CN100340999C - Digital music converter - Google Patents
Digital music converter Download PDFInfo
- Publication number
- CN100340999C CN100340999C CNB2003101135953A CN200310113595A CN100340999C CN 100340999 C CN100340999 C CN 100340999C CN B2003101135953 A CNB2003101135953 A CN B2003101135953A CN 200310113595 A CN200310113595 A CN 200310113595A CN 100340999 C CN100340999 C CN 100340999C
- Authority
- CN
- China
- Prior art keywords
- digital music
- format
- data transmission
- music file
- transmission interface
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 69
- 238000006243 chemical reaction Methods 0.000 claims abstract description 68
- 238000012545 processing Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Images
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The present invention discloses a digital music converter used for converting a digital music file in a first format into a digital music file in a second format. The digital music converter comprises a first data transmission interface, a format conversion processing module and a second data transmission interface, wherein the first data transmission interface is connected with a digital music player via a data transmission line corresponding to the first data transmission interface; a record medium carrying the digital music file in the first format is selectively arranged in the digital music player; the format conversion processing module connected with the first data transmission interface receives, analyzes, decodes and converts the digital music file in the first format into the digital music file in the second format which occupies storage space smaller than that of the first format. The second data transmission interface is connected with the format conversion processing module and selectively with a portable record medium capable of communicating with the second data transmission interface for storing the digital music file in the second format in the portable record medium.
Description
Technical field
The present invention relates to a kind of digital format file conversion device, relate in particular to a kind of digital music conversion equipment that is applied in the music CD player.
Background technology
In recent years, popular along with world-wide web, the storage of high-quality sound data is more and more important with transmission, time, cost and network bandwidth when storing and transmitting in order to reduce, work out the standard of audio signal compression technology in the world already, i.e. ISO MPEG 1 PART 3 (ISO/IEC 11172-3).This standard definition the coded system of three kinds of levels, and the coded system of wherein the 3rd layer (MPEG 1 Audio Layer 3) can reach 12: 1 compressibility to monophony (mono) or stereo (stereo) signal compression, still can keep the tonequality as music CD.
The music file standard of MP3 (MPEG Audio Layer 3) form is a kind of audio signal compression mode of having only small tonequality loss, therefore widely popular the use, because also general music in its shared storage area or voice document are little, and be also wide-spread on world-wide web.
Therefore, many playing devices, rerecording device about MP3, transcribe software etc. and also come out one after another.Yet existing digital music playing device, as a kind of MP3 walkman, must just music can be converted to MP3 format by computing machine, download to again on the MP3 numeral walkman, be confined to computing machine user and process complexity in the use, to quite inconvenience of user, and the restraint device user be the user of computing machine, also must use by computing machine on operating.
Disclosed a kind of digital walkman in the prior art, it promptly is the product under the above-mentioned notion, be stated from No. 339179 (notification number) patent in Taiwan, as shown in Figure 1, on the body B of walkman, microprocessor module 1 is set, MP3 (MPEG 1 Audio Layer3) decoder module 2, sound data file storage module 3 and system controlling software 4, the side of walkman body is provided with printer port interface b1, power switch, earphone jack and volume control knob (not shown), the surface then is provided with LCD and requirement operating key etc., be provided with digital walkman device driver and music file supervisory routine in personal computer, and with printer connecting interface 13 uploading and download interface as 12 of walkman body 11 and personal computers, utilize printer cable line and music file supervisory routine 6, MP3 sound compressed file is downloaded in the storage card (not shown) in the sound data file storage module 3 of walkman body 11 and stores by carrying out at personal computer.
In No. 339179 patent in this Taiwan, the MP3 sound compressed file on the PC is downloaded in the walkman, some inconvenience of its existence need to utilize computing machine just as above-mentioned in operation, and need to cooperate the use of software package, and are quite inconvenient.Therefore, if can directly the file conversion in the music CD can be become the music file of MP3 format, be undoubtedly a kind of music conversion equipment quite easy to use by computer operation.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of digital music playing device and digital music conversion equipment, thereby in an optical record medium, convert record music data thereon to another kind of different-format, and the music data after will changing is stored in the potable recording medium, is convenient for carrying and appreciates.
To achieve these goals, the invention provides a kind of digital music conversion equipment, the digital music conversion equipment mainly comprises: one first data transmission interface, be connected with a digital music playing device by a data line that corresponds to described first data transmission interface, described digital music playing device is optionally inserted a recording medium that is loaded with the described first format digital music file; One format conversion processing module, be connected with described first data transmission interface, receive the described first format digital music file, and analyze, decipher and convert to the described second format digital music file, occupied more described first form in storage area of wherein said second form is little; And one second data transmission interface, be connected with described format conversion processing module, and optionally connect the potable recording medium that can link up with described second data transmission interface, to store the described second format digital music file in described potable recording medium.
Above-mentioned digital music conversion equipment, its characteristics are that described format conversion processing module more includes:
One control module, be connected with second data transmission interface with described first data transmission interface, receive the first format digital music file by described first data transmission interface, analyze the described first format digital music file, and by described second data transmission interface second format digital music file is sent in the described potable recording medium and stores;
One decoding module, couple mutually with described control module, store multiple digital music specification, in order to the digital music file of described first specification is deciphered and converted to the music file of described second specification, wherein said second specification is in the described multiple digital music specification one of them; And
One buffer cell couples mutually with described control module, in order to the operation of auxiliary described control module and described decoding module.
Above-mentioned digital music conversion equipment, its characteristics are, described format conversion processing module more includes user's interface, be provided with a plurality of action buttons and a display screen, described action button is carried out control operation in order to the user to be provided, described display screen then in order to be presented in the operating process or the music format transfer process in relevant information.
The present invention also provides a kind of digital music playing device, convert the digital music file of second form in order to digital music file with one first form, include: a digital music playing device, optionally insert a recording medium that is loaded with the described first format digital music file; An and format conversion processing module, be connected with described digital music playing device by one first data transmission interface, in order to receive the described first format digital music file, and analyze, decipher and convert to the described second format digital music file, occupied more described first form in storage area of wherein said second form is little and be connected with one second data transmission interface, described second data transmission interface optionally connects the potable recording medium that can link up with described second data transmission interface, to store the described second format digital music file in described potable recording medium.
Above-mentioned digital music playing device, its characteristics are that described format conversion processing module more includes:
One control module, be connected with second data transmission interface with described first data transmission interface, analyze the described first format digital music file case, and receive the first format digital music file, and by described second data transmission interface second format digital music file is sent in the described potable recording medium and stores by described first data transmission interface;
One decoding module, couple mutually with described control module, store multiple digital music specification, in order to the described first specification digital music file is deciphered and converted to the described second specification music file, wherein said second specification is in the described multiple digital music specification one of them; And
One buffer cell couples mutually with described control module, in order to the operation of auxiliary described control module and described decoding module.
Above-mentioned digital music playing device, its characteristics are, described format conversion processing module more includes user's interface, be provided with a plurality of action buttons and a display screen, described action button is carried out control operation in order to the user to be provided, described display screen then in order to be presented in the operating process or the music format transfer process in relevant information.
Above-mentioned digital music playing device, its characteristics are that described control module is a digital signal processing (DSP) chip.
Above-mentioned digital music playing device, its characteristics are that described first data transmission interface is selected from the group that is made up of a high speed data transmission interface, a pcmcia interface, a USB (universal serial bus) and an integration electronic type driving interface any one.
Above-mentioned digital music playing device, its characteristics be, described second data transmission interface is selected from by a high speed data transmission interface, a pcmcia interface, a USB (universal serial bus) and and integrates in the group that the electronic type driving interface formed one.
Above-mentioned digital music playing device, its characteristics be, described potable recording medium are selected from the group that is made up of a pcmcia memory card and a flash memory card wherein any one.
Because device in the past is confined to computing machine user and process complexity in the use,, influence popularizing of device to quite inconvenience of user.And the effect of the digital music conversion equipment among the present invention is, can finish the conversion of digital music file form by the operation of computing machine, and is quite convenient in the use.In addition, the present invention can convert the music file that occupies bigger storage volume to the less music file of storage volume, for example there are hundreds of MB the storage area at its place of music CD of one ten first song, and it is not portable, change after the another kind of form, for example MP3, the then then tens of approximately MB of ten first songs, it is quite big to occupy storage volume difference, therefore can be stored in the portable Storage Media.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the digital walkman system block diagrams of prior art
Fig. 2 is the system construction drawing of digital music conversion equipment among the present invention
Fig. 3 is the module calcspar of digital music conversion equipment among the present invention
Fig. 4 is the method flow diagram of digital music conversion equipment among the present invention
Fig. 5 is second embodiment of digital music conversion equipment among the present invention
Wherein, Reference numeral:
1-microprocessor module
2-MP3 (MPEG 1 Audio Layer 3) decoder module
3-sound data file storage module
The 4-system controlling software
5-numeral walkman device driver
6-music file supervisory routine
11-walkman body
The 12-personal computer
13-printer connecting interface
10-digital music playing device
20-digital music conversion equipment
The 21-control module
22-user's interface
The 23-decoding module
The 24-buffer cell
30-potable recording medium
The 40-data transmission interface
The 41-data transmission interface
42-format conversion processing module
Embodiment
Fig. 2 is the system architecture diagram of digital music conversion equipment of the present invention, mainly include three ingredients, be respectively digital music playing device 10, digital music conversion equipment 20 and potable recording medium 30, each other by first data transmission interface 40 and 41 and data line connects and Data transmission.
Digital music playing device 10 is in order to play a recording medium that is loaded with digital music file, the file layout of digital music file is defined herein as first form, for example Compact Flash or music CD etc., if music CD, digital music file form is the CDI form on it, and then digital music playing device 10 can be the playing device that a walkman, sound equipment, VCD player or other can the playing back music CDs.
Digital music conversion equipment 20 is connected with digital music playing device 10 by first data transmission interface 40 and data line, first data transmission interface 40 can be USB (universal serial bus) (USB) interface or high speed data transmission interfaces such as IEEE1394 bus interface or IDE (Integrated Device Electronic integrates the electronic type driving interface) bus interface.The user can utilize a transmission data line corresponding to first data transmission interface 40 to be plugged on first data transmission interface 40, and digital music conversion equipment 20 is received from the digital music file on the digital music playing device 10.
After digital music conversion equipment 20 receives digital music file, to analyze digital music file, decoding and format transformation, and judge whether earlier to being supported or meeting the defined file specification of user, if meet, then this digital music file is become the digital music file of corresponding specification by first format conversion, digital music file after the conversion is defined herein as second form, that is to say that the disclosed digital music conversion equipment of the present invention can convert the digital music file of first form to second form, first form is two kinds of different music formats with second form.The second format digital music file after the format transformation then is stored on the potable recording medium 30 by second data transmission interface 41.Second form can be the digital music file of MP3, WMA (Windows Media Audio) or AAC (Advanced Audio Coding, advanced message coding) form.In other words, the occupied storage area of the digital music file of first form is big than the second format digital music file.
WMA is the 1/3-1/4 that the file size of a kind of new music format WMA of working it out of Microsoft has only MP3, and for example the MP3 of a first 4MB converts to after the WMA, probably the capacity of remaining 1-2MB.
AAC is that a kind of contractive pressure sound signal is more efficient than MP3 format, and the while can also provide the tonequality as the CD.With the AAC message file of 128kbps (stereo) compacting, its quality is almost equally matched with the source of sound of uncompressed.The AAC coder is researched and developed by the MPEG tissue.
The present invention is characterized in to be unfavorable for the digital music playing device 10 that carries, after converting the first format digital music file to second format digital music file by a digital music conversion equipment 20, be stored in potable recording medium 30, be easy to carry.By above description as can be known, utilize the disclosed digital music conversion equipment 20 of the present invention only need to connect with put into store digital music recording medium in digital music playing device 10, can carry out the program of music format conversion, compare with prior art and need use computing machine and carry out music format conversion, considerably simple really in the use with easily.
Then, do a detailed explanation with regard to the module calcspar Fig. 3 in the digital music conversion equipment 20.
In the digital music conversion equipment 20 except first data transmission interface 40, second data transmission interface 41, utilize a format conversion processing module 42 to carry out main format analysis, decoding and conversion operations, format conversion processing module 42 mainly includes a control module 21, user's interface 22, decoding module 23 and buffer cell 24.Wherein, user's interface 22, decoding module 23 and buffer cell 24 couple mutually with control module respectively.21 of control modules are connected with first data transmission interface 40 and second data transmission interface 41, thereby receive the digital music file of first form by first data transmission interface 40, and by second data transmission interface 41 digital music file of second form is sent in the potable recording medium 30 and to store.Control module 21 preferred embodiments are a digital signal processing (DSP) chip.It is in order to the communication with system of control buffer cell 24, I/O Address and decoding module 23.
Then be provided with a plurality of action buttons and a display screen in user's interface 22, action button is carried out control operation in order to the user to be provided, display screen then in order to be presented in the operating process or the music format transfer process in relevant information or error message.
Then store multiple digital music file form in the decoding module 23, for example MP3, WMA, AAC music format, in order to the digital music file of first form is deciphered according to stored music file formats, decoding module 23 can effectively be handled various music formats and make it to meet digital standard.Buffer cell 24 can for example be a core buffer, so that control module 21 has the various data accesses of enough spatial manipulation.Auxiliary control module 21 is carried out the running of converting digital music file formats, to improve the speed of accelerating conversion.
At last, cooperating the method flow diagram of Fig. 4 to do one with regard to the converse routine in the control module describes in detail.
Utilize transmission line with digital music playing device 10 with after digital music conversion equipment 20 is connected, step 100, promptly activate the digital music playing device, after the activation, control module 21 in the digital music conversion equipment 20 will be carried out a series of inspection to music format, to determine whether the carrying out conversion of music format.
At first, step 110, whether recording medium is arranged in the check dight music player, if no, step 210 then, the user's interface 22 in digital music conversion equipment 20 shows error messages, if have, then whether step 120 has digital music file in the affirmation recording medium, if do not have, step 220 then, user's interface 22 in digital music conversion equipment 20 shows error messages, if having, and step 130 then, whether the form of check dight music file is supported, if no, step 240 then, the user's interface 22 in digital music conversion equipment 20 shows error messages.
Digital music file has two kinds of forms in the recording medium, is respectively phonetic matrix (audio type) and file layout (file type), and 20 of digital music conversion equipments carry out different format transformations according to different forms.Step 140, if phonetic matrix, step 160 then judges whether the form supported for system, if do not support, then step 230 shows error message.If for the file layout of supporting, then carry out step 170, judges whether file layout is the music file formats that the user selectes.Step 150 when being file layout as if digital music file in the recording medium, then directly carry out step 170.
Step 170 item is to judge whether the detected digital music file form of system is the selected file layout of user, if step 200 then directly copies to the first format digital music file in the potable recording medium 30 and stores.If not, step 180 then, by decoding module 23, and carry out the conversion of file layout by buffer cell 24 by control module 21, last execution in step 190 copies to the second format digital music file after the conversion in the recording medium and to store.
Above for embodiment in, digital music playing device 10 and two different devices of digital music conversion equipment 20 for separating are connected by data line and data transmission interface bus.Can use among second embodiment Fig. 5 of notion of the present invention at another, digital music conversion equipment 20 among the present invention is arranged in the digital music playing device 10, in the use, the user only needs potable recording medium 30 are inserted in the digital music playing device 10, connection by second data transmission interface 41, and the action button on the digital music playing device 10, can convert the digital music file of first form in the digital music playing device 10 digital music file of second form to, and be stored in the potable recording medium 30.
Foregoing; it only is most preferred embodiment of the present invention; and non-limiting protection scope of the present invention, those of ordinary skills' inventive concept main according to the present invention all can be carried out corresponding modification and conversion, so scope of patent protection of the present invention is as the criterion with the desired protection domain of claims.
Claims (10)
1, a kind of digital music conversion equipment converts the digital music file of second form in order to the digital music file with one first form, it is characterized in that, includes:
One first data transmission interface, be connected with a digital music playing device by a data line that corresponds to described first data transmission interface, described digital music playing device is optionally inserted a recording medium that is loaded with the described first format digital music file;
One format conversion processing module comprises:
One control module, be connected with described first data transmission interface and second data transmission interface, receive the first format digital music file by described first data transmission interface, analyze the form of the described first format digital music file, and by described second data transmission interface second format digital music file is sent in the described potable recording medium and stores;
One decoding module, couple mutually with described control module, store multiple digital music format, in order to the digital music file of described first form is deciphered and is converted to the music file of described second form, wherein said second form is in the described multiple digital music format one of them, and occupied more described first form in storage area of wherein said second form is little; And
One buffer cell couples mutually with described control module, in order to the operation of auxiliary described control module and described decoding module; And
One second data transmission interface, be connected with described format conversion processing module, and optionally connect the potable recording medium that can link up with described second data transmission interface, to store the described second format digital music file in described potable recording medium.
2, digital music conversion equipment according to claim 1 is characterized in that, described control module further comprises:
Judge whether the described first format digital music file is the unit of phonetic matrix;
Whether the first format digital music file of judging described phonetic matrix is the unit of the form of support;
Judge that whether the described first format digital music file is the unit of the form selected of user.
3, digital music conversion equipment according to claim 1 and 2, it is characterized in that, described format conversion processing module more includes user's interface, be provided with a plurality of action buttons and a display screen, described action button is carried out control operation in order to the user to be provided, described display screen then in order to be presented in the operating process or the music format transfer process in relevant information.
4, a kind of digital music playing device converts the digital music file of second form in order to the digital music file with one first form, includes:
One digital music playing device is optionally inserted a recording medium that is loaded with the described first format digital music file;
One first data transmission interface is connected with described digital music playing device, in order to receive the described first format digital music file;
One format conversion processing module comprises:
One control module, be connected with described first data transmission interface and second data transmission interface, analyze the form of the described first format digital music file, and receive the first format digital music file, and by described second data transmission interface second format digital music file is sent in the potable recording medium and stores by described first data transmission interface;
One decoding module, couple mutually with described control module, store multiple digital music format, in order to the described first format digital music file is deciphered and is converted to the described second form music file, wherein said second form is in the described multiple digital music format one of them, and occupied more described first form in storage area of wherein said second form is little; And
One buffer cell couples mutually with described control module, in order to the operation of auxiliary described control module and described decoding module; And
One second data transmission interface optionally connects the potable recording medium that can link up with described second data transmission interface, to store the described second format digital music file in described potable recording medium.
5, digital music playing device according to claim 4 is characterized in that, described control module further comprises:
Judge whether the described first format digital music file is the unit of phonetic matrix;
Whether the first format digital music file of judging described phonetic matrix is the unit of the form of support;
Judge that whether the described first format digital music file is the unit of the form selected of user.
6, according to claim 4 or 5 described digital music playing devices, it is characterized in that, described format conversion processing module more includes user's interface, be provided with a plurality of action buttons and a display screen, described action button is carried out control operation in order to the user to be provided, described display screen then in order to be presented in the operating process or the music format transfer process in relevant information.
7, according to claim 4 or 5 described digital music playing devices, it is characterized in that described control module is a digital signal processing chip.
8, according to claim 4 or 5 described digital music playing devices, it is characterized in that described first data transmission interface is selected from the group that is made up of a high speed data transmission interface, a pcmcia interface, a USB (universal serial bus) and an integration electronic type driving interface any one.
9, according to claim 4 or 5 described digital music playing devices, it is characterized in that described second data transmission interface is selected from by a high speed data transmission interface, a pcmcia interface, a USB (universal serial bus) and one and integrates in the group that the electronic type driving interface formed one.
According to claim 4 or 5 described digital music playing devices, it is characterized in that 10, described potable recording medium are selected from the group that is made up of a pcmcia memory card and a flash memory card wherein any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101135953A CN100340999C (en) | 2003-11-14 | 2003-11-14 | Digital music converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101135953A CN100340999C (en) | 2003-11-14 | 2003-11-14 | Digital music converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1617106A CN1617106A (en) | 2005-05-18 |
| CN100340999C true CN100340999C (en) | 2007-10-03 |
Family
ID=34759986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101135953A Expired - Lifetime CN100340999C (en) | 2003-11-14 | 2003-11-14 | Digital music converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100340999C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370437C (en) * | 2005-09-30 | 2008-02-20 | 迈世亚（北京）科技有限公司 | Method for duplicating music data |
| KR101116617B1 (en) * | 2007-07-20 | 2012-03-07 | 삼성전자주식회사 | Method and apparatus for transmitting and processing audio with I2S format |
| JP7158871B2 (en) * | 2018-03-15 | 2022-10-24 | キヤノン株式会社 | Program and information processing device |
| CN112784534A (en) * | 2020-05-06 | 2021-05-11 | 北京金山办公软件股份有限公司 | Electronic document weight reduction method and device, electronic equipment and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6122721A (en) * | 1995-09-26 | 2000-09-19 | Advanced Micro Devices, Inc. | Reservation station for a floating point processing unit |
| CN1287320A (en) * | 1999-09-03 | 2001-03-14 | 北京航空航天大学 | Method of converting image information into music |
-
2003
- 2003-11-14 CN CNB2003101135953A patent/CN100340999C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6122721A (en) * | 1995-09-26 | 2000-09-19 | Advanced Micro Devices, Inc. | Reservation station for a floating point processing unit |
| CN1287320A (en) * | 1999-09-03 | 2001-03-14 | 北京航空航天大学 | Method of converting image information into music |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1617106A (en) | 2005-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1957365A (en) | Nonvolatile memory card adaptable to plural specifications | |
| CN1505783A (en) | Low power digital audio decoding/playing system for computing devices | |
| CN1956054A (en) | MP3 player of implementing music shared based on blue tooth technology and its method | |
| CN100340999C (en) | Digital music converter | |
| CN1264328C (en) | Portable information apparatus for processing inputted data from external apparatus and method thereof | |
| CN1591314A (en) | Audio player with lyrics display | |
| CN101067897A (en) | Digital TV set remote-controller based on bluetooth and controlling method thereof | |
| CN1340770A (en) | Multi-media module card, equipment for its operation and integrated multi-media system | |
| US20060253288A1 (en) | Audio coding and decoding apparatus, computer device incorporating the same, and method thereof | |
| CN101025724A (en) | Audio media storage and play device | |
| CN1504855A (en) | Multifunctional multimedia palm computer | |
| CN2418520Y (en) | Portable digital music-player | |
| CN1808384A (en) | Controller with automatic execution function | |
| CN1897110A (en) | High-quality audio-frequency signal coverting playback device with solid memory as media | |
| US20040231495A1 (en) | Digital music conversion device | |
| CN1818899A (en) | Data searching method of MPEG player | |
| CN1694077A (en) | Electrical host system with expandable optical disk recording and playing device | |
| CN2751356Y (en) | Voice playing device using USB OTG transmission interface | |
| CN1947196A (en) | Record reproducing device, simultaneous record reproduction control method and simultaneous record reproduction control program | |
| CN1609822A (en) | Portable data splitting backup apparatus and method | |
| CN2645180Y (en) | Wireless voice device with MP3 coding/recording chip | |
| CN2631845Y (en) | Shockproof loudspeaker device on vehicle | |
| CN1694172A (en) | Expandable optical disk recording and playing system and main board thereof | |
| CN2735436Y (en) | Media player having USB slot | |
| CN1261845C (en) | Digital playback circuit and playback method for image display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071003 |