CN1452056A - MP3 playback machine - Google Patents
MP3 playback machine Download PDFInfo
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- CN1452056A CN1452056A CN 02111406 CN02111406A CN1452056A CN 1452056 A CN1452056 A CN 1452056A CN 02111406 CN02111406 CN 02111406 CN 02111406 A CN02111406 A CN 02111406A CN 1452056 A CN1452056 A CN 1452056A
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Abstract
An MP3 player is composed of decoder (MPEG LAYER 3 chip), interface (USB), flash memory, keypad input device, D/A converter, microprocessor (MCU), encoder and power supply. The firmwork, USB driver and data management program are used for connecting to computer and managing data.
Description
Technical field:
The present invention relates to a kind of digital signal processing device, the device of especially a kind of record and replicating digital data, particularly a kind of MP3 player that numerical data is decoded as audio signal output.
Background technology:
Portable digital audio-frequency player of the prior art adopts the compact disc recordable of 3 inches specifications as record carrier, write down and reset by MD (mini disk) player, the MD player adopts magneto-optic electricity and mechanical transmissioning technology to realize reading or writing of digital signal, having occurred simultaneously in the prior art can record, the MP3 player of playback by the digital audio data of MPEG LAYER3 form compressed encoding generation duplicates or decodes, disclose a kind of MP3 player in the Chinese patent CN99111690.3 communique, described this MP3 player is connected with the data of computing machine or the automatic generator of data by the parallel port realization and exchanges.
Summary of the invention:
Technical matters to be solved by this invention is: because MD (minidisk) player of available technology adopting is to realize reading or writing of digital signal by magneto-optic electricity and mechanical transmissioning technology, and mechanical drive can cause the instability of performance, simultaneously, MD (mini disk) player can not with dataphone, can't make full use of Internet resources, limit by CD, what volume can not be enough is little, function singleness, manufacturing cost is higher; And disclosed MP3 player in the Chinese patent CN99111690.3 communique is connected with the data of computing machine or the automatic generator of data and exchanges by the parallel port realization, so exchanges data speed is slow, uses inconvenient.
The technical scheme that the present invention is adopted for solution above-mentioned technical matters of the prior art provides a kind of MP3 player, described MP3 player comprises: a decoding device, and described decoding device is decoded mp3 file according to the coding/decoding method of MPEG LAYER3 form; An interface arrangement is as the interface of download between device that external data is provided and the MP3 player and loading data file; A fixed storage apparatus, in the storage of the address of an appointment from the coded speech data file of described decoding device with from the data file of data supplying device; A finger-impu system comprises a plurality of function selecting keys, is used for selecting will be duplicated into the file of sound signal and specify a kind of predefined function with function selecting key from read-only storage; A digital to analog converter, the digital audio and video signals that decoded device is decoded converts simulated audio signal to, exports by the audio reproduction amplifying circuit in the prior art; A microprocessor, as control device, according to the output signal of finger-impu system, the read-write operation of described read-only storage is controlled in the data communication between control data generator and MP 3 players; Wherein, described microprocessor through bus is connected with power circuit in described decoding device, fixed storage apparatus, finger-impu system, digital to analog converter, interface arrangement and the prior art, described digital to analog converter is connected with audio reproduction amplifying circuit in the prior art with decoding device simultaneously, further, described decoding device adopts the MPEGLAYER3 decoding chip in the prior art, specifically can adopt the STA013 decoding integrated circuit in the prior art; In a kind of MP3 player of the present invention, can also comprise a code device in the prior art, described code device is voice data file according to predefined coding method with digital audio signal coding, in a kind of MP3 player of the present invention, can also comprise an analog to digital converter in the prior art, described analog to digital converter is connected to a speech signal amplifier with microphone, be used for and will convert digital audio and video signals to from the simulated audio signal of microphone, described analog to digital converter is connected with described microprocessor with code device; Described interface arrangement adopts USB (USB (universal serial bus)) interface in the prior art, as device that external data is provided such as computing machine, and the interface of download between the MP3 player and loading data file, described fixed storage apparatus adopts FLASH MEMORY (fast flash memory bank) the semiconductor pin-saving chip in the prior art, described microprocessor adopts MCU (the Microprogrammed Control Unit microprogram control unit) integrated circuit in the prior art, the concrete ST92T163 type integrated circuit that adopts in the prior art, described ST92T163 type integrated circuit can directly be supported USB (USB (universal serial bus)) interface communication; Further, in a kind of MP3 player of the present invention, can also comprise a display device, described display device is connected with described microprocessor, can adopt the LCD LCD in the prior art, is used to show dot array data; Further, in a kind of MP3 player of the present invention, frequency modulation broadcasting audio signal reception device in the prior art can also be set, the audio signal output of described frequency modulation broadcasting audio signal reception device partly is connected to the audio reproduction amplifying circuit in the aforesaid prior art, the sound signal after the exportable amplification; In described MP3 player, a Firmware program is set, the described MP3 player of described Firmware program management, described MP3 player is by described USB (USB (universal serial bus)) interface arrangement and the communication of PC computing machine, realize comprising that is used for the driver that USB (USB (universal serial bus)) interface is connected in the method with the communication of PC computing machine, described MP3 player is by described USB (USB (universal serial bus)) interface arrangement, a stube cable is connected with computing machine, described computing machine is controlled by a supervisory routine, described supervisory routine is used for the driver of USB (USB (universal serial bus)) interface connection and the microprocessor of the described MP3 player of Firmware procedure operation by described, and operation is to the read-write of described permanent memory.
The present invention and prior art contrast, because adopted (USB (universal serial bus)) interface of the USB in the prior art and computing machine to carry out communication, so can improve exchanges data speed, simultaneously, also make the data-interface miniaturization, simultaneously, be provided with the frequency modulation broadcasting audio signal reception device in the present invention, so can have function of radio receiver simultaneously.
Fig. 1 is the structured flowchart of a kind of MP3 player of the present invention.
Fig. 2 is the electrical schematic diagram of MP3 decoding, storage and the controls playing part of a kind of MP3 player of the present invention.
As shown in Figure 1, a kind of MP3 player of the present invention comprises: a decoding device 1, and described decoding device 1 is decoded mp3 file according to the coding/decoding method of MPEG LAYER3 form; An interface arrangement 2 is as the interface of download between device that external data is provided and the MP3 player and loading data file; A fixed storage apparatus 3, in the storage of the address of an appointment from the coded speech data file of described decoding device 1 with from the data file of data supplying device; A finger-impu system 4 comprises a plurality of function selecting keys, is used for selecting will be duplicated into the file of sound signal and specify a kind of predefined function with function selecting key from read-only storage 3; A digital to analog converter 5, the digital audio and video signals that decoded device 1 is decoded converts simulated audio signal to, exports by the audio reproduction amplifying circuit in the prior art; A microprocessor 6, as control device, according to the output signal of finger-impu system 4, the read-write operation of described read-only storage 3 is controlled in the data communication between control data generator and the MP3 player; Wherein, described microprocessor 6 is connected with power circuit 7 in described decoding device 1, fixed storage apparatus 3, finger-impu system 4, digital to analog converter 5, interface arrangement 2 and the prior art by bus, described digital to analog converter 5 is connected with audio reproduction amplifying circuit in the prior art with decoding device 1 simultaneously, further, the MPEG LAYER3 decoding chip that described decoding device 1 adopts in the prior art specifically can adopt the STA013 integrated circuit in the prior art; In a kind of MP3 player of the present invention, can also comprise a code device 8 in the prior art, described code device 8 is voice data file according to predefined coding method with digital audio signal coding, in a kind of MP3 player of the present invention, can also comprise an analog to digital converter 9 in the prior art, described analog to digital converter 9 is connected to a speech signal amplifier with microphone 10, be used for and will convert digital audio and video signals to from the simulated audio signal of microphone 10, described analog to digital converter 9 is connected with described microprocessor 6 with code device 8; USB (USB (universal serial bus)) interface that described interface arrangement 2 adopts in the prior art, as device that external data is provided such as computing machine, and the interface of download between the MP3 player and loading data file, described read-only storage 3 devices adopt FLASH MEMORY (fast flash memory bank) the semiconductor pin-saving chip in the prior art, MCU (the Microprogrammed Control Unit microprogram control unit) integrated circuit that described microprocessor 6 adopts in the prior art, the concrete ST92T163 type integrated circuit that adopts in the prior art, described ST92T163 type integrated circuit can directly be supported USB (USB (universal serial bus)) interface communication; Further, in a kind of MP3 player of the present invention, can also comprise a display device 11, described display device 11 is connected with described microprocessor 6, can adopt the LCD LCD in the prior art, is used to show dot array data.Further, in a kind of MP3 player of the present invention, frequency modulation broadcasting audio signal reception device in the prior art can also be set, the audio signal output of described frequency modulation broadcasting audio signal reception device partly is connected to the audio reproduction amplifying circuit in the aforesaid prior art, the sound signal after the exportable amplification.
In described MP3 player, be provided with a Firmware program, the described MP3 player of described Firmware program management, described MP3 player is by described USB (USB (universal serial bus)) interface arrangement 2 and the communication of PC computing machine, realize comprising that is used for the driver that USB (USB (universal serial bus)) interface 2 is connected in the method with the communication of PC computing machine, described MP3 player is by described USB (USB (universal serial bus)) interface arrangement 2, a stube cable is connected with computing machine, described computing machine is controlled by a supervisory routine, described supervisory routine is used for the driver of USB (USB (universal serial bus)) interface 2 connections and the microprocessor 6 of the described MP3 player of Firmware procedure operation by described, and operation is to the read-write of described permanent memory 3.
Fig. 2 has represented the MP3 decoding in the specific embodiment of the present invention, the electrical schematic diagram of storage and controls playing part, wherein, the ST92T163 type integrated circuit that described microprocessor 6 adopts in the prior art, adopt the STA013 integrated circuit in the prior art in described decoding device 1 and the described code device 8, adopt USB (USB (universal serial bus)) interface in the prior art in the described interface arrangement 2, the CHS1025 type LCD LCD that described display device 11 adopts in the prior art, the title of the element that is adopted in the present embodiment, model and method of attachment specifically are illustrated among Fig. 2, those having ordinary skill in the art will appreciate that and implement as shown in Figure 2 embodiment, those of ordinary skill in the art also may carry out change on concrete form or the details to specific embodiments of the present invention, but those of ordinary skill in the art knows, the change of being done does not exceed technical scheme proposed by the invention, especially the technical scope that claim limited.
Claims (10)
1, a kind of MP3 player comprises: a decoding device, and described decoding device is decoded mp3 file according to the coding/decoding method of MPEGLAYER3 form; An interface arrangement is as the interface of download between device that external data is provided and the MP3 player and loading data file; A fixed storage apparatus, in the storage of the address of an appointment from the coded speech data file of described decoding device with from the data file of data supplying device; A finger-impu system comprises a plurality of function selecting keys, is used for selecting will be duplicated into the file of sound signal and specify a kind of predefined function with function selecting key from read-only storage; A digital to analog converter, the digital audio and video signals that decoded device is decoded converts simulated audio signal to; A microprocessor, as control device, data communication between control data generator and the MP3 player, control the read-write operation of described read-only storage, it is characterized in that: described microprocessor through bus is connected with described decoding device, fixed storage apparatus, finger-impu system, digital to analog converter, interface arrangement and a power circuit, described digital to analog converter is connected with the audio reproduction amplifying circuit with decoding device simultaneously, and described decoding device adopts the MPEG LAYER3 decoding chip in the prior art; Described interface arrangement adopts USB (USB (universal serial bus)) interface in the prior art, described fixed storage apparatus adopts FLASH MEMORY (fast flash memory bank) the semiconductor pin-saving chip in the prior art, and described microprocessor adopts MCU (the Microprogrammed Control Unit microprogram control unit) integrated circuit in the prior art.
2, a kind of MP3 player as claimed in claim 1 is characterized in that: adopt the STA013 decoding integrated circuit in the prior art in the described decoding device.
3, a kind of MP3 player as claimed in claim 1, it is characterized in that: comprise in the described MP3 player one in the prior art code device and the analog to digital converter in prior art, described code device is voice data file according to predefined coding method with digital audio signal coding, described analog to digital converter is connected to a speech signal amplifier with microphone, and described analog to digital converter is connected with described microprocessor with code device.
4, a kind of MP3 player as claimed in claim 1 is characterized in that: described interface arrangement adopts USB (USB (universal serial bus)) interface in the prior art.
5, a kind of MP3 player as claimed in claim 1 is characterized in that: described microprocessor adopts the ST92T163 type integrated circuit in the prior art.
6, a kind of MP3 player as claimed in claim 1 is characterized in that: in the described MP3 player, comprise a display device, described display device is connected with described microprocessor.
7, a kind of MP3 player as claimed in claim 1, it is characterized in that: in the described MP3 player, comprise a frequency modulation broadcasting audio signal reception device in the prior art, the audio signal output of described frequency modulation broadcasting audio signal reception device partly is connected to described audio reproduction amplifying circuit.
8, a kind of MP3 player as claimed in claim 1 is characterized in that: in the described MP3 player, comprise a Firmware program, the described MP3 player of described Firmware program management.
9, a kind of MP3 player as claimed in claim 8, it is characterized in that: described MP3 player is by described USB (USB (universal serial bus)) interface arrangement and the communication of PC computing machine, realizes comprising that is used for the driver that USB (USB (universal serial bus)) interface is connected in the method with the communication of PC computing machine.
10, a kind of MP3 player as claimed in claim 9, it is characterized in that: described MP3 player is connected with computing machine by described USB (USB (universal serial bus)) interface arrangement, a stube cable, described computing machine is controlled by a supervisory routine, described supervisory routine is used for the driver of USB (USB (universal serial bus)) interface connection and the microprocessor of the described MP3 player of Firmware procedure operation by described, and operation is to the read-write of described permanent memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02111406 CN1452056A (en) | 2002-04-17 | 2002-04-17 | MP3 playback machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02111406 CN1452056A (en) | 2002-04-17 | 2002-04-17 | MP3 playback machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1452056A true CN1452056A (en) | 2003-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02111406 Pending CN1452056A (en) | 2002-04-17 | 2002-04-17 | MP3 playback machine |
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| CN (1) | CN1452056A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362499C (en) * | 2004-07-09 | 2008-01-16 | 索尼株式会社 | Electronic apparatus |
| CN100382008C (en) * | 2005-04-30 | 2008-04-16 | 英华达股份有限公司 | Medium integrating device |
| CN101364417B (en) * | 2008-09-17 | 2011-05-25 | 青岛海信移动通信技术股份有限公司 | Audio fast playing method and apparatus |
| CN101241468B (en) * | 2004-03-22 | 2012-07-11 | 索尼株式会社 | Recording apparatus and recording method |
-
2002
- 2002-04-17 CN CN 02111406 patent/CN1452056A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241468B (en) * | 2004-03-22 | 2012-07-11 | 索尼株式会社 | Recording apparatus and recording method |
| CN100362499C (en) * | 2004-07-09 | 2008-01-16 | 索尼株式会社 | Electronic apparatus |
| CN100382008C (en) * | 2005-04-30 | 2008-04-16 | 英华达股份有限公司 | Medium integrating device |
| CN101364417B (en) * | 2008-09-17 | 2011-05-25 | 青岛海信移动通信技术股份有限公司 | Audio fast playing method and apparatus |
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