CN105898558B - A kind of video broadcasting method and device - Google Patents
A kind of video broadcasting method and device Download PDFInfo
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- CN105898558B CN105898558B CN201510038761.0A CN201510038761A CN105898558B CN 105898558 B CN105898558 B CN 105898558B CN 201510038761 A CN201510038761 A CN 201510038761A CN 105898558 B CN105898558 B CN 105898558B
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Abstract
The present invention relates to field of video processing, more particularly to a kind of video broadcasting method and device, to solve the groove position that DSP occupies signal acquisition in tablet, the problem of causing signal acquisition way to tail off, and not making full use of DSP decoding performance.Video broadcasting method provided in an embodiment of the present invention includes：Multiple Internet video contents are received by the output board of more screen controllers, digital signal processor DSP and PLD FPGA are provided with output board；The multiple Internet video content is decoded using DSP, is output to after decoded multiple Internet video contents are spliced into Internet video all the way in FPGA；And the multiple local video contents received from exchange chip are spliced into by local video all the way using FPGA；Overlay video is obtained after the local video of splicing and the DSP Internet video spliced are overlapped using FPGA, the overlay video is exported to display screen and broadcasted.
Description
Technical field
The present invention relates to field of video processing, more particularly to a kind of video broadcasting method and device.
Background technology
With the development of Internet video encoding and decoding technique, more screen controllers to multiple local video contents by only splicing
Upper wall is shown afterwards, and upper wall will be carried out after multiple local video contents and the superposition of multiple Internet video contents by, which developing into, shows, with reality
More pictures mixing of existing local video and Internet video is broadcasted.
As shown in figure 1, the system architecture schematic diagram of multi-screen broadcast is realized for more screen controllers.The number being deployed in tablet
After word signal processor (Digital Signal Processing, DSP) is by Network Capture Internet video, it is solved
Field programmable gate array (Field-Programmable Gate Array, FPGA) is output to after code, after FPGA is to decoding
Internet video carry out Data Format Transform after be transferred to the exchange chip of power board, and output board is sent to by backboard；This
After ground video inputs also by tablet, output board is reached through exchange chip；In output board, using FPGA by local video and
Internet video zooms in and out, is output to after overlap-add procedure on a screen and carries out display broadcast.
Understand that first, DSP is deployed in tablet, can take and letter is carried out in tablet based on above-mentioned handling process
Number collection groove position, when there is decoding requirements, signal acquisition way will tail off；Secondly as exported by DSP in tablet
The limitation of mouth, a DSP are typically only capable to decode two-path video, are far from making full use of DSP decoding performance.
The content of the invention
The embodiment of the present invention provides a kind of video broadcasting method and device, and signal in tablet is occupied to solve DSP
The groove position of collection, the problem of causing signal acquisition way to tail off, and do not make full use of DSP decoding performance.
The embodiment of the present invention provides a kind of video broadcasting method, including：
Multiple Internet video contents are received by the output board of more screen controllers；Data signal is provided with the output board
Processor DSP and PLD FPGA；
The multiple Internet video content is decoded using the DSP in the output board, by decoded multiple nets
Network video content is output in the FPGA in the output board after being spliced into Internet video all the way；And will be from using the FPGA
Multiple local video contents that exchange chip receives are spliced into local video all the way；
Obtained after using FPGA, the local video of splicing and the DSP Internet video spliced are overlapped
Overlay video, the overlay video is exported to display screen and broadcasted.
Alternatively, it is described to be spliced into the multiple local video contents received from exchange chip all the way originally using the FPGA
Ground video, including：
, will each originally using the FPGA according to the layout of local video content and Internet video content on the display screen
Delete processing can be carried out by the partial content that the Internet video covers in ground video content, will be multiple after progress delete processing
Local video content is spliced into the sheet for including multiple local video contents and background content after the progress delete processing all the way
Ground video.
Alternatively, the background content is Transparent color content.
Alternatively, it is described to be entered the local video of splicing and the DSP Internet video spliced using FPGA
Overlay video is obtained after row superposition, including：
Filled at the background content position of the local video of splicing in the spliced Internet video
Hold, obtain the overlay video.
Alternatively, the DSP in the output board is connected with exchange chip；
After the DSP using in the output board decodes to the multiple Internet video content, in addition to：
If necessary to broadcast the multiple Internet video content on other display screens, then by decoded multiple networks
Video content is transferred on exchange chip by the DSP, then by exchange chip by decoded multiple Internet videos
Content transmission is into the output board being connected with other display screens.
The embodiment of the present invention provides a kind of output board broadcasted for video, including：
Input port, for receiving multiple Internet video contents, and by multiple Internet video content transmissions of reception to number
Word signal processor DSP；
The DSP, for being decoded to the multiple Internet video content, by decoded multiple Internet video contents
It is output to after being spliced into Internet video all the way in the PLD FPGA in the output board；
The FPGA, for the multiple local video contents received from exchange chip to be spliced into local video all the way；Will
The local video of splicing and the Internet video of DSP splicings obtain overlay video after being overlapped, and this is superimposed
Video frequency output to display screen is broadcasted.
In the embodiment of the present invention, the DSP for carrying out Internet video decoding is deployed in output board, also, DSP is to multiple
After Internet video content is decoded, decoded multiple Internet video contents are spliced into Internet video all the way first, will be spelled
The Internet video all the way connected is output in the FPGA in output board, so, FPGA can will be received from exchange chip it is more
After individual local video content is spliced into local video all the way, the road network that directly can splice local video all the way and DSP
Network video exports after being overlapped.DSP is deployed in output board by the embodiment of the present invention, can avoid carrying out in occupancy tablet
The groove position of signal acquisition, amount of acquisition channels is saved for signal input；Because DSP is deployed in output board, DSP is decoded no longer
Limited by delivery outlet, DSP decoding performance can be made full use of；Also, in embodiments of the present invention, DSP is except decoding
Outside, the splicing of video can also be carried out, so as to make full use of the other functions of DSP than decoding, takes full advantage of DSP moneys
Source.
Brief description of the drawings
Fig. 1 is that more screen controllers realize the system architecture schematic diagram that multi-screen broadcasts；
Fig. 2 (a) is that more screen controllers realize the system architecture schematic diagram that multi-screen broadcasts in the embodiment of the present invention；
Fig. 2 (b) is the structural representation for the output board for being provided with DSP and FPGA；
Fig. 3 is the video broadcasting method flow chart that the embodiment of the present invention one provides；
Fig. 4 (a) is to carry out spliced Internet video on the display screen to multiple decoded Internet video contents
Schematic layout pattern；
Fig. 4 (b) is to carry out spliced local video on the display screen to multiple decoded local video contents
Schematic layout pattern；
Fig. 4 (c) is the layout according to local video content on the display screen, and the local video content after processing is spliced
Into the schematic diagram of local video all the way；
Fig. 4 (d) is by the display effect schematic diagram after local video and Internet video superposition；
Fig. 5 is the video broadcasting method flow chart that the embodiment of the present invention two provides；
Fig. 6 is the output plate structure schematic diagram provided in an embodiment of the present invention broadcasted for video.
Embodiment
The basic thought of the embodiment of the present invention is：The DSP for carrying out Internet video decoding is deployed in output board, also,
Decoded multiple Internet video contents are spliced into a road network by DSP first after being decoded to multiple Internet video contents
Network video, the Internet video all the way spliced is output in the FPGA in output board, so, FPGA can will from exchange core
After multiple local video contents that piece receives are spliced into local video all the way, directly local video all the way and DSP can be spliced
It is good to export after Internet video is overlapped all the way.DSP is deployed in output board by the embodiment of the present invention, can avoid taking defeated
Enter to carry out the groove position of signal acquisition in plate, amount of acquisition channels is saved for signal input；Because DSP is deployed in output board, DSP enters
Row decoding is no longer influenced by the limitation of delivery outlet, can make full use of DSP decoding performance；Also, in embodiments of the present invention,
DSP can also carry out the splicing of video, so as to make full use of the other functions of DSP than decoding, fully in addition to decoding
It make use of DSP resources.
The embodiment of the present invention is described in further detail with reference to Figure of description.
It is that more screen controllers realize the system architecture schematic diagram that multi-screen broadcasts in the embodiment of the present invention as shown in Fig. 2 (a)；
More screen controllers include master control borad, tablet, power board and output board；Wherein, master control borad and tablet, power board and output
Plate is connected, and is responsible for input, processing and the output of control vision signal.Tablet and output board can have respectively it is multiple, wherein extremely
A few output board is the output board for realizing function of the embodiment of the present invention, and DSP and FPGA are provided with the output board；Such as Fig. 2 (b)
It is shown, to be provided with the structural representation of DSP and FPGA output board.Wherein, DSP is used for multiple nets to being inputted from output board
Network video content is spliced into Internet video all the way after being decoded, and spliced Internet video is exported into FPGA.Input
Plate is used to receive multiple local video contents, and uses built-in FPGA to pass through in power board the packing of multiple local video contents
Exchange chip transmit to the FPGA in output board (output board for realizing function of the embodiment of the present invention).FPGA regards multiple locals
After frequency content is spliced into local video all the way, the Internet video of the local video of splicing and DSP splicings is superimposed output
To display screen.
In addition, can should in order to realize being broadcasted across screen for the above-mentioned Internet video being provided with DSP output board
DSP in output board is joined directly together with exchange chip, and DSP transmits decoded Internet video to other defeated by exchange chip
On ejecting plate, it is overlapped display by the FPGA on other output boards with the local video received from exchange chip.
Based on said system framework, the embodiments of the invention provide following video broadcasting method and device, now to this hair
Bright each inventive point is described in detail.
Embodiment one
As shown in figure 3, the video broadcasting method flow chart provided for the embodiment of the present invention one, comprises the following steps：
S301：Multiple Internet video contents are received by the output board of more screen controllers；DSP is provided with the output board
And FPGA.
In the step, under the control of master control borad, output will be input to by multiple Internet video contents of Network Capture
In plate；Here, each Internet video content is one section of video flowing continuously broadcasted.
S302：The multiple Internet video content is decoded using the DSP in the output board, will be decoded more
Individual Internet video content is output in the FPGA in the output board after being spliced into Internet video all the way；And using the FPGA
The multiple local video contents received from exchange chip are spliced into local video all the way.
In the step, DSP decodes to the multiple Internet video contents being input in output board, and according to this multiple net
Layout of the network video content on display screen (such as video wall), one is spliced into after this multiple Internet video content is zoomed in and out
Road network video, the Internet video of splicing is exported to FPGA by BT1120 mouths, as shown in Fig. 4 (a), after to multiple decodings
Internet video content carry out the schematic layout pattern of spliced Internet video on the display screen.
In FPGA, multiple local video contents are received from exchange chip first, according to this multiple local video content
Layout on the display screen, this multiple local video content is zoomed in and out, is spliced into local video all the way, such as Fig. 4 (b) institutes
Show, to carry out the schematic layout pattern of spliced local video on the display screen to multiple decoded local video contents.
S303：The local video of splicing and the DSP Internet video spliced are overlapped using FPGA
The overlay video of Internet video and local video is obtained afterwards, and the overlay video is exported to display screen and broadcasted.
In the step, the local video of splicing and Internet video two-path video are superimposed as video all the way by FPGA.In order to protect
Demonstrate,prove local video and Internet video superposition after normal broadcast, it is necessary to local video content and Internet video content overlapping bit
Place is put, only broadcasts a kind of video content.Based on this, the embodiment of the present invention gives implementation below：
In S302, the multiple local video contents received from exchange chip are spliced into all the way locally using the FPGA
Video, including：
, will each originally using the FPGA according to the layout of local video content and Internet video content on the display screen
Delete processing can be carried out by the partial content that the Internet video covers in ground video content, will be multiple after progress delete processing
Local video content is spliced into the sheet for including multiple local video contents and background content after the progress delete processing all the way
Ground video.
Correspondingly, in S303, the Internet video of being spliced the local video of splicing and the DSP using FPGA
Overlay video is obtained after being overlapped, including：
Filled at the background content position of the local video of splicing in the spliced Internet video
Hold, obtain the overlay video.
Here, in FPGA, the part that the opening position that local video content can be covered by Internet video content is shown is regarded
Frequency content makees delete processing, as shown in Fig. 4 (c).According to the layout of local video content on the display screen, by the sheet after processing
Ground video content is spliced into local video all the way, wherein, in spliced local video, not by local video content covering
Opening position fills background content, in order to ensure the normal display of Internet video content after being superimposed, can be filled with background content
Transparent color content.When being superimposed, Transparent color is filled with local video with local video carrying out spliced Internet video
Network video content is filled at background content, in this way, just realizing the superposition of local video and Internet video, and ensure that local
The display effect of video and Internet video.As shown in Fig. 4 (d), for by local video and Internet video superposition after display effect
Schematic diagram.
Embodiment two
In order to which Internet video is broadcasted across screen, the DSP in output board can be joined directly together with exchange chip, DSP will be solved
Internet video after code is transmitted to other output boards by exchange chip, the FPGA on other output boards by its with from exchanging core
The local video that piece receives is overlapped display.
As shown in figure 5, the video broadcasting method flow chart provided for the embodiment of the present invention two, comprises the following steps：
S501：Multiple Internet video contents are received by the output board of more screen controllers；DSP is provided with the output board
And FPGA.
S502：The multiple Internet video content is decoded using the DSP in the output board, will be decoded more
Individual Internet video content is output in the FPGA in the output board after being spliced into Internet video all the way；If necessary to other aobvious
The multiple Internet video content is broadcasted on display screen curtain, then is transmitted decoded multiple Internet video contents by the DSP
Onto exchange chip, then by exchange chip by decoded multiple Internet video content transmissions to other displays
In the output board of screen connection.
In specific implementation process, decoded multiple Internet video contents can be transmitted directly to the friendship of connection by DSP
Change in chip, then be transferred to by exchange chip in other output boards, by the DSP in other output boards or FPGA according to these
Layout of the Internet video content on other display screens, zooms in and out to it, splices.Other output boards can be directly by splicing
Internet video afterwards is exported to display screen, is exported to display screen while is broadcasted after can also it be superimposed with local video.
Or if these Internet video contents in the layout corresponding to the output board initially entered on display screen, with
Layout on other display screens is identical, then DSP can will directly complete spliced Network Video Transmission all the way to exchange
In chip, by exchange chip by the spliced Network Video Transmission into other output boards, other output boards can directly by
It is exported to display display screen, is exported to display screen while is broadcasted after can also it be superimposed with local video.
S503：, will using the FPGA according to the layout of local video content and Internet video content on the display screen
Delete processing can be carried out by the partial content that the Internet video covers in each local video content, after delete processing is carried out
Multiple local video contents be spliced into all the way comprising it is described progress delete processing after multiple local video contents and background in
The local video of appearance, the background content are Transparent color content.
S504：Using FPGA, spliced institute is filled at the background content position of the local video of splicing
The content of Internet video is stated, obtains overlay video, the overlay video is exported to display screen and broadcasted.
Based on same inventive concept, additionally provided in the embodiment of the present invention a kind of corresponding with video broadcasting method for regarding
The output board that frequency broadcasts, because the principle of output board solution problem is similar to the video broadcasting method of the embodiment of the present invention, because
The implementation of this device may refer to the implementation of method, repeats part and repeats no more.
As shown in fig. 6, be output board 60 structural representation provided in an embodiment of the present invention broadcasted for video, including：
Input port 61, for receiving multiple Internet video contents, and by multiple Internet video content transmissions of reception extremely
Digital signal processor DSP；
The DSP 62, for being decoded to the multiple Internet video content, by decoded multiple Internet videos
Content is output in the PLD FPGA in the output board after being spliced into Internet video all the way；
The FPGA 63, for the multiple local video contents received from exchange chip to be spliced into local video all the way；
Overlay video is obtained after the local video of splicing and the DSP Internet video spliced are overlapped, is delivered to
Output port 64；
Output port 64, broadcasted for the overlay video to be exported to display screen.
Alternatively, the FPGA 63 is specifically used for the multiple local videos that will be received according to following steps from exchange chip
Content is spliced into local video all the way, including：
, will each originally using the FPGA according to the layout of local video content and Internet video content on the display screen
Delete processing can be carried out by the partial content that the Internet video covers in ground video content, will be multiple after progress delete processing
Local video content is spliced into the sheet for including multiple local video contents and background content after the progress delete processing all the way
Ground video.
Alternatively, the background content is Transparent color content.
Alternatively, the FPGA 63 is specifically used for being spelled the local video of splicing and the DSP according to following steps
The Internet video connect is overlapped：
Filled at the background content position of the local video of splicing in the spliced Internet video
Hold, obtain the overlay video.
Alternatively, the DSP 62 in the output board is connected with exchange chip；
The DSP62 is additionally operable to, and if necessary to broadcast the multiple Internet video content on other display screens, is then existed
After being decoded to the multiple Internet video content, by decoded multiple Internet video content transmissions to exchange chip,
By the exchange chip by decoded multiple Internet video content transmissions to being connected with other display screens
In output board.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention is the flow with reference to method, apparatus (system) and computer program product according to embodiments of the present invention
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of video broadcasting method, it is characterised in that this method includes：
Multiple Internet video contents are received by the output board of more screen controllers；Digital Signal Processing is provided with the output board
Device DSP and PLD FPGA；
The multiple Internet video content is decoded using the DSP in the output board, by decoded multiple network videos
Frequency content is output in the FPGA in the output board after being spliced into Internet video all the way；And will be from exchange using the FPGA
Multiple local video contents that chip receives are spliced into local video all the way；
It is superimposed after using FPGA, the local video of splicing and the DSP Internet video spliced are overlapped
Video, the overlay video is exported to display screen and broadcasted.
2. the method as described in claim 1, it is characterised in that it is described will be received using the FPGA from exchange chip it is multiple
Local video content is spliced into local video all the way, including：
According to the layout of local video content and Internet video content on the display screen, each will locally be regarded using the FPGA
Delete processing can be carried out by the partial content that the Internet video covers in frequency content, by multiple locals after progress delete processing
The local that video content is spliced into all the way comprising multiple local video contents and background content after the progress delete processing regards
Frequently.
3. method as claimed in claim 2, it is characterised in that the background content is Transparent color content.
4. method as claimed in claim 2 or claim 3, it is characterised in that it is described using FPGA by the local video of splicing and
The Internet video of the DSP splicings obtains overlay video after being overlapped, including：
The content of the spliced Internet video is filled at the background content position of the local video of splicing, is obtained
To the overlay video.
5. the method as described in claim 1, it is characterised in that the DSP in the output board is connected with exchange chip；
After the DSP using in the output board decodes to the multiple Internet video content, in addition to：
If necessary to broadcast the multiple Internet video content on other display screens, then by decoded multiple Internet videos
Content is transferred on exchange chip by the DSP, then by exchange chip by decoded multiple Internet video contents
It is transferred in the output board being connected with other display screens.
6. a kind of output board broadcasted for video, it is characterised in that the output board includes input port, digital signal processor
DSP, PLD FPGA and output port, wherein：
Input port, believe for receiving multiple Internet video contents, and by multiple Internet video content transmissions of reception to numeral
Number processor DSP；
The DSP, for being decoded to the multiple Internet video content, decoded multiple Internet video contents are spliced
It is output to after into Internet video all the way in the PLD FPGA in the output board；
The FPGA, for the multiple local video contents received from exchange chip to be spliced into local video all the way；Will splicing
The local video and the DSP splicing the Internet video be overlapped after obtain overlay video, be delivered to output end
Mouthful；
Output port, broadcasted for the overlay video to be exported to display screen.
7. output board as claimed in claim 6, it is characterised in that the FPGA is specifically used for will be from exchange according to following steps
Multiple local video contents that chip receives are spliced into local video all the way, including：
According to the layout of local video content and Internet video content on the display screen, each will locally be regarded using the FPGA
Delete processing can be carried out by the partial content that the Internet video covers in frequency content, by multiple locals after progress delete processing
The local that video content is spliced into all the way comprising multiple local video contents and background content after the progress delete processing regards
Frequently.
8. output board as claimed in claim 7, it is characterised in that the background content is Transparent color content.
9. output board as claimed in claim 7 or 8, it is characterised in that the FPGA is specifically used for be spelled according to following steps
The local video connect and the Internet video of DSP splicings are overlapped：
The content of the spliced Internet video is filled at the background content position of the local video of splicing, is obtained
To the overlay video.
10. output board as claimed in claim 6, it is characterised in that the DSP in the output board is connected with exchange chip；
The DSP is additionally operable to, if necessary to broadcast the multiple Internet video content on other display screens, then to described
After multiple Internet video contents are decoded, by decoded multiple Internet video content transmissions to exchange chip, pass through institute
Exchange chip is stated by decoded multiple Internet video content transmissions to the output board being connected with other display screens
In.
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| CN107888862B (en) * | 2017-11-24 | 2020-12-11 | 威创集团股份有限公司 | Signal distribution method and system applied to video splicing |
| CN111131761B (en) * | 2018-10-30 | 2022-03-25 | 杭州海康威视数字技术股份有限公司 | Distributed tiled display system and data transmission method |
| CN112243105A (en) * | 2019-07-17 | 2021-01-19 | 杭州海康威视数字技术股份有限公司 | Distributed tiled display system, method and device and electronic equipment |
| CN115426518B (en) * | 2022-08-09 | 2023-08-25 | 杭州海康威视数字技术股份有限公司 | Display control system, image display method and LED display control system |
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