CN205105318U - Real -time video device of imparting knowledge to students - Google Patents

Abstract

The utility model discloses a real -time video device of imparting knowledge to students, include: the camera, microprocessor contains the net gape interface, and microprocessor links to each other with the camera, and microprocessor is used for receiving the teaching video that the camera was recorded to carry out streaming media encapsulation format conversion and streaming media transfer protocols conversion acquisition streaming media data flow to teaching video, wireless visit access point links to each other with microprocessor, and wireless visit access point and/or net gape interface are through the network with streaming media stream data transmission to the customer end and the communication request that is used for acquireing the streaming media data flow of receiving that the customer end sends, wherein, when application is served in microprocessor operation teaching for the registration and the session of establishment real time transport protocol of the input/output of control teaching news, the asynchronous processing of teaching incident, teaching event handling function. Through above -mentioned technical scheme, solved network teaching equipment configuration technical problem loaded down with trivial details, with high costs among the prior art, simplify configuration, reduce cost.

Description

A kind of real-time video instructional device

Technical field

The utility model relates to multimedia technology field, particularly a kind of real-time video instructional device.

Background technology

Along with the development of science and technology, educational undertaking have also been obtained and develops fast, and teaching method also becomes variation, except aspectant classroom instruction, have also appeared remote teaching such as comprising correspondence, television teaching, distance teaching, the Web-based instruction.

The Web-based instruction is a kind of important form of remote teaching, utilize computer equipment and Internet technology to carry out the teaching pattern of information education to student, do not limit by region, under teaching mode of network, student can enter for the course that unit offers completely at home, eliminate labor way to hurry back and forth, save time and efforts, significantly increase the convenience of study.But the equipment of the Web-based instruction of the prior art needs multiple stage computer equipment usually, configure loaded down with trivial details, with high costs.

Visible, in prior art there is configuration technical problem loaded down with trivial details, with high costs in Web-based instruction equipment.

Utility model content

The utility model embodiment provides a kind of real-time video instructional device, solves the technical problem that in prior art, Web-based instruction Equipments Setting is loaded down with trivial details, with high costs, simplifies configuration, reduces costs.

A kind of real-time video instructional device of the embodiment of the present application, this device comprises:

Camera, for real-time recording instructional video;

Microprocessor, comprise network interface interface, described microprocessor is connected with described camera, the described instructional video that described microprocessor is recorded for receiving described camera, and carries out the conversion of Streaming Media encapsulation format and Streaming transfer protocol conversion acquisition streaming media data stream to described instructional video;

Wireless access points, be connected with described microprocessor, described streaming media data stream is transferred to client by network and receives the communication request being used for obtaining described streaming media data stream that described client sends by described wireless access points and/or described network interface interface;

Wherein, described microprocessor is provided with Teaching Service application program, when described microprocessor runs described Teaching Service application program, for the asynchronous process of the input and output of message of controlling to impart knowledge to students, teaching event, teaching event process function registration, create RTP session.

Optionally, this real-time video instructional device also comprises: earphone, is connected with described microprocessor, for exporting speech data; Microphone, is connected with described microprocessor, for inputting speech data.

Above-mentioned one or more technical scheme in the embodiment of the present application, at least has following technique effect:

By being equipped with camera, microprocessor and wireless access points for real-time video instructional device, microprocessor utilizes network tunnel transports Streaming Media by network interface interface or wireless access points, the instructional video that camera is taken is converted to Streaming Media and imports network into, stable streaming media service is provided to client user, all can access network the client such as mobile phone, pad, personal computer all by logging in assigned ip address, can only can obtain relevant instructional video information.The real-time video instructional device that the embodiment of the present application provides, configuration is simple, solves the technical problem that in prior art, Web-based instruction Equipments Setting is loaded down with trivial details, with high costs, simplifies configuration, reduces cost.

Accompanying drawing explanation

The structural representation of a kind of real-time video instructional device that Fig. 1 provides for the embodiment of the present application;

The software and hardware configuration schematic diagram of a kind of real-time video instructional device that Fig. 2 provides for the embodiment of the present application;

The block schematic illustration of the Teaching Service application program that Fig. 3 provides for the embodiment of the present application.

Embodiment

In the technical scheme that the embodiment of the present application provides, camera is comprised by providing one, the real-time video instructional device of microprocessor and wireless access points, network tunnel transports Streaming Media is utilized by network interface interface or wireless access points by microprocessor, the instructional video that camera is taken is converted to Streaming Media and imports network into, stable streaming media service is provided to client user, client all can be correlated with instructional video information by logging in assigned ip address acquisition, thus Web-based instruction Equipments Setting is loaded down with trivial details in solution prior art, technical problem with high costs, simplify configuration, reduce costs.

Below in conjunction with accompanying drawing, the main of the embodiment of the present application technical scheme is realized principle, embodiment and be explained in detail the beneficial effect that should be able to reach.

Embodiment

With reference to figure 1, the embodiment of the present application provides a kind of real-time video instructional device, and this device comprises:

Camera 12, for real-time recording instructional video;

Microprocessor 11, comprise network interface interface 14, described microprocessor 11 is connected with described camera 12, the described instructional video that described microprocessor 11 is recorded for receiving described camera 12, and the conversion of Streaming Media encapsulation format and Streaming transfer protocol conversion acquisition streaming media data stream are carried out to described instructional video;

Wireless access points 13, be connected with described microprocessor 11, described streaming media data stream is transferred to client by network and receives the communication request being used for obtaining described streaming media data stream that described client sends by described wireless access points 13 and/or described network interface interface 14;

Wherein, described microprocessor 11 is provided with Teaching Service application program, when described microprocessor 11 runs described Teaching Service application program, for the asynchronous process of the input and output of message of controlling to impart knowledge to students, teaching event, teaching event process function registration, create RTP (Real-timeTransportProtocol, RTP) session.

Concrete, the model of camera 12Camera can select OV7670, microprocessor 11 can select FreescaleIMX28 (ARM9 kernel) acp chip of Freescale, and the model of wireless access points 13 i.e. WiFiAP (being called for short WiFi in figure) can select LSD5WF-3060.Wherein, the dominant frequency of FreescaleIMX28 (ARM9 kernel) acp chip, up to 454MHz, extends out 128MBDDR2,256MBNandFlash.

Please refer to Fig. 2, in hardware configuration, microprocessor 11 comprises serial line interface 15Serialport, network interface interface 14, and serial line interface 15 may be used for external miscellaneous equipment, arranges microprocessor etc., and network interface interface is used for access network.Accordingly, software merit rating installs (SuSE) Linux OS for microprocessor 11, linux kernel drives for serial line interface 15 achieves serialport, drive for network interface interface 14 achieves Ethernet, drive for camera 12 achieves Camera, drive for wireless access points 13 achieves WiFi, and provide Teaching Service (TeachingServer) application program for teaching task, wherein TeachingServer application program is connected with corresponding driving by TeachingServer interface.Certainly, the embodiment of the present application provides real-time video instructional device can also provide earphone and microphone, is connected respectively with described microprocessor 11.Speech data is exported to user by earphone; Speech data is inputted to microprocessor 11 by microphone.

Please refer to Fig. 3, the general frame of TeachingServer comprises: environment for use module and UsageEnvironment module, basic environment for use module and BasicUsageEnvironment module, web socket multicast module and GroupSock module and real-time media module and LiveMedia module.

Wherein, UsageEnvironment module is abstract to system environments, comprises abstract class UsageEnvironment and task scheduling event processing module and TaskScheduler.UsageEnvironment is mainly used in input and output and the integration of user interaction functionality of message; The asynchronous process of TaskScheduler realization event, the registration etc. of event handling function, it realizes the process to events such as such as communication information arrival by the asynchronous reading source of maintenance one, realizes dispatching the time delay of other registration function by using time delay queue DelayQueue.This module also comprises a hash algorithm table HashTable class, can use it in whole project.Program designer, by this abstract subclass of class UsageEnvironment and TaskScheduler class self-defined, just can run, not need to carry out too much amendment in specific environment (as graphic user interface gui environment).

BasicUsageEnvironment module is the realization of a control desk application of UsageEnvironment.It carries out specific implementation for the input and output of control desk and signal response.

GroupSock module is for realizing transmission and the reception of packet.GroupSock is mainly designed to support multicast, and meanwhile it also supports unicast communication completely.

LiveMedia module is the most important module of TeachingServer.This module asserts abstract class Medium, other all classes all derive from from such, briefly introduce these classes below: a), real time streaming transport protocol client RTSPClient: such realizes the parsing of transmission that real time streaming transport protocol RTSP asks and response, creates corresponding realtime transmission protocol RTP session according to the result of resolving simultaneously.B), media session MediaSession: for representing a RTP session, a MediaSession may comprise multiple sub-session (MediaSubSession), and sub-session can be the sub-session of audio frequency, the sub-session of video etc.C), RTCP Real-time Transport Control Protocol class RTCPInstance: such realizes the communication of rtcp protocol.D), source class Source and groove class Sink: these two concept cluster are like the filter F ilter in DirectShow (a new generation that Microsoft releases on the basis of ActiveMovie and VideoforWindows is based on the kit of the Streaming Media process of COM (ComponentObjectModel)).Data source that Source is abstract, reads data as by RTP.Sink is the abstract of data consumer, is such as stored into file receiving data, and this file is exactly a Sink.The flowing of data may through multiple Source and Sink.Media slots class MediaSink is the base class of various types of Sink, and source of media class MediaSource is the base class of all kinds Source, and namely the support of various types of stream media format and coding is by realizing the derivation of these two classes.Source and Sink is linked together by RTP session (MediaSubSession).

When microprocessor 11 runs Teaching Service application program, complete an interaction of multimedia information and mainly perform following steps:

1, RTSP server is created

Build a RTSP server by RTSPServer class, such defines a RTSPClientSession class therein, for the treatment of independent client sessions simultaneously.

First RTSP server (specific implementation class is dynamic realtime flow host-host protocol service DynamicRTSPServer) is created, in constructive process, first set up Socket (ourSocket, socket) monitor at 554 ports of TCP, then connection handling function handle (RTSPServer::incomingConnectionHandler) and socket handle are passed to task dispatcher (taskScheduler).

Task dispatcher is put into select below socket handle and is called the socket handle collection (fReadSet) used, and socket handle and incomingConnectionHandler handle is associated simultaneously.Then, main program starts the major cycle (doEventLoop) entering task dispatcher, and in major cycle, calling system function select blocks, and waits for that network connects.

When RTSP client input (rtsp: // 192.168.1.109/1.mpg) connection server, select returns corresponding scoket, and then according to the corresponding relation preserved above, alignment processing function handle can be found, and create RTSPClientSession, start to process the session of this client.

2, command analysis

1), RTSP server receives the connection request of client, establishes RTSPClientSession class, processes independent client sessions.In the process setting up RTSPClientSession, newly-established socket handle (clientSocket) and RTSP request process function handle RTSPClientSession::incomingRequestHandler are passed to task dispatcher, by task dispatcher, both is associated one to one.After client sends RTSP request, the select in server major cycle calls and returns, and finds corresponding incomingRequestHandler according to socket handle, starts Message Processing.First carry out the parsing of message, if discovery request is OPTIONS, enter handleCmd_OPTIONS function.

2), according to the suffix (being such as 1.ts) of client-requested URL, call member function DynamicRTSPServer::lookupServerMediaSession and search corresponding stream media information ServerMediaSession.If ServerMediaSession does not exist, but there is 1.ts file in this locality, then the ServerMediaSession that establishment one is new.In establishment ServerMediaSession process, according to file suffixes .ts, create sub-conversation description MPEG2TransportFileServerMediaSubsession, then create index file MPEG2TransportStreamIndexFile according to extension name .tsx.Finally complete the SDP (SessionDescriptionProtocol in assembling response message by ServerMediaSession, Session Description Protocol) information (SDP assembling process is shown in description below), then response message is issued client, complete an interacting message.

SDP message groups process of assembling: ServerMediaSession is responsible for producing the public descriptor of session, and sub-conversation description is produced by MPEG2TransportFileServerMediaSubsession.MPEG2TransportFileServerMediaSubsession generates session description information in his father class members function OnDemandServerMediaSubsession::sdpLines ().The inside is realized at sdpLines (), create frame source FramedSource (specific implementation class is ByteStreamFileSource) and the RTPSink (specific implementation class is SimpRTPSink) of an imaginary dummy, finally call setSDPLinesFromRTPSink (...) member function and generate sub-conversation description.

In above-described embodiment, by containing an embedded TeachingServer in the (SuSE) Linux OS of microprocessor 11, instructional video is recorded by camera 12, data are preserved through microprocessor 11, be sent to embedded TeachingServer in real time, deliver to Ethernet through network interface interface 14 and/or wireless access points 13, transmitted by the network environment of Internet, realize the requirement of real-time video transmission.Client directly can carry out real time access by browser.

By the one or more technical schemes in the embodiment of the present application, following technique effect can be realized:

1) make the mode of intelligence transmission various, place and the flexible form of study are changeable, therefore can attend class whenever and wherever possible.Student can also through the multiple different pipeline study such as the Internet, APP, webpage.

2) more opportunity to study is provided, expands the cost of teaching scale, teaching of improving the quality of teaching, reduce.

3) multiple terminal equipment is supported: IPAD, IPHONE, Android, PC (windows).PC version possesses the webpage version control under windows system, is conducive to various equipment access.

4) terminal equipment does not need to increase any extra device or part, utilizes the wifi module carried can realize access, easy to use, does not consume 3G campus network.

5) support the multiple Streaming transfer protocol such as stream media format and RTP, HTTP, FMS such as TS, MP4,3GP, FLV, ensure the compatibility to terminal player.

6) can support multichannel user, cost is low.

7) authentication management to terminal use's accessing Internet is provided.

Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.

Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.

Claims (2)

1. a real-time video instructional device, is characterized in that, described real-time video instructional device comprises:

Camera, for real-time recording instructional video;

Microprocessor, comprise network interface interface, described microprocessor is connected with described camera, the described instructional video that described microprocessor is recorded for receiving described camera, and carries out the conversion of Streaming Media encapsulation format and Streaming transfer protocol conversion acquisition streaming media data stream to described instructional video;

Wireless access points, be connected with described microprocessor, described streaming media data stream is transferred to client by network and receives the communication request being used for obtaining described streaming media data stream that described client sends by described wireless access points and/or described network interface interface;

Wherein, described microprocessor is provided with Teaching Service application program, when described microprocessor runs described Teaching Service application program, for the asynchronous process of the input and output of message of controlling to impart knowledge to students, teaching event, teaching event process function registration, create RTP session.

2. real-time video instructional device as claimed in claim 1, it is characterized in that, described real-time video instructional device also comprises:

Earphone, is connected with described microprocessor, for exporting speech data;

Microphone, is connected with described microprocessor, for inputting speech data.