CN101527093A - Digital terminal supporting Braille input and Braille input method - Google Patents
Digital terminal supporting Braille input and Braille input method Download PDFInfo
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- CN101527093A CN101527093A CN200910038875A CN200910038875A CN101527093A CN 101527093 A CN101527093 A CN 101527093A CN 200910038875 A CN200910038875 A CN 200910038875A CN 200910038875 A CN200910038875 A CN 200910038875A CN 101527093 A CN101527093 A CN 101527093A
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Abstract
The invention relates to a digital terminal supporting Braille input and a Braille input method, wherein the digital terminal comprises a key input unit including a Braille position input key group and an operation functional key group, a key identification unit, a Braille processing unit, an application layer unit, a character and speech synthesis unit, an audio frequency drive unit and an audio frequency generating unit, wherein the audio frequency driving unit is used for driving the audio generating unit to generate audio frequency. The digital terminal supporting Braille input and the Braille input method can realize barrier-free character communication between the blind and persons with vision disorder, thereby being beneficial to popularization and application.
Description
Technical field
The present invention relates to the braille input technology, be specifically related to a kind of digital terminal of braille input and method of braille input thereof supported.
Background technology
According to authoritative institution's statistics, at present, there are 4,500 ten thousand above blind persons in the whole world.Only in China, the number of blind person and people with visual impairment is just more than 5,000,000, is one of serious country of blind person and vision impairment in the world.These people need special help could be competent at daily life, and technical development still still has a lot of aspects convenient freely not as good as the normal personage of eyesight also for their daily life and work have brought a lot of changes targetedly in recent years.
In today of infotech fast development, as long as the information products at blind person's exploitation concentrate on the communication terminal of developing the input of support braille, carrying out short message sends, and reasonable application value and technique effect have been obtained, for blind person and vision disorder personage enjoy that facility that infotech brings provides may, but, this technology also is to only limit to make the blind person can carry out the input and the transmission of short message, can not realize that blind person and vision disorder personage use information products to carry out other written communication, also seldom there is the infotech of other type to be applied among blind person and the vision disorder personage, make blind person and vision disorder personage can enjoy the facility that other information products of being developed at the normal personage of eyesight bring, the quite ripe digital audio product (mp3 of technology for example, mp4) and digital product of other marketization at the normal personage of eyesight exploitation, or say so that to make the accessible personage of blind person and eyesight be media with the digital product with convenient literal interchange of realization freely, also there be not too many relating to develop in the prior art with specific aim, generally speaking, also there is not a kind of Related product that can realize blind person and vision disorder personage's accessible written communication well in the prior art.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, the digital terminal of the braille that provides support input, digital terminal of the present invention can be realized blind person and vision disorder personage's accessible written communication.
Another object of the present invention is to provide the Braille input of the digital terminal of above-mentioned support braille input.
Purpose of the present invention is achieved through the following technical solutions: support the digital terminal of braille input, comprising:
Key-press input unit comprises braille point position enter key group who is used for the information input of braille point position and the functional key group who is used to carry out routine operation;
The key recognition unit, whether the button that is used to discern key-press input unit is operated the output key operation information;
The braille processing unit, be used for the button operation information translation that the user imports by braille point position enter key group is become qualified common character string output, and user's selected common character conversion from common character string become the output of standard computer coding, and carry out corresponding routine operation by the button operation information of functional key group input according to the user;
The application layer unit, be used for by himself standard input interface acceptance criteria computer code and carry out respective handling, export corresponding character string by the standard output interface of himself then;
The text-to-speech synthesis unit is used to receive the character string that common character string that the braille processing unit transmits or application layer unit transmit, and the output of Composite tone information;
The audio driven unit is used to receive audio-frequency information, drives the audio frequency generating unit according to audio-frequency information;
The audio frequency generating unit is by audio driven unit drives generation audio frequency.
Preferably, the present invention supports the digital terminal of braille input also to comprise the output filtering unit, be used for the character string of application layer unit output is filtered, and the character string after will filtering is sent into the text-to-speech synthesis unit.
Described audio frequency generating unit is the DA generating means.
Preferably, described application layer unit stores one or more in the functional application such as voice playing, notepad, address book, internet, Email.When storing functional application such as internet, Email, described application layer unit also is provided with network connection unit.This internet function application program is preferably network download functional application, web page browsing functional application etc.
Preferably, described braille processing unit comprises:
Information translation unit, braille point position is used for the user is become by the button operation information translation of braille point position enter key group input the braille point position information and the output of correspondence;
Braille point position information memory cell is used to store the braille point position information of exporting information translation unit, braille point position;
Store the braille point bit pattern recognition unit of standard Braille table, be used for braille point position information being made up identification according to the Braille table, and the corresponding Braille of output;
The phonetic identification and the converting unit of the common character pinyin table of the standard that stores are used for according to common character pinyin table Braille being made up identification, and the corresponding common character string phonetic of output;
Store the common character conversion unit of the common character list of standard, be used for identifying qualified common character string and output according to common character string phonetic;
The code conversion module, to be used for the common character conversion that the user selects from the common character string of common character conversion unit output be the standard computer coding and output to the application layer unit.
The braille point position enter key group of described key-press input unit has 6 buttons, and putting in order of these 6 buttons is corresponding one by one with the arrangement position of standard braille point position.
Preferably, the braille point of described key-press input unit position enter key group and functional key group be in respectively key-press input unit operating surface just, the back side, perhaps with the left and right position of one side or with the upper and lower position of one side.
Preferably, described braille point position enter key group is set to the bimanualness layout, and 2 groups carried out layout about promptly 6 buttons of braille point position enter key group were divided into.
The functional key group of described key-press input unit comprises system start-up key, input delete key, input validation key, input ESC Escape, page upturning key and page downturning key.
Wherein, the system start-up key is used for starting and shutdown system, the input delete key is used to delete the key information of user's input, input validation key user confirms the key information that the user imports, the input ESC Escape is used to make system to withdraw from the button input state, page upturning key and page downturning key be used for to braille processing unit output be to turn on 1 page common character carries out or turn over operation down with n common character, call in preceding 1 page or back 1 page of qualified common character output and prompting user selection.
Preferably, described functional key group also is set to the bimanualness layout, and 2 groups carried out layout about promptly above-mentioned 6 functional key were divided into.
The Braille input of the digital terminal of above-mentioned support braille input comprises the steps:
A, user enter after by the button start-up system among the functional key group and wait for the button input state;
B, user carry out the button input according to standard Braille structure on the braille point position enter key group of key-press input unit;
Whether C, key recognition unit identification braille point position enter key group's button is operated, and then exports braille point position enter key group's button operation information in this way, continues to wait for the button input otherwise return steps A;
D, braille processing unit become qualified common character string to output to the text-to-speech synthesis unit by the button operation information translation that braille point position enter key group imports the user;
E, text-to-speech synthesis unit are with qualified common character string Composite tone information output audio driver element;
F, audio driven unit receive the audio-frequency information that the text-to-speech synthesis unit transmits, drive the audio frequency generating unit according to audio-frequency information and export qualified common character string in the audio frequency mode, the user is selected concrete common character from qualified common character string, exports this selected common character by audio driven unit drives audio frequency generating unit in the audio frequency mode by the synthetic back of text-to-speech synthesis unit again;
The common character conversion that G, braille processing module will be selected becomes the standard computer coding to output to the application layer unit;
H, application layer unit by himself standard input interface acceptance criteria computer code and carry out respective handling, export corresponding character string by the standard output interface of himself then;
I, text-to-speech synthesis unit receive the character string that the application layer unit transmits, and the output of Composite tone information;
J, audio driven unit receive the audio-frequency information that the text-to-speech synthesis unit transmits, and export this audio-frequency information according to this audio-frequency information driving audio frequency generating unit in the audio frequency mode;
The user carries out button operation by the functional key group, the key recognition unit identifies the user and carries out routine operation by the button operation information of functional key group input, specifically: if the user withdraws from the key information operation by functional key group input, then system will withdraw from the button input state; If import the operation of deletion key information by the functional key group, then delete the user by the information that braille point position enter key group is imported, because functional key group's input technology has been very ripe prior art, do not do detailed description here.
In the said method, described braille processing unit becomes qualified common character string with the user by the button operation information translation that braille point position enter key group imports, and concrete operations are as follows:
A. information translation unit, braille point position becomes the user braille point position information and the output of correspondence by the button operation information translation of braille point position enter key group input;
B. braille point position information memory cell is stored the braille point position information of braille point position information translation unit output;
C. if the user passes through functional key input validation information, the braille point bit pattern recognition unit that stores standard Braille table makes up identification according to the Braille table to braille point position information, if recognition result is correct for input, and the corresponding Braille of output, if to be input incorrect then removes the braille point information that braille point position information memory cell is stored for recognition result, return steps A and continue to wait for the button input, if, then returning steps A not by functional key input validation information, the user continues to wait for the button input;
D. the phonetic identification and the converting unit that store the common character pinyin table of standard make up identification according to common character pinyin table to Braille, judge whether the input of braille phonetic is finished, if finish, the corresponding common character string phonetic of output then, otherwise and return steps A and continue to wait for the button input;
E. the common character conversion unit that stores the common character list of standard identifies qualified common character string and output according to common character string phonetic, returns steps A then and continues to wait for the button input.
The condition of described qualified common character string promptly is that common character string is the common character string of unisonance.
Preferably, the common character pinyin table of standard that described phonetic is discerned and converting unit is stored is phonetic transcriptions of Chinese characters table or Japanese pinyin table.
In the said method, described braille processing unit becomes qualified common character string to output to the text-to-speech synthesis unit by the button operation information translation that braille point position enter key group imports the user, because the pairing common character of qualified common character string has a lot of, so being 1 page with qualified n common character, the braille processing unit outputs to the text-to-speech synthesis unit one by one, by the text-to-speech synthesis unit this n common character passed through the audio driven unit, export in the audio frequency mode and point out the user to select to drive the audio frequency generating unit, the user is by selected wherein 1 the common character of selecting of functional key, when the user need select qualified other common character, can call in other 1 page of qualified common character output and the prompting user selects by functional key order braille processing unit.
Preferably, described n is 6, so just can be corresponding with 6 buttons of braille point position enter key group, and 6 common characters that the user can export in the audio frequency mode the audio frequency generating unit by these 6 keys are easily selected.
In the said method, the described application layer of step H unit stores one or more in the functional application such as voice playing, notepad, address book, internet, Email.When storing functional application such as internet, Email, described application layer unit also is provided with network connection unit.This internet function application program is preferably network download functional application, web page browsing functional application etc.Like this, application layer is handled the standard computer coding according to the functional application of being stored, and finishes the specific function of functional application, and exports corresponding character string.
In the said method, after corresponding character string is exported in the described application layer of step H unit, at first be input to the output filtering unit, by the output filtering unit character string is filtered, filtering some because after the garbages such as interference that self defining programm etc. causes, the character string after will filtering is again sent into the text-to-speech synthesis unit.
The present invention has following advantage and effect with respect to prior art: the present invention is directed to user's exploitations such as blind person and vision disorder personage, the user can realize the input of braille point position information by braille point position enter key group, key recognition unit, and then the braille processing unit is finished conversion from braille point position information to common character string automatically again, selected with the common character string that voice mode prompting user specifically needs by the audio frequency generating unit, it is very convenient, quick that blind person and vision disorder personage carry out practical operation.And, the application layer unit can be handled voluntarily accordingly to the standard computer coding that is converted to by user-selected common character string, finish specific function, and by standard input and output interface with the external world exchange, the character string of being exported realizes audible communication by the text-to-speech synthesis unit, thereby has realized blind person and vision disorder personage's accessible written communication well.In addition, multi-functional operations such as voice playing (as the MP3 music), notepad, address book, internet, Email can be realized according to user's input and the specifying information of selecting and the functional application of being stored in application layer of the present invention unit; Braille point position enter key group in the operating surface of digital terminal of the present invention can be designed to different layout type according to the custom of different user with the feature operation button; Speech habits by the user can can be applied to the common character string pinyin table of standard that phonetic is discerned and converting unit is stored in the customer group of various languages for phonetic transcriptions of Chinese characters table, Japanese pinyin table etc.; Simultaneously, the user can carry out conventional operation by the functional key group.When the present invention carried out the braille input, various storage unit were stored braille point position information, each converting unit all stores relevant character list, the processing speed height because the braille processing unit is provided with.In addition, digital terminal integrated level height of the present invention, simple to operate, directly perceived, more help applying.
Description of drawings
Fig. 1 is the structural drawing of the digital terminal of the support braille input in the present embodiment;
Fig. 2 is the key arrangement figure that supports the braille point position enter key group of the digital terminal that braille is imported in the present embodiment;
Fig. 3 is the key arrangement figure that supports the functional key group of the digital terminal that braille is imported in the present embodiment;
Fig. 4 is the process flow diagram of the inventive method.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention supports the digital terminal of braille input, comprising:
Key-press input unit comprises braille point position enter key group who is used for the information input of braille point position and the functional key group who is used to carry out routine operation;
The key recognition unit, whether the button that is used to discern key-press input unit is operated the output key operation information;
The braille processing unit, be used for the button operation information translation that the user imports by braille point position enter key group is become qualified common character string output, and user's selected common character conversion from common character string become the output of standard computer coding, and carry out corresponding routine operation by the button operation information of functional key group input according to the user;
The application layer unit is used for the standard input interface acceptance criteria computer code by himself, and carries out respective handling, exports corresponding character string by the standard output interface of himself then;
The text-to-speech synthesis unit is used to receive the character string that common character string that the braille processing unit transmits or application layer unit transmit, and the output of Composite tone information;
The audio driven unit is used to receive audio-frequency information, drives the audio frequency generating unit according to audio-frequency information;
The audio frequency generating unit is used for by audio driven unit drives generation audio frequency.
Preferably, the present invention supports the digital terminal of braille input also to comprise the output filtering unit, be used for the character string of application layer unit output is filtered, and the character string after will filtering is sent into the text-to-speech synthesis unit.
Described audio frequency generating unit is the DA generating means.
The present invention supports the digital terminal of braille input can be structured on the embedded system, and embedded system comprises following hardware: MCU, internal memory, Flash, DA generating means (sound card), keyboard, can also comprise network connecting part etc.
The present invention supports the digital terminal of braille input can be divided into three layers: ground floor is operating system and hardware layer, operating system includes key recognition unit, audio driven unit, operating system management and driving hardware, hardware layer includes the DA generating means and key-press input unit is a keyboard; The second layer is the Master layer, and it comprises three unit: braille processing unit, text-to-speech synthesis unit and output filtering unit; The 3rd layer is the Slave layer that is provided with the application layer unit.
Preferably, described braille processing unit comprises:
Information translation unit, braille point position is used for the user is become by the button operation information translation of braille point position enter key group input the braille point position information and the output of correspondence;
Braille point position information memory cell is used to store the braille point position information of exporting information translation unit, braille point position;
Store the braille point bit pattern recognition unit of standard Braille table, be used for braille point position information being made up identification according to the Braille table, and the corresponding Braille of output;
The phonetic identification and the converting unit of the common character pinyin table of the standard that stores are used for according to common character pinyin table Braille being made up identification, and the corresponding common character string phonetic of output;
Store the common character conversion unit of the common character list of standard, be used for identifying qualified common character string and output according to common character string phonetic;
The code conversion module, to be used for the common character conversion that the user selects from the common character string of common character conversion unit output be the standard computer coding and output to the application layer unit.
Preferably, the common character pinyin table of standard that described phonetic is discerned and converting unit is stored is the phonetic transcriptions of Chinese characters table.
The braille point position enter key group of described key-press input unit has 6 buttons, and putting in order of these 6 buttons is corresponding one by one with the arrangement position of standard braille point position.
The braille point of described key-press input unit position enter key group and functional key group can be in respectively keyboard operation face just, the back side, perhaps with the left and right position of one side or with the upper and lower position of one side.
Described braille point position enter key group can be set to the bimanualness layout, and 2 groups carried out layout about promptly 6 buttons of braille point position enter key group were divided into.
The functional key group of described key-press input unit comprises system start-up key, input delete key, input validation key, input ESC Escape, page upturning key and page downturning key.
Wherein, the system start-up key is used for starting and shutdown system, the input delete key is used to delete the key information of user's input, input validation key user confirms the key information that the user imports, the input ESC Escape is used to make system to withdraw from the button input state, page upturning key and page downturning key be used for to braille processing unit output be to turn on 1 page common character carries out or turn over operation down with n common character, call in preceding 1 page or back 1 page of qualified common character output and prompting user selection.
Preferably, described functional key group also is set to the bimanualness layout, and 2 groups carried out layout about promptly above-mentioned 6 functional key were divided into.
The preferred braille point of present embodiment position enter key group is arranged on the back side that key-press input unit is a keyboard operation face, and the functional key group is arranged on the front of keyboard operation face.Wherein, braille point position enter key group has 6 buttons (button 1, button 2, button 3, button 4, button 5 and button 6), as shown in Figure 2,6 points of the respectively corresponding standard braille point of these 6 buttons position, button 1, button 2 and button 3 are positioned at the left side at the back side of keyboard operation face, and be arranged in order from top to bottom, button 4, button 5 and button 6 are positioned at the right at the back side of keyboard operation face, and also be arranged in order from top to bottom, so just, make things convenient for the user to carry out the both hands button operation corresponding to user's right-hand man.
And 6 keys of functional key group (system start-up key, input delete key, input validation key, input ESC Escape, page upturning key and page downturning key) carry out the both hands button operation for convenience of the user, also be set to the distribution form on left and right limit, as shown in Figure 3, wherein, input delete key, input ESC Escape and system start-up key are positioned at the left side in the front of keyboard operation face, and are arranged in order from top to bottom; Input validation key, page upturning key and page downturning key are positioned at the right in the front of keyboard operation face, and are arranged in order from top to bottom.
The preferred Braille input of digital terminal of above-mentioned support braille input as shown in Figure 4, comprises the steps:
A, user enter after by the system start-up key start-up system among the functional key group and wait for the button input state:
B, user carry out the button input according to standard Braille structure on the braille point position enter key group of key-press input unit;
Whether C, key recognition unit identification braille point position enter key group's button is operated, and then exports braille point position enter key group's button operation information in this way, continues to wait for the button input otherwise return steps A;
D, braille processing unit become qualified common character string to output to the text-to-speech synthesis unit by the button operation information translation that braille point position enter key group imports the user, and be specific as follows:
D.a. information translation unit, braille point position becomes the user braille point position information and the output of correspondence by the button operation information translation of braille point position enter key group input;
D.b. braille point position information memory cell is stored the braille point position information of braille point position information translation unit output;
D.c. if the user passes through functional key input validation information, the braille point bit pattern recognition unit that stores standard Braille table makes up identification according to the Braille table to braille point position information, if recognition result is correct for input, and the corresponding Braille of output, if to be input incorrect then removes the braille point information that braille point position information memory cell is stored for recognition result, and return steps A and continue to wait for the button input, if, then returning steps A not by functional key input validation information, the user continues to wait for the button input;
D.d. the phonetic identification and the converting unit that store the common character pinyin table of standard make up identification according to common character pinyin table to Braille, judge whether the input of braille phonetic is finished, if finish, then the corresponding common character string phonetic of output continues to wait for the button input otherwise return steps A;
D.e. the common character conversion unit that stores the standard Chinese character character list identifies the Chinese character string of unisonance and the Chinese character and the explanation thereof of output 1 page of 6 unisonance wherein according to Chinese character string phonetic;
E, text-to-speech synthesis unit are with the Chinese character of 1 page of 6 unisonance and explain Composite tone information output audio driver element;
F, audio driven unit receive the audio-frequency information that the text-to-speech synthesis unit transmits, drive the audio frequency generating unit is exported 1 page of 6 unisonance in the audio frequency mode Chinese character and interpret prompts user selection thereof according to audio-frequency information, described Chinese character explains it is that the user discerns concrete Chinese character for convenience, as Chinese character is " I ", the output voice be " first: I, we I."; when the user need select the Chinese character of other unisonance; can select; the concrete key of user by pressing braille point position key group is from the selected concrete Chinese character of the Chinese character of 1 page of 6 unisonance by Chinese character output and the prompting user that functional key order braille processing unit is called in preceding 1 page or back 1 page unisonance; as press the 1st Chinese character that key 1 has promptly been selected this page or leaf; export this selected Chinese character by audio driven unit drives audio frequency generating unit in the audio frequency mode by the synthetic back of text-to-speech synthesis unit then, return steps A continuation wait button then and import;
G, transcoder unit are selected concrete Chinese character with the user and are converted the standard computer coding to and output to the application layer unit;
H, application layer unit by himself standard input interface acceptance criteria computer code and carry out respective handling, export corresponding character string by the standard output interface of himself then;
I, text-to-speech synthesis unit receive the character string that the application layer unit transmits, and the output of Composite tone information;
J, audio driven unit receive the audio-frequency information that the text-to-speech synthesis unit transmits, and export this audio-frequency information according to this audio-frequency information driving audio frequency generating unit in the audio frequency mode;
If the key recognition unit recognizes the input ESC Escape that the user has been pressed into functional key, then system will withdraw from the button input state and promptly finish the braille input operation.
In the said method, the user can also carry out button operation by other button of functional key group, and the key recognition unit identifies the user and carries out routine operation by the button operation information of functional key group input.
In the said method,, then delete the user,, do not do detailed description here because functional key group's input technology has been very ripe prior art by the information that braille point position enter key group is imported if press input deletion button by the user.
In the said method, after the standard information of application layer unit output correspondence, can also at first be input to the output filtering unit, by the output filtering unit character string is filtered, filtering some because after the garbages such as interference that self defining programm etc. causes, the character string after will filtering is again sent into the text-to-speech synthesis unit.
In the said method, the described application layer of step H unit stores one or more in the functional application such as voice playing, notepad, address book, internet, Email.When storing functional application such as internet, Email, described application layer unit also is provided with network connection unit.This internet function application program is preferably network download functional application, web page browsing functional application etc.Like this, application layer is handled the standard computer coding according to the functional application of being stored, and finishes the specific function of functional application, and exports corresponding character string.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1, support the digital terminal of braille input, it is characterized in that, comprising:
Key-press input unit comprises braille point position enter key group who is used for the information input of braille point position and the functional key group who is used to carry out routine operation;
The key recognition unit, whether the button that is used to discern key-press input unit is operated the output key operation information;
The braille processing unit, be used for the button operation information translation that the user imports by braille point position enter key group is become qualified common character string output, and user's selected common character conversion from common character string become the output of standard computer coding, and carry out corresponding routine operation by the button operation information of functional key group input according to the user;
The application layer unit, be used for by himself standard input interface acceptance criteria computer code and carry out respective handling, export corresponding character string by the standard output interface of himself then;
The text-to-speech synthesis unit is used to receive the character string that common character string that the braille processing unit transmits or application layer unit transmit, and the output of Composite tone information;
The audio driven unit is used to receive audio-frequency information, drives the audio frequency generating unit according to audio-frequency information;
The audio frequency generating unit is used for by audio driven unit drives generation audio frequency.
2, the digital terminal of support braille input according to claim 1, it is characterized in that: described braille processing unit comprises:
Information translation unit, braille point position is used for the user is become by the button operation information translation of braille point position enter key group input the braille point position information and the output of correspondence;
Braille point position information memory cell is used to store the braille point position information of exporting information translation unit, braille point position;
Store the braille point bit pattern recognition unit of standard Braille table, be used for braille point position information being made up identification according to the Braille table, and the corresponding Braille of output;
The phonetic identification and the converting unit of the common character pinyin table of the standard that stores are used for according to common character pinyin table Braille being made up identification, and the corresponding common character string phonetic of output;
Store the common character conversion unit of the common character list of standard, be used for identifying qualified common character string and output according to common character string phonetic;
The code conversion module, to be used for the common character conversion that the user selects from the common character string of common character conversion unit output be the standard computer coding and output to the application layer unit.
3, a kind of Braille input of supporting the digital terminal of braille input is characterized in that, may further comprise the steps:
A, user enter after by the button start-up system among the functional key group and wait for the button input state;
B, user carry out the button input according to standard Braille structure on the braille point position enter key group of key-press input unit;
Whether C, key recognition unit identification braille point position enter key group's button is operated, and then exports braille point position enter key group's button operation information in this way, continues to wait for the button input otherwise return steps A;
D, braille processing unit become qualified common character string to output to the text-to-speech synthesis unit by the button operation information translation that braille point position enter key group imports the user;
E, text-to-speech synthesis unit are with qualified common character string Composite tone information output audio driver element;
F, audio driven unit receive the audio-frequency information that the text-to-speech synthesis unit transmits, drive the audio frequency generating unit according to audio-frequency information and export qualified common character string in the audio frequency mode, the user is selected concrete common character from qualified common character string, exports this selected common character by audio driven unit drives audio frequency generating unit in the audio frequency mode by the synthetic back of text-to-speech synthesis unit again;
The common character conversion that G, braille processing module will be selected becomes the standard computer coding to output to the application layer unit;
H, application layer unit by himself standard input interface acceptance criteria computer code and carry out respective handling, export corresponding character string by the standard output interface of himself then;
I, text-to-speech synthesis unit receive the character string that the application layer unit transmits, and the output of Composite tone information;
J, audio driven unit receive the audio-frequency information that the text-to-speech synthesis unit transmits, and export this audio-frequency information according to this audio-frequency information driving audio frequency generating unit in the audio frequency mode;
The user carries out button operation by the functional key group, and the key recognition unit identifies the user and carries out routine operation by the button operation information of functional key group input.
4, the digital terminal of support braille input according to claim 3 is realized the method for braille input, it is characterized in that: the described braille processing unit of step D becomes qualified common character string to output to the text-to-speech synthesis unit by the button operation information translation that braille point position enter key group imports the user, specifically be to be 1 page with qualified n common character to output to the text-to-speech synthesis unit one by one, by the text-to-speech synthesis unit this n common character passed through the audio driven unit, export in the audio frequency mode and point out the user to select to drive the audio frequency generating unit, the user is by selected wherein 1 the common character of selecting of functional key, when the user need select qualified other common character, call in other 1 page of qualified common character output and the prompting user selects by functional key order braille processing unit.
5, the digital terminal of support braille input according to claim 4 is realized the method for braille input, and it is characterized in that: described n is 6.
6, the digital terminal of support braille input according to claim 3 is realized the method for braille input, it is characterized in that: the described braille processing unit of step D becomes qualified common character string with the user by the button operation information translation that braille point position enter key group imports, and concrete operations are as follows:
A. information translation unit, braille point position becomes the user braille point position information and the output of correspondence by the button operation information translation of braille point position enter key group input;
B. braille point position information memory cell is stored the braille point position information of braille point position information translation unit output;
C. if the user passes through functional key input validation information, the braille point bit pattern recognition unit that stores standard Braille table makes up identification according to the Braille table to braille point position information, if recognition result is correct for input, and the corresponding Braille of output, if to be input incorrect then removes the braille point information that braille point position information memory cell is stored for recognition result, return steps A and continue to wait for the button input, if, then returning steps A not by functional key input validation information, the user continues to wait for the button input;
D. the phonetic identification and the converting unit that store the common character pinyin table of standard make up identification according to common character pinyin table to Braille, judge whether the input of braille phonetic is finished, if finish, the corresponding common character string phonetic of output then, otherwise and return steps A and continue to wait for the button input;
E. the common character conversion unit that stores the common character list of standard identifies qualified common character string and output according to common character string phonetic, returns steps A then and continues to wait for the button input.
7, realize the method for braille input according to the digital terminal of each the described support braille input in the claim 3,4,6, it is characterized in that: the condition of described qualified common character string is: common character string is the common character string of unisonance.
8, Braille input according to claim 6 is characterized in that: the common character pinyin table of standard that described phonetic identification and converting unit are stored is phonetic transcriptions of Chinese characters table or Japanese pinyin table.
9, Braille input according to claim 3, it is characterized in that: behind the described application layer of the step H unit output corresponding characters string, at first be input to the output filtering unit, by the output filtering unit character string filtered, the character string after will filtering is again sent into the text-to-speech synthesis unit.
10, Braille input according to claim 3, it is characterized in that: the described application layer of step H unit stores one or more in voice playing functional application, notepad functional application, address book functional application, internet function application program, the e-mail function application program, when storing internet function application program or e-mail function application program, described application layer unit also is provided with network connection unit.
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