponding to the event, setting an event I, and finding that different pixel points are true by the line; in case two, the row does not find the different pixel point to be false.
Preferably, the color matching algorithm module uses a histogram matching algorithm as the color matching algorithm.
Compared with the prior art, the invention has the beneficial effects that:
1. in the multi-screen signal processing device, the whole management unit is adopted to manage all the display equipment, the total number of the display equipment is acquired through the display equipment management module, the image information is transmitted through the image transmission module, the display equipment is convenient to integrally master, and unified regulation and control are realized.
2. In the multi-screen signal processing device, the individual management unit is adopted to manage the single display equipment, the parameter information of the display equipment is acquired through the display equipment information acquisition module, and the image conversion module is used for converting the matched image information according to the parameter information of the display equipment, so that the accurate control of the single display equipment is realized.
Drawings
FIG. 1 is an overall system block diagram of the present invention;
FIG. 2 is a flowchart illustrating a method for managing a display device management module according to the present invention;
FIG. 3 is a flow chart of a transmission method of the image transmission module according to the present invention;
FIG. 4 is a flow chart of a method for measuring a refresh rate according to the present invention;
FIG. 5 is a flow chart of a method of the image adaptation module of the present invention.
The various reference numbers in the figures mean:
1. an overall management unit; 11. a display device management module; 12. an image transmission module;
2. an individual management unit; 21. acquiring a display equipment information module; 22. and the image conversion module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
the invention provides a multi-screen signal processing device, which comprises an integral management unit 1 and an individual management unit 2, wherein the integral management unit 1 is used for managing all display equipment; the individual management unit 2 is used for managing a single display device; the whole management unit 1 comprises a display device management module 11 and an image transmission module 12, wherein the display device management module 11 is used for acquiring the total number of display devices, and the image transmission module 12 is used for transmitting image information; the individual management unit 2 comprises an acquiring display device information module 21 and an image conversion module 22, wherein the acquiring display device information module 21 is used for acquiring parameter information of the display device, and the image conversion module 22 is used for converting matched image information according to the parameter information of the display device.
In this embodiment, the management method of the display device management module 11 is as follows:
s1.1, a host sends a session connection request to each display device;
s1.2, after receiving the connection session request, the display equipment feeds back information to the host;
and S1.3, recording the feedback times by the host and acquiring the number of the display devices.
The connection mode of the plurality of display devices and the host hardware mainly comprises the following steps: firstly, the power supply of a computer host is closed, the multi-screen display card is inserted into a corresponding PCI or AGP slot of the host according to the interface type of the multi-screen display card, and a data line interface of display equipment is connected with an output interface of the multi-screen display card; starting a computer, automatically detecting the installed multi-screen display card by the computer, and installing a driving program; and restarting the computer, setting the display card and the display attributes, identifying the plurality of display devices, setting the expansion of the multiple screens, and determining the proper arrangement mode of the multiple screens.
Wherein, the connection session request adopts a three-level tree type identification data unit: the server comprises a service name, a subject name and a data item name, wherein the service name is a character string used by the server for marking the name of the service provided by the server; the subject name is similar to a directory, and specifies an area of interest in the service scope; the data item names identify the data of a particular communication, and the server first registers the server before the client establishes a session, calls the DdeNameService () function to register all service names that the server can provide in the DDEML.
The session process mainly includes data receiving and sending, command execution and the like, and is similar to the message circulation of Windows, the session process is a transaction processing process, and the transaction processing can be carried out after the session is established. The client issues a transaction request through DdeClientTransaction. The method comprises the following specific steps:
LPBYTE data represents a data address to be transmitted; DWORD cbData represents the data length; HCONV hConv denotes the session handle; HSZ hszltem represents the name of the data item; UINT wFmt denotes the data format; UINT wType represents a transaction type; DWORD dwTimeout indicates the wait period; LPDWORD pdwResult indicates the result of the transaction.
Further, the transmission method of the image transmission module 12 is as follows:
s2.1, setting a ZigBee network;
s2.2, setting the resolution, compression ratio and subpackage size of the image, and compressing the image;
s2.3, sending the size information of the image to a sink node;
s2.4, waiting for receiving a packet taking command of the sink node;
and S2.5, taking out the corresponding data packet according to the packet ID in the packet taking command.
The method comprises the following steps that the object needs to be coded in the image compression process, and the coding adopts a Huffman coding method which comprises the following steps:
1) firstly, arranging input gray levels in a descending order according to the probability of occurrence;
2) adding the minimum two probabilities to form a new probability set, and rearranging according to the method in the step 1);
3) the code word allocation is carried out reversely from the last step, one of the last two probabilities is assigned to a '0' code, and the other probability is assigned to a '1' code, so that the probability arrangement from the beginning is carried out reversely; in the process, if the probability is not changed, the code word is still the original code word; if the probability is split into two, the first few bit code elements of the code word still use the original code word, and the last bit code element of the code word is assigned to a 0 code and the other is assigned to a 1 code.
It is worth noting that the obtain display device information module 21 is used to obtain the resolution, refresh rate and logical coordinates of the display device.
Further, the resolution obtaining formula is as follows:
when in use
Figure BDA0002301480090000051
When the temperature of the water is higher than the set temperature,
Figure BDA0002301480090000052
to the best resolution;
when in use
Figure BDA0002301480090000053
When the temperature of the water is higher than the set temperature,
Figure BDA0002301480090000054
to the best resolution;
and Fmax is the highest resolution, and Fmin is the lowest resolution.
It is worth noting that the refresh rate is measured as follows:
s3.1, sampling a waveform of each frame by using an oscilloscope;
s3.2, outputting a pulse signal at the Trig out;
and S3.3, counting the pulse number of Trig out in one second.
Wherein, the oscilloscope adopts the oscilloscope of model ZDS4000, and the oscilloscope apparatus operation is: and (3) rotating the ZDS4000 horizontal time base from the minimum gear 500ps to a large value, observing the Trigout frequency, and finding the maximum value.
The logic coordinate adopts a two-point calibration method, and the formula is as follows:
Figure BDA0002301480090000061
Figure BDA0002301480090000062
where X and Y are logical coordinates of the display device, X and Y are physical coordinates of the display device, and datx and day are the amount of migration in the X and Y directions.
Still further, the image conversion module 22 includes an image adaptation module and a color matching algorithm module.
The method steps of the image self-adapting module are as follows:
s4.1, establishing a coordinate system, setting the scanning interval line number N with the X axis as a right square and the Y axis as a downward square;
s4.2, corresponding to the event, setting an event I, and finding that different pixel points are true by the line; in case two, the row does not find the different pixel point to be false.
Specifically, the color matching algorithm module adopts a histogram matching algorithm, r and z respectively represent the gray levels of the input image and the output image, and the probability density function of the input gray level is pr(x) probability density function of output gray level is pz(. about), the formula is as follows:
Figure BDA0002301480090000063
Figure BDA0002301480090000064
then, z is H-1(s)＝H-1[T(r)]Only the input image is needed to obtain T (r) and obtain H-1I.e. the transformed gray level z can be found.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A multi-screen signal processing apparatus includes an overall management unit (1) and an individual management unit (2), characterized in that: the whole management unit (1) is used for managing all display devices; the individual management unit (2) is used for managing a single display device; the whole management unit (1) comprises a display device management module (11) and an image transmission module (12), wherein the display device management module (11) is used for acquiring the total number of display devices, and the image transmission module (12) is used for transmitting image information; the individual management unit (2) comprises an acquisition display device information module (21) and an image conversion module (22), wherein the acquisition display device information module (21) is used for acquiring parameter information of the display device, and the image conversion module (22) is used for converting matched image information according to the parameter information of the display device.
2. A multi-screen signal processing apparatus according to claim 1, wherein: the management method of the display device management module (11) is as follows:
s1.1, a host sends a session connection request to each display device;
s1.2, after receiving the connection session request, the display equipment feeds back information to the host;
and S1.3, recording the feedback times by the host and acquiring the number of the display devices.
3. A multi-screen signal processing apparatus according to claim 1, wherein: the transmission method of the image transmission module (12) is as follows:
s2.1, setting a ZigBee network;
s2.2, setting the resolution, compression ratio and subpackage size of the image, and compressing the image;
s2.3, sending the size information of the image to a sink node;
s2.4, waiting for receiving a packet taking command of the sink node;
and S2.5, taking out the corresponding data packet according to the packet ID in the packet taking command.
4. A multi-screen signal processing apparatus according to claim 1, wherein: the display device information acquisition module (21) is used for acquiring the resolution, the refresh rate and the logical coordinates of the display device.
5. A multi-screen signal processing apparatus according to claim 4, wherein: the resolution obtaining formula is as follows:
when in use
Figure FDA0002301480080000011
When the temperature of the water is higher than the set temperature,
Figure FDA0002301480080000012
to the best resolution;
when in use
Figure FDA0002301480080000021
When the temperature of the water is higher than the set temperature,
Figure FDA0002301480080000022
to the best resolution;
and Fmax is the highest resolution, and Fmin is the lowest resolution.
6. A multi-screen signal processing apparatus according to claim 4, wherein: the method for measuring the refresh rate comprises the following steps:
s3.1, sampling a waveform of each frame by using an oscilloscope;
s3.2, outputting a pulse signal at the Trigout;
and S3.3, counting the number of the pulses of the Trigout in one second.
7. A multi-screen signal processing apparatus according to claim 4, wherein: the logical coordinates adopt a two-point calibration method, and the formula is as follows:
Figure FDA0002301480080000023
Figure FDA0002301480080000024
where X and Y are logical coordinates of the display device, X and Y are physical coordinates of the display device, and datx and day are the amount of migration in the X and Y directions.
8. A multi-screen signal processing apparatus according to claim 1, wherein: the image conversion module (22) comprises an image adaptation module and a color matching algorithm module.
9. A multi-screen signal processing apparatus according to claim 8, wherein: the method steps of the image self-adapting module are as follows:
s4.1, establishing a coordinate system, setting the scanning interval line number N with the X axis as a right square and the Y axis as a downward square;
s4.2, corresponding to the event, setting an event I, and finding that different pixel points are true by the line; in case two, the row does not find the different pixel point to be false.
10. A multi-screen signal processing apparatus according to claim 8, wherein: the color matching algorithm adopts a histogram matching algorithm.
CN201911223399.9A 2019-12-03 2019-12-03 Multi-screen signal processing device Pending CN110996147A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102193766A (en) * 2010-03-18 2011-09-21 上海大视电子科技有限公司 System and method for optimizing multiscreen display area of computer
CN202422104U (en) * 2012-02-10 2012-09-05 广州瀚阳信息科技有限公司 Multi-screen parallel massive information display system
US20180113665A1 (en) * 2016-10-26 2018-04-26 Boe Technology Group Co., Ltd. Multi-screen display management system, display driving method and screen switching method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102193766A (en) * 2010-03-18 2011-09-21 上海大视电子科技有限公司 System and method for optimizing multiscreen display area of computer
CN202422104U (en) * 2012-02-10 2012-09-05 广州瀚阳信息科技有限公司 Multi-screen parallel massive information display system
US20180113665A1 (en) * 2016-10-26 2018-04-26 Boe Technology Group Co., Ltd. Multi-screen display management system, display driving method and screen switching method

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Application publication date: 20200410