JP2007213810A - Information recording device, information reproducing device, and information recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information reproducing device capable of performing random access reproduction in the middle of a piece of music for each music content not on the basis of the unit of the piece of music but on the basis of the music content, an information recording medium therefor, and an information recording device capable of preparing the information recording medium. <P>SOLUTION: A signal processing means applies prescribed signal processing to externally input recording information to be recorded and outputs the processed recording signal, generates, as content information, respective start positions in the recording information of a plurality of pieces of partial recording information and the kinds of contents on the pieces of partial recording information corresponding to respective start positions, and records them together with the recording information on the information recording medium. Because the content information including the start positions of the pieces of partial recording information for respective kinds of contents in the recording information and the kinds of contents corresponding to the pieces of partial recording information is recorded, only the piece of partial recording information corresponding to the kind of content desired to be reproduced can be reproduced on the basis of the content information during reproduction, independently of the recording order of the entire recording information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information recording apparatus, an information reproducing apparatus, and an information recording medium. More specifically, the present invention relates to an information recording apparatus and information for reproducing recorded information recorded on an information recording medium such as an optical disc regardless of the recording order. The present invention relates to a reproducing apparatus and an information recording medium.

  Today, information recording media for recording recording information such as music are widely used as CD (Compact Disk), audio tape, DAT (Digital Audio Tape) and the like. In addition, the recorded information is further added with a laser disk, a VTR (Video Tape Recorder) tape, a CD-V (CD-Video; a CD on which an image is partially recorded), and a video CD (CD. It is generalized in the same manner as a CD on which an image is recorded as a whole.

  In these information recording media, various reproduction patterns (random access reproduction) are possible regardless of the recording order of the recording information. For example, in the case of a CD, it is possible to reproduce a plurality of songs in reverse order, or to reproduce only a predetermined song repeatedly. Moreover, it is also possible to reproduce based on time information (time code) corresponding to the recording information recorded together with the recording information itself.

  Here, for example, in the conventional CD, in order to enable the above-mentioned random access reproduction, as shown in FIG. 9A, source information (corresponding to recording information) corresponding to the actually reproduced music is stored. Inside the recorded source information area 102 (inner peripheral part of the CD 100), there is provided an access information area 101 in which access information for accessing and reproducing the song is recorded for each song in the recorded information. . In the access information area 101, as shown in FIG. 9B, start addresses 110, 111,..., N corresponding to the start positions of the respective songs in the source information area 102 are recorded.

  When, for example, random playback is performed using the CD 100 shown in FIG. 9, in a playback device such as a CD player, the start address corresponding to the designated song is set in the access information area based on the song designation information input from the outside. The optical pickup is read from 101 and transferred to a position corresponding to the read start address and played. After the reproduction of one song is completed, the optical pickup is transferred to the start address of the next song to be reproduced and reproduced. It will be repeated.

  However, in a conventional information recording medium such as a CD, the address recorded in the access information area 101 is only recorded as the start address for each song in units of one song. In addition, when a song such as an opera is long, for example, the start address is recorded by dividing it into each movement.

On the other hand, in recent years, the use of the above-described information recording medium for karaoke and other purposes has become popular. In this case, only the “climax” portion of a song is repeatedly reproduced. There has been an increasing demand for wanting to play back and continuously playing back only a certain part of a plurality of songs. On the other hand, the conventional CD has a problem that it can be specified only in units of music.
Therefore, the present invention has been made in view of the above-mentioned problems, and the object thereof is not information on a song unit, but information that enables random access reproduction from the middle of a song for each song content based on the song content. An object of the present invention is to provide a reproducing apparatus, an information recording medium, and an information recording apparatus capable of producing the information recording medium.

  In order to solve the above problems, the invention described in claim 1 performs predetermined signal processing on recording information to be recorded to output a processed recording signal, and sets a predetermined content type. The content type for a plurality of partial recording information obtained by dividing the recording information in advance for each time is generated as content information corresponding to the recording information, and an information signal corresponding to the total number of the content information and the partial recording information is generated. A signal processing means for outputting, a multiplexing means for adding the information signal to the processed recording signal and outputting a multiplexed recording signal, and a recording means for recording the multiplexed recording signal on an information recording medium. .

According to the first aspect of the present invention, the signal processing means performs predetermined signal processing on the recording information to be recorded input from the outside and outputs a processed recording signal. Each start position in the record information and the content type of the partial record information corresponding to each start position are generated as content information, and an information signal corresponding to the total number of the content information and the partial record information is output.
The multiplexing means adds the content information signal to the processed recording signal and outputs the multiplexed recording signal.
Thereafter, the recording means records the multiple recording signal on the information recording medium.
Accordingly, since the recording information is recorded together with the content information including the start position of the partial recording information for each content type in the recording information and the content type corresponding to the partial recording information, it is based on the content information at the time of reproduction. Thus, only the partial recording information corresponding to the content type to be reproduced can be reproduced regardless of the recording order of the entire recording information.

  Next, preferred embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the present invention is applied to an information recording apparatus for recording information on an optical disk as an information recording medium, and an information reproducing apparatus for reproducing recorded information from an optical disk on which recording information is recorded by the information recording apparatus. The case where it is applied to will be described.

(I) Information Recording Device First, the configuration of the information recording device according to the embodiment will be described with reference to FIG. As shown in FIG. 1, the information recording apparatus S ₁ according to the embodiment includes a VTR 1 that temporarily records recording information R such as music information and video information to be recorded, and the recording information R for each content type. previously divided into partial record information P _R, previously inputted based on the partial record information P _R cue sheet ST that start time has been described for each in each of the partial record information in R together with the recording information content type corresponding to the P _R a content information, a memory 2 for storing the content information composed of the start time of the partial record information P _R corresponding to the contents type and their contents type described above, the music information and video information outputted from the VTR 1 a / after D conversion, for example, compressed by the MPEG method, and outputs as a compressed multiplexed signal S _R and the time-axis-multiplex the music information and video information, the recording information to be output from the VTR1 Based on the content information signal S _I corresponding to the contents information output from the time code T _T and the memory 2 corresponding to the R, corresponding to the access information D _AC for accessing the record information R for each partial record information P _R a signal processing unit 3 as a signal processing means for outputting the access information signal S _AC to, a hard disk device 4 for temporarily storing the compressed multiplexed signal S _R, a flexible disk for temporarily storing the access information signal S _AC ( and FD) unit 5, performs the information recording apparatus S ₁ overall control, based on the access information signal S _AC read from the compressed multiplexed signal S _R and the FD device 5 is read from the hard disk device 4, the recording information by combining the additional information and the access information D _AC to be recorded together with R generates additional information D _a, outputs the additional information signal S _a corresponding to the additional information D _a Further includes a controller 6 for outputting information selection signal S _C to time-axis-multiplex the compressed multiplexed signal S _R and the additional information signal S _A, based on the information selection signal S _C, the compressed multiplexed signal S _R and the additional information signal _A multiplexer 7 as a multiplexing means for time-division multiplexing _SA and outputting an information-added compressed multiplexed signal _SAP , and an error such as a Reed-Solomon code for the information-added compressed multiplexed signal _SAP A modulator 8 for generating a disk recording signal S _M by applying correction code (ECC) and modulation such as 8-15 modulation, and a master (cutting die) for manufacturing the optical disk with the disk recording signal S _M And a mastering device 9 as recording means for recording on the stamper disk.

Next, the operation of the information recording device S ₁ will be described.
The music information and video information temporarily recorded in the VTR 1 are A / D converted in the signal processing unit 3, then compressed by the MPEG method, and time-axis multiplexed to become the compressed multiplexed signal S _R , and the hard disk device 4. Temporarily stored. In parallel with this, on the basis of the contents information signal S _I that includes the content type and the start time of the partial record information for each P _R stored is input to the memory 2 on the basis of the description of the cue sheet ST, the signal processor 3 , is generated access information D _AC including the start address and the contents type of reference to the time code T _T entered the partial record information for each P _R from VTR 1, the access information signal S corresponding to the access information D _{AC AC} is output and temporarily stored in the FD device 5. A specific example of the content structure of the access information D _AC will be described later. The above processing is executed for the entire recording information R.

When the above processing for all the record information R is completed, the controller 6 reads out the access information signal S _AC from FD unit 5 reads the compressed multiplexed signal S _R from the hard disk device 4, other to be recorded together with the record information R by combining the information and the access information D _AC generates additional information D _a, and outputs the additional information signal S _a corresponding to the additional information D _a. Thereafter, the compressed multiplexed signal S _R is time-axis multiplexed with the additional information signal S _A to generate the information added compressed multiplexed signal _SAP . Then, the information addition and 8-15 modulation such as modulation of added compressed multiplexed signal S error correction code Reed-Solomon code or the like by a modulator 8 with respect to _AP (ECC) is applied, the disk recording modulated by mastering device 9 A signal S _M is recorded on the stamper disc. Then, an optical disc as a commercially available replica disc is manufactured by a replication device (not shown) using this stamper disc.

Next, the operation of the information recording apparatus S ₁ of the access information D _AC and based thereon is generated in the signal processing unit 3, to FIGS. 2 to 6 where recording information R is only music information including a plurality of tracks as an example This will be described more specifically with reference to FIG.

Normally, a music piece is composed of a plurality of choruses as shown in FIG. One chorus can be divided into an intro (prelude), a song, a song (climax), an interlude, and an after (ending). Although the number and order of such divisions differ depending on the music, the content division itself is common to most music. The intro (prelude), songs, song (climactic), interlude or the like corresponds to the content type of the above, Figure 2, the song as the record information R, which is divided into a partial record information P _R based on the content type Show. The cue sheet ST, describes a start time counting from the first track in classification each shown in FIG. 2 (partial record information for each P _R), the memory 2 on the basis thereof, as the content information, and content type start time corresponding thereto is stored for each partial record information P _R. Thereafter, the partial record information and the convenience of explaining the P _R as a "first unit", the unit corresponding to the chorus of FIG. 2 as "second unit".

  In addition, content types shown in FIG. 2 are assigned content codes as shown in FIG. In FIG. 3, “00h” (h is a hexadecimal number) is not defined, but this is because “00h” is not used when the music as recording information is not classified as shown in FIG. It was decided to describe. “06h” to “FFh” are not defined in preparation for the case where the number of content types to be classified in the future increases.

The signal processing unit 3 performs signal processing such as compression processing on the music information input from the VTR 1 for each first unit based on the content information for each first unit stored in the memory 2. Then, based on the start time of the first unit each time included in the generated data amount and the content information signal S _I of the first unit each, calculates the starting address for each first unit, the contents included in the content information signal S _I The corresponding start address is stored together with the type. At this time, a serial number from the beginning of the music information is assigned to each first unit. Next, based on the content information signal S _I from the memory 2, the signal processing unit 3 is composed of a first unit corresponding to any content type in one second unit (in the case of FIG. 2, one chorus). And their order. In this process, for example, in the case of FIG. 2, the second unit corresponding to the chorus 1 is composed of three first units indicating “intro”, “song”, and “song (climax)”, and those Is in the order of “Intro”, “Song”, “Song (Climax)”. Thereafter, for each second unit, the signal processing unit 3 combines the first units constituting the second unit (indicating the type and order of the first units. In the above case, “intro”, “song”, "Song (climax)"). At this time, a serial number from the beginning of the music information is assigned to each second unit as in the first unit.

Then, the signal processing unit 3 performs the above processing for all the songs included in the music information output from the VTR 1, and generates the access information D _AC based on all the data.

Here, an example of the access information D _AC data structure in FIG.
As shown in FIG. 4, the access information D _AC constitute a music data number 20, a song by the second unit number data 21, the first unit number data 22 for each second unit, each of the second unit Configuration first unit number data 23 which is a serial number from the beginning of music information to be recorded in the first unit, start address data 24 of each first unit, and content code data 25 indicating the content type for each first unit. (See FIG. 3). Here, in the first unit number data 22, each second unit is given a serial number from the beginning of music information to be recorded.

The access information D _AC in FIG. 4, for more specific example conforming to the actual music, will be described with reference to FIGS.
Figure 5 illustrates a segmented state in the first unit the music information composed of 2 pieces for each content type (corresponding to partial record information P _R). That is, the first song is composed of two second units, and the first second unit of the first song is composed of three first units of “intro”, “song”, and “song (climax)”. The second second unit of the first song is composed of three first units of “song”, “song (climax)”, and “ending”. Furthermore, the second song is composed of a single second unit, and the second unit is composed of four first units of “intro”, “song”, “song (climax)” and “ending”. ing. These divisions are stored in advance in the memory 2 as content information based on the cue sheet ST, and based on this, access information including the start addresses (“n1”, “n2”... “N10” in FIG. 5) of the respective first units. D _AC is being generated by the signal processing unit 3. The contents of the corresponding access information D _AC to segmented music information as shown in FIG. 5 shown in FIG.

  In FIG. 6, the number-of-music data 20 is “2” because the total number of songs is two. The second unit number data 21 for each song is set to “2” and “1” because the second unit number of the first song is 2 and the second unit number of the second song is 1. The first unit number data 22 is “3”, “3”, and “4” because the first unit numbers constituting each second unit are 3, 3, and 4, respectively. In the configuration first unit number data 23, serial numbers from the beginning of the music information of the first unit constituting each second unit are described. In the start address data 24, the start address (see FIG. 5) for each first unit in the configuration first unit number data 23 is described. In the content code data 25, the content codes shown in FIG. 3 are described in the order of each first unit.

Is output from the access signal S _AC signal processing unit 3 corresponding to the described access information D _AC generated by the process above, once read after being stored in the FD unit 5, synthetic as additional information D _A by the controller 6 And output as an additional information signal S _A. Then, the additional information signal S _A and the compression multiplexed signal S _R by multiplexer 7 are multiplexed, are recorded in the stamper disk mastering device 9 after being modulated such as an information added compressed multiplexed signal S _AP, replica disk based on this As an optical disc.

The information about the selection signal S _C timing for time-axis-multiplex the compressed multiplexed signal S _R and the additional information signal S _A by multiplexer 7 by, may be set in advance in the additional information signal S _A side contacts multiplexer 7 after recording the information signal S _a, be switched to the contact a compressed multiplexed signal S _R side, it is possible to time-axis-multiplex the additional information signal S _a to the innermost circumference of the optical disc (stamper disc) . In this case, since the additional information signal S _A is recorded collectively in one area, at the time of reproduction, it is possible to quickly search the partial record information P _R corresponding to the first unit to be reproduced During reproduction, the additional information signal S _A and the compressed multiplexed signal S _R can be prevented from being confused and reproduced.

According to the optical disc-described music information by the information recording apparatus S ₁ and the information recording apparatus S ₁ is recorded above, the music information, "introduction", "interlude" first unit for each content type, such as in the music information Since the content information including the start address and the content type corresponding to each first unit is recorded, it corresponds to the content type to be reproduced regardless of the recording order of the entire music information based on the content information at the time of reproduction Only the first unit portion to be played can be reproduced.

(II) Information Reproducing Device First, the configuration of the information reproducing device according to the embodiment will be described with reference to FIG. As shown in FIG. 7, in the information reproducing apparatus S ₂ according to the embodiment, the above-described information recording apparatus S ₁ multiplexes the compressed multiplexed signal S _R with the additional information signal S _A including the access information signal S _AC to record the disc. signal S optical disc DK which is recorded to detect the disk record signal S _M from the _M, the optical pickup 10 as a detecting means for outputting a detection signal S _P, the read detection signal S _P certain threshold ( a binarizing unit 11 by the threshold) and outputs a binary signal S _B by binarizing performs demodulation and error correction on the binary signal S _B, and outputs as a demodulated signal S _L, the binary signal S The demodulator 12 as an extracting means for extracting the additional information signal S _A from _B, and the demodulated signal S _L are expanded by the MPEG method, D / A converted, and output video signal S _DV and output music signal S _DA A signal processing unit 13 and output as, from the binary signal S _B detects a clock component, the reference clock from the detection clock signal CLK and the clock component detector 14 to output as _P, the detection clock signal CLK _P and later of the oscillator 17 a signal CLK and a comparison signal to the phase comparator, removes high-frequency components from the comparison signal, a phase comparator 15 containing an LPF (Low Pass Filter) for outputting a speed control signal S _SP of the spindle motor 16, under the rotation speed control based on the speed control signal S _SP, a spindle motor 16 for rotating the optical disc DK, and outputs the reference clock signal CLK for timing synchronization between the members together and constituting the information reproducing apparatus S ₂ an oscillator 17, performs the information reproducing apparatus S ₂ overall control, stores access information D _AC included in the extracted additional information signal S _a The designation signal S _{F based} on the designation signal SF that designates the type of content to be reproduced inputted from the keyboard 18 and the address signal S _AD corresponding to the address of the recording information that is currently reproduced outputted from the demodulator 12. Control means for outputting a spindle control signal S _E , a signal output control signal S _DS and a slider control signal S _X for reproducing only the partial recording information P _R (first unit) corresponding to the content type designated by _F Controller 19.

Here, the output of the output video signal S _DV and output music signals S _DA by the signal processing unit 13 based on the control signal output control signal S _DS, reproduces the portion to be reproduced recorded information P _R (first unit) Therefore, while the optical pickup 10 is transferred by the slider control signal S _X to the position where the partial recording information P _R (first unit) is recorded, the output video signal _SDV is the image immediately before the transfer. The output of the output music signal _SDA is output as a still image and is interrupted.

Further, in the recording by the information recording apparatus S ₁ , since the disk recording signal _SM is modulated so that the clock can be self-extracted at the time of reproduction, the clock component detector 14 detects the extracted clock signal CLK _P. Can be detected.

Next, the operation of the information reproducing apparatus S ₂ with reference to FIGS. 7 and 8, only the music information corresponding to the access information D _AC in FIG. 6 will be described when it is recorded on the optical disc DK. In this case, it is needless to say that the output video signal S _DV is not outputted, even when the output video signal S _DV is multiplexed together with the music information, by an analogous operation, embodiment the same effect as shown below Can be raised. In the following embodiment, a case where only the “climax” portion (corresponding to the content code “03h”) in the music corresponding to the music information is reproduced will be described.

The operation of the information reproducing apparatus S ₂ is performed based on a flowchart (see FIG. 8) stored in a ROM (Read Only Memory) included in the controller 19. In the information reproducing apparatus S ₂ shown in FIG. 7, when music information is reproduced only for a specific content type in the music information, first, a content code “03h” corresponding to “climax” to be reproduced by the keyboard 18 is set. Input (step S1). Then, when the content code “03h” is input (step S1), the controller 19 sets the first corresponding to the content code “03h” from the content code data 25 of the stored address information D _AC (see FIG. 6). The unit numbers “(3)”, “(5)”, and “(9)” are acquired (step S2). If the first unit number has been acquired (step S2), then the start address of the first unit of the number and the start address of the first unit next to the first unit of the number are acquired from the disclosed address data 24 ( Step S3). Specifically, the start address of the first unit (3) is “n3”, and the start address of the first unit (4), which is the first unit next to the first unit (3), is “n4”. .

  In step S4, "n3" is subtracted from "n4" to calculate the size (n4-n3) of the first unit (3) (step S4). Thereafter, the start address “n3” of the first unit (3) acquired in step S3 and the size (n4-n3) of the first unit (3) calculated in step S4 are stored in the memory in the controller 19 (step S5).

  Next, whether or not Steps S3 to S5 have been executed for the first unit (first unit (3), first unit (5) and first unit (9)) corresponding to all the content codes “03h”. Is determined (step S6). In the processing so far, since the processing has been completed only for the first unit (3), Step S6 is “NO”, and the process returns to Step S3 to perform Steps S3 to S5 for the next first unit (5). The process is executed. In this way, Steps S3 to S5 are executed for the first unit (3), the first unit (5), and the first unit (9).

If Step S3 to Step S5 are executed for the first unit (3), the first unit (5), and the first unit (9) (Step S6; YES), then the first unit (3) A slider control signal S _X as a control signal is output to move the optical pickup 10 to the position of the start address “n3”. At this time, the output of the output audio signal S _DA by a signal output control signal S _DS is stopped. Then, when the optical pickup 10 is transferred to the position of the start address “n3”, the size (n4−n3) of the first unit (3) is reproduced from that position (step S7). At this time, needless to say, the output of the output audio signal _SDA is restarted simultaneously with the start of reproduction.

  When the first unit (3) is reproduced by the size (n4-n3) (step S7), then the first unit (first unit (3), first unit corresponding to all the content codes “03h”). It is determined whether or not step S7 has been executed for the unit (5) and the first unit (9) (step S8). In the process so far, since the process of step S7 is completed only for the first unit (3), step S8 is “NO”, and the process returns to step S7, and step S7 is performed for the next first unit (5). The process is executed. In this way, step S7 is executed for the first unit (3), the first unit (5), and the first unit (9), and the first unit corresponding to the content type “climax” is reproduced. When the reproduction of the first unit corresponding to all “climax” is completed (step S8; YES), the reproduction process for each content type is terminated and the next command is waited for.

Above is the processing of the information reproducing apparatus S _2, according to this, based on the access information D _AC including the content type corresponding to the start address and the first unit of the first unit for each content type of the music information Music information is played back, so it is possible to play a variety of playbacks such as continuous playback of only the climax part of each song and continuous playback of only the intro part of each song, especially when the embodiment is applied to a karaoke device. Will expand the range of use.

(III) Modifications In the above-described embodiments, the case where one song is divided into first units such as “prelude”, “climax”, “interlude”, etc. has been described, but the present invention is limited to this. Instead, by changing the method of dividing into the first unit, repeat playback in chorus (song) units, continuous playback of specific songs only, repeat playback in content type units, and the like are possible.

Further, not only music information but also video information can be divided and recorded for each content type as described above, and can be configured to be reproduced for each content type.
Furthermore, the present invention can be applied to recording on a CD-ROM (Compact Disk-Read Only Memory) for a computer. In that case, the content type is classified and recorded for each type of recorded data.

Furthermore, when recording the record information R of the optical disc DK is the additional information signal S _A to the access information D _AC is multiplexed may be recorded in units of files or music units.
Further, the keyboard 18 may be a remote control capable of remote operation.

It is a figure which shows the outline | summary structure block of the information recording device which concerns on an Example. It is a figure which shows the division of recording information (music) according to the content kind of an Example. It is a figure which shows an example of coding of the content type of an Example. It is a figure which shows the data structure of the address information of an Example. It is a figure which shows the specific example of the division of the music by the content type of an Example. It is a figure which shows the specific example of access information. It is a block diagram which shows schematic structure of the information reproduction apparatus of an Example. It is a flowchart which shows operation | movement of the information reproduction apparatus of an Example. It is a figure explaining the information recording of a prior art.

Explanation of symbols

1 ... VTR
DESCRIPTION OF SYMBOLS 2 ... Memory 3, 13 ... Signal processing part 4 ... Hard disk apparatus 5 ... FD apparatus 6, 19 ... Controller 7 ... Multiplexer 8 ... Modulator 9 ... Mastering apparatus 10 ... Optical pick-up 11 ... Binarizer 12 ... Demodulator 14 ... Clock component detector 15 ... Phase comparator (LPF)
DESCRIPTION OF SYMBOLS 16 ... Spindle motor 17 ... Oscillator 18 ... Keyboard 20 ... Music number data 21 ... 2nd unit number data according to music 22 ... 1st unit number data 23 ... Composition 1st unit number data 24 ... Start address data 25 ... Content code data 100 ... CD
101 ... access information area 102 ... source information region 110 and 111, N ... start address D _AC ... access information S ₁ ... information recording apparatus S ₂ ... Information reproducing apparatus DK ... optical ST ... cue sheet S _R ... compressed multiplexed signal S _I ... Content information signal S _AC ... Access information signal S _A ... Additional information signal S _C ... Information selection signal S _M ... Disc recording signal S _AP ... Information added compression multiplexed signal S _SP ... Speed control signal S _P ... Detection signal S _B ... Binary signal S _X ... Slider control signal S _E ... Spindle control signal S _F ... Designation signal S _AD ... Address signal S _DS ... Signal output control signal S _L ... Demodulation signal S _DV ... Output video signal S _DA ... Output music signal T _T ... time code CLK ... reference clock signal CLK _P ... detection clock signal R ... record information P _R ... partial record information

Claims (1)

The content type for a plurality of partial recording information obtained by performing predetermined signal processing on the recording information to be recorded and outputting a processed recording signal, and dividing the recording information in advance for each predetermined content type Is generated as content information corresponding to the recording information, and signal processing means for outputting information signals corresponding to the content information and the total number of the partial recording information, and adding the information signal to the processed recording signal, An information recording apparatus comprising: multiplexing means for outputting a multiplexed recording signal; and recording means for recording the multiplexed recording signal on an information recording medium.

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