KR20020085864A - Recording medium for storing real time recording/reproduction information, method and apparatus for recording and reproducing in real time, and file operating method using the same - Google Patents

Abstract

PURPOSE: A recording medium for storing real-time recording/reproducing information, a method and a device for real time recording/reproducing and a file manipulation method using the information are provided to distinguish real time files from general files and use recording/reproducing defect management information, file allocation information, buffering information and stepped continuous storing unit size information as the real time recording/reproducing information for carrying out the real time recording/reproducing effectively. CONSTITUTION: A method for real time recording/reproducing includes the steps of disposing and recording real time files requiring real time recording/reproducing on a recording medium on the basis of real time recording/reproducing information and recording the real time recording/reproducing information to the recording medium, and reading and reproducing the real time file data by using the real time recording/reproducing information by storing the real time recording/reproducing information to a volume structure area of the recording medium, wherein the real time file reading and reproducing step is carried out by the sub-steps of reading a volume area on the recording medium, and reproducing one of the real time files considering the real time recording/reproducing information if the information exists in the volume area.

Description

Recording medium for storing real time recording / reproducing information, a method and apparatus for real time recording and reproducing, and a file manipulation method using the information {Recording medium for storing real time recording / reproduction information, method and apparatus for recording and reproducing in real time, and file operating method using the same}

The present invention relates to a system requiring real time recording and / or reproducing, and more particularly, to a recording medium storing real time recording / reproducing information, a method and apparatus for recording and reproducing a real time file based on the real time recording / reproducing information, and A file manipulation method using this information.

In the case of A / V files that require real-time recording and playback in computer or audio and video (A / V) devices that are file systems, the control information indicating that they are real-time recording / playback files is not recorded in the file control information. In this case, when a file composed of data blocks interspersed and not physically contiguous on the recording medium is reproduced, a problem occurs that real time reproduction is impossible.

Here, as shown in FIG. 1, the conventional file system stores the file control information in which information such as the file length, the location of the file data, and whether the file can be read or written is stored in the location indicated by the file control information and the file control information. It consists of file data. When reading the file on the disc, the file control information is read first, and the file data at the position indicated by the read file control information is read and reproduced. Such a method of allocating a fixed-size block used in the conventional file system causes a problem that real-time playback is impossible during file playback.

That is, the recording and reproducing of the conventional file system will be described by taking an example in which two files occupy blocks in the disc as shown in FIG. File A is a file for which real-time playback is required. This file A occupies blocks 0, 3, 5 and 6 of the disk, and file B occupies blocks 1,2, 4 and 7 of the disk as a normal file.

The process of playing file A is as follows.

Step 1: Read block 0.

Step 2: Search for block 3.

Step 3: Read block 3 and play it back.

Step 4: Search for Block 5.

Step 5: Read and play blocks 5 and 6.

In a conventional file system, even if a file that requires real time recording and playback is recorded, real time playback may not be possible because information on the real time recording and playback is not recorded and data arrangement for real time recording and playback is not considered. There was a problem.

That is, although file A (e.g., a video file) shown in FIG. 2 requires real-time reproduction, a conventional file system arranges a data file without taking this into consideration, thereby causing the screen to break during reproduction. The condition for recording and reproducing a file in real time is that the sum of search time and read time should not be greater than the reproduction time. This can be expressed as follows.

seek ~ time + read ~ time ~ ~ playback ~ time

However, drive devices of discs such as compact discs (CDs) and digital versatile discs (DVDs) have considerably longer seek times than read times. In this case, the screen is not interrupted by reading the next block after reading the current block and reading the next block. However, since the seek time is long in the conventional CD and DVD drive, the real time playback is impossible unless the next block is physically immediately adjacent. .

In order to solve the above problems, it is an object of the present invention to provide a recording medium for storing real-time recording / playback information for a real-time file.

Another object of the present invention is to provide a method for recording real time recording / reproduction information after arranging real time files in a continuous storage unit and reproducing the file in real time according to the real time recording / reproduction information.

Another object of the present invention is to copy the file in consideration of the real-time recording / playback information, and add the real-time recording / playback information of the original file to the copied file in real time using the real-time recording and playback information To provide a way to play.

Still another object according to the present invention is an apparatus for recording real-time recording / reproducing information for each section corresponding to a case where a recording / reproducing bitrate changes for each section and reproducing a file in real time according to the real-time recording / reproducing information for each section. To provide.

It is still another object of the present invention to provide a file manipulation method such as generating a file in which real time recording / reproducing information is set, expanding a data area, and recording and reproducing.

In order to achieve the above objects, a recording medium according to the present invention is a recording medium for recording a real time file requiring real time recording and reproduction: real time recording / reproducing information for ensuring real time recording and reproduction of the real time file. It is characterized by storing.

The recording and reproducing method according to the present invention comprises the steps of arranging and recording a real-time file requiring real-time recording / reproducing based on real-time recording / reproducing information to ensure real-time reproduction, and recording the real-time recording / reproducing information together in a predetermined area. And reading and reproducing real-time file data based on real-time recording / reproducing information.

A recording and reproducing apparatus according to the present invention is an apparatus for recording and / or reproducing a real-time file on a recording medium by real-time recording / reproducing information for ensuring real time recording and reproduction: during recording, a predetermined compression of an input bitstream is performed. The system compresses and compresses the compressed data to provide compressed data, and during reproduction, temporarily stores the compressed data according to the recording bit rate by using a codec that decodes the compressed coded data and bit rate information which is one of real time recording / reproducing information. A buffer that transfers data written on a recording medium to a codec according to the reproduction bit rate.When recording, the data stored in the buffer is converted into a signal suitable for recording and recorded on a disc together with real-time recording / playback information. Reproduces the read data according to the real-time recording / playback information recorded in a predetermined area of the disc. No. characterized in that it comprises a controller for driving and controlling the servo mechanism including a spindle motor from the processor and the real time recording / reproduction bit rate information of the information.

Also, a file manipulation method using real-time recording / playback information according to the present invention is a file manipulation method for a system capable of recording and rewriting a realtime file to which realtime recording / playback property information is assigned: using realtime recording / playback property information. The real-time file is manipulated in response to any one of a real time file generation mode, an area allocation mode, a recording mode, a playback mode, a deletion mode, and an end mode.

1 is a diagram showing a one-dimensional structure of a recording medium showing a relationship between file control information and file data.

2 shows an example in which two existing files occupy blocks on a disk.

3A to 3D illustrate examples in which real-time recording and reproduction attribute information is stored according to the present invention.

4 is a diagram illustrating an example in which a real time file occupies blocks on a disc in a continuous storage unit according to the present invention.

FIG. 5 is a diagram showing a one-dimensional structure of a recording medium on which real-time AV data allocated in a continuous storage unit according to the present invention is recorded.

6 (a) and 6 (b) are diagrams for explaining an example in which a file is copied in a continuous storage unit according to the present invention.

7 is a flowchart according to an embodiment of a reproducing method using real time recording / reproducing information according to the present invention.

8 is a schematic block diagram of a recording / playback apparatus for aiding in understanding the present invention.

9 is a diagram illustrating a control flow for real time recording / reproducing for a real time rewritable system.

10 is a diagram illustrating a data flow for real time recording / reproducing for a real time rewritable system.

11 shows an example of allocating an unrecorded / allocated area of a real-time recording / playback file.

12A to 12D are diagrams showing an example of recording data of a real time recording / reproducing file.

13A to 13D are diagrams for describing file control information corresponding to a case in which bitrates differ for each section.

14A to 14C are diagrams for explaining partial deletion of real-time recording / reproducing file data.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of a recording medium for storing real-time recording / playback information, a real-time recording and playback method and apparatus and a file operation method using this information.

3A to 3D illustrate examples in which real time recording / reproducing information (which may be referred to as real time recording / reproducing attribute information) according to the present invention is stored. This real time recording / reproducing information may be given as an attribute to each real-time file as shown in FIG. 3 (a). For example, the real-time recording / reproducing attribute information may be a UDF (Universal Disk Format). In the case of a system, it may be stored on a file extended attribute area or a stream directory information control block (ICB) area in a file entry.

Alternatively, a file identifier descriptor may be stored or may be stored in a file type region or a flag region of an information control block (ICB) TAG field in a file entry. This file entry may be referred to as a file control information area or a file structure area.

In addition, as shown in FIG. 3B, real-time recording / reproducing attribute information for each file can be stored in a predetermined area (information area) in each file. As an example, in the RTRW format, real-time recording / playback attribute information may be stored in a data file called RTRW_TS.VOB. As shown in (c) of FIG. 3, real-time recording / playback attribute information for each file may be stored as a separate file. As an example, real-time recording / playback attribute information may be stored in an information file called RTRW_TS.IFO in RTRW format. As another example, when the file system is a UDF system, as shown in (d) of FIG. 3, the real-time recording / reproducing attribute information may be stored in a volume structure area that is distinguished from a file structure area. Can be.

Therefore, if real-time recording / playback property information is stored in the volume structure area or file structure area in the UDF format, the realtime recording / playback property information is interpreted first when the volume is read (mount) or when the file is read (open). The data is recorded and played back in real time according to the interpreted information.

This real-time recording / playback attribute information includes real-time recording and playback file indication information (for example, identifier = "AV file") indicating that the file is required for real-time recording and playback. One or more of the size information of the continuous storage unit satisfying the condition, the reproduction time to guarantee the minimum continuous storage, the recording / reproducing bitrate, or the continuous recording and reproduction type information may be stored. Here, if the continuous recording and reproduction type information is an example of the disc types A, B, and C, it may be predetermined as follows.

type A = 10.08 Mbps, type B = 1.4 Mbps, type C = 8 Mbps

This real-time recording / reproducing attribute information also includes an attribute indicating whether a file is currently arranged for real-time recording and reproduction, that is, a current real-time recording and reproduction state attribute.

When the recording / reproducing bit rate is changed for each section, several bit rate values and information about the section (for example, location information) may be recorded as real-time recording / reproducing attribute information. Here, the control information of the spindle motor can be obtained by using bit rate information for each section.

In addition, the real time recording / reproducing attribute information may further include file defect management information, file buffering information, file allocation information, and the like. That is, if file defect management information is stored as real-time recording / reproducing attribute information, for example, when reading or writing fails, the defect block is not attempted to be replaced with a spare area, and the defective block is read again. Or do not attempt to write.

Further, as real time recording / reproducing attribute information, for example, a defective block replaced with a free area may be stored file allocation information for allocating a file data area such as not allocated as a data block, and must be read in advance from the track buffer. File buffering information about the amount of initial read data and the amount of data previously recorded in the track buffer at one time may be stored.

Rather than storing many real-time recording / playback properties such as file defect management information, file allocation information, file buffering information, etc. as the above-described realtime recording / playback property information, the conditions for controlling the real-time file are classified by type and recorded in real time. By recording the type information in the reproduction file attribute information area, real time recording and reproduction can be easily implemented. For example, it may have the following type information.

type A = Data bitrate 10 Mbps, unable to allocate data block to defective block replaced by free area, retry on read failure.

type B = Data bitrate 8 Mbps, can allocate data block to defective block replaced by free area, cannot retry on read failure.

On the other hand, in Fig. 4 showing an example in which a real time file occupies blocks on a disc in a continuous storage unit according to the present invention, file A is a file requiring real time reproduction. The file A is recorded in real time in units of 4 blocks when the continuous storage unit satisfying the condition of Equation 1 is an example, 4 blocks. In other words, real-time file A occupies blocks 0, 1, 2, 3, 5, 6, 7, 8, 11, 12, 13 and 14 of the disk. General file B occupies blocks 4, 9, 10 and 15 of the disk. The normal file B which does not require real time reproduction may be stored in one or arbitrary pieces since the continuous storage unit is one block. This block usually corresponds to a sector.

File A operates as follows for real time playback.

Step 1: Read blocks 0, 1, 2, and 3.

Step 2: Search for block 5 while playing blocks 0,1,2,3.

Step 3: Read blocks 5, 6, 7, and 8.

Step 4: Search for block 11 while playing blocks 5, 6, 7, and 8.

Step 5: Read and play blocks 11, 12, 13 and 14.

Recording of this file is impossible unless there is an area on the disc for successive blocks that can satisfy the continuous storage unit in the storage of a file requiring real time reproduction. However, a warning message is displayed to the user, "As a continuous recording unit is specified and stored in one block because continuous recording is not possible." If the user requests storage, the user can save one continuous storage unit. In this case, the size information of the continuous storage unit included in the realtime recording / playback property stores the value of the initially designated continuous storage unit, but the currently stored file batch cannot be recorded and played back in real time in the current realtime recording and playback state property. The information is stored. This is so that when copying onto another disc or the same disc, the file to be copied continues to be treated as a real time recording and playback file.

According to the present invention, even in a driving device such as a CD driver and a DVD drive, a driving time (for example, 150 ms) is considerably longer than a read time (for example, 1.43 ms) (search time >> read time), If the condition of search time + read time <reproduction time, which is the condition of 1, is satisfied, real time playback is possible.

On the other hand, this continuous storage unit is for satisfying a predetermined purpose by limiting the allocation of free blocks on the disk. Here, the free block includes an unused area or a rewritable area that does not include a defective block among user areas that can be used by a user.

If the continuous storage unit is defined as, for example, 16 blocks arranged in an Error Correction Code (ECC) block, data blocks may not be allocated to less than 16 consecutive free blocks. In addition, data blocks cannot be allocated to 16 consecutive free blocks that span two ECC blocks. Here, the continuous storage unit is intended for recording / reproducing in the ECC unit of the DVD-RAM.

On the other hand, if all the real-time data is stored on the physically contiguous blocks of the disk, the search does not occur and the screen is not broken, but since the contiguous blocks do not exist indefinitely, the contiguous storage unit is calculated to calculate the file size. Saving as a real-time recording / playback attribute and recording real-time data in this continuous storage unit can prevent the screen from breaking.

For example, an MPEG stream of 8 Mbps (= Vb), a seek time of 150 ms, a read time of 11 Mbps (= Va), a block size of 2048 bytes, one ECC block consists of 16 blocks of data and a recording medium such as a disk. In the case of writing to the continuous block storage unit S can be obtained as follows according to the conditions shown in Equation 1 above.

The continuous storage unit S is 261 blocks, and data can be recorded in real time by specifying 261 blocks or more as a continuous block storage unit, but can also be designated as 272 blocks, which are 17 consecutive ECC blocks. Here, the predetermined purpose is to guarantee recording / reproducing when the maximum seek time is 150ms.

16 blocks, which are ECC blocks, are designated as a continuous storage unit, and a free block allocation method for real time recording and reproducing is added in step 1 as shown in Table 1 by adding a limit such as search time as shown in Equation 2 above. Can be placed.

Number of consecutive blocks purpose Tier 3 1088 blocks (ECC aligned) Guarantees real-time recording / playback between blocks requiring 600ms seek time Tier 2 272 blocks (ECC alignment) Real-time recording / playback between blocks requiring 150ms seek time Stage 1 16 blocks (ECC aligned) Guarantees ECC recording and playback (* 1 step requires that all allocated blocks be satisfied)

It is possible to ensure real time recording and reproducing by recording and reproducing A / V data by physically connecting blocks that satisfy the limitation of the staged continuous storage unit. For example, if there are blocks of the following three consecutive storage units, [16 blocks]-[272 blocks]-[1088 blocks], real-time recording / playback may be performed depending on how the blocks are connected when the search time is 150ms. It may or may not be possible.

[272 Block]-> [1088 Block]-> [16 Block]: Real time recording and playback

[16 Blocks]-> [272 Blocks]-> [1088 Blocks]: Real time recording cannot be played.

Therefore, the continuous storage unit can be efficiently recorded and reproduced in real time by using a staged method and a block connection method.

On the other hand, even when recording in accordance with the condition of the continuous storage unit, as shown in Figure 5, if the end of the file does not fill the data of the continuous storage unit as much as the amount of data blocks that are allocated but not recorded, indicating that the property is not recorded It is stored as real-time recording / playback information to enable real-time playback when additional recording.

That is, in Fig. 5 showing a one-dimensional structure of a recording medium on which real-time AV data stored in a continuous storage unit is located, the file length, file data position, and file read / write are contained in the file control information located in the disk block l. Real-time recording / playback attribute information is further stored in addition to information such as availability, and the first file data located in the disk block m has a contiguous storage unit of 272 data blocks allocated by two contiguous storage units, The second file data located is allocated as a data block having 272 contiguous storage units, and the third file data located in the disk block o is 200 data blocks and 72 data blocks allocated and allocated (unlocated / unrecorded block). ) Is assigned.

Meanwhile, when copying a file for real time recording and reproducing to the same disc or to another disc, the data block of the file should be arranged to be reproduced on the disc to be copied using real time recording / playback attribute information. If it is impossible, it is arranged based on the same criteria as the general file block arrangement.In this case, the real-time recording / playback attribute information is maintained in the original attribute information, but the real-time recording and playback state attribute is set to be impossible in real time recording and playback. .

In addition, if the OS (Operating System) knows a defect on the disk when copying a file, the data block should be arranged in consideration of the original real-time recording / playback attribute information and the defect management information recorded in the SDL (Secondary Defect List). As shown in FIG. 6 (a), when the continuous storage unit is 40 blocks, it is arranged as shown in FIG. 6 (b) in consideration of a defective area (here 6-10 blocks) of the disk to be copied. Otherwise, if the OS does not know the defect recorded in the SDL, the data is placed in the block excluding the defect area as shown in FIG. 6B in consideration of real-time recording / playback attribute information at the application level.

7 is a flowchart according to an embodiment of a reproducing method using real time recording / reproducing information according to the present invention. When the disc is mounted in the player (step S101), the volume area on the disc is read (step S102). It is determined whether real-time recording / reproducing information exists in this volume area (step S103), and if real-time recording / reproducing information exists in the volume area, file reproduction is set in consideration of real-time recording / reproducing information (step S104). In step S103, real-time recording / reproducing information does not exist in the volume area, or after performing step S104, volume recognition is completed (step S105).

After performing step S105, the file is read (step S106). It is determined whether real time recording / playback information exists in the read file (step S107), and if the realtime recording / playback information exists in the file, the file is set to be considered in consideration of the realtime recording / playback information (step S108). In step S107, the file is reproduced in consideration of whether the real time recording / reproducing information does not exist in the file or if the real time recording / reproducing information is set after performing step S108 (step S109).

Here, if the real time recording / playback information exists in the volume structure area, steps S107 and S108 may not be performed. If the realtime recording / playback information exists in the file control information area, steps S103, S104, and S105 may be performed. You may not perform the steps.

Fig. 8 is a schematic block diagram of a recording / playback apparatus for better understanding of the present invention. The functions of the apparatus for recording and reproducing A / V data using a recordable and rewritable disc can be broadly divided into recording and playback.

During recording, the codec 110 compresses and encodes an A / V signal from an external bitstream by a predetermined compression scheme, and compresses the data compressed according to the recording / reproducing bit rate Vb. Fill in The error correction encoder and decoder (denoted ECC) 130 perform error correction encoding on the data written in the track buffer 120, read the data at the write / read rate Va, and apply the data to the pickup unit 140. The real time recording / reproducing information generated under the control of the controller 170 is applied to the pickup unit 140 to be recorded on the volume structure area or the file control information area. The pickup unit 140 converts the error correction coded data into an optical signal and records the data on the disc 150. At this time, the spindle motor 160 for driving the disk 150 is controlled in the recording rotation speed in accordance with the servo control signal from the controller 170.

During playback, if real-time recording / playback information is stored in the file control information area or the volume structure area, the file data is read based on information read out by first reading buffering information, file allocation information, and defect management information on the initial read buffer amount. Control the reading of the data, and then read the size information of the continuous storage unit, and read the file data of the continuous storage unit from the disk 150 according to the write / read bit rate Va and the error correction encoder through the pickup unit 140. The file data read out from the decoder 130 is error corrected and decoded and written to the track buffer 120. The codec 110 reads and decodes the data written in the track buffer 120 in accordance with the write / reproduce bit rate Vb to reproduce A / V data.

In addition, if the recording / reproducing bitrate information for each section exists in the real time recording / reproducing information, the controller 170 records / plays the bitrate for each section provided through the pickup unit 140 and the error correction encoder and decoder 130. The control information of the spindle motor 160 can be obtained from the information to drive not only the spindle motor but also the servo mechanism.

9 is a diagram illustrating a control flow for real time recording / reproducing of data on a disk to which real-time recording / playback attribute according to the present invention is applied in a real time rewritable system (RTRT).

The RTRW system includes an application layer 201 for generating commands related to recording and reproducing A / V data, a window kernel 202 and a window kernel 202 using a window kernel as an example of interpreting the generated commands. In accordance with the command interpreted from), a driver command is requested by transmitting a driver command to the drive 204. For example, the device driver 203 has a file system such as a DVD-RAM device driver. Here, the window kernel 202 and the device driver 203 may correspond to a file system layer, and the window kernel 202 may be referred to as a kernel layer.

10 is a diagram showing a real-time recording / playback data flow for a computer system of the RTRW system. During recording, the A / V data input to the AV encoder 211 in real time is stored in the computer main memory 212, and the A / V data stored in the main memory 212 is stored in a hard disk drive ("HDD", 213 The process of storing in the first-in first-out (FIFO) file and the process of storing the HDD-213 FIFO file on the DVD-RAM disk 214 are performed in a multi-tasking manner. Here, if there is sufficient main memory on the computer, there may be no FIFO file in the HDD.

During playback, the A / V data is stored in the main memory 215 of the computer in the DVD-RAM disk 214 in real time, and the A / V data stored in the main memory 215 is stored in the A / V decoder 216. The reading process is performed in parallel.

As an example, a method of generating, data area allocation, recording, reproducing, deleting, and terminating a file to which a real time recording / playback property is assigned in an RTRW system using a window kernel will be described with reference to FIG. 9.

How to create a realtime recording / playback file

First step: The Windows kernel application programming interface (API), which is called to create a real-time recording / playback file, is a create file. In order to generate a real-time recording / playback file in the application layer 201, the window kernel 202 is called as in the following example by specifying a file attribute as FILE_ATTRIBUTE_RTRW in the generated file.

Example: FileHandle = CreateFile ("AVFILE.MPG", FILE_ATTRIBUTE_RTRW, ...)

Second Step: The Windows kernel 202 calls the file creation function with the DVD-RAM device driver 203.

Step 3: When the file creation function is called, the DVD-RAM device driver 203 specifies the FILE_ATTRIBUTE_RTRW attribute. When the FILE_ATTRIBUTE_RTRW attribute is specified, the file control information is transferred to the extended attribute area of the file entry of the UDF, and the stream directory Information Control Block. ) In the file type area or flag area of the ICB TAG field of the file entry. Here, bit rate information may be set together when generating the AV file.

Realtime recording / playback file allocation / unrecorded area allocation method

First step: The Windows kernel API calling for real time recording / playback file allocation / unrecorded area allocation is a setfile pointer having a seek function. The application layer 201 calls the window kernel 202 with SetFilePointer as in the following example to secure the data area of the real-time recording / playback file in the form of allocation / unrecording in advance by the continuous storage unit.

Alternatively, using SetFileBitrate (FileHandle, bitrate), a data area required for real time recording / reproduction can be secured in a pre-allocated / unrecorded form. At this time, if the bitrate is known in the application layer, if an API for converting the bitrate into the number of blocks exists in the file system layer, it can be converted to SetFilePointer to secure the data area necessary for real-time recording / playback in the allocated / unrecorded state. .

Example: SetFilePointer (FileHandle, 8 * 1024 * 1024, NULL, FILE_END)

SetFileBitrate (FileHandle, bitrate)

Second Step: The Windows Kernel 202 Calls the File Search Function With the DVD-RAM Device Driver 203

Step 3: When invoking the file search function, the DVD-RAM device driver 203 checks whether a file has a real-time recording / playback property specified, and determines an AV block condition as long as the length of the file to be searched among the designated realtime recording / playback properties. As shown in FIG. 11, a data area of an allocated / unrecorded type is secured according to file defect management, file allocation, file buffering, size of continuous storage unit, and bitrate information. One or a plurality of secured areas may be allocated and arranged in units of ECC.

Real time recording / playback data recording method

First step: The Windows kernel API that calls for data recording of a real-time recording / playback file is a write file. To save real-time data, the application layer 201 calls the window kernel through WriteFile as shown in the example below.

Example: WriteFile (FileHandle, AV_Buffer, 32 * 1024, NULL, NULL)

Second Step: The Windows kernel 202 calls the file write function with the DVD-RAM device driver 203.

Step 3: When calling the file recording function, the DVD-RAM device driver 203 checks whether the file has a real time recording / playback property specified, and if the realtime recording / playback property is specified, records the A / V data to be recorded in real time. Recording is performed in the allocated / unrecorded area according to the recording conditions. If there is no allocated / unrecorded area during recording, the application layer 201 is notified of the recorded data size. The application layer 201 secures an unrecorded / allocated area designated as a real time recording / playback property and records the remaining data in order to record the remaining data that could not be recorded using the search command SetFilePointer with reference to the recorded data amount.

That is, as shown in (a) of FIG. 12, as much as 32 * 1024 A / V data is recorded in the 8 * 1024 * 1024 sized allocation / unrecorded allocation area shown in FIG. Allocate to an unrecorded area.

As shown in (b) of FIG. 12, when the amount of data written in the written application layer 201 is notified due to insufficient allocation / unrecorded area by 32 * 1024 bytes, the amount of data recorded in the written application layer 201 is written. For reference, the allocated / unrecorded area is secured using SetFilePointer, or the file system layer automatically secures the unallocated area using bitrate information specified through SetFileBitrate, and the remaining data is stored as shown in (c) of FIG. Record it. During recording, recording is performed in units of ECC blocks. If a defective block occurs during recording and an error occurs, the corresponding block is excluded from the allocated / unrecorded area as shown in FIG.

At this time, if the bit rate can be classified for each section, the bit rate information for each section may be recorded in the file control information area. That is, FIGS. 13A and 13B show a plurality of bit rate values (here, V ₁ , V ₂ , and V ₃ ) in a file control information area in response to a case where the recording / reproducing bit rate for each section is different. FIG. 13 (c) and (d) show one bit rate value (here, V) in the file control information area when the recording / reproducing bit rate is constant. _b ) shows an example of storing as real time recording / reproducing information.

Real time recording / playback file data playback method

First step; The Windows kernel API that calls for data playback of real-time recording / playback files is a read file. In order for the application layer 201 to play real-time data, call the window kernel through ReadFile as in the example

Example: ReadFile (FileHandle, AV_Buffer, 32 * 1024, NULL, NULL)

Second Step: The Windows kernel 202 calls the file read function with the DVD-RAM device driver 203.

Step 3: When calling the file reading function, the DVD-RAM device driver 203 checks whether a file has a real-time recording / playback property, and if the realtime recording / playback property is specified, the A / V of the length to play back. Data is played back in the A / V data area according to real-time playback conditions.

Here, when a defect of a block to be reproduced occurs, a read command is given from the DVD-RAM device driver 203 to the drive 204 to give an assignment / unrecorded file attribute and instruct not to read.

Real time recording and playback should use the real time recording and playback commands provided by the DVD-RAM driver's command interface.

How to delete the real time recording / playback file data

First step; The Windows kernel API called to delete the data portion of the real-time recording / playback file is the DeletePart File (DeletePart0fFile). To delete part of the real-time data, the application layer 201 calls the window kernel through DeletePart0fFile as in the example below.

Example: DeletePart0fFile (FileHandle, Offset, Size)

Second Step: The Windows kernel 202 calls the file portion erase function with the DVD-RAM device driver 203.

Step 3: When calling the file part deletion function, the DVD-RAM device driver 203 checks whether a file has a real-time recording / playback property. Delete in the / V data area. When deleting a file part, a dummy file or a file managing ECC padding is created under the root directory on the system file for sorting by ECC blocks.

FIG. 14A illustrates an area to be deleted from a real-time file in which A / V data is arranged in units of ECC, and the deletion area is allocated to a free area as shown in FIG. The A / V data section belonging to the erased area among the ECC blocks spanning the boundary of is called padding space, and the A / V data of this padding space is managed as a separate file on the system file. It is stored in the (Application Descriptor) list. The A / V data which does not belong to the deletion area among the overlaid ECC blocks is stored in the AD list of file entries. This ECC padding space list is updated again according to a function such as deletion or writing. When the method of the present invention is applied to the UDF system, it can be expressed as a short allocation descriptor.

In FIG. 14B, both the A / V file space and the padding space of the ECC block that span the boundary of the erase area have an extended length. However, as shown in (c) of FIG. 14, the A / V file space of the ECC block that spans the boundary of the erase area has both an extent length and an information length, but has an extent length for the padding space, but has an information length ". An allocation descriptor of 0 ", managed in the AD list in the A / V file entry. A / V file spaces that do not belong to the deletion area among the spanned ECC blocks are also managed in the AD list in the AV file end. In this case, it can be expressed as an extended allocation descriptor of the UDF.

How to end the realtime recording / playback file

Step 1: The Windows kernel API that calls for real-time file termination is a CloseHandle. To terminate the real-time recording / playback file, the application layer 201 calls the window kernel 202 through CloseHandle as shown in the example below.

Example: CloseHandle (FileHandle)

Second Step: The Windows Kernel 202 Calls the File Search Function With the DVD-RAM Device Driver 203

Step 3: Upon invoking the file termination function, the DVD-RAM device driver 203 updates file control information (file entry, etc.) and disk information (eg, free area information, etc.).

As described above, the present invention has an effect of ensuring real time recording / playback of a realtime recording / playback file by assigning a realtime recording / playback property to a file to perform recording / playback separated from a normal file.

In addition, the present invention distinguishes between a real-time file and a general file, by using defect management information, file allocation information, buffering information, and size information of the staged continuous storage unit as real-time recording / playback information when recording / playback to a real-time file Real time recording / playback can be performed efficiently.

In addition, the present invention has the effect of obtaining and controlling the control information of the spindle motor by using real-time recording / playback information on the recording / playback bit rate for each section.

Claims (80)

(a) arranging and recording a real-time file requiring real-time recording / reproducing on a recording medium based on real-time recording / reproducing information for ensuring real-time reproduction, and recording the real-time recording / reproducing information on the recording medium; And (b) reading and reproducing the real-time file data using the real-time recording / reproducing information. The recording and / or reproducing method according to claim 1, wherein the recording of the real-time recording / reproducing information comprises storing the real-time recording / reproducing information in a file control information area on the recording medium. The recording and / or recording method according to claim 1, wherein the recording of the real-time recording / reproducing information comprises storing the real-time recording / reproducing information in a file control information area of a UDF system of the recording medium. How to play. The recording and / or reproducing method according to claim 1, wherein the recording of the real-time recording / reproducing information comprises storing the real-time recording / reproducing information in each corresponding real-time file. The method of claim 1, wherein recording the real-time recording / playback information includes storing the realtime recording / playback information associated with the realtime file in a file separate from the realtime file. And / or how to play. The recording and / or reproducing method according to claim 1, wherein the recording of the real-time recording / reproducing information comprises storing the real-time recording / reproducing information in a volume structure area of the recording medium. Or how to play. The recording and / or reproducing method according to claim 1, wherein the real-time recording / reproducing information includes file indication information indicating that the real-time file is a file requiring real-time recording / reproducing. 2. The real-time file of claim 1, wherein the real-time file has sections having different bit rates, wherein the real-time recording / playback information includes a plurality of bit rate values corresponding to information associated with the sections and different bit rates of the sections. Recording / reproduction bit rate information. 10. The recording and / or reproducing method according to claim 8, wherein the disposing step automatically arranges a file data area of the real-time file according to the recording / reproducing bit rate information. 10. The recording and / or reproducing method according to claim 9, wherein the real time recording / reproducing information includes a maximum allowable value of the real time recording / reproducing bit rate. The information on the minimum continuous storage block according to claim 1, wherein the real time recording / reproducing information is a minimum and minimum information about a continuous storage block that satisfies the condition that the reproduction time of the current data block must be greater than the sum of the seek time and the read time of the next data block to be reproduced. And at least one of information on a reproduction time to ensure continuous storage. 12. The method of claim 11, wherein step (a) places the real time file in the minimum continuous storage block. 12. The method of claim 11, wherein the recording of the real-time recording / playback information comprises: filling the minimum continuous storage block unit with the end of the real-time file while the real-time file is recorded in the unit of the minimum continuous storage block. And recording information as real-time recording / reproducing information, indicating that the number of data blocks corresponding to the unfilled size is allocated but not recorded. 12. The recording and / or reproducing method according to claim 11, wherein the minimum consecutive storage blocks are staged in consideration of an error correction code block unit and a channel search time. 15. The method of claim 14, wherein the disposing step places the real time file within the staged minimum contiguous storage block. 12. The recording and / or reproducing method of claim 11, wherein the real-time recording / reproducing information further includes current real-time recording / reproducing state information indicating whether the current file is arranged for real-time recording / reproducing. . 12. The apparatus of claim 11, wherein the real-time recording / reproducing information further includes continuous recording / reproducing type information divided into conditions for controlling the real-time files, wherein the conditions are recording / reproducing bit rate information and file defect management information. Recording file allocation information, file buffering information, and information on the minimum continuous storage block. 12. The defect as set forth in claim 11, wherein the real-time recording / reproducing information replaces a defective block with a block of a free area and fails to read or write a defective block again when a read or write fails. The block further includes at least one of file allocation information not allocating a data block and file buffering information regarding the amount of data initially read from the buffer and the amount of data initially written. The method of claim 1, wherein reading and playing the real-time file comprises: Reading a volume area on the recording medium; And And reproducing a file as one of the real-time files in consideration of the real-time recording / reproducing information when the real-time recording / reproducing information exists in the volume area. 20. The method of claim 19, wherein the reproducing of the file comprises analyzing recording / reproducing bit rate information, defect management information, file allocation information, and file buffering information according to the real-time recording / reproducing information, and performing a minimum continuous storage block unit. And reading out and reproducing the file data. The method of claim 1, wherein reading and playing the real-time file comprises: Determining whether the real-time recording / playback information exists in a file area; And reproducing the file in consideration of the real time recording / reproducing information when the real time recording / reproducing information exists in the file area. 22. The method of claim 21, wherein the reproducing of the file comprises analyzing the recording / reproducing bit rate information, the defect management information, the file allocation information, and the file buffering information according to the real time recording / reproducing information, and performing a minimum continuous storage block unit. And reading out and reproducing the file data. 2. The method of claim 1, further comprising copying a file to a free area excluding a defective block based on the real time recording / reproducing information and general defect management information recorded on the recording medium. Recording and / or reproducing method. The recording and / or reproducing method according to claim 23, wherein the copying of the file comprises copying the real-time recording / reproducing information and the real-time file together. 24. The recording and / or reproducing method according to claim 23, wherein the copying of the file copies only real-time file data based on the real-time recording / reproducing information. 12. The recording and / or reproducing method according to claim 11, wherein the real time recording / reproducing information further includes current real time recording / reproducing state information indicating whether the current file can be recorded / reproduced in real time. . The method of claim 1 wherein the method is Recording general defect management information on the recording medium; Copying a file to a free area excluding a defective block based on the real time recording / reproducing information and the general defect management information recorded on the recording medium. The recording and / or reproducing method according to claim 27, wherein the copying of the file comprises copying the real-time recording / reproducing information and the file together. 28. The method of claim 27, wherein copying the file copies only real-time file data based on the real-time recording / playback information. Arranging and recording a real-time file requiring real-time recording / reproducing on a recording medium according to real-time recording / reproducing information for ensuring real-time reproduction; And And recording the real time recording / reproducing information on the recording medium. 31. The recording method as claimed in claim 30, wherein the recording of the real time recording / reproducing information comprises storing the real time recording / reproducing information in a file control information area of the recording medium. 31. The recording method according to claim 30, wherein the recording of the real time recording / reproducing information includes storing the real time recording / reproducing information in a file control information area of a UDF system of the recording medium. 31. The method of claim 30, wherein recording the real time recording / playback information comprises storing the realtime recording / playback information in each corresponding realtime file. 31. The method of claim 30, wherein recording the real time recording / playback information comprises storing the realtime recording / playback information associated with the real time file in a file separate from the real time file. 31. The recording method of claim 30, wherein recording the real time recording / reproducing information includes storing the real time recording / reproducing information in a volume structure area of the recording medium. 31. The recording method as claimed in claim 30, wherein the real time recording / reproducing information includes file indication information indicating that the real time file requires real time recording / reproducing. 31. The apparatus of claim 30, wherein the real-time file has sections having different bit rates, wherein the real-time recording / playback information includes a plurality of bit rate values corresponding to information associated with the sections and different bit rates of the sections. Recording / reproducing bit rate information. 38. The recording method according to claim 37, wherein the recording of the real time recording / reproducing information automatically arranges a file data area of the real-time file according to the recording / reproducing bit rate information. The recording method according to claim 38, wherein the real time recording / reproducing information includes a maximum allowable value of the real time recording / reproducing bit rate. 32. The method of claim 30, wherein the real-time recording / reproducing information is information about a minimum continuous storage block that satisfies the condition that the reproduction time of the current data block must be greater than the sum of the seek time and the read time of the next data block to be reproduced. And at least one of information on a reproduction time to ensure continuous storage. 41. The method of claim 40, wherein recording the real time recording / playback information comprises placing the real time file in the minimum continuous storage block. 41. The method of claim 40, wherein the recording of the real-time recording / playback information comprises filling an end of the real-time file with data of the minimum continuous storage block unit while the real-time file is recorded in the unit of the minimum continuous storage block. And recording information as real time recording / reproduction information indicating that the number of data blocks corresponding to the unfilled size is allocated but not recorded. 41. The method of claim 40, wherein the minimum consecutive storage blocks are staged in accordance with the size of the error correction code block and the stand-by search time. 44. The method of claim 43, wherein placing and recording the real-time file places the real-time file in the staged minimum contiguous storage block. 41. The method of claim 40, wherein the real-time recording / playback information further includes current realtime recording / playback status information indicating whether the current file is arranged for real time recording / playback. 41. The apparatus of claim 40, wherein the real-time recording / reproducing information further includes continuous recording / reproducing type information divided into conditions for controlling the real-time files, wherein the conditions are recording / reproducing bit rate information and file defect management information. , File allocation information, file buffering information, and information on the minimum continuous storage block. The file defect management information according to claim 40, wherein the real-time recording / reproducing information indicates that the defective block is replaced by the file defect management information that replaces the defective block with the free area block and does not attempt to read or write the defective block again when the read or write fails. The block further includes at least one of file allocation information not allocating a data block and file buffering information regarding the amount of data initially read from the buffer and the amount of data initially written. 41. The recording method according to claim 40, wherein the real time recording / playback information further includes current realtime recording / playback status information indicating whether it is possible to record / play back the current file in real time. Reading real-time files requiring real-time recording / playback using realtime recording / playback information to ensure realtime playback, and Playing the read real-time file; And a real time file requiring the real time recording / reproducing is stored in a recording medium according to the real time recording / reproducing information, and the real time recording / reproducing information is stored in the recording medium. 50. The reproduction method according to claim 49, wherein the reading of the real time file comprises reading the real time recording / reproducing information from file control information of the recording medium. 50. The reproduction method according to claim 49, wherein the reading of the real time file comprises reading the real time recording / reproducing information from a file control information area of a UDF system of the recording medium. 50. The method of claim 49, wherein reading the real time file comprises reading the real time recording / playback information in each corresponding real time file. 50. The method of claim 49, wherein reading the real time file comprises reading the real time recording / playback information associated with the real time file in a file separate from the real time file. 50. The method of claim 49, wherein reading the real time file includes reading the real time recording / reproducing information in a volume structure area of the recording medium. 50. The reproduction method according to claim 49, wherein the real time recording / reproducing information includes file indication information indicating that the real time file requires real time recording / reproducing. 50. The apparatus of claim 49, wherein the real time file has sections having different bit rates, wherein the real time recording / playback information includes a plurality of bit rate values corresponding to information associated with the sections and different bit rates of the sections. And recording / reproducing bit rate information, wherein said reproducing method reads sections of said real-time files according to said corresponding plurality of bit rate values. 57. The reproduction method according to claim 56, wherein the file data area of said real time file is arranged in accordance with said recording / reproducing bit rate information. 58. The reproduction method according to claim 57, wherein the real time recording / reproducing information includes a maximum allowable value of the real time recording / reproducing bit rate. 50. The method of claim 49, wherein the real-time recording / reproducing information is information about a minimum continuous storage block that satisfies the condition that the reproduction time of the current data block must be greater than the sum of the seek time and the read time of the next data block to be reproduced. And at least one of information on a reproduction time to ensure continuous storage. 60. The method of claim 59, wherein the real time files are located in the minimum consecutive storage blocks. The real time recording / reproducing information according to claim 59, wherein when the end of the real time file is not filled with data of the minimum continuous storage block unit while the real time file is recorded in the unit of the minimum continuous storage block, the real time recording / reproducing information. Is recorded as an attribute indicating that the number of data blocks corresponding to the unfilled size is allocated but not recorded. 60. The method of claim 59, wherein the minimum consecutive storage blocks are staged in consideration of an error correction code block unit and a stalk search time. 60. The method of claim 59, wherein the real-time recording / playback information further includes current real-time recording / playback status information indicating whether the current file is arranged for real-time recording / playback. 60. The apparatus of claim 59, wherein the real-time recording / reproducing information further includes continuous recording / reproducing type information divided into conditions for controlling the real-time files, wherein the conditions are recording / reproducing bit rate information and file defect management information. , File allocation information, file buffering information, and information on the minimum continuous storage block. 60. The file defect management information according to claim 59, wherein the real-time recording / reproducing information indicates that the defective block is replaced by the file defect management information that does not attempt to read or write the defective block again and replace the defective block with the free area block when the read or write fails. The block further includes at least one of file allocation information not allocating a data block and file buffering information regarding the amount of data initially read from the buffer and the amount of data initially written. The method of claim 49, wherein reading and playing the real-time file comprises: Reading a volume area on the recording medium; And And reproducing the file as one of the real-time files in consideration of the real-time recording / reproducing information when the real-time recording / reproducing information exists in the volume area. 67. The method of claim 66, wherein the reproducing of the file comprises analyzing recording / reproducing bit rate information, defect management information, file allocation information, and file buffering information according to the real-time recording / reproducing information, and performing at least continuous storage block units. And reproducing and reproducing file data. The method of claim 49, wherein reading and playing the real-time file comprises: Determining whether the real-time recording / playback information exists in a file area; And reproducing the file in consideration of the real time recording / reproducing information when the real time recording / reproducing information exists in the file area. 69. The method of claim 68, wherein the reproducing of the file comprises analyzing the recording / reproducing bit rate information, the defect management information, the file allocation information, and the file buffering information according to the real time recording / reproducing information. And reproducing and reproducing file data. 50. The method of claim 49, further comprising copying a file to a free area excluding a defective block based on the real time recording / reproducing information and general defect management information recorded on the recording medium. How to play. The method of claim 70, wherein the copying of the file comprises copying the real time recording / reproducing information and the real time file together. 71. The method of claim 70, wherein the copying of the file copies only real-time file data based on the real-time recording / reproducing information. 60. The method of claim 59, wherein the real time recording / playback information further includes current realtime recording / playback status information indicating whether it is possible to record / play back the current file in real time. Recording real-time files requiring real-time recording and / or reproducing to a recording medium according to real-time recording and / or reproducing information to ensure real-time reproducing, Recording the real-time recording and / or playback information in a file type field of an (ICB) TAG field in a file entry of a UDF system. 75. The method of claim 74, further comprising the step of playing the real time file using the real time recording / playback information. 75. The method of claim 74, wherein recording the real time file comprises storing the real time recording / playback information in a corresponding one of the real time files. 75. The recording and / or reproducing method according to claim 74, wherein the real time recording / reproducing information includes file indication information indicating that the real time file requires real time recording and / or reproduction. 75. The minimum continuation of claim 74, wherein the real-time recording / reproducing information is a minimum continuation that satisfies the condition that the recording / reproducing bit rate information, the reproduction time of the current data block must be greater than the sum of the seek time and the read time of the next data block to be reproduced. And at least one of information on a storage block and information on a reproduction time to ensure minimum continuous storage. 76. The method of claim 75, wherein playing back the real time file comprises: Reading a volume area on the recording medium; And And reproducing a file as one of the real-time files according to the real-time recording / reproducing information. 80. The method of claim 79, wherein the file reproducing method comprises analyzing recording / reproducing bit rate information, defect management information, file allocation information, and file buffering information according to the real time recording / reproducing information. And / or playback method.