CN208540032U - A kind of video teaching interactive device - Google Patents
A kind of video teaching interactive device Download PDFInfo
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- CN208540032U CN208540032U CN201821290993.0U CN201821290993U CN208540032U CN 208540032 U CN208540032 U CN 208540032U CN 201821290993 U CN201821290993 U CN 201821290993U CN 208540032 U CN208540032 U CN 208540032U
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Abstract
A kind of video teaching interactive device, including student display end, code stream reader, Video Decoder, video montaging device, OSD caption adder, video encoder, video code flow buffer cell and network-side；The OSD caption adder is used to caption information being configured to each independent vision signal and spliced vision signal；The video encoder is used to carry out the video after splicing and superimposed subtitle coding compression, and compressed video is configured in video code flow buffer cell by network-side.Video teaching interactive device provided by the utility model supports packet loss functions of retransmission by (wired, wireless) the transmission video codeword data stream of network；Installation, maintenance are simple；Single device supports multiple student terminal video pictures source terminal accesses, and picture splicing is supported to handle；Video pictures exchange is able to carry out between video switching matrix equipment；Support screen image content recording compression；Equipment cost is low.
Description
Technical field
The utility model relates to a kind of video teaching interactive devices.
Background technique
In existing classroom display screen video interactive scheme, mostly using used applied to video conference based on route
The video switching matrix of exchange supports the input of the road M HDMI video signal and the output of the road N HDMI video；The shortcomings that product is
Construction is complicated, needs to dispose many video lines, very big for terminal quantity in teaching environment, the installation and maintenance of video line are
One very big problem.For team teaching mode, it is desirable that being capable of the shared display of video in group, it is also necessary to group show screen it
Between be also able to carry out video exchange and shared, the screen matrix for acquiring circuit switched is almost difficult to complete, and hardware input cost
It is very high.It is existing wireless with screen device (being based on Miracast and AirPlay), single channel wireless video signal can be passed through into Wifi
Network is output to in screen device processor, is output to display by HDMI again after being then decoded, is cooperated with video matrix
It uses, may be implemented wireless with screen and exchange；The disadvantage is that support the video pictures of multiple students, the nothing of corresponding number is needed
Line is with device is shielded, and construction and maintenance workload are big, and hardware device input cost is high.Video switching matrix equipment current simultaneously is not
Support video record function.
Utility model content
To overcome prior art problem, the utility model provides a kind of video teaching interactive device.
A kind of video teaching interactive device, including student display end, code stream reader, Video Decoder, video-splicing
Device, OSD caption adder, video encoder, video code flow buffer cell and network-side；
Each student display end successively with a corresponding code stream reader and Video Decoder
Electrical connection；Each Video Decoder is electrically connected with the video montaging device；The video montaging device is by each video
Vision signal in decoder is spliced on a screen；The video montaging device is electrically connected with the OSD caption adder, institute
OSD caption adder is stated for caption information to be configured to each independent vision signal and spliced vision signal；
For the video encoder for carrying out coding compression to the video after splicing and superimposed subtitle, compressed video passes through network
End configuration is in video code flow buffer cell.
Preferably, the video teaching interactive device includes multiple groups, and video teaching interactive device described in each group shares institute
State video code flow buffer cell and network-side.
Preferably, the OSD caption adder is electrically connected with display, and the display is for display splicing and folds
Video after captioning.
Preferably, the video code flow buffer cell is electrically connected with the controller, and the controller is for controlling each institute
State the channels of video information of video teaching interactive device transmission.
Choosing, the network-side include cable network or wireless network.
Preferably, the video code flow buffer cell is electrically connected with recording elements.
Preferably, H.264/H.265 the code stream reader is compiled according to the video source parameter of setting by network reading
The video code flow of code, and the video code flow read is pushed to the Video Decoder, the code stream reader is supported automatic
Re-transmission and forward error correction function.
Preferably, the Video Decoder supports fault-tolerant processing function, certainly when the Video Decoder breaks down
It is dynamic quickly to restart Video Decoder.
The utility model has the beneficial effects that
Video teaching interactive device provided by the utility model passes through (wired, wireless) the transmission video codeword data stream of network,
Support packet loss functions of retransmission；Installation, maintenance are simple；Single device supports multiple student terminal video pictures source terminal accesses, and props up
Hold picture splicing processing；Video pictures exchange is able to carry out between video switching matrix equipment；The compression of support screen image content
It records；Equipment cost is low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the video teaching interactive device of the utility model；
Fig. 2 is the configuration schematic diagram between the video teaching interactive device of the utility model.
Specific embodiment:
The utility model is described further with reference to the accompanying drawing: as shown in Figure 1, a kind of video teaching interactive device,
Including student display end 1, code stream reader 2, Video Decoder 3, video montaging device 4, OSD caption adder 5, Video coding
Device 6, video code flow buffer cell 7 and network-side 8；
Each student display end 1 is successively decoded with a corresponding code stream reader 2 and video
Device electrical connection；Each Video Decoder is electrically connected with the video montaging device；The video montaging device is by each view
Vision signal in frequency decoder 3 is spliced on a screen；The video montaging device 4 is electrically connected with the OSD caption adder 5
It connects, the OSD caption adder 5 is used to for caption information to be configured to each independent vision signal and spliced video is believed
On number；The video encoder is used to carry out the video after splicing and superimposed subtitle coding compression, and compressed video is logical
Video encoder 6 described in network-side is crossed for carrying out coding compression, compressed view to the video after splicing and superimposed subtitle
Frequency is by the configuration of network-side 8 in video code flow buffer cell 7.The OSD caption adder 5 is electrically connected with display 9, described
Display 9 is for the video after splicing and superimposed subtitle is locally displayed.The video code flow buffer cell 7 and controller 10
Electrical connection, the controller 10 are used to control the channels of video information that each video teaching interactive device is sent.The net
Network end 8 includes cable network or wireless network.The video code flow buffer cell 7 is electrically connected with recording elements 11.The code stream
Reader 2 reads the video code flow H.264/H.265 encoded by network, and will read according to the video source parameter of setting
Video code flow be pushed to the Video Decoder, the code stream reader supports autonomous retransmission and forward error correction function.It is described
The hardware video decoder that Video Decoder 3 is provided using embeded processor realizes that low-power consumption quickly decodes, decompression is obtained
Video pictures be pushed to video montaging device；It supports fault-tolerant processing, is quickly weighed automatically when the Video Decoder breaks down
Open Video Decoder；For the video montaging device 4 according to the display pattern such as 1x1 of setting, 2x1,2x2 etc. export Video Decoder
Video pictures zoom in and out after output to corresponding display area, and be output on display by HDMI display interface, depending on
OpenGL and OpenCL technology can be used in frequency splicer 4, gives full play to the function of hardware acceleration of embedded processing offer；It is described
OSD caption adder 5 uses OpenGL technology, and the image content that OSD subtitle to be shown and video montaging device export is carried out
It is superimposed and shows；The video encoder 6 obtains spliced video pictures from the OSD caption adder 5, and uses insertion
H.264/H.265, the hardware encoder that formula processor provides is encoded, and the video code flow after coding is pushed to video
In code stream export server；The video code flow buffer cell 7, which sends video code flow to the client accessed and provides, to be lost
Packet retransmission mechanism.The compressed video codeword data stream of screen-picture is passed through RTMP, RTSP protocol propelling to view by recording elements 11
Frequency Video Record Processor, while also supporting HTTP, Transmission Control Protocol.
As shown in Fig. 2, the video teaching interactive device includes multiple groups, video teaching interactive device described in each group shares institute
State video code flow buffer cell 7 and network-side 8.
When in use, realize that video is as follows with video-splicing (shared) function inside group equipment: student display end 1
Picture is sent to Video Decoder 3 by code stream reader 2, and 4 timing of video montaging device obtains video from Video Decoder 3
Picture data is zoomed in and out according to current display mode, then the video pictures after output scaling to corresponding display area；When
The video pictures of all areas are all filled and are finished, and spliced video pictures are pushed to OSD caption adder 5, subtitle superposition
By treated, video pictures are pushed to video encoder 6 afterwards；Video encoder 6 carries out video compress, and by compressed view
Frequency code stream is pushed in video code flow buffer cell 7；Video code flow buffer cell 7 is by network active push video code flow to
The client of access is shown.
Video interactive function between different video teaching interaction equipment is as follows: A group student pushes the student of this group
The video interactive matrix device B that the video pictures come carry out splicing, are pushed to another group after compression again, target are small
The video pictures content of A group is shown after group video matrix B decoding in its display；The similarly video switching matrix equipment B of group
Also the image content of B group student terminal is received, the video switching matrix that A group is pushed to after progress splicing, compression is set
It is standby, it is shown on the screen of A group after the decoding of A group video switching matrix；To realize the exchange function of A, B group video pictures
Energy.Here display includes each student display end 1 and display 9.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (8)
1. a kind of video teaching interactive device, it is characterised in that:
Including student display end, code stream reader, Video Decoder, video montaging device, OSD caption adder, Video coding
Device, video code flow buffer cell and network-side；
Each student display end is successively electrically connected with a corresponding code stream reader and Video Decoder
It connects；Each Video Decoder is electrically connected with the video montaging device；The video montaging device decodes each video
Vision signal in device is spliced on a screen；The video montaging device is electrically connected with the OSD caption adder, described
OSD caption adder is used to caption information being configured to each independent vision signal and spliced vision signal；Institute
Video encoder is stated for carrying out coding compression to the video after splicing and superimposed subtitle, compressed video passes through network-side
Configuration is in video code flow buffer cell.
2. video teaching interactive device according to claim 1, it is characterised in that: the video teaching interactive device includes
Multiple groups, video teaching interactive device described in each group share the video code flow buffer cell and network-side.
3. video teaching interactive device according to claim 1, it is characterised in that: the OSD caption adder and display
Device electrical connection, the display is for the video after display splicing and superimposed subtitle.
4. video teaching interactive device according to claim 2, it is characterised in that: the video code flow buffer cell and control
Device electrical connection processed, the controller are used to control the channels of video information that each video teaching interactive device is sent.
5. video teaching interactive device according to claim 1, it is characterised in that: the network-side include cable network or
Wireless network.
6. video teaching interactive device according to claim 1, it is characterised in that: the video code flow buffer cell and record
Unit electrical connection processed.
7. video teaching interactive device according to claim 1, it is characterised in that: the code stream reader is according to setting
Video source parameter reads the video code flow H.264/H.265 encoded by network, and the video code flow read is pushed to institute
Video Decoder is stated, the code stream reader supports autonomous retransmission and forward error correction function.
8. video teaching interactive device according to claim 7, it is characterised in that: the Video Decoder supports fault-tolerant place
Function is managed, quickly restarts Video Decoder automatically when the Video Decoder breaks down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821290993.0U CN208540032U (en) | 2018-08-10 | 2018-08-10 | A kind of video teaching interactive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821290993.0U CN208540032U (en) | 2018-08-10 | 2018-08-10 | A kind of video teaching interactive device |
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| Publication Number | Publication Date |
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| CN208540032U true CN208540032U (en) | 2019-02-22 |
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| CN201821290993.0U Active CN208540032U (en) | 2018-08-10 | 2018-08-10 | A kind of video teaching interactive device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109089056A (en) * | 2018-08-10 | 2018-12-25 | 南京腾优信息科技有限公司 | A kind of video teaching interactive device |
| CN112911383A (en) * | 2021-01-19 | 2021-06-04 | 深圳乐播科技有限公司 | Multipath screen projection method, device and system under local area network |
-
2018
- 2018-08-10 CN CN201821290993.0U patent/CN208540032U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109089056A (en) * | 2018-08-10 | 2018-12-25 | 南京腾优信息科技有限公司 | A kind of video teaching interactive device |
| CN112911383A (en) * | 2021-01-19 | 2021-06-04 | 深圳乐播科技有限公司 | Multipath screen projection method, device and system under local area network |
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