CN1474407A - Device for synchronously playing audio frequency and picture and text - Google Patents

Abstract

The present invention relates to a kind of device for playing synchronously audio and picture and text. The device has laser record as carrier, and may be used in playing audio signal and displaying picture and text, so that it may provide various voiceful and voiceless readings and coordinate visual and acoustical training mode. The present invention may be used in learning foreign language and other subjects and as one device for reading various voiceful and voiceless readings. The device consists of micro controller, memory, display, keyboard, audio system and CD driver. During playing voice in CD, the text stored in the CD may displayed in the display. The key technology of playing synchronously the voice and the text is to control script code.

Description

The equipment of a kind of synchronously playing audio frequency and picture and text

The present invention relates to the equipment of a kind of synchronously playing audio frequency and picture and text, it uses laser disc as carrier, under the control of program, except arbitrarily playing sound, can also show picture and text synchronously, sound or noiseless outer, reading matter of Chinese contrast or common picture and text reading matter also can be provided.

Along with the reform and opening-up of China, the people's cultural quality constantly is improved, and increasing people feels that learning foreign language well is a kind of society need.Increasing people finds, our foreign language teaching, especially middle and primary schools, basically just pay attention to grammer and written language and think little of listening and speaking ability, thereby, a lot of people, even comprise the graduate of institution of higher learning, though learned the foreign language in 10 years, can not understand simple spoken language unexpectedly, do not can say simple sentence.As seen, in the middle of the study of language, the cultivation of paying attention to listening and speaking ability is very urgent.Facts have proved that in the process of training listening and speaking ability, a large amount of exercises is very important, the learner need pass through the combined training of multiple maincenters such as vision, the sense of hearing, pronunciation and coordinate, and could improve language ability; And when exercise hearing teaching material, in often needing to contrast, the literal of foreign language just can be effective, simultaneously, the effect of traditional tape recording can not guarantee that the learner often complains that recording is very fuzzy, especially after transcribing several times.In addition, have many manufacturers developing e-book at present, but they have also ignored the copyright problem of reading matter simultaneously often based on the semiconductor memory of costliness, the user can duplicate and download the various reading matters that copyright is arranged in the gratis.So propose an imagination in person: develop a kind of equipment, with laser disc as carrier, except arbitrarily playing sound, can also synchronously displaying subtitle, also can provide sound or noiseless outer, reading matter that has picture and text of Chinese contrast and common picture and text reading matter, with convenient vast foreign language learner and other reader; In addition, the study of non-foreign language class comprises mathematics, physics, chemistry etc., also can utilize the present invention.

The present invention relates generally to CD, singlechip technology.The technology of relevant CD sees also international standard CD-IEC908 and ISO9660; The technology of relevant single-chip microcomputer please refer to the technical documentation of 80C186 single-chip microcomputer.

As shown in Figure 1, 2, this equipment is made up of microcontroller, internal memory, display, keyboard, audio system, optical disc apparatus.When the sound on the broadcast CD, the caption information of stores synchronized can show on display on the CD.Display is not limited to LCD, can be computer monitor, televisor even plasm TV.

Fig. 3 represents the integrated form of this equipment, that is, and and can be in a casing above-mentioned several equipment integrations.At this moment, CD drive can replace with the circuit and the mechanism of common laser disc walkman (being DISCMAN).

The gordian technique that realizes synchronous playing is a control script coded system.

The form of script coded message:

Form by a series of controll blocks, as shown in Figure 4.The content of each controll block is:

1) length of controll block is unit with the byte;

2) address of other controll block;

3) address of the beginning of audio frequency bitstream and termination;

4) operating environment information: to process information of key-press event etc.;

5) graph text information to be played;

Script control information and acoustic information are stored on the CD simultaneously, and this equipment can be by reading script information, and the function of study is finished in operations such as the binding operation environmental information is play, demonstration.If CD also can be play on common compact disc player, just should be stored in script information on the laser disc of audio format, at this moment, script control coding can only be by this recognition of devices.When adopting compressed format to carry out audio coding, such as, MP3, MP5 form, CD can be play the learning program more than 1 hour.Comprise a small library in the special controll block, comprised the mask information of used all literal of this Zhang Guangpan and icon, like this, in hardware, hard character library need not be arranged, saved cost greatly, simplified design.

Graph text information to be played has following several form:

1) Hanzi internal code is made up of two bytes; Show that it need contrast with character library,, at the beginning the time, just be read in the internal memory and go in program so small library should be arranged in first controll block; During demonstration, in small library, retrieve according to ISN, find corresponding mask information after, the font pointwise is drawn; Word of every picture, next position is pointed in the position on the screen;

2) literal mask, by 32 bytes or more multibyte form, can be Rome body, regular script, the Song typeface etc., this mode needing to be suitable for the program of font.Referring to accompanying drawing 7;

3) message bit pattern, different with the expression mode of Chinese character mask, it has size (is unit with the point), position, the gray scale type of following information: figure; Type is divided into: 24,256 grades, 16 grades, 2 grades etc.;

Referring to accompanying drawing 4, script control coding is made up of controll block, comprises in the controll block: the 1. address of the beginning of a section audio bitstream and termination; 2. operating environment information, promptly to the process information of key-press event, processing content comprise operations such as demonstration, broadcast, detection, timing; 3. wait pictograph information to be shown.Include the pointer that points to other controll block in the controll block, thereby form a reticulate texture or chain structure;

Operating environment information is made up of " incident-action schedule ", that is, be the relation of mapping between the action of incident and processing.Like this, when edit script, just can determine freely how which incident should be handled.

Following explanation of tables incident, action schedule:

Event block 0
	The address of next event block
The quantity of action
	Action
1

Action 2
	????……
Event block 1
	The address of next event block
The quantity of action
	Action
1
	Action 2
????……

Event block in the table is linked to be a chained list (in order to search conveniently, also can use two-way chained list or other data structures, see also data, the teaching material of relevant data structure), during program run, during incident in showing, will carry out corresponding action in order; These actions comprise: begin to be played to certain end of address (EOA), demonstration etc. from certain address.

Program is when handling a script, at first read first controll block, behind the address that obtains audio code stream, operating environment information, graph text information, carry out corresponding play operation, according to operating environment information processing variety of event, comprise the processing of button, the abnormality processing in the broadcast or the like then.The operation of processing events can cause program to read other controll block, thereby jumps to another controll block from a controll block, so repeatedly, thereby finishes the task of whole broadcasts.

Because most laser light mechanism all have only a shaven head, therefore just produced such problem: perhaps change track if shaven head is accidental continually because of the vibrations derailing, the situation that sound playing is interrupted will take place.For the situation of vibrations, existing technology is utilized a storer, the function that the buffer zone of realizing utilizing 10 seconds prevents to interrupt, but there is no help for the present invention, because the position of script controll block and voice data may be discontinuous.So discontinuous for playback is not produced, although the event block composition is a netted data structure, a main chain wherein should be arranged on track in order.As shown in Figure 6.Like this, when normally playing in order,, controll block do not cause the discontinuous of broadcast though in ceaselessly redirect, can not making laser head change track continually.Because controll block itself is very short, only is 1/75 or 2/75 of an about second, slight discontinuous being difficult for that causes discovered.

Compare with existing technology, the present invention combines following several technology:

Video disc recording technology, laser disc walkman (DISCMAN) technology, singlechip technology, CD drive technology, display technology etc.On the basis of these technology, owing to adopted special script control coding techniques, make above-mentioned technology can finish synchronous playing sound, captions, function such as arbitrarily search for, be very easy to the use of foreign language learner.Simultaneously because the working method of CD is that shaven head moves in the plane with reading of data, this just makes that the search location is quicker and easy than audio tape, so, than the usefulness audio tape as the same category of device of medium tangible technical advantage is arranged.

Description of drawings is as follows:

Among Fig. 1: 1 expression CD drive; 2 expression displays; The cabinet of 3 indication equipments; 4 expression keyboards;

Among Fig. 2: 1 expression CD drive; 2 expression microcontrollers; 3 expression displays; 4 expression audio decoders; 5 expression amplifying circuits; 6 expression audio output apparatus;

Among Fig. 3: 1 expression display; 2 expression buttons; 3 expression laser head mechanisms;

Among Fig. 4: 1 to n represents an end to end n controll block; B1 represents the length of controll block; B2 represents the address of other controll block; B3 represents the address of the beginning and the end of audio frequency bitstream; B4 represents operating environment information; B5 represents Word message;

Fig. 5 is the main block diagram of program;

Fig. 6 represents the fragment of CD the preceding paragraph track, wherein, N, N+1 represent two adjacent controll blocks and corresponding voice data respectively, and B (n), B (n+1) represent two control sections in the controll block respectively, the voice data part in two controll blocks of W (n), W (n+1) expression.

Accompanying drawing 7 has been represented the mask of 2 systems an of Chinese character " good " word and its correspondence to 16 systems.

Provide an example below:

System forms: controller, display, loudspeaker, CD drive.

As shown in Figure 2, microcontroller can be controlled display, CD drive.

Control panel is made up of microcontroller PIC16C74, random access memory, peripheral circuit.An ide interface is arranged on the control panel, be used for controlling the operation of CD drive.

Principle of work is: after system powered on, the program of microcontroller inside was started working, and it at first resets display, CD drive etc., made it enter ready state.Begin repeatedly to read CD drive then, whether have CD to be placed in the carriage of CD drive to detect.

The form of CD can be audio format, data layout or voice data mixed format.When adopting mixed format, the track of audio format (TRACK) record script information and audio-frequency information, the track of data layout is according to the form of ISO9660, its effect is to provide playing program for PC (PC) user, so that PC user also can be used the CD synchronous playing picture and text of this form, and need not record playing program on another Zhang Guangpan.

If finding has CD to put into, just read the TOC of CD, judge whether each track is that audio format is if whether in track have script control information, if do not have, just think a common music disc if just detecting, then begin to carry out disc and play subroutine; If have, just read script control data piece.

Script control coding is made up of controll block, comprises in the controll block: the 1. address of the beginning of a section audio bitstream and termination; 2. operating environment information, promptly to the process information of key-press event, processing content comprise operations such as demonstration, broadcast, detection, timing; 3. wait graph text information to be shown.Include the pointer that points to other controll block in the controll block, thereby form a reticulate texture or chain structure; The form of controll block can be as follows:

1) length of controll block is unit with the byte;

2) address of next controll block;

3) address of a last controll block;

4) address of the beginning of audio frequency bitstream and termination;

5) pictograph information (existing) in character library mask mode.

Program is after reading the fast information of control, and according to the guiding of controll block, audio plays is delivered to graph text information on the display simultaneously and shown.After a section audio plays, read next controll block, repeat said process again.

If find it is the disc tracks of data layout, just read the LBA address and be the content of a sector of 16.According to the description of the standard ISO 9660 of ISO (International Standards Organization), the data in the CD are organized in the mode of file, catalogue.Should with in have only a catalogue, be exactly the root directory of CD; The number of file in the catalogue is exactly the number of program.The suffix of script control documents is " .scp ".

Data in the file are arranged according to script control format.

Script control coding is made up of controll block, comprises in the controll block: the 1. address of the beginning of a section audio bitstream and termination; 2. operating environment information, promptly to the process information of key-press event, processing content comprise operations such as demonstration, broadcast, detection, timing; 3. wait graph text information to be shown.Include the pointer that points to other controll block in the controll block, thereby form a reticulate texture or chain structure; Data block encodes store data according to the WAV form of standard or other; The form of controll block can be as follows:

1) length of piece is unit with the byte;

2) address of next controll block;

3) address of a last controll block;

4) address of the beginning of audio frequency bitstream and termination;

5) Word message; Program at first reads a controll block after opening a file, according to the guiding of controll block, and the audio plays bitstream, the while is delivered to Word message on the display and shows.

After this section audio data code flow played, program read next controll block, repeated said process again.

The process flow diagram of program is seen accompanying drawing 5;

For audio plays, need to use digital analog converter DAC, model is AD7545; Data flow diagram is seen accompanying drawing 2.

Information on the CD is with the format record of the optical file of standard.The acoustic information that writes down on the CD is delivered to audio system and is sounded after being read out by microcontroller, and simultaneously, the captions that write down on the CD are sent to display and show.

Display apparatus module has comprised the Chinese and English character library, and like this, microcontroller only need be delivered to display to the coding of captions, just can correctly demonstrate Chinese and English.Certainly, as previously mentioned, can adopt the formed word module information in the controll block to show captions.Display module has comprised television signal generator, therefore can receive on the TV to show.

The front end of audio system is a D-A converting circuit chip, amplifies the rear drive loudspeaker through operational amplifier and sounds.

Claims (1)

1. This equipment adopts special CD as information carrier, form by CD drive, display and controller, perhaps adopt laser disc walkman (being DISCMAN), control with microcontroller and software, synchronously play sound and picture and text, its objective is to help the contrast of user, better learning knowledge technical ability and provide a kind of sound picture and text arrangement for reading for the reader by the sense of hearing and vision; In addition, because the working method of CD is that shaven head moves in the plane with reading of data, this just makes operations such as search location, time-out quicker and easy than audio tape; It is characterized in that,

   1) the CD above-noted adopt the acoustic coding and the graph text information of synchronize script control technology.Script control coding is made up of controll block, comprises in the controll block: the 1. address of the beginning of a section audio bitstream and termination; 2. operating environment information, promptly to the process information of key-press event, processing content comprise operations such as demonstration, broadcast, detection, timing; 3. wait pictograph information to be shown.Also include the pointer that points to other controll block in the controll block, thereby form a reticulate texture or chain data structure; Operating environment information is made up of " incident-action schedule ", that is, be the relation of mapping between the action of incident and processing.Like this, at edit script with when programming CD, can determine freely how which incident should be handled.This technology can realize based on DISCMAN;

   2) comprised the literal small library in the script control information claim 1), comprise the needed all literal of this CD-ROM Title and the mask of icon, hardware need not comprise hard character library like this, can save cost, simultaneously, also can comprise formed word module information in the script controll block, program can be drawn literal according to the pointwise on screen of type matrix sign indicating number, and icon also can be preserved with the form of type matrix;

   3) the script control information claim 1) has comprised symbol sebolic addressing, and this equipment is finished operations such as reading dish, demonstration, broadcast, detection under the guide of symbol sebolic addressing, and the operation of handling all kinds of incidents such as button;

   G.723 or the coding of other compressed formats 4) sound coding mode of indication is not limit in script claim 1) the control coding techniques, can be the not compressed various sampling rates and the PCM sign indicating number of sampling precision, can be MP3, MP5, yet;

   5) under the effect of synchronically controlling information, this equipment can synchronously play sound and show picture and text, and carries out operations such as front and back search, time-out, playback, these all by program according to script control information control;

   A kind of form of this control information 6) claim 1) is: mixed special data record format on the special CD, it has write down script control coding, under its effect, this CD both can be play speech on common compact disc player, also can on this equipment, synchronously play speech and demonstrate corresponding spoken and written languages or figure, the script control information is inserted in the common sound track, can only be by this recognition of devices;

   7) this device increases the software formation by the laser disc walkman (DISCMAN) that has flat-panel monitor, adopt special CD as information carrier, above-noted be to contain synchronous sound and literal code sequence, these orders can be by this recognition of devices, thereby, playing speech simultaneously, can on display, synchronously demonstrate corresponding spoken and written languages or figure, can optionally search for again, operation such as time-out;

   8) the display part can be LCD, computer monitor, common TV, plasm TV etc., therefore the invention is not restricted to portable equipment;

   9) CD claim 1) can be used data, audio mix mode record, wherein, audio track is used for writing down script control code and audio-frequency information, and data-track exists with the form of IS09660, can be used to record: the 1. playing program that uses in the PC (PC), so that PC user also can be used the CD synchronous playing picture and text of this form easily, and need not playing program be recorded on another Zhang Guangpan; 2. data-track also can write down script control code and audio-frequency information;

   10) the netted data structure claim 1) can be arranged on CD in order according to a main chain, so just can avoid laser head to change track continually and cause the discontinuous of broadcast.

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