CN103812842A

Movatterモバイル変換

Info

Publication number: CN103812842A
Application number: CN201210457095.0A
Authority: CN
Inventors: 孙建伟; 马跃; 杨海波; 贾正峰; 于碧辉; 卜立平
Original assignee: Shenyang Institute of Computing Technology of CAS
Current assignee: Shenyang Institute of Computing Technology of CAS
Priority date: 2012-11-14
Filing date: 2012-11-14
Publication date: 2014-05-21

Abstract

The invention provides a streaming media switching matrix and broadcasting control method thereof for network broadcast. The streaming media switching matrix for the network broadcast comprises an audio input module, an audio switching unit and an audio output module. The streaming media switching matrix broadcasting control method for the network broadcast comprises confirming the number of matrix input sources and output frequencies through system configuration, generating crossing matrixes and corresponding crossing switches and performing EPG (Electronic Program Guide) program editing according to every output frequency demand and enabling a system to obtain input streams from input sources of different types to be sent to the crossing matrixes, enabling the crossing switches of the crossing matrixes to be switched on or switched off according to an EPG program editing result, recombining the input streams according to time and forming into a plurality of audio streams. According to the streaming media switching matrix and the broadcasting control method thereof for the network broadcast, existing live programs and audio resources of a broadcasting station are combined to form into colorful network frequencies through an audio switching matrix and a plurality of network frequencies can share an identical direct broadcasting room to save invest.

Description

For Streaming Media switching matrix and the broadcast control method thereof of Web broadcast

Technical field

The present invention relates to the online Broadcast Control technology in broadcasting station in Networks and Communications field, specifically a kind of Streaming Media switching matrix and broadcast control method thereof for Web broadcast.

Background technology

The fast development of mobile Internet provides new communication channel for broadcasting station.Mobile Internet has been broken original broadcasting station by the restriction of FM/AM frequency frequency range, broadcasting station can need according to self or audient's demand is offered arbitrarily web channel, builds new situation so the pattern of a direct broadcasting room of a frequency of traditional broadcast can cause cost of investment cannot adapt to more greatly network.Network is all to adopt Streaming Media output, and current Audio conversion matrix for traditional broadcast cannot meet the switching controls demand to Streaming Media input and Streaming Media are exported.In addition how the resources such as radio station existing programme televised live, historical program and other audio frequency are carried out to effective Combination application and also lack at present effective means in network.

Summary of the invention

For above shortcomings part in prior art, the technical problem to be solved in the present invention is to provide a kind of Streaming Media switching matrix for Web broadcast and uses the Web broadcast broadcast control method of this switching matrix.

The technical scheme that the present invention adopted is for achieving the above object: a kind of Streaming Media switching matrix for Web broadcast, comprises audio frequency input module, Audio conversion unit and audio frequency output module;

Described audio frequency input module, audio-source is connected with Audio conversion unit, for the audio stream of dissimilar, different compressed format, different sample rates being unified into of the same type, same to compressed format, audio stream with sample rate;

Described Audio conversion unit, connects audio frequency input module and audio frequency output module, for audio stream data was after reunification reconfigured according to the time, forms multiple new audio streams, outputs to audio frequency output module;

Described audio frequency output module, connects Audio conversion unit, for converting respectively the audio frequency circulation of Audio conversion unit output to RTSP stream, HTTP Live Steaming stream, sound card output stream and document flow, forms different networks.

Described audio frequency input module comprises RTSP Stream Client interface module, Http Stream Client interface module, sound card interface module, file input interface module, input abstraction interface module, Transcoding module and Resamples module;

Described RTSP Stream Client interface module is connected to input abstraction interface module, for the RTSP audio stream of plugging into;

Described Http Stream Client interface module is connected to input abstraction interface module, for the HTTP LiveSteaming audio stream of plugging into;

Described sound card interface module is connected to input abstraction interface module, for the audio stream of the sound card output of plugging into;

Described file input interface module is connected to input abstraction interface module, for the file output audio stream of plugging into;

Described input abstraction interface module one end connects RTSP Stream Client interface module, Http Stream Client interface module, sound card interface module and file input interface module, and the other end is connected with Transcoding module,

Described Transcoding module one end connects input abstraction interface module, and the other end connects Resamples module,

By carried out the transcoding of audio frequency Codec by normalized audio stream, convert audio stream to unified compressed format;

Described Resamples module connects Transcoding module and Audio conversion unit, and the audio stream after unified compressed format is carried out to sample rate unification.

Described Audio conversion unit comprises cross matrix and EPG control unit;

Described cross matrix is made up of multiple inlet flows and multiple output stream, and the intersection point place of each inlet flow and output stream arranges cross bar switch;

Described EPG control unit is the man-machine interface of controlling cross bar switch.

Described cross bar switch is the derailing switch for controlling corresponding inlet flow and output stream break-make.

Described audio output unit comprises unified output interface module, RTSP server module, HTTP streaming media server module, sound card output module and file output module.

For a Streaming Media switching matrix broadcast control method for Web broadcast, comprise the following steps:

Step 1: carry out system configuration, determine Input matrix source number and output frequency number, produce cross matrix and corresponding cross bar switch, and carry out EPG according to the demand of each output frequency and compile single;

After step 2:EPG compiles and singly completes, system is obtained inlet flow from dissimilar input source, delivers in cross matrix, and the cross bar switch of cross matrix compiles unijunction fruit time opening or cuts out according to EPG, inlet flow was reconfigured according to the time, form multiple new audio streams.

It is singly to set corresponding cross bar switch unlatching or the process of shut-in time according to the requirement of output stream that described EPG compiles.

Described input source comprises sound card input source, RTSP input source, HTTP input source and file input source.

Described RTSP input source and described HTTP input source, the method that adopts anticipation to look ahead: in the time that next demand is switched RTSP stream or the input of HTTP stream, a period of time connects in advance, carries out quick seamless handoff in the time that arrive in switching time.

Described file input source adopts the mechanism of hardware timing.

The present invention has the following advantages and beneficial effect:

By the present invention for broadcasting station, various places build Web broadcast provide a kind of fast, method easily, can the existing frequency programme televised live in broadcasting station and existing audio data, by the switching law of Audio conversion defined matrix, form dissimilar network, carry out towards minority " narrow broadcast " technical conditions are provided to radio station in cybertimes;

2. can allow broadcasting station make network by the present invention time, can use the multi-form input sources such as RTSP, HTTP, sound card input, audio file, horn of plenty audio content provides guarantee;

3. can allow broadcasting station network Broadcast Control personnel, according to the mode of What You See Is What You Get, multiple input is controlled to selection by the present invention, export different networks, realize very efficiently thematic network radio station;

4. can move to network for the original frequency in radio station by the present invention time, carry out replacing advertisement according to the EPG of automatic broadcast system, the advertisement that network is broadcasted is different with the advertisement that radio station FM/AM broadcasts, for radio station business revenue provides new approach;

5. can make multiple networks share same direct broadcasting room by the present invention, save investment.

Accompanying drawing explanation

Fig. 1 is system configuration composition diagram of the present invention.

Embodiment

Below in conjunction with drawings and Examples, the present invention is described in further detail.

As shown in Figure 1, in the present invention, for the Streaming Media switching matrix of Web broadcast, comprise following part: audio frequency input module, Audio conversion unit and audio frequency output module.Audio stream data is exported to audio output unit through Audio conversion unit from above-mentioned audio frequency input module, the corresponding relation of matrix switch and then the input and output of change audio stream in EPG control unit control Audio conversion unit.

Its sound intermediate frequency input module comprises RTSP Client, Http Stream Client, sound card and the file input interface dissimilar audio resource of plugging into, then via input abstraction interface by the dissimilar audio resource also consolidation form that standardize.Carried out the transcoding of audio frequency Codec via Transcoding module by normalized audio stream, convert audio stream to pre-configured compressed format, carry out sample rate unification via Resamples again, by the each assembly of above-mentioned audio frequency input module, the audio stream data of dissimilar, different compressed format, different sample rates is unified into of the same type, same to compressed format, audio stream with sample rate, for processing Audio conversion unit.

Described Audio conversion unit is made up of switching matrix and EPG control unit, wherein switching matrix is the matrix by N input M output, inputting between the each output of M for N has cross bar switch whether to control connection, if certain road input audio frequency input A will output to audio frequency output A ' above, so only the cross bar switch between A and A ' need to be opened.If it is upper that multichannel voice frequency output will be input to same output, switching matrix will carry out audio mixing operation automatically according to the quantity of this output cross switch in opening so.Switching matrix can be realized and supports input and output to go to many outputs by opening the upper multiple cross bar switches of same input.Wherein, the opening and closing of cross bar switch are by the control of EPG control unit.EPG control unit will be controlled the cross bar switch of switching matrix according to the output content of predefined every output, time sequencing, EPG control unit provides man-machine interface, with the source the relevant cross bar switch of timing controlled that facilitate user to define the mode of output way and output, export by timing definition.

Described audio frequency output module receives from the audio stream of Audio conversion unit output, and the mode that converts respectively the audio stream of standard to RTSP stream, HTTP Live Steaming stream, sound card output stream and document flow via unified output interface enters respectively the concrete output module to correspondence.In RTSP stream, audio stream can be packaged in RTP packet.In HTTP Live Steaming, audio stream is fragmented into the small documents of aac or ts form, and generates m3u8 file.At sound card output module, audio stream is converted into PCM data and writes corresponding sound card.In the time of file output, audio stream is carried out to transcoding, preserve into the file of WAV, MP3 or S48 form.

In the present invention, also relate to a kind of Streaming Media switching matrix broadcast control method for Web broadcast, comprise the following steps:

(1) start to carry out system configuration, main configuration comprises that configuration, output frequency configuration and the EPG of input source compile single.

(1.1) configuration of described input source mainly comprises employing rate, every sampling BIT number and the voice-grade channel number (monophony or stereo) of the input of configuration sound card and input audio frequency, RTSP source and HTTP source mainly configure URL address, authentication username password and host-host protocol and audio format, and file is inputted path and the form of main configuration file.

(1.2) the described output frequency configuration main configuration number of output frequency and the output type of output frequency.

(1.3) can determine the value of Input matrix source N and output frequency number M by the configuration of above-mentioned (11) and (12), then produce NxM matrix and corresponding cross bar switch, and compile single according to the demand of each output frequency to output odds output audio, the i.e. timing to the each cross bar switch in NxM matrix, specifies its opening and closing time.

(2) compile and singly complete, system can be started working, and system can be obtained audio frequency input from dissimilar input source respectively, then delivers in switching matrix, and the cross bar switch of switching matrix is according to compiling the time opening singly carrying out or cutting out output frequency audio producing.

(2.1) if sound card input corresponding be the tone frequency channel wire access of the original frequency in broadcasting station, switching matrix can read in advance for electronic program list, then switch and close corresponding cross bar switch in the time spot of original frequency, open other cross bar switches and reach the function of replacing original frequency advertisement;

(2.2) if sound card input corresponding be the tone frequency channel wire input of sound console between network direct broadcasting, switching matrix can be linked into respectively different output network frequencies as required, thereby reaches without adjusting any equipment or cable, the function of multiplexed network direct broadcasting room;

(2.3) RTSP/HTTP source input audio frequency, first connect owing to needing to set up in the process of switching, just can obtain audio frequency by authentication, there is larger time delay, therefore in the time realizing, the method that adopts anticipation to look ahead, in the time that next demand is switched the input of RTSP/HTTP network flow, x first connects second in advance, realizes quick seamless handoff while waiting arrive switching time, and wherein the value of x is arranged respectively by the difference to source.

(2.4) if the words of file input source, realizing in the process of file fluidisation, adopt the speed that reads coding output speed and Streaming Media of hardware mechanism file regularly consistent, prevent the too fast of file fluidisation or cross audio discontinuity or terminal buffer slow and that cause and overflow.

(3) method for building up of switching matrix output stream is followed corresponding output type standard, and in order to guarantee large-scale concurrent accesses network frequency audio stream, system adopts the method that is placed on stream media distribution server in switching matrix rear end.

Claims

1. for a Streaming Media switching matrix for Web broadcast, it is characterized in that, comprise audio frequency input module, Audio conversion unit and audio frequency output module;

2. the Streaming Media switching matrix for Web broadcast according to claim 1, it is characterized in that, described audio frequency input module comprises RTSP Stream Client interface module, Http Stream Client interface module, sound card interface module, file input interface module, input abstraction interface module, Transcoding module and Resamples module;

Described input abstraction interface module one end connects RTSP Stream Client interface module, Http Stream Client interface module, sound card interface module and file input interface module, the other end is connected with Transcoding module, for dissimilar audio resource being carried out to standardization processing unified audio stream format;

Described Transcoding module one end connects input abstraction interface module, and the other end connects Resamples module, by carried out the transcoding of audio frequency Codec by normalized audio stream, converts audio stream to unified compressed format; Described Resamples module connects Transcoding module and Audio conversion unit, and the audio stream after unified compressed format is carried out to sample rate unification.

3. the Streaming Media switching matrix for Web broadcast according to claim 1, is characterized in that, described Audio conversion unit comprises cross matrix and EPG control unit;

4. according to the Streaming Media switching matrix for Web broadcast described in claim 1 or 3, it is characterized in that, described cross bar switch is the derailing switch for controlling corresponding inlet flow and output stream break-make.

5. the Streaming Media switching matrix for Web broadcast according to claim 1, it is characterized in that, described audio output unit comprises unified output interface module, RTSP server module, HTTP streaming media server module, sound card output module and file output module.

6. for a Streaming Media switching matrix broadcast control method for Web broadcast, it is characterized in that, comprise the following steps:

7. the Streaming Media switching matrix broadcast control method for Web broadcast according to claim 6, is characterized in that, it is singly to set corresponding cross bar switch unlatching or the process of shut-in time according to the requirement of output stream that described EPG compiles.

8. the Streaming Media switching matrix broadcast control method for Web broadcast according to claim 6, is characterized in that, described input source comprises sound card input source, RTSP input source, HTTP input source and file input source.

9. the Streaming Media switching matrix broadcast control method for Web broadcast according to claim 8, it is characterized in that, described RTSP input source and described HTTP input source, the method that adopts anticipation to look ahead: in the time that next demand is switched RTSP stream or the input of HTTP stream, a period of time connects in advance, carries out quick seamless handoff in the time that arrive in switching time.

10. Streaming Media switching matrix and broadcast control method thereof for Web broadcast according to claim 8, is characterized in that, described file input source adopts the mechanism of hardware timing.