CN210129959U - Wireless local area network audio stream transmission system - Google Patents
Wireless local area network audio stream transmission system Download PDFInfo
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- CN210129959U CN210129959U CN201920905204.8U CN201920905204U CN210129959U CN 210129959 U CN210129959 U CN 210129959U CN 201920905204 U CN201920905204 U CN 201920905204U CN 210129959 U CN210129959 U CN 210129959U
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Abstract
The present invention relates to the field of audio streaming, and more particularly to an audio streaming system for a wireless local area network. A plurality of data receiving modules which are connected with the data sending module through the data sending module and the communication device in a communication way; the data sending module comprises a data caching module, a demultiplexing module and a plurality of data area modules which are sequentially connected; the data area modules correspond to the data receiving modules one by one, and each data area module comprises a unicast sending module; the data caching module is also in communication connection with the multicast sending module; the data receiving module comprises a unicast receiving module and a multicast receiving module; and various protocols are combined to realize reliable transmission of audio streams in the wireless local area network.
Description
Technical Field
The present invention relates to the field of audio streaming, and more particularly to an audio streaming system for a wireless local area network.
Background
Audio transmission in a wireless network faces many problems, such as the overall rate of audio transmission is reduced due to high packet loss rate of the wireless network, and network congestion is caused in the transmission process of high-rate audio streams.
The streaming media is a mode that multimedia data is continuously transmitted to a terminal and consumed by the terminal, and the transmission mode of the streaming is generated by completing the corresponding complete downloading; compared with the method that the user completely downloads and browses the multimedia files, under the condition of the multimedia files with the larger and larger sizes, the method that the user waits for the completion of downloading and browses the multimedia files is unrealistic and uneconomical; meanwhile, the streaming media can well protect the copyright of the content and the like, so that the method is more and more popular; an audio stream, which is also an important item for streaming media applications, is also widely used in internet audio transmission and transmission of high-quality audio in local area networks; however, the streaming approach also faces a number of problems. If the user does not have enough bandwidth, the heard music or sound is intermittent or waits for a long time to be cached; to solve this problem, music files themselves are compressed in various audio formats such as MP3, Vorbis, AAC, and Opus from the source of the audio stream, and then the files are packaged in various bit stream formats for transmission such as MP4, FLV, ASF, or ISMA; these bit stream formats are transported over specific transport protocols, such as RTMP or RTP, to higher level HLSs, MSSs, etc.
Various supporting network audio streaming network protocols suffer from various problems; a message protocol, such as UDP, divides a file into a plurality of data packets when transmitting an audio stream, and the transmission is simple and effective, but a defect exists in the method that whether data reach a destination cannot be guaranteed, and once the data are lost, the played sound is noisy or interrupted; another reliable protocol, such as TCP, attempts to wait when data is lost and then requests retransmission of the lost data packet, but this waiting and retransmission mechanism results in new data delay.
The unicast protocol sends a copy of data from a server to each client, and a good balance point is found between reliable data transmission and delay, but the unicast protocol has the defect that the requirement of concurrency cannot be met, logically, the unicast protocol is in a star-shaped network structure, and the transmission efficiency is reduced due to the fact that more servers are accessed, the load is higher.
The multicast protocol, which attempts to solve the server load problem, only sends data to the clients interested in these data, but the multicast is unidirectional, and if there are any control requests by the clients, it cannot meet the corresponding requirements, especially in the case of a network, the handling of the multicast protocol introduces two special methods: the method comprises the steps of transmitting a communication indication message DTIM and a beacon interval, in order to reduce radiation of a wireless network and mutual interference of network signals, under the condition of no data communication, switching the working mode of a node to a power saving mode, when no node in the wireless network works in the power saving mode, the communication is as effective as that of a wired network, when the node enters the power saving working mode, a data transmitting node only transmits a multicast data packet after the DTIM interval, the interval of the DTIM is between 102.4 milliseconds and 204.8 milliseconds, the transmission rate is reduced to 1Mbits to 6Mbits, the resolution of sound delay of human ears is 17 milliseconds, and the audio stream transmission brings a bad effect to a user.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multiple agreement combines, realizes the reliable transmission of audio stream in wireless local area network, low bandwidth consumption's method and the device that corresponds.
The technical scheme of the utility model as follows:
a wireless local area network audio stream transmission system is characterized by comprising a data sending module and a plurality of data receiving modules which are in communication connection with the data sending module through a communication device; the data sending module comprises a data caching module, a demultiplexing module and a plurality of data area modules which are sequentially connected; the data area modules correspond to the data receiving modules one by one, and each data area module comprises a unicast sending module; the data caching module is also in communication connection with the multicast sending module; the data receiving module comprises a unicast receiving module and a multicast receiving module.
The communication device comprises WiFi or a wireless local area network.
The data receiving module also comprises an audio data decoding module.
The data caching module comprises multi-channel audio data.
A method for wireless local area network audio streaming, comprising the steps of:
step 1: preparing multi-channel audio data;
step 2: inquiring whether unicast is needed;
and step 3: skipping to the step 4 without unicast, and skipping to the step 7 without unicast;
and 4, step 4: demultiplexing;
and 5: transmitting audio data by unicast;
step 6: receiving unicast sending audio data, and skipping to step 9;
and 7: transmitting audio data by multicast;
and 8: receiving multicast audio data;
and step 9: and decoding the audio data and repeating the step 1.
The utility model has the advantages that: the bandwidth consumption is effectively reduced, the data transmission reliability is improved, the audio clock synchronization can achieve the purposes of rapidness and accuracy, and meanwhile, the method is easy to implement and low in cost.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
Wherein: FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic flow chart of the present invention;
in the drawing, 101 is multi-channel audio data, 102 is a demultiplexing module, 103 is single-channel audio data, 104 is a unicast sending module, 105 is a unicast receiving module, 106 is a multicast receiving module, 107 is an audio data decoding module, 108 is a data receiving module, 109 is a multicast sending module, 110 is a data sending module, and 111 is a data caching module.
Detailed Description
Referring to fig. 1, a wireless local area network audio streaming system includes a data transmission module 110 and a plurality of data reception modules 108 communicatively connected to the data transmission module through a communication device; the data sending module comprises a data caching module 111, a demultiplexing module 102 and a plurality of data area modules which are connected in sequence; the data area modules correspond to the data receiving modules one by one, and each data area module comprises a unicast sending module 104; the data caching module is also in communication connection with the multicast sending module 109; the data receiving module comprises a unicast receiving module 105 and a multicast receiving module 106; the data receiving module further comprises an audio data decoding module 107; the data buffer module comprises multi-channel audio data 101. The whole system consists of a data sending module (a transmitting end) and a plurality of data receiving modules (receiving ends), and data are transmitted through WiFi or wireless local area networks. The transmitting end is composed of multi-channel audio data 101 in a data buffer module 111 and a demultiplexing module (demultiplexing component) 102, the data of the multi-channel audio data can be transmitted to the demultiplexing module, after demultiplexing, the multi-channel mixed data are respectively stored in respective special data areas, namely single-channel audio data 103, and the channel data can be sent out through a unicast sending module 104 in a unicast mode; or under the condition of not needing demultiplexing, the data of the multi-channel audio data can also be sent out through the multicast sending module 109; the data receiving module 108 is composed of a unicast receiving module 105 and a multicast receiving module 106, and can receive data through unicast or multicast, and the received data is decoded by the audio data decoding module 107 and then played.
A wireless local area network audio streaming system, comprising the steps of:
step 1: preparing multi-channel audio data;
step 2: inquiring whether unicast is needed;
and step 3: skipping to the step 4 without unicast, and skipping to the step 7 without unicast;
and 4, step 4: demultiplexing;
and 5: transmitting audio data by unicast;
step 6: receiving unicast sending audio data, and skipping to step 9;
and 7: transmitting audio data by multicast;
and 8: receiving multicast audio data;
and step 9: and decoding the audio data and repeating the step 1.
The processing flow of the method is shown in fig. 2. After preparing multi-channel audio data, inquiring whether unicast transmission is needed; if necessary, channel data are separated through demultiplexing and then sent through a unicast protocol, and received data are transmitted to decoding and playing; otherwise, the data is directly sent by multicast, and the data is also sent to decoding and playing after being received.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the techniques of the present invention are substantially any simple modification and equivalent changes to the above embodiments, all falling within the protection scope of the present invention.
Claims (4)
1. A wireless local area network audio stream transmission system is characterized by comprising a data sending module and a plurality of data receiving modules which are in communication connection with the data sending module through a communication device; the data sending module comprises a data caching module, a demultiplexing module and a plurality of data area modules which are sequentially connected; the data area modules correspond to the data receiving modules one by one, and each data area module comprises a unicast sending module; the data caching module is also in communication connection with the multicast sending module; the data receiving module comprises a unicast receiving module and a multicast receiving module.
2. A wireless local area network audio streaming system according to claim 1 wherein said communication means comprises WiFi or a wireless local area network.
3. The wireless local area network audio streaming system of claim 1 wherein said data receiving module further comprises an audio data decoding module.
4. The wireless local area network audio streaming system of claim 1 wherein the data buffer module comprises multi-channel audio data.
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| CN201920905204.8U CN210129959U (en) | 2019-06-17 | 2019-06-17 | Wireless local area network audio stream transmission system |
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| CN201920905204.8U CN210129959U (en) | 2019-06-17 | 2019-06-17 | Wireless local area network audio stream transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187778A (en) * | 2020-09-24 | 2021-01-05 | 烽火通信科技股份有限公司 | FLV data transmission method, system, device and readable storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187778A (en) * | 2020-09-24 | 2021-01-05 | 烽火通信科技股份有限公司 | FLV data transmission method, system, device and readable storage medium |
| CN112187778B (en) * | 2020-09-24 | 2022-07-08 | 烽火通信科技股份有限公司 | FLV data transmission method, system, device and readable storage medium |
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