CN111565257A - Transcoding method, device, system and medium of fax terminal - Google Patents
Transcoding method, device, system and medium of fax terminal Download PDFInfo
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- CN111565257A CN111565257A CN202010292599.6A CN202010292599A CN111565257A CN 111565257 A CN111565257 A CN 111565257A CN 202010292599 A CN202010292599 A CN 202010292599A CN 111565257 A CN111565257 A CN 111565257A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/333—Mode signalling or mode changing; Handshaking therefor
- H04N1/33346—Mode signalling or mode changing; Handshaking therefor adapting to a particular standardised protocol
Abstract
The invention discloses a transcoding method, equipment, a system and a medium of a fax terminal, wherein the transcoding method comprises the following steps: the first fax terminal acquires data, encodes the data to obtain first encoded data, and then sends the first encoded data to the media gateway controller; after receiving the first coded data transmitted by the first fax terminal, the media gateway controller performs decoding processing to obtain first decoded data, and stores the first decoded data in a first preset memory; the media gateway controller extracts the first decoding data in the first preset memory, performs coding processing to obtain second coding data, and stores the second coding data in a second preset memory; wherein the second encoded data is encoded in a different manner than the first encoded data; and the media gateway controller transmits the second coded data to a second fax terminal. Only occupying the memory of the media gateway controller can be completed.
Description
Technical Field
The invention relates to the technical field of faxes, in particular to a transcoding method, equipment, a system and a medium of a fax terminal.
Background
At present, in daily life, facsimile machines are communication devices that use scanning and photoelectric conversion techniques to convert still images such as documents, charts, photographs, etc. into electrical signals, which are transmitted to a receiving end for copying in a recorded form. In most fax application scenarios, terminals of a sender and a receiver of a fax use the same coding mode, for example, both use a t.30 fax protocol or a t.38 fax protocol, and if the fax needs to pass through a media gateway controller, the media gateway controller also only performs packet forwarding and transparent transmission, thereby reducing the coding and decoding processes and ensuring the success rate of the fax.
However, as the demand of users for faxes is higher and higher, the method is often used in special situations, such as some network access tests, where the transcoding of the t.30 fax protocol and the t.38 fax protocol is required to be verified; or under the condition that one end of the fax terminal only supports the t.30 fax protocol and the other end only supports the t.38 fax protocol, because the encoding modes of the t.30 fax protocol and the t.38 fax protocol are different, the data signal cannot be completely restored during decoding, a common transcoding method is to directly encode the decoded data, and this mode makes the detection function of the signal tone based on a Time-division multiplexing (TDM) interface unusable, but transcoding between the fax terminal supporting the t.30 fax protocol and the fax terminal supporting the t.38 fax protocol needs to detect the signal tone to complete transcoding, so the common transcoding method cannot be directly used in transcoding under this condition. Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a transcoding method, device, system and medium for a fax terminal, which aim to solve the problem of unsuccessful faxes between fax terminals of different encoding methods.
The technical scheme of the invention is as follows:
a transcoding method of a fax terminal comprises the following steps:
the first fax terminal acquires data, encodes the data to obtain first encoded data, and then sends the first encoded data to the media gateway controller;
after receiving the first coded data transmitted by the first fax terminal, the media gateway controller performs decoding processing to obtain first decoded data, and stores the first decoded data in a first preset memory, wherein the first decoded data is circularly stored in the first preset memory;
the media gateway controller extracts the first decoding data in the first preset memory, performs coding processing to obtain second coding data, and stores the second coding data in a second preset memory, wherein the second coding data are circularly stored in the second preset memory; wherein the second encoded data is encoded in a different manner than the first encoded data;
and the media gateway controller transmits the second coded data to a second fax terminal.
The transcoding method of the fax terminal, wherein the extracting, by the media gateway controller, the first decoded data in the first preset memory includes:
and after detecting the fax signal tone in the first preset memory, the media gateway controller extracts the first decoding data in the first preset memory.
The transcoding method of the fax terminal comprises the following steps that a plurality of first decoding data are sequentially arranged in a first preset memory; and the second coded data are sequentially arranged in the second preset memory.
The transcoding method of the fax terminal, wherein the first fax terminal comprises: a first foreign exchange station, a first time division multiplexing interface and a first digital signal processor; the first fax terminal acquires data and performs coding processing on the data to obtain first coded data, and the method comprises the following steps:
the first external exchange station acquires data sent by a first fax machine, and sends the data to the first digital signal processor through a first time division multiplexing interface for coding to obtain first coded data.
The transcoding method of the fax terminal, wherein the second fax terminal comprises a second digital signal processor; the media gateway controller transmitting the second encoded data to a second fax terminal, comprising the steps of:
and the media gateway controller takes out the second coded data from the second preset memory and sends the second coded data to the second digital signal processor.
The transcoding method of the fax terminal, wherein the second fax terminal includes a second time division multiplexing interface and a second external exchange station, and after the media gateway controller sends the second encoded data to the second fax terminal, the method further includes the steps of:
and the second digital signal processor decodes the second coded data, transmits the second coded data to the second external exchange station through the second time division multiplexing interface, and then transmits the data to the second fax machine.
A transcoding apparatus of a fax terminal, comprising: a processor, and a memory coupled to the processor;
the storage stores a transcoding method program of the fax terminal, and when the transcoding method program of the fax terminal is executed by the processor, the following steps are realized:
the first fax terminal acquires data, encodes the data to obtain first encoded data, and then sends the first encoded data to the processor;
the processor receives the first coded data transmitted by the first fax terminal, decodes the first coded data to obtain first decoded data, and stores the first decoded data in the storage;
the processor extracts the first decoding data in the storage, performs coding processing to obtain second coding data, and stores the second coding data in the storage; wherein the second encoded data is encoded in a different manner than the first encoded data;
and the processor transmits the second coded data to a second fax terminal.
When the storage stores a transcoding method program of the fax terminal, the storage uses a circulating memory; the first decoded data and the second encoded data are sequentially arranged in the circular memory.
A transcoding system of a fax terminal, comprising:
a receiving module, configured to receive first encoded data;
a decoding module for decoding the first encoded data into first decoded data;
an encoding module for encoding the first decoded data into second encoded data;
the storage module is used for storing the first decoding data and the second encoding data;
and the sending module is used for sending the second coded data.
A storage medium, wherein the storage medium stores one or more programs, and the one or more programs are executable by one or more processors to implement the steps in the transcoding method of the fax terminal as described in any one of the above.
Compared with the prior art, the embodiment of the invention has the following advantages:
according to the method provided by the embodiment of the invention, when two fax terminals transmit signals by using different coding modes, the first fax terminal acquires data, codes the data into first coded data and then sends the first coded data to the media gateway controller, decodes the first coded data into first decoded data in the media gateway controller and stores the first decoded data in a first preset memory; and then when the first coded data is sent to a second fax terminal, the first decoded data is taken out from the first preset memory, the first decoded data is coded into second coded data, and the coded second coded data is sent to the second fax terminal by using a coding mode different from that of the first coded data. When the coding modes supported by the two fax terminals are different, transcoding can be performed only by occupying a preset memory with a specified size of the media gateway controller, the respective coding modes of the first fax terminal and the second fax terminal are reserved, the success rate of faxing is improved, and efficient faxing is completed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an ideal fax model of the prior art;
FIG. 2 is a functional schematic diagram of a prior art fax terminal;
FIG. 3 is a flow chart of a fax model of the prior art;
FIG. 4 is a flowchart illustrating a transcoding method of a fax terminal according to a preferred embodiment of the present invention;
fig. 5 is a functional schematic diagram of a first preset memory and a second preset memory of a transcoding method of a fax terminal according to the present invention;
fig. 6 is a functional schematic diagram of a transcoding device of a fax terminal according to the present invention;
fig. 7 is a functional block diagram of a transcoding system of a fax terminal according to the present invention.
Detailed Description
The invention provides a transcoding method, equipment, a system and a medium of a fax terminal, and the invention is further explained in detail below in order to make the purpose, the technical scheme and the effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In most fax application scenarios in the prior art, terminals of a sending party and a receiving party of a fax use the same encoding mode, as shown in fig. 1, a Media Gateway Controller (MGC) controls a fax terminal 1 and a fax terminal 2 to establish a media link, and the fax terminal 1 and the fax terminal 2 both use a t.38 fax protocol or a g.711a encoded media stream. This approach has no unnecessary transcoding and fax success is the most guaranteed usage model.
Specifically, as shown in fig. 2, in the prior art, an external exchange Station (FXS interface) of a fax terminal receives a telephone line and connects the telephone line to a fax machine, a Signal of the fax machine is acquired as data 1 by a Digital Signal processor (DSP chip) through a time division multiplexing interface, the Digital Signal processor encodes the data 1 to form data 2, and the data 2 is sent to an opposite end through a network. The fax terminal receives the data packet from the opposite terminal as data 3, decodes the data 3 into data 4, and sends the data 4 to the FXS interface through the TDM interface to be transmitted to the fax machine. The fax terminals all use the T.30 fax protocol or the T.38 fax protocol, if the fax needs to pass through the media gateway, the media gateway only transmits the packet, so that the encoding and decoding process is reduced, and the success rate of the fax is ensured.
However, in some special scenarios, as shown in fig. 3, for example, in the case that one end only supports the t.30 fax protocol and the other end only supports the t.38 fax protocol, the media gateway is required to perform transcoding operation, or verify the transcoding situations of the t.30 fax protocol and the t.38 fax protocol due to some network access test requirements. Because the original data of the fax is Pulse Code Modulation (PCM) data of a rate/U rate input from the time division multiplexing interface, but because the data packet of the t.30 fax protocol and the data packet of the t.38 fax protocol cannot be transcoded one to one, fax failure is easily caused in the transcoding process.
Referring to fig. 4 and 5, a flowchart of a transcoding method of a fax terminal according to a preferred embodiment of the present invention is shown, which includes the steps of:
s100, the first fax terminal acquires data, encodes the data to obtain first encoded data, and then sends the first encoded data to the media gateway controller.
Specifically, the first fax terminal includes: a first foreign exchange station, a first time division multiplexing interface and a first digital signal processor; the step S100 specifically includes: the first external exchange station acquires data sent by a first fax machine, and sends the data to the first digital signal processor through a first time division multiplexing interface for coding to obtain first coded data.
S200, after receiving the first encoded data transmitted by the first fax terminal, the media gateway controller performs decoding processing to obtain first decoded data, and stores the first decoded data in a first preset memory 11, where the first decoded data is stored in the first preset memory 11 in a circulating manner. When continuous faxes are carried out among fax terminals, the first preset memory 11 is gradually filled along with the carrying out of multiple faxes, and because single faxes have design time, after the single faxes are finished, data stored in the first preset memory 11 lose effect and occupy the storage space of the first preset memory 11; the first preset memory 11 adopts a circulating memory with limited capacity, data is sequentially stored in the first preset memory 11 according to the forming sequence along with the progress of a plurality of faxes, and after the storage of the first preset memory 11 is saturated, the formed data sequentially covers the data previously stored in the first preset memory 11 according to the forming sequence, so that the storage of the data can be continuously completed by using the memory with the specified size in the media gateway controller, the memory is saved, and meanwhile, the encoding and decoding are sequentially performed, and the accuracy of the faxes is improved.
S300, after the media gateway controller extracts the first decoded data in the first preset memory 11 and performs encoding processing to obtain second encoded data, storing the second encoded data in the second preset memory 12, where the second encoded data is stored in the second preset memory 12 in a circulating manner; wherein the second encoded data is encoded in a different manner than the first encoded data. As above, the second encoded data is stored in the second predetermined memory 12 in a circulating manner, which can save the memory of the second predetermined memory 12.
Specifically, a first encoder and a first decoder are provided in the media gateway controller, a coding mode of the first encoder is different from a coding mode of the first fax terminal, and steps S200 and S300 specifically include: the first encoded data enters the media gateway controller and is decoded by a first decoder to generate first decoded data, and the first decoded data is stored in the first preset memory 11, and then is encoded by a first encoder to generate second encoded data, and the second encoded data is stored in the second preset memory 12.
S400, the media gateway controller sends the second coded data to a second fax terminal.
Specifically, the second fax terminal includes a second digital signal processor; in the step S400, the media gateway controller extracts the second encoded data from the second preset memory 12 and sends the second encoded data to the second digital signal processor.
Further, the step S400 is followed by a step S500:
and the second fax terminal receives the second coded data, decodes the second coded data and sends the second coded data to the second fax machine.
Specifically, the second fax terminal further includes a second time division multiplexing interface and a second external exchange station, and the step S500 specifically includes: and the second digital signal processor decodes the second coded data, sends the second coded data to the second external exchange station through the second time division multiplexing interface, and then sends the second decoded data to the second fax machine. The second digital signal processor decodes in a manner different from that of the first decoder.
When two fax terminals transmit signals in different coding modes, a first fax terminal acquires data, directly codes the data into first coded data and then sends the first coded data to a media gateway controller, decodes the first coded data into first decoded data in the media gateway controller and stores the first decoded data in a first preset memory 11; and then when the first coded data is sent to a second fax terminal, the first decoded data is taken out from the first preset memory 11, the first decoded data is coded into second coded data, and the coded second coded data is sent to the second fax terminal by using a coding mode different from that of the first coded data. When the coding modes supported by the two fax terminals are different, transcoding can be performed only by occupying the memory with the specified size of the media gateway controller, the respective coding modes of the first fax terminal and the second fax terminal are reserved, the success rate of faxing is improved, and meanwhile, efficient faxing is completed. The use experience of the user is improved.
Further, the transcoding method of the fax terminal according to the present invention can also run in reverse direction, and includes the steps of:
the second fax terminal acquires data, encodes the data to obtain third encoded data, and then sends the third encoded data to the media gateway controller;
after receiving the third encoded data transmitted by the second fax terminal, the media gateway controller performs decoding processing to obtain third decoded data, and stores the third decoded data in the second preset memory 12;
the media gateway controller extracts the third decoded data in the second preset memory 12, performs coding processing to obtain fourth coded data, and stores the fourth coded data in the first preset memory 11; wherein the fourth encoded data is encoded in a different manner than the third encoded data;
and the media gateway controller transmits the fourth coded data to the first fax terminal.
Therefore, the second fax terminal can send the fax to the first fax terminal in the same mode conveniently, and the success rate of mutual fax is improved on the basis that the respective coding modes of the first fax terminal and the second fax terminal are reserved.
Specifically, as shown in fig. 5, a plurality of first decoding data are sequentially arranged in the first preset memory 11; the plurality of third decoded data are sequentially arranged in the second predetermined memory 12. The multiple faxes are not interfered with each other and can be carried out efficiently and orderly.
Specifically, the first preset memory 11 sequentially stores first decoding data and fourth encoding data according to a generation sequence, and the second preset memory 12 sequentially stores second encoding data and third decoding data according to the generation sequence, so that data are stored orderly, and the accuracy and the success rate of faxing are improved. And, after the first preset memory 11 and the second preset memory 12 are saturated, the reformed data sequentially covers the first decoded data, the second encoded data, the third decoded data and the fourth encoded data. The first preset memory 11 and the second preset memory 12 are not interfered with each other, so that the error of mutual transmission between the first fax terminal and the second fax terminal is reduced, and the success rate of faxing is further improved.
Specifically, the encoding method of the present invention includes, but is not limited to, encoding methods defined in the t.30 fax protocol and the t.38 fax protocol.
Specifically, the decoding method according to the present invention includes, but is not limited to, decoding methods defined in the t.30 fax protocol and the t.38 fax protocol.
Referring to fig. 6, based on the above transcoding method for the fax terminal, the present invention further provides a transcoding device for the fax terminal, where the transcoding device includes: a processor 22, and a storage 21 connected to the processor; the storage 21 stores a transcoding method program of a fax terminal, and when executed by the processor 21, the transcoding method program of the fax terminal implements the following steps:
the first fax terminal acquires data, performs coding processing on the data to obtain first coded data, and sends the first coded data to the processor 22;
after receiving the first encoded data transmitted by the first fax terminal, the processor 22 performs decoding processing to obtain first decoded data, and stores the first decoded data in the storage 10;
the processor 22 extracts the first decoded data in the storage 21, performs encoding processing to obtain second encoded data, and stores the second encoded data in the storage 10; wherein the second encoded data is encoded in a different manner than the first encoded data;
the processor 22 transmits the second encoded data to a second fax terminal.
Further, when the storage 21 stores the transcoding method program of the fax terminal, the storage 21 uses a circular memory; the first decoded data and the second encoded data are sequentially arranged in the circular memory.
Referring to fig. 7, based on the above transcoding method of the fax terminal, the present invention further provides a transcoding system of the fax terminal, and in this embodiment, the system provided with the transcoding method program of the fax terminal may be divided into one or more modules, and the one or more modules are stored in the storage and executed by one or more processors, so as to complete the present invention. In fig. 7, the system in which the transcoding method program of the fax terminal is installed may be divided into a receiving module 31, a decoding module 32, an encoding module 33, a storage module 34, and a transmitting module 35. The following description will specifically describe the functionality of the modules 31-35.
A receiving module 31, configured to receive first encoded data;
a decoding module 32 for decoding the first encoded data into first decoded data;
an encoding module 33 for encoding the first decoded data into second encoded data;
a storage module 34, configured to store the first decoded data and the second encoded data;
and a sending module 35, configured to send the second encoded data.
Based on the foregoing embodiments, the present invention further provides a storage medium, where the storage medium stores one or more programs, and the one or more programs are executable by one or more processors to implement the steps of the transcoding method of the fax terminal, described in any one of the above embodiments.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A transcoding method of a fax terminal is characterized by comprising the following steps:
the first fax terminal acquires data, encodes the data to obtain first encoded data, and then sends the first encoded data to the media gateway controller;
after receiving the first coded data transmitted by the first fax terminal, the media gateway controller performs decoding processing to obtain first decoded data, and stores the first decoded data in a first preset memory, wherein the first decoded data is circularly stored in the first preset memory;
the media gateway controller extracts the first decoding data in the first preset memory, performs coding processing to obtain second coding data, and stores the second coding data in a second preset memory, wherein the second coding data are circularly stored in the second preset memory; wherein the second encoded data is encoded in a different manner than the first encoded data;
and the media gateway controller transmits the second coded data to a second fax terminal.
2. The transcoding method of the fax terminal according to claim 1, wherein the media gateway controller extracting the first decoded data in the first predetermined memory comprises:
and after detecting the fax signal tone in the first preset memory, the media gateway controller extracts the first decoding data in the first preset memory.
3. The transcoding method of the fax terminal according to claim 1, wherein a plurality of the first decoded data are sequentially arranged in the first preset memory; and the second coded data are sequentially arranged in the second preset memory.
4. The transcoding method of the fax terminal according to claim 1, wherein the first fax terminal comprises: a first foreign exchange station, a first time division multiplexing interface and a first digital signal processor; the first fax terminal acquires data and performs coding processing on the data to obtain first coded data, and the method comprises the following steps:
the first external exchange station acquires data sent by a first fax machine, and sends the data to the first digital signal processor through a first time division multiplexing interface for coding to obtain first coded data.
5. The transcoding method of the fax terminal according to claim 1, wherein the second fax terminal comprises a second digital signal processor; the media gateway controller transmitting the second encoded data to a second fax terminal, comprising the steps of:
and the media gateway controller takes out the second coded data from the second preset memory and sends the second coded data to the second digital signal processor.
6. The transcoding method of the fax terminal according to claim 5, wherein the second fax terminal comprises a second time division multiplexing interface and a second external switching station, and after the media gateway controller transmits the second encoded data to the second fax terminal, the method further comprises the steps of:
and the second digital signal processor decodes the second coded data, transmits the second coded data to the second external exchange station through the second time division multiplexing interface, and then transmits the data to the second fax machine.
7. A transcoding apparatus of a facsimile terminal, comprising: a processor, and a memory coupled to the processor;
the storage stores a transcoding method program of the fax terminal, and when the transcoding method program of the fax terminal is executed by the processor, the following steps are realized:
the first fax terminal acquires data, encodes the data to obtain first encoded data, and then sends the first encoded data to the processor;
the processor receives the first coded data transmitted by the first fax terminal, decodes the first coded data to obtain first decoded data, and stores the first decoded data in the storage;
the processor extracts the first decoding data in the storage, performs coding processing to obtain second coding data, and stores the second coding data in the storage; wherein the second encoded data is encoded in a different manner than the first encoded data;
and the processor transmits the second coded data to a second fax terminal.
8. The transcoding device of a fax terminal as claimed in claim 7, wherein when the storage stores a transcoding method program of a fax terminal, the storage uses a circular memory; the first decoded data and the second encoded data are sequentially arranged in the circular memory.
9. A transcoding system of a fax terminal, comprising:
a receiving module, configured to receive first encoded data;
a decoding module for decoding the first encoded data into first decoded data;
an encoding module for encoding the first decoded data into second encoded data;
the storage module is used for storing the first decoding data and the second encoding data;
and the sending module is used for sending the second coded data.
10. A storage medium storing one or more programs, the one or more programs being executable by one or more processors to perform the steps of the method of transcoding a fax terminal according to any one of claims 1-6.
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