JP3437371B2 - Information recording device and information reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium such as a high density optical disc capable of recording information such as audio and video represented by a DVD at a high density, and information recording on the information recording medium. It belongs to the technical field of a recording device and a reproducing device for reproducing information from the information recording medium.

[0002]

2. Description of the Related Art Conventionally, a so-called CD (Compact Disc) is used as an optical disc on which information such as audio and video is recorded.
k), LDs (Laser Disks), etc. have become widespread. These LDs and the like can record audio information of a plurality of channels, for example, recording 1ch (channel) monaural sound and 2ch stereo sound at the same time and reproducing them simultaneously.
It can record surround sound of 3 systems and play it back simultaneously. When such multi-channel is used, a mode of combination arrangement of several kinds of speakers called an audio coding mode is set in advance, and a reproducing apparatus is used to determine in which mode the recorded audio information was recorded. It is necessary to record the surround mode information shown with respect to the LD and the like together with the audio information.

Taking the Dolby AC3 system as an example, FIG. 37 and FIG. 38 show this audio coding mode.
Will be explained. In the Dolby AC3 system, as shown in the table of FIG. 37, eight audio coding modes (1 + 1 to 3/2) are set, and 3-bit surround mode information is recorded in the LD or the like to indicate each mode. It Therefore, the audio coding mode to be reproduced in the reproducing apparatus can be determined by referring to the surround mode information (000 to 111). As shown in the table of FIG. 37, in the Dolby AC3 system, the number of speakers (5) arranged in the room and their locations (left, right, center, left surround, and right surround) are limited. Eight kinds of audio coding modes are prepared under the limitation. Therefore, when making a recording sound source (source), a combination other than these eight kinds of modes cannot be selected.

A typical arrangement of speakers limited in the Dolby AC3 system is, for example, the arrangement shown in FIG. In FIG. 38, inside the room 200, the listener position P0
With reference to, the left speaker SPl, the center speaker SPc, and the right speaker SPr are arranged as three speakers in the front, and the left surround speaker SPsl and the right surround speaker SPsr are arranged as two speakers in the rear.

As described above, according to the Dolby AC3 system, by preparing in advance a combination arrangement of eight types of speakers that are often used practically in the range of 5ch, 3-bit surround mode information (000 to 111). Using, it is possible to create a three-dimensional acoustic space at the listener position P0 by using audio signals of multiple channels.

Further, in these CDs and the like, audio information and video information are recorded together with time information indicating the time at which each piece of information based on the reproduction start position of each CD or the like should be reproduced. For this reason, in addition to general normal reproduction in which recorded information is reproduced in the order in which it is recorded, for example, in a CD, only a desired piece of music is extracted and listened to from among a plurality of recorded pieces of music. Alternatively, it is possible to perform playback such as listening by changing the playback order at random.

[0007]

However, according to the above-mentioned Dolby AC3 system, it is impossible to specify a free combination of 5ch such as a combination of 1ch in the front and 1ch in the rear, or a combination of 5ch in the front. There is.

Further, in the above CD or LD, the viewer has a choice with respect to the sound to be reproduced and the image to be displayed, and the viewer is rich in so-called interactive changes such as selecting and viewing them. There was a problem that it could not be regenerated. That is, for example, when watching a foreign movie recorded on an LD, a sound is selected (for example, either an English sound or a Japanese sound obtained by dubbing the sound is selected) to be output, It is not possible to select and display the language used for the subtitles displayed on the screen (for example, select either Japanese subtitles or original language subtitles).

On the other hand, at present, proposals and developments of a DVD, which is an optical disk in which the storage capacity is increased by about 10 times without changing the size of the optical disk itself, are being actively made in comparison with the conventional CD. According to the knowledge of the inventors of the present application, in such a large capacity DVD, a plurality of audio signal streams can be recorded, and furthermore, an audio signal of 8 channels at maximum can be recorded for each audio signal stream. It is believed that However, if, for example, an 8-channel audio signal is recorded here, the number of possible surround modes described above will be enormous, and even if only the combination arrangement of the speakers that are often used in practice is considered, it is a considerable number. Will rise to. Therefore, it is considered that it is impossible to specify the combination arrangement of the practically used speakers depending on the 3-bit information as in the conventional Dolby AC3 system shown in the table of FIG. Moreover, if the number of speaker combination arrangements that can be simply specified is increased, the number of combinations that must be prepared will become huge, and the surround mode information that specifies which speaker each channel corresponds to will be reversed. It may be difficult to understand and complicated to handle. Furthermore, the multi-surround system such as the Dolby AC3 system which has been conventionally used for a CD or the like is used for multi-channel (up to 8 channels) multi-stream (up to 8 streams) D.
Under the present circumstances, those skilled in the art have not recognized the problem itself when applying it to voice information on VD.

Therefore, an object of the present invention is to make it possible to relatively easily specify a variety of multi-speaker combination arrangements in an information recording medium in which audio information of a plurality of streams is recorded in a plurality of channels. An object is to provide an information recording medium, an information recording device for recording information on the information recording medium, and an information reproducing device for reproducing information from the information recording medium.

[0011]

[0012]

[0013]

[0014]

[0015]

[Means for Solving the Problems] To solve the above problems
The information recording apparatus according to claim 1 stores partial audio information.
Record information consisting of multiple partial record information contained in each
The reading means is moved relatively along the recorded track.
And a playback device that plays back the partial audio information in surround.
Record the partial audio information to be played back on the information recording medium.
It is an information recording device for
Multiple speeds present in a preset type of position
Before consisting of multiple channels that should be output from each
Write the partial audio information on the recording track, and
The partial audio information corresponding to each channel is
Of which speakers are output respectively
Based on surround control information indicating whether or not and the listener position
Which indicates the combination of the predetermined types previously set by
Sound mode information and the playback of each partial audio information.
Control set for each of the partial record information in order to control
Can be detected separately as the target data for each partial record information.
And a writing means for writing on the recording track.

According to the information recording apparatus of the first aspect,
The writing means writes partial audio information consisting of a plurality of channels.
While writing on the recording track,
Surround mode information and control data
Minute recording information can be separately detected and written on the recording track.
Mu.

Therefore, recording information is recorded from the information recording medium.
When playing back, first surround control information and surround
The mode information corresponds to the partial audio information to be played back.
If you read from the roll data area, it will be recorded in each channel.
The location of the partial audio information
Based on the listener position and whether each should be output from
Predetermined position of those speakers preset as quasi
The combination of types can be identified on the playback device.
It As a result, in the playback device,
Partial audio information can be output from the corresponding speaker.
It

According to a third aspect of the present invention, there is provided an information recording apparatus, wherein
Record information consisting of multiple partial record information, each containing voice information
Relative reading means along the recording track where the information was recorded
Playback to move to and play back the partial audio information in surround
Information recording medium for recording the partial audio information reproduced by the device
An information recording device for recording on the basis of the listener position.
Placed in a combination of predetermined types that are preset as
Multiple channels that should be output from each of the multiple speakers
On the recording track.
Write on and show the combination of the above specified types
Control the playback of each of the partial audio information.
Controller set for each partial audio information in order to
Can be detected separately for each partial audio information
And writing means for writing on the recording track.

According to the information recording apparatus of the third aspect,
The writing means writes partial audio information consisting of a plurality of channels.
Surround mode information as well as writing on the recording track
Is used as control data for each partial audio information
And detectably write to the recording track.

Therefore, the record information is recorded from the information recording medium.
When playing back the surround mode information first
Read from control data area corresponding to partial audio information
If this is the case, multiple preset positions based on the listener position will be used.
A predetermined type of combination of the position of the peaker is set in the playback device.
And can be identified. As a result, in the playback device,
The partial audio information of several channels is sent to the corresponding speaker.
Can be output from

In order to solve the above-mentioned problems, an information reproducing apparatus according to a fifth aspect of the present invention has a plurality of channels to be respectively output from a plurality of speakers existing at positions of a predetermined type preset with the listener position as a reference. before partial audio information consisting of together with being recorded, corresponding to the respective channels
Surround control information whose serial partial audio information indicating whether to be respectively outputted from the speaker of which position among the plurality of speakers, before to control the reproduction of each of said partial audio information
Control data set for each recorded information
Are recorded separately for each partial record information so that they can be detected.
An information reproducing apparatus for reproducing the partial audio information from an information recording medium , the partial audio information and the part
The information the previous Symbol surround control information corresponding to the minute audio information
A sound demodulation means for demodulating a reading that the reading means from the broadcast recording medium, the reading was partially <br/> audio information, the demodulated parts
An output unit that outputs the minute audio information for each of the plurality of channels based on the read surround control information, and the position of the speaker at which the partial audio information of each channel is output based on the read surround control information. display means for image display or to be output, characterized by comprising a.

According to the information reproducing apparatus of the fifth aspect ,
When the reading means first reads the surround control information corresponding to the partial audio information , the display means displays the partial audio information of each channel based on the surround control information. An image is displayed as to whether or not it should be output from the speaker at the position. Therefore, if the viewer arranges each speaker according to the position of the speaker displayed as an image and wires each speaker to the channel output of the corresponding reproducing apparatus, thereafter, the reading means reads the sound and further demodulates the sound. When the partial audio information demodulated by the means is output by the output means for each of a plurality of channels based on the surround control information described above, the partial audio information of the plurality of channels is actually output from the speaker to be output. . As a result, the surround sound field intended by the creator is accurately reproduced.

[0023] The information reproducing apparatus according to claim 6, partial audio information comprising a plurality of channels to be respectively outputted from the plurality of loudspeakers present in a preset predetermined type of position referenced to the Listener position recording Has been done before
Note that surround control information indicating from which speaker of the plurality of speakers the partial audio information corresponding to each channel should be output is provided for each of the partial audio information.
It is set for each partial record information in order to control the reproduction of the information.
As the control data for each part,
Separately from the information recording medium that is detectably recorded,
An information reproducing apparatus for reproducing partial audio information ,
Designating means capable specify the placement of real loudspeakers, the
A reading that the reading means before Symbol surround control information from the information recording medium corresponding to the partial audio information and the partial audio information, and the audio demodulation means for demodulating the read was partial audio information, the reading was surround control information based on the differences between the position of the specified speaker by the specifying means and the position of the speakers indicated by, the demodulated partials <br/> voice information to a channel corresponding to the arrangement of the designated speaker and said corresponding portion output means and outputting converted into audio information, characterized by comprising a.

According to the information reproducing apparatus of the sixth aspect ,
The position of the speaker of a predetermined type based on the listener position is set in advance, and the arrangement of the existing speakers is specified by the specifying means. During reproduction, by the reading means, first re
Surround control information corresponding to the partial audio information to be produced is read. Thereafter, the partial sound information read by the reading means and further demodulated by the sound demodulating means is based on the difference between the position of the speaker indicated by the surround control information and the position of the speaker designated by the designating means by the output means. Then, it is converted into partial audio information for each channel corresponding to the layout of the specified speaker and is output. As a result, even if the specified speaker arrangement does not match the speaker arrangement indicated by the surround control information, the surround sound field intended by the producer is simulated.

According to a seventh aspect of the present invention, there is provided the information reproducing apparatus, wherein the partial audio information is composed of a plurality of channels which are to be respectively output from a plurality of speakers arranged in a combination of a predetermined type preset with the listener position as a reference. And the surround mode information indicating the combination of the predetermined types is recorded for each partial audio information as control data set for each partial audio information in order to control the reproduction of each partial audio information. An information reproducing apparatus for reproducing the partial audio information from an information recording medium which is separately detectably recorded, wherein the partial audio information and the surround mode information corresponding to the partial audio information are transmitted from the information recording medium. Reading means for reading, audio demodulation means for demodulating the read partial audio information, and the demodulated partial audio information. The and an output means for outputting for each of the plurality of channels based on said read was surround mode information.

According to the invention of claim 7, the reading means
Provides partial audio information and corresponding surround mode information
Read from the information recording medium. The voice demodulation means
The demodulated partial audio information is demodulated. Then output means
Turns the demodulated partial audio information into surround mode information.
Based on this, it outputs for each of a plurality of channels. Thus, viewers multiple speakers arranged according to the combination of the gas speaker, if wired each speaker channel output of the corresponding reproduction apparatus, thereafter, as in the case of claim 5 described above, a plurality of The audio information of the channel is actually output from the speaker that should be output. As a result, the surround sound field intended by the creator is accurately reproduced.

According to a ninth aspect of the present invention, there is provided the information reproducing apparatus, wherein the partial audio information is composed of a plurality of channels to be output from a plurality of speakers arranged in a combination of a predetermined type preset with the listener position as a reference. And the surround mode information indicating the combination of the predetermined types is recorded for each partial audio information as control data set for each partial audio information in order to control the reproduction of each partial audio information. An information reproducing apparatus for reproducing the partial audio information from an information recording medium which is separately detectably recorded, the specifying means capable of specifying an arrangement of an existing speaker, the partial audio information and the partial audio information. Reading means for reading the surround mode information corresponding to the information recording medium from the information recording medium, and reproducing the read partial audio information. The demodulated partial audio information based on the difference between the position of the speaker indicated by the read surround mode information and the position of the speaker specified by the specifying unit. Output means for converting and outputting the partial audio information corresponding to the channel corresponding to the arrangement of the speakers.

According to the information reproducing apparatus of the ninth aspect ,
A combination of speakers of a predetermined type based on the listener position is set in advance, and the arrangement of the existing speakers is specified by the specifying means. At the time of reproduction, by the reading means,
First, the surround mode information corresponding to the partial audio information to be reproduced is read. After that, the partial sound information read by the reading means and further demodulated by the sound demodulating means is based on the difference between the position of the speaker indicated by the surround mode information and the position of the speaker designated by the designating means by the output means. Then, it is converted into partial audio information for each channel corresponding to the layout of the specified speaker and is output. As a result, even if the specified speaker arrangement does not match the speaker arrangement indicated by the surround mode information, the surround sound field intended by the creator is reproduced in a pseudo manner.

The information reproducing apparatus according to claim 12 is a listener
Exists in a predetermined type of position that is preset based on the position
Multiple channels to be output from multiple speakers
While the partial audio information consisting of the channel is recorded,
The partial audio information corresponding to each channel is
Which of the speakers is output from each speaker
Based on surround control information indicating whether or not and listener position
To indicate the preset combination of the predetermined types.
The round mode information indicates the playback of each partial audio information.
The control set for each partial record information for control.
Detected separately as roll data for each partial record information
The audio information is recorded from an information recording medium that is recorded as possible.
An information reproducing apparatus for reproducing the partial audio information.
Information and the surround control corresponding to the partial audio information
Information and surround mode information from the information recording medium
Reading means for reading and demodulating the read partial audio information
The audio demodulation means and the demodulated partial audio information
Surround control information read and surround mode
Output for each of the plurality of channels based on information
And means.

According to the information reproducing apparatus of the twelfth aspect , the reading means is configured to read the partial audio information and the corresponding surround sound information.
Control information and surround mode information from the information recording medium
Read. Then, the audio demodulating means reads the read partial audio.
Demodulate information. After that, the output means is demodulated
The partial audio information is converted to surround control information and surround sound information.
It is output for each of a plurality of channels based on the read information.

Therefore, the viewer can combine the speakers.
Place multiple speakers according to
If you wire it to the channel output of the playback device
After that, as in the case of claim 5 described above, a plurality of channels
Output from the speaker that should output audio information
To be done. As a result, the surround sound field intended by the creator
Accurately reproduced.

[0032]

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described. In addition, the embodiment described below describes an embodiment in which the present invention is applied to the DVD. (I) Embodiment of Information Recording Medium First, FIG. 1 to FIG. 6 are used for the physical and logical configuration and operation of a DVD which is one embodiment of the information recording medium to which the present invention is applied. Explain.

First, the recording format (physical recording format) of the video information and audio information on the DVD
This will be described with reference to FIG. As shown in Figure 1,
The DVD 1 of the embodiment has a lead-in area LI at its innermost peripheral portion and a lead-out area LO at its outermost peripheral portion, during which video information and audio information are respectively ID (identified). ) Multiple VTS3s with numbers
(VTS # 1 to VTS # n) are divided and stored. Here, a VTS (Video Title Set) is a related title (having the same attributes such as the number of streams of audio and sub-pictures, specifications, and supported languages) that a producer (such as a movie) tries to present to the viewer. A set of two works) is grouped together, and more specifically, for example, a plurality of movies having dialogues in different languages are recorded as titles for one same movie, or Even in the same movie, the movie version and the special version are stored as different titles. The video manager 2 is recorded at the beginning of the area where the VTS 3 is recorded. The information recorded as the video manager 2 is, for example, a menu indicating the name of each title, information for preventing illegal copying, an access table for accessing each title, or the like.
Information relating to the entire video information and audio information recorded on the DVD 1 is recorded.

Next, one VTS 3 starts with the control data 11 and has a plurality of VTSs each having an ID number.
It is divided and recorded in OB10. Here, a portion composed of a plurality of VOBs 10 is called a VOB set (VOBS). This VOB set includes control data 11 which is other data which constitutes VTS3,
In order to distinguish a plurality of VOBs 10 which are the entities of video information and audio information from each other, a VOB set is set for the relevant entity.

The control data 11 recorded at the beginning of the VTS 3 is PGCI (Program Chain) which is various information related to a program chain which is a logical division of a plurality of cells (cells will be described later).
Information) etc. are recorded. Also, each VOB
In addition to the control information, a substantial portion of the video information and the audio information (video or audio itself other than the control information) is recorded in 10.

Further, one VOB 10 is composed of a plurality of cells 20 each having an ID number. Here, one VOB 10 is configured to be completed by a plurality of cells 20, and one cell 20 is second VOB 10.
It does not straddle.

Next, one cell 20 is composed of a plurality of VOB units (VOBU) 30 each having an ID number. Here, the VOB unit 30 is an information unit including video information, audio information, and sub-picture information (referring to sub-picture information such as subtitles in a movie).

One VOB unit 30 includes a navigation pack 41, a video pack 42 in which video data as a video information piece is recorded, an audio pack 43 in which audio data as an audio information piece is recorded, and a sub-pack. The sub picture pack 44 records sub picture data as a video information piece. here,
In the video pack 42, a packet containing video information is recorded together with additional information such as its header, and in the audio pack 43, a packet containing audio information is recorded together with additional information such as its header. Also, in the sub-picture pack 44, a packet including graphic data such as characters and figures as sub-picture information is recorded together with additional information such as a header thereof. As shown in FIG. 1, a video pack 42 having a large amount of data is recorded as one or a plurality of GOPs inside one VOB unit 30, and an audio pack 43 and a sub-picture pack 44 are arranged between the video packs 42. Has been done.

It is specified by the standard that the DVD 1 can record 8 types of audio and 32 types of sub-image that can be recorded. Furthermore, the navigation pack 41 is always present in one VOBU 30, but the video pack 42, the audio pack 43, and the sub-picture pack 44 do not necessarily have to be present. Be free.

Finally, the navigation pack 41 uses search information (specifically, search information for searching for a video or audio to be displayed).
DVD on which the video and audio to be displayed are recorded
DSI (Data Search Inform) including the address above 1)
ation) packet 51 and a PCI (Pres) including information on display control when displaying a video or generating an audio that is searched based on the information of the DSI packet 51.
(entry control information) packet 50, and the video data included in the video pack 42 is composed of one or more GOPs (Group Of Pictures). It should be noted that the PCI packet 50 includes, for a selection item selected by the viewer, highlight information that defines the display and operation when the item is selected. Depending on the highlight information, for example, changes in screen display for the selected item on the screen displaying the item to be selected by the viewer (so-called menu screen), the display position to be changed, and the command (selected The command to be executed corresponding to the item is set.

Here, the video information for composing and displaying a frame, a selection button, etc. necessary for composing and displaying the menu screen is a sub-picture pack as the sub-picture data which is the above-mentioned sub-picture information. Recorded at 44.

Further, the GOP is an MPEG2 (Moving Picture Experts) which is an image compression method adopted when recording video information on the DVD 1 in the present embodiment.
It is the smallest image unit that can be reproduced independently as defined in the Group 2) system standard.

Here, the outline of the MPEG2 system will be described. Generally, in continuous frame images, the frame images before and after one frame image are
In many cases, they are similar to each other and have a mutual relationship. MPE
The G2 method pays attention to this point, and based on a plurality of frame images transferred with several frames separated, another frame image existing between the plurality of frame images is interpolated based on a motion vector or the like of the original image. It is a method to generate in.
In this case, when recording another frame image,
By recording only the information about the difference and the motion vector from the plurality of frame images, it becomes possible to reproduce the other frame image by predicting from the plurality of frame images at the time of reproduction by referring to them. . As a result, the image can be compressed and recorded.

As described above, the MP adopted in the present embodiment
In the EG2 system, a variable rate system in which the amount of data contained in each GOP 52 is not constant is adopted. In the above-described recording format having the hierarchical structure shown in FIG. 1, the manufacturer can freely set and record each section according to his or her intention. By performing reproduction for each of these sections based on the later-described logical structure, various reproductions rich in change are possible.

Next, a logical format (logical structure) in which information recorded by the physical divisions shown in FIG. 1 is combined will be described with reference to FIG. Note that the logical structure shown in FIG. 2 does not mean that information is actually recorded on the DVD 1 by that structure, but the data (particularly the cell 20) shown in FIG. 1 is combined in the logical structure shown in FIG. Information for reproduction (access information, time information, etc.) is recorded on the DVD 1, particularly in the control data 11.

To clarify the explanation, the lower hierarchy of FIG. 2 will be described. By selecting and combining a plurality of cells 20 from the physical structure described in FIG. The program 60 is logically constructed based on the producer's intention. The program 60 is also the minimum logical unit that can be accessed by a command by a system controller in the playback device, which will be described later. It should be noted that one or more programs 60 can be defined by the producer as the minimum unit that the viewer can freely select and view.
It is called TT (Part Of Title).

Further, one program 60 is used for a plurality of cells 2
Since 0 is selected and logically configured, one cell 20 is used in a plurality of programs 60, that is, one cell 20 is reproduced in a plurality of different programs 60, that is, so-called cell 20 reuse. It is also possible to do it.

Here, regarding the number of one cell 20,
When the cell 20 is handled in the physical format shown in FIG. 1, it is treated as a cell ID number (shown as cell ID # in FIG. 1), and in the logical format shown in FIG. It is treated as a cell number in the order of description. Next, by combining a plurality of programs 60, one PGC (Program Chain) 61 is logically configured based on the intention of the manufacturer. In the unit of PGC 61, the PGCI (Program Chain Informatio) described above is used.
n) is defined, and the playback order of the cells 20 of each program 60 when each program 60 is played back to this PGCI (this playback order assigns a unique program number to each program 60), Each cell 20
Of the recording position on the DVD 1, the number of the head cell 20 to be reproduced in one program 60, the reproduction method of each program 60 [When recording information on the DVD 1 of the present embodiment, during reproduction, Random playback (random playback using random numbers, and the same program 60 may be played multiple times), shuffle playback (random playback using random numbers similar to random playback, but the same program 60 is played only once. , The same program 60 is not played back multiple times.) Or loop playback (playing one PGC 61 multiple times) or by a combination of loop playback and random playback or shuffle playback. Playback method is PGC6
It is possible for the producer to select and play each one. ] And various commands (commands that can be specified by the manufacturer for each PGC 61 or cell 20) are included. The recording position of the PGCI on the DVD 1 is as described above.
It is in the control data 11 or in the control data (not shown) in the video manager 2 if it is PGCI related to the menu in the video manager 2 (see FIG. 1).

In addition, one PGC 61 has the above-mentioned PGCI.
In addition, substantive video and audio data are included as a combination of the program 60 (in other words, as a combination of the cells 20).

Furthermore, in one PGC 61, it is possible to reuse the cell 20 shown in the description of the program 60 (that is, the same cell 20 is used by different PGC 61). As for the cells 20 to be used, in addition to the method of reproducing the cells 20 in the order stored on the recording track on the DVD 1 (reproduction of cells continuously arranged on the recording track), the DVD 1
The manufacturer can select the method (reproduction of non-consecutively arranged cells) that reproduces regardless of the order stored in (for example, the cell 20 recorded later on the recording track is reproduced first). .

Next, one title 62 is logically constructed by one or a plurality of PGCs 61. This title 62
Is a unit corresponding to, for example, one movie, and is complete information that the producer wants to provide to the viewer of the DVD 1.

Then, one VTS 63 is logically constructed by one or a plurality of titles 62. This VTS6
The titles 62 included in 3 have common attributes, and for example, a movie in a different language for one same movie corresponds to each title 62.
Information corresponding to one VTS 63 shown in FIG. 2 corresponds to information included in one VTS 3 shown in FIG. That is, the logical VT shown in FIG.
All the information contained in S63 is recorded as one VTS3.

Based on the logical format described above, the producer designates the information divided in the physical structure on the DVD 1 to form a video (movie or the like) that the viewer should watch.

In the description of the physical structure shown in FIG. 1, a plurality of cells 20 have IDs for easy understanding of the contents.
Although it has been described that the data is recorded in the order of the numbers, in the DVD 1 of the embodiment, one cell 20 may actually be divided and recorded in a plurality of interleaved units IU shown in FIG.

That is, for example, as shown in FIG. 3, the manufacturer configures one PGC 61A with cells 20 having ID numbers 1, 2 and 4 and another PGC 61B with cells 20 having ID numbers 1, 3 and 4. In the case of reproducing information from the DVD 1 based on the PGC 61A, only the cells 20 having ID numbers 1, 2 and 4 are reproduced, and when the information is reproduced from the DVD 1 based on the PGC 61B. In this case, only the cell 20 having the ID numbers 1, 3 and 4 is reproduced. In this case, if the cells 20 are recorded separately for each ID number, for example, in the case of the PGC 61A, the cell 20DVD with the ID number 4 starts from the recording position on the DVD 1 of the cell 20 with the ID number 2.
It takes time to jump the pickup for reproduction to the recording position on the cell No. 1, and depending on the capacity of the track buffer in the reproducing apparatus described later, the cell 2 of the ID number 2
It becomes impossible to continuously reproduce the cell 20 of 0 and the ID number 4 (hereinafter referred to as seamless reproduction).

Therefore, in the case shown in FIG. 3, the ID number 2
Cell 20 of ID number 3 and cell 20 of ID number 3 have such a length that the continuity of the output signal is not lost even if the input of the input signal is temporarily stopped according to the speed of the input / output processing in the track buffer. The interleaved unit IU (that is, the length at which the output signal from the track buffer can be continuously output even if the input signal to the track buffer is interrupted due to the pickup jumping only during one interleaved unit IU). In the interleaved unit IU) of the PGC6.
When reproducing based on 1A, only the interleaved unit IU forming the cell 20 corresponding to the ID number 2 is continuously detected and reproduced. Similarly, when reproducing based on the PGC 61B, only the interleaved unit IU forming the cell 20 corresponding to the ID number 3 is continuously detected and reproduced.
The length of the interleaved unit IU is determined in consideration of the capacity of the track buffer, as described above, and also in consideration of the performance of the drive mechanism such as the slider motor for performing the track jump. May be done.

As described above, one cell 20 is divided into a plurality of interleaved units IU and recorded according to the intention of the manufacturer, so that the PGC 61 including the cells 20 with scattered ID numbers is reproduced. However, the signal output from the track buffer is not interrupted, so that the viewer can watch the reproduced video without interruption.

The above interleaved unit IU
Are formed so as to be completed within one VOB 10, and one interleaved unit IU has a plurality of VOBs adjacent to each other.
It does not straddle 10. Regarding the relationship between the interleaved unit IU and the VOB unit 30, one or a plurality of VOs are included in one interleaved unit IU.
The B unit 30 is included, and one VOB unit 30 is configured to be completed in one interleaved unit IU, and one VOB unit 30 is divided to span a plurality of interleaved units IU. There is no such thing. Next, of the above physical structure and logical structure,
Particularly, the structure relating to the surround control according to the present invention will be described in detail with reference to FIGS. 4 to 11. (I) First Surround Control Mode In the present embodiment, the position of the speaker that can be designated in the room is limited to a predetermined type.

Under this condition, the surround control information for specifying, for each channel, from which speaker the signal recorded in the channel is output is shown in FIG.
Lead-in area LI, video manager 2,
It is described in the control data 11 of each VTS 3 or the control information of each audio packet. In addition, when speakers at the same position are specified for multiple channels, the convention is that speakers with the smallest channel number correspond to speakers arranged on the outer side (away from the listener position) in order. For the surround control information. Then, in the recording device and the reproducing device, if the surround control information is recorded and reproduced according to this convention,
The size of the channel number can be effectively used as one piece of information indicating the speaker arrangement. That is, it is not only a problem if a plurality of channels specify the same speaker,
Also in this case, the position of the speaker is specified according to the creator's intention.

In the present embodiment, for example, it is assumed that there are 15 possible speaker layouts that can be designated. Therefore, 4-bit information is required for each channel as data for indicating any one of the 15 speaker positions.

The speaker at the position that can be designated in FIG. 4 is the left ground front speaker SP, which is arranged on the floor in front of the listener position P0 inside the room 200.
There are gfl, right ground front speaker SPgfr and center ground front speaker SPgfc, and left top front speaker SPtfl, right top front speaker SPtfr and center top front speaker SP that are placed above the head in front.
Left ground rear speaker SPgrl located on the floor behind tfc, right ground rear speaker SPgrr and center ground rear speaker SPgrc located on the rear floor, left top rear speaker SPtrl, right top rear speaker Left side speaker with SPtrr and center top rear speaker SPtrc, placed on the left and right walls respectively
There is an SPsl and a right side speaker SPsr, and an overhead center speaker SPtm arranged in the center of the ceiling.

As the surround control information, for example, the surround control information shown in FIG. 5 is constructed. In this example, it is assumed that the audio signal stream for the surround recording is composed of 8-channel audio signals.

In FIG. 5, surround control information 300
Consists of 64-bit information, and predetermined data is described for each channel for each byte as follows.

First, in the 1-byte data portion of bits b63 to b56, data "0" is written as an empty area in bit b63, and in bit b62.
ACH0 mode data 301a indicating that a ch0 audio signal is downmixed into a multi-channel audio signal is described. Bit b61 and bit b60 include
ACH0 mix mode data 302a indicating that the 1-byte data is in the combination mode of audio ch0
Is described, and the audio channel content data 30 indicating the arrangement of the speakers from which the audio signal of the audio ch0 should be output is set in 4 bits of the bits b59 to b56 that follow.
3a is described.

In the 1-byte data portion of bits b55 to b48, data "0" is written as an empty area in bit b55, and ch1 is written in bit b54.
ACH1 mode data 301b indicating that the audio signal of 1 is downmixed into a multi-channel audio signal is described, and the bit b53 and the bit b52 indicate that the 1-byte data is applied to the combination mode of audio ch1. The ACH1 mixed mode data 302b shown is described, and the audio channel content data 303b indicating the arrangement of the speakers from which the audio signal of the audio ch1 is to be output, in the following 4 bits of bits b51 to b48.
Is described.

In the 1-byte data portion of bits b47 to b40, combination parameter data 304c indicating combination characteristics of multi-channel audio signals is described in bits b47 and b46.
In 45 and b44, the 1-byte data is the audio channel.
ACH2 mix mode data 302c indicating that the combination mode of 2 is applied is described, and in the 4 bits of the subsequent bits b43 to b40, a voice channel indicating the arrangement of the speakers from which the voice signal of this voice ch2 should be output. Content data 303c is described.

1-byte data portion consisting of bits b39 to b32, 1-byte data portion consisting of bits b31 to b24, 1-byte data portion consisting of bits b23 to b16, 1-byte data portion consisting of bits b15 to b8 Similarly to the 1-byte data portion of bits b47 to b40 described above, the 1-byte data portion including the portion and bits b7 to b0 is the combination parameter data ACHn (n = 3 to n) for channels 3 to 7, respectively.
7) Describes mix data and audio channel content data. This audio channel content data 303
The relationship between the 4 bits recorded as and the position of the output speaker is as shown in FIG.

For example, the audio channel content data 303 (303a, 303b, 303c, shown in the table of FIG. 5)
6), the binary data 0000 to 1100 are described in ch0 to ch5 as shown in FIG. 6, and among the speaker arrangements shown in FIG. 4 which are associated in advance with these binary data 0000 to 1100. Of the binary data 0000 to 1100, respectively.

In the example shown in the table of FIG. 6, the audio signal stream for the surround recording is composed of audio signals of 6 channels (two channels are not used), and Is assigned to ch
There are 6 channels from 0 to ch5. In this case c
In the surround control information 300 regarding h6 and ch7, it is described in the voice attribute information (not shown) that ch6 and ch7 are not used, so ch6 and c
The audio channel content data for h7 is invalid.

Audio channel content data 3 shown in FIG.
FIG. 7 shows the relationship between the speaker arrangement indicated by 03 and each channel. In FIG. 7, inside the room 200,
Positioned on the floor in front of the listener position P0 5
As one speaker, a left ground front speaker SPgfl # 1 corresponding to ch0, a right ground front speaker SPgfr # 1 corresponding to ch1, a central ground front speaker SPgfc corresponding to ch2, a left ground front speaker SPgfl # 2 corresponding to ch3, And right ground front speaker SPgfr # 2 corresponding to ch4 and ch4, and
Ch5 as one loudspeaker placed overhead above
The center top rear speaker SPtrc corresponding to is arranged.

As can be seen especially from the table of FIG. 6, there is no distinction between the left and right ground front speakers # 1 and # 2 in the data of the audio channel content information, but a plurality of When the same speaker is designated by the channel, the surround control information is described in accordance with the rule that the one with the smaller channel number is arranged outside.
2 and 2 can be clearly distinguished by treating "the size of the channel number" as one piece of information.

Further, for example, the audio channel content data 303 (303a, 303b, 303c, shown in FIG. 5)
8), binary data 0000 to 1111 are described in ch0 to ch6, respectively, as shown in FIG. 8, and among the speaker arrangements shown in FIG. 4 that are associated in advance with these binary data 0000 to 1111. Any of these is indicated by the value of the binary data 0000-1111.

Audio channel content data 3 shown in FIG.
FIG. 9 shows the relationship between the speaker arrangement indicated by 03 and each channel. In FIG. 9, inside the room 200,
Placed on the floor in front of the listener position P0 7
As one speaker, left ground front speaker SPgfl # 1 corresponding to ch0, right ground front speaker SPgfr # 1 corresponding to ch1, left ground front speaker SPgfl # 2 corresponding to ch2, right ground front speaker SPgfr # corresponding to ch3 2, left ground front speaker SPgfl # 3 corresponding to ch4, right ground front speaker SPgfr # 3 corresponding to ch5, and c
The center ground front speaker SPgfc corresponding to h6 is arranged.

As can be seen especially from the table of FIG. 8, there is no distinction between the left and right ground front speakers # 1 and # 2 and # 3 in the data of the audio channel content information. According to the convention that the channel with the smallest channel number is placed outside, #
1 and # 2 and # 3 can be clearly distinguished on the data.

As described above, according to the first surround control mode, the position of the speaker that can be designated in the room is limited to a predetermined type (for example, 15 types shown in FIG. 4). With the information of 4 bits per channel (that is, the audio channel content data in the surround control information), that is, the information of 32 bits per one audio signal stream, the speaker of which the audio signal of each channel should be output is exhausted. You can specify the position. Moreover, when a plurality of channels specify the speaker at the same position, the rule that corresponding to the speakers arranged in order from the one with the smallest channel number is provided for this 4-bit information, Also in this case, the arrangement of the speakers can be specified with certainty.

In the present embodiment, in addition to the 15 types of positions shown in FIG. 4, the placement of speakers for the super woofer (super bass) (amplification position of the reproducing device or arbitrary placement without position designation) is 16 It may be the position of the item type. Furthermore, when a plurality of channels specify speakers at the same position, the channels with the highest channel number correspond to the speakers arranged outward (the side farther from the listener position) in order. You may set the convention that the size is reversed. Even if it is reversed in this way, the same effect can be obtained as long as both the recording device and the reproducing device record and reproduce data in accordance with this convention.

As described in detail above, this embodiment is advantageous when the number of channels is large and it is desired to freely specify the speaker arrangement. For example, 15 shown in FIG.
In the case of the type of speaker arrangement, a maximum of "15 (the number of arrangements) to the power of 8 (the number of channels)" can be specified as the combination arrangement of speakers. (Ii) Second Surround Control Mode In the present embodiment, a combination arrangement mode of speakers that is often used practically is set in advance as the audio coding mode. Surround mode information indicating the audio coding mode is described in the lead-in area LI, the video manager 2 or the control data 11 of each VTS shown in FIG.

For example, as shown in the table of FIG. 10, this surround mode information 400 is composed of 4 bits and indicates 16 audio coding modes (1 + 1 to 4/4) by binary values 0000 to 1111. Then, unlike the case of the conventional Dolby AC3 system described above, 16 kinds of modes in which the number of speakers arranged in the room and the place thereof are not limited can be indicated by 4-bit information. Therefore, when making a recording sound source, the desired mode can be selected from a combination of these 16 types of modes.

Mode 4 of the audio coding modes indicated by the surround mode information shown in the table of FIG.
FIG. 11 shows the arrangement of the speakers corresponding to / 4. Figure 1
1, the left ground front speaker SPgfl, right ground front speaker SPgfr, left top front speaker SPtfl, right top front speaker SPtfr, left ground rear speaker SPgrl, right ground rear speaker SPgr
r, a left top rear speaker SPtrl and a right top rear speaker SPtrr are arranged in the room 200.

The above-described speaker combination arrangement shown in FIG. 7 and the speaker combination arrangement shown in FIG. 9 are used as one of the speaker arrangement arrangements that are often used in practice, as audio coding modes 5/1 and 7 /.
Set as 0, and in surround mode information (for example,
1001 and 1010).

As described above, according to the present embodiment, the speaker combination arrangement that is often used in practice (for example, 1
By preparing 6 types in advance, a relatively small number of surround control information (eg, 0000 to 111) of a predetermined number of bits (eg, 4 bits in total for 8 channels).
By using 1), it is possible to create a three-dimensional acoustic space at the listener's position by using audio signals of multiple channels.

Especially, the audio coding mode (mode of arrangement of speakers combined) which can be designated by the surround mode information described above is arbitrary as long as the number of channels is 8 or less. Then, as long as the reproducing apparatus can determine the audio coding mode by reproducing the sound mode information, there is no problem in any mode. However,
It is useless to set the audio coding mode for a speaker combination arrangement that the viewer may not actually use.

As described above, in this embodiment, if there are 16 types of audio coding modes, all channels of one audio signal stream can be represented by 4-bit information, and, for example, in the case of 32 types. Also, it can be represented by 5-bit information, that is, by writing extremely little information to the DVD, multi-surround can be realized. Especially when the number of channels is small,
In this way, the combination arrangement of the speakers that is often used in practice is set and designated by the surround mode information, which is advantageous because the amount of information to be written on the DVD can be small.

Further, when the surround control information and the surround mode information are included in the control data of each VTS, the audio coding mode can be changed for each VTS, which is convenient. However, when the surround control information and the surround mode information are put in the lead-in area or the video manager, there is no need to refer to the audio coding mode for each VTS, and there is an advantage that the process becomes simple.

The above-described surround control information and surround mode information are not alternative information, but both information can be recorded and both information can be reproduced so that both the recording device and the reproducing device are configured. If this is done, the DVD manufacturer will be able to perform surround control using either information as appropriate, thus increasing flexibility. Furthermore,
Viewers can easily enjoy multi-audio and multi-surround.

Note that, for example, in addition to recording one movie, the DVD can record voice and subtitles corresponding to the movie in a plurality of languages in the same optical disc. Since it has a large storage capacity, it is effective to apply the above recording format to the DVD 1 in particular. (II) Embodiment of Recording Device Next, the above-mentioned control information, video information and audio information are recorded on a DVD.
An embodiment of a recording apparatus for recording on No. 1 will be described with reference to FIG.

First, the configuration and operation of the recording apparatus according to the embodiment will be described with reference to FIG. As shown in FIG. 12, the recording apparatus S1 according to the embodiment has a VTR (Vi
deo TapeRecorder) 70, memory 71, signal processor 72, hard disk (HD) device 73, hard disk (HD) device 74, controller 75, multiplexer 76, modulator 77, and mastering device 78. It is composed by.

Next, the operation will be described. The VTR 70 has
Recording information R which is a material such as music information and video information to be recorded on the DVD 1 is temporarily recorded. And VT
The recording information R temporarily recorded in R70 is output to the signal processing unit 72 in response to a request from the signal processing unit 72.

The signal processing unit 72 A / D-converts the recording information R output from the VTR 1 and then compresses it according to the MPEG2 method, time-multiplexes music information and video information, and outputs them as a compressed multiplexed signal Sr. To do. After that, the output compressed multiplexed signal Sr is temporarily stored in the hard disk device 73.

In parallel with this, the memory 71 divides the recording information R into the partial recording information Pr in advance, and the surround control information 300 and the surround mode information 400 shown in FIG. The content information relating to the partial recording information Pr inputted in advance based on the cue sheet ST in which the user-defined information and the like are written is temporarily stored and is output as the content information signal Si based on the request from the signal processing unit 72. .

Then, the signal processing section 72 outputs the time code T corresponding to the recording information R output from the VTR 70.
Based on t and the content information signal Si output from the memory 71, referring to the time code Tt, the partial recording information P
The DSI information signal Sdsi and PCI information signal Spci corresponding to r are generated and output, and the DSI information signal Sdsi and PCI information signal Spci are temporarily stored in the hard disk device 74.

The above processing is executed for the entire record information R. When the above processing is completed for all the recorded information R, the controller 75 reads the compression multiplexed signal Sr from the hard disk device 73 and the DSI information signal Sdsi and PCI information signal Spci from the hard disk device 74, and based on these, the additional information. DA is generated and stored in the hard disk device 74. This is because some control signals have their contents determined by the result of generation of the compression multiplexed signal Sr. On the other hand, the controller 75 includes the signal processing unit 72 and the hard disk device 7
3 and the hard disk device 74 perform time management of their respective operations, and add the additional information signal Sa corresponding to the additional information DA.
Is read from the hard disk device 74 and output, and an information selection signal Scc for time-multiplexing the compression multiplexed signal Sr and the additional information signal Sa is generated and output.

Thereafter, the compression multiplexed signal Sr and the additional information signal Sa are time-axis multiplexed by the multiplexer 76 based on the information selection signal Scc and output as the information additional compression multiplexed signal Sap. If the sub-picture information exists, it is input to the signal processing unit 72 by another means such as a hard disk device (not shown) and processed in the same manner as the image and audio information.

Then, the modulator 77 adds an error correction code (ECC) such as Reed-Solomon code or the like to the output information-added compression multiplexed signal Sap and performs modulation such as 8-16 modulation to make the disc recording signal Sm. Is generated and output to the mastering device 78.

Finally, the mastering device 78 records the disc recording signal Sm on a stamper disc which is a master (cutting die) when manufacturing an optical disc.
Then, using this stamper disk, an optical disk, that is, a DVD, which is a commercially available replica disk, is manufactured by a replication device (not shown).

As described above, in the present embodiment, the signal processing section 72, the hard disk device 73, the hard disk device 74, the controller 75, the multiplexer 76, the modulator 77 and the mastering device 78 constitute an example of a writing means. Thus, the input unit of the cue sheet ST and the memory 71 constitute an example of an input unit.

Next, the detailed operation of the recording apparatus S1 for recording the surround control information and the surround mode information on the master disk will be described. When the control information signal Si indicating the surround control information and the surround mode information input from the cue sheet ST is input, the information processing section 72 receives the lead-in area LI or the lead-in area LI located on the inner peripheral side of the disc shown in FIG. As an information signal Scs for entering into the video manager 2 or as an information signal Ssc for entering into the control data 11 located at the head of each VTS 3.
To the hard disk device 74. The hard disk device 74 temporarily stores these control information Ssc together with other DSI information signal Sdsi and PCI information signal Spci.

Here, the controller 75 causes the DVD
When the information selection signal Scc indicating that the surround control information 300 or the surround mode information 400 to be placed in the lead-in area or the video manager area located on the inner peripheral side of the is output, the multiplexer 76 causes the additional information signal Sa
Switched to the side. And surround control information 30
The 0 or surround mode information 400 is input to the modulator 77 as a part of the additional information signal Sa multiplexed at this time, and further to the mastering device 78 as a part of the disc recording signal Sm. As a result, the surround control information 300 shown in FIG. 5 or the surround mode information 400 shown in FIG. 10 is constructed in the area of the lead-in area or the video manager.

Alternatively, each V can be controlled by the controller 75.
When the information selection signal Scc indicating that the surround control information 300 or the surround mode information 400 to be placed at a predetermined position in the control data of the TS should be selected, the surround control information 300 or the surround mode information 400 is output.
Is inputted to the modulator 77 as a part of the additional information signal Sa multiplexed at this time, and further inputted to the mastering device 78 as a part of the disc recording signal Sm. This operation is performed for each of the plurality of VTSs, and the surround control information 300 shown in FIG. 5 or the surround mode information 400 shown in FIG. 10 is constructed in the control data of each VTS.

When the surround control information 300 is recorded at the same time as the record information R, the signal processing section 72 sets V
When the recording information R output from the TR 70 is A / D-converted and then subjected to processing such as compression, the audio information and the video information are time-axis multiplexed and output as a compressed multiplexed signal Sr.
Based on the content information signal Si output from the No. 1, surround control information 300 is multiplexed on a portion of the audio pack (packet) 43 where control information is recorded.

As described in detail above, according to the recording apparatus S1 of this embodiment, the master disk of DVD1 described in the above-mentioned "(I) Embodiment of information recording medium" can be produced. (III) Embodiment of reproducing apparatus Next, an embodiment of a reproducing apparatus for reproducing the information recorded on the DVD 1 by the recording apparatus S1 will be described with reference to FIG.
Will be explained.

First, the configuration and operation of the reproducing apparatus according to the embodiment will be described with reference to FIG. As shown in FIG. 13, the reproducing apparatus S2 according to the embodiment includes a pickup 80, a demodulation correction unit 81, and a stream switch 82.
And 84, a track buffer 83, a system buffer 85, a demultiplexer 86, and a VBV (Video Bu).
ffer Verifier) buffer 87 and video decoder 88
A sub picture buffer 89, a sub picture decoder 90, a mixer 91, and an audio buffer 92.
, Audio decoder 93, and PCI buffer 94
, PCI decoder 95, and highlight buffer 96
A highlight decoder 97, an input unit 98, a display 99, a system controller 100, a drive controller 101, a spindle motor 102,
It is composed of a slider motor 103. In addition,
The structure shown in FIG. 13 shows only the part relating to the reproduction of video and audio in the structure of the reproducing apparatus S2, and a servo circuit for servo-controlling the pickup 80, the spindle motor 102, the slider motor 103 and the like. Since this is the same as the prior art, the description and detailed description thereof will be omitted.

Next, the overall operation will be described. The pickup 80 includes a laser diode, a deflection beam splitter, an objective lens, a photodetector, and the like (not shown), irradiates the DVD 1 with a light beam B as reproduction light, and reflects the light beam B reflected from the DVD 1. Receives light, DVD1
Detection signal Sp corresponding to the information pit formed above
Is output. At this time, the light beam B is accurately applied to the information track on the DVD 1, and a method similar to that of the conventional technique is applied to an objective lens (not shown) so that the information recording surface on the DVD 1 is accurately focused. The tracking servo control and the focus servo control are performed by.

The detection signal Sp output from the pickup 80 is input to the demodulation correction unit 81, demodulation processing and error correction processing are performed to generate a demodulation signal Sdm, which is output to the stream switch 82 and the system buffer 85. ..

The stream switch 82 to which the demodulated signal Sdm is input is controlled to be opened and closed by the switch signal Ssw1 from the drive controller 101, and when closed, the input demodulated signal Sdm is directly passed through and output to the track buffer 83. To do. On the other hand, when the stream switch 82 is open, the demodulated signal Sdm is not output, and unnecessary information (signal) is not input to the track buffer 83.

The track buffer 83 to which the demodulated signal Sdm is input is composed of a FIFO (First In First Out) memory or the like, and temporarily stores the input demodulated signal Sdm, and the stream switch 84 is closed. If so, the stored demodulated signal Sdm is continuously output.
The track buffer 83 is used for each G in the MPEG2 system.
In addition to compensating for the difference in the data amount for each OP, the demodulated signal Sdm input discontinuously due to the track jump in the seamless reproduction is continuously read when reading the data divided into the interleaved units IU. It is intended to eliminate the interruption of the reproduction due to the discontinuity.

The stream switch 84 to which the demodulated signal Sdm is continuously input is prevented from overflowing the various buffers in the subsequent stage or conversely becoming empty and interrupting the decoding process in the demultiplexing process in the demultiplexer 86. In addition, opening / closing is controlled by the switch signal Ssw2 from the system controller 100.

On the other hand, the system buffer 85 to which the demodulated signal Sdm is input in parallel with the track buffer 83 is DV
First detected when loading D1, DVD
The management information (video manager 2 etc.) related to the entire information recorded in 1 and the control data 11 of the VTS 3 are accumulated and output to the system controller 100 as the control information SC, and the above-mentioned navigation is performed as necessary during information reproduction. The DSI packet 51 for each pack 41 is temporarily stored and output to the system controller 100 as control information SC.

In the demultiplexer 86 to which the demodulated signal Sdm is continuously input via the stream switch 84, the video information, the audio information, the sub-picture information and the PCI packet 50 for each navigation pack 41 are separated from the demodulated signal Sdm. Then, the video signal Sv, the sub-picture signal Ssp, the audio signal Sad, and the PCI signal Spc are output to the VBV buffer 87, the sub-picture buffer 89, the audio buffer 92, and the PCI buffer 94, respectively. Note that the demodulated signal Sdm may include a plurality of languages as separate streams as audio information or sub-picture information. In that case, the stream selection signal Slc from the system controller 100 causes a desired language. Are selected and output to the audio buffer 92 or the sub-picture buffer 89.

The VBV buffer 87 to which the video signal Sv is input is formed of a FIFO memory or the like, temporarily stores the video signal Sv, and outputs it to the video decoder 88. The VBV buffer 87 is for compensating the variation in the data amount for each picture in the video signal Sv compressed by the MPEG2 system. And
The video signal Sv in which the variation in the data amount is compensated is input to the video decoder 88, demodulated by the MPEG2 system, and output to the mixer 91 as a demodulated video signal Svd.

On the other hand, the sub-picture buffer 89 to which the sub-picture signal Ssp is input temporarily accumulates the input sub-picture signal Ssp and outputs it to the sub-picture decoder 90.
The sub-picture buffer 89 is for outputting the sub-picture information included in the sub-picture signal Ssp in synchronization with the picture information corresponding to the sub-picture information. Then, the sub-picture signal Ssp synchronized with the picture information is input to the sub-picture decoder 90, demodulated and demodulated sub-picture signal S
It is output to the mixer 91 as spd.

If the sub-picture signal Ssp contains picture information for composing a frame, a selection button, etc. necessary for composing and displaying the menu screen, a high level signal from the system controller 100 is displayed. Based on the write control signal Sch, the display state of the selection button or the like to be displayed is changed and output.

The demodulated video signal Svd output from the video decoder 88 and the demodulated sub-picture signal Sspd (synchronized with the corresponding demodulated video signal Svd) output from the sub-picture decoder 90 are mixed by the mixer 91. The final video signal Svp to be displayed is output to a display unit such as a CRT (Cathode Ray Tube) not shown.

Next, the audio buffer 92 to which the audio signal Sad is input is constituted by a FIFO memory or the like, temporarily stores the input audio signal Sad, and outputs it to the audio decoder 93. The audio buffer 92 is for outputting the audio signal Sad in synchronization with the video signal Sv or the sub-video signal Ssp including the corresponding video information, and delays the audio signal Sad according to the output status of the corresponding video information. Let And
The audio signal Sad time-adjusted so as to be synchronized with the corresponding video information is output to the audio decoder 93, subjected to predetermined decoding, and demodulated audio signal Sad.
It is output to a speaker or the like not shown as d. When it is detected that the sound needs to be temporarily interrupted (paused) in the reproduction immediately after the access, the system controller 100 outputs the pause signal Sca to the audio decoder 93, and the audio decoder 93 concerned. The output of the demodulated audio signal Sadd is temporarily stopped. Further, the PCI buffer 94 to which the PCI signal Spc is input is configured by a FIFO memory or the like, and temporarily stores the input PCI signal Spc, and the PCI decoder 95
Output to. The PCI buffer 94 includes the PCI packet 50 included in the PCI signal Spc and the PCI packet 50.
Synchronizes the corresponding video information, audio information, sub-video information, etc., and PC
This is for applying the I packet 50. Then, the PCI signal Spc synchronized with the corresponding video information, audio information, sub-video information, or the like by the PCI buffer 94 is P
The highlight information included in the PCI packet 50 is separated by the CI decoder 95 and is output to the highlight buffer 96 as a highlight signal Shi, and a portion other than the highlight information of the PCI packet 50 is used as a PCI information signal Spci as a system controller. Is output to 100.

The highlight buffer 96 to which the highlight signal Shi is input is composed of a FIFO memory or the like,
The input highlight signal Shi is temporarily stored and output to the highlight decoder 97. Highlight buffer 9
Reference numeral 6 is a time axis compensation for accurately displaying the change in the display state of the selection item corresponding to the highlight information, corresponding to the sub video signal Ssp including the video information for the highlight information. Is a buffer for performing. Then, the highlight signal Shi subjected to the time axis compensation is decoded by the highlight decoder 97, and the information included in the highlight signal Shi is output to the system controller 100 as a demodulated highlight signal Shid. here,
Based on the demodulated highlight signal Shid, the system controller 100 outputs the highlight control signal Sch in order to change the display state according to the highlight information.

Based on the control information Sc input from the system buffer 85, the PCI information signal Spci input from the PCI decoder 95, and the input signal Sin input from the input section 98 such as a remote controller, the system controller 100 outputs those signals. The switch signal Ssw2, the language selection signal Slc, the pause signal Sca, and the highlight control signal Sch are output in order to perform the correct reproduction corresponding to the display signal Sdp for displaying the operation status of the reproducing apparatus S2.
Is output to a display 99 such as a liquid crystal display device.

Furthermore, when the system controller 100 detects from the control signal Sc or the above-mentioned DSI data that it is necessary to perform a track jump process such as a search for seamless reproduction, it informs the drive controller 101. , And outputs a seamless control signal Scsl corresponding to the track jump processing. Then, the drive controller 101 to which the seamless control signal Scsl is input outputs the drive signal Sd to the spindle motor 102 or the slider motor 103. With this drive signal Sd, the spindle motor 102 or the slider motor 103 causes the light beam B to be reproduced on the DVD.
The pickup 2 is moved so as to irradiate the recording position on 1 (see the broken line arrow in FIG. 13), and the rotation speed of the DVD 1 is controlled by CLV (constant linear velocity). In parallel with this, when the pickup 2 is moving and the demodulation correction unit 81 does not output the demodulation signal Sdm, the drive controller 101 outputs the switch signal Ssw1 based on the seamless control signal Scsl and opens the stream switch 82. At the same time, when the demodulated signal Sdm starts to be output, the stream switch 82 is closed to output the demodulated signal Sdm to the track buffer 83.

As described above, in the present embodiment, the pickup 80 constitutes an example of the reading means, and the track buffer 83, the demultiplexer 86, the audio buffer 92, and the audio decoder 93 constitute an example of the audio demodulating means. Has been done.

Next, the structure and operation of the surround control of this embodiment will be described in detail. here,
A description will be given below of the forms of two reproducing devices in the case where the surround control information 300 shown in FIG. 5 is reproduced as a part of the control information of the lead-in area, the video manager, the control data of each VTS or each audio packet. (I) Mode of First Reproducing Device In the present embodiment, in particular, by referring to the surround control information 300 which is reproduced before the reproduction of the audio signal, the speaker positions to which a plurality of audio signals are to be respectively output. , Identified by the controller 100. Under the control of the controller 100, information on which speaker in the room each channel should be output, which is identified in this way, is displayed on the display 99 or the image provided on the front panel of the playback device. The information is displayed on the screen of the television connected to the reproducing apparatus S2 to reproduce and output the information. This display method uses a screen 99 of a display 99 composed of a liquid crystal display device as shown in FIG.
The text may be displayed on the screen a, or the screen 11 of the television connected to the reproducing apparatus S2 as shown in FIG.
It may be a graphic display on 0.

Therefore, the viewer can move his or her speaker to the displayed position by seeing this display.
That is, the viewer prepares the required number of speakers according to the displayed speaker arrangement and arranges them at the designated positions, respectively, and outputs the audio signal of each channel to the designated speaker. By wiring as described above, the surround sound field intended by the title creator can be reproduced extremely accurately. Therefore, the reproducing apparatus S2 is advantageous as a reproducing apparatus for business use or sound mania. (Ii) Second Playback Device Mode In the above-described first playback device mode, the speakers are rearranged each time the speaker layout is displayed on the display or TV screen, that is, each time the DVD to be played is changed. , It has to be re-wired, which is inconvenient for ordinary home use. On the contrary, it would be convenient if an appropriate surround sound field can be reproduced from a plurality of DVDs having different speaker arrangements indicated by the above-mentioned surround control information without changing the speaker setting performed once.

Therefore, in the second embodiment, the reproducing apparatus S2 is
First, of the 15 types of speaker arrangements shown in FIG. 4 and one type of speaker arrangement for super woofers (16 kinds of arrangements in total), the controller 100 determines which speaker is actually arranged in the room. It is configured so that it can be designated. This designation is performed via the input device 98.

More specifically, for example, this designation means "is there a left grand front speaker? Yes / No?" (In this) on the display screen of the television or display connected to the reproducing apparatus S2 by the characters. On the contrary, Y
Respond to es by operating the cursor or entering a key), "Is there a right ground front speaker? Yes / No
? (In response to this, in response to Yes by a cursor operation or a key input), ... In the question and answer format, the presence or absence of each speaker may be designated first. Further, for example, when a graphic display as shown in FIG. 4 is made on the display and a speaker is actually present at each speaker position by a mouse operation or the like, “○” (and / or “×” when not present) is displayed. The presence or absence of each speaker may be input and designated by attaching.

Further, for example, on the display screen of the television or the display, the character "What is the distance to the speaker in the x direction? Answer)), "What is the distance to the speaker in the y direction? The position with respect to the position may be designated. Further, for example, by inputting the (x, y, z) coordinates of each speaker with the listener position as the origin, the position of each speaker with respect to the listener position may be input and designated. Furthermore, for example, on the menu screen, the room type can be 4.5 tatami mats, 6 tatami mats, 8 tatami mats, 10 tatami mats, 12 tatami mats, ..., or a variety of rooms such as rectangular rooms, square rooms, large rooms, and small rooms. By selecting one of the types, the position of each speaker with respect to the listener position may be indirectly specified. That is, in this case, assuming that the listener position is the center of the room and the speakers are arranged at the corners of the room, the controller 100 calculates the distance to each speaker and calculates (x, y, z) of each speaker. ) Coordinates are calculated automatically. Furthermore, a layout pattern that is often used in practice (for example, 4 speakers at 4 corners of a 6-tatami mat or 8 tatami-mat)
It is also possible to prepare dozens of different types of patterns), display each arrangement pattern in sequence, and select the corresponding arrangement pattern from among them.

Also, the existing speaker arrangement information indicating the specified arrangement is in a predetermined format and is stored in the controller 10
The present speaker arrangement information is stored in a non-volatile storage device built in 0, and once this designation is made, even if the power of the reproducing device S2 is turned off, the existing speaker arrangement information is not lost. Then, this real speaker arrangement information can be updated at any time according to the viewer's desire.

In the second embodiment, the reproducing apparatus S2 further reproduces the audio signals of the respective channels by reproducing the audio signals of the respective channels on the basis of the existing speaker arrangement information and the surround control information 300. Also, in order to reproduce the surround sound field intended by the title creator, it is configured to convert into an audio signal corresponding to the actual speaker arrangement. That is, the playback device S
2 is the actual speaker placement specified by the viewer and D
The audio signal of each channel is configured to be mixed down to an output signal corresponding to the actual speaker arrangement according to the difference from the speaker arrangement indicated by the surround control information 300 reproduced from the VD.

Next, regarding the configuration and operation for converting the audio signal corresponding to the speaker position designated by the reproduced surround control information 300 into the audio signal corresponding to the actual speaker arrangement, FIGS. It will be described with reference to FIG.

Here, consider a case where the speaker arrangement designated by the surround control information shown on the left side of FIG. 16 is converted to the actual speaker arrangement shown by the pre-input designated real speaker arrangement information shown on the right side.

In this case, as shown in FIG. 17, the demodulated audio signal Sadd output from the audio decoder 93 of FIG. 13 is output to the output terminals of ch0 to ch5, but the reproducing device S2 outputs these signals. For example, eight downmix circuits 120a, 120b, 120 to be input
c, 120d, ... Downmix circuit 1
20a downmixes the audio signals of ch0 to ch7 and outputs them as a ch0 signal for an existing left ground front speaker. The downmix circuit 120b is c
The audio signals of h0 to ch7 are downmixed and output as a ch1 signal for a real right ground front speaker. The downmix circuit 120c is ch0 to ch7.
The audio signal of 3 is downmixed and output as a signal of ch3 for a real left top rear speaker. The downmix circuit 120d downmixes the audio signals of ch0 to ch7 and outputs them as ch4 signals for the existing right top rear speaker. In this example, since there are only four real speakers, they are not used here and are not shown in the figure, but in reality, eight downmix circuits are reproduced so as to cover the output of eight channels. Device S2
Is equipped with.

In FIG. 17, the downmix circuit 12
An amplifier provided for each input channel inside 0 has a coefficient Cn (n = n) of a value determined according to the conversion method as described later.
It is a variable gain amplifier having a function of multiplying each of 0 to 7) and changing its gain. Furthermore, each amplifier is a DSP
Signal processing by (Digital Signal Processor) or the like may be performed. In addition, as the contents of the signal processing in this case,
There are phase control, delay time (Td) control, reverberation sound addition processing, etc.

As described above, in this embodiment, the downmix circuit 120 constitutes an example of the output means.
The display 99 constitutes an example of a display unit, and the input unit 98 constitutes an example of a designation unit.

Next, a concrete example of the signal conversion method by the downmix circuit will be described with reference to FIGS. First, a method of converting the position of the speaker designated by the surround control information to the position of the actual speaker will be described.

In this case, first, the virtual position of each speaker estimated by the surround control information is determined as follows. Here, the “virtual position” refers to the position of the speaker that is virtually virtualized during the algorithm for finally determining the distribution of the audio signals.

That is, a virtual position of another speaker is assumed from the position of the existing speaker indicated by the speaker specifying information input and specified by the viewer. As a general rule, the left and right ground front speakers SPgfl and SPgfr are basic speakers, so at least the positions of these two speakers must be input (designated) by the viewer. Therefore, even if the position of each speaker is not specified,
Only the positions of these two speakers SPgfl and SPgfl are
Since the input should have been designated, the virtual positions of the other speakers are considered as shown in FIG. That is, each speaker is virtually arranged at 15 types of positions that are symmetrical in the front-rear direction and the left-right direction with respect to the listener position P0 in the room 200.

At this time, if there is no instruction in the Z direction, it is considered that all the speakers are on the same plane, and the top speaker and the ground speaker are not distinguished. Here, it is assumed to be the ground.

Secondly, the conversion from the virtual position of each speaker obtained as described above to the position of the actual speaker (that is, the distribution of the audio signal to each speaker) is performed as follows.

That is, first, for each channel, the distance from the speaker position designated by the surround control information to a plurality of existing speakers is obtained, and the positions of the closest existing speakers are obtained as described above. The output speaker is changed based on the virtual position of the speaker. That is,
The audio signal to be output from the speaker at each virtual position is distributed to a plurality of existing speakers. However,
At this time, it is treated as left-right symmetry, and further, as shown in FIG. 19, the speaker specified in the surround control information located in the corner of the room 200 is treated as Y0 = Z0.
That is, as shown in FIG. 20, regardless of the distance between Y0 and Z0, when two speakers having such a positional relationship actually exist, the audio signals are distributed so as to be output from the two speakers. In addition, as shown in FIG.
The side wall of the room is treated as L1 = L2, and regardless of the size of the distance between L1 and L2, there is such a positional relationship 2
If there are two speakers (SPgfl, SPgfr),
The audio signal is distributed so as to be output from these two speakers.

Then, the speakers in the room are grouped by plane as shown in FIG. Here, the front surface 20
It is assumed that the speaker in the virtual position above 1 has to be changed to the speaker existing on the front surface 201. That is, the audio signal to be output from the speaker at the virtual position on the front surface 201 is distributed to the existing speakers on the front surface 201. Conversion from the front surface 201 to another surface is not allowed. That is, the front surface 201 has the first priority.

Next, the speaker at the virtual position on the rear surface 202 has a rear surface 2 regardless of the distance relationship, if there is a speaker that actually exists on the rear surface 202.
Shall be converted to 02 loudspeakers.
That is, the rear surface 202 has the second priority.

Next, the top surface 203 and the ground surface 20.
4, the left side surface 205 and the right side surface 206 are treated similarly. However, when the speaker in the virtual position exists on two surfaces (in the case of the center position), the rear surface 202 is prioritized. The conversion from the rear surface 202 to another surface is postponed.

Next, as described above, since it is assumed that the two basic speakers SPgfl and SPgfr always exist, if there is no speaker that actually exists in the group on each surface, the front surface 201, and Finally, the two speakers SPgfl and SPgfr are used for output.

FIG. 23 to FIG. 26 show the conversion from the virtual position of each speaker to the position of the actual speaker (that is, the distribution of the audio signal to each speaker), which is performed according to the above rules.

As shown in FIGS. 23 to 26, the speaker position estimated by the surround control information is converted into the position of the actual speaker. In the drawings, circled numbers, ... Show the priority order of conversion in the processing of each NO. When the conversion is performed in order from, and there is a speaker that exists at the conversion destination,
No further conversion is performed. Thus, according to the above rule, virtual speakers SPtfc, SPtfl, (SPgfl,)
SPgfc, SPtm, SPsl, SPtrc, SPtrl, SPgrl, SPgrc
Is converted to an existing speaker position. As a general rule, the speaker SPgfl must actually exist.

Thirdly, the distribution level of the audio signal to the position of the actual speaker obtained as shown in FIGS. 23 to 26 is determined as follows. That is, when searching for the closest existing speaker position and converting it to the closest existing speaker position, if there are n closest existing speaker positions at the same distance, to each existing speaker, The level is determined so that the audio signal output is divided into n equal parts (multiplied by 1 / n). Since there are usually no more than two, the distribution level of distribution is 0.5 + 0.5. As shown in FIG. 27, in the case of the side surface, weighting is performed according to the distance.
If there is only one speaker, the level is determined so that all audio signals are output from that speaker. In addition, FIG.
As shown in, each corner of the room is also weighted according to the distance. If there is only one speaker, the level is determined so that all audio signals are output from that speaker. That is, when searching for a speaker to be converted, L1 = L2, Z0 =
Set to Y0, and when determining the level, weight according to the actual distance.

Next, how to determine the coefficient Cn (n = 0 to 7) of each amplifier in the downmix circuit shown in FIG. 17 will be described with reference to FIGS. 29 to 33. For example, in the example shown in FIG. 29, there are existing speakers SPgfl and SPgfr, but the coefficients C1 and C2 in this case are determined as follows.

First, in order to simplify the calculation, the following is considered. That is, as shown in FIG. 30, two left and right speakers L,
Assume that R is at a position of ± 30 ° from the listening position to the front. Further, at this time, the position where the virtual speaker is to be arranged is a position to the right by θ.

The sound pressure difference between both ears at this time (sound pressure of right ear-sound pressure of left ear) ΔP shown in FIG. 31 is expressed by the following equation. ΔP = P {1 / (γ-d / 2) -1 / (γ + d / 2)} P ... The sound wave from the sound pressure source at point 0 is a plane wave when it reaches both ears, and the sound The pressure P is considered to be inversely proportional to the distance from the sound source.

Then, the sound pressure difference ΔPR between both ears by the right speaker is expressed by the following equation. ΔPR = PR {1 / (γ-d / 2) -1 / (γ + d /
2)} Further, the sound pressure difference ΔPL between the two ears by the left speaker is expressed by the following equation.

ΔPL = PL {1 / (γ + d / 2) -1 / (γ-d / 2)} = -PL {1 / (γ-d / 2) -1 / (γ + d / 2)} Therefore, both The sound pressure difference ΔPR + L due to the speaker is expressed by the following equation (1).

ΔPR + L = (PR−PL) {1 / (γ−d / 2) −1 / (γ + d / 2)} (1) (However, addition by a vector is required to calculate this difference. Here, an expression is shown as a scalar amount for simplification of description. Further, the sound pressure difference ΔPR ′ due to the virtual speaker R ′ is represented by the following expression (2).

ΔPR ′ = PR ′ {1 / (γ′−d ′ / 2) −1 / (γ ′ + d ′ / 2)} (2) Here, it is desired to make R ′ have a speaker. Therefore, the sound pressure difference (1) between both ears by both speakers may be matched with (2).

That is, the following equation holds. (PR-PL) {1 / (γ-d / 2) -1 / (γ + d /
2)} = PR '{1 / (γ'-d' / 2) -1 / (γ '
+ D '/ 2)} ∴ (PR-PL) / PR' = {d '/ (γ'2-d2
/ 4)} / {d / (γ2-d2 / 4)} Here, since γ and γ'can be considered to be almost equal, γ
= Γ and assuming that the synthesis of the sound pressures from the left and right speakers matches the sound pressure from the virtual speakers, PR + PL = PR '(PR -PL) / PR' = (PR -PL) / (PR + PL) = PR / (PR + PL) -PL / (PR + PL) = C1-C2 ... Coefficient difference ∴C1-C2 = {d '/ (γ2-d'2 / 4)} / {d / (γ2-d2 / 4) )} Here, γ2 >> d2 / 4>d'2/4, and therefore γ2 -d'2 / 4 = γ2 γ2 -d2 / 4 = γ2, C1 -C2 = (d '/ γ2) / (d / Γ2) = d '/ d.

Here, since d = Lsin 30 °, d '= Lsinθ C1-C2 = Lsinθ / Lsin30 ° = sinθ / sin30 ° Becomes

Since C1 + C2 = 1, C1 = 1/2 (1 + sin θ / sin 30 °) C2 = 1/2 (1-sinθ / sin30 °) Becomes

This state is shown in the graph of FIG. Figure 32
From the position where the virtual speaker is to be placed to each of the speakers R and L as shown in FIG.
, L2, the respective coefficients C1 and C2 have almost the same values as when C1 = L2 / (L1 + L2) C2 = L1 / (L1 + L2).

Therefore, the coefficient Cn (n = 0 to 7) can be obtained by the calculation by the angle and the calculation by the distance. Further, when other processing such as delay is performed, the difference between C1 and C2 is reduced. In practice, the value Cn obtained by this calculation is quantized and used, so that it does not necessarily have to be exactly this value.

Next, how to determine the delay time Td of each amplifier in the downmix circuit shown in FIG. 17 will be described with reference to FIG.
It will be described with reference to FIGS. For example, in the example shown in FIG. 34, there are L (left) speakers and R (right) speakers.

In this case, as shown in FIG. 35, the sound heard by the right ear is (γ-
The sound emitted from the R speaker arrives after d / 2) / C seconds,
The sound emitted from the L speaker arrives after (γ + d / 2) / C seconds. Similarly, for the sound heard with the left ear, the sound of the L speaker arrives after (γ−d / 2) / C seconds, and R after (γ + d / 2) / C seconds.
The sound of the speaker arrives.

Therefore, the first arriving sound is the same (γ-d / 2) / C seconds later in both ears. Here, if the sound source is at R ', the time to reach the right ear is (γ'-d / 2)
/ C, and the time to reach the left ear is (γ '+ d / 2) /
It becomes C.

Therefore, the time difference Δt of the sound that first reaches each ear is Δt = d ′ / C. Here, paying attention to the time of the sound that first arrives at each ear when sound is emitted from the L speaker and the R speaker, in order to give the same time difference as when the sound source is at R ′, the time when the right speaker reaches the right ear is reached. The difference between (γ-d / 2) / C and the time (γ-d / 2) / C at which the left speaker arrives at the L speaker should be Δt, so the sound of the left speaker is simply Δt = d ′ / C. Just delay it.

However, since d '= Lsinθ and L is usually 15 to 18 cm, L = 18 cm
Then, Δt = Lsin θ / C.

Here, assuming that the sound velocity C = 340 m / sec, Δt = 530 μsec · sin θ.

Therefore, the time difference given to both speakers is Td = Δt = 530 μsec · sin θ And it is sufficient.

Actually, this time difference also depends on the sound pressure to be presented, and this value fluctuates depending on how the sound pressure difference between the left and right speakers is given. When increasing the sound pressure difference, this time difference Td may be small or may be 0 in some cases. On the other hand, when reducing the sound pressure difference, the time difference Td is increased according to the degree.

As described above in detail, according to the present embodiment, the downmix circuit uses the surround control information which is reproduced from the DVD and which is specified by the producer and the existing speaker which is specified by the speaker arrangement in which the viewer actually exists. By multiplying the coefficient Cn determined based on the arrangement information and changing the gain, the audio signal of each channel can be corresponded to the actual speaker arrangement according to the difference between the actual speaker arrangement and the speaker arrangement indicated by the surround control information. You can mix down to the audio signal. If only one surround control information 300 is written in one DVD, the determination of the coefficient Cn may be performed once when the reproduction of the DVD is started. On the other hand, if one is written in each VTS, it is performed every time the reproduction of the VTS is started. By doing so, even if the speaker arrangement is specified by the creator for each VTS, the surround sound field can be accurately reproduced for any VTS. Also, if this surround control information is written in the control information of each audio packet, this surround control will be performed one by one when the audio stream selected for output is output as digital data to an external device (receiver, etc.). There is no need to add information. Furthermore, the downmix circuit is a DS
Delay time T between speakers by performing signal processing by P etc.
It is also possible to control d and the like.

The function of performing mixdown (downmix circuit shown in FIG. 17 and wiring therefor) may be provided in the reproducing apparatus S2 itself, but is connected to each speaker having a function of communicating with the reproducing apparatus S2. A receiver or the like may be provided. In addition, in order to perform signal conversion so as to reproduce this surround sound field more accurately, not only information on the actual speaker arrangement indicating the actual arrangement of each speaker but also information on the sensitivity and output wattage of each speaker should be provided. It may be specified in the reproducing apparatus S2 together with the real speaker arrangement information, and the level may be determined based on the sensitivity and wattage of the speaker. In this case,
For example, when the sensitivities of the left and right speakers and the front and rear speakers are different from each other, the audio signal may be converted more accurately by increasing the level of the audio signal given to the speaker having a relatively low sensitivity.

In the above-described embodiment, the signal conversion processing is performed based on the difference between the speaker arrangement indicated by the surround control information 300 shown in FIG. 5 and the speaker arrangement indicated by the real speaker arrangement information. The signal conversion processing can be performed based on the difference between the speaker arrangement indicated by the surround mode information 400 shown in FIG. 4 and the speaker arrangement indicated by the existing speaker arrangement information. Therefore, even when the surround mode information 400 is used, the audio signal of each channel can be mixed down into the audio signal corresponding to the actual speaker arrangement, as in the above embodiment, and the delay time T between the speakers can be reduced.
It is also possible to control d and the like.

As described above, according to this embodiment, D described in the above-mentioned “(I) Embodiment of information recording medium” is used.
The VD1 can be reproduced, and the surround sound field intended by the creator can be reproduced using the speaker arrangement unique to the viewer through the audio signals of the plurality of channels and the surround control information.

[0169]

According to the information recording apparatus of the first aspect, when reproducing the recorded information from the information recording medium, first of all,
Plays round control information and surround mode information
From the control data area corresponding to the partial audio information of
If read, the partial audio information recorded on each channel will be duplicated.
Which of the speakers is output from each speaker
Whether or not it should be set in advance based on the listener position.
The combination of the position of those speakers
It can be identified in the playback device. As a result, the playback device
, The partial audio information of multiple channels is supported.
Output from the speaker. Therefore , the creator can relatively easily specify the combination arrangement of a wide variety of speakers for multi-surround through the information recording medium, and the viewer can easily specify the surround sound field intended by the creator. It will be reproducible.

According to the information recording apparatus of the third aspect ,
When reproducing the recorded information from the information recording medium, first of all,
Command mode information that corresponds to the partial audio information to be played.
If you read from the control data area, the listener position is used as a reference.
The preset types of multiple speaker positions
The combination can be identified in the playback device. this
As a result, in the playback device, partial audio of multiple channels
Information can be output from the corresponding speaker. Obey
Thus , the creator can relatively easily specify the combination arrangement of a wide variety of speakers for multi-surround through the information recording medium, and the viewer can easily specify the surround sound field intended by the creator. It will be reproducible.

[0171]

[0172]

According to the information reproducing apparatus of the fifth aspect ,
The creator can specify and display a wide variety of multi-speaker combination arrangements through the information recording medium relatively easily, and the viewer can compare the surround sound fields intended by the creator. It can be reproduced easily.

According to the information reproducing apparatus of the sixth aspect ,
The creator can relatively easily specify the combination arrangement of a wide variety of speakers for multi-surround through the information recording medium, and the viewer can specify the actual speaker arrangement. Even if the arrangement does not match the arrangement of the speakers indicated by the surround control information, the surround sound field intended by the creator can be reproduced relatively easily.

According to the information reproducing apparatus of the seventh aspect,
Authors great variety through a relatively easily the information recording medium a combination arrangement of speakers for multi-surround can specify rich, the viewer relatively a surround sound field intended by the producer Easy to reproduce.

According to the information reproducing apparatus of the ninth aspect ,
The creator can relatively easily specify the combination arrangement of a wide variety of speakers for multi-surround through the information recording medium, and the viewer can specify the actual speaker arrangement. Even if the arrangement does not match the arrangement of the speakers indicated by the surround mode information, the surround sound field intended by the creator can be reproduced relatively easily.

According to the information reproducing apparatus of the tenth aspect , the surround sound field intended by the creator can be reproduced with relatively high accuracy by a relatively simple structure. In addition, claim 1
According to the information reproducing apparatus described in 1 , the pseudo stereophonic sound intended by the creator can be created using the reproducing apparatus. Furthermore,
According to the information reproducing apparatus of claim 12, the viewer is
Arrange multiple speakers according to speaker combination
And each speaker to the channel output of the corresponding playback device.
If you wire, after this, audio information of multiple channels
Is actually output from the speaker that should be output. this
As a result, the viewer can see that the surround sound field intended for production is accurate.
And it can be reproduced relatively easily.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a physical configuration of data in a DVD as an embodiment of the present invention.

2 is a conceptual diagram showing a logical configuration of data in the DVD of FIG.

3 is a conceptual diagram showing a configuration of an interleaved unit in the DVD of FIG.

FIG. 4 is a conceptual diagram showing an arrangement of 15 types of speakers placed in a room set for the DVD of FIG.

5 is a conceptual diagram showing an example of a data structure of surround control information written in the DVD of FIG. 1 and its corresponding relationship.

6 is a table showing an example of audio channel content data included in the surround control information of FIG.

7 is a conceptual diagram showing a speaker arrangement indicated by the audio channel content data of FIG.

8 is a table showing another example of audio channel content data included in the surround control information of FIG.

9 is a conceptual diagram showing a speaker arrangement indicated by the audio channel content data of FIG.

10 is a conceptual diagram showing an example of a data structure of surround mode information written on the DVD of FIG. 1. FIG.

11 is a conceptual diagram showing a speaker arrangement corresponding to one of a plurality of modes indicated by surround mode information in FIG.

FIG. 12 shows the DV of FIG. 1 as another embodiment of the present invention.
It is a block diagram of the information recording device for recording D.

FIG. 13 shows the DV of FIG. 1 as another embodiment of the present invention.
It is a block diagram of the information reproducing | regenerating apparatus for reproducing D.

14 is a plan view of a display screen showing one display screen on the display of the reproducing apparatus in FIG.

FIG. 15 is a plan view of a television screen showing one display screen on the television connected to the reproducing apparatus of FIG.

16 is a conceptual diagram showing an example of conversion of an audio signal in the reproducing apparatus of FIG.

FIG. 17 is a block diagram showing a downmix circuit connected to the audio output of the playback device of FIG.

18 is a conceptual diagram showing the arrangement of speakers for explaining the signal conversion method by the downmix circuit of FIG.

19 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion method by the downmix circuit of FIG.

20 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion method by the downmix circuit of FIG.

21 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion system by the downmix circuit of FIG.

22 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion method by the downmix circuit of FIG.

23 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion method by the downmix circuit of FIG.

24 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion system by the downmix circuit of FIG.

25 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion method by the downmix circuit of FIG.

FIG. 26 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion method by the downmix circuit of FIG.

27 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion system by the downmix circuit of FIG.

28 is a conceptual diagram showing an arrangement of speakers for explaining a signal conversion method by the downmix circuit of FIG.

29 is a conceptual diagram illustrating a method of determining the coefficient Cn of each amplifier by the downmix circuit of FIG.

30 is a conceptual diagram illustrating a method of determining the coefficient Cn of each amplifier by the downmix circuit of FIG.

31 is a conceptual diagram illustrating a method of determining the coefficient Cn of each amplifier by the downmix circuit of FIG.

32 is a conceptual diagram illustrating a method of determining a coefficient Cn of each amplifier by the downmix circuit of FIG.

33 is a conceptual diagram illustrating a method of determining the coefficient Cn of each amplifier by the downmix circuit of FIG.

34 is a conceptual diagram illustrating a method of determining the delay time Td of each amplifier by the downmix circuit of FIG.

FIG. 35 is a conceptual diagram illustrating a method of determining the delay time Td of each amplifier by the downmix circuit of FIG. 17.

36 is a conceptual diagram illustrating a method of determining the delay time Td of each amplifier by the downmix circuit of FIG.

FIG. 37 is a table showing surround mode information in the conventional Dolby AC3 system.

38 is a conceptual diagram showing a speaker arrangement corresponding to one of a plurality of modes indicated by surround mode information in the Dolby AC3 system in FIG. 37.

[Explanation of symbols]

1 ... DVD 2 ... Video manager 3, 63 ... VTS 10 ... VOB 11 ... Control data 20 ... Cell 30 ... VOB unit 41 ... Navi pack 42 ... Video pack 43 ... Audio pack 44 ... Sub picture pack 50 ... PCI packet 51 ... DSI Packet 52 ... GOP 60 ... Program 61, 61A, 61B ... PGC 62 ... Title 70 ... VTR 71 ... Memory 72 ... Signal processing unit 73 ... Hard disk device 74 ... Hard disk device 75 ... Controller 76 ... Multiplexer 77 ... Modulator 78 ... Mastering Device 80 ... Pickup 81 ... Demodulation correction section 82, 84 ... Stream switch 83 ... Track buffer 85 ... System buffer 86 ... Demultiplexer 87 ... VBV buffer 88 ... Video decoder 89 ... Sub picture buffer 90 ... Sub picture Cha decoder 92 ... Audio buffer 93 ... Audio decoder 94 ... PCI buffer 95 ... PCI decoder 96 ... Highlight buffer 97 ... Highlight decoder 98 ... Input unit 99 ... Display 100 ... System controller 101 ... Drive controller 102 ... Spindle motor 103 ... Slider Motors 120a, 120b, 120c, 120d ... Downmix circuit 300 ... Surround control information 400 ... Surround mode information S1 ... Recording device S2 ... Reproducing device DK ... Optical disc Sr ... Compression multiplexed signal Sa ... Additional information signal Sdm ... Demodulation signal Sad ... Audio Signal Ssp ... Sub video signal Sv ... Video signal

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Moriyama 6-1, 1-1 Fujimi, Tsurugashima City, Saitama Pioneer Corporation Research Institute (72) Inventor Akihiro Tozaki 6-1, 1-1 Fujimi, Tsurugashima City, Saitama Pioneer Research Institute, Inc. (72) Inventor, Junichi Yoshio, Tokorozawa, Saitama Prefecture, 426-10 Hanazono, Pioneer Co., Ltd., Tokorozawa Plant (56) Reference JP-A-8-336104 (JP, A) JP-A-8-31096 (JP, A) JP 5-327637 (JP, A) JP 5-234257 (JP, A) JP 5-325421 (JP, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) G11B 20/10 H04S 3/00

Claims (12)

(57) [Claims] 1. A reproducing device which relatively moves a reading means along a recording track on which recording information composed of a plurality of partial recording information each containing partial audio information and reproduces the partial audio information in surround. An information recording device for recording the partial audio information to be reproduced on an information recording medium, wherein a plurality of speakers to be output from a plurality of speakers existing at a position of a predetermined type preset with reference to a listener position. Surround control information indicating that the partial audio information of each channel is written on the recording track, and which of the plurality of speakers should output the partial audio information corresponding to each channel.
And the above-mentioned predetermined type preset based on the listener position
Surround mode information indicating a combination is written into the recording track in a distinguishable manner for each partial recording information as control data set for each partial recording information in order to control reproduction of each partial audio information. information recording apparatus comprising the Shokomite stage. 2. The information recording medium is a stamper disc
Yes, Manufacture replica discs using the stamper discs
It is further equipped with replication means for
The information recording device according to claim 1. 3. A reproducing apparatus for relatively reproducing the partial audio information by moving the reading means relatively along a recording track on which recording information composed of a plurality of partial recording information each containing partial audio information is recorded. An information recording device for recording the partial audio information to be reproduced on an information recording medium, which should be respectively output from a plurality of speakers arranged in a combination of a predetermined type based on a listener position. The partial audio information consisting of a plurality of channels is written on the recording track, and surround mode information indicating a combination of the predetermined type is set for each partial audio information in order to control reproduction of the partial audio information. to distinguish every the partial audio information as has been controlled data detectably said Bei recording tracks in writing Shokomite stage <br/> Etako An information recording device characterized by: 4. The information recording medium is a stamper disc
Yes, Manufacture replica discs using the stamper discs
It is further equipped with replication means for
The information recording device according to claim 3. 5. Partial audio information consisting of a plurality of channels to be output from a plurality of speakers existing at a position of a predetermined type set in advance based on the listener position is recorded, and each of the channels is recorded. Surround control information indicating from which of the plurality of speakers the corresponding partial audio information should be output, is set for each partial recording information in order to control reproduction of each partial audio information. An information reproducing apparatus for reproducing the partial audio information from an information recording medium that is detectably recorded separately for each of the partial recording information as the control data that has been recorded. A reading unit that reads the corresponding surround control information from the information recording medium, and a sound that demodulates the read partial audio information. Demodulation means, output means for outputting the demodulated partial audio information for each of the plurality of channels based on the read surround control information, and a portion of each channel based on the read surround control information An information reproducing apparatus comprising: a display unit that displays an image of which position of the speaker the audio information should be output from. 6. Partial audio information consisting of a plurality of channels to be respectively output from a plurality of speakers existing at a position of a predetermined type set in advance with the listener position as a reference is recorded, and each channel is recorded. Surround control information indicating from which of the plurality of speakers the corresponding partial audio information should be output, is set for each partial recording information in order to control reproduction of each partial audio information. It is an information reproducing apparatus for reproducing the partial audio information from the information recording medium recorded as the control data so that it can be detected separately for each partial recording information, and can specify the arrangement of the existing speakers. Means for reading the partial audio information and the surround control information corresponding to the partial audio information from the information recording medium A stage, an audio demodulation unit for demodulating the read partial audio information, and a difference between the position of the speaker indicated by the read surround control information and the position of the speaker specified by the specifying unit, An information reproducing apparatus, comprising: an output unit that converts the demodulated partial audio information into the partial audio information corresponding to a channel corresponding to the arrangement of the designated speaker and outputs the partial audio information. 7. The partial audio information consisting of a plurality of channels to be respectively output from a plurality of speakers arranged in a predetermined kind of combination set with a listener position as a reference is recorded, and the predetermined sound information is recorded. Information in which surround mode information indicating a combination of types is detectably recorded separately for each partial audio information as control data set for each partial audio information in order to control reproduction of each partial audio information. An information reproducing apparatus for reproducing the partial audio information from a recording medium, comprising: a reading unit for reading the partial audio information and the surround mode information corresponding to the partial audio information from the information recording medium; Audio demodulation means for demodulating the partial audio information, and the demodulated partial audio information for the read surround sound Information reproducing apparatus characterized by comprising a, and output means for outputting for each of the plurality of channels based on the over-de information. 8. In the read surround mode information
Based on the location of the partial audio information of each channel,
Display hand that displays what should be output from the speaker
8. The step according to claim 7, further comprising a step.
Information reproducing device. 9. The partial audio information consisting of a plurality of channels to be respectively output from a plurality of speakers arranged in a combination of a predetermined type preset with the listener position as a reference, and the predetermined audio information is recorded. Information in which surround mode information indicating a combination of types is detectably recorded separately for each partial audio information as control data set for each partial audio information in order to control reproduction of each partial audio information. An information reproducing apparatus for reproducing the partial audio information from a recording medium, the specifying means capable of specifying the arrangement of an existing speaker, the partial audio information and the surround mode information corresponding to the partial audio information. A reading means for reading from the information recording medium; a sound demodulating means for demodulating the read partial sound information; Based on the difference between the position of the speaker indicated by the specified surround mode information and the position of the speaker specified by the specifying means, the demodulated partial audio information is assigned to the channel corresponding to the arrangement of the specified speaker. An information reproducing apparatus, comprising: an output unit that converts and outputs the corresponding partial audio information. 10. The down means receives the partial audio information of the demodulated plurality of channels as input, and mixes down the input partial audio information with a variable gain determined according to the difference and outputs the down audio. The information reproducing apparatus according to claim 6 or 9 , further comprising a mixing unit. 11. The information reproducing apparatus according to claim 10 , wherein the downmix means delays the input partial audio information by a delay time determined according to the difference. 12. Partial audio information consisting of a plurality of channels to be respectively output from a plurality of speakers existing at a position of a predetermined type that is preset based on the listener position is recorded, and each of the channels is recorded. Surround control information indicating from which speaker of the plurality of speakers the corresponding partial audio information should be output, respectively, and the predetermined type preset based on the listener position
Surround mode information indicating a combination of the information is recorded as control data that is set for each of the partial record information in order to control the reproduction of each of the partial audio information and is detectably recorded for each of the partial record information. An information reproducing apparatus for reproducing the audio information from a recording medium, the reading means for reading the partial audio information and the surround control information and surround mode information corresponding to the partial audio information from the information recording medium, Audio demodulation means for demodulating the read partial audio information, and output means for outputting the demodulated partial audio information for each of the plurality of channels based on the read surround control information and surround mode information. An information reproducing apparatus characterized in that