CN2433710Y - Digital audio recorder with radio connecting - Google Patents

Abstract

The utility model relates to a digital audio record-replay machine with radio connection. The utility model is formed from a casing, a panel and a circuit board which are connected, wherein, the side face of the casing is provided with a microphone jack and an earphone jack which are respectively connected with a corresponding circuit on the circuit board by respective signal lines; the panel is provided with a control key group, a loudspeaker and a liquid display screen which are respectively connected with a corresponding circuit on the circuit board by respective signal lines; a circuit of the utility model is composed of amplifying circuits A/D and D/A, a converting circuit, a single chip computer CPU, a wireless transmission interface circuit, a memory unit, a control circuit, a display circuit and an output protective circuit which are respectively connected by respective signal lines. The utility model has the advantages of small size, light weight, flexible and convenient data exchange, convenient communication, portability, and convenient operation.

Description

The digital audio recorder of band wireless connections

The utility model is the full digital code audio recording and reproducing machine of band wireless connections, belongs to culture and entertainment supplies, particularly Digital Audio Compression Technology and Radio Transmission Technology.

Digital audio recorder is the culture and entertainment supplies of a new generation, and MP3 player, full digital interview machine, recording pen etc. all belong to this series products.Present digital audio recorder has adopted up-to-date audio compression techniques and signal processing chip, and advantages such as tonequality is good, the working time is long, durable are arranged.But existing digital audio recorder all has problems in data transmission, in order to preserve or new data more, videocorder always will carry out exchanges data with other machine, existing digital audio recorder all is to be connected with computing machine by cable, this mode exists following defective: (1) uses inconvenient, and cable connects usually unsuitable hot line job, otherwise may cause damage, so majority will shut down earlier and start shooting when using, cause and use inconvenience; (2) carry inconvenience, the volume of the cable-to-cable connector volume than digital audio recorder sometimes is also big, is not easy to carry; (3) can not carry out exchanges data between the different digital videocorder, and be sought after this function during practical application.

The purpose of this utility model is exactly to exist and carry inconvenience, use between inconvenient, the digital videocorder or can not carry out the shortcoming and the problem of exchanges data with the Radio Transmission Technology device in order to overcome and to solve existing digital audio recorder, a kind of exchanges data transmission of research and design need not cable and connects, can carry out exchanges data with a transmitting device that only is embedded into as mobile phone, digital camera, computing machine etc. by several integrated packages, become easy to carry, easy to use, volume is little, the digital audio recorder of lightweight band wireless connections.

The utility model is realized by following technical proposals: contour structures synoptic diagram of the present utility model as shown in Figure 1, its circuit block diagram as shown in Figure 2, its software program flow process block diagram as shown in Figure 3, its interrupt service routine FB(flow block) as shown in Figure 4, its circuit theory diagrams such as Fig. 5～shown in Figure 7; The digital audio recorder of band wireless connections is connected and composed by casing, panel, circuit board, panel is loaded on the casing front, microphone (acoustic pickup) jack 1, earphone jack 2 are equipped with in the casing side, and are connected with amplifying circuit, the respective point of output protection circuit on the self-contained circuit board respectively by voice signal line, audio signal wire respectively; Operating key group 3, loudspeaker 4, LCDs 5 are housed on the panel, and are connected with control circuit, output protection circuit, the respective point of display circuit on the self-contained circuit board respectively by control signal wire, audio signal wire, display signal line respectively; Its circuit is electrically connected jointly by amplifying circuit, A/D change-over circuit, display circuit, D/A change-over circuit, output protection circuit and constitutes, and it interconnects and close singlechip CPU (high-speed digital signal processor), wireless transmission interface circuit, memory cell, control circuit, is: amplifying circuit is electrically connected with microphone, A/D change-over circuit respectively mutually by the voice signal line respectively; Singlechip CPU is electrically connected with A/D change-over circuit, D/A change-over circuit, control circuit, wireless transmission interface circuit, memory cell, display circuit respectively mutually by voice digital signal line, audio digital signals line, control signal wire, wireless transmission interface signal line, storage signal wire, display signal line respectively; The wireless transmission interface circuit is connected with other relevant apparatus by the antenna receiving-sending radiowave; Output protection circuit is electrically connected with D/A change-over circuit, earphone or loudspeaker respectively mutually by audio signal wire respectively; In the circuit theory diagrams of Fig. 5～shown in Figure 7, amplifying circuit is connected and composed by the deposited copper film band of circuit board jointly by amplifier integration member U6, resistance R 10～R17, capacitor C 10～C19; Singlechip CPU is made of high-speed digital signal processor ic chip 4; Output protection circuit is connected and composed by the deposited copper film band of circuit board jointly by resistance R 30～R31, capacitor C 31～C32; A/D, D/A change-over circuit are connected and composed by the deposited copper film band of circuit board jointly by converter integration member IC1, crystal oscillator X1～X2, capacitor C 40～C48; Control circuit is connected and composed by the deposited copper film band or the lead of circuit board jointly by controller integrated package U2, resistance R 20～R24, operating key group S1～S5; The wireless transmission interface circuit is connected and composed by the deposited copper film band or the lead of circuit board jointly by ic chip 6, IC7, crystal oscillator X4, antenna; Memory cell is made of flash memory module I C2; Display circuit is connected and composed by the deposited copper film band or the lead of circuit board jointly by display apparatus module U3, U5.

Style of work principle of the present utility model is as follows: whole digital videocorder is made up of singlechip CPU, memory module, display module, control module, interface circuit.Singlechip CPU in the circuit has sheet internal program storer and the data-carrier store of 16K, and dominant frequency reaches as high as 40MHz, is suitable for doing high speed signal and handles, and it is the reasonable dsp chip of a kind of cost performance.Storage unit is flash memory (FLASHMEMORY); its memory space is 8M * 8bits; high 64Kbytes is used for stored programme and the required code book of program; by hardware programming (program flow chart is seen shown in Figure 3) high 64K is made as protected mode; can only read and can not write, other parts are used to store the speech data of compressed mistake.If adopt present state-of-the-art voice compression technique, the memory space of 8M can be stored and be surpassed 3 hours voice.Control module is made of the operating key group, and display module is realized by SVM12232.The A/D of analog interface, D/A conversion realizes with chip piece, this machine has been selected A/D, the D/A conversion of 16 of two-ways for use, the input format of the form of its digital code stream and selected singlechip CPU serial port is consistent, and they are used and can reach the highest efficient.The data that the wireless transmission interface circuit transmits single-chip microcomputer are encoded and are modulated, and launch by antenna, and the data that antenna is received are carried out the demodulation sign indicating number simultaneously, deliver to single-chip microcomputer, realize the communication between other devices and the single-chip microcomputer.When the utility model powered up, read-in programme was to ram in slice from storer for single-chip microcomputer, and program brings into operation after running through, and system is carried out initialization, enters waiting status then, carries out corresponding action according to the input of control module.The working method of control module is to produce an interruption when button is pressed, (the interrupt service routine FB(flow block) is seen shown in Figure 4) singlechip CPU is read the PF mouth to determine being which button in interrupt service routine, the function of operating key group is respectively: (1) function key: showing when pressing provides various functions: playback, recording, data transmission are arranged by the one-level menu; Entering secondary sub-menu can be provided with the playback starting point and be connected with being provided with; (2) acknowledgement key: determine to select any function; (3) stop key: be returned to tone playing state; (4) fast forward button; (5) rewind down key; (6)+,-key: be used for function selecting, playback, re-reading, with being used to control volume when reading; (corresponding display module driver is arranged in interrupt service routine), content displayed has three: 1. mode of operation: corresponding with button; 2. broadcast/record length shows; 3. battery operating position.

The utility model is compared with existing digital audio recorder, has following advantage and beneficial effect: (1) communicates by letter more convenient, owing to replaced the cable connection with wireless connections, greatly facilitates exchanges data.Simultaneously, the utility model select Radio Transmission Technology--Bluetooth technology has the transfer rate up to 1Mbps in the coverage of 10cm-10m, guaranteed at a high speed effectively transmission; (2) communication is simpler, owing to adopted Embedded radio communication subsystem, therefore before carrying out data transmission any software or hardware need not be installed, and can hot line job; (3) communication is more flexible, and existing digital audio recorder adopts cable to connect, and is a kind of connection of point-to-point, adopts after the wireless connections, can realize a little arriving the connection of multiple spot, and promptly an audio recording and reproducing machine can carry out exchanges data with a plurality of systems simultaneously; (4) good prospects for application, along with development of wireless communication devices, the utility model necessarily can realize and being connected of the Internet that the selection audio resource can surf the web by wireless mode in the near future; (5) the utility model exchanges data is flexible, easy to carry, easy to use, volume is little, in light weight.

Below Figure of description is further specified as follows: Fig. 1 is the contour structures synoptic diagram of the digital audio recorder of band wireless connections; Fig. 2 is its circuit block diagram; Fig. 3 is its software program flow process block diagram; Fig. 4 is its interrupt service routine FB(flow block); Fig. 5～Fig. 7 is its circuit theory diagrams.Among each figure: 1 is microphone (acoustic pickup) jack, and 2 is earphone jack, and 3 is the operating key group, and 4 is loudspeaker (loudspeakers), and 5 is LCDs; Same numeral point in the circuit theory diagrams should be connected together.

Embodiment of the present utility model can be as follows: (1) presses that Fig. 1 is designed, the casing of this digital audio recorder of processing and manufacturing, panel.For example: can adopt the PVC plastics, make casing and panel with the mode of injection moulding or compression moulding; And choose the member that is loaded on casing and the panel, for example microphone jack 1, earphone jack 3 can be selected universal miniature microphone and earphone plug-in unit for use; Loudspeaker 5 can be selected ARWA type loudspeaker for use; LCDs 5 can adopt the supporting LCDs of display module selected on the circuit board; (2) press Fig. 2, Fig. 5～shown in Figure 7, the computing machine wiring is made circuit board (or carrying out the integrated middle and small scale integrated module of making) and is rescreened and select components and parts to install, for example: the ADSP2181 of the optional U.S. of singlechip CPU AD company; The optional LM358 of the U6 of amplifying circuit; The ADSP1847 of the optional U.S. of the IC1 of A/D, D/A change-over circuit AD company, the optional 24.576MHz of crystal oscillator X1, the optional 16.9344MHz of crystal oscillator X2; The optional 74LS11 of control module U2; Wireless transmission interface circuit IC6, IC7 can select the w7020b and the w7400b of Alcatel-Lucent for use; The optional SVM12232 of display module U5; Memory cell IC2 can select the Am29F064B of U.S. AMD for use; (3) map interlinking 3, program circuit block scheme shown in Figure 4 are programmed and are imported or solidify in CPU and memory cell; By shown in Figure 1 the element apparatus of being chosen in panel or casing side, installing and circuit board through simply powering up debugging is installed in the casing, panel is installed with the circuit board respective point with the member on the casing with lead by the described annexation of top instructions then and be connected, just can implement the utility model preferably.

Claims (2)

1, a kind of digital audio recorder with wireless connections, it is characterized in that: it is connected and composed by casing, panel, circuit board, panel is loaded on the casing front, microphone jack (1), earphone jack (2) are equipped with in the casing side, and are connected with amplifying circuit, the respective point of output protection circuit on the self-contained circuit board respectively by voice signal line, audio signal wire respectively; Operating key group (3), loudspeaker (4), LCDs (5) are housed on the panel, and are connected with control circuit, output protection circuit, the respective point of display circuit on the self-contained circuit board respectively by control signal wire, audio signal wire, display signal line respectively; Its circuit is electrically connected jointly by amplifying circuit, A/D change-over circuit, singlechip CPU, wireless transmission interface circuit, memory cell, control circuit, display circuit, D/A change-over circuit, output protection circuit and constitutes, and its interconnected relationship is: amplifying circuit is electrically connected with microphone, A/D change-over circuit respectively mutually by the voice signal line respectively; Singlechip CPU is electrically connected with A/D change-over circuit, D/A change-over circuit, control circuit, wireless transmission interface circuit, memory cell, display circuit respectively mutually by voice digital signal line, audio digital signals line, control signal wire, wireless transmission interface signal line, storage signal wire, display signal line respectively; The wireless transmission interface circuit is connected with other relevant apparatus by the antenna receiving-sending radiowave; Output protection circuit is electrically connected with D/A change-over circuit, earphone or loudspeaker respectively mutually by audio signal wire respectively.

2,, it is characterized in that described amplifying circuit is connected and composed by the deposited copper film band of circuit board jointly by amplifier integration member U6, resistance R 10～R17, capacitor C 10～C19 by the described a kind of digital audio recorder of claim 1 with wireless connections; Singlechip CPU is made of high-speed digital signal processor ic chip 4; Output protection circuit is connected and composed by the deposited copper film band of circuit board jointly by resistance R 30～R31, capacitor C 31～C32; A/D, D/A change-over circuit are connected and composed by the deposited copper film band of circuit board jointly by converter integration member IC1, crystal oscillator X1～X2, capacitor C 40～C48; Control circuit is connected and composed by the deposited copper film band or the lead of circuit board jointly by controller integrated package U2, resistance R 20～R24, operating key group S1～S5; The wireless transmission interface circuit is connected and composed by deposited copper film band or lead on the circuit board jointly by interface circuit ic chip 6, IC7, crystal oscillator X4, antenna; Memory cell is made of flash memory module I C2; Display circuit is connected and composed by deposited copper film band or lead on the circuit board jointly by display apparatus module U3, U5.

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