KR20110078898A - Car audio system having mobile storage medium based semiconductor memory for providing highquality uncompressed audio - Google Patents

Abstract

PURPOSE: A car audio system with a semiconductor memory based portable storage media is provided to efficiently utilize the interior of a car by reproducing an audio data through a small sized portable storage medium. CONSTITUTION: A stored medium reproducing unit(40) receives and reproduces a portable storage medium(41) which contains an audio data. A liquid crystal display(50) displays the reproduction information of the audio data in real time. The portable audio storage medium contact unit(41a) comprises data and a storage part(41b). The contact unit connected to the stored medium reproducing unit transfers data between the stored medium reproducing unit and the inner data storage area.

Description

CAR AUDIO SYSTEM HAVING MOBILE STORAGE MEDIUM BASED SEMICONDUCTOR MEMORY FOR PROVIDING HIGHQUALITY UNCOMPRESSED AUDIO}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car audio system equipped with a semiconductor memory-based storage medium for providing high quality uncompressed audio. The present invention relates to reproducing audio data through a portable storage medium having a relatively small volume compared to a conventional cassette tape and an audio CD. It is a technology that makes the body of the car audio system relatively smaller than the conventional one so that the space inside the car can be utilized efficiently, especially UDF (Universal Disk Format) used in optical storage media in portable external semiconductor storage media. By applying the file system and providing the file structure of DVD-VIDEO format to provide high quality uncompressed PCM audio data, it provides high quality uncompressed audio that recognizes and plays back high quality uncompressed audio data contained in portable flash memory in the same way as DVD. Semiconductor memory for The present invention relates to a car audio system, equipped with a half of a storage medium.

The modern information technology industry is developing fast enough to be difficult for people to learn, and the life is complicated and developed. In addition, our life is getting longer from 3 hours to 4 hours a day in a car, so cultural contents are being developed. One of them is car audio. In general, the use rate of CD player is higher than the conventional cassette tape player.

Recently, however, MP3 compression has been widely used to provide music files. This is because the MP3 music file has a small size and excellent sound quality. However, since MP3 music files are formats in which some frequency bands constituting a sound source are deleted and compressed, sound quality is inevitably deteriorated compared to a conventional CD sound source.

Conventional optical storage media such as CDs have been widely used for providing high-quality, uncompressed audio data. However, in recent years, portability and capacity have been limited, leading to a decrease in popularity. In addition, uncompressed audio data takes up more capacity than MP3 compressed data, so it only takes a few songs on a single CD medium, making it easier to store and use tens or hundreds of MP3 audio data in a portable MP3 player. There is no choice but to be greatly ignored by users.

The medium in which MP3 files are stored generally takes the form of a semiconductor memory such as a USB memory or a flash memory and employs a FAT file system. The FAT file system is a file system optimized for storing a large amount of hierarchical data and does not represent a structure of a file system designed for sound source reproduction. In addition, when the uncompressed high-quality music file is stored in the semiconductor memory, memory management is not easy because the capacity is very large compared to the MP3 file.

The present invention has been made in view of the above, and an object of the present invention is to provide a portable storage medium capable of storing high-quality uncompressed music data, and high-quality uncompressed to recognize and process the storage medium as if it is playing a DVD. The present invention provides a car audio system having a portable storage medium based on a semiconductor memory for providing audio.

Another object of the present invention is to provide a portable storage medium based on a semiconductor memory for providing a high quality uncompressed audio capable of playing a high quality external sound source in a car audio system having only a memory slot without a drive capable of recognizing an optical medium. In providing a car audio system provided.

Another object of the present invention is to reproduce the audio data through a portable storage medium, which is relatively small volume compared to the conventional cassette tape, audio CD to implement the body portion of the car audio system relatively less than the existing space inside the car The present invention provides a car audio system equipped with a portable storage medium based on a semiconductor memory for providing high quality uncompressed audio that can be efficiently utilized.

In order to achieve the above object, a car audio system having a semiconductor memory-based storage medium for providing high-quality uncompressed audio according to the present invention is a car audio system having an audio player. A storage medium reproducing unit inserted and reproduced; And a liquid crystal display unit for displaying the reproduction information of each audio data in real time. The portable storage medium may include a contact unit connected to the storage medium reproducing unit to move data between the storage medium reproducing unit and the internal data storage area. And a memory structure including a data storage area having a memory address assigned to each data storage space. The data storage area includes a volume structure, a directory, recorded in a specific area, and defining a physical medium as available space. A file system structure including a file structure defining hierarchical arrangement of files, wherein location information of specific data is identified through a volume structure and a file structure; One or more audio data arranged in accordance with the file system structure.

The storage medium reproducing unit is arranged in a plurality of slot forms, and a plurality of selection button units corresponding to each storage medium reproducing unit are further provided to reproduce the storage medium reproducing unit in which a desired portable storage medium is inserted among the plurality of storage medium reproducing units. .

The file system structure is configured according to the Universal Disc Format (UDF), and the storage medium reproducing unit includes an audio reproducing application for recognizing and processing a portable storage medium according to the file system of the Universal Disc Format (UDF). When a portable storage medium is inserted in the playback unit, the portable storage medium is read to check the file system and file structure. When the portable storage medium is recognized as a universal disk format (UDF) file system and a UDF DVD-VIDEO file format, Specific area data of the portable storage medium is configured to be automatically executed. In addition, the file structure according to the file system is composed of a file structure in the form of UDF DVD-VIDEO format including one or more of an audio TS directory and a video TS directory. One or more song data is recorded in stereo uncompressed PCM audio in either bit 96 ms or 24-bit 48 ms.

Portable storage media include one or more of the title, album information, jacket image, artist information in the data storage area, and the portable storage media may also include MMC cards, CF cards, XD cards, smart media cards, and SD. The card, mini SD card, micro SD card, SM card, memory stick of one of the appearance and physical characteristics are implemented.

Audio data in an uncompressed PCM form is recorded as the audio data, and the file system structure includes a track representing the audio data and track positional information corresponding to the positional information of the audio data.

Car audio system provided with a semiconductor memory-based storage medium for providing high-quality uncompressed audio according to the present invention,

First, it is possible to provide high-quality uncompressed music data of 24-bit 48㎑ or 96 에 in a portable storage medium, which is an external semiconductor, and provide superior sound quality than MP3 or CD.

Second, by recognizing the portable flash memory in the DVD-VIDEO format, any type of DVD device can play the sound source contained in the storage medium of the present invention.

Third, by reproducing audio data through a portable storage medium, which is relatively smaller than conventional cassette tapes and audio CDs, the main body of the car audio system can be implemented relatively less than the existing ones, so that the space inside the car can be efficiently utilized. There is an advantage.

Fourth, there is no need for an audio decoder, so royalty-related problems do not occur, and there is a secondary effect that can be played on various portable digital devices including a mobile phone with a simple software modification.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a car audio system provided with a semiconductor memory-based storage medium for providing a high quality uncompressed audio according to an embodiment of the present invention, a semiconductor memory for providing a high quality uncompressed audio according to the present invention Car audio system having a portable storage medium based on the audio system is provided with a audio player, the storage medium reproducing unit 40, the portable storage medium 41, the audio data is stored is inserted and reproduced; And a liquid crystal display unit 50 which displays the reproduction information of each audio data in real time. The portable storage medium 41 is connected to the storage medium reproducing unit 40 and is connected to the storage medium reproducing unit 40. And a contact portion 41a in which data is moved between the internal data storage region and the internal data storage region, and a data storage region 41b having a memory address assigned to each data storage space. Recorded in a specific area, including a volume structure that defines the physical medium as usable space, and a file structure that defines the layout of directories and files hierarchically. File system structure identified; One or more audio data arranged in accordance with the file system structure.

It is desirable to implement the volume of the car audio (1) relatively smaller than the existing car audio to effectively utilize the space of the interior of the car.

2 is an installation state diagram showing a car audio system equipped with a semiconductor memory-based storage medium for providing high-quality uncompressed audio according to another embodiment of the present invention, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a perspective view of an operation part of a car audio system provided with a semiconductor memory based storage medium for providing high quality uncompressed audio according to an embodiment of the present invention, and FIG. 4 is a high quality uncompressed according to another embodiment of the present invention. A perspective view of a control unit of a car audio system provided with a semiconductor memory-based storage medium for providing audio, which is closed and reproduced. An audio CD 11 in which audio data is stored in a car audio main unit 1a as necessary. CD playback unit 10 is inserted and played; A cassette playback unit 20 into which a cassette tape 21 storing audio data is inserted and reproduced; The FM / AM receiver for outputting the over-the-air modulated signal received through the car antenna can be configured to further include, of course.

As shown in FIG. 4, audio data input from each of the CD player 10, the cassette player 20, the FM / AM receiver, and the storage medium player 40 is controlled by the car audio 1 operation unit. The playback unit is operated by the operation of the mode button unit 45 corresponding to each of the CD playback unit 10, the cassette playback unit 20, the FM / AM receiver, and the storage medium playback unit 40 provided in (1b). do.

As shown in FIG. 1 and FIG. 4, the storage medium reproducing unit 40 is formed in a plurality of slots, and a target portable storage medium 41 of the plurality of storage medium reproducing units 40 is formed. A plurality of selection button units 42 corresponding to each storage medium reproducing unit 40 are further provided to regenerate the inserted storage medium reproducing unit 40.

When the portable storage medium 41 is inserted into each of the plurality of storage medium reproducing units 40 formed in the slot form, a desired selection button unit among the plurality of selection button parts 42 corresponding to the storage medium reproducing unit 40, respectively. When 42 is pressed, the storage medium reproducing unit 40 corresponding thereto is operated, and the plurality of audio data stored in the portable storage medium 41 inserted into the operating storage medium reproducing unit 40 is stored in the car audio 1. By clicking on the pair of switching button sections 43 provided on the operation unit 1b, the target audio data can be moved and played back.

The method of connecting the portable storage medium 41 to the storage medium reproducing unit 40 is to slide the portable storage medium 41 into the slot of the storage medium reproducing unit 40 to slide the contact portion 41a of the portable storage medium 41. ) Is connected to the storage medium reproducing unit 40, and when the extractor 44 provided on one side of the storage medium reproducing unit 40, which is the front of the main body unit 1a of the car audio 1, is pressed, the storage medium reproducing unit ( The portable storage medium 41 inserted into the slot of 40 is collectively separated from the slot of the storage medium reproducing unit 40, thereby disconnecting the connection with the storage medium reproducing unit 40 (Figs. 1, 3 and 4). Reference numeral 46 denotes a power button unit for supplying and cutting off power to the car audio.

FIG. 5 is a schematic view showing the overall configuration of the portable storage medium according to the present invention and the physical pictures of various flash memories used as the portable storage medium. [A] of FIG. 5 is according to the present invention. The overall structure of a portable storage medium based on semiconductor memory for providing high quality uncompressed audio.

Portable storage medium 41 is composed of a semiconductor memory-based storage medium that can be inserted into a computer, laptop, mobile phone, music player, car audio system, and the like. Accordingly, a contact portion 41a connected to the storage medium reproducing unit 40 and moving with the internal data storage area is provided, and a data storage area with a memory address assigned to each data storage space in the portable storage medium 41. 41b is provided.

The portable storage medium 41 does not have its own controller as in a USB memory. Therefore, the storage medium reproducing unit 40 is solely responsible for the control process of reading the portable storage medium 41.

However, unlike RAM, which is a volatile memory, a file system for efficiently managing the stored data is recorded in the portable storage medium 41.

In this case, instead of using a FAT file system used in a flash memory or a floppy disk, a file system used in an optical storage medium such as a DVD is used for the data storage area 41b of the portable storage medium 41. A typical example is the universal disk format (UDF) file system.

At this time, it is preferable to employ a UDF file system and have a file structure of a DVD-VIDEO format. This is to enable playback of the portable storage medium 41 in the form of a flash memory using a general DVD player or a DVD playback program of a PC. The file structure of the DVD-VIDEO format will be described in more detail later with reference to FIG. 7.

The file system of the optical storage medium is configured in such a manner that both a data-only medium and a readable medium can be managed. The file system has a volume structure and a file structure to manage data hierarchically.

The file system structure recorded in the data storage area 41b of the portable storage medium 41 is recorded in a specific area of the data storage area 41b and includes a volume structure that defines a physical medium as usable space, and a directory and file. It consists of a file structure that defines the layout hierarchically.

Then, the external device can determine the location information of the specific data through the volume structure and the file structure of the file system recorded on the portable storage medium 41.

The data storage area 41b of the portable storage medium 41 records one or more high-quality audio data arranged according to this file system structure. In this case, stereo PCM audio data having a 24-bit resolution in an uncompressed manner may be stored as the audio data.

That is, when the data storage area 41b of the portable storage medium 41 according to the present invention has a capacity of 1G byte, based on the same playback time as a standard audio CD having 650M bytes, a sample rate of 48 bits of 24 bits is used. Uncompressed digital audio data can be stored and stereo uncompressed PCM audio data having a sample rate of up to 24-bit 96kHz for 2G byte capacity and 24-bit 192kHz for 4G byte capacity.

Therefore, according to the present invention, by applying a file system used in an optical storage medium such as UDF instead of a FAT file system and using a DVD-VIDEO file structure, it is possible to record high-quality uncompressed PCM audio data intact. Data accessibility from external devices can be further improved.

As shown in FIG. 4, the above-described portable storage medium 41 may be mounted and used in a slot of the storage medium reproducing unit 40 provided in the car audio system. That is, the storage medium reproducing unit 40 is formed in a slot form in which the portable storage medium 41 can be mounted, and the storage medium mounted in the slot-type storage medium reproducing unit 40 is a universal disk format (UDF). It is provided with an audio playback application that recognizes and processes according to the file system.

In this case, a general DVD player or a multimedia DVD playback software installed in a PC may be used as the audio playback application of the storage medium playback unit 40 as it is.

That is, the portable storage medium 41 has a UDF file system and a file structure of a UDF DVD-VIDEO format described later with reference to FIG. 6 as described above. The portable storage medium 41 can be recognized as a DVD video medium and played back.

In addition, the storage medium reproducing unit 40 may be set to automatically execute the portable storage medium 41 by providing an automatic execution option.

The specific operation process for this is as follows. When the portable storage medium 41 is inserted into the slot-type storage medium reproducing unit 40 having the audio reproducing function of the car audio system, the storage medium reproducing unit 40 reads the portable storage medium 41 and the file system. Check the file structure. When the portable storage medium is recognized as a file system of the universal disk format (UDF) and a file structure of the UDF DVD-VIDEO format, data of a specific area of the portable storage medium 41 is automatically executed.

That is, the sound source stored in the portable storage medium is automatically played only by the user inserting the portable storage medium 41 into the storage medium player 40, which is automatically played when the DVD is inserted into the DVD player. It has the same effect as it does.

FIG. 5B is a real photograph photographing the appearance of various flash memories used as a portable storage medium.

The portable storage medium 41 includes an MMC card (multi-media card), a compact flash (CF) card, an extreme digital (XD) card, a smart media (SM), a secure digital (SD) card, a mini SD card, and a micro SD card. , Various types of flash memory such as a memory stick may be used.

In addition to the above-mentioned flash memory, all the semiconductor-based memory cards can be applied to the present invention.

6 is a diagram showing the arrangement of data according to the universal disk format (UDF) constituting the file system of the portable storage medium according to the present invention.

A volume recognition sequence (VRS) represents information representing one or more volume structures and corresponds to information that is first accessed in a process of recognizing a UDF file system.

The VDS (volume descriptor sequence) contains information indicating the volume structure of the storage medium, such as information about the contents of the volume constituting the storage medium and information about partitions for partitioning the volume. In addition, the location information of the FSD for accessing the file structure of the storage medium can be calculated through the information stored in the VDS.

The AVDP (anchor volume descriptor pointor) contains the position information of the VDS described above and is recorded at a specific position called an anchor point in the data storage area. The anchor point points to logical sector 256 and the last logical sector in the data storage area. Thus, if only one of the two anchor points is read, the AVDP can be read.

A file set descriptor (FSD) contains information about files and directories on the volume. In other words, the hierarchical directory can be searched through the information stored in the FSD to access a file to be played on an external device.

In addition, uncompressed PCM-type audio data and other data containing sound source information are stored in the remaining area of the data storage area.

In this case, the track position information may be further included in the UDF file system in order to recognize the song corresponding to the audio data as the track information in the external playback apparatus. That is, the track position information includes information in which the track representing the audio data and the position information of the audio data correspond to each other, and may be achieved through a virtual allocation table (VAT) provided by a specific version of the UDF. Accordingly, the external playback apparatus can find the actual position of the track corresponding to each song through the track position information in the data storage area and read the corresponding audio data.

In addition, the UDF bridge format may be used for the case where the external device has a limitation in recognizing the DVD medium. The portable storage medium in this case has a multiple structure of a file system according to ISO 9660 standard and a UDF file system suitable for DVD.

7 illustrates the structure of files and directories of a storage medium having a file structure of a UDF DVD-VIDEO format.

In order to record high-quality uncompressed PCM audio data on a portable storage medium according to the present invention so that it can be played through a general music player, it is preferable to use the UDF DVD-VIDEO format. In this case, a high quality sound source can be played through a general DVD player or a DVD playback application.

The file structure according to the DVD-VIDEO format generally has a structure in which an audio TS directory and a video TS directory are formed in a root directory. Also, IFO, BUP, and VOB files are arranged in the video TS directory. In this case, the BUP file means a backup file for the IFO file, and the IFO file contains information on chapters, sub tracks, and audio tracks. The VOB file contains the actual video, audio subtitles, and menu contents.

However, in the present invention, since the main purpose is to play music data, it is not meaningful to actually have a video TS directory. However, in order to recognize the portable storage medium according to the present invention as a DVD-VIDEO medium in a general DVD player device, it is desirable to maintain such a basic file structure. In particular, it is desirable to maintain this minimal configuration since player devices that play DVD-VIDEO media are generally implemented to first recognize VIDEO_TS.IFO files located in the video TS directory.

In some cases, if a technical standard corresponds between the playback device and the storage medium, it is possible not to include any one directory. In other words, the file structure of the portable storage medium has a file structure in the form of a DVD-VIDEO format including one or more of an audio TS directory and a video TS directory.

Stereo uncompressed PCM audio data is stored in at least one of the audio TS directory and the video TS directory. At this time, it is preferable that the audio data is recorded with one or more pieces of song data in 24-bit 48 kHz or 96 kHz stereo uncompressed PCM audio. This provides a much higher sound quality than the 16-bit 44.1 오디오 audio provided by conventional CD media.

In addition, in filling a high-quality audio data into a portable storage medium in the form of a flash memory according to the present invention, the above-mentioned file structure is in the form of a DVD-VIDEO format, but the present invention mainly provides audio data. DVD-VIDEO bandwidth is filled with high quality audio data.

That is, the video video data may be set to have no or no use at all, and by using the remaining storage space as the audio data storage space, a larger amount of high-quality audio data may be filled.

In addition, the data storage area of the portable storage medium may store music titles, album information, jacket images, artist information, etc. in addition to high-quality audio data as features provided in the DVD-VIDEO format.

8 is a flowchart illustrating a process of recognizing a storage medium of a UDF DVD-VIDEO format by a DVD player.

First, the ECMA 167 descriptor is found and recognized from the VRS region corresponding to the position of the logical sector 16 in the portable storage medium 41 (S10).

Next, the AVDP located at the anchor point is found to obtain position information of the VDS (S20). The anchor point is located in logical sector 256 and the last logical sector. Therefore, you only need to find one of the two locations, and usually only logical sector 256.

Next, the VDS is read by referring to the position information of the VDS identified above, and the partition information constituting the volume and the position information of the FSD for accessing the file structure are obtained therefrom (S30).

By reading the FSD, the position information of the FE (file entry) indicating the ROOT directory is obtained (S40).

The location information of the ROOT directory is obtained by reading the FE representing the ROOT directory (S50).

Next, you can get information about the subdirectories of the ROOT directory by accessing the ROOT directory and parsing the contents of the ROOT directory. That is, the FID indicating the VIDEO_TS directory which is a subdirectory is found from the parsing result (S60). In the FID representing the VIDEO_TS directory, location information of the FE representing the VIDEO_TS directory is stored.

The FE representing the VIDEO_TS directory is read to obtain location information of the VIDEO_TS directory (S70).

Next, by accessing the VIDEO_TS directory and parsing the contents of the VIDEO_TS directory, information on subdirectories or files included in the VIDEO_TS directory can be obtained. That is, in this case, the FID indicating the VIDEO_TS.IFO file to be checked first is found (S80). The FID representing the VIDEO_TS.IFO file stores the location information of the FE representing the VIDEO_TS.IFO file.

The FE representing the VIDEO_TS.IFO file is read to obtain location information and other information of the VIDEO_TS.IFO file (S90).

Through this process, the DVD player first recognizes the VIDEO_TS.IFO file located in the VIDEO_TS directory from the storage medium of the UDF DVD-VIDEO format. In addition, other files are read through the above process (S100).

9 is a diagram illustrating in more detail the process of reading a file structure and a VIDEO_TS.IFO file according to the UDF DVD-VIDEO format.

In the UDF file system, the file structure is a hierarchical structure of file entries (FEs) representing directories and files, starting from the root directory, and each FE is a file identifier that provides location information for subdirectories or files. It can be accessed through a descriptor.

In this case, according to the general UDF file system structure, the location of the data is not directly recorded in the FID, but instead, the location of the information control block (ICB) is recorded to access the data through the ICB. In other words, data such as data length, position, and attribute are recorded in the ICB.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may various modifications and variations without departing from the essential characteristics of the present invention. .

1 is a perspective view showing a car audio system equipped with a semiconductor memory-based storage medium for providing high-quality uncompressed audio according to an embodiment of the present invention;

2 is an installation state diagram showing a car audio system equipped with a semiconductor memory-based storage medium for providing high-quality uncompressed audio according to another embodiment of the present invention.

3 is a perspective view of an operating part of a car audio system provided with a semiconductor memory-based storage medium for providing high-quality uncompressed audio according to another embodiment of the present invention from an open body;

4 is a perspective view of a state in which an operation unit of a car audio system equipped with a semiconductor memory-based storage medium for providing high-quality uncompressed audio according to another embodiment of the present invention is closed and reproduced;

5 is a physical picture of the overall configuration of the portable storage medium according to the present invention and the appearance of various flash memories used as the portable storage medium;

6 is a diagram showing the arrangement of data according to the universal disk format (UDF) constituting a file system of a portable storage medium according to the present invention;

7 is a diagram showing the structure of files and directories of a storage medium having a file structure of a UDF DVD-VIDEO format;

8 is a flowchart illustrating a process in which a DVD player recognizes a storage medium of a UDF DVD-VIDEO format.

9 is a diagram illustrating in more detail a file structure according to the UDF DVD-VIDEO format and a process of reading a VIDEO_TS.IFO file.

※ Explanation of symbols for main parts of drawing

1: car audio 1a: main body

1b: control panel 10: CD player

11: audio CD 20: cassette player

21: cassette tape 40: storage medium playback unit

41: portable storage medium 41a: contact portion

41b: Data storage area 42: Selection button part

43: switch button 44: extractor

45: mode button portion 46: power button portion

Claims (8)

In a car audio system equipped with an audio player, A storage medium reproducing unit 40 in which a portable storage medium 41 storing audio data is inserted and reproduced; And a liquid crystal display unit 50 for displaying the reproduction information of the audio data in real time. The portable storage medium 41 is connected to the storage medium reproducing unit 40 and has a contact portion 41a for moving data between the storage medium reproducing unit 40 and the internal data storage area, and a memory address for each data storage space. Is based on a semiconductor memory configured to include an allocated data storage area 41b, In the data storage area 41b, A volume structure recorded in a specific area and defining a physical medium as usable space, and a file structure hierarchically defining the arrangement of directories and files, and location information of specific data through the volume structure and the file structure. File system structure to be identified; One or more audio data arranged in accordance with the file system structure; Car audio system provided with a portable storage medium based on semiconductor memory for providing high-quality uncompressed audio, characterized in that comprising a. The method according to claim 1, The storage medium reproducing unit 40 is a car audio system provided with a portable storage medium based on a semiconductor memory for providing a high quality uncompressed audio, characterized in that formed in a plurality of slots. The method according to claim 2, A plurality of selection button units corresponding to each of the storage medium reproducing units 40 for reproducing the storage medium reproducing unit 40 into which the desired portable storage medium 41 is inserted among the plurality of storage medium reproducing units 40. Car audio system, characterized in that the 42 is further provided. The method according to any one of claims 1 to 3, The file system structure is configured according to the universal disk format (UDF), and the storage medium reproducing unit 40 recognizes and processes the portable storage medium 41 according to the file system of the universal disk format (UDF). When an audio playback application is provided and the portable storage medium 41 is inserted into the storage medium reproducing unit 40, the portable storage medium 41 is read to check a file system and a file structure, and the portable storage medium 41 is read. ) Is recognized as a file system of the universal disk format (UDF) and the file structure of the UDF DVD-VIDEO format, the specific region data of the portable storage medium 41 is automatically executed. A portable storage medium based on semiconductor memory. The method according to claim 4, The file structure according to the file system comprises a file structure in the form of a UDF DVD-VIDEO format including one or more of an audio TS directory and a video TS directory. Providing high quality uncompressed audio, wherein at least one piece of song data is recorded in at least one of the audio TS directory and the video TS directory as one of 24-bit 96 kHz and 24-bit 48 kHz. A portable storage medium based on semiconductor memory. The method according to claim 5, The portable storage medium 41 includes at least one of a music title, album information, a jacket image, and musician information in the data storage area 41b as a feature. Memory based portable storage media. The method according to claim 6, The portable storage medium 41 is implemented to have the physical characteristics of one of the MMC card, CF card, XD card, smart media card, SD card, mini SD card, micro SD card, SM card, memory stick. A portable storage medium based on semiconductor memory for providing high quality uncompressed audio. The method according to claim 5, As the audio data, audio data in the form of uncompressed PCM is recorded. The file system structure may include track position information in which tracks representing the audio data and position information of the audio data are associated with each other. The semiconductor memory-based portable storage medium for providing high-quality uncompressed audio.

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