CN202145381U - Record and playback device used in vehicle-mounted sound and miniature player - Google Patents
Record and playback device used in vehicle-mounted sound and miniature player Download PDFInfo
- Publication number
- CN202145381U CN202145381U CN201120201885U CN201120201885U CN202145381U CN 202145381 U CN202145381 U CN 202145381U CN 201120201885 U CN201120201885 U CN 201120201885U CN 201120201885 U CN201120201885 U CN 201120201885U CN 202145381 U CN202145381 U CN 202145381U
- Authority
- CN
- China
- Prior art keywords
- system bus
- digital
- processor core
- vehicle
- analog
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The utility model relates to a record and playback device used in a vehicle-mounted sound and a miniature player, which comprises a processor core on an integrated circuit, wherein, the processor core is connected with a read-only memory and a random access memory, as well as a system bus which is connected with a digital/ analog conversion module and an analog/digital conversion module; a DMA (Direct Memory Access) controller is connected with the system bus through a main wire port of the DMA controller; the output end of the digital/ analog conversion module is connected with a power amplifier; and the system bus is further connected with a universal data interface for connecting storage medium. The record and playback device has the advantages that the radio contents, sounds of people or external input audio of the vehicle-mounted sound and the miniature sound can be recorded and stored in a USB flash disk or an SD/MMC (Secure Digital/Multi Media Card), and meanwhile, the recorded audio file can be managed and played back; and the cost and the power consumption are reduced and the service life is prolonged.
Description
Technical field
The utility model relates to a kind of recording and playback reproducer, is applied in vehicle audio and the mini audio.
Background technology
At present popular vehicle audio and mini audio often all has radio function, in broadcast listening, tends to produce the demand of contents such as news in will broadcasting, music under recording.Can adopt tape to record in early days, but defective is a record length weak point and stable inadequately, the while, this method was infeasible owing to tape progressively is eliminated.
Along with the development of USB flash disk, SD/MMC card technique, can adopt the store audio content, therefore can the radio content in vehicle-mounted and the mini audio be recorded in USB flash disk and the SD/MMC card with digital form.Simultaneously, the development along with technology such as Digital Audio Compression Technology, digital-to-analogue conversion can convert simulated audio signal into can be stored on USB flash disk and the SD/MMC card digital file format, and can also accomplish the playback to recording file.
Summary of the invention
The purpose of the utility model provides a kind of recording and playback reproducer; Can be saved in USB flash disk or the SD/MMC card with radio content, voice or outside input audio recording in vehicle audio, the mini audio and with digital form, also can manage the audio file that also playback records simultaneously.
According to the technical scheme that the utility model provides, said recording and the playback reproducer that is applied to vehicle audio and mini player comprises the processor core on the integrated circuit, and said processor core is connected with ROM (read-only memory) and random access memory; Said processor core is connected with system bus; System bus is connected with numeral and analog-to-digital converting module; Dma controller is connected with said system bus through the bus master port of self, and the output of said numeral connects power amplifier; Also be connected with universal data interface on the said system bus and be used to connect storage medium.
Also the audio coding decoding module be can be connected with on the said system bus, digital audio compression format encoded and decoding carried out.Said processor core adopts CPU or DSP nuclear, accomplishes system control function, and when not containing the audio coding decoding module, CPU or DSP nuclear have the function of said audio coding decoding module concurrently.
Said universal data interface comprise SD/MMC memory card interface, USB principal and subordinate control interface wherein partly or entirely.
The recording of the utility model partly need comprise said analog-to-digital converting module (ADC), USB principal and subordinate control interface, SD/MMC memory card interface; Playback section comprises numeral (DAC), power amplifier.
Above-mentioned all modules can be integrated on a slice integrated circuit, perhaps are divided into several integrated circuit and realize.
The utility model has the advantages that: can be saved in USB flash disk or the SD/MMC card with radio content, voice or outside input audio recording in vehicle audio, the mini audio and with digital form, also can manage the audio file that also playback records simultaneously; Aspect cost, decrease, and the power consumption reduction makes the life-span prolong.
Description of drawings
Fig. 1 is the utility model circuit structure block diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
As shown in Figure 1, the application chip of the utility model is embedded with CPU/DSP nuclear, random access memory ram and read only memory ROM, dma controller, audio coding decoding, USB principal and subordinate control interface (USB OTG interface), Delta-Sigma numeral, Delta-Sigma analog-to-digital converting module, SD/MMC memory card interface etc.
CPU/DSP nuclear connects ROM (read-only memory) and random access memory; CPU/DSP nuclear is connected with system bus; Dma controller is connected with system bus through the bus master port of self; System bus is connected with analog-to-digital converting module with numeral, and the output of said numeral connects power amplifier (power amplification circuit); Also be connected with universal data interface on the said system bus, said universal data interface comprises SD/MMC memory card interface, USB principal and subordinate control interface.
Said CPU/DSP nuclear carries out file/flow data to be handled, and also controls button simultaneously, and display screen and storer etc. are so all programs all operate in internal processes space and the internal data space.Also can be connected with independent audio coding decoding module on the system bus, the digital audio compression format encoded can be accomplished by CPU/DSP nuclear or audio coding decoding module with decoding.
Dma controller conducts interviews to storer in the system and register through its high performance bus master port (Master Interface).The program and the data-carrier store that comprise CPU/DSP.
The effect of random access memory ram, read only memory ROM is the program and the data-carrier store of inside solidification
USB principal and subordinate control interface comprises interconnective USB controller and USB transceiver.The USB controller designs for pure digi-tal, and it is bearing data-transformation facility and control function between system and the USB PHY (Physical layer).The USB transceiver is the circuit that digital-to-analogue is mixed, and its effect is string and conversion and a completion USB PHY thereof of accomplishing the transmission data.
Delta-Sigma digital-to-analog conversion (DAC) converts digital signal into simulating signal, and Delta-Sigma analog/digital conversion (ADC) is a digital signal with analog signal conversion.
The SD/MMC interface is used to read and write outside SD/MMC card.
Use described recording of the utility model and playback reproducer to realize that flow process vehicle-mounted or mini audio recording and playback is following:
One, Recording Process:
(1) after electric power system powered on, system carried out initialization operation;
(2) all circuit module duties are put in the CPU/DSP caryogamy;
(3) in the machine system radio chip or module in normal operation, during demand, CPU/DSP nuclear starts analog-to-digital converting module work as recording, sampling external analog sound signal is a digital signal;
(4) CPU/DSP nuclear starts dma controller and reads the internal random memory RAM to data from analog/digital conversion ADC, carries out digital audio compression in CPU/DSP nuclear or the audio coding decoding module and decodes reading the data in the storer at last;
(5) decoded data are delivered in SD/MMC or the USB controller through the external bus bridge, write SD/MMC card or USB flash disk through controller;
Two, replayed section:
(1) after electric power system powered on, system carried out initialization operation;
(2) CPU/DSP nuclear drives USB controller or SD controller scanning USB transceiver or SD/MMC interface, detects whether there is the recorded audio file;
(3) if there is not the recorded audio file, then CPU/DSP nuclear driving display interface shows the information that does not have file to play on display screen, and repeating step (2);
(4) if there is audio file; At first CPU/DSP nuclear reads corresponding file and gets into analog/digital conversion; Secondly dma controller is read the internal random memory RAM to data from analog/digital conversion ADC; Reading the data in the storer in CPU/DSP nuclear or the audio coding decoding module, realize the decoding of voice data at last;
(5) decoded data are delivered among the numeral DAC through the external bus bridge;
(6) signal that comes out of numeral DAC plays back through power amplifier and loudspeaker;
The utility model has adopted Delta-Sigma ADC/DAC to carry out analog/digital and digital-to-analog conversion, utilizes high s/n ratio to guarantee the high-quality of recording and playback; Can adopt popular digital audio compression form as the recording storage format, for example: PCM, ADPCM, MP3, WMA etc.
Claims (4)
1. be applied to the recording and the playback reproducer of vehicle audio and mini player, it is characterized in that: comprise the processor core on the integrated circuit, said processor core is connected with ROM (read-only memory) and random access memory; Said processor core is connected with system bus; System bus is connected with numeral and analog-to-digital converting module; Dma controller is connected with said system bus through the bus master port of self, and the output of said numeral connects power amplifier; Also be connected with universal data interface on the said system bus and be used to connect storage medium.
2. record according to claim 1 and playback reproducer, it is characterized in that said processor core adopts CPU or DSP nuclear.
3. record according to claim 1 and playback reproducer, it is characterized in that also being connected with on the said system bus audio coding decoding module.
4. recording and playback reproducer according to claim 1, it is characterized in that said universal data interface comprise SD/MMC memory card interface, USB principal and subordinate control interface wherein partly or entirely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120201885U CN202145381U (en) | 2011-06-16 | 2011-06-16 | Record and playback device used in vehicle-mounted sound and miniature player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120201885U CN202145381U (en) | 2011-06-16 | 2011-06-16 | Record and playback device used in vehicle-mounted sound and miniature player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202145381U true CN202145381U (en) | 2012-02-15 |
Family
ID=45581311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120201885U Expired - Lifetime CN202145381U (en) | 2011-06-16 | 2011-06-16 | Record and playback device used in vehicle-mounted sound and miniature player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202145381U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531224A (en) * | 2013-09-30 | 2014-01-22 | 光一科技股份有限公司 | Simple voice playing method applied in embedded system platform |
| CN106803426A (en) * | 2016-12-07 | 2017-06-06 | 广州视源电子科技股份有限公司 | Audio files storage method and system |
| CN110619898A (en) * | 2019-09-18 | 2019-12-27 | 陈伟 | Sound recording implementation method and system |
-
2011
- 2011-06-16 CN CN201120201885U patent/CN202145381U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531224A (en) * | 2013-09-30 | 2014-01-22 | 光一科技股份有限公司 | Simple voice playing method applied in embedded system platform |
| CN103531224B (en) * | 2013-09-30 | 2016-03-09 | 光一科技股份有限公司 | Be applied to the simple and easy speech playing method of embedded system platform |
| CN106803426A (en) * | 2016-12-07 | 2017-06-06 | 广州视源电子科技股份有限公司 | Audio files storage method and system |
| WO2018103420A1 (en) * | 2016-12-07 | 2018-06-14 | 广州视源电子科技股份有限公司 | Method and system for storing audio file |
| CN110619898A (en) * | 2019-09-18 | 2019-12-27 | 陈伟 | Sound recording implementation method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0851423A1 (en) | Audio player and recorder employing semiconductor memory as a recording medium | |
| CN101958139A (en) | High definition lossless audio playing (HDAP) system | |
| CN202145381U (en) | Record and playback device used in vehicle-mounted sound and miniature player | |
| CN104581522A (en) | High definition lossless audio playing system (HDAP) | |
| CN201134257Y (en) | On-vehicle DVD system | |
| CN103531224B (en) | Be applied to the simple and easy speech playing method of embedded system platform | |
| CN201532773U (en) | Player used for vehicle-mounted acoustics or mini acoustics | |
| CN200947646Y (en) | Vehicle-mounted multifunctional video player | |
| CN113327345A (en) | Railway locomotive communication equipment recording device and data storage method thereof | |
| CN1897110A (en) | High-quality audio-frequency signal coverting playback device with solid memory as media | |
| CN2418520Y (en) | Portable digital music-player | |
| CN1452056A (en) | MP3 playback machine | |
| CN201199449Y (en) | Vehicle-mounted Chinese display numeral acoustics player | |
| CN216053133U (en) | Railway locomotive communication equipment recording device | |
| CN201446912U (en) | An iPod connection device applied on a vehicle acoustics | |
| CN202258368U (en) | Nondestructive digital audio player based on central processing unit (CPU) platform | |
| US20080282010A1 (en) | Apparatus for digital/analog audio storage and playback | |
| CN102915757A (en) | Lossless digital audio player based on CPU (central processing unit) platform | |
| CN202142291U (en) | CD player possessing magnetic tape transcription function | |
| JP2003007041A (en) | Audio equipment and attachable and detachable panel | |
| CN2631845Y (en) | Shockproof loudspeaker device on vehicle | |
| CN1101030C (en) | Multimedia recording and playing device capable of expanding function | |
| CN102413411B (en) | Portable sound amplifier | |
| KR20140131735A (en) | Method for reproducing high-quality sound source on mini audio set | |
| CN2727906Y (en) | Vehicle mounted MP3 sound equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120215 |
|
| CX01 | Expiry of patent term |