KR100727914B1 - Data recording/reproducing method - Google Patents

Abstract

The present invention relates to a data recording / reproducing apparatus and method, wherein a backup apparatus for backing up data stored in a first storage medium to a second storage medium includes a capacity of data to be backed up on the first storage medium and a second storage medium. A resolution setting unit comparing the storage capacity and determining a bit rate of data to be backed up according to the result; And a transcoder for converting the bitrate of the data stored in the first storage medium and backing it up to the second storage medium according to the bitrate determined by the resolution setting unit.

According to the present invention, even in an emergency situation in which data is recorded on the recording medium, the relevant information generated with respect to the data recorded up to then can be stored and reproduced normally.

Description

Data recording / reproducing method

1 is a block diagram of a conventional audio / video signal recording / reproducing apparatus.

2 is an embodiment of a signal recording / reproducing apparatus for explaining the present invention.

3 shows a data recording structure of the present invention recorded on a recording medium.

4 is a flowchart of a data recording method of the present invention.

FIG. 5 is a flowchart of a recording control method performed at system startup in the recording / reproducing apparatus of which recording is performed as shown in FIG. 4.

6 is a flowchart of the data reproduction method of the present invention.

The present invention relates to a method of recording or reproducing data on a recording medium, and more particularly, to a data recording / reproducing method for protecting data that protects data recorded up to that time when recording is stopped due to an external influence during recording. It is about.

1 is a block diagram of a conventional audio / video signal recording / reproducing apparatus. Conventional audio / video signal recording / reproducing apparatus includes first and second analog / digital converters 100 and 102, video encoder 104, audio encoder 106, multiplexer 108, and hard disk drive (HDD) interface. 110, hard disk drive (HDD) 112, demultiplexer 114, video decoder 116, audio decoder 118, first, second digital to analog converters 120 and 122, system controller 124 ) And a user interface 126. The first analog-to-digital converter 100 converts a video input signal in analog form into a digital signal. The second analog-to-digital converter 102 converts an audio input signal in analog form into a digital signal. The video encoder 104 compresses and encodes the digital video signal from the first analog-to-digital converter 100. Typically, the video signal is compressed by the MPEG2 method. The audio encoder 106 compressively encodes the digital audio signal from the second analog-to-digital converter 102. Compression of the audio signal is performed using MPEG1 or AC-3 (Audio Coding-3). The multiplexer 108 multiplexes the compressed signals output from the video encoder 104 and the audio encoder 106. That is, the video compression signal and the audio compression signal are arranged together in one frame together with a header for each information unit. The HDD interface 110 interfaces so that signals multiplexed from the multiplexer 108 are stored in the HDD 112. In this case, the interface method used is an ATA (Advanced Technology Attachment) method mainly used in personal computers. The demultiplexer 114 separates the video / audio multiplexing signal read out from the HDD 112 through the HDD interface 110 into a video signal and an audio signal, respectively. The video decoder 116 decompresses the compressed video signal separated by the demultiplexer 114 and restores the original digital video signal. The audio decoder 118 extends the compressed audio signal separated by the demultiplexer 114 and restores the original digital audio signal. The first digital-to-analog converter 120 converts the digital video signal from the video decoder 116 into an analog video signal and outputs the analog video signal. The second digital-to-analog converter 122 converts the digital audio signal from the audio decoder 118 into an analog audio signal and outputs the analog audio signal. The system controller 124 has a function of controlling and managing the entire system including the above-described configuration, and a microcomputer or the like is mainly responsible for such a function. The user interface 126 receives commands / instructions or information from the user by means of a remote controller or the like and transmits the command / instruction or information to the system controller 124. Examples of user commands include such things as recording or reproducing some multimedia information or instructing a trick play to the audio / video signal recording / reproducing apparatus.

The conventional audio / video signal recording / reproducing apparatus as shown in FIG. 1 performs two modes, and the modes become recording and reproducing modes, respectively. In the recording mode, audio / video signals input from an external source are first digitally converted and compressed in the MPEG 2 format for video data and MPEG 1 or AC-3 format for audio data. Each of the compressed video and audio data is multiplexed, and additional data such as time information or pointer information for navigation is added to the multiplexed stream if necessary. The recording mode is ended by recording such multiplexed information on the HDD. In the playback mode, the data recorded on the HDD is first read. The read data is separated into audio, video and additional data through demultiplexing, and the audio and video data are each extended in the form of an original digital signal and output to a display device such as a TV through digital / analog conversion.

In the above-described conventional audio / video signal recording / reproducing apparatus, when audio / video data is recorded on a predetermined recording medium, audio / video data is recorded in real time, and file system information or navigation information related to the data is audio. After recording of video data is completed, record in a separate recording area. If recording is stopped due to external factors such as power off during recording of audio / video data, file system information, navigation information, and the like related to the audio / video data recorded up to that time cannot be recorded. Therefore, even though audio video data is recorded on the disc, the audio video data cannot be reproduced because there is no file system information and navigation information associated with the audio video data.

The technical problem to be achieved by the present invention is to record data on a recording medium, and to separately store the relevant information necessary for data reproduction, so that when the emergency occurs, the data recording control to restore the data recorded up to that time by referring to the relevant information. To provide a method.

In order to solve the above problems, a data recording method on a recording medium on which first information is reproduced according to second information stored in a data information area, the method comprising: setting a value of an index indicating that recording is before completion; Recording part of the first information and recording second information which is related information about the recorded first information; Recording the remaining part of the first information and updating the relevant information as much as the part recorded in the second information; Repeating an operation of recording a portion of the first information and updating the second information until all recording of the first information is completed; Recording second information in the data information area after finishing recording of the first information and updating of the last information about the last first information; And setting a value of the index to a value indicating the end of recording.

Preferably, the second information is stored in a memory other than the recording medium.

Preferably, the first information is audio / video data, and the second information is information on an aspect in which the first information is recorded on a recording medium.

Preferably, the second information is recording area information, file generation information, time information, and program information of the first information.

In order to solve the above problems, a data recording control method for controlling data recording in a recording / reproducing apparatus including a recording medium on which first information is reproduced according to second information stored in a data information area and predetermined storage means, Reading second information from the recording medium and determining whether recording has been normally completed before; Recording information stored in the predetermined storage means in a data information area on the recording medium when it is determined that the operation is not normally terminated; And reproducing first information according to the information recorded in the data information area.                     

Preferably, the second information includes index information indicating whether or not recording is normally completed and information relating to reproduction of the recorded first information.

In order to solve the above problems, a data recording control method for recording data on the recording medium from a data recording / reproducing apparatus having a recording medium including a second information recording area and a first information recording area and predetermined storage means is provided. A first step of setting a predetermined value of an index indicative of the end of recording in the second information recording area; A second step of recording data to be recorded in a first information area, generating relevant information about the recorded first information, and recording it in the predetermined storage means; A third step of recording the other data input for recording in the remaining area of the first information recording area, generating relevant information on the recorded data and further storing in the predetermined storage means; Repeating the third step until all the recording of the data to be recorded is completed and recording the information contained in the predetermined storage means in the second information recording area when the recording is completed; Setting the index value of the second information recording area to be a value indicating the end of recording; When the data recording and reproducing apparatus is turned on, determining whether an end of recording is read by reading an index from a second information recording area of the recording medium; And copying the information recorded in the predetermined storage means to the second information recording area of the recording medium when the index indicates that recording is not finished.

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

2 is an embodiment of a signal recording / reproducing apparatus for explaining the present invention, and includes a recording unit 200, a reproducing unit 210, a main storage unit 220, and an auxiliary storage unit 230. The recording unit 200 encodes and multiplexes a signal to be recorded.

The detailed configuration of the recording unit 200 includes the first and second analog / digital converters 201 and 202, the video encoder 203, the audio encoder 204, and the multiplexer 205. The first analog-to-digital converter 201 converts a video input signal in analog form into a digital signal. The second analog-to-digital converter 202 converts an audio input signal in analog form into a digital signal. The video encoder 203 compressively encodes the digital video signal from the first analog-to-digital converter 201. Typically, the video signal is compressed by the MPEG2 method. The audio encoder 204 compresses and encodes the digital audio signal from the second analog-to-digital converter 202. Compression of the audio signal is performed using MPEG1 or AC-3 (Audio Coding-3). The multiplexer 205 multiplexes the compressed signals output from the video encoder 203 and the audio encoder 204. That is, the video compression signal and the audio compression signal are arranged together in one frame together with a header for each information unit. The signal multiplexed by the multiplexer 205 is stored in the main storage unit 220.

The reproducing unit 210 demultiplexes the data stored in the main storage unit 220 and the auxiliary storage unit 230, decodes and converts the analog signal into an output signal. The detailed configuration of the playback unit 210 is composed of a demultiplexer 211, a video decoder 212, an audio decoder 213, and first and second digital-to-analog converters 214 and 215. The demultiplexer 211 separates the video / audio multiplexing signal read out from the main storage unit 220 into a video signal and an audio signal, respectively. The video decoder 212 decompresses the compressed video signal separated by the demultiplexer 211 and restores the original digital video signal. The audio decoder 213 extends the compressed audio signal separated by the demultiplexer 211 and restores the original digital audio signal. The first digital-to-analog converter 214 converts the digital video signal from the video decoder 212 into an analog video signal and outputs it. The second digital-to-analog converter 215 converts the digital audio signal from the audio decoder 213 into an analog audio signal and outputs the analog audio signal.

The main storage unit 220 corresponds to a recording medium storing data to be recorded and reproduced, and stores data input through the recording unit 220. For example, the main storage unit 220 may include a hard disk drive (HDD) interface 221 and an HDD 222, and the HDD interface 221 may include multiplexed signals from the multiplexer 205. Interface to be stored in In this case, the interface method used is an ATA (Advanced Technology Attachment) method mainly used in personal computers.

The auxiliary storage unit 230 is a memory in which relevant information necessary for reproducing data stored in the main storage unit 220 is stored. If the data stored in the main storage unit is audio / video data, the auxiliary storage unit 230 includes states in which the audio / video data is recorded in the main storage unit, for example, the main storage unit recording area, file generation information, time information, and program / cell. Information is recorded. Generally, such related information is generated after all audio / video data to be recorded is recorded and stored in a specific area of the main storage unit 220. However, in the present invention, audio / video data having a predetermined length is recorded in the main storage unit 220. Immediately after the recording, the relevant information is generated and stored in the auxiliary storage unit 230 and the recording ends, or when the system starts after the recording is abnormally terminated, the data stored in the auxiliary storage unit 230 is stored in the main storage unit 220. To the specific area. Each component of the system described above is controlled and managed by the system controller 240, and a microcomputer or the like corresponds to such a system controller. In addition, the above-described system may further include a key input unit 250 for receiving a command from a user to perform a predetermined function such as recording, playback, trick play, or the like.

3 is a data recording structure of the present invention recorded on a recording medium. When A / V data or the like to be recorded and reproduced is recorded in the recording area as the first information 300, the recording position or program / cell of the recorded first information is shown. The second information 310, which is related information required for reproducing the first information such as information, file generation information, and time information, is stored in a specific area on the recording medium. Index information 320 indicating whether or not normal termination is recorded is recorded.

FIG. 4 is a flowchart illustrating a data recording method of the present invention, wherein in the data recording / reproducing apparatus of FIG. 2, a recording medium on which first information is reproduced according to second information stored in a data information region, which is a specific region of FIG. In the method of recording data to the main storage unit 220 of FIG. 2, first, a value of an index indicating that recording is to be ended before recording is started is set to a predetermined value (eg, “1”) (step 400). The index is written in the area for recording the second information of the recording medium, and is used as the basis for determining whether or not recording is normally completed when the recording is first read during reproduction. In the first information area of the main storage unit 220, A / V information, that is, compressed first information, is recorded in a predetermined unit, and second storage unit 230 is generated by generating second information which is related information about the first information. Save and update in step 410. The update of the second information refers to a change operation such that additional A / V information is further recorded in the first information area, further generating second information related to the corresponding record information, and adding the second information related to the stored information in the auxiliary storage unit 230. do. When the recording end command is sent while repeating the recording operation as in step 410 (step 420), all the second information stored in the auxiliary storage unit 230 is copied to a specific area which is a data-related information area on the main storage unit 220 (430). step). The setting value of the index is converted to, for example, "0" to indicate that recording is normally completed (step 440). With this recording method, even when the system was suddenly turned off in the middle and recording was stopped before the index value was set to "0", the index setting value "1" was read at system restart and the recording was not terminated normally. After the sound is determined, the second information stored in the auxiliary storage unit 230 is first copied to the second information area 310 so that the first information recorded up to that time is not recorded again.

FIG. 5 is a flowchart of a recording control method performed at system startup in the recording / reproducing apparatus of which recording is performed as shown in FIG. 4. When the system as shown in FIG. 2 is turned on, index information recorded in a specific area of the main storage unit 220 is read (step 500). After determining whether the index is a value set before the normal end of the recording (step 510), if the index has information set to a value that is set before the normal end, for example, "1", the information stored in the auxiliary storage 230 is stored in the main storage unit. The second information 310 is copied to the above-described specific area of the image 220 as the second information 310 (step 520). The control command received through key input is performed (step 530).                     

6 is a flowchart of a data reproducing method of the present invention, when reproducing recorded data by performing the same process as in FIG. 4 or 5, first, a part of first information that a user wants to reproduce is selected (step 600). The second information, which is related information of the selected first information, is read from a specific area of the main storage unit 220, and the first information (or A / V data) compressed in a predetermined unit in the main storage unit 220 is found (step 610). . The read first information is reproduced (step 620).

According to the present invention, even in an emergency situation in which data is recorded on the recording medium, the relevant information generated with respect to the data recorded up to then can be stored and reproduced normally.

Claims (11)

A data recording method on a recording medium on which first information is reproduced in accordance with second information stored in a data information area, Setting a value of an index to a predetermined value indicating that recording is to be finished; Recording part of the first information and recording second information which is related information about the recorded first information; Recording the remaining part of the first information and updating the relevant information as much as the part recorded in the second information; Repeating an operation of recording a portion of the first information and updating the second information until all recording of the first information is completed; Recording second information in the data information area after finishing recording of the first information and updating of the last information about the last first information; And And setting the value of the index to a value indicating the end of recording. The method of claim 1, And said second information is initially stored in a peripheral memory of said recording medium. The memory device of claim 2, wherein the peripheral memory includes: A data recording method on a recording medium, characterized in that it is a flash memory. The method of claim 1, Wherein the first information is audio / video data, and the second information is information on an aspect in which the first information is recorded on the recording medium. The method of claim 4, wherein And the second information includes recording area information, file generation information, time information, and program information of the first information. The method of claim 1, And the index information is included in the second information. A data reproducing method on a recording / reproducing apparatus comprising a recording medium on which first information is reproduced in accordance with second information stored in a data information area, and predetermined storage means. Reading second information from the recording medium and determining whether recording has been normally completed before; Recording information stored in the predetermined storage means in a data information area on the recording medium when it is determined that the operation is not normally terminated; And And reproducing first information according to the information recorded in the data information area. The method of claim 7, wherein And the second information includes index information indicating whether or not recording is normally completed, and information relating to reproduction of the recorded first information. A data recording control method for recording data on a recording medium from a data recording / reproducing apparatus having a recording medium including a second information recording area and a first information recording area, and predetermined storage means. A first step of setting a predetermined value of an index indicating before recording end in the second information recording area; A second step of recording data to be recorded in a first information area, generating relevant information about the recorded first information, and recording it in the predetermined storage means; A third step of recording the other data input for recording in the remaining area of the first information recording area, generating relevant information on the recorded data and further storing in the predetermined storage means; Repeating the third step until all the recording of the data to be recorded is completed and recording the information contained in the predetermined storage means in the second information recording area when the recording is completed; Setting the index value of the second information recording area to be a value indicating the end of recording; When the data recording and reproducing apparatus is turned on, determining whether an end of recording is read by reading an index from a second information recording area of the recording medium; And And copying the information recorded in the predetermined storage means to the second information recording area of the recording medium when the index indicates that recording has not been completed. The method of claim 9, Wherein the first information is audio / video data, and the second information is information on an aspect in which the first information is recorded on the recording medium. The method of claim 9, And the second information includes recording area information, file generation information, time information, and program information of the first information.

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