CN105898558A - Video playing method and device - Google Patents
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- CN105898558A CN105898558A CN201510038761.0A CN201510038761A CN105898558A CN 105898558 A CN105898558 A CN 105898558A CN 201510038761 A CN201510038761 A CN 201510038761A CN 105898558 A CN105898558 A CN 105898558A
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Abstract
The present invention relates to the field of video processing and more particularly relates to a video playing method and device for solving the problem that a DSP occupies the slot of signal collection in an input board to cause the reduction of signal collection paths and no full utilization of the decoding performance of the DSP. The video playing method provided by the embodiment of the invention comprises a step of receiving multiple network video content through the output board of a multi-screen controller, wherein, the output board is provided with a digital signal processor (DSP) and a programmable logic device FPGA, a step of using the DSP to decode the multiple network video content, connecting the decoded multiple network video content into a path of network video, and then outputting the video into the FPGA, a step of using the FPGA to connect multiple local video content received from a switch chip into a path of local video, and a step of using the FPGA to superpose the connected local video and the network video connected by the DSP to obtain a superposition video, and outputting the superposition video to a display screen to play.
Description
Technical field
The present invention relates to field of video processing, particularly relate to a kind of video broadcasting method and device.
Background technology
Along with the development of Internet video encoding and decoding technique, many screen controllers are by only entering multiple local video content
After row splicing, upper wall shows, develops into laggard to multiple local video content and multiple Internet video content superposition
On row, wall shows, to realize many pictures mixing broadcast of local video and Internet video.
As it is shown in figure 1, realize, for many screen controllers, the system architecture schematic diagram that multi-screen broadcasts.It is deployed in input
Digital signal processor (Digital Signal Processing, DSP) in plate passes through Network Capture network video
After Pin, after being decoded it, field programmable gate array (Field-Programmable Gate is arrived in output
Array, FPGA), FPGA is transferred to power board after decoded Internet video is carried out Data Format Transform
Exchange chip, and be sent to output board by backboard；After local video inputs also by tablet, through handing over
Change chip and arrive output board；In output board, use FPGA local video and Internet video to be zoomed in and out,
Export after overlap-add procedure and on a screen, carry out display broadcast.
Understanding based on above-mentioned handling process, first, DSP is deployed in tablet, can take tablet
In carry out the groove position of signals collecting, when there being decoding requirements, signals collecting way will tail off；Next, by
In by tablet, DSP delivery outlet is limited, and a DSP is typically only capable to be decoded two-path video,
It is far from making full use of the decoding performance of DSP.
Summary of the invention
The embodiment of the present invention provides a kind of video broadcasting method and device, occupies input in order to solve DSP
The groove position of signals collecting in plate, causes signals collecting way to tail off, and does not make full use of the solution of DSP
The problem of code 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 many screen controllers；Described output board is provided with number
Word signal processor DSP and PLD FPGA；
Use the DSP in described output board that the plurality of Internet video content is decoded, after decoding
Multiple Internet video contents be spliced into a road network video after export in the FPGA in described output board；
And, use described FPGA that the multiple local video content received from exchange chip are spliced into a road and regard
Frequently；
FPGA is used the described local video of splicing and the described Internet video of described DSP splicing to be carried out
Obtain overlay video after superposition, the output of this overlay video is broadcasted to display screen.
Alternatively, multiple local video content splicing that the described FPGA of described employing will receive from exchange chip
Cheng Yilu local video, including:
According to local video content and Internet video content layout on the display screen, use described FPGA
The partial content that can be covered by described Internet video in each local video content is carried out delete processing, will enter
Multiple local video content after row delete processing be spliced into a road comprise described in carry out delete processing after many
Individual local video content and the local video of background content.
Alternatively, described background content is transparent color content.
Alternatively, described employing FPGA is by described in the described local video spliced and described DSP splicing
Internet video obtains overlay video after being overlapped, including:
Spliced described network video is filled at the background content position of the described local video of splicing
The content of frequency, obtains described overlay video.
Alternatively, the DSP in described output board is connected with exchange chip；
After the plurality of Internet video content is decoded by the DSP in the described output board of described employing, also
Including:
If needing to broadcast the plurality of Internet video content on other display screen, then by decoded many
Individual Internet video content is transferred on exchange chip by described DSP, then by exchange chip by described solution
Multiple Internet video contents after Ma are transferred in the output board being connected with other display screen described.
The embodiment of the present invention provides a kind of output board broadcasted for video, including:
Input port, is used for receiving multiple Internet video content, and the multiple Internet video contents received is passed
Transport to digital signal processor DSP；
Described DSP, for being decoded the plurality of Internet video content, by decoded multiple networks
Video content exports the PLD FPGA in described output board after being spliced into a road network video
In；
Described FPGA, for being spliced into a road by the multiple local video content received from exchange chip
Video；After the described local video of splicing and the described Internet video of described DSP splicing are overlapped
To overlay video, the output of this overlay video is broadcasted to display screen.
In the embodiment of the present invention, the DSP carrying out Internet video decoding is deployed in output board, and,
Decoded multiple Internet video contents, after being decoded multiple Internet video contents, are first spelled by DSP
It is connected into a road network video, by the FPGA in the road network video frequency output that spliced to output board, this
Sample, the multiple local video content received from exchange chip can be spliced into a road local video by FPGA
After, can export after directly the road network video that a road local video and DSP have spliced being overlapped.
DSP is deployed in output board by the embodiment of the present invention, can avoid taking in tablet and carries out signals collecting
Groove position, for signal input save amount of acquisition channels；Owing to DSP is deployed in output board, DSP is carried out
Decoding is no longer influenced by the restriction of delivery outlet, can make full use of the decoding performance of DSP；Further, at this
In bright embodiment, DSP is in addition to decoding, it is also possible to carry out the splicing of video, such that it is able to make full use of
DSP other function than decoding, takes full advantage of DSP resource.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram that many screen controllers realize that multi-screen broadcasts；
Fig. 2 (a) is the system architecture schematic diagram that in the embodiment of the present invention, many screen controllers realize that multi-screen broadcasts；
Fig. 2 (b) is the structural representation of the output board being provided with DSP and FPGA；
The video broadcasting method flow chart that Fig. 3 provides for the embodiment of the present invention one；
Fig. 4 (a) is for carry out spliced Internet video at display screen to multiple decoded Internet video contents
Schematic layout pattern on curtain；
Fig. 4 (b) is for carry out spliced local video at display screen to multiple decoded local video content
Schematic layout pattern on curtain；
Fig. 4 (c) is according to local video content layout on the display screen, the local video after processing
Content is spliced into the schematic diagram of a road local video；
Fig. 4 (d) be by local video and Internet video superposition after display effect schematic diagram；
The video broadcasting method flow chart that Fig. 5 provides for the embodiment of the present invention two；
The output board structural representation broadcasted for video that Fig. 6 provides for the embodiment of the present invention.
Detailed description of the invention
The basic thought of the embodiment of the present invention is: the DSP carrying out Internet video decoding is deployed in output board
In, and, DSP is after being decoded multiple Internet video contents, first by decoded multiple networks
Video content is spliced into a road network video, by the road network video frequency output that spliced to output board
In FPGA, so, the multiple local video content received from exchange chip can be spliced into by FPGA
After one road local video, can directly the road network video that a road local video and DSP have spliced be entered
Export after row superposition.DSP is deployed in output board by the embodiment of the present invention, can avoid taking tablet
In carry out the groove position of signals collecting, save amount of acquisition channels for signal input；Owing to DSP is deployed in output
In plate, DSP is decoded being no longer influenced by the restriction of delivery outlet, can make full use of the decoding performance of DSP；
Further, in embodiments of the present invention, DSP is in addition to decoding, it is also possible to carry out the splicing of video, thus can
To make full use of DSP other function than decoding, take full advantage of DSP resource.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Fig. 2 (a), realize, for screen controllers many in the embodiment of the present invention, the system architecture that multi-screen broadcasts
Schematic diagram；These many screen controllers include master control borad, tablet, power board and output board；Wherein, master control borad
It is connected with tablet, power board and output board, is responsible for controlling the input of video signal, processing and export.Defeated
Entering plate and output board can have multiple respectively, at least one of which output board is for realizing embodiment of the present invention function
Output board, this output board is provided with DSP and FPGA；As shown in Fig. 2 (b), for being provided with DSP
Structural representation with the output board of FPGA.Wherein, DSP is for the multiple networks inputted from output board
Video content is spliced into a road network video after being decoded, and spliced Internet video is exported extremely
In FPGA.Tablet is used for receiving multiple local video content, and uses built-in FPGA to multiple
Ground video content packing (realizes embodiment of the present invention merit by the exchange chip transmission in power board to output board
Can output board) in FPGA.After multiple local video content are spliced into a road local video by FPGA,
The Internet video of the local video of splicing with DSP splicing is superimposed output to display screen.
In addition, in order to realize broadcasting across screen of Internet video in the above-mentioned output board being provided with DSP,
Can be joined directly together with exchange chip by the DSP in this output board, decoded Internet video is led to by DSP
Crossing exchange chip to transmit to other output board, it is connect by the FPGA on other output board with from exchange chip
The local video received is overlapped display.
Based on said system framework, embodiments provide following video broadcasting method and device, now
Each inventive point of the present invention is described in detail.
Embodiment one
As it is shown on figure 3, the video broadcasting method flow chart provided for the embodiment of the present invention one, including following step
Rapid:
S301: receive multiple Internet video contents by the output board of many screen controllers；Described output board sets
It is equipped with DSP and FPGA.
In this step, under the control of master control borad, will be inputted by multiple Internet video contents of Network Capture
In output board；Here, each Internet video content is the video flowing of one section of continuous broadcast.
S302: use the DSP in described output board to be decoded the plurality of Internet video content, will
Decoded multiple Internet video content exports in described output board after being spliced into a road network video
In FPGA；And, use described FPGA the multiple local video content received from exchange chip to be spliced into
One road local video.
In this step, the multiple Internet video contents being input in output board are decoded by DSP, and according to
This multiple Internet video contents layout on display screen (such as video wall), by these multiple Internet videos
Hold and be spliced into a road network video after zooming in and out, the Internet video of splicing is exported extremely by BT1120 mouth
FPGA, as shown in Fig. 4 (a), for carrying out spliced network to multiple decoded Internet video contents
Video schematic layout pattern on the display screen.
In FPGA, first receive multiple local video content from exchange chip, according to these multiple this locality
These multiple local video content are zoomed in and out, are spliced into a road by video content layout on the display screen
Local video, as shown in Fig. 4 (b), for carrying out spliced to multiple decoded local video content
Ground video schematic layout pattern on the display screen.
S303: use the described network video that described local video and the described DSP of splicing are spliced by FPGA
Frequency obtains the overlay video of Internet video and local video after being overlapped, by the output of this overlay video to display
Screen broadcasts.
In this step, local video and the Internet video two-path video of splicing are superimposed as a road video by FPGA.
For normally broadcasting after ensureing local video and Internet video superposition, need at local video content and network
At the lap position of video content, only broadcast a kind of video content.Based on this, the embodiment of the present invention gives
Implementation below:
In S302, use multiple local video content splicing that described FPGA will receive from exchange chip
Cheng Yilu local video, including:
According to local video content and Internet video content layout on the display screen, use described FPGA
The partial content that can be covered by described Internet video in each local video content is carried out delete processing, will enter
Multiple local video content after row delete processing be spliced into a road comprise described in carry out delete processing after many
Individual local video content and the local video of background content.
Correspondingly, in S303, FPGA is used the described local video spliced and described DSP to be spliced
Described Internet video obtains overlay video after being overlapped, including:
Spliced described network video is filled at the background content position of the described local video of splicing
The content of frequency, obtains described overlay video.
Here, in FPGA, the position that local video content can be covered by Internet video content is shown
Partial video content make delete processing, as shown in Fig. 4 (c).According to local video content at display screen
On layout, will process after local video content be spliced into a road local video, wherein, spliced
In local video, background content is filled in the position not covered by local video content, after ensureing superposition
The normal display of Internet video content, can be filled to transparent color content by background content.After splicing
Internet video and when superposing of local video, local video be filled at the background content of transparent color fill
Internet video content, so, just achieves the superposition of local video and Internet video, and ensure that this locality regards
Frequency and the display effect of Internet video.As shown in Fig. 4 (d), for by after local video and Internet video superposition
Display effect schematic diagram.
Embodiment two
For broadcasting across screen of Internet video, the DSP in output board can be joined directly together with exchange chip,
Decoded Internet video is transmitted to other output board by DSP by exchange chip, on other output board
It is overlapped display with the local video received from exchange chip by FPGA.
As it is shown in figure 5, the video broadcasting method flow chart provided for the embodiment of the present invention two, including following step
Rapid:
S501: receive multiple Internet video contents by the output board of many screen controllers；Described output board sets
It is equipped with DSP and FPGA.
S502: use the DSP in described output board to be decoded the plurality of Internet video content, will
Decoded multiple Internet video content exports in described output board after being spliced into a road network video
In FPGA；If needing to broadcast the plurality of Internet video content on other display screen, then will decoding
After multiple Internet video contents be transferred on exchange chip by described DSP, then by exchange chip will
Described decoded multiple Internet video contents are transferred in the output board being connected with other display screen described.
In specific implementation process, decoded multiple Internet video contents can be transmitted directly to even by DSP
In the exchange chip connect, then it is transferred in other output board by exchange chip, by other output board
It, according to these Internet video content layouts on other display screen, is contracted by DSP or FPGA
Put, splice.Spliced Internet video can directly be exported to display screen by other output board, it is also possible to
Export after it is superposed with local video to display screen and broadcast simultaneously.
Or, if these Internet video content cloth on the display screen that the output board initially entered is corresponding
Office, identical with the layout on other display screen, then DSP directly can will complete a spliced road
Network Video Transmission is in exchange chip, by exchange chip by defeated to other for this spliced Network Video Transmission
In ejecting plate, other output board can directly output this to show display screen, it is also possible to it is regarded with this locality
Frequently export after superposition to display screen and broadcast simultaneously.
S503: according to local video content and Internet video content layout on the display screen, uses described
The partial content that can be covered by described Internet video in each local video content is carried out at deletion by FPGA
Reason, the multiple local video content after delete processing being carried out be spliced into a road comprise described in carry out delete processing
After multiple local video content and the local video of background content, this background content is transparent color content.
S504: use FPGA, fills at the background content position of the described local video of splicing and spells
The content of the described Internet video after connecing, obtains overlay video, the output of this overlay video is entered to display screen
Row broadcasts.
Based on same inventive concept, the embodiment of the present invention additionally provide a kind of corresponding with video broadcasting method
The output board broadcasted for video, solves the principle of problem and the video of the embodiment of the present invention due to this output board
Broadcasting method is similar, and therefore the enforcement of this device may refer to the enforcement of method, repeats no more in place of repetition.
As shown in Figure 6, output board 60 structural representation broadcasted for video provided for the embodiment of the present invention
Figure, including:
Input port 61, is used for receiving multiple Internet video content, and the multiple Internet video contents that will receive
Transmission is to digital signal processor DSP；
Described DSP 62, for being decoded the plurality of Internet video content, by decoded multiple nets
Network video content exports the PLD in described output board after being spliced into a road network video
In FPGA；
Described FPGA 63, for being spliced into a road originally by the multiple local video content received from exchange chip
Ground video；After the described local video of splicing and the described Internet video of described DSP splicing are overlapped
Obtain overlay video, be delivered to output port 64；
Output port 64, for broadcasting the output of described overlay video to display screen.
Alternatively, described FPGA 63 is specifically for will receive from exchange chip according to following steps multiple
Ground video content is spliced into a road local video, including:
According to local video content and Internet video content layout on the display screen, use described FPGA
The partial content that can be covered by described Internet video in each local video content is carried out delete processing, will enter
Multiple local video content after row delete processing be spliced into a road comprise described in carry out delete processing after many
Individual local video content and the local video of background content.
Alternatively, described background content is transparent color content.
Alternatively, described FPGA 63 specifically for according to following steps by splicing described local video and institute
The described Internet video stating DSP splicing is overlapped:
Spliced described network video is filled at the background content position of the described local video of splicing
The content of frequency, obtains described overlay video.
Alternatively, the DSP 62 in described output board is connected with exchange chip；
Described DSP62 is additionally operable to, if needing to broadcast the plurality of Internet video on other display screen
Content, then after being decoded the plurality of Internet video content, by decoded multiple Internet videos
Hold and be transferred on exchange chip, by described exchange chip, described decoded multiple Internet video contents are passed
It is passed in the output board being connected with other display screen described.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can use complete hardware embodiment, complete software implementation or knot
The form of the embodiment in terms of conjunction software and hardware.And, the present invention can use and wherein wrap one or more
Computer-usable storage medium containing computer usable program code (include but not limited to disk memory,
CD-ROM, optical memory etc.) form of the upper computer program implemented.
The present invention is with reference to method, device (system) and computer program product according to embodiments of the present invention
The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding
The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating
The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one
The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set
In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory
Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart
The function specified in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices
Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one
The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a video broadcasting method, it is characterised in that the method includes:
Multiple Internet video contents are received by the output board of many screen controllers；Described output board is provided with number
Word signal processor DSP and PLD FPGA；
Use the DSP in described output board that the plurality of Internet video content is decoded, after decoding
Multiple Internet video contents be spliced into a road network video after export in the FPGA in described output board；
And, use described FPGA that the multiple local video content received from exchange chip are spliced into a road and regard
Frequently；
FPGA is used the described local video of splicing and the described Internet video of described DSP splicing to be carried out
Obtain overlay video after superposition, the output of this overlay video is broadcasted to display screen.
2. the method for claim 1, it is characterised in that the described FPGA of described employing will be from friendship
The multiple local video content changing chip reception are spliced into a road local video, including:
According to local video content and Internet video content layout on the display screen, use described FPGA
The partial content that can be covered by described Internet video in each local video content is carried out delete processing, will enter
Multiple local video content after row delete processing be spliced into a road comprise described in carry out delete processing after many
Individual local video content and the local video of background content.
3. method as claimed in claim 2, it is characterised in that described background content is transparent color content.
4. method as claimed in claim 2 or claim 3, it is characterised in that described employing FPGA will splice
Described local video and described DSP splicing described Internet video be overlapped after obtain overlay video,
Including:
Spliced described network video is filled at the background content position of the described local video of splicing
The content of frequency, obtains described overlay video.
5. the method for claim 1, it is characterised in that the DSP in described output board and exchange
Chip is connected；
After the plurality of Internet video content is decoded by the DSP in the described output board of described employing, also
Including:
If needing to broadcast the plurality of Internet video content on other display screen, then by decoded many
Individual Internet video content is transferred on exchange chip by described DSP, then by exchange chip by described solution
Multiple Internet video contents after Ma are transferred in the output board being connected with other display screen described.
6. the output board broadcasted for video, it is characterised in that this output board includes:
Input port, is used for receiving multiple Internet video content, and the multiple Internet video contents received is passed
Transport to digital signal processor DSP；
Described DSP, for being decoded the plurality of Internet video content, by decoded multiple networks
Video content exports the PLD FPGA in described output board after being spliced into a road network video
In；
Described FPGA, for being spliced into a road by the multiple local video content received from exchange chip
Video；After the described local video of splicing and the described Internet video of described DSP splicing are overlapped
To overlay video, it is delivered to output port；
Output port, for broadcasting the output of described overlay video to display screen.
7. output board as claimed in claim 6, it is characterised in that described FPGA is specifically for basis
The multiple local video content received from exchange chip are spliced into a road local video by following steps, including:
According to local video content and Internet video content layout on the display screen, use described FPGA
The partial content that can be covered by described Internet video in each local video content is carried out delete processing, will enter
Multiple local video content after row delete processing be spliced into a road comprise described in carry out delete processing after many
Individual local video content and the local video of background content.
8. output board as claimed in claim 7, it is characterised in that in described background content is transparent color
Hold.
9. as claimed in claim 7 or 8 output board, it is characterised in that described FPGA specifically for
According to following steps, the described local video of splicing and the described Internet video of described DSP splicing are folded
Add:
Spliced described network video is filled at the background content position of the described local video of splicing
The content of frequency, obtains described overlay video.
10. output board as claimed in claim 6, it is characterised in that the DSP in described output board with
Exchange chip is connected；
Described DSP is additionally operable to, if needing to broadcast in the plurality of Internet video on other display screen
Hold, then after the plurality of Internet video content is decoded, by decoded multiple Internet video contents
It is transferred on exchange chip, by described exchange chip, described decoded multiple Internet video contents is transmitted
In the output board being connected with other display screen described.
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| CN111131761A (en) * | 2018-10-30 | 2020-05-08 | 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 |
| CN115426518A (en) * | 2022-08-09 | 2022-12-02 | 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 |
| CN117640992A (en) * | 2023-12-13 | 2024-03-01 | 北京拓目科技有限公司 | Video display method and system for MVPS (mechanical vapor compression system) series video processing system |
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