KR20110079155A - Semiconductor memory based mobile storage medium for providing object-oriented audio, and audio playing system using the storage medium - Google Patents

Abstract

PURPOSE: A semiconductor memory based mobile storage medium for providing object-oriented audio is provided to reproduce high quality external sound source by reading sound data through a memory slot. CONSTITUTION: A contact unit connected to the external device transfers data between an external data storage area and an internal data storage area. A data storage area(12) comprises data storage area in which memory address is allocated. The data storage area comprises a volume structure which defines a physical media as an available space and a file structure which hierarchically defines the arrangement of a directory and file. The data storage area comprises a file system structure which recognizes location information of a specific data through the file structure and the volume structure.

Description

Semiconductor-based portable storage media for providing object-oriented audio and audio playback system using the same

According to the present invention, a music 2.0 encoded sound source file supporting object-oriented sound source encoding is configured to be compatible with the DVD data format and the Blu-ray data format, and the sampling rate is adjusted according to the number of channels of the sound source and the storage capacity of the portable storage medium. The present invention relates to a portable storage medium based on a semiconductor memory for providing object-oriented audio and an audio reproduction system using the same, particularly to a portable external semiconductor storage medium such as a UDF (Universal Disk Format) or BD-ROM used in an optical storage medium. Provides audio data by applying a file system and has a file structure of a DVD-VIDEO format or BD-ROM, and adjusts the sampling rate of sound sources in consideration of the number of sound source channels and the storage capacity of a portable storage medium, Audio in portable flash memory by providing To techniques for playback by recognizing the data in the same manner as the DVD or the BD-ROM.

Recently, MP3 compression has been widely used as a method of providing 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.

SUMMARY OF THE INVENTION An object of the present invention is to provide an external semiconductor storage medium capable of storing high quality uncompressed music data and an audio reproduction system for recognizing and processing such storage medium as if playing a DVD or BD-ROM.

It is also an object of the present invention to provide a technology for reproducing a high quality external sound source in a device such as a notebook computer having only a memory slot without a drive capable of recognizing an optical medium.

A portable storage medium based on a semiconductor memory for providing object-oriented audio according to the present invention includes a contact portion connected to an external device to move data between an external device and an internal data storage area, and a memory address assigned to each data storage space. A semiconductor memory-based portable storage medium including a data storage area. A data storage area includes a volume structure that is recorded in a specific area and defines a physical medium as usable space, and a directory and file arrangement hierarchically. A file system structure including a defining file structure, wherein a location information of specific data is identified through a volume structure and a file structure; And one or more audio data arranged according to a file system structure, wherein the audio data includes a plurality of sound source sources separated by objects, and one or more of a plurality of channels provided in a DVD-VIDEO format or a BD-ROM format. Each of the plurality of sound source sources in the set is configured to be stored in the sound source file.

In addition, in a semiconductor memory-based portable storage medium for providing object-oriented audio according to the present invention, the file system structure may be configured according to any one of a universal disk format (UDF) and a Blu-ray disk file system (BDFS). It is desirable to have.

In addition, the audio data according to the present invention is configured to adjust the sampling rate and the number of quantization bits in consideration of the data storage capacity of the portable storage medium and the number of channels in the multi-channel sound source information.

In addition, the file structure according to the file system in the semiconductor memory-based portable storage medium for providing object-oriented audio according to the present invention is UDF DVD-VIDEO format and BDFS BD- including one or more of the audio TS directory and the video TS directory It consists of a file structure in the form of any one of the ROM formats, and one or more song data is recorded in one or more areas of the file structure as stereo uncompressed PCM audio of either 24-bit 96 'or 24-bit 48'. It is preferable.

In addition, the semiconductor memory-based portable storage medium for providing object-oriented audio according to the present invention preferably comprises at least one of a music title, album information, jacket image, musician information in the data storage area as a feature (feature). .

In addition, the semiconductor memory-based portable storage medium for providing object-oriented audio according to the present invention is MMC card, CF card, XD card, smart media card, SD card, mini SD card, micro SD card, SM card, memory It is preferred that one of the sticks is implemented to have the appearance, physical properties.

An audio reproducing system using a semiconductor memory-based portable storage medium for providing object-oriented audio according to the present invention includes a memory for each contact and data storage space, which is connected to an external device and moves data between the external device and the internal data storage area. A semiconductor memory-based portable storage medium comprising addressed data storage. A data storage area has a hierarchical structure of directory and file volumes, volume structures that are recorded in a specific area and define physical media as available space. A file system structure including a file structure defined by a file structure and a location information of specific data identified through a volume structure and a file structure, and data storage capacity of a portable storage medium arranged according to the file system structure, and multi-channel sound source information. Sampling Considering Number of Channels A portable storage medium including one or more pieces of audio data whose rate and number of quantization bits are adjusted; And a memory slot into which a portable storage medium can be mounted, and which recognizes and processes the storage medium mounted in the memory slot according to any one of a universal disk format (UDF) and a Blu-ray disk file system (BDFS). It has a playback application, and when a portable storage medium is inserted into the memory slot, the portable storage medium is read to check the file system and file structure, and the portable storage medium is a UDF DVD-VIDEO format file system. An audio reproducing apparatus for automatically executing data of a specific area of a portable storage medium when the file structure and the file structure of any one of a Blu-ray Disc file system (BDFS) and a BDFS BD-ROM format are recognized as a file structure and a file structure; It is configured to include.

According to the present invention, it is possible to provide high-quality music data of 24-bit 48 kHz or 96 kHz in a portable external semiconductor storage medium, thereby providing sound quality superior to that of MP3 or CD.

In addition, by recognizing the portable flash memory in the DVD-VIDEO format or BD-ROM format, any type of DVD device or BD-ROM device can reproduce the sound source contained in the storage medium of the present invention.

In addition, since there is no need for an audio decoder, royalty-related problems do not occur, and simple software modifications can be played on various portable digital devices including mobile phones.

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

1 (A) is an overall configuration diagram of a portable storage medium based on a semiconductor memory for providing object-oriented audio according to the present invention.

The portable storage medium 10 includes a semiconductor memory-based storage medium that can be inserted into an external device such as a computer, a notebook, a mobile phone, a music player, and the like. Accordingly, a contact portion 11 connected to an external device to move data with the internal data storage area is provided, and a data storage area 12 having a memory address assigned to each data storage space is provided inside the portable storage medium 10. It is provided.

The portable storage medium 10 does not have its own controller as in a USB memory. Therefore, it is solely responsible for the control process of reading the portable storage medium 10 from the external device.

However, unlike RAM, which is a volatile memory, a file system for efficiently managing stored data is recorded in the portable storage medium 10.

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 12 of the portable storage medium 10. 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 the portable storage medium 10 in the form of a flash memory to be played 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. 3.

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 12 of the portable storage medium 10 is recorded in a specific area of the data storage area 12 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 10.

Finally, the data storage area 12 of the portable storage medium 10 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, if the data storage area 12 of the portable storage medium 10 according to the present invention has a capacity of 1 Gbyte based on the same playback time as a standard audio CD having 650 M bytes, a sample rate of 24 bits of 48 ㎑ is required. 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.

In addition, according to the present invention, by applying a file system used in a Blu-ray optical storage medium such as a BDFS (Bluray Disc File System) instead of a FAT file system, and using a BD-ROM file structure, high-quality uncompressed audio is not damaged. It can record PCM audio data and make the data more accessible from external devices.

FIG. 1B is a block diagram of an audio reproduction system using the portable storage medium of FIG. 1A according to the present invention.

The portable storage medium 10 described above may be mounted and used in the memory slot 21 of the external device 20 such as a computer, a notebook, a mobile phone, a music player, and the like.

That is, the external device 20 includes a memory slot 21 for mounting a portable storage medium, and recognizes a storage medium mounted in the memory slot 21 according to a file system of a universal disk format (UDF). And an audio reproduction application for processing.

In this case, as an audio playback application of the external device 20, a general DVD player or a multimedia DVD playback software installed in a PC may be used as it is.

That is, the portable storage medium 10 has a file structure of a UDF file system and a UDF DVD-VIDEO format described later with reference to FIG. 3 as described above. The portable storage medium 10 can be recognized as a DVD video medium and played back.

In addition, the external device 20 may be set to automatically execute the portable storage medium 10 by providing an automatic execution option.

The specific operation process for this is as follows. When the portable storage medium 10 is inserted into the memory slot of the external device 20 having an audio playback function such as a DVD player, the external device 20 reads the portable storage medium 10 to check the file system and the file structure. do. When the portable storage medium is recognized as a file system of a universal disk format (UDF) and a file structure of a UDF DVD-VIDEO format, data of a specific area of the portable storage medium 10 is automatically executed.

In other words, the user can insert the portable storage medium 10 into the memory slot 21, and the sound source stored in the portable storage medium is automatically played. This is similar to the case where the DVD is automatically played when the DVD is inserted into the DVD player. Has the same effect.

In another embodiment, the external device 20 includes a memory slot 21 for mounting a portable storage medium, and recognizes and processes a storage medium mounted in the memory slot 21 according to a file system of a BDFS. It has a playback application. Here, as an audio reproduction application of the external device 20, a general Blu-ray player or Blu-ray reproduction software installed in a PC may be used.

The portable storage medium 10 has a BDFS file system and a file structure of a BDFS BD-ROM format described later with reference to FIG. 10 can be recognized and played back as a Blu-ray storage medium.

1 (C) is a diagram showing the appearance of various flash memories used as the portable storage medium of FIG. 1 (A).

The portable storage medium 10 may include 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.

2 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.

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.

3 is a diagram showing 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. Here, the uncompressed PCM-type audio data includes multi-channel sound source information divided by vocals and musical instruments. The sound source information of the multi-channel is coded by allocating each channel to an object-oriented object of a sound source that is divided into vocals and a plurality of musical instruments.

Music 2.0 is disclosed as a technique of allocating and coding respective channels for each object of a sound source. Music 2.0 is a technology jointly developed by Entry and Audition, which assigns and encodes a channel for each sound source for a different sound source object for each vocal and a plurality of instruments. In Music 2.0, object-based sound sources are encoded differently from source to source, thereby having multiple sound source channels.

Since the sound source file to which the music 2.0 technology is applied includes a plurality of sound source channels, the number of audio channels supported by the DVD standard may not be able to accommodate all of the sound source channels included in the music 2.0 sound source file. The DVD standard audio channel is 5.1 channel and supports center, left, right, rear left, rear light and woofer. This means that 6 audio channels can be supported by the DVD standard. There is a technical limitation that a sound source file encoded by Music 2.0 can not have more than 6 channels. One solution to overcome this is to configure a plurality of sound source information by storing 6 sound source information in one or more sets in addition to the sound source file when the number of channels of the music 2.0 sound source exceeds 6. When a sound source file configured as described above is played back in a general DVD player, a 5.1 channel audio signal is output corresponding to six sound source codes coded for each sound source object. As a result, the DVD optical storage medium has a problem in that music files encoded with Music 2.0 cannot be played correctly. Accordingly, the sound source file encoded with Music 2.0 is preferably played back in a dedicated player or a dedicated playback application.

The data capacity of the multi-channel sound source information varies depending on the number of quantization bits, the sampling rate, and the number of channels. This means that the sampling rate and the number of quantization bits corresponding to the number of channels in the sound source information of the multi-channel are changed in consideration of the data storage capacity of the portable storage medium. As the number of channels of sound source information increases, the sound source coding apparatus adjusts the sampling rate and the number of quantization bits low so that the total data capacity does not exceed the data storage capacity of the portable storage medium. On the contrary, when the number of channels of sound source information decreases, the sound source coding apparatus adjusts the sampling rate and the number of quantization bits appropriately so that high-quality audio data is generated while adjusting the total data capacity so as not to exceed the data storage capacity of the portable storage medium. .

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.

4 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 (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).

FIG. 5 is a diagram illustrating in detail a file structure and a process of reading 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.

FIG. 6 is a diagram showing the arrangement of data according to a Blu-ray Disc File System (BDFS) constituting a file system of a portable storage medium according to the present invention.

The BDFS file system format includes a management information area (MIA), an anchor information area (AIA) and real time files and general file data.

The Management Information Area (hereinafter referred to as MIA) has file system control information for files and directories, and is divided into two main management information areas (main MIA) and reserved management information area (reserved MIA) on the disk. The dog is recorded. The management information area MIA is recorded in the 84479 LBN address area at the 35328 logical block number (abbreviated as LBN) address on the disk. LBN is generally a sector unit. More specifically, in addition to file system control information for files and directories, files of Group 1, Group 2, and Group 3 classified into three types may be recorded in the management information area MIA. Further, a group 4 file is recorded in an area of addresses 84489 LBN to 92671 LBN on the disk next to the reservation management information area. In the group 1 and the group 2, a playlist file, a clip information file, and the like are recorded as files for navigation. In the group 3 and the group 4, image files such as thumbnail navigation data and a menu are recorded. Specifically, groups 1 to 4 include info.bdav, menu.tidx, menu.tdt1, menu.tdt2, mark.tidx, mark.tdt1, mark.tdt2, real playlist, and virtual playlist. Files such as a playlist and clip information may be recorded.

On the other hand, the anchor information area AIA includes information indicating the position of the management information area MIA recently updated. The anchor information area AIA is recorded at the beginning and the end of the disc.

On the other hand, real-time file and normal file data is the location where the real video file or other normal data file is recorded. The address area corresponding to the address 92672 LBN on the disk minus 35329 LBN from the last LBN. Is written on.

7 is a diagram showing the structure of files and directories of a storage medium having a file structure of a BDFS BD-ROM format.

The BD-ROM data has a "BDMV" directory in the root directory, and the "BDMV" directory includes a "PLAYLIST" directory, a "CLIPINF" directory, a "STREAM" directory, an "AUXDATA" directory, and a "BACKUP" directory.

The "BDMV" directory contains a "index.bdmv" file containing the contents of the "BDMV" directory and a "MovieObject.bdmv" file containing information about one or more movie objects.

The "PLAYLIST" directory stores playlist files of the form "xxxxx.mpls" containing information about movie playlists.

The "CLIPINF" directory stores clip files of "zzzzz.clpi" type that contain clip information corresponding to the AV stream file.

The "STREAM" directory stores AV stream files of the form "zzzzz.m2ts" containing video, audio, graphics, and text subtitles. That is, data corresponding to the actual video content is stored. The clpi file and the m2ts file correspond to each other with files of the same name, and the clpi file contains clip information about the m2ts file. The AV stream file stores high-quality uncompressed PCM audio data according to the present invention. A typical Blu-ray player or Blu-ray playback software on a PC accesses an AV stream file stored in the "STREAM" directory when a portable storage medium formatted in BDFS BD-ROM format is inserted to decode and play uncompressed PCM audio data. Here, the uncompressed PCM audio data includes multi-channel sound source information distinguished by vocals and musical instruments. The PCM audio channels with 48 and 96 kHz sampling rates supported by the BD-ROM standard are 8 channels, and multichannel sound source information is stored in each channel. When the number of channels of the sound source information exceeds 8, a plurality of sound source information is configured by storing 8 sound source information as a set in addition to the sound source file.

The multi-channel sound source information has a data capacity that varies depending on the number of quantization bits, the sampling rate, and the number of channels of the sound source. This means that the sampling rate and the number of quantization bits corresponding to the number of channels in the sound source information of the multi-channel are changed in consideration of the data storage capacity of the portable storage medium. As the number of channels of sound source information increases, the sound source coding apparatus adjusts the sampling rate and the number of quantization bits low so that the total data capacity does not exceed the data storage capacity of the portable storage medium.

In the "AUXDATA" directory, files for sounds and fonts are stored. In the "BACKUP" directory, copies of the files stored in each directory are stored.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be construed as being included in the scope of the present invention.

1 (A) is an overall configuration diagram of a portable storage medium based on a semiconductor memory for providing object-oriented audio according to the present invention;

1 (B) is a block diagram of an audio reproduction system using the portable storage medium of [1 (A)] according to the present invention;

1 (C) is a view showing the appearance of various flash memories used as the portable storage medium of FIG. 1 (A),

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

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

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

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

FIG. 6 is a diagram showing the arrangement of data according to a Blu-ray Disc File System (BDFS) 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 BDFS BD-ROM format.

Claims (7)

A semiconductor memory based portable storage medium comprising a contact portion connected to an external device to move data between the external device and an internal data storage area, and a data storage area in which a memory address is allocated to each data storage space. In the data storage area, 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; And One or more audio data arranged in accordance with the file system structure; The audio data includes a plurality of sound source sources divided by objects, and an object configured to record the plurality of sound source sources in one or more sets of a plurality of channels provided in a DVD-VIDEO format or a BD-ROM format, respectively, and store the plurality of sound source files in a sound source file. A portable storage medium based on semiconductor memory for providing directional audio. The method according to claim 1, The file system structure is a semiconductor memory-based portable storage medium for providing object-oriented audio, characterized in that the file system has a configuration according to any one of the universal disk format (UDF) and Blu-ray Disc file system (BDFS). . The method according to claim 2, The audio data may be configured to adjust the sampling rate and the number of quantization bits in consideration of the data storage capacity of the portable storage medium and the number of channels in the multi-channel sound source information. media. The method of claim 3, The file structure according to the file system includes a file structure having any one of a UDF DVD-VIDEO format and a BDFS BD-ROM format including one or more of an audio TS directory and a video TS directory. Portable memory-based portable device for providing object-oriented audio, characterized in that at least one piece of song data is recorded in one or more regions of the file structure as uncompressed PCM audio of any one of 24-bit 96 'and 24-bit 48'. Storage medium. The method according to claim 4, The portable storage medium may include at least one of a music title, album information, a jacket image, and artist information in the data storage area as a feature. . The method according to claim 5, The portable storage medium is implemented to have the appearance and 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 object-oriented audio. The portable storage medium of claim 2; And A memory slot for mounting the portable storage medium, and recognizing and processing the storage medium mounted in the memory slot according to any one of a universal disk format (UDF) and a Blu-ray disk file system (BDFS). An audio playback application, and when the portable storage medium is inserted into the memory slot, the portable storage medium is read to check a file system and a file structure, and the portable storage medium is a UDF DVD system and a file system of a universal disk format (UDF). When the file structure of the VIDEO format and the file system and file structure of the Blu-ray Disc file system (BDFS) or the BDFS BD-ROM format are recognized as the file structure, the data of the specific area of the portable storage medium is automatically displayed. An audio player for executing; Audio playback system using a semiconductor memory-based portable storage medium for providing an object-oriented audio comprising a.

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