JPWO2004051657A1 - Multiple recording medium and storage device - Google Patents

Abstract

Provided are a multiplex recording medium and a multiplex recording / reproducing apparatus on which mixing information for reproducing contents synchronously is recorded. Simply setting the recording medium in the playback device automatically reproduces the optimal settings. Even if the playback device is changed, since the mixing information is recorded on the medium, there is no need for resetting and it is possible to easily enjoy synchronized playback. In addition, it is possible to change the mixing condition during synchronous reproduction using the multiplex recording / reproducing apparatus, and to record the changed mixing condition in the RAM unit as new mixing information. As a result, the virtual session function and the multiplex recording function, which were limited to some specialists, can be easily and inexpensively realized.

Description

  The present invention relates to a storage device that synchronizes and reproduces a plurality of contents recorded on a medium and a recording medium used, and more particularly, to a storage device and a recording medium that synchronously reproduces and reproduces a plurality of contents according to recorded mixing information. .

A CD (Compact Disc) or the like in which music content is recorded in advance as a ROM (Read Only Memory) or the like, or a sound source such as a CD is recorded on an MD (Mini Disk) or the like using a magneto-optical medium. In addition to the enjoyment of playing and listening to music, there is also the enjoyment of playing an instrument yourself and recording and playing it.
One method of recording and playing back musical instrument performance is multiple recording. In multiplex recording, separate music is recorded for each track of a recording medium having a plurality of recording tracks. In other words, music is recorded in advance on the first track, and the sound is superimposed on another track while being reproduced and heard. For example, by recording a piano first and then recording the guitar while listening to the piano sound, the piano and the guitar can be reproduced simultaneously. Thus, in order to record and reproduce a plurality of tracks of music, or to simultaneously reproduce a plurality of tracks of music, a high-speed and large-capacity storage device is required, and a hard disk is mainly used.
However, a multiplex recording system using a hard disk is intended to produce music, and therefore requires advanced editing and is complicated to operate. Therefore, although a multiple recording system using a hard disk is used for a limited part, it is not widely used in general. In addition, since a magnetic recording medium such as a hard disk does not have a ROM portion such as a phase pit of an optical disk, in order to record music in advance, it is necessary to magnetically record music for each medium. There is also a problem of rising.
A multiplex recording system using an MD (Mini Disk) as a medium that is simpler and easier to handle than a hard disk is also realized. The use of MD makes the medium inexpensive, but it is the same as a device using a hard disk in that the user has to record music sequentially on a plurality of tracks. In order to record music information in advance at the time of shipment, as in the case of a hard disk, it is necessary to perform magneto-optical recording for each MD, which increases the medium cost. There is also a problem that the recording capacity is reduced by the amount recorded in advance on a plurality of tracks. Therefore, although a conventional multiple recording system using a recording MD is also used by some specialists, it is generally not widespread.
As described above, with the exception of some specialists, the way of enjoying music by multiple recording and synchronized reproduction of multiple recorded music is generally not very popular.
In recent years, concurrent ROM / RAM systems and partial ROM systems have been introduced as methods that have the potential to realize the functions of multiple recording and synchronized playback at low cost. For example, Japanese Patent Laid-Open No. 7-65375 proposes a method of recording another music or image information in the RAM portion at the same position in synchronization with the music or image information recorded in advance in the ROM portion using phase pits. . In addition, a method of synchronizing and reproducing music information divided and recorded using the partial ROM method as in Japanese Patent Laid-Open Nos. 5-151758 and 11-7729 has been proposed.
However, any of these proposals is a method related to temporal synchronization of contents, and it is unclear about adjustment of mixing conditions such as output level ratio or waveform characteristics when a plurality of contents are synchronously reproduced (mixed). For example, when music contents are multiplexed and played back, it is necessary to synchronize the music contents in time. At the same time, it is important to adjust the mixing conditions when mixing the music contents. It is extremely difficult to listen to music with sufficient quality by mixing without adjusting the output ratio or waveform.
In general, it is difficult to predict and determine the optimum output ratio or waveform adjustment amount of each music content at the time of recording, and it is preferable that it can be freely set at the time of reproduction after recording. Furthermore, it is necessary to change the output in the middle of the song. For example, when a guitar performance is multiplexed and recorded while reproducing a ROM portion in which vocals and accompaniment are recorded in advance, it is generally performed to insert an interlude portion between the first and second songs. In order to record a guitar solo at a high volume in this interlude part and a rhythm sound at a low volume in the other part, it is necessary to change the mixing conditions at any timing during the song.
Since these pieces of mixing information are set uniquely for each music content, it is preferable to record them on individual recording media. Also, it should be easy to set according to the user's preference.
Japanese Patent Laid-Open No. 2002-171482 discloses another method related to multiplex recording in which multiplex recording is performed after optimally adjusting the output of audio data in advance. Therefore, it is difficult to realize high-quality music reproduction everywhere.
In addition, as a method related to volume adjustment among mixing conditions, Japanese Patent Laid-Open No. 2000-173171 discloses a method in which a volume level for each music content can be additionally recorded in a TOC (Table Of Contents) area. A plurality of music contents multiplexed and recorded for each song cannot be reproduced synchronously with high quality.

The object of the present invention is to realize a multiplex recording function and a synchronized reproduction function of multiplex-recorded contents that have been limited to some experts so far, easily and inexpensively, and reproduce contents with sufficient quality. To provide a storage device and a multiple recording medium.
Another object of the present invention is to provide a multiplex recording medium and a storage device that can synthesize and synchronize a plurality of contents recorded on a multiplex recording medium, and can reproduce the mixing information at the time of reproduction without setting each reproduction. It is to provide.
Another object of the present invention is to provide a multiplex recording medium and a storage device capable of changing mixing information when synthesizing and reproducing a plurality of contents and reproducing the changed settings. is there.
The above object is to provide a disc-shaped multiple information recording medium in which a ROM portion in which information is recorded with phase pits utilizing light reflectance and a RAM portion that can be recorded and reproduced by light are arranged in layers. A first area having content, a second area having second content, and a second information having mixing information used when the first and second contents are synchronously synthesized and reproduced. This is achieved in a first aspect of providing a multiple recording medium characterized by having three regions.
The object is preferably that in the first aspect, the first area is formed in the ROM section, the second and third areas are formed in the RAM section, and the ROM section and This is achieved in a second aspect of providing a multiple recording medium in which the RAM section is superposed.
In addition, the object is preferably that, in the first aspect, the first and second areas are formed in the ROM section which can only be read, and the third area is additionally rewritable. This is achieved in a third aspect of providing a multiple recording medium formed in a RAM portion, wherein the ROM portion and the RAM portion are superposed.
Also, the above purpose is to arrange the ROM part where information is recorded with phase pits using light reflectance and the RAM part that can be recorded and reproduced by light at different positions in the radial direction or different positions in the circumferential direction. In the disc-shaped multiple information recording medium thus formed, a first area having the first content is formed in the ROM unit, a second area having the second content, the first and the second This is achieved in a fourth mode of providing a multiplex recording medium characterized in that the RAM area is formed with a third area having mixing information used when synthesizing and reproducing the contents of the same .
The fifth object of the present invention is to provide a multiple recording medium according to any one of the second to fourth aspects, wherein the RAM section is formed of a magneto-optical recording film. Achieved in an embodiment.
Further, the object is preferably that in any one of the first to fourth aspects, the mixing information is output level ratio information of the first and second contents or the first and second contents. This is achieved in a sixth aspect of providing a multiplex recording medium characterized by having waveform characteristic information of the content of
In the sixth aspect, the object is preferably the mixing information, wherein the mixing information further includes timing information for changing the output level ratio or the waveform characteristic during synchronous reproduction. This is achieved in a seventh aspect of the present invention.
The above-described object is to provide a multiple recording having a read-only ROM portion having a first content recorded by phase pits utilizing light reflectivity and a second content and a rewritable RAM portion having mixing information. According to the mixing information, an optical pickup that irradiates light to the medium and separates and detects information of the ROM unit and the RAM unit, a magnetic head for recording information on the RAM unit together with the irradiation light, and the mixing information This is achieved in an eighth aspect of the invention which provides a storage device comprising a controller that generates a reproduction signal by synchronously synthesizing the first and second contents.
Preferably, in the eighth aspect, the controller further includes a mixing condition input unit that inputs mixing information, and the first and second contents are input during synchronous playback. This is achieved in a ninth aspect that provides a storage device in which mixing information is recorded in the RAM section.
In the eighth aspect, preferably, the controller further includes a mixing condition input unit for inputting mixing information, and inputs the first and second contents during synchronous playback. According to the tenth aspect of the present invention, there is provided a storage device characterized in that the reproduction states of the first and second contents are changed according to the mixed information.
Also, in the above object, preferably, in any one of the eighth to tenth aspects, the mixing information is output level ratio information of the first and second contents or the first and second contents. This is achieved by an eleventh aspect of providing a storage device characterized by having the waveform characteristic information of the content.
The above object is preferably the storage device according to the eleventh aspect, wherein the mixing information further includes timing information for changing the output level ratio or the waveform characteristic during synchronous reproduction. This is achieved in the twelfth aspect provided.
In the twelfth aspect, the object is preferably characterized in that the controller changes the first and second output level ratios or waveform characteristics during synchronous reproduction based on the timing information. This is achieved in a thirteenth aspect of providing a storage device.
In addition, the above object has a read only ROM portion having the first content recorded by the phase pit using the light reflectance and a second rewritable RAM portion having the second content and mixing information. An optical pickup that irradiates light to the multiple recording medium and detects information of the ROM unit and the RAM unit; and a buffer memory that temporarily stores the first and second contents detected by the optical pickup; A reproduction signal is generated by synthesizing and synthesizing the first and second contents stored in the buffer memory according to the mixing information together with a magnetic head for recording information in the RAM unit together with the irradiation light. This is achieved in a fourteenth aspect of providing a storage device comprising a controller.
In this way, by recording the mixing information for synchronously reproducing the content on the medium, the optimum setting is automatically reproduced simply by setting the multiple recording medium of the present invention in the storage device. Even if the storage device is changed, since the mixing information is recorded on the medium, there is no need for resetting, and it is possible to easily enjoy synchronized reproduction. Further, by using the storage device of the present invention, it is possible to change the mixing conditions during synchronous reproduction, or to record the changed mixing conditions in the RAM unit as new mixing information. This makes it possible to easily and inexpensively implement the multiplex recording function and the synchronized reproduction function of the multiplex recorded content.

FIG. 1 is a configuration diagram of a multiplex recording / reproducing system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a configuration example of a concurrent ROM / RAM medium.
FIG. 3 is a diagram showing ROM information and RAM information in a concurrent ROM / RAM medium.
FIG. 4 is a diagram showing an embodiment of a multiple recording medium according to the present invention.
FIG. 5 is a diagram illustrating an example of a data format of the RAM unit.
FIG. 6 is a diagram showing another embodiment of a multiple recording medium according to the present invention.
FIG. 7 is a diagram showing an example of a data format recorded in the TOC area.
FIG. 8 is a diagram showing another embodiment of a multiple recording medium according to the present invention.
FIG. 9 is a diagram showing another embodiment of a multiple recording medium according to the present invention.
FIG. 10 is a diagram showing another embodiment of a multiple recording medium according to the present invention.
FIG. 11 is a diagram illustrating a configuration example of a multiplex recording / reproducing apparatus.
FIG. 12 is a block diagram illustrating a configuration example of a multiplex recording / reproducing apparatus.
FIG. 13 is a diagram illustrating combinations of signal detection in each mode.
FIG. 14 is a block diagram showing an embodiment of the main controller.
FIG. 15 is a block diagram showing another embodiment of the main controller.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited by such embodiments. In the embodiment, music content is described as an example, but the effect of the present invention is not limited to music, and the same effect can be obtained with an image or the like. In the embodiment of the present invention, the name of the storage device of the present invention is described as a multiplex recording / reproducing apparatus, but the target medium is not limited to the multiplex recording medium.
Hereinafter, an embodiment of a multiplex recording medium according to the present invention, an embodiment of a multiplex recording / reproducing apparatus, an application form using the multiplex recording medium, and the multiplex recording / reproducing apparatus will be described in this order.
FIG. 1 is a configuration diagram of a multiplex recording / reproducing system according to an embodiment of the present invention. This figure will be described by taking as an example a music content multiplex recording method and a synchronized playback method. The performer performs using an input device such as a guitar 1A, a microphone 1B, and a piano 1C. The played sound is converted into an electric signal and input to the multiplex recording / reproducing apparatus 2A. The multiplex recording / reproducing apparatus 2A converts the input electric signal into a digital signal by an analog / digital (A / D) converter, and then records the signal on the multiplex recording medium 2B.
At this time, music ROM information (music content) recorded in advance as, for example, phase pits on the same multiplex recording medium 2B is read, and the multiplex recording / playback apparatus 2A performs the played sound and the read music ROM information. Are combined and digital-analog (D / A) conversion is performed, and then the combined electrical signal is output to an output device such as the speaker 3A. Thus, multiple recording and synchronized reproduction are performed.
The music ROM information may be, for example, a band performance such as drum, bass, guitar, chorus, and vocal other than the musical performance part, or an orchestra performance. Alternatively, a sound with a constant interval may be used.
In any case, the performance of the musical instrument is performed while listening to the music information recorded in the ROM of the multiple information recording medium 2B. In other words, a virtual session that becomes a member of a band or orchestra is realized in a pseudo manner. Simultaneously with the reproduction of the music ROM information, the performance of the musical instrument is recorded on the same multiple recording medium 2B.
In FIG. 1, a signal 1D from a guitar is depicted as an input signal to the multiplex recording / reproducing apparatus 2A. However, a signal from a microphone, piano, or other musical instrument or sound source may be used. It is also possible to use a synthesized signal. This input signal 1D is recorded in a RAM portion made of a magneto-optical recording film if, for example, a later-described concurrent ROM / RAM medium is used as the multiple recording medium 2B. In the case of a partial ROM disk described later, it is recorded in the RAM section.
An output signal 3B to the speaker 3A in FIG. 1 is a reproduction signal of music information recorded in advance as a ROM on the multiple recording medium 2B. Further, it may be synthesized with the performance sound input to the multiplex recording / reproducing apparatus 2A and output by the speaker 3A. Further, the speaker 3A may be built in the multiplex recording / reproducing apparatus 2A. Although not shown, headphones can be used as the output device.
Since the performance of the orchestra and the band is recorded in the ROM section, not the multiple tracks assigned to each instrument, the complex volume and sound quality adjustments required for conventional multitrack recording are performed in the ROM section. It is possible to listen to high-quality music easily without the need. Of course, a simple single musical instrument performance may be recorded in the ROM section. By recording the mixing information on the medium in this way, music can be played back under the same conditions even if the playback device is changed. Also, there is no need to optimize the mixing conditions during recording.
Next, the multiple recording medium 2B of the present invention will be described.
[Multiple recording media]
FIG. 2 is a diagram illustrating a configuration example of a concurrent ROM / RAM medium. A protective coat 22, a reflective layer 23, a dielectric layer 24, and a magneto-optical recording layer 25 are formed on the transparent substrate 26. ROM information that can only be read is recorded by the concavo-convex phase pits 21 that cannot be physically rewritten, and additional rewritable RAM information is recorded in the magneto-optical recording layer 25.
FIG. 3 is a diagram showing ROM information and RAM information in a concurrent ROM / RAM medium. As described with reference to FIG. 2, ROM information 31 is recorded as an uneven signal in the phase pit 21, and RAM information 32 is recorded in the magneto-optical recording layer 25 so as to overlap the ROM information 31. Utilizing the feature that ROM information and RAM information are superposed and arranged, both are synchronized and reproduced. In this specification, a portion where ROM information is recorded is called a ROM portion, and a portion where RAM information is recorded is called a RAM portion.
FIG. 4 is a diagram showing an embodiment of a multiple recording medium according to the present invention. A concurrent ROM / RAM medium is used as the medium. In the area 41, RAM information is superimposed and recorded in correspondence with the n-th ROM information, and in the area 42, RAM information is superimposed and recorded in correspondence with the n + k-th ROM information. Taking advantage of the characteristics of the concurrent ROM / RAM medium, the corresponding RAM information can be reproduced synchronously when reproducing the n-th ROM information. Similarly, the n + k-th song can be reproduced synchronously.
Mixing information for synchronously reproducing the n-th ROM information (first content) in the area 41 and the corresponding RAM information (second content) is recorded in the RAM section of the area 41. Similarly for the area 42, the mixing information is recorded in the RAM area of the area 42.
FIG. 5 is a diagram showing an example of the data format of the RAM unit in the embodiment of FIG. A TOC (Table Of Contents) area 51 exists at the head of the content 52. In the TOC area 51, in addition to the TOC information 53 such as the song title 53A, the performance time 53B, and the content address 53C of the content 52, as the mixing information 54, for example, other content information 54A to be played back synchronously, It includes output level ratio information 54B, waveform characteristic information 54C, and timing information 54D.
The content address 53C is an address on the medium indicating the start position of the content 52. The content is specified by the address. The other content information 54A to be synchronously reproduced is information for identifying the first content corresponding to the RAM information (second content) in the case of the area 41 in FIG. This may be the address of the first content, or the number can be recorded if the content can be identified by the number.
The output level ratio information 54B records the output level ratio of each content to be played back synchronously. An absolute power level may be recorded instead of a relative ratio. For example, the output level is determined based on the volume.
In the waveform characteristic information 54C, the waveform characteristics of each content to be synchronously reproduced are recorded. The waveform characteristic indicates, for example, the strength of each frequency band divided into a certain range. Or, if there is a set mode (for example, the acoustic state such as concert hall mode, live house mode, outdoor mode, or the mode classified by performance mode such as vocal, classical, opera, orchestra, etc.), specify it. It may be information.
In the timing information 54D, for example, medium address information at a timing to apply the output level ratio information and the waveform characteristic information is recorded. For example, the mixing condition is applied when reproducing a specified address in the second content.
Further, time information may be recorded as the timing information 54D. For example, if 1 minute is designated, the output level ratio information and the waveform characteristic information are applied for the first minute from the start of synchronous reproduction. When the mixing condition is changed at a plurality of timings during synchronous reproduction, a plurality of output level ratio information 52 and waveform characteristic information 53 are recorded for each changed section.
In addition, information for controlling the frequency domain, information for controlling the amplitude domain, information for controlling the time domain, and the like can be used as the mixing information. Examples of information for controlling the frequency domain include equalizer (graphic equalizer, parametric equalizer) information, filter information, and the like. The information for controlling the amplitude region includes, for example, compressor limiter information that changes according to the amplitude of the input signal without changing the input / output amplitude characteristics in a one-to-one linear relationship as in a normal amplifier, and signals below a predetermined level. There are noise gate information and expander information to be cut.
Information for controlling the time domain includes, for example, digital delay information for obtaining an effect such as thickening a sound by delaying a signal, and digital reverb information for reproducing a reverberation effect in a concert hall or the like. Therefore, for example, the numerical value for each frequency band set as equalizer information can be recorded as mixing information, the predetermined level as noise gate information, and the delay time as digital delay information.
As shown in FIGS. 3, 4, and 5, by recording the mixing information when the contents are synchronously reproduced on the medium, the optimum setting is automatically set by simply setting the multiplex recording medium of the present invention in the reproducing apparatus. It is reproduced. Even if the playback device is changed, since the mixing information is recorded on the medium, there is no need for resetting and it is possible to easily enjoy synchronized playback. Further, by using a multiplex recording / reproducing apparatus described later, it is possible to change the mixing conditions during synchronous reproduction, or to record the changed mixing conditions in the RAM unit as new mixing information.
FIG. 6 is a diagram showing another embodiment of a multiple recording medium according to the present invention. A concurrent ROM / RAM medium is used as the medium. In the embodiment of FIG. 4, a TOC area is provided for each content, but this is an example in which TOC information of all contents is recorded in a TOC area provided on the innermost periphery of the recording medium.
Unlike the data area 62, the TOC area 61 does not record music content. Since it is a concurrent ROM / RAM medium, the TOC area 61 has a ROM portion in which ROM information is recorded by phase pits and a RAM portion in which RAM information is recorded in the magnetic recording layer.
The ROM portion of the TOC area 61 contains the TOC information of the content recorded in the ROM portion of the data area 62, and the RAM portion of the TOC area 61 contains the TOC information of the content recorded in the RAM section of the data area 62. To be recorded.
FIG. 7 is a diagram showing an example of a data format recorded in the TOC area. FIG. 7A shows an example of the data format of the ROM portion of the TOC area 61. It includes the number of songs 7a1, content address 7a2, song title 7a3, and performance time 7a4 recorded in the ROM portion of the data area 62. FIG. 7B is an example of the data format of the RAM portion of the TOC area 61. It includes the number of songs 7b1, content address 7b2, song title 7b3, performance time 7b4, and mixing information 7b5 recorded in the RAM portion of the data area 62. The data format of the mixing information 7b5 corresponds to, for example, the mixing information 54 in FIG.
As shown in FIGS. 6 and 7, the TOC area including the mixing information is arranged on the innermost periphery of the recording medium, thereby taking advantage of the characteristics of the concurrent ROM / RAM medium and simultaneously reading the TOC information regarding the contents of the ROM section and the RAM section. It is possible to improve the operation speed of the apparatus.
In addition, by recording the mixing information when the content is synchronously reproduced on the medium, the optimum setting is automatically reproduced simply by setting the recording medium in the reproduction apparatus. Even if the playback device is changed, since the mixing information is recorded on the medium, there is no need for resetting and it is possible to easily enjoy synchronized playback. Further, by using a multiplex recording / reproducing apparatus described later, it is possible to change the mixing conditions during synchronous reproduction, or to record the changed mixing conditions in the RAM unit as new mixing information.
In FIG. 6, the TOC area 61 is disposed on the innermost periphery of the recording medium. However, for example, it can be disposed on the outermost periphery.
FIG. 8 is a diagram showing another embodiment of a multiple recording medium according to the present invention. A concurrent ROM / RAM medium is used as the medium. This is an example in which the ROM part is divided into two or more sub areas, and the mixing information when the contents of each sub area are synchronously reproduced is recorded in the RAM part.
In FIG. 8, the information is divided into two sub areas, the first content is recorded in the sub area 81, the second content is recorded in the sub area 82, and the first and second contents are synchronously reproduced. Is recorded in a RAM unit (not shown) superimposed on the ROM unit. The data format of the mixing information recorded in the RAM unit is, for example, the same as the mixing information 54 in FIG.
As shown in FIG. 8, a plurality of sound sources can be mixed. That is, the user can freely select the mixing target by recording only the drum and the bass for the first content and recording the chorus of the second content for the guitar.
FIG. 9 is a diagram showing another embodiment of a multiple recording medium according to the present invention. This is an example of using a recording medium that has a ROM portion and a RAM portion on the recording medium but is not superposed.
In FIG. 9, the first content is recorded in the ROM area 91, the second content is recorded in the RAM area 92, and the mixing information used when the first and second contents are synchronously reproduced is recorded in the RAM area 92. Is done. The data format of the RAM area 92 is, for example, as shown in FIG.
As shown in FIG. 9, by recording the mixing information for synchronously reproducing the content on the medium, the optimum setting is automatically reproduced only by setting the recording medium in the reproducing apparatus. Even if the playback device is changed, since the mixing information is recorded on the medium, there is no need for resetting and it is possible to easily enjoy synchronized playback. Further, by using a multiplex recording / reproducing apparatus described later, it is possible to change the mixing conditions during synchronous reproduction, or to record the changed mixing conditions in the RAM unit as new mixing information.
FIG. 10 is a diagram showing another embodiment of a multiple recording medium according to the present invention. This is another example in which a recording medium having a ROM part and a RAM part on the recording medium but not superposed is used.
In FIG. 10, the ROM area 101 and the RAM area 102 are divided in the circumferential direction, unlike FIG. 9 in which the ROM area and the RAM area are divided in the radial direction. The first content is recorded in the ROM area 101, the second content is recorded in the RAM area 102, and the mixing information used when synchronously reproducing the first and second contents is recorded in the RAM area 102. The data format of the RAM area 102 is, for example, as shown in FIG.
As shown in FIG. 10, by recording the mixing information for synchronously reproducing the content on the medium, the optimum setting is automatically reproduced simply by setting the recording medium in the reproducing apparatus. Even if the playback device is changed, since the mixing information is recorded on the medium, there is no need for resetting and it is possible to easily enjoy synchronized playback. Further, by using a multiplex recording / reproducing apparatus described later, it is possible to change the mixing conditions during synchronous reproduction, or to record the changed mixing conditions in the RAM unit as new mixing information.
Next, the multiplex recording / reproducing apparatus 2A of the present invention will be described.
[Multi-recording / playback device]
FIG. 11 is a diagram illustrating a configuration example of the multiplex recording / reproducing apparatus 2A. Here, the concurrent ROM / RAM medium of FIG. 6 is used as the multiple recording medium 2B. As an example of the data format, the mixing information 54 of FIG. 5 and FIG. 7 are applied. An example of changing the mixing conditions during reproduction will be described. When a concurrent ROM / RAM medium is set, and the content (song) recorded in the ROM part is selected by the content selection means 111, the contents of the RAM part corresponding to the selected song are synchronously played back. The output level ratio and the like are adjusted based on the recorded mixing information 7b5.
Next, an example of a method for performing mixing while recording after recording will be described in detail. When a multiplex recording medium is inserted into the multiplex recording / reproducing apparatus 2A, the apparatus first reads the TOC area 61, reads the position 7b2, the mixing information 7b5, etc. of each content, and holds them in a TOC memory described later. Here, as an example, it is assumed that the k-th song is selected by the content selection unit 111.
The multiplex recording / reproducing apparatus 2A reproduces the k-th song according to the mixing information 7b5 recorded in the TOC memory. Here, according to the waveform characteristic information 54C recorded in the TOC memory, the equalizer of the first content recorded in the ROM portion and the second content recorded in the RAM portion is set, and the sound quality is adjusted. Further, the volume ratio is adjusted by the volume ratio adjuster in accordance with the output level ratio information 54B.
The ROM and RAM signals are combined and then converted into analog signals by a D / A converter and output from a speaker. While listening to it, the user manually operates the RAM volume adjusting means 113, the ROM volume adjusting means 114, the RAM sound quality adjusting means 115, the ROM sound quality adjusting means 116, etc. (hereinafter referred to as mixing condition buttons) to adjust to the desired conditions. To do. Further, by pressing the decision button 117, a new mixing condition is recorded in the TOC memory. The new mixing condition recorded in the TOC memory is recorded as update information in the TOC area 61 of the multiple recording medium 2B when the reproduction of the music is completed.
Thus, at the next playback, it is possible to apply new mixing conditions and perform synchronized playback, and the user can adjust the sound quality according to his / her preference. The new mixing condition is overwritten or preferably added in the RAM unit, and when a plurality of mixing conditions exist at the time of synchronous reproduction, it is preferable that the mixing condition to be applied can be selected.
Next, the form which changes mixing conditions in the middle of a music is demonstrated. During synchronized playback, the mixing condition button is adjusted to the user's preferred conditions, and when the enter button 117 is pressed, the timing information 54D is written to the TOC memory in addition to the volume and sound quality. The timing information is time information from the start of synchronous reproduction, absolute address information where content is recorded, and the like. When the music is finished, timing information is written in the TOC area 61 as mixing information in addition to the volume and sound quality of the RAM.
At the time of the next reproduction, by performing synchronous reproduction based on the updated mixing information 54D, the mixing condition is changed at the set timing, and music can be reproduced under the optimum mixing condition. By such a method, for example, the RAM volume can be set low in the rhythm performance portion of the guitar, and the RAM volume can be set high in the guitar interlude portion where the vocal is temporarily interrupted.
The recording start button 118 is used when the performer starts multiple recording. Inserting the multiplex recording medium 2B in which contents are recorded in the ROM section and pressing this button starts playback of the contents in the ROM section and records the input signal of the musical instrument played while listening to the contents in the RAM section. Is possible.
The mixing mode switching unit 112 is used to switch the mixing mode. For example, mode 0 is a normal playback mode, mode 1 is a mode that enables a mixing condition button such as RAM volume adjusting means 113, mode 2 is a mode that allows timing information to be updated, and a plurality of conditions are set. Mixing mode switching means is used for switching the conditions.
FIG. 12 is a block diagram illustrating a configuration example of a multiplex recording / reproducing apparatus. As shown in FIG. 12, the motor 121 rotates the multiple recording medium 2B. Usually, the multiplex information recording medium 2B is a removable medium and is inserted from an insertion slot of a drive (not shown). The optical pickup 122 has a magnetic head 123 and an optical head arranged so as to sandwich the multiple recording medium. The optical pickup 122 is moved by a track actuator (not shown) such as a ball screw feeding mechanism, and can access any position in the radial direction of the multiple recording medium 2B. An LD driver 124 for driving the laser diode LD of the optical head and a magnetic head driver 125 for driving the magnetic head 123 of the optical pickup 122 are provided.
The main controller 126 includes an access servo controller and a controller, which will be described later with reference to FIG. 14 or FIG. The access servo controller servo-controls the track actuator, the motor 121, and the focus actuator 127 of the optical head based on the output from the optical head. The controller operates the LD driver 124, the magnetic head driver 125, and the access servo controller to record and reproduce information.
Details of the optical head will be described with reference to FIG. The diffused light from the laser diode LD is converted into parallel light by the collimator lens 128, and is condensed on the multiple information recording medium 2B by the objective lens 130 to the diffraction limit via the polarization beam splitter 129.
A part of the light incident on the polarization beam splitter 129 is reflected by the polarization beam splitter 129 and condensed on an APC (Auto Power Control) detector 132 via a condenser lens 131.
The light reflected by the multiple information recording medium 2B is incident again on the beam splitter 129 via the objective lens 130 again. A part of the light that has entered the beam splitter 129 again returns to the laser diode LD side, and the remaining light is reflected by the beam splitter 129 and enters the polarizing beam splitter 133.
Part of the light incident on the polarization beam splitter 133 is condensed on the two-divided detector 136 via the two-beam Wollaston prism 134 and the condenser lens 135. The other part of the light incident on the polarization beam splitter 133 is condensed on the servo detection quadrant detector 139 via the condenser lens 137 and the cylindrical lens 138.
A FES (Focus Error Signal) reproducing circuit 140 performs focus error detection (FES) by an astigmatism method based on outputs A, B, C, and D of the photoelectrically converted quadrant photodetector 139. That is,
FES = (A + B) − (C + D) / (A + B + C + D)
At the same time, the track error detection (TES) is performed from the output of the quadrant detector 139 by the push-pull TES generation circuit 141.
The focus error signal (FES) and the track error signal (TES) obtained by these calculations are input to the main controller 126 (specifically, an access servo controller) as a position error signal in the focus direction and the track direction. .
On the other hand, in the recording information detection system, the polarization characteristic of the reflected laser light that changes depending on the magnetization direction of the magneto-optical recording on the multiple recording medium 2B is converted into light intensity. In other words, the two-beam Wollaston prism 134 separates two beams whose polarization directions are orthogonal to each other by polarization detection, enters the two-divided photodetector 136 through the condenser lens 135, and is photoelectrically converted.
The two electric signals G and H photoelectrically converted by the two-divided photodetector 136 are amplified by the amplifiers 142 and 143, and then added by the adding amplifier 144 to become the first ROM signal (ROM1 = G + H), and simultaneously subtracted. Subtracted by the amplifier 145 to become a RAM read (MO) signal (RAM = G−H), which is input to the main controller 126 respectively.
In addition, the reflected light of the semiconductor laser diode LD incident on the APC photodetector 132 is photoelectrically converted into the main controller 126 and input through the amplifier 146 as the second ROM signal (ROM2).
Further, as described above, the main controller 126 includes the first ROM signal (ROM1) that is the output of the addition amplifier 144, the RAM signal (RAM) that is the output of the differential amplifier 145, and the FES generation circuit 140. The focus error signal (FES) and the track error signal (TES) from the TES generation circuit 141 are input.
Also, recording data and read data are input to and output from the main controller 126 through the interface circuit 148 with the data source 147.
The first ROM signal (ROM1 = G + H), the second ROM signal (ROM2 = I), and the RAM signal (RAM = GH) input to the main controller 126 are reproduced in each mode, that is, ROM and RAM simultaneously. Detected and used in response to ROM playback and RAM simultaneous recording (WRITE).
FIG. 13 is a diagram illustrating combinations of detection of the ROM1 signal (= G + H), the ROM2 signal (= I), and the RAM signal (= GH) in each mode. The main controller 126 generates a command signal for the LD driver 124 according to each mode. The LD driver 124 performs negative feedback control of the light emission power of the semiconductor laser diode LD according to the first ROM signal (ROM1 = G + H) during ROM and RAM reproduction according to the command signal. The light emission power of the semiconductor laser diode LD is negatively feedback controlled in accordance with the ROM signal 2 (ROM2 = I).
During magneto-optical (RAM) recording, data from the data source 147 is input to the main controller 126 through the interface 148. The main controller 126 supplies this input data to the magnetic head driver 125 when the magnetic field modulation recording method is used. The magnetic head driver 125 drives the magnetic head 123 and modulates the magnetic field corresponding to the recording data.
At this time, the main controller 126 sends a signal for instructing recording to the LD driver 124 so that the LD driver 124 has an optimum laser power for recording according to the second ROM signal (ROM2 = I). The light emission of the semiconductor laser diode LD is controlled by negative feedback.
When the optical modulation recording method is used, this input data is sent to the LD driver 124, and the laser diode LD is optically modulated. At this time, in the main controller 126, a signal for instructing recording is sent to the LD driver, and the LD driver 124 is configured so that the laser power is optimal for recording in accordance with the second ROM signal (ROM2 = I). The light emission of the laser diode LD is controlled by negative feedback.
In addition, the main controller 126 (specifically, the servo controller) drives the focus actuator 127 in accordance with the detected focus error signal FES to control the focus of the light beam. The main controller 126 (specifically, its servo controller) drives the track actuator in accordance with the detected track error signal TES, and performs seek and track following control of the light beam.
Here, G + H (ROM1) of the detector 136 or I (ROM2) signal of the detector 132 is used to adjust the laser power. As shown in FIG. 13, when the ROM signal and the RAM signal are reproduced simultaneously, the RAM read signal (= G−H) is G + H so as not to receive crosstalk from the phase pit modulation of the multiple recording medium 2B. The laser power is controlled so that the above signal becomes constant. During light modulation recording, ROM detection is not performed.
The multiplex recording / reproducing apparatus 2A shown in FIG. 12 and FIG. 13 has a configuration in which an optical pickup for reading information in the ROM and RAM and a magnetic head for recording information in the RAM are provided. In this configuration, the RAM signal can be reproduced while reproducing the ROM.
Further, by negatively feeding back the ROM1 signal to the laser drive unit, intensity modulation noise to the RAM signal due to the unevenness of the ROM part of the recording medium can be reduced, so that the RAM signal can be detected accurately. At this time, the ROM signal can be detected from the ROM 2. The optical pickup can access an arbitrary radial position of the storage medium by a seek mechanism based on a ball screw feeding mechanism. Therefore, it is possible to arbitrarily access content recorded in the ROM and content recorded in the RAM. In addition to the ball screw feed mechanism, a voice coil motor (VCM) system, a rack and pinion system using a motor and a gear, or the like may be employed.
FIG. 14 is a block diagram showing an embodiment of the main controller 126 of FIG. This is an example of the main controller of the multiple recording / reproducing apparatus 2A that can be used for simultaneous reproduction using the concurrent ROM / RAM medium of FIGS. 4, 6, 8 and the like described above as the multiple recording medium 2B.
The main controller 126 generates the second ROM signal (ROM2) through the amplifier 146, the first ROM signal (ROM1) that is the output of the addition amplifier 144, the RAM signal (RAM) that is the output of the differential amplifier 145, and FES generation. A focus error signal (FES) from the circuit 140 and a track error signal (TES) from the TES generation circuit 141 are input.
Also, recording data converted into a digital audio signal is input to the data source 147 through an interface circuit 148 including an A / D converter.
In the main controller 126, the output of the differential amplifier 145 which is RAM information at the time of simultaneous reproduction of ROM information and RAM information is synchronously detected by the synchronization detection circuit 201, and demodulation corresponding to NRZI modulation or the like is performed by the demodulator 202. Decoded by the decoder 203 and output as a digital audio RAM signal.
On the other hand, in ROM / RAM simultaneous reproduction, ROM 2 is used as the ROM signal. Similarly to the RAM signal, the ROM2 signal is also synchronously detected by the synchronization detection circuit 204, converted into a digital audio signal by the demodulator 205 and the decoder 203, and output as ROM data.
Here, since the RAM signal is outputted with a time delay, the time delay of the ROM signal is adjusted as necessary by a delay unit (not shown). This delay time may be arbitrarily adjusted by the user. Similarly, the RAM signal is also time-delayed as necessary by a delay unit.
The output ROM signal and RAM signal are respectively input to equalizers (sound quality adjusters) 206 and 207 and a sound volume adjuster 208, and are mixed by the mixing controller 210 based on the mixing information recorded in the TOC memory 209. Further, an input from the mixing condition input unit 211 having a setting knob or the like may be recorded in the TOC memory as mixing information, and control based on the input mixing information may be performed.
Thereafter, the signal is converted into an analog signal by the D / A converter 212 and output to the speaker, the headphone 31 and the like as music. In this way, the ROM content and the RAM content are synchronously reproduced and synthesized and output.
Next, at the time of ROM reproduction and RAM recording, the ROM1 signal is used as a reproduction ROM signal as shown in FIG. By switching the switch SW2, the ROM1 signal is synchronously detected by the synchronization detection circuit 204 via the low-pass filter 213, converted into a digital audio signal by the demodulator 205 and the decoder 203, and output as ROM data. The ROM data is converted into an analog music signal by the D / A converter 212, and then output as music to the speaker 3A or the like.
In order to record music such as guitar and sound in the RAM while listening to this music, first, the input switch 214 is turned on by the recording start button 118 described above. As a result, the analog signals output from the guitar 1A, the microphone 1B, and the piano 1C are converted into digital signals by the A / D converter 215, and the error correction is encoded by the encoder / modulator 216. , EFM, NRZI, etc.
Thereafter, the magnetic head controller 217 drives the magnetic head 123, and the converted information is recorded in the RAM portion of the multiple recording medium 2B. In addition, when new mixing information is input, after the music is reproduced, the information recorded in the TOC memory 209 is recorded in the RAM section of the multiple recording medium 2B.
The multiple recording / reproducing apparatus 2A shown in FIGS. 12, 13, and 14 synchronously reproduces a plurality of contents according to the mixing information recorded in the RAM unit, and sets information input during the synchronous reproduction as new mixing information. It is possible.
FIG. 14 shows equalizers 206 and 207 corresponding to the sound quality adjusting means depicted in FIG. 11. In addition, a filter, a compressor limiter that changes the input / output amplitude characteristics according to the amplitude of the input signal, Noise gate, expander that cuts signals below the specified level, digital delay for delaying the signal, and digital delay for thickening the sound, or digital reverb for reverberation effects (tone processing equipment) It is also possible to replace with.
FIG. 15 is a block diagram showing another embodiment of the main controller 126 of FIG. This is an example of a main controller of a multiplex recording / reproducing apparatus 2A that can be used for simultaneous reproduction using the medium shown in FIGS. 9 and 10 as the medium other than the concurrent ROM / RAM medium as the multiplex recording medium 2B. .
Unlike the FIG. 14, the main controller 126 of FIG. 15 includes a buffer memory. By temporarily storing a plurality of contents in the buffer memory, the plurality of contents are synchronously reproduced according to the mixing information recorded in the RAM unit, and information input during the synchronous reproduction is set as new mixing information. Is possible. An example of the multiple recording medium applied to FIG. 15 will be described with reference to FIG. It is assumed that the first content is recorded in the area 101 and the second content is recorded in the area 102 in FIG.
Content is read from the multiplex recording medium of FIG. 10 inserted in the multiplex recording / reproducing apparatus, and transmitted to the decoder 203 via the demodulator 205. This reading is performed at a bit rate higher than the bit rate at the time of reproduction. The buffer controller 222 temporarily stores the first and second contents in the buffer memories 220 and 221 in response to reception by the decoder 203.
This is because the buffer memory 220, 221 is used to adjust the time difference associated with reading of a plurality of contents, unlike a concurrent ROM / RAM medium on which data is superimposed and recorded. The contents stored in the buffer memories 220 and 221 are output to the equalizers 206 and 207, respectively, at a bit rate lower than the bit rate at the time of reading, and the subsequent mixing processing is the same as in FIG.
12, 13, and 15, a plurality of contents can be synchronously reproduced in accordance with mixing information recorded in the RAM unit without using a concurrent ROM / RAM as a multiplex recording medium, and information input during synchronous reproduction can be obtained. Can be set as new mixing information.
FIG. 15 shows equalizers 206 and 207 corresponding to the sound quality adjusting means depicted in FIG. 11. In addition, a filter, a compressor limiter that changes the input / output amplitude characteristics according to the amplitude of the input signal, Noise gates, expanders that cut signals below the level, digital delays for delaying the signal, and digital delays for thickening the sound, or digital reverb for reverberation effects (tone processing equipment) It is also possible to replace with.
The multiplex recording / playback apparatus according to the embodiment of the present invention has been described for the purpose of synchronous playback of multiplex recorded content. However, it is also possible to perform normal content playback without multiplex recording.

As described above, according to the present invention, the optimum setting is automatically reproduced only by setting the recording medium on the reproducing apparatus by recording the mixing information when the contents are synchronously reproduced on the medium. . Even if the playback device is changed, since the mixing information is recorded on the medium, there is no need for resetting and it is possible to easily enjoy synchronized playback. In addition, it is possible to change the mixing conditions during synchronous reproduction using the multiplex recording / reproducing apparatus, or to record the changed mixing conditions in the RAM unit as new mixing information.
As a result, the virtual session function and the multiplex recording function, which were limited to some specialists, can be easily and inexpensively realized.

Claims (14)

In a disk-shaped multiple recording medium in which a ROM part in which information is recorded with phase pits using light reflectance and a RAM part that can be recorded and reproduced by light are arranged in layers,
A first region with first content;
A second region with second content;
And a third area having mixing information used when the first and second contents are synchronously synthesized and reproduced. In claim 1,
The first area is formed in the ROM unit,
The second and third regions are formed in the RAM unit,
A multiplex recording medium, wherein the ROM section and the RAM section are superposed. In claim 1,
The first and second regions are formed in the ROM section that can only be read,
The third area is formed in the RAM section that can be additionally written and rewritten,
A multiplex recording medium, wherein the ROM section and the RAM section are superposed. A disk-shaped multiplex in which a ROM part in which information is recorded by phase pits using light reflectance and a RAM part that can be recorded and reproduced by light are arranged at different positions in the radial direction or different positions in the circumferential direction. In the recording medium,
A first area having a first content is formed in the ROM unit;
A second area having a second content and a third area having mixing information used when the first and second contents are synchronously synthesized and reproduced are formed in the RAM unit. A multiplex recording medium characterized by the above. In any one of claims 2 to 4,
The RAM section is formed of a magneto-optical recording film. In any one of claims 1 to 4,
The multiplex recording medium, wherein the mixing information includes output level ratio information of the first and second contents or waveform characteristic information of the first and second contents. In claim 6,
The multiplex recording medium, wherein the mixing information further includes timing information for changing the output level ratio or the waveform characteristic during synchronous reproduction. Light is applied to a multiplex recording medium having a read only ROM portion having a first content recorded by phase pits utilizing light reflectivity and a second content and a rewritable RAM portion having mixing information. An optical pickup that irradiates and detects information in the ROM unit and the RAM unit separately;
A magnetic head for recording information in the RAM unit together with the irradiation light;
A storage device comprising: a controller that generates a reproduction signal by synchronously synthesizing the first and second contents according to the mixing information. In claim 8,
The controller further includes a mixing condition input unit for inputting mixing information,
A storage device, wherein mixing information input during synchronous reproduction of the first and second contents is recorded in the RAM unit. In claim 8,
The controller further includes a mixing condition input unit for inputting mixing information,
A storage device, wherein the reproduction state of the first and second contents is changed according to mixing information input during synchronous reproduction of the first and second contents. In any one of claims 8 to 10,
The storage device, wherein the mixing information includes output level ratio information of the first and second contents or waveform characteristic information of the first and second contents. In claim 11,
The storage device further comprises timing information for changing the output level ratio or the waveform characteristic during synchronous reproduction. In claim 12,
The storage device, wherein the controller changes the first and second output level ratios or waveform characteristics during synchronous reproduction based on the timing information. Light is applied to a multiplex recording medium having a read only ROM portion having a first content recorded by phase pits utilizing light reflectivity and a second content and a rewritable RAM portion having mixing information. An optical pickup that irradiates and detects information of the ROM unit and the RAM unit;
A buffer memory for temporarily storing the first and second contents detected by the optical pickup;
A magnetic head for recording information in the RAM unit together with the irradiation light;
A storage device comprising: a controller that generates a reproduction signal by synchronously synthesizing the first and second contents stored in the buffer memory in accordance with the mixing information.

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