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Same-screen data transmission method, device and system for multimedia classroom

A data transmission method and multimedia classroom technology, applied in the field of data transmission, can solve the problems affecting the teaching and presentation effect on the same screen, limited network bandwidth, and high bandwidth occupancy rate, and achieve reasonable configuration, smooth display or playback, reduce The effect of bandwidth usage

Inactive Publication Date: 2020-01-31
HUNAN NEW CLOUDNET TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When performing demonstrations or teaching in a multimedia classroom, it is often necessary to use the same screen, such as the equipment used by the teacher to teach on the same screen as the equipment used by all students, or the equipment used by a single student to the equipment used by other students and the equipment used by other students. The device used by the teacher is used to demonstrate the teaching effect on the same screen. The device that sends data on the same screen is used as the server, and the device that receives the data is used as the client. Streaming media technology is used to send the media information on the server to multiple clients on the same screen. Due to the large number of devices in the multimedia classroom and the limited network bandwidth, packet loss is serious when the server transmits data to the client, and some clients even need to retransmit data. The existing transmission method has a high bandwidth occupation rate and affects Teaching and demonstration effect on the same screen

Method used

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  • Same-screen data transmission method, device and system for multimedia classroom
  • Same-screen data transmission method, device and system for multimedia classroom
  • Same-screen data transmission method, device and system for multimedia classroom

Examples

Experimental program
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Effect test

Embodiment 1

[0061] like figure 1 As shown, the same screen method of the multimedia classroom of the present invention comprises the following steps:

[0062] 1) Turn on the same screen function on the server side, and the server side responds to the operation and encodes the media file. The media file includes pictures, audio, video, etc. In this embodiment, pictures are taken as an example. The encoding method of this embodiment can use various methods to increase data Communication reliability methods, such as Forward Error Correction (FEC), Automatic Repeat reQuest (ARQ) and Hybrid Automatic Repeat reQuest (HARQ), because ARQ technology relies on Error code detection and retransmission requests are used to ensure signal quality, and there is a relatively serious packet loss problem in multimedia classrooms at present. Therefore, the method of this embodiment uses FEC to encode data redundantly to generate data with specified redundancy. Packets to prevent data loss, and provide the f...

Embodiment 2

[0100] like Figure 10 As shown, the method of this embodiment is basically the same as that of Embodiment 1. The difference is that in this embodiment, the server only needs to collect statistics on the collection reports sent by the client, and does not need to calculate the maximum value or intermediate value or The calculation of the average value improves the work efficiency of the server side. The collection report of this embodiment is a collection report that requests to increase or reduce redundancy. The specific steps of step 3) are:

[0101] 3.1) Receive the collection report requesting to increase redundancy and the collection report requesting to reduce redundancy returned by the client;

[0102] 3.2) Set the redundancy adjustment value to 5%, set the threshold of the number of clients to 30% of the number of all clients, and judge whether the number of clients requesting to increase redundancy exceeds the threshold of the number of clients, and if so, specify the...

Embodiment 3

[0114] The method, device and system of this embodiment are basically consistent with Embodiment 1, the difference is that, as Figure 13 As shown, the same-screen data transmission method for multimedia classrooms of this embodiment, when applied to the server side, also includes a step of reviewing the value of the specified redundancy between steps 3) and 4), specifically: judging the updated redundancy Whether the value of the redundancy is between the preset highest redundancy and the lowest redundancy, if yes, go to step 4), otherwise the value of the adjusted and updated redundancy is between the highest redundancy and the lowest redundancy Then go to step 4).

[0115] In this embodiment, the highest redundancy is set to 100%, and the lowest redundancy is set to 10%. During the transmission process, the server updates the value of the specified redundancy according to the collection report sent by the client. Get the value of the updated redundancy, and when the value ...

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Abstract

The invention discloses a same-screen data transmission method for a multimedia classroom. The same-screen data transmission method comprises the following steps: 1) encoding a current media file intoa data packet with specified redundancy according to a value of the specified redundancy and a preset matrix algorithm; 2) transmitting the data packet with the specified redundancy to a client through an RTP protocol; 3) updating the value of the specified redundancy according to a receiving report returned by the client to obtain the updated value of the redundancy; and 4) processing the next media file according to the updated redundancy value and a preset matrix algorithm. According to the invention, the occupation of bandwidth is reduced, the transmission speed is improved, and the speedof simultaneously receiving picture data by a plurality of student ends is improved through a multicast transmission mode, so that the student ends can smoothly display the screen content of the server end when the server end and the plurality of student ends are on the same screen in a wireless network environment.

Description

technical field [0001] The invention relates to a data transmission method, in particular to a same-screen data transmission method, device and system for a multimedia classroom. Background technique [0002] When performing demonstrations or teaching in a multimedia classroom, it is often necessary to use the same screen, such as the equipment used by the teacher to teach on the same screen as the equipment used by all students, or the equipment used by a single student to the equipment used by other students and the equipment used by other students. The device used by the teacher is used to demonstrate the teaching effect on the same screen. The device that sends data on the same screen is used as the server, and the device that receives the data is used as the client. Streaming media technology is used to send the media information on the server to multiple clients on the same screen. Due to the large number of devices in the multimedia classroom and the limited network b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
CPCH04L65/762H04L65/65
Inventor 陈娅芳李政军
Owner HUNAN NEW CLOUDNET TECH CO LTD
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