Equipment and method for recording and reproducing moving image

The first device for recording/reproducing moving images and the method for reproducing moving images This application is an application date of February 21, 2000, application number 00102384.5, entitled "Apparatus and method for recording/reproducing moving images and recording medium Divisional application of patent application.

TECHNICAL FIELD The present invention relates to the field of moving images, and more specifically, the present invention relates to an apparatus and method for recording and/or reproducing status information related to audio for moving images.

2. Description of the Related Art Nowadays, the development in the field of digital compression technology and the increase in the capacity of recording media have enabled moving image information to be compressed into digital data and recorded. Compression technology includes various standards. In terms of video, the most widely used is MPEG (Moving Picture Experts Group)-2 video (ISO/IEC 13818-2) MP@ML (Main Profile at Main Level) with the same image quality as current analog TV. The main profile on the layer) standard (a moving image compression and file format standard). The use of the MPEG-2 MP@HL (Main Profile at High Level) standard that can achieve the image quality of high-definition television (HDTV) is rapidly increasing. In terms of audio, North America and surrounding areas generally use AC (Audio Coding)-3, and European countries are using MPEG 1/2 audio (ISO/IEC 13818-3) standards. The total amount of audio data is less than the total amount of video data, so that the linear pulse code modulation (LPCM) standard, which has no compression function, can also be applied to audio.

In this way, audio data and video data are signal-processed according to their respective standards, and then they are combined into data in the form of a bit stream. At this time, the MPEG-2 system (ISO/IEC 13818-1) standard is widely used. That is, each of audio data and video data is grouped into information packets, and identification information used to identify audio and video, buffer control information, and a time stamp used to synchronize the audio signal with the video signal ( Timing information is added to each packet. The time stamp information related to the clock signal used by the decoder is also added to each information packet, and finally the packet data is formed. Here, the Digital Versatile Disk (DVD) video standard stipulates a

02140963.3 The size of the first data packet is 2048 bytes.

A general moving image recording device includes several important functions. Among these functions, there is a post-recording function that only replaces and rewrites the audio part of the moving image data that has been recorded on the recording medium in the future. The existing analog recording medium contains a track in which a video signal and an audio signal for a moving image are separately recorded, so that the post-recording function can be easily implemented. In addition, the analog signal is not recorded in a specific recording unit, so that the operation required for post-recording is completed by overwriting the desired portion.

Here, the audio that has been recorded initially is called the original audio, and the audio that is replaced and recorded later is called the secondary audio. In order to preserve the original audio when recording the secondary audio, it is necessary to prepare two audio tracks that separately record the original audio and the secondary audio. Therefore, the original audio and the secondary audio are distinguished from each other by their track positions.

When two tracks are played back at the same time, only the secondary audio signal is output when the audio signal exists in the track for the secondary audio, otherwise, the audio signal existing in the track for the original audio is output. In this way, it is possible to reproduce the secondary audio that has been partially recorded on the track. When it is desired to reproduce only the original audio, the audio signal on the original audio track can be reproduced regardless of the presence or absence of the audio signal on the secondary audio track.

However, in digital recording media, audio/video (Α/V) signals have been mixed together and recorded in the recording area of a predetermined recording unit without categorizing them, resulting in the heavy use of analog recording media. The recording and reproduction of secondary audio by the writing method becomes impossible.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a playback method for selectively reproducing original audio or secondary audio according to audio status information.

Another object of the present invention is to provide a recording device for dividing moving image data into a plurality of basic units, generating basic unit information related to each basic unit, and storing audio state information in the basic unit information.

Another object of the present invention is to provide a reproducing device for selectively reproducing original audio or secondary audio according to audio status information.

In order to achieve the first object of the present invention, the present invention provides a method of replaying a recording medium on which image data is divided into a plurality of basic units, and basic unit information related to the image data is recorded In each basic unit, each of the basic units includes the number of videos

02140963.3 At least one of data, audio data, and graphics data, where the audio data includes first audio or first audio and second audio, and the basic unit information includes first state information about the first audio, and when there is a second audio When the image data is reproduced, the method further includes second status information about the second audio, and the method includes: before reproducing the image data, reading the status information about the first audio and the status information about the second audio when the second audio is present; and Before reproducing the image data, report the read status information to the user, where the first status information about the first audio represents the original audio status where the first audio is the original audio, or where the first audio is part or all of the original audio The modified audio state of the above modification, and when the second audio exists, the second state information about the second audio represents the state in which the second audio is the original audio, and the second audio is in the part of the original audio that is the second audio Or a state in which the second audio is completely modified, a state in which the second audio is the same dummy audio as the first audio, or a state in which the second audio is modified in part or all of the dummy audio as the second audio.

In order to achieve the second object of the present invention, the present invention provides a moving image recording device that records moving image data and moving image data information related to the moving image data on the recording medium, wherein the moving image data includes video data and At least one of the audio data, the moving image recording device includes: a recording controller for recording the first audio or the first audio and the second audio as audio data, wherein the first status information about the first audio and the second audio The second state information about the second audio when the audio exists is included in the moving image data information, and the first state information about the first audio represents the original audio state where the first audio is the original audio, or where the first audio is in the The modified audio state modified on part or all of the original audio, and when the second audio exists, the second state information about the second audio represents the state of the original audio when the second audio is the second audio, and the second audio is the second audio The state where part or all of the original audio is modified, the state where the second audio is the same mute audio as the first audio, or the state where the second audio is modified on part or all of the mute audio as the second audio .

In order to achieve the third object of the present invention, the present invention provides an apparatus for reproducing a recording medium on which moving image data including video data and audio data and motion related to the moving image data are recorded. Image data information, where the audio data includes first audio or first audio and second audio, and the moving image data information includes first state information about the first audio, and a second state about the second audio when the second audio is present Information, the state information about the first audio represents the original audio state in which the first audio is the original audio, or the modified audio state in which the first audio is modified on part or all of the original audio, and when the second audio exists, about The status information of the second audio represents the first status in which the second audio is the original audio, and the second audio is in the

02140963.3 The second state where part or all of the original audio as the second audio is modified, the third state where the second audio is a dummy audio that is exactly the same as the first audio, or where the second audio is the second audio Part or all of the dummy audio is modified on the fourth state, the device includes: a reproduction controller for reproducing the original audio and modifying the audio according to the first state information and the second state information when the second audio is present.

BRIEF DESCRIPTION OF THE DRAWINGS Through detailed description of the preferred implementation of the present invention in conjunction with the accompanying drawings, the above-mentioned objects and advantages of the present invention will become more clear. In the accompanying drawings: Figure 1 is a block diagram of an optical recording/reproducing device applying the present invention; 2 shows the hierarchical structure of moving image data drawn to facilitate the understanding of the present invention; Figures 3A and 3B show the video object (VOB) shown in Figure 2; Figures 4A to 4D show the package shown in Figure 3 Figure 5 shows an example of the structure of the audio status information in the video object information (VOBI) according to the present invention; Figure 6 shows when only the first audio exists, from before the secondary audio is re-recorded to the secondary The state change after the audio has been re-recorded; and Figure 7 shows the state change from before the secondary audio is re-recorded to after the secondary audio has been re-recorded when both the first and second audio are present.

BEST MODE FOR CARRYING OUT THE INVENTION The digital versatile disc (DVD) video recorder shown in FIG. 1 is suitable for use as a preferred embodiment of a recording device and a reproducing device to which the present invention is applied.

Referring to FIG. 1, modules 102 to 114 are for reproduction, and modules 116 to 126 are for recording. The reproduction device may include a module only for reproduction, and the recording device may include a module only for recording. The optical pickup unit 100, the keyboard input unit and the display 128 for interacting with the user and displaying the user interface, and the system controller 130 for controlling the operation of each module are included in both the recording device and the reproducing device.

A typical recorder has the ability to record and reproduce, so that all modules can be installed in one device. Therefore, in the present invention, when the recording device is used for reproducing operation, it may be

02140963.3 The first reproduction device.

In the work of a module in a general reproduction device, the optical pickup unit 100 includes an optical system for reading a signal from a recording medium and converting the read signal into an electrical signal, and for moving the optical system so that the optical system is in position A mechanism for reading and writing data on a predetermined location on a recording medium. This mechanism is controlled by the digital servo unit 102. A radio frequency (RF) amplifier (AMP) 104 amplifies the electrical signal read by the optical system from the recording medium, and provides the resultant signal to the data decoder 106. In addition, the RF amplifier 104 provides a servo signal used to correct the position of the optical system to the digital servo unit 102. The data decoder 106 amplifies the output of the RF amplifier 104 according to an appropriate signal level (referred to as a binarization level). The electrical signal is converted into a digital signal represented by "0" and "1" levels. The digital signal has been modulated according to the recording characteristics of a typical recording medium. And, the data decoder 106 demodulates the digital signal according to the demodulation mode corresponding to the modulation mode used at the time of modulation. The demodulated digital signal is an error correction code (ECC) signal, and a parity check is connected to the error correction code signal to correct errors caused by scratches, blemishes or similar defects on the recording medium. The data decoder 106 corrects the generated errors by decoding the demodulated data by error correction, and provides the error correction coded data to the audio/video (A/V) decoder 108. The data output by the data decoder 106 has a format in which at least one of video data, audio data, and graphics data has been compressed. Since audio data has a smaller amount of information relative to the amount of video data, the audio data may not be compressed. Video data is typically compressed in accordance with the MPEG standard. The graphics data is compressed according to a lossless compression mode in which no information is lost. The A/V decoder 108 decodes the video, audio, and/or graphics data according to respective compression modes to restore the video, audio, and/or graphics data. In particular, graphic data is mixed with video data.

The memory 110 connected to the A/V decoder 108 temporarily stores the data received by the A/V decoder 108 before the data is decoded, or temporarily stores the restored data before the data is output. Next, the data provided by the A/V decoder 108 is converted and output to the output device. That is, the video digital/analog converter (DAC) 112 converts the restored digital video data into an analog video signal, and outputs the analog video signal to a television or monitor. The audio DAC converter 114 converts the restored digital audio data into an analog audio signal, and outputs the analog audio signal to a speaker or an audio amplifier. The TV, monitor, speaker, and audio amplifier as the final output device are not shown in Figure 1.

In the work of the module in the recording device, the audio signal or video is received from the external input device

02140963.3 The first signal. Here, the external input device can be a TV, a video camera, or other similar devices, which are not shown in Figure 1.

The received video and audio signals are in analog or digital form, and are properly preprocessed and converted into digital data. In Figure 1, the received analog video and audio signals are. More specifically, the video pre-processor 116 performs functions such as filtering operations that minimize secondary effects generated when the analog signal is converted into digital data, and then converts the analog video signal into a digital video signal. The audio pre-processor 118 performs functions such as filtering operations that minimize secondary effects generated when the analog signal is converted into digital data, and then converts the analog audio signal into a digital audio signal. The A/V encoder 120 compresses digital audio and/or video signals to reduce the amount of audio data and/or video data, and appropriately processes the compressed audio and/or video signals. That is, video is typically encoded in a compression mode called MPEG video (ISO/IEC 13818-2), and audio is typically encoded in a compression mode such as AC-3 or MPEG audio (ISO/IEC 13818-3) . However, since audio has a smaller amount of data relative to the amount of video data, audio may not be compressed. A common practice is to add information based on the MPEG system (ISO/IEC 13818-1) standard to the encoded video data and the encoded audio data. This information is required to compare video data and audio data Each of them is decoded, and can be information about buffer occupancy control during decoding, and time stamp information required to synchronize the audio signal with the video signal.

Graphical data is typically received by dedicated input devices. Another alternative is that the graphic data is generated by the system controller 130 receiving user input, compressed by a dedicated compressor, and mixed with the A/V data. In the A/V encoder 120, compression and mixing of graphics data can be performed. However, the graphic data part is not shown in Figure 1.

The memory 122 connected to the A/V encoder 120 temporarily stores the data received by the A/V encoder before the received data is encoded, or temporarily stores the encoded data before the encoded data is output. The data encoder 124 error correction encodes the encoded data output by the A/V encoder 120, and modulates the error correction encoded data according to the recording characteristics of the recording medium. The laser diode (LD) power controller 126 uses a laser beam to transmit an optical signal corresponding to the data output from the data encoder 124 onto the recording medium, thereby completing the recording work.

The keyboard input unit and display 128 used to allow the user to interact with the recording or reproducing device receives instructions such as reproduction start, reproduction stop, recording start or recording stop from the user, and transmits the received instructions to the system controller 130, and displays the commands in the menu The user's selection is displayed on the upper, on the on-screen display (OSD), or on the on-screen graphics (OSG). The system controller 130 will be based on each operation set by the user.

02140963.3 The functions required by the first command are transferred to all modules, and these modules are controlled to complete the operation set by the user.

The A/V decoder 108 and the A/V encoder 120 separately installed in FIG. 1 can be integrated into a single module capable of encoding and decoding. Moreover, the memory 110 for decoding and the memory 120 for encoding may also be integrated into a single memory.

It can be seen that when the optical recording/reproducing device shown in FIG. 1 records moving images on a recording medium, it uses recording modules 116 to 126 and 100 to divide the moving image information into a plurality of basic units and record these on the recording unit. Multiple basic units. The system controller 130 generates information required for reproduction/encoding of each basic unit, and manages this information as basic unit information. The basic unit information generated by the system controller 130 is recorded on the recording medium through the data encoder 124, the LD power controller 126, and the optical pickup unit 100.

Here, the basic unit includes at least one of video data, audio data, and graphic data. In particular, audio data includes only one type of audio, or includes first audio and second audio. When the user records the secondary audio, the secondary audio is recorded on part or all of the first audio or the second audio, and the modified state of the first audio or the second audio is the first audio in the basic unit information Or the status information of the second audio. In the case of DVD video recording as a preferred embodiment of the present invention, the basic unit is called a video object (VOB), and the basic unit information is called video object information (VOBI) = at the time of reproduction, the system controller 130 checks The first or second audio status information stored in the basic unit information reproduced by the optical pickup unit 100, the RF AMP 104 and the data decoder 106, and the keyboard input unit and the display 128 are controlled to display the basic unit information on a menu or similar interface. The audio status information in the unit information so that the user can recognize the audio status information. Therefore, according to the user's selection, the audio data in the moving image data recorded in the plurality of basic units on the recording medium is reproduced by the modules 100 to 114 for reproduction shown in FIG. 1. This aspect will be described later in conjunction with Figures 5 to 7.

In order to facilitate the understanding of the present invention, the layered structure of the moving image data will now be described with reference to FIG. 2.

When the user records the moving image data, the moving image data is actually recorded on the recording medium using the modules 116 to 126 for recording shown in FIG. 1. In DVD video recording, each recorded data is divided into multiple units of video objects (VOB). In other words, the moving image data recorded during the period from when the user presses the recording start button until the user presses the recording stop button

02140963.3 The first is a VOB.

A plurality of VOBs are recorded on the recording medium, for example, VOB#1, VOB#2, and VOB#3 shown in FIG. 2. As described above, video data, audio data, and graphics data are mixed together and recorded in a VOB. In the present invention, these VOBs are called real-time bitstream data, and in the case of DVD video recording, each VOB is recorded in a single file.

When reproducing, the recorded VOB is decoded and reproduced by the modules 100 to 114 for reproduction shown in FIG. 1. It is useful to separately record the information required for VOB reproduction. For example, the width and length (resolution) of the video data in the corresponding VOB, the encoding mode of the audio data, etc. can be recorded separately. In addition, when the VOB has been encoded at a variable bit rate (VBR), the position of the data in the VOB does not match the reproduction time. Therefore, the position of the recorded data is separated according to the reproduction time to complete specific reproduction like time search. The function is useful. These data make up VOBI, that is to say. VOBI (VOBI#1, VOBI#2, and VOBI#3 shown in FIG. 2) exist in each VOB, and each VOBI includes information required to reproduce or edit the corresponding VOB.

For the user, a program can be a unit of moving image information. That is, the user understands that there are multiple programs recorded on the recording medium. In DVD video recording, the relationship between a program and a VOB is as follows, that is, a program includes multiple cells, and one cell represents a part or all of a VOB. Therefore, one program contains part or all of multiple VOBs.

Generally speaking, a program includes one cell, and one cell corresponds to a complete VOBo. Here, when responding to instructions from the user (for example, partial deletion of programs, merging of programs, or generating a program in the order desired by the user ) When editing a program, the format of the program is slightly more complicated than the general format described above.

Information related to multiple programs constitutes program chain information (PGC 2), and VOBI and PGCI constitute navigation data. That is, a real-time bit stream as moving image data and navigation data as information required to reproduce the moving image data are recorded on the recording medium together.

As mentioned above, the program is finally recognized by the user. Here, the program is delivered to the user through the use of a menu or similar interface. The menu corresponding to each program (for example, program #1, program #2, and program #3 shown in FIG. 2) is displayed. When the user selects program #η, the cells related to this selected program are searched, and the corresponding parts of the VOB indicated by these cells are reproduced. The information required for this reproduction can be obtained from the corresponding VOBI.

3A and 3B show the internal structure of the VOB shown in FIG. 2. Refer to Figures 3A and 3B,

02140963.3 The first VOB includes multiple video object units (VOBU), and each VOBU includes multiple video packs, audio packs, and/or graphics packs. VOBU is related to the method of encoding video data. The MPEG standard used as a video encoding method utilizes the correlation between frames of moving image data.

In a moving image data composed of dozens of frames per second, generally, each frame contains the same information. For example, in the case of a moving image in which a human body moves, the background of each image remains unchanged. There is only a small amount of motion caused by the human body in each frame. Therefore, the first frame is all recorded, and in the subsequent frames, only the part that is different from the previous frame is recorded. In this way, the total amount of data to be recorded is significantly reduced.

The MPEG coding method conceptually uses such a coding method. In this case, there is also a shortcoming, that is, the middle frame needs to be restored from the previous frame. Therefore, even when it is desired to reproduce the middle frame, all previous frames must be reproduced starting from the frontmost frame. MPEG uses a group of pictures (GOP) structure to overcome this shortcoming, that is, a group is composed of a predetermined number of frames, and all information about the frames in this group is recorded on the previous frame. In this case, in order to reproduce a certain intermediate frame, the first frame related to this intermediate frame in the GOP can start to be reproduced. A typical GOP is composed of 12 to 15 frames, and a VOBU includes multiple GOPs.

A VOBU includes multiple video packets, audio packets and/or graphics data packets generated based on the MPEG system standard format. Each package includes information about its type.

FIG. 3A relates to a case where one type of audio stream exists for one video stream generated as a packet, and FIG. 3B relates to a case where there are two types of audio streams for one video stream generated as a packet. When there are multiple types of audio streams as described above, the user can select and reproduce a desired type of audio stream.

The packet structure will now be described in more detail in conjunction with FIGS. 4A to 4D. A packet typically includes an information packet. In the case of DVD video recording, one packet requires at most two information packets. When two information packets are required, one of the two information packets must be a padding information packet that simply occupies one place in the data.

Each packet is divided into packet header and payload part. In the packet header, information indicating the type of the corresponding packet is recorded as a parameter called a stream identifier (stream_id). In the case of video, the stream identifier (streamjd) is the binary number "1110 0000b" shown in Figure 4A. In the case of audio, only MPEG audio can be represented by the stream identifier (stream_id) shown in Figure 4B. The streamed identifier (streamed) is 1100OOOxb. Here, "X" taking 0 or "1" can provide two types of audio.

02140963.3 When the audio is AC-3 audio or LPCM (linear PCM) audio, a process is also required to recognize AC-3 audio or LPCM audio, that is, AC-3 audio and LPCM audio have the same Its value is a stream identifier (stream_id) of "1011 1101b". The header information corresponding to AC-3 audio or LPCM audio is recorded in the payload part, and the real audio data follows the recorded header information. The header information includes a parameter called substream identifier substreamjd. In the case of AC-3, "1000 OOOxb" is stored in the substream identifier parameter (substreamjd) shown in FIG. 4D. In the case of LPCM, "lOlOOOOxb" is stored in the substream identifier parameter ^ (substreamjd) shown in FIG. 4C, where "χ" can be "0" or "1", so two types can be provided Audio. In the present invention, when "x" is "0", this situation is related to the first audio (audio 1), and when "x" is "1", this situation is related to the second audio (audio 2) related.

The first audio is used to record the basic original audio. Later, the user can record secondary audio on a part of the first audio. At this time, the original audio overwritten by the secondary audio is deleted.

The second audio can be used to record the original audio or to record the secondary audio. When the second audio is used to record the original audio, there are two original audio and the first audio, but when there is no first audio, the original audio cannot be recorded only on the second audio. When the second audio is the original audio, the user recognizes the second audio as the original audio from the beginning. Therefore, the first audio and the second audio have the same priority. When the secondary audio is recorded, either the first audio or the second audio is selected, and then, the secondary audio is recorded on the selected audio.

When the second audio is recorded as secondary audio from the beginning, then the following restrictions must be observed. At the time of initial recording, the second audio with the same content as that of the first audio must be recorded. That is to say, in terms of content, the second audio is the same as the first audio, so that the user cannot recognize the second audio. Such a state is called a mute audio state.

In this way, when the user wants to record the secondary audio later, the secondary audio is recorded on the corresponding part of the second audio in the dumb audio state. When the second audio is overwritten by the secondary audio in this way, it is first recognized by the user, and the user selects and reproduces one of the first audio and the second audio. Since the second audio is the same as the first audio except for the part where the secondary audio is recorded, the same content is reproduced even if the selection of audio is changed. The reason why the first audio having the same content as that of the first audio is recorded is that it is difficult for the digital recording medium to extract and reproduce the part where the secondary audio has been recorded. In other words, when the second audio is selected, if the second audio is reserved and only part of it is selected by the secondary

02140963.3 The first audio is occupied, then the audio cannot be reproduced from the part where the secondary audio is not recorded, which will cause confusion for the user.

Another method is that the first audio can be reproduced on the empty part of the second audio and the second audio can be reproduced on the part of the second audio on which the secondary audio has been recorded. However, in this case, a judgment must be made as to whether the audio has been recorded on the second audio, which makes it difficult to implement other methods.

In the present invention, the states of the first audio and the second audio are recorded on the corresponding VOBI in the VOB and before being reproduced from the corresponding VOBI in the VOB, or when the user has changed the audio during reproduction. The user knows the status before the status is used to complete the appropriate operation.

FIG. 5 shows an example of the structure of the first audio status information and the second audio status information in the video object information (VOBI) according to the present invention.

The first audio status information A0_STATUS represents the status in which the original audio has been recorded (00b), or the status in which part or all of the original audio is secondary audio (Olb). The status 00b represents that the first audio is the original audio. When the second audio is not recorded, the user records the secondary audio on part or all of the original audio. At this time, the first audio is overwritten by the secondary audio, and the status information of the first audio is changed from "00b" to "01b".

In addition to the two states described above, the second audio status information A1_STATUS may also be a dummy state 10b in which the content of the second audio is completely the same as the content of the first audio, or a part or all of the second audio has been The state of secondary audio rewriting (llb). Therefore, one of the four states in total is recorded as the second audio status information Al_STATUS. Therefore, the first audio status information A0_STATUS and the second audio status information A1_STATUS are defined as follows:

A0_STATUS:

00b···The first audio is the original audio.

01b···The first audio is a secondary audio that is re-recorded on part or all of the original audio.

A1_STATUS:

00b...The second audio is the original audio.

01b···The second audio is the secondary audio that is re-recorded on part or all of the original audio.

10b···The second audio is a dummy audio whose content is exactly the same as that of the original audio.

lb···The second audio is the secondary audio that is re-recorded on part or all of the mute audio.

02140963.3 In the method of using the first and second audio information, the case where the second audio is in the dumb audio state is the most important. When the status information representing that the second audio is dumb audio is recorded, the user feels as if the second audio is not recorded, and therefore, this status can be displayed on a menu or similar interface. At this time, even when the user completes the audio conversion function, the first audio can continue to be reproduced. That is, in the state "10b" representing dummy audio, the reproduction of the first audio may be set as a default.

When the second audio is in one of the three states 00b, 01b, and lib except for the dummy audio state 10b, the three states of the second audio indicate that audio data with content different from that of the first audio has been Was recorded. Therefore, the user knows this state of the second audio, so that the audio change can be realized. In particular, when the second audio status information A1_STATUS is the status lib of the secondary audio in which the second audio is re-recorded on part or all of the dummy audio, the reproduction of the second audio may be set as a default.

Therefore, in the present invention, by means of menus or similar interfaces, the user knows whether the first audio or the second audio is the original audio or the secondary audio re-recorded on part or all of the first audio or the second audio, This allows the user to recognize the audio status of the corresponding VOB.

Fig. 6 shows the state change from before the secondary audio is re-recorded to after the secondary audio is re-recorded when only the first audio exists. That is, Figure 6 shows the status of the first audio in the original audio state (A0_STATUS=00b), and only some of the original audio parts a5 to a8 are overwritten by the secondary audio b1 to b4 through rewriting/editing operations. Write status (A0_STATUS=0b)_oIn this case, the first audio status information A0_STATUS is updated from "00b" to "01b", and the change of the audio status can be displayed through the keyboard input unit shown in FIG. 1 and the menu or similar interface on the display 128 , Let the user know the change of the audio state.

FIG. 7 shows the state change from before the secondary audio is re-recorded to after the secondary audio has been re-recorded when both the first and second audio are present. When the first audio is the original audio (ie: A0_STATUS = 00b) and the second audio is in the dumb state (Al_STATUS = 10b) where the second audio is the same as the first audio, only the reproduction of the first audio is set By default, the direction of reproduction is indicated by a thick solid arrow.

FIG. 7 shows the second audio in a dumb audio state in which some parts a5 to a8 are overwritten by secondary audio b1 to b4. The second audio status information A1_STATUS is updated from "10b" to "lib".

"Here, the first audio remains in the original audio state (ie: A0_STATUS=00b).

A part of the second audio in the dumb state is overwritten by the secondary audio, and then the user passes the menu

02140963.3 The first single or similar interface realizes audio changes. At this time, the content of the audio being reproduced has changed, which is indicated by a thick solid arrow indicating the reproduction direction. That is, as shown in FIG. 7, the first audio a1 to a4 are reproduced first, and then, due to the audio change made by the user, the second audio b1 to b3 in the second audio are reproduced, and finally, due to the audio change made by the user, The first audio is reproduced from a8.

As described above, in the present invention, the audio state information related to the moving image obtained by recording/rewriting/editing is stored in the recording unit information VOBI corresponding to the recording unit VOB, and before the moving image is reproduced Inform the user of this audio status information so that the user can recognize the status of the audio. In addition, during the reproduction process, the user can appropriately handle the audio changes.

02140963.3