CN100340999C - A digital music conversion device - Google Patents

Abstract

The invention discloses a digital music conversion device, which is used for converting a digital music file in a first format into a digital music file in a second format and comprises: a first data transmission interface connected with a digital music playing device through a data transmission line corresponding to the first data transmission interface, the digital music playing device selectively placing a recording medium carrying a first format digital music file; the format conversion processing module is connected with the first data transmission interface, receives the first format digital music file, analyzes, decodes and converts the first format digital music file into a second format digital music file, wherein the second format occupies a smaller storage space than the first format; and a second data transmission interface connected with the format conversion processing module and selectively connected with a portable recording medium capable of communicating with the second data transmission interface so as to store the second format digital music file in the portable recording medium.

Description

A digital music conversion device

technical field

The invention relates to a digital format file conversion device, in particular to a digital music conversion device applied in a music CD player.

Background technique

In recent years, with the popularity of the Internet, the storage and transmission of high-quality audio data has become more and more important. In order to reduce the time, cost and network bandwidth of storage and transmission, audio signal compression technology standards have been established internationally. , namely ISO MPEG 1 PART 3 (ISO/IEC 11172-3). This standard defines three levels of encoding methods, and the third layer (MPEG 1 Audio Layer 3) encoding method can compress mono or stereo (stereo) signals up to a compression ratio of 12:1, still Sound quality like an audio CD can be maintained.

The music file standard of MP3 (MPEG Audio Layer 3) format is an audio signal compression method with only a small loss of sound quality, so it is widely used by the public. Because it occupies less storage space than ordinary music or voice files, it is popular on the Internet. It is also widely circulated on the Internet.

Therefore, many playback devices, transcription devices, transcription software etc. about MP3 also come out one after another. Yet existing digital music player, as a kind of MP3 Walkman, must rely on computer just can music be converted into MP3 format, then download on the MP3 digital Walkman, use is limited to computer user and the process is complicated, to the user It is quite inconvenient, and the user of the device is limited to a computer user, and the operation must also be used through a computer.

A kind of digital walkman has been disclosed in the prior art, which is the product under the above-mentioned concept, and is contained in Taiwan No. 339179 (Notice No.) patent, as shown in Figure 1, a microprocessor module is set on the body B of the walkman 1. MP3 (MPEG 1 Audio Layer3) decoder module 2. Sound data file storage module 3 and system control software 4. The side of the walkman body is provided with a printer port interface b1, a power switch, an earphone jack and a volume control button (not shown in the figure), the surface is then provided with liquid crystal display and required quantity control keys etc., has been provided with digital walkman device driver and music file management program in personal computer, and with printer connection interface 13 as walkman body 11 and The uploading and downloading interface between personal computer 12, utilize printer cable line and by the music file management program 6 that personal computer is carried out, MP3 sound compression file is downloaded to the memory card ( not shown in the figure) stored.

In this Taiwan No. 339179 patent, the MP3 sound compression file on the PC is downloaded to the Walkman, and some inconveniences exist just as mentioned above. The operation requires the use of a computer and the use of a software package, which is quite inconvenient. . Therefore, if the files in the music CD can be directly converted into music files in MP3 format without operating through a computer, it is undoubtedly a very easy-to-use music conversion device.

Contents of the invention

The technical problem to be solved by the present invention is to provide a digital music playback device and a digital music conversion device, so that from an optical recording medium, the music data recorded on it is converted into another different format, and the converted The music data is stored in a portable recording medium, which is convenient to carry and enjoy.

In order to achieve the above object, the present invention provides a digital music conversion device, the digital music conversion device mainly includes: a first data transmission interface, through a data transmission line corresponding to the first data transmission interface and a digital music player device connection, the digital music playback device selectively inserts a recording medium carrying the digital music file in the first format; a format conversion processing module, connected with the first data transmission interface, receives the first format a digital music file in a format, which is analyzed, decoded and converted into a digital music file in a second format, wherein the storage space occupied by the second format is smaller than that in the first format; and a second data transmission interface, It is connected with the format conversion processing module, and selectively connected with a portable recording medium that can communicate with the second data transmission interface, so as to store the digital music files in the second format in the portable recording medium.

The above-mentioned digital music conversion device is characterized in that the format conversion processing module further includes:

A control module, connected to the first data transmission interface and the second data transmission interface, receives the digital music file in the first format through the first data transmission interface, analyzes the digital music file in the first format, and passes the The second data transmission interface transmits the digital music file in the second format to the portable recording medium for storage;

A decoding module, coupled with the control module, stores multiple digital music specifications, and is used to decode and convert the digital music files of the first specification into music files of the second specification, wherein the The second specification is one of the multiple digital music specifications; and

A buffer unit, coupled with the control module, is used to assist the operation of the control unit and the decoding module.

The above-mentioned digital music conversion device is characterized in that the format conversion processing module further includes a user interface provided with a plurality of operation buttons and a display screen, the operation buttons are used to provide the user with control operations, and the display The screen is used to display relevant information during operation or music format conversion.

The present invention also provides a digital music player for converting a digital music file in a first format into a digital music file in a second format, comprising: a digital music player selectively inserted into a The recording medium of the digital music file in the first format; and a format conversion processing module connected to the digital music playback device through a first data transmission interface, in order to receive the digital music file in the first format, and analyze, Decoding and converting digital music files into the second format, wherein the storage space occupied by the second format is smaller than that of the first format and connected to a second data transmission interface, the second data transmission interface Selectively connect a portable recording medium capable of communicating with the second data transmission interface to store the second format digital music file in the portable recording medium.

The above-mentioned digital music player is characterized in that the format conversion processing module further includes:

A control module, connected with the first data transmission interface and the second data transmission interface, analyzing the first format digital music file, and receiving the first format digital music file through the first data transmission interface, and transmitting the digital music file in the second format to the portable recording medium through the second data transmission interface;

A decoding module, coupled with the control module, stores multiple digital music specifications, and is used to decode and convert the digital music files of the first specification into music files of the second specification, wherein the first specification The second specification is one of the various digital music specifications; and

A buffer unit, coupled with the control module, is used to assist the operation of the control unit and the decoding module.

The above-mentioned digital music player is characterized in that the format conversion processing module further includes a user interface, which is provided with a plurality of operation buttons and a display screen, the operation buttons are used to provide the user with control operations, and the display The screen is used to display relevant information during operation or music format conversion.

The above-mentioned digital music playing device is characterized in that the control module is a digital signal processing (DSP) chip.

The above-mentioned digital music player is characterized in that the first data transmission interface is selected from any one of the group consisting of a high-speed data transmission interface, a PCMCIA interface, a universal serial bus interface and an integrated electronic drive interface .

The above-mentioned digital music player is characterized in that the second data transmission interface is selected from a group consisting of a high-speed data transmission interface, a PCMCIA interface, a universal serial bus interface and an integrated electronic drive interface. .

The above-mentioned digital music player is characterized in that the portable recording medium is selected from any one of the group consisting of a PCMCIA memory card and a flash memory card.

Because the use of conventional devices is limited to computer users and the process is complicated, it is quite inconvenient for users and affects the popularization of devices. And the effect of the digital music conversion device in the present invention is that the conversion of the digital music file format can be completed without the operation of a computer, which is quite convenient in use. In addition, the present invention can convert a music file occupying a relatively large storage capacity into a music file with a small storage capacity. For example, a music CD with ten songs has hundreds of MB of storage space and is not easy to carry. After different formats, such as MP3, ten songs are about tens of MB, occupying a considerable difference in storage capacity, so they can be stored in portable storage media.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Fig. 1 is the digital walkman system block diagram of prior art

Fig. 2 is the system structural diagram of digital music conversion device in the present invention

Fig. 3 is the module block diagram of digital music conversion device in the present invention

Fig. 4 is the method flowchart of digital music conversion device in the present invention

Fig. 5 is the second embodiment of the digital music conversion device in the present invention

Among them, reference signs:

1- Microprocessor module

2-MP3 (MPEG 1 Audio Layer 3) decoder module

3-Sound data file storage module

4- System control software

5-Digital Walkman Driver

6-Music file management program

11- Walkman body

12-personal computer

13-Printer connection interface

10-Digital music player

20-Digital music conversion device

21-Control Module

22-User Interface

23-decoding module

24-buffer unit

30 - Portable recording media

40-data transmission interface

41-Data transmission interface

42-Format conversion processing module

Detailed ways

Fig. 2 is a system architecture diagram of the digital music conversion device of the present invention, which mainly includes three components, which are respectively a digital music playback device 10, a digital music conversion device 20, and a portable recording medium 30, which are connected to each other through the first data transmission interface. 40 and 41 and the data transmission line are connected and transmit data.

Digital music player 10 is used to play a recording medium carrying digital music files. The file format of digital music files is defined as the first format here, such as CF memory card or music CD, etc. If it is a music CD, the digital music on it If the file format is CDI format, then the digital music playing device 10 can be a walkman, stereo, VCD player or other playing devices capable of playing music CDs.

Digital music conversion device 20 is connected with digital music playback device 10 by first data transmission interface 40 and data transmission line, and first data transmission interface 40 can be Universal Serial Bus (USB) interface or IEEE1394 bus interface or IDE (Integrated Device Electronic , Integrated electronic drive interface) bus interface and other high-speed data transmission interfaces. The user can use a transmission data cable corresponding to the first data transmission interface 40 to plug in the first data transmission interface 40 to make the digital music converting device 20 receive digital music files from the digital music playing device 10 .

After the digital music conversion device 20 receives the digital music file, it will analyze, decode and convert the digital music file, and first judge whether it is supported or meets the file specification defined by the user. Music files are converted from the first format into digital music files of corresponding specifications, and the converted digital music files are defined as the second format here, that is to say, the digital music conversion device disclosed in the present invention can convert the digital music files of the first format into The file is converted into a second format, and the first format and the second format are two different music formats. The converted digital music files in the second format are stored on the portable recording medium 30 through the second data transmission interface 41 . The second format can be a digital music file in MP3, WMA (Windows Media Audio) or AAC (Advanced Audio Coding, advanced audio coding) format. In other words, the digital music files in the first format occupy a larger storage space than the digital music files in the second format.

WMA is a new music format made by Microsoft. The file size of WMA is only 1/3-1/4 of MP3. For example, after a 4MB MP3 is converted into WMA, there is about 1-2MB left.

AAC is a compressed audio signal that is more efficient than the MP3 format, while still providing CD-like sound quality. AAC audio files compressed at 128kbps (stereo) are almost as good as uncompressed sources. The AAC codec was developed by the MPEG organization.

The portable recording medium 30 can be a PCMCIA memory card or a fast flash memory card, such as a USB flash drive, an MS card (Memory Stick), a CF card (Compact Flash), an MMC card (MultiMedia Card), an SD card (Secure Digital), or an SM card (Smart Media) etc.

The main feature of the present invention is that the digital music player 10, which is not conducive to carrying, converts the first format digital music file into the second format digital music file through a digital music conversion device 20, and then stores it in the portable recording medium 30, which is easy to carry . As can be seen from the above description, using the digital music conversion device 20 disclosed in the present invention only needs to connect and put the recording medium storing digital music in the digital music playback device 10, and then the music format conversion program can be performed, which is different from the prior art Compared with the need to use a computer for music format conversion, it is indeed quite simple and easy to use.

Next, a detailed description will be made on the block diagram of the modules in the digital music conversion device 20 shown in FIG. 3 .

In addition to the first data transmission interface 40 and the second data transmission interface 41 in the digital music conversion device 20, a format conversion processing module 42 is used to perform main format analysis, decoding and conversion operations. The format conversion processing module 42 mainly includes a control module 21 , user interface 22 , decoding module 23 and buffer unit 24 . Wherein, the user interface 22 , the decoding module 23 and the buffer unit 24 are respectively coupled to the control module. The control module 21 is then connected with the first data transmission interface 40 and the second data transmission interface 41, thereby receiving the digital music file in the first format through the first data transmission interface 40, and transferring the digital music file in the second format through the second data transmission interface 41. The digital music files are sent to the portable recording medium 30 for storage. A preferred example of the control module 21 is a digital signal processing (DSP) chip. It is used to control the communication between the buffer unit 24, the input and output addresses and the decoding module 23 and the system.

The user interface 22 is provided with a plurality of operation buttons and a display screen, the operation buttons are used to provide the user with control operations, and the display screen is used to display relevant information or error messages during the operation process or the music format conversion process .

Then store multiple digital music file formats in the decoding module 23, such as MP3, WMA, AAC music format, in order to decode the digital music files of the first format according to the stored music file format, the decoding module 23 can Efficiently handles various music formats to conform to digital standards. The buffer unit 24 can be, for example, a memory buffer, so that the control module 21 has enough space to process various data accesses. The auxiliary control module 21 performs the operation of converting the format of the digital music file, so as to improve and speed up the conversion.

Finally, a detailed description will be made on the conversion program in the control module in conjunction with the method flow chart in FIG. 4 .

After the digital music player 10 is connected with the digital music conversion device 20 by a transmission line, step 100 is to activate the digital music player. After the activation, the control module 21 in the digital music conversion device 20 will perform a series of checks on the music format to Determines whether music format conversion is possible.

First, step 110, check whether there is a recording medium in the digital music player, if not, then step 210, an error message is displayed on the user interface 22 in the digital music conversion device 20, if there is, then step 120, confirm that there is a recording medium in the recording medium Whether there is a digital music file, if not, then step 220, the user interface 22 in the digital music conversion device 20 displays an error message, if there is, then step 130, checks whether the format of the digital music file supports, if not, then step 240, the user interface 22 in the digital music conversion device 20 displays an error message.

There may be two formats of digital music files in the recording medium, namely voice format (audio type) and file format (file type), and digital music conversion device 20 then performs different conversion formats according to different formats. Step 140, if it is a voice format, then step 160, judge whether it is a format supported by the system, if not, then step 230, display an error message. If it is a supported file format, proceed to step 170 to determine whether the file format is a music file format selected by the user. Step 150, if the digital music file in the recording medium is in file format, then go to step 170 directly.

Step 160, comparing the format of the digital music file on the recording medium with the file format previously stored in the decoding module 23, if the corresponding file format is not stored in the decoding module 23, then it cannot be disclosed by the present invention The digital music conversion device 20 converts music formats. When it is confirmed that the format of the digital music file is supported by the digital music conversion device 20, the conversion procedure of the format of the digital music file can be performed.

Step 170 is to judge whether the digital music file format detected by the system is the file format selected by the user, if yes, then step 200, directly copy the first format digital music file to the portable recording medium 30 for storage. If not, in step 180, the decoding module 23 and the control module 21 convert the file format through the buffer unit 24, and finally execute step 190 to copy the converted second format digital music file to the recording medium for storage.

In the above mentioned embodiments, the digital music playing device 10 and the digital music converting device 20 are two separate devices, which are connected by a data transmission line and a data transmission interface bus. In Fig. 5, another second embodiment to which the concept of the present invention can be applied, the digital music conversion device 20 of the present invention is set in the digital music playback device 10. In use, the user only needs to insert the portable recording medium 30 into the In the digital music player 10, through the connection of the second data transmission interface 41, and the operation button on the digital music player 10, the digital music file in the first format in the digital music player 10 can be converted into the second format digital music files, and stored in the portable recording medium 30.

The above-mentioned content is only the best embodiment of the present invention, not limiting the scope of protection of the present invention, those of ordinary skill in the art can carry out corresponding modification and transformation according to the main inventive concepts of the present invention, so the scope of protection of the patent of the present invention is based on the right The scope of protection required by the letter of demand shall prevail.

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.

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