KR100911130B1 - Contents playing device using direct access, and method for the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a content reproduction technology, and more particularly, to a content reproduction technology in which a specific area of a hard disk is managed to store and read digital content data through direct access without a file system. It is about. According to the present invention, since a space for quickly storing and reproducing a large amount of data is provided inside the digital content reproducing apparatus, it is used to implement a time shift function for reproducing a broadcast at a high speed when applied to the reproduction of broadcast data received in real time. It can be effective.

File system, Hard disk, Memory card, Direct access, Digital broadcasting

Description

Contents playing device using direct access, and method for the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a content reproduction technology, and more particularly, to a content reproduction technology in which a specific area of a hard disk is managed to store and read digital content data through direct access without a file system. It is about.

Permanent mass storage devices such as hard disks, SD memory cards, and MMC memory are generally managed by file systems such as FAT32 and NTFS, and are stored in the form of files belonging to hierarchical directories when storing data.

In the FAT32 file system, a single cluster is formed by grouping sectors, which are the minimum units for storing data on a hard disk, into a single unit, and assigns and manages one address. In general, in the case of an 8 Gbyte hard disk, one cluster has a size of 4096 bytes, which corresponds to 8 sectors (1 sector = 512 bytes).

At this time, the data storage by the file system is made in units of clusters, so even if the size of data stored in one cluster is very small compared to the size of the cluster, the remaining space of the cluster is simply left empty. Stored in a cluster.

1 is an exemplary view illustrating a method of storing data on a hard disk according to the prior art.

As shown, each cluster is not placed in physically contiguous spaces, but is interspersed in various spaces of the hard disk and memory card during data recording and erasing. Therefore, after reading all the clusters in the process of reading data, the cluster chain information of the corresponding file stored in a specific space of the hard disk and the memory must be known to know the cluster number of the next cluster.

As such, when data is managed using a file system, a large amount of data can be managed systematically, while various steps are required for file storage and reading, which makes it difficult to achieve rapid operation.

In addition, in order to store a large amount of data in a portable broadcasting content reproducing apparatus such as a mobile broadcasting receiving apparatus, a large capacity storage device such as a hard disk and a memory card needs to be installed. Since the mass storage device is used for a specific purpose for storing and reproducing a single data rather than for general purpose, such as playing, there is a problem that it is difficult to implement fast operation for real-time viewing when data management is performed by the file system. .

In addition, in order to implement various functions such as not only simply playing the received digital content but also playing the broadcast at a high speed, a faster data input / output operation is required through the mass storage, so the data management method using the conventional file system is applied as it is. The problem is that it is very inefficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a content reproducing technique capable of quickly storing and reproducing data by storing and reading digital content data in a storage device such as a hard disk through direct access without going through a file system.

A content reproduction apparatus using direct access according to the present invention comprises: a decoder for decoding digital content data; A memory for storing digital content data decoded through a decoder; A storage device in which a specific area of the entire storage space is secured as a direct access area; An access control unit which checks the direct access area of the storage device and stores and reads the decoded digital content data stored in the memory in the direct access area; And a system controller for reproducing digital content data stored in a memory and receiving and reproducing digital content data from a direct access area of the storage device in response to an external control signal.

Content playback method using a direct access according to the present invention comprises the steps of setting a specific area of the entire storage space of the storage device as a direct access area; Decoding digital content data; Sequentially storing the decoded digital content data in a memory; Checking the direct access area in the storage device and storing the decoded digital content data stored in the memory in the direct access area; And reading and reproducing digital content data from a direct access area of the storage device in response to an external control signal.
Content playback apparatus using direct access according to the present invention, the decoder for decoding digital content data; A memory for storing digital content data decoded at the decoder; A hard disk device in which an entire storage space is divided into an area managed by a file system and a direct access area; An access control unit which checks the direct access area of the hard disk device and stores and reads the digital content data decoded by the decoder in the direct access area in a circular ring form; And providing access according to the file system of a general external storage device to an area managed by the file system of the hard disk device, and if a time shift input occurs while playing digital content data stored in the memory, And a system controller which reads and reproduces the digital content data from the direct access area of the hard disk device through the access controller.
In addition, in the content playback apparatus using the direct access according to the present invention, the access control unit divides the physical space corresponding to the direct access area of the hard disk device into specific block units and sequentially allocates virtual addresses in a contiguous order to form a circular ring. It is preferable to manage the data to be stored and read, and to sequentially store the decoded digital content data in a block corresponding to the allocated virtual address in the form of a circular ring.
In addition, in the content playback apparatus using the direct access according to the present invention, the system control unit stops the playback of the digital content data stored in the memory when the time shift start command is generated, and the virtual allocated by the access control unit when the time shift playback command is generated. Data is sequentially received from blocks in the hard disk device corresponding to the address in the order of virtual addresses, converted into video signals and audio signals, and outputted. When all data received from the hard disk device is played up to the present time, the hard disk device It is desirable to stop reading data from and resume playback of the decoded digital content data stored in the memory.

According to the present invention, since a space for quickly storing and reproducing a large amount of data is provided inside the digital content reproducing apparatus, it is used to implement a time shift function for reproducing a broadcast at a high speed when applied to the reproduction of broadcast data received in real time. It can be effective.

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

2 is a block diagram showing the overall configuration of the content reproducing apparatus 30 using direct access according to the present invention.

The content reproducing apparatus 30 includes a decoder 32, a memory 33, an access control unit 34, a storage device 35, and a system control unit 36, and includes a wireless receiving unit for receiving a wireless broadcast signal ( 31) may be added.

The radio receiver 31 receives a mobile radio broadcast signal such as digital radio broadcast or DMB, and extracts digital content data from the received signal.

The decoder 32 decodes the digital content data provided through the wireless receiver 31 or an additional input means. If the digital content data is encoded by a digital compression codec such as MPEG, the digital signal before compression is recovered by decoding.

The memory 33 stores digital content data decoded through the decoder 32. When the digital content data is decoded through the decoder 32, the digital content data is first stored in the memory 33 and then directly reproduced through the system control unit 36 or stored in a mass storage device.

The storage device 35 is a device capable of permanently storing a large amount of data such as a hard disk or a memory card. In general, unlike a volatile memory in which data is directly inputted and outputted by address setting, it is managed by a file system such as FAT32. However, in the present invention, a specific area of the entire storage space is not managed by the file system, and data can be written or read directly. Can be secured with direct access area. Depending on the setting, all or part of the entire storage space may be provided as a direct access area.

The access control unit 34 checks the direct access area of the storage device 35 and stores the decoded digital content data stored in the memory 33 in the direct access area of the storage device 35 or the data from the storage device 35. Read it.

At this time, the following operation is performed to write and read data in the direct access area of the storage device 35 without going through the file system.

That is, the access control unit 34 divides the physical space corresponding to the direct access area of the storage device 35 into specific block units, sequentially allocates addresses in adjacent order, and manages data to be stored and read in the form of a circular ring. do. The decoded digital content data stored in the memory 33 is sequentially stored in a block corresponding to the assigned address.

This behavior is compared with the way file system is managed.

The storage area in the storage device 35 managed by the file system needs to find a boot area and a directory location in order to find a storage location of the data. Since the location of the stored data is not arranged continuously, data access takes a certain time. do.

This type of data management is suitable for systematically managing a large amount of data, but data that is temporarily stored and played back for a specific purpose, such as streaming video data, needs to be stored and read more quickly. When data is stored in the form of a cyclic ring by setting a continuous address, the data continuously input can be overwritten and stored, and the address pointer can be moved and played back.

The system controller 36 reproduces the digital content data stored in the memory 33. When a time shift input is generated by a user's key input or the like, digital content data is received from the direct access area of the storage device 35 and reproduced in response to the time shift input.

At this time, the system control unit 36 receives data sequentially from the blocks in the storage device 35 corresponding to the address allocated by the access control unit 34 in the order of consecutive addresses, and transmits the received data to the video signal and the audio signal. Convert to and print it out.

For example, when a broadcast signal is received and reproduced in real time, the broadcast content stored in the memory 33 is normally played back and watched, but when the user is away, the broadcast content that was not watched while away is stored in the storage device 35. You can load it and watch it. In addition, if the playback speed of the stored data is set to a high speed, it is possible to catch up with the broadcast signal that is currently being played after watching the stored data quickly. You can play by watching.

3 is a diagram showing a direct access area in which data is directly stored and read without being managed by a file system such as FAT32 in the hard disk device.

As shown, the storage space of a storage device such as a hard disk or a memory card is divided into a file system management area and a direct access area.

The file system is an example in which a FAT32 file system is used. In general, general data stored in a storage device is stored and read in a FAT32 area through a file system and a device driver.

However, the direct access area set not to be managed by the file system directly receives and stores data without passing through the file system by the content reproducing apparatus of the present invention, and the content reproducing apparatus reads data from the direct access area without passing through the file system. Do it.

4 is an exemplary diagram illustrating a method in which data stored in a memory is sequentially stored without passing through a file system in a hard disk.

Decoded digital content data is sequentially input to and stored in the memory. Then, the direct access area of the hard disk is divided into consecutive sector units.

Each of the divided sectors is managed by the content reproducing apparatus by allocating a kind of virtual address like managing the address of the memory. In other words, the data stored in the memory is sequentially copied as it is and transferred to the direct access area of the hard disk, where the data is not stored in the form of a file by the file system, but is allocated to each sector of the hard disk. It is stored and managed in units of virtual addresses.

Accordingly, when the content reproducing apparatus knows the start address of the direct access area in which data is stored, it can sequentially move to the next sector unit to store data. The data reproducing apparatus moves from the sector corresponding to the start address to the next sector while reading data. You just need to read sequentially. This saves you the trouble of having to keep track of where you want to store your next data, just like in the case of a filesystem.

By managing the direct access area in the form of a circular ring, when data is stored in every address allocated to the direct access area, the data is returned to the first address, and the data is continuously stored by overwriting the data. In the case of reading data, if all data is read to the last address, the data can be returned to the first address to continue the data reading.

By managing the data storage and reading in the form of a circular ring in this way, the storage and reading of the data can be continued without interruption, it is possible to efficiently manage the data storage space of a limited size.

5 is a flowchart showing the overall operation of the content playback method using direct access according to the present invention.

First, a specific area of the entire storage space of the storage device is set as a direct access area not managed by the file system (ST10).

The digital content data received through broadcast or externally input is decoded using a digital compression codec such as MPEG to recover a digital signal before encoding and compression (ST20), and the decoded digital content data is sequentially stored in a memory. (ST30).

Next, the direct access area in the storage device is checked, and the decoded digital content data stored in the memory is stored in the direct access area in the storage device (ST40). In this case, data is stored in the direct access area by storing data at an address of a memory without going through a file system, which will be described in more detail with reference to FIG. 6.

If a time shift command such as a user key input is received, the digital content data is read and reproduced from the direct access area of the storage device in response to the input time shift command (ST50). The above data reading process will be described in more detail with reference to FIG. 7.

Through the above process, data can be stored and read at a high speed without going through the file system to a specific part of the storage device such as a hard disk and a memory card, and through this configuration, the real-time broadcast data is stored in the storage device. The so-called time shift function for reproducing data reproduced at a past time based on the broadcast can be effectively implemented.

FIG. 6 is a flowchart illustrating an operation process of the direct access area storage step ST40 in the hard disk device of FIG. 5 in detail.

First, the direct access area of the storage device is checked (ST41), and the physical space corresponding to the direct access area is divided into specific block units (ST42).

Then, addresses are sequentially allocated to each divided block in an adjacent order to manage data to be stored and read in a circular ring form (ST43).

Next, the decoded digital content data stored in the memory is sequentially stored in the block corresponding to the address (ST44).

Through this operation, data can be quickly stored in a storage device such as a hard disk without a complicated process as the data is sequentially input for each consecutive address allocated to the storage area of the general memory.

FIG. 7 is a flowchart illustrating an operation process of the digital content data reproduction step ST50 in FIG. 5 in detail.

First, the decoded digital content data stored in the memory is reproduced (ST51).

Then, it is checked whether or not a time shift input has occurred due to a user key input or the like (ST52), and checks the reproduction time of the data and its corresponding address in response to the time shift input (ST53).

The physical position of the block corresponding to the address is calculated in the direct access area of the storage device (ST54), and the digital content data is sequentially read from the blocks corresponding to the address in the order of successive addresses (ST55).

Next, the read digital content data is converted into a video signal and an audio signal and outputted (ST56).

In this way, if only the address of the read start time is known, the remaining data can be easily retrieved from the consecutive addresses, so that data reproduction can be performed quickly.

Although the present invention has been described in more detail with reference to the examples, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit 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 protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 is an exemplary view illustrating a method of storing data on a hard disk according to the prior art;

2 is a block diagram showing the overall configuration of a content playback apparatus using direct access according to the present invention;

3 is a diagram showing a direct access area in which data is directly stored and read without being managed by a file system such as FAT32 in a hard disk device;

4 is an exemplary diagram illustrating a method in which data stored in a memory is sequentially stored without passing through a file system in a hard disk;

5 is a flowchart showing the overall operation of the content playback method using direct access according to the present invention;

FIG. 6 is a flowchart illustrating an operation process of a direct access area storage step ST40 in the hard disk device of FIG. 5 in detail;

FIG. 7 is a flowchart illustrating an operation process of the digital content data reproduction step ST50 in FIG. 5 in detail.

Claims (6)

A decoder for decoding digital content data; A memory for storing digital content data decoded by the decoder; A hard disk device in which an entire storage space is divided into an area managed by a file system and a direct access area; An access control unit which checks a direct access area of the hard disk device and stores and reads digital content data decoded by the decoder in a circular ring form in the direct access area; And Provides access according to the file system of a general external storage device to an area managed by a file system of the hard disk device, and if a time shift input occurs while playing digital content data stored in the memory, Correspondingly, a system controller for reading and reproducing digital content data from the direct access area of the hard disk device through the access controller; Content playback device configured to include. The method according to claim 1, The access control unit divides the physical space corresponding to the direct access area of the hard disk device into specific block units and sequentially allocates virtual addresses in an adjacent order to manage data to be stored and read in the form of a circular ring. And decoded digital content data are sequentially stored in a block in a block corresponding to the allocated virtual address. The method according to claim 2, The system controller stops playback of the digital content data stored in the memory when a time shift start command is generated, and from the block in the hard disk device corresponding to the virtual address assigned by the access controller when the time shift playback command is generated. Data is sequentially received in the order of consecutive virtual addresses, converted into video signals and audio signals, and outputted. When all data received from the hard disk device is reproduced up to the present time, reading of data from the hard disk device is stopped and the And reproducing the decoded digital content data stored in the memory. delete delete delete

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