CN102752400B - Audio file multiple velocity safe transmission method and system between net - Google Patents
Audio file multiple velocity safe transmission method and system between net Download PDFInfo
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- CN102752400B CN102752400B CN201210249838.5A CN201210249838A CN102752400B CN 102752400 B CN102752400 B CN 102752400B CN 201210249838 A CN201210249838 A CN 201210249838A CN 102752400 B CN102752400 B CN 102752400B
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Abstract
The invention discloses audio file multiple velocity safe transmission method and system between a kind of net, belong to technical field of digital broadcast.The method includes: the first audio file is converted into the first preset format by outer net equipment；Described outer net equipment will convert into the first audio file of the first preset format and carries out cutting, obtains several audio file fragment；Described several audio file fragments are transferred to Intranet equipment by tone frequency channel wire by described outer net equipment the most simultaneously；Described several audio file fragments are merged by described Intranet equipment, obtain the second audio file；Described second audio file is converted into the second preset format.Invention achieves the safe and efficient audio file transmissions purpose connected without network.
Description
Technical field
The present invention relates to technical field of digital broadcast, more particularly, it relates to audio file multiple velocity safety between a kind of net
Transmission method and system.
Background technology
Inside broadcasting station system, it is required for audio file transmissions such as substantial amounts of interview material and partial programmes every day
In Play System, in case using when playing program.At present, the transmission means that most of broadcasting stations are taked is by be transmitted
Audio file be recorded in Play System in the mode of record of the 1:1 time of sound console input and output.This transmission means needs
Taking a long time, not only occupy the substantial amounts of machine room time, also take up substantial amounts of edit session, efficiency is the lowest
Under.
Summary of the invention
The goal of the invention of the present invention is the defect for prior art, proposes audio file multiple velocity between one net and passes safely
Transmission method and system, in order to save the transmission time, improve program production efficiency.
According to an aspect of the present invention, the invention provides audio file multiple velocity safe transmission method between a kind of net,
Including:
First audio file is converted into the first preset format by outer net equipment；
Described outer net equipment will convert into the first audio file of the first preset format and carries out cutting, obtains several audio frequency literary composition
Pieces section；
Described several audio file fragments are transferred to Intranet equipment by tone frequency channel wire by described outer net equipment the most simultaneously；
Described several audio file fragments are merged by described Intranet equipment, obtain the second audio file；
Described second audio file is converted into the second preset format.
According to a further aspect in the invention, the invention provides audio file multiple velocity secure transmission system between a kind of net,
Including: outer net equipment and Intranet equipment, described outer net equipment is connected with described Intranet equipment by tone frequency channel wire；
Described outer net equipment includes:
First modular converter, for being converted into the first preset format by the first audio file；
File cutting module, carrying out cutting for will convert into the first audio file of the first preset format, obtaining several
Audio file fragment；
Sending module, for being sent simultaneously to described interior respectively by described tone frequency channel wire by described several audio file fragments
Net equipment；
Described Intranet equipment includes:
Receiver module, for receiving the institute that the sending module of described outer net equipment sends the most simultaneously by described tone frequency channel wire
State several audio file fragment；
File combination module, for described several audio file fragments being merged, obtains the second audio file；
Second modular converter, for being converted into the second preset format by described second audio file.
Between the net that the present invention provides, audio file multiple velocity safe transmission method and system are by by audio file cutting being
These several fragments are transmitted by several fragments simultaneously, and transmission speed is many times of prior art, saves the transmission time, carries
High program production efficiency.And, the method and device provided according to the present invention, audio file is from outer net device transmission to Intranet
Equipment, wherein Intranet equipment is not connected with the Internet, it is to avoid the audio file used for Play System by the Internet in sick
The invasion of poison, plays the effect of safer protection audio file.In a word, invention achieves safe and efficient without network
The audio file transmissions purpose connected.
Accompanying drawing explanation
The flow chart of the embodiment one of audio file multiple velocity safe transmission method between the net that Fig. 1 provides for the present invention；
The flow chart of the embodiment two of audio file multiple velocity safe transmission method between the net that Fig. 2 provides for the present invention；
The structural representation of one embodiment of audio file multiple velocity secure transmission system between the net that Fig. 3 provides for the present invention
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawings and technical solution of the present invention is described in detail by preferred implementation.
The flow chart of the embodiment one of audio file multiple velocity safe transmission method between the net that Fig. 1 provides for the present invention.As
Shown in Fig. 1, the method comprises the following steps:
First audio file is converted into the first preset format by step 101, outer net equipment.
Outer net equipment refers at the internal equipment being connected with the Internet of broadcasting station system herein.In broadcasting station it is
In system, outer net equipment arranges special file to deposit the first audio file waiting for transmission, including interview material, news program
With other programs various, owing to outer net equipment is connected with the Internet, thus broadcasting station internal staff can by interconnection
First audio file is uploaded to this special file by net.Outer net device real-time monitoring this document presss from both sides, and once has and newly deposits
First first audio file, can convert thereof into the first preset format.
Step 102, outer net equipment will convert into the first audio file of the first preset format and carries out cutting, obtains several sound
Frequency file fragment.
After being changed by the form of the first audio file, the first audio file is cut into several fragment, cutting
Quantity is that the way can simultaneously transmitted by current system determines.If the number of the input/output passage of current system
For N, then show that the way that current system can transmit simultaneously is N, then the first audio file cutting can be just N by this step
Individual fragment.
Several audio file fragments are transferred to Intranet equipment by tone frequency channel wire by step 103, outer net equipment the most simultaneously.
Intranet equipment refers to the equipment not being connected inside broadcasting station system with the Internet herein, and Intranet equipment is with outer
Being connected by MCVF multichannel voice frequency line between net equipment, every road tone frequency channel wire carrys out transfer audio files sheet as a road input/output passage
Section.Several audio file fragments are respectively fed to the input/output passage of correspondence by outer net equipment, at each input/output passage
Inside complete the transmission of homologous segment, and be transmitted in several input/output passages simultaneously.If several audio frequency
The duration of file fragment is substantially the same, then transmission speed can reach N times of prior art.
Several audio file fragments are merged by step 104, Intranet equipment, obtain the second audio file.
Several audio file fragments are merged into a new file, the i.e. second audio file by Intranet equipment in order.
Second audio file is converted into the second preset format by step 105, Intranet equipment.
The form of the second audio file is above-mentioned first preset format, and this step needs the audio frequency literary composition of the first preset format
Part is converted into the audio file of the second preset format required for Play System, in case using when playing program.
Between the net that the present embodiment provides, audio file multiple velocity safe transmission method is by being several by audio file cutting
These several fragments are transmitted by fragment simultaneously, and transmission speed is many times of prior art, saves the transmission time, improves
Program production efficiency.And, according to the present embodiment provide method, audio file from outer net device transmission to Intranet equipment, its
Middle Intranet equipment is not connected with the Internet, it is to avoid the audio file used for Play System is entered by virus in the Internet
Invade, play the effect of safer protection audio file.In a word, the present embodiment has reached safe and efficient without network connection
Audio file transmissions purpose.
The flow chart of the embodiment two of audio file multiple velocity safe transmission method between the net that Fig. 2 provides for the present invention.This
Embodiment is a preferred embodiment of the present invention, and wherein the first preset format is WAV form, and the second preset format is S48 lattice
Formula.As in figure 2 it is shown, the method comprises the following steps:
First audio file is converted into WAV form by step 201, outer net equipment.
WAV form is a kind of standard for digital audio storage developed jointly by Microsoft and IBM, and it is mutual that it meets resource
Change file format (Resource Interchange File Format, hereinafter referred to as: RIFF) specification.At broadcasting station system
In, outer net equipment arranges special file to deposit the first audio file waiting for transmission, including interview material, news program and
Other programs various, owing to outer net equipment is connected with the Internet, so broadcasting station internal staff can pass through the Internet
First audio file is uploaded to this special file.Outer net device real-time monitoring this document presss from both sides, and once has the newly deposited
First one audio file, can be converted into WAV unpacked format.The source filename assuming the first audio file waiting for transmission is
" A.S48 ", its form is S48(stereo, 48kHz) form, S48 uses Mp1(MPEG-1 layer 1), Mp2(MPEG-1
Layer 2) sound compression form, owing to it is prone to editor and shears, so applying wider in broadcasting station system.Outer net sets
This source file can be converted to " A.WAV " formatted file by standby decoder plug-in unit.
Step 202, outer net equipment are converted into the first audio file of WAV form and carry out cutting, obtain several audio frequency literary composition
Pieces section.
The way can simultaneously transmitted according to current system, is corresponding fragment by the first audio file cutting.If worked as
Front system has N number of input/output passage, then can be N number of audio file fragment by file " A.WAV " cutting, order respectively
Entitled " A_N.Start.WAV ", " A_N.1.WAV ", " A_N.2.WAV ", " A_N.3.WAV " ..., " A_N. (N-1) .WAV ".
Wherein fragment headed by " A_N.Start.WAV ".As a example by N is 4, current system has 4 input/output passages, by file
" A.WAV " cutting is 4 audio file fragments, be respectively " A_4.Start.WAV ", " A_4.1.WAV ", " A_4.2.WAV " and
" A_4.3.WAV ", the duration of these 4 fragments is substantially the same.
After cutting completes, a file " A.Context " can be concurrently formed, deposit in this document above-mentioned cutting it
After the filename of all fragments, in case subsequent process utilizing this document search corresponding fragment.
Preferably, after obtaining several audio file fragment, it is also possible to reduce audio file fragment level 0.5db, this
On the basis of sample can not decline ensureing audio quality, the variable code rate of follow-up WAV clip file is made to reach more than 99.7%, also
That is, more than the 99.7% of the data of follow-up WAV clip file there occurs change, because if simply reducing level, and audio frequency number
According to being only reduction of volume, virus data then can be the most damaged, thus blocks non-viral delivery subsidiary in file to Intranet.
Step 203, outer net equipment insert scrambler every several bytes respectively in several audio file fragments.
In the WAV clip file that cutting obtains, insert a scrambler every several bytes, subsidiary in order to blocking virus
The Intranet of the broadcasting station system of transmission in file.Scrambler type and the interval inserted can be by user's self-definings.
Several audio file fragments are transferred to Intranet equipment by tone frequency channel wire by step 204, outer net equipment the most simultaneously.
Playing program index " .Context " file in system intranet and extranet equipment, obtains the filename wherein deposited,
MCVF multichannel voice frequency line transmits corresponding audio file fragment simultaneously；In system, the program of including of Intranet equipment is recorded from each road audio frequency
The audio file fragment that line is included.For the audio file fragment that sample frequency is 48KHz, WAV form, with Audio Engineering Society
(Audio Engineering Society is called for short: AES) 3 speed supported are transmitted.The sound that the present embodiment is used
The transfer rate of frequency file fragment can be consistent with the transfer rate of the first original audio file, it is also possible to inconsistent
, as long as the speed that AES3 is supported.For example, the transfer rate of the first audio file is 48KHz, and audio frequency is civilian
The transfer rate of pieces section can be 48KHz, it is also possible to for 96KHz, it is also possible to for 192KHz, the most more can improve transmission
Speed.
Preferably, in a certain output channel while transfer audio files fragment, can be by the literary composition of audio file fragment
Part name is transferred to Intranet equipment together；Further, it is also possible to by the sample rate of audio file fragment and/or fragment length also
Rise and be transferred to Intranet equipment.
Owing to the filename of audio file fragment is a character string, Chinese character is generally also had to exist, it and non-audio data,
Therefore filename can not be transmitted by direct tone frequency channel wire.The method that the present embodiment is taked is to be entered by the filename of audio file fragment
Row coding, as carried out Unicode coding, is converted to Unicode encoded radio by non-Unicode character, obtains Unicode encoded radio
It can be binary data；Then binary data is mapped as pulse code modulation (Pulse Code Modulation,
PCM) audio sample values, these audio sample values can transmit on tone frequency channel wire.
According to audio transmission criteria, on tone frequency channel wire the span of the audio sample values of transmission [-32768,32767] it
Between.The present embodiment pre-builds the mapping relations of binary data " 0 " and " 1 " and audio sample values, for example, this mapping is closed
System is mapped as audio sample values 0 for binary data " 0 ", and binary data " 1 " is mapped as audio sample values 32500.So sound
The filename of frequency file fragment is ultimately converted to audio sample values.
For sample rate and/or fragment length, it is also possible to take said method to be converted into audio sample values and be transmitted.With
Unlike filename, sample rate and/or fragment length are numerals, can directly be converted into binary data；Then will
Binary data is mapped as the audio sample values of PCM, and these audio sample values can also transmit on tone frequency channel wire.
Except can be with the filename of transfer audio files fragment, sample rate and fragment length, it is also possible to transmission starts recording
Other control words such as synchronization character, filename end mark, end mark.Specifically, the content of transmission information can be found in table 1.
Table 1
| Content | Implication |
| 32 audio sample values of 0xFFFFFFFF | Start synchronization character of recording |
| 16 audio sample values of 0xXXXX | Fragment length high 16 |
| 16 audio sample values of 0xXXXX | Fragment length low 16 |
| 16 audio sample values of 0xXXXX | Sample rate |
| 16 audio sample values of 0xXXXX | Filename |
| 16 audio sample values of 0x0000 | Filename end mark |
| ...... | Audio content |
| 16 audio sample values of 0xAAAA | End mark |
The content of transmission information should be binary data, but for convenience, binary data is all converted into 16 and enters
Data processed are described.
As it can be seen from table 1 the transmitting procedure of audio file includes:
(1) transmission starts the synchronization character 0xFFFFFFFF that records；
It is 32 that 0xFFFFFFFF is converted into binary data, and each binary data is mapped as 1 audio sample values,
Therefore the synchronization character that starts to record comprises 32 audio sample values.
The present embodiment has pre-build and has started the synchronization character 0xFFFFFFFF the first mapping relations with audio sample values of recording,
It is specially 0xFFFFFFFF and is mapped as following 32 audio sample values:
0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000
0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000
0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000
0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000|0x7FFF|0x8000
Each audio sample values also represents with 16 binary data.Wherein 0x7FFF is converted into decimal data and is
32767,0x8000 to be converted into decimal data be-32768.It follows that this starts to record, synchronization character transmits on tone frequency channel wire
Time be for the peak of 32767(audio sample values within a cycle), be exactly-32768(audio frequency in the back to back next cycle
The minimum of sample value) " sudden change " signal.And common audio signal does not haves this " sudden change " signal, so start record
Sound synchronization character can make a distinction with audio content, it is simple to receiving terminal identification.
(2) transfer audio files fragment length；
Audio file fragment length is converted to 32 bit binary data, and its high 16 are mapped as 16 audio sample values,
Low 16 are mapped as 16 audio sample values.
(3) transmission sample rate；
It is 16 bit binary data by sample rate conversion, is then mapped as 16 audio sample values.
(4) transmission filename；
File name is the filename of audio file fragment.Filename is carried out coding and obtains 16 bit binary data, so
After be mapped as 16 audio sample values.
(5) transmission filename end mark 0x0000；
Filename end mark represents the filename end of transmission.It is 16 that 0x0000 is converted into binary data, is mapped as 16
Individual audio sample values.
The present embodiment has pre-build second mapping relations of filename end mark 0x0000 and audio sample values, is specially
0x0000 is mapped as following 16 audio sample values:
0x1000|0xF000|0x1000|0xF000|0x1000|0xF000|0x1000|0xF000
0x1000|0xF000|0x1000|0xF000|0x1000|0xF000|0x1000|0xF000
Each audio sample values also represents with 16 binary data.Wherein 0x1000 is converted into decimal data and is
4096,0xF000 to be converted into decimal data be-4096.Intranet equipment receives such audio signal and just can recognize that file
The name end of transmission.
(6) transmission audio content；
Audio content is audio file fragment, inherently voice data, can directly transmit.
(7) end of transmission labelling 0xAAAA.
It is 16 that 0xAAAA is converted into binary data, is mapped as 16 audio sample values.
In above-mentioned transmitting procedure, start to record synchronization character, filename end mark and end mark are permissible as control word
Using special mapping relations, such as, the synchronization character that starts to record uses the first mapping relations to map, and filename end mark is adopted
Mapping by the second mapping relations, end mark can also use another kind of mapping relations to map, and is not the most given
Specific example.After Intranet equipment receives transmission information, can recognize that these control words according to identical mapping relations.
Audio file fragment length, sample rate and filename can use, as transmission data, the 3rd pre-build as follows
Mapping relations map, particularly as follows: it is 0x0000 that binary data " 0 " is mapped as audio sample values 0(16 binary data), two
It is 0x7EF4 that binary data " 1 " is mapped as audio sample values 32500(16 binary data).3rd mapping relations are only a tool
The example of body, binary data " 0 " and " 1 " can be mapped as any two numerical value of audio sample values (-32768～32767
Between).After Intranet equipment receives transmission information, process according to identical mapping relations, obtain audio file sheet
The binary data of segment length, sample rate and filename, by direct for the binary data of audio file fragment length and sample rate
Convert and i.e. can get audio file fragment length and sample rate, the binary data of filename is decoded, as carried out
Unicode decodes, and i.e. can get filename.
Further, owing to being likely to occur the problems such as distortion in transmitting procedure, the data causing outer net equipment to send arrive
There will be deviation after reaching Intranet equipment, for this situation, mapping relations can be adjusted by Intranet equipment, in order to is just obtaining
True result.As a example by above-mentioned 3rd mapping relations, Intranet equipment can by [32000,32767] and [-32768 ,-
32000] audio sample values between scope is mapped as binary data " 1 ", by the audio frequency between [-4096,4096] scope
Sample value is mapped as binary data " 0 ".
Above-mentioned transmission information is all to be played on the recording sound card of Intranet equipment by the sound card of outer net equipment.Each recording
, as long as there is the control word of regulation, just according to control word in the voice data that sound card receives as an input channel step-by-step detection
Process follow-up data, and corresponding audio file fragment is stored in corresponding catalogue.
Several audio file fragments are merged by step 205, Intranet equipment, obtain the second audio file.
Upon completion of the transmission, by N number of file " A_N.Start.WAV ", " A_N.1.WAV ", " A_N.2.WAV ", " A_
N.3.WAV " ..., " A_N. (N-1) .WAV " be merged into a new wav file, named " A.WAV ", this article in order
Part is exactly the second audio file that transmission obtains.
Second audio file is converted into S48 form by step 206, Intranet equipment.
The form of the second audio file is WAV form, in addition it is also necessary to WAV form is converted to unified reference format, such as
S48 form, obtains audio file " A.S48 ".
Between the net that the present embodiment provides, audio file multiple velocity safe transmission method is by being N number of by audio file cutting
Section, is transmitted this N number of fragment simultaneously, and transmission speed is N times of prior art, saves the transmission time, improves program
Make efficiency.Further, the transfer rate of audio file fragment can be higher than the transfer rate of original audio file, thus
Further increase transmission speed.It addition, the method provided according to the present embodiment, audio file is from outer net device transmission to Intranet
Equipment, wherein Intranet equipment is not connected with the Internet, it is to avoid the audio file used for Play System by the Internet in sick
The invasion of poison, plays the effect of safer protection audio file.In a word, the present embodiment has reached safe and efficient without net
The audio file transmissions purpose that network connects.
The structural representation of one embodiment of audio file multiple velocity secure transmission system between the net that Fig. 3 provides for the present invention
Figure.As it is shown on figure 3, this system includes: outer net equipment 10 and Intranet equipment 20, described outer net equipment 10 is by tone frequency channel wire 30 and institute
State Intranet equipment 20 to connect.
Outer net equipment 10 includes: the first modular converter 11, file cutting module 12 and sending module 13.Wherein: first turn
Die change block 11 is for being converted into the first preset format by the first audio file；It is pre-that file cutting module 12 is used for will convert into first
If the first audio file of form carries out cutting, obtain several audio file fragment；Sending module 13 is for by described audio frequency
Described several audio file fragments are sent simultaneously to described Intranet equipment by line 30 respectively.
Intranet equipment 20 includes: receiver module 21, file combination module 22 and the second modular converter 23.Wherein: receive mould
Described several sounds that block 21 is sent for the sending module 13 being received described outer net equipment by described tone frequency channel wire 30 the most simultaneously
Frequency file fragment；File combination module 22, for described several audio file fragments being merged, obtains the second audio file；
Second modular converter 23 is for being converted into the second preset format by described second audio file.
Preferably, described outer net equipment 10 can also include: scrambling module 14, for respectively at described several audio files
Fragment inserts scrambler every several bytes.
Preferably, above-mentioned sending module 13 can pass through specifically for the speed supported with Audio Engineering Society AES3
Several audio file fragments are sent simultaneously to Intranet equipment 20 by tone frequency channel wire 30 respectively.
Above-mentioned outer net equipment 10 can also include: coding module and mapping block.Coding module is for by several audio frequency literary composition
The filename of pieces section encodes respectively, obtains the encoded radio of the filename of each audio file fragment；Mapping block is used for
The encoded radio of the filename of each audio file fragment and sample rate and/or fragment length are each mapped to audio sample
Value；Described sending module 13 specifically for by tone frequency channel wire 30 by corresponding to several audio file fragments and respective filename
The audio sample values that audio sample values, sample rate and/or fragment length are corresponding is sent simultaneously to Intranet equipment 20 respectively.Corresponding
, above-mentioned Intranet equipment 20 may include that mapping block and decoder module.Mapping block is for being mapped as audio sample values respectively
The encoded radio of the filename of individual audio file fragment and sample rate and/or fragment length；Decoder module is for by each audio frequency
The encoded radio of the filename of file fragment is decoded, and obtains the filename of each audio file fragment.
Between the net that the present embodiment provides, audio file multiple velocity secure transmission system is by being several by audio file cutting
These several fragments are transmitted by fragment simultaneously, and transmission speed is many times of prior art, saves the transmission time, improves
Program production efficiency.And, according to the present embodiment provide system, audio file from outer net device transmission to Intranet equipment, its
Middle Intranet equipment is not connected with the Internet, it is to avoid the audio file used for Play System is entered by virus in the Internet
Invade, play the effect of safer protection audio file.In a word, the present embodiment has reached safe and efficient without network connection
Audio file transmissions purpose.
Finally it should be noted that: listed above is only the example that is embodied as of the present invention, the technology of certain this area
The present invention can be modified and modification by personnel, if these amendments and modification belong to the claims in the present invention and equivalent skill thereof
Within the scope of art, all it is considered as protection scope of the present invention.
Claims (10)
1. audio file multiple velocity safe transmission method between a net, it is characterised in that including:
First audio file is converted into the first preset format by outer net equipment；Wherein, described outer net equipment is to be in broadcasting station
The internal equipment being connected with the Internet of system；
Described outer net equipment will convert into the first audio file of the first preset format and carries out cutting, obtains several audio file sheet
Section；
Described outer net equipment by tone frequency channel wire by audio sample values corresponding to several audio file fragments and respective filename,
Sample rate and/or audio sample values corresponding to fragment length are transferred to Intranet equipment the most simultaneously；Wherein, described Intranet equipment is
The equipment not being connected with the Internet inside broadcasting station system, by multichannel sound between described Intranet equipment and described outer net equipment
Frequently line connects；
Described several audio file fragments are merged by described Intranet equipment, obtain the second audio file；
Described second audio file is converted into the second preset format.
Method the most according to claim 1, it is characterised in that at described outer net equipment by tone frequency channel wire by described several sounds
Frequency file fragment also includes before being transferred to Intranet equipment the most simultaneously: described outer net equipment is respectively at described several audio files
Fragment inserts scrambler every several bytes.
Method the most according to claim 1, it is characterised in that described outer net equipment passes through tone frequency channel wire by described several audio frequency
File fragment is transferred to Intranet equipment the most simultaneously particularly as follows: the speed supported with AES3, and described outer net equipment passes through audio frequency
Described several audio file fragments are transferred to Intranet equipment by line the most simultaneously.
Method the most according to claim 1, it is characterised in that at described outer net equipment by tone frequency channel wire by described several sounds
Frequency file fragment also includes before being transferred to Intranet equipment the most simultaneously:
The filename of several audio file fragments is encoded respectively, obtains the coding of the filename of each audio file fragment
Value；
The encoded radio of the filename of each audio file fragment is each mapped to audio sample values.
Method the most according to claim 4, it is characterised in that at described outer net equipment by tone frequency channel wire by described several sounds
Frequency file fragment also includes before being transferred to Intranet equipment the most simultaneously:
Sample rate and/or the fragment length of each audio file fragment are each mapped to audio sample values.
Method the most according to claim 1, it is characterised in that described first preset format is WAV form, described second pre-
If form is S48 form.
7. audio file multiple velocity secure transmission system between a net, it is characterised in that including: outer net equipment and Intranet equipment,
Described outer net equipment is connected with described Intranet equipment by MCVF multichannel voice frequency line；Described outer net equipment is inside broadcasting station system
The equipment being connected with the Internet, described Intranet equipment is the equipment not being connected with the Internet inside broadcasting station system；
Described outer net equipment includes:
First modular converter, for being converted into the first preset format by the first audio file；
File cutting module, carrying out cutting for will convert into the first audio file of the first preset format, obtaining several audio frequency
File fragment；
Sending module, is used for audio sample corresponding to several audio file fragments and respective filename by tone frequency channel wire
The audio sample values that value, sample rate and/or fragment length are corresponding is sent simultaneously to Intranet equipment respectively；
Described Intranet equipment includes:
Receiver module, for receiving the described number that the sending module of described outer net equipment sends the most simultaneously by described tone frequency channel wire
Individual audio file fragment；
File combination module, for described several audio file fragments being merged, obtains the second audio file；
Second modular converter, for being converted into the second preset format by described second audio file.
System the most according to claim 7, it is characterised in that described outer net equipment also includes: scrambling module, for respectively
Scrambler is inserted every several bytes in described several audio file fragments.
System the most according to claim 7, it is characterised in that described sending module is specifically for the speed supported with AES3
Described several audio file fragments are sent simultaneously to described Intranet equipment by described tone frequency channel wire by rate respectively.
System the most according to claim 7, it is characterised in that described outer net equipment also includes:
Coding module, for being encoded respectively by the filename of several audio file fragments, obtains each audio file fragment
The encoded radio of filename；
Mapping block, for dividing the encoded radio of the filename of each audio file fragment and sample rate and/or fragment length
It is not mapped as audio sample values.
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| CN201210249838.5A CN102752400B (en) | 2012-07-18 | 2012-07-18 | Audio file multiple velocity safe transmission method and system between net |
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| CN107609398B (en) * | 2017-08-15 | 2019-10-29 | 北京英夫美迪科技股份有限公司 | To breaking method and equipment viral in the audio file of linear PCM coding |
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