CN1691045A - Voice playing device - Google Patents

Voice playing device Download PDF

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Publication number
CN1691045A
CN1691045A CN 200410027149 CN200410027149A CN1691045A CN 1691045 A CN1691045 A CN 1691045A CN 200410027149 CN200410027149 CN 200410027149 CN 200410027149 A CN200410027149 A CN 200410027149A CN 1691045 A CN1691045 A CN 1691045A
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China
Prior art keywords
data
playing device
voice playing
unit
interface
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Granted
Application number
CN 200410027149
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Chinese (zh)
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CN100424713C (en
Inventor
邓国顺
于德伟
黄光明
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Netac Technology Co Ltd
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LANGKE SCIENCE AND TECHNOLOGY Co Ltd SHENZHEN CITY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by LANGKE SCIENCE AND TECHNOLOGY Co Ltd SHENZHEN CITY filed Critical LANGKE SCIENCE AND TECHNOLOGY Co Ltd SHENZHEN CITY
Priority to CNB2004100271495A priority Critical patent/CN100424713C/en
Publication of CN1691045A publication Critical patent/CN1691045A/en
Priority to HK06105039.6A priority patent/HK1085035A1/en
Application granted granted Critical
Publication of CN100424713C publication Critical patent/CN100424713C/en
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Abstract

The present invention relates to vehicle-carrying audio play device and comprises mainly MPU, decode unit and data access unit both with data connection to MPU, and audio output unit connected to MPU through decode unit, which is characterized in that data access unit is storage card reader to read data from storage card and transmit to MPU for data process. Compared with existing device, the device of this invention reads audio data in storage card by way of setting card reader, increases convenience to data carry of audio play device; the storage card can store audio data as individual taste, and increases user convenience to select data.

Description

Voice playing device
Technical field
The invention relates to a kind of voice playing device, particularly about a kind of voice playing device of using in the vehicles such as automobile of being applied to.
Background technology
Because vehicle-mounted audiovisual offsets except that automobile driver journey and diverts oneself and played positive effect, is subjected to numerous drivers' welcome deeply, so all dispose vehicle-mounted audio-visual apparatus on most of automobile.Current, the vehicle-mounted audio-visual apparatus in the automobile generally comprises systems such as magnetic tape station, CD player and DVD, and wherein magnetic tape station uses early, in general automobiles, use more, because the data capacity of the storage of magnetic tape station is less, and the effect of tonequality is bad, the trend of being eliminated by consumers in general; The audiovisual audio that CD player and DVD player are play is preferable, liked by consumers in general, use extensively, but CD player and DVD player also have many weak points, one, no matter be that the CD or the data of its storage of DVD can not be inserted and removed, and the memory capacity of individual video disc is limited, can not satisfy the needs of high capacity storage, they are two years old, no matter CD player or DVD player, because of the vibration that the enforcement of automobile produces, what be directed at data reads the generation mistake.
In recent years rise CF, MMC, SD, semiconductor mediums such as FLASH are as the carrier of audio frequency, and such semiconductor storage medium is big except the capacity with storage, outside the access safety, also has advantages such as vibration resistance is strong, are particluarly suitable for mobile occasion uses such as automobile.Yet the speech player of conventional semiconductor storage medium except that the MP3 player, generally all needs card reader, could realize playing but also will be connected with data handling system such as computer.This does not have the family of computer for some, just can only hope card heave a sigh.Therefore, design a kind of language play back system that is provided with card reader, as long as will there be the various cards of voice data, insert this device as CF, MMC, SD, MS etc., can directly speech play be come out, this obviously brings great convenience for daily life, is particularly suitable for being used in the playing device in the automobile.
In addition, present semiconductor memory technologies is quite ripe, has multiple storage card available.Therefore, design a kind of speech player that reads memory card function that has, offer convenience for the speech play in the car.
Summary of the invention
The object of the present invention is to provide a kind of vehicle-mounted voice playing device that reads memory card function that has.
For above-mentioned purpose, the invention provides a kind of vehicle-mounted voice playing device, mainly comprise microprocessor, decoding unit, data-reading unit and voice-output unit, described data-reading unit is set up data with microprocessor respectively with decoding unit and is connected, described voice-output unit connects microprocessing unit through decoding unit, it is characterized in that, described data-reading unit is a memory card reader, reading of data from storage card transmits microprocessor and carries out data processing.
Vehicle-mounted voice playing device with respect to prior art, vehicle-mounted voice playing device of the present invention reads voice data in the storage card by the mode that card reader is set, improved the facility of voice playing device data carry, and storage card can be according to individual's hobby voice data, the facility that the user data of raising is selected.
Description of drawings
Fig. 1 is the functional structure chart of voice playing device of the present invention;
Fig. 2 is a voice playing device workflow diagram of the present invention;
Fig. 3 is the functional structure chart of voice playing device second embodiment of the present invention.
Embodiment
Voice playing device of the present invention reads voice data in the storage card by card reader interface is set, and carries out speech play, is fit to be used in the occasion that automobile etc. moves.
See also Fig. 1, the functional structure of voice playing device of the present invention comprises card reading unit 10, microprocessor 100, decoding unit 20, operating unit 30, display unit 40 and voice-output unit 50.Described card reading unit 10, decoding unit 20, operating unit 30, display unit 40 connect microprocessor 100 respectively, accept the coordination and the control of microprocessor 100, carry out the processing of speech data, described voice-output unit 50 is set up through decoding unit 20 and is connected with the data of microprocessor 100, and the voice signal that decoding unit 20 transmits is exported processing.
Described card reading unit 10 is made of memory card socket 12, interface controller 14 and buffer 16, and the data that card reading unit 10 reads from storage card are sent to microprocessor 100 through interface controller 14 and buffer respectively, carry out the processing of data.Described memory card socket 12 provides external memory card to insert, and reads voice data under the control of microcontroller 100 from storage card, and transmits interface controller 14.Transmit between the voice data of the storage card that described interface controller 14 coordinate storage card plugs 12 read and the microprocessor 100, discern different card type memories, and the data layout of storage card is changed, to adapt to the requirement of microprocessor 100.Described buffer 16 provides the card reading unit 40 buffer-stored place that reading of data transmits microprocessor 100 from storage card, with cooperating of the speed that adapts to card reading unit 10 reading of data from storage card and microprocessor 100 deal with data speed, improve the stationarity of data transmission.The storage medium of described buffer 16 can be Flash, or SRAM.
The type of described memory card socket 12 can be selected for use as multimedia card (MultiMediaCard, MMC), compact flash (CompactFlash, CF), small intelligent medium memory card (SmartFlash), safe digital card (Secure Digital Card, SC) and memory stick (Memory Stick) or XD card (Extreme-Digital-Card) etc., the memory card socket of also optional apparatus All-in-One function.
Microprocessor 100 is centers of voice playing device data processing, and it receives the operational order of outside input, according to command request control and the operation of coordinating other each unit in the voice playing device.In voice playing device of the present invention, the function of described microprocessor 100 comprises: the command signal of the input of operation response unit 30, functions such as realizing electric power starting and close, play, time-out, volume, sound channel are chosen; Thereby the interface standard of compatible different storing card is handled different storage cards and the data transmission between the demoder.Be provided with a deposit receipt unit (figure does not show) in the microprocessor 100, deposit needed firmware of microprocessor work and software.And be provided with buffer cell, and data are cushioned in the data transmission that storage is situated between between card and the demoder, used storage medium can be MRAM, DRAM, EEPROM, SRAM, SDRAM and FRAM.
The voice data of 20 pairs of microprocessors of decoding unit, 100 outputs is decoded, and to transmit voice-output unit 50 outputs, described decoding unit 20 comprises demoder 22, digital filter 24, digital to analog converter 26, analogue amplifier 28 successively.
Demoder 20 is used for the voice data of microprocessor 100 outputs is decoded, and comprises the decompress(ion) of compressing data form, and its effect is come out these audio information from the data stream of serial exactly, handles for next step and uses.In the present embodiment, demoder is selected the CS8412-KP chip of Crystal for use.
Digital filter 24 is to utilize finite impulse response (FIR) technology (Finite Impulse Responsetechnique) to carry out interpolation processing, promptly inserts some by the virtual sampled point that calculates between real audio sample point.This method is called " oversampling ", and its benefit is that the frequency spectrum of the quantizing noise that produces in the digital-to-analog conversion process is moved to front end, away from the frequency band of people's ear audible, is convenient to thorough burbling noise, improves machine-noise ratio.The digital filter chip adopts the 5843A of NEC in the implementation of present embodiment.
Digital to analog converter (DAC) the 26th is changed the voice data of digital filter 24 outputs, reads in digital signal data, by this digital value is calculated, converts thereof into correspondent voltage value or current value.The method of existing realization digital-to-analog conversion has two kinds, and a kind of is the staged digital-to-analog conversion, claims the conversion of multi-bit mould again, and another kind is bit stream technology or single-bit technology.In the present embodiment, adopt multi-bit mould conversion regime, adopting model is the PCM63P-K digital to analog converter of Burr-Brown.
Analogue amplifier 28 is the voltage signals that take out bit stream DAC chip, or converts the current signal of staged DAC to voltage signal, and produces certain gain and buffer action.Convert voltage signal to by current signal in the present embodiment and export voice playing device to staged DAC.
Instantaneous speech power 50 provides the voice output of voice playing device of the present invention, can select earphone, loudspeaker for use, and modes such as audio amplifier are being by the voice output interface to voice playing device of the present invention, and the audio amplifier built-in with automobile is connected, and carries out the broadcast of voice.
Operating unit 30 connects microprocessor 100, provide the user to import data manipulation to voice playing device, the key panel of described operating unit 30 (figure does not show) is provided with a plurality of function buttons, to finish the multiple feature operation control of voice playing device of the present invention, in the present embodiment, key panel is provided with and wakes key (ON) up, sleep key (OFF), play button (PLAY), Pause key (STILL) and stop key basic usual function keys such as (STOP), on the operator pushes button panel during a certain function key, microprocessor 100 is received corresponding instruction, produce relative processing signals, control the operation of each unit.
Display unit 40 connects microprocessor 100, and the demonstration of the broadcast state of voice playing device is provided, and the display element of described display unit 40 can be LCD MODULE (LCD), LED or pilot lamp.
Below the flow process that reads storage card of voice playing device of the present invention is described:
Please join Fig. 2, when storage card inserts memory card socket 12, microprocessor 100 at first can detection of stored card useful signal (CD signal, the card useful signal that all is provided with on the various cards), if do not detect effective CD signal or do not detect the CD signal, then demonstration makes mistakes or points out insertion storage card or storage card not to insert, if microprocessor 100 detects effective CD signal, then further judge the type of storage card by ergodic algorithm, after the type of judging the storage card that inserts memory card socket, microprocessor 100 calls corresponding handling procedure (because the agreement of being followed of dissimilar storage cards is inequality), after calling correct handling procedure, then enter the preparation of the operation of data read, accept user's operational order, carry out corresponding data read, if read-write operation runs into fault, as microprocessor 100 in reading the data procedures of storage card, it is wrong to detect this packet, as parity error, CRC check mistakes etc., then microprocessor 100 calls corresponding damage assessment routine (DAR) and handles.If fault handling is failed then finished read data operation, this operation is unsuccessful.If the fault handling success, microprocessor 100 carries out desired communication with the storage card that inserts memory card socket, and foundation is done further to communicate by letter with decoding unit 20.
Further combined with operational order, voice playing device of the present invention is elaborated below:
Operating unit 30 is accepted user's input operation instruction, a certain function key on the panel promptly pushes button, be that example describes now with play button (PLAY), after in memory card socket 12, inserting storage card, when the operator pressed play button (PLAY), operating unit 30 transferred to microprocessor 100 with this operational order.Microprocessor 100 is carried out this instruction after receiving the play instruction that operating unit 30 sends, and reads voice data in the storage card by memory card socket, simultaneously the state of carrying out is passed through display interface 40 notifying operation persons.After sound signal is sent to microprocessor 100 from storage card, decode by 22 pairs of these data of demoder, and transmit digital filter 24 and carry out Filtering Processing, improve signal to noise ratio (S/N ratio); Data after Filtering Processing are sent into the conversion that the data weighted-voltage D/A converter carries out digital signal and simulating signal again; Simulating signal after conversion carries out processing and amplifying by analogue amplifier after voice-output unit output.Wherein data-signal can be used the IIS bus transfer by microprocessor to decoding unit and in the internal transmission of decoding unit, and command signal can be transmitted with iic bus.
Understandable, on the operating unit 30 of voice playing device of the present invention other function key can also be arranged, as fast forward button, rewind key, return key etc., the process of the execution of each function key of microprocessor and the course of work of play button are basic identical, are not do to give unnecessary details.
For better adapting to from external memory, voice playing device of the present invention imports the data needs, further improvement to voice playing device of the present invention is on the basis of aforesaid voice playing device, by the external bus interface unit is set, as usb interface unit, provide external memory, as the needs of data such as notebook, mobile PC, portable hard drive input.
See also Fig. 3, further comprise an interface unit 60 and a storer 70 through improved voice playing device, described interface unit 60 and storage unit 70 are set up bi-directional data with microprocessor 100 respectively and are connected.
Interface unit 60 includes but not limited to USB interface, IEEE1394 interface, RS232 interface, parallel interface, blue tooth interface, infrared ray connects and 802.11 interfaces, in the present embodiment, described interface unit 60 adopts USB interface, see also Fig. 3, described interface unit 60 further comprise USB socket 62, serial interface engine 60 (Serial Interface Engine, SIE) and fifo buffer memory 66.
The described USB of comprising socket 62 provides external memory to be connected physical interface with voice playing device of the present invention.
Described serial interface engine 64 is that usb interface unit 64 most important hardware one of are formed, this serial interface engine 64 mainly is made up of four parts: be used for finishing the NRZI coding/decoding on the hardware and add/go that filler operates, the part of NRZI/Bit Buffing and NRZO/Bit Unstuffing; Produce the CRC check sign indicating number of data on the hardware and packet is carried out the CRC Check﹠amp of CRC check; The Generator part; Be used for parallel data is changed into the parallel/serial conversion portion (Packet Encode) of USB serial data, the usb data bag that main frame is sent changes into the serial/parallel conversion portion (PacketDecode) of discernible parallel data; And detect and generation SOP (synchronization field of each packet) and eop signal part.
Described fifo buffer memory 66 is bridges that interface unit 60 is connected with microprocessor 100, described fifo buffer memory 66 provides external memory input or voice distribution device by the buffering of usb interface unit 60 to external data output, guarantees that data do not have the packing and the transmission of losing ground.
Storer 70 is that voice playing device is changed data storage " warehouse ", in in voice playing device, establish a storer 70, described speech data can increase the function of speech play dress pavilion data backup by storage card through card reading unit 10 or usb interface unit input store 70.The storage medium of described storer 70 comprises MRAM, DRAM, EEPROM, SRAM, SDRAM and FRAM, adopts the storage medium of Flash as storer 70 in the present embodiment.
Thus, by setting up interface unit 60 and storer 70, effectively expanded the ability of voice playing device picked-up speech data, speech data can be play by passing through interface unit 60 input stores 70 as notebook, portable hard drive and other voice memory storage.
To the description of the structure of voice playing device of the present invention only for realizing an embodiment of the present invention's conception; understanding to the present invention's conception is not limited only to above-described embodiment; the improvements and modifications of doing based on the inventive concept of voice playing device of the present invention: the function that comprises integrated interface controller 14 and buffer 16 is in microprocessor 100; or on hardware integrated demoder 22; digital filter 24; D/A converter 26 and analog signal amplifier 28 are integrated in a chip in one chip or part; or the mode by software realizes the decoding to speech data; or increase the input mode of other voice data: tape; disc accessing; realize multi-functional voice playing device; or the function of increase recording etc.; and; based on the mode that reads speech data; by reading the video data in the storage card; carry out video playback in automobile, these functions of being done based on the present invention's design increase or function combinations all should not be considered as breaking away from the protection domain that the present invention is conceived.

Claims (8)

1. vehicle-mounted voice playing device, mainly comprise microprocessor, decoding unit, data-reading unit and voice-output unit, described data-reading unit is set up data with microprocessor respectively with decoding unit and is connected, described voice-output unit connects microprocessing unit through decoding unit, it is characterized in that, described data-reading unit is a memory card reader, and reading of data from storage card transmits microprocessor and carries out data processing.
2. voice playing device as claimed in claim 1 is characterized in that: described decoding unit further comprises demoder, digital filter, digital to analog converter and signal amplifier.
3. voice playing device as claimed in claim 1, it is characterized in that: described data-reading unit further comprises a memory card socket, and described memory card socket is in order to insert multimedia card, compact flash, small intelligent medium memory card, safe digital card, memory stick and/or XD card etc.
4. voice playing device as claimed in claim 1 is characterized in that: described voice playing device further comprises the interface unit of external data input.
5. voice playing device as claimed in claim 1 is characterized in that: described interface unit comprises USB interface, IEEE1394 interface, RS232 interface, parallel interface, blue tooth interface, infrared ray connects and/or 802.11 interfaces.
6. as claim 1 or 4 described voice playing device, it is characterized in that: described voice playing device further comprises a storer, and this storer connects microprocessor.
7. voice playing device as claimed in claim 6 is characterized in that: the storage medium of described storer comprises MRAM, DRAM, EEPROM, SRAM, SDRAM or FRAM.
8. voice playing device as claimed in claim 1 is characterized in that: described voice playing device comprises display unit.
CNB2004100271495A 2004-04-29 2004-04-29 Voice playing device Expired - Lifetime CN100424713C (en)

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CNB2004100271495A CN100424713C (en) 2004-04-29 2004-04-29 Voice playing device
HK06105039.6A HK1085035A1 (en) 2004-04-29 2006-04-27 Voice playing device

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Application Number Priority Date Filing Date Title
CNB2004100271495A CN100424713C (en) 2004-04-29 2004-04-29 Voice playing device

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CN100424713C CN100424713C (en) 2008-10-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102749093A (en) * 2011-04-19 2012-10-24 山东建筑大学 Audio reading device of digital display caliper
CN103188316A (en) * 2011-12-30 2013-07-03 上海博泰悦臻电子设备制造有限公司 Vehicle-mounted end, and realization system, adaptive device and starting method of vehicle-mounted voice broadcast

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19940905A1 (en) * 1999-08-27 2001-04-12 Becker Gmbh Sound reproduction and recording device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102749093A (en) * 2011-04-19 2012-10-24 山东建筑大学 Audio reading device of digital display caliper
CN103188316A (en) * 2011-12-30 2013-07-03 上海博泰悦臻电子设备制造有限公司 Vehicle-mounted end, and realization system, adaptive device and starting method of vehicle-mounted voice broadcast
CN103188316B (en) * 2011-12-30 2018-10-02 上海博泰悦臻电子设备制造有限公司 Vehicle-mounted end, realization system, adaptive device and the startup method that vehicle-mounted voice is reported

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CN100424713C (en) 2008-10-08
HK1085035A1 (en) 2006-08-11

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