JP3388260B2 - Information signal reproducing method, information signal recording method, information signal recording / reproducing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to first and second information based on video information such as two movies and audio information such as two music.
Information signal reproducing method, information signal recording method, and information signal recording method for recording and / or reproducing the information signal of (1) on a disk-shaped recording medium such as optical or magnetic in time division by one pickup (or head) via a buffer memory. It relates to a reproduction method.

[0002]

2. Description of the Related Art Conventionally, an optical disk device (for example, a DVD player) to which an optical disk is applied as an information signal recording medium.
For example, an information signal such as video information such as a movie or audio information such as music is compressed and recorded on an optical disc by an optical pickup, and a compressed information signal read from the optical pickup by the optical pickup at the time of reproduction is expanded. A device to which this type of compression / expansion technology is applied has, for example, a buffer memory of about 4 Mbits inside the device, and a signal of a transfer rate of 10.08 Mbps read from an optical disc is transferred from the 10.08 Mbps to the device. The buffer memory absorbs the difference in transfer rate when converting to a transfer rate of a signal having a low variable transfer rate.

Further, in Japanese Unexamined Patent Publication No. 10-92158, when recording data of a plurality of stories and scenes on a recording medium, the physical movement distance of the pickup at the time of reproduction is short and the reproduction device is interrupted. A technical idea is disclosed which enables suppression of occurrence of disturbance. Here, it is also considered to record, for example, a multi-angle scene in which the same event that progresses at the same time is photographed from a plurality of angles on an optical disc. In order to realize the function of this multi-angle scene, the pickup on the disc is performed. The buffer memory absorbs the time during which data cannot be played while moving the position. At this time, when one desired angle is selected from several types of angles from the optical disc, the signal of one angle intermittently recorded on the optical disc is selectively reproduced while jumping the pickup, The relationship between the seek time of the pickup and the buffer memory capacity necessary for absorbing the continuity of signals in the buffer memory is disclosed.

The applicant of the present invention has also filed Japanese Patent Application Laid-Open No. 6-13969.
Japanese Patent Laid-Open No. 6-1994 proposes recording and reproducing two or more signals from one disk by absorbing a difference in transfer rate in a buffer memory. That is, in the recording / reproducing apparatus disclosed in Japanese Patent Application Laid-Open No. 6-139696, digital data having a first transfer rate generated by compressing the information amount of a recording signal to be recorded / reproduced is modulated in a predetermined manner. A recording operation in which the data is modulated according to the method and is converted into digital data for recording / reproduction having a second transfer rate higher than the first transfer rate and is written in the recording medium, and the recording operation is performed. A reproduction operation of recovering the recording / reproducing digital data into digital data having a first transfer rate and then converting the reproduction data into a reproduction signal and outputting the reproduction signal is reproduced from the recording medium. This is performed in a time division manner such that the information signal and the information signal are simultaneous signals.

[0005]

By the way, in the recording / reproducing apparatus disclosed in Japanese Patent Laid-Open No. 6-139696, the compression ratio of one digital audio signal is 1/5.
In this case, the recording / reproducing operation can be satisfactorily performed without any play time. In recent years, however, the information signal recording medium such as an optical disc has a high density, a large capacity, and is digitalized. Accordingly, it is required to record two information signals in different areas of the information signal recording medium and alternately record and / or reproduce the two information signals by one optical pickup head on the information signal recording medium. The present invention is an improvement over the prior art in order to meet the above requirements.

[0006]

The present invention has been made in view of the above problems, and provides an information signal reproducing apparatus, an information signal recording apparatus, and an information signal recording / reproducing apparatus having the following configurations. (1) Rotating an information signal recording medium having first and second information signals recorded at first and second positions, respectively, and time division from the first and second positions on the information signal recording medium. And temporarily storing the reproduced first and second information signals in a buffer memory and outputting the first and second information signals at the first and second transfer rates, respectively. The first and second information signals reproduced by time division from the first and second positions on the information signal recording medium are reproduced from one head at a constant transfer rate faster than the first and second transfer rates. Transfer in time division to the buffer memory, transfer rates of the first and second information signals transferred from the head to the buffer memory ... Rp, transfer of outputting the first information signal from the buffer memory Rate ... Ra, the second A transfer rate for outputting an information signal from the buffer memory ... Rb, an information unit amount for transferring the first information signal from the head to the buffer memory ... Ya, a second information signal from the head to the buffer memory Information unit amount to be transferred ... Yb, time required for the head to move from the first position to the second position on the information signal recording medium ... Tab, from the second position on the information signal recording medium for the head The time required to move to the first position is Tba, where (Ya + Yb) ≧ Rp × (Ra + Rb) × (Tab + Tba) / (Rp−Ra−Rb) Ya ≧ Rp × Ra × (Tab + Tba) / (Rp−Ra−Rb) ) Yb ≧ Rp × Rb × (Tab + Tba) / (Rp−Ra−Rb) is satisfied and the first and second information signals are reproduced from the information signal recording medium. Information signal reproducing method characterized by comprising a step. (2) The step of rotating the information signal recording medium for recording the first and second information signals, and the first and second information signals respectively input at the first and second transfer rates are temporarily Storing in a buffer memory, and the first and second read out from the buffer memory in a time division manner
Recording the information signal of 1) at a constant transfer rate higher than the first and second transfer rates from one head to the first and second positions on the information signal recording medium in a time division manner,
Transfer rate of first and second information signals transferred to the head from the buffer memory ... Rp, transfer rate of inputting the first information signal to the buffer memory ... Ra, and the second information signal to the buffer Transfer rate input to the memory ... Rb, Information unit amount for transferring the first information signal to the head from the buffer memory ... Ya, Information unit amount for transferring the second information signal to the head from the buffer memory ... Yb, time required for the head to move from the first position to the second position on the information signal recording medium ... Tab, the head moves from the second position to the first position on the information signal recording medium Time required for movement ... Tba, (Ya + Yb) ≧ Rp × (Ra + Rb) × (Tab + Tba) / (Rp−Ra−Rb) Ya ≧ Rp × Ra × (Tab + Tba) / (Rp-Ra-Rb) Yb ≧ Rp × Rb × (Tab + Tba) / (Rp-Ra-Rb) Satisfying the relational expression, recording the first and second information signals on the information signal recording medium An information signal recording method comprising: (3) Rotating an information signal recording medium for recording / reproducing for recording either one of the first and second information signals and reproducing the other, and from the first position on the information signal recording medium. One information signal reproduced by one head is temporarily stored in a buffer memory and is output at a first transfer rate, while the other information signal input at a second transfer rate is temporarily buffered. Storing in a memory, and transferring one information signal reproduced from a first position on the information signal recording medium to the buffer memory at a constant transfer rate higher than the first and second transfer rates. Recording the other information signal input to the buffer memory at the second position on the information signal recording medium at the constant transfer rate by the head in a time-division manner. Step a, first input and output for the buffer memory by the head, the transfer rate ... Rp of the second information signal, said first, serial of the second information signal
A transfer rate for inputting the information signal to be recorded into the buffer memory Ra, reproduction of the first and second information signals
Rb which outputs one of the information signals from the buffer memory, Rb which transfers the information signal to be recorded to the head from the buffer memory, Ya, and the information signal which is to be reproduced from the head. Information unit amount transferred to the buffer memory ... Yb, time required for the head to move from the first position to the second position on the information signal recording medium ... Tab, the head moves to the second position on the information signal recording medium. The time required to move from the position 2 to the first position is Tba, and (Ya + Yb) ≧ Rp × (Ra + Rb) × (Tab + Tba) / (Rp−Ra−Rb) Ya ≧ Rp × Ra × (Tab + Tba) / (Rp −Ra−Rb) Yb ≧ Rp × Rb × (Tab + Tba) / (Rp−Ra−Rb), the information signal recording medium is provided with the first and second information signals.
And a step of recording / reproducing a second information signal.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An information signal reproducing apparatus, an information signal recording apparatus, an information signal recording / reproducing apparatus, an information signal communication apparatus and an information signal reproducing medium relating to the present invention will be described below with reference to FIGS. A detailed description will be given in the order of <first embodiment> and <second embodiment> with reference.

<First Embodiment> FIG. 1 shows information signal recording and / or
Or, it is a block diagram for explaining the overall configuration of the reproducing apparatus.

As shown in FIG. 1, in the information signal recording and / or reproducing apparatus 10A, DVD-ROM, DVD-RAM, DVD-RW, DV are used as recording and / or reproducing media.
The present invention can be applied to an optical disk such as D + RW and a magnetic disk such as a hard disk and a floppy (registered trademark) disk. In the following embodiments, an optical disk will be described as a medium.

As shown in FIG. 1, in an information signal recording and / or reproducing apparatus (optical disk player) 10, an optical disk (information signal recording medium) 13 is rotatably mounted on a turntable 12 attached to a shaft of a spindle motor 11. It is provided.

An optical head (hereinafter referred to as an optical pickup) 14 is provided so as to face the optical disc 13 and is movable in the radial direction of the optical disc 13. The optical pickup 14 is capable of performing reproduction on the reproduction-only optical disc 13 and recording / reproduction on the recording / reproduction optical disc 13, and a semiconductor laser provided inside although not shown. Is used as a light source, and a laser spot is irradiated onto the optical disk 13 by a collimator lens, an objective lens, or the like. At this time, the semiconductor laser is driven by the laser drive circuit, but when recording an information signal such as an audio signal or a video signal, the input information signal is waveform-corrected by the waveform correction circuit and then input to the laser drive circuit. It

The system controller 2 issues an instruction to start recording and / or reproduction by selecting a plurality of keys 23.
2 determines and issues a command to the signal processing circuit 18 and the servo circuit 17, and the signal read from the optical pick pick 14 generates a reproduction signal and a servo signal by the preamplifier 16, and the optical pickup 14 causes the servo circuit 17 to perform the servo control. By processing the signal, a focusing and tracking signal is generated for the track on the optical disc 13, and the driver circuit 15 drives an actuator in the optical pickup 14 to perform a round of servo control of the optical pickup 14. Based on the control data on the optical disc 13, the optical pickup 14 is moved in the radial direction of the optical disc 13 by the feed motor so as to reproduce the sector of the target track on the optical disc 13.

The reproduction signal read from the optical pickup 14 with one correction block as the minimum unit optimizes the frequency characteristics of the reproduction signal by the preamplifier 16 by the equalizer, applies the PLL, and the bit clock of the PLL. The system controller 22 A / D-converts and measures the jitter value generated from the comparison of the time axis of the data, and changes the waveform correction circuit at the time of recording according to this value.

Further, the signal processing circuit 18 converts the signal into a digital signal, for example, performs synchronization detection, and the optical disc 1
From the EFM + signal on 3, the NRZI data is decoded and error correction processing is performed in correction block units to obtain a sector address signal and first and second information signals described later. Since these first and second information signals are signals compressed at a variable transfer rate, one correction block is minimized in the track buffer memory 19 using a 64 Mbit DRAM as a temporary storage means. Is temporarily stored as a unit, and the variable transfer rates of the first and second information signals are absorbed on the time axis. Track / buffer memory 19
The signal read from the audio / video / encoder / decoder (hereinafter referred to as AV-ENDEC) 20
An audio signal and a video signal are decompressed and separated from the first and second information signals compressed based on MPEG2 by a decoder therein, and these audio signals and video signals are respectively separated by D / A converters not shown. It outputs as audio and video signals.

In the AV-ENDEC 20, the control data written on the optical disk 13 determines the decompression speed in accordance with the recording mode to be described later, and the decompression is performed in accordance therewith, and the buffer memory 21 is connected. There is.

Further, the speed signal of the optical disk 13 generated by the PLL of the preamplifier 16 is sent to the servo circuit 17, and the rotation signal of the optical disk 13 is controlled by CLV by this speed signal. Further, the rotation position signal of the Hall element of the spindle motor 11 is fed back to the servo circuit 17, and the speed signal generated from this signal also has a constant rotation FG control. The system controller 22 controls the entire LSI.

Further, in order to set the resolution of the image to be recorded, a scene such as a car race having a high speed, or to set the recording time with priority, key input or external control data is sent from the microcomputer in the system controller 22. Has a switching terminal, so that the recording time can be changed and the setting can be selected by an external user.

As will be described later, the user can reproduce the video signal recorded on the optical disk 13,
In addition to recording the video signal, the video signal of a different area on the optical disk 13 can be reproduced while the video signal currently being recorded is being recorded as it is. Further, it is configured such that the video signals of different areas on the optical disk 13 can be recorded while the video signals currently being reproduced are being reproduced as they are. Further, similarly, it is configured such that the video signal or the like in a different area of the optical disc 13 can be reproduced while the video signal currently being reproduced is being reproduced as it is. Similarly, the video signals of different areas on the optical disk 13 can be recorded while the video signals currently being recorded are being recorded as they are. This allows the user to enjoy functions such as post-record recording and back program recording.

Here, in the information signal recording and / or reproducing apparatus 10A, two different areas are recorded on the optical disk 13.
In the case of recording and / or reproducing the first and second information signals by the video information of one movie or the like and the audio information of two music by the one optical pickup 14 via the track / buffer memory 19 in a time division manner. Will be described with reference to FIG. Incidentally, it is of course possible to record and / or reproduce only one of the first and second information signals via the track / buffer memory 19 by one optical pickup 14, but the explanation in this case will be omitted. Omit it.

FIG. 2 shows the first and second areas between the first and second areas on the optical disk and the first and second areas on the track buffer memory in the information signal recording and / or reproducing apparatus. It is the figure which showed typically the state which records and / or reproduces two information signals by one optical pickup in time division. Note that, in FIG. 2, the preamplifier and the signal processing circuit are not shown for the sake of clarity.

As shown in FIG. 2, the first area 13a on the optical disk 13 is an area for recording the first information signal A having the recording capacity Ya as the minimum unit for recording and reproduction (for example, the address A1 area in FIG. 4). In the second area 13b, the recording capacity Yb is set as the minimum unit for recording and reproducing (for example, address B in FIG. 4).
It is assumed that this is an area for recording the second information signal B, which is one area). At this time, the first information signal A and the second information signal B may be information related to each other or information not related at all.

The first area 19a on the track / buffer memory 19 is an area for temporarily storing the first information signal A, and the second area 19b is for temporarily storing the second information signal B. It is assumed to be a storage area.

Further, one optical pickup 14 has a first
Information signal A and second information signal B are transferred in a time division manner between the optical disk 13 and the track buffer memory 19, and the first and second optical pickups 14 are used.
The transfer rate Rp to the second information signals A and B is set constant, and this constant transfer rate Rp is, for example, 25M.
Assume that it is bps. The transfer rate Rp of the above-mentioned one optical pickup 14 to the first and second information signals A and B is set to a value faster than the transfer rates Ra and Rb of the first and second information signals A and B described later. It is set.

The track buffer memory 19 and A
The first and second information signals A, V-ENDEC20,
B is transferred. At this time, the transfer rate of the first information signal A is the transfer rate Ra, and the transfer rate of the second information signal B is the transfer rate Rb. The present invention is characterized in that the first information signal A and the second information signal B can be continuously and simultaneously recorded and / or reproduced as described later.

Here, the transfer rates Ra and Rb of the first and second information signals A and B can be selected by giving priority to the image quality. For example, 8 Mbps and 4 Mbp shown below are shown.
The transfer rate is either s or 2 Mbps.
． At a transfer rate for high image quality, for example, a mode with a recording time of 2 hours of 8 Mbps ,. A mode with a recording time of 4 hours at a transfer rate of, for example, 4 Mbps for a slightly high image quality ,. Three types of modes, that is, a transfer rate for normal image quality and a recording time of 8 hours at 2 Mbps, are prepared.
At the time of recording on the recording medium, the transfer rate R of the first and second information signals A and B can be set by designating the mode by the key input by the user.
While a and Rb are set, the compression rate at the time of recording is read from the control data of the first and second information signals A and B in the reproduction signal at the time of reproduction from the optical disc 13, and the first and first compression rates are read according to these values. It is assumed that the transfer rates Ra and Rb of the two information signals A and B are set.

The system controller 22 shown in FIG. 1 has a 64-Mbit track buffer memory 19
In the first and second areas 19a and 19b, the values of the transfer rates Ra and Rb of the first and second information signals A and B (= Ra: R
In addition to division setting according to b), each area 19a, 19
In b, an EMPTY value indicating that the storage capacity is empty and a FULL value indicating that the storage capacity is full are set according to the transfer rates Ra and Rb of the first and second information signals A and B. To do. Then, the system controller 22 constantly monitors the storage remaining amount between the EMPTY value and the FULL value in each area 19a, 19b in the track buffer memory 19.

As a different embodiment, as described above, the first and second areas 19a, 19a in the track / buffer memory 19 are set in accordance with the values of the transfer rates Ra, Rb of the first and second information signals A, B. 19b is not divided, but divided according to the recording mode or the reproduction mode. For example, 2
Assuming that the two information signals A and B have the same transfer rate,
One information signal A (B) is reproduced and the other information signal B is reproduced.
When recording (A), the reproduction signal does not cause a big problem even if the continuity of reproduction is impaired during reproduction, but if the recording signal cannot be recorded continuously, it becomes a fatal defect. For example, the recording is made to occupy a large area in the track buffer memory 19. This processing is performed at the time when the system controller 22 inputs a recording or reproduction instruction, and at the same time as described above, when the data in the track buffer memory 19 is confirmed and it is confirmed that there is no intermediate data during reproduction or recording. Done in.

Next, the first and second areas 19a and 19b in the track buffer memory 19 are transferred to the transfer rates Ra and R.
An information signal reproducing apparatus to which a mode of reproducing the first and second information signals A and B from the optical disc 13 under the condition that the division is set according to the value of b, and the first and second information signals A and B
And an information signal recording device to which a form of recording the information on the optical disc 13 is applied, and one of the first and second information signals A and B is reproduced from the optical disc 13 and the other is reproduced
The information signal recording / reproducing apparatus to which the recording mode is applied will be sequentially described with reference to FIGS. 3 to 12.

<Information Signal Reproducing Device> FIG. 3 is a diagram schematically showing an information signal reproducing device to which the first and second information signals are reproduced from the optical disc, and FIG. 4 shows the first and second information signals on the optical disc. FIG. 5 is a diagram showing addresses of the second area, FIG. 5 is a flowchart showing a state in which the first and second information signals are reproduced from the optical disc, and FIG. 6 is a state in which the first and second information signals are reproduced from the optical disc. 3 is a timing chart showing the above.

As shown in FIG. 3, the optical disk 13 is formed for reproduction only, and the first information signal A having the recording capacity Ya is formed on the optical disk 13 in the first area 13a.
And the second information signal B having a recording capacity Yb is previously recorded in the second area 13b.

Moreover, as shown in FIG.
The upper first area 13a is divided into a plurality of areas within a range in which a seek time described later can be protected, and addresses A1, A2, A3, ...
Are recorded separately. Similarly, the second area 13b on the optical disk 13 is also divided into a plurality of areas within a range where a seek time described later can be protected, and addresses B1, B2, B3, ... Each is recorded separately. At this time, between the first address area A1 in the first area 13a to be reproduced first and the first address area B1 in the second area 13b to be reproduced next, the optical pickup 14 is, for example, 1. The seek time of the optical pickup 14 that moves between the first information signal A and the second information signal B to be reproduced next is set as a whole within a range that allows movement within 5 seconds. Maximum is within 1.5 seconds.

During reproduction of the optical disk 13, the optical pickup 14 moves to a predetermined reproduction track, waits for the start sector, and the first and second recorded signals in the reproduction signal are recorded.
The compression rate at the time of recording is read from the control data of the information signals A and B of the signal processing circuit 1 according to this value.
8 (FIG. 1), the storage capacity areas of the first area 19a and the second area 19b in the 64 Mb track buffer memory 19 are separated, and the EMPTY value and the FULL value of each area 19a, 19b are separated. Are set respectively.

Here, the optical pickup 14 outputs the first information signal A recorded in the first area 13a on the optical disk 13 and the second information signal B recorded in the second area 13b. The first information signal A obtained by reproduction is reproduced in a time-division manner alternately, and the second information signal B obtained by reproduction is reproduced in the first area 19a in the track buffer memory 19. In the second area 19b in the memory 19, a fixed transfer rate Rp (for example, 25 Mb) is time-divided.
ps) alternately and temporarily store. At this time, the transfer rates of the optical pickup 14 to the first and second information signals A and B are the same as those when the first and second information signals A and B temporarily stored in the track buffer memory 19 are output. It is set faster than the first and second transfer rates.

On the other hand, the track / buffer memory 19 is
The transfer rate R of the first and second information signals A and B based on the recording compression rate read from the control data
a and Rb are set, and the first and second information signals A and B are transferred to the AV-ENDEC 20 side at the transfer rates Ra and Rb. After that, the decoder in the AV-ENDEC 20 expands the first and second information signals A and B based on their respective compression rates, and reproduces both information signals A and B at the same time by a display (not shown) or a speaker. There is.

Here, the operation of the information signal reproducing apparatus will be described with reference to FIGS. In addition, in FIG.
The transfer rates Ra and Rb of the second information signals A and B are illustrated as the same transfer rate for convenience of illustration, but the same tendency is exhibited even when the two are different.

First, in step S31, the flow of reproduction is started.

Next, in step S32, the first position where the optical pickup 14 is to be reproduced on the optical disc 13
It is confirmed whether the first address area A1 (target position) in the area 13a has been reached. If the address area A1 (target position) is not reached, this step S
32 is further continued, and when the address area A1 (target position) is reached, the process proceeds to the next step S33.

Next, in step S33, the optical pickup 14 sets the first address area A in the first area 13a.
The reproduction is started from 1 and the first information signal A is transferred at the transfer rate R
The first area 19 in the track buffer memory 19 at p
It is temporarily stored in a. At this time, the system controller 22 (FIG. 1) constantly monitors the EMPTY value and the FULL value of the first area 19a in the track / buffer memory 19, and the first information signal only in the first first cycle. The transfer rate Rp is stored until A reaches the EMPTY value.

Next, in step S34, the first area 19a stored in the first area 19a in the track buffer memory 19 is stored.
Asks whether the information signal A of E has reached the EMPTY value, and E
When the MPTY value is not reached, the operation of step S33 is continued, and when the EMPTY value is reached, the process proceeds to the next step S35.

Next, in step S35, when the first information signal A exceeds the EMPTY value, the first information signal A is read out to the AV-ENDEC 20 side at the transfer rate Ra, so as shown in FIG. Between the value and the FULL value, the first information signal A is the track buffer memory 1
Transfer rate Rp written in the first area 19a
And the first information signal A is transmitted from the first area 19a to AV-E.
The first information signal A is increased while increasing with the slope of the difference (Rp-Ra) of the transfer rate Ra read to the NDEC 20 side.
Is temporarily stored in the first area 19a.

Next, in step S36, it is inquired whether or not the first information signal A stored in the first area 19a in the track buffer memory 19 has reached the FULL value.
If it has not reached the UL value, the process returns to step S35, and if it has reached the FULL value, the process proceeds to the next step S37.

Next, in step S37, the first information signal A stored in the first area 19a in the track buffer memory 19 reaches the FULL value, so that the optical pickup 14 sets the first information signal on the optical disk 13 to the first value. 1 in area 13a
The reproduction in the th address area A1 is stopped. here,
From the stage where the reproduction of the first information signal A is stopped, the first information signal A stored in the first area 19a in the track buffer memory 19 is continuously read at the transfer rate Ra to the AV-ENDEC 20 side. However, as is clear from FIG. 6, in this read operation, the period until the EMPTY value is reached is the second address area A2 in the first area 13a.
It suffices to end the playback before starting playback.

Next, in step S38, the second area 1 on the optical disk 13 to be reproduced next by the optical pickup 14 is reproduced.
Move to the first address area B1 in 3b. At this time, the seek time Tab during which the optical pickup 14 moves from the first address area A1 in the first area 13a on the optical disk 13 to the first address area B1 in the second area 13b is 1.5 at maximum. Within seconds.

Next, in step S39, it is confirmed whether or not the optical pickup 14 has reached the address area B1 (target position) of the second area 13b on the optical disk 13. If the address area B1 (target position) is not reached, step S39 is further continued, and the address area B1
When it reaches 1 (target position), the process proceeds to the next step S40.

Next, in step S40, the optical pickup 14 starts reproduction from the first address area B1 in the second area 13b on the optical disk 13 to track the second information signal B at the transfer rate Rp. Buffer memory 19
It is temporarily stored in the second area 19b therein. On this occasion,
The second information signal B is EMP only in the first first cycle.
It is stored at the transfer rate Rp up to the TY value.

Next, in step S41, the second area stored in the second area 19b of the track buffer memory 19 is stored.
Asks whether the information signal B of E has reached the EMPTY value, and E
When the MPTY value is not reached, the operation of step S40 is continued, and when the EMPTY value is reached, the process proceeds to the next step S42.

Next, in step S42, when the second information signal B exceeds the EMPTY value, the second information signal B is read out to the AV-ENDEC 20 side at the transfer rate Rb, so as shown in FIG. Between the value and the FULL value, the second information signal B is the track buffer memory 1
Transfer rate Rp written in the second area 19b
And the second information signal B is transmitted from the second area 19b to AV-E.
The second information signal B increases while increasing with the gradient of the difference (Rp-Rb) of the transfer rate Rb read to the NDEC 20 side.
Is temporarily stored in the second area 19b.

Next, in step S43, it is inquired whether or not the second information signal B stored in the second area 19b in the track buffer memory 19 has reached the FULL value.
If it has not reached the UL value, the process returns to step S42, and if it has reached the FULL value, the process proceeds to the next step S44.

Next, in step S44, the second information signal B stored in the second area 19b in the track buffer memory 19 reaches the FULL value, so that the optical pickup 14 sets the second information signal on the optical disk 13 to the second value. The reproduction in the address area B1 of the area 13b is stopped. Here, from the stage where the reproduction of the second information signal B is stopped, the second information signal B stored in the second area 19b in the track buffer memory 19 is transferred to the AV-ENDEC 20 side to the transfer rate Rb.
However, as is clear from FIG. 6, this read operation takes a second period until the EMPTY value is reached.
The second address area B2 in the area 13b may be finished before the reproduction is started.

Next, in step S45, the first area 1 on the optical disk 13 to be reproduced next by the optical pickup 14 is recorded.
It moves to the second address area A2 in 3a. At this time, the seek time Tba at which the optical pickup 14 moves from the first address area B1 in the second area 13b on the optical disk 13 to the second address area A2 in the first area 13a is 1.5 at maximum. Within seconds. Then, the optical pickup 14 makes the first area 13a on the optical disk 13
When the second area A2 is reached, the process returns to step S32 and is repeated in the same manner. Then, the optical pickup 14 transfers the first and second information signals A and B to the address areas A1, B1,
A2, B2, A3, B3 ,.

The flow for stopping the reproduction by the optical pickup 14 may be inquired after step 37 or after step 44, but the operation becomes complicated, so it is omitted here.

In the reproduction flow described above, the track / buffer memory 19 reaches the EMPTY value from the empty state in the first first cycle, but the recording capacity between the EMPTY value and the FULL value in the second and subsequent cycles. Ya
A first information signal A having a storage capacity and a second information signal having a storage capacity Yb.
The information signal B is stored.

Now, how to set the EMPTY value and the FULL value in the first and second areas 19a and 19b in the track / buffer memory 19 at the time of reproducing the optical disk 13 will be described.

The first and second information signals A and B from the optical pickup 14
Transfer rate to the ... RpMbps) transfer rate of the first information signal A ... Ra (Mbps) transfer rate of the second information signal B ... Rb (Mbps) minimum storage capacity of the track / buffer memory 19 ... Ym
(Mbit) Recording capacity of the first information signal A recorded in the first area 13a on the optical disk 13 ... Ya (Mbit) Recording capacity of the second information signal B recorded in the second area 13b on the optical disk 13 ... Yb (Mbit) The optical pickup 14 has the first area 1 on the optical disk 13.
Seek time required to move from 3a to the second area 13b ...
Tab (s) The optical pickup 14 detects the second area 1 on the optical disk 13.
Seek time required to move from 3b to the first area 13a ...
If Tba (s), this relationship will be described later in (9
It is necessary to satisfy equations (11) to (11).

The seek time Tab (Tba) here means that the reproduction is stopped at the reproduction end position of the information signal A (B) in the area 13a (13b) on the optical disk 13, and the next area 1
When the optical pickup 14 moves to 3b (13a), the optical pickup 14 moved to the next area 13b (13a) confirms the address on the target track in this area 13b (13a) to reproduce the data. This figure shows the total time taken to complete the preparatory work and start the reproduction of the next information signal B (A).

The first and second information signals A, which are reproduced from the optical disk 13 by the optical pickup 14 in a time division manner,
For the transfer rate Rp for storing B in the track buffer memory 19,
Of the first information signal A from the area 19a of
The average transfer rate Ra read to the 20 side and the track
The sum of the average transfer rate Rb for reading the second information signal B from the second area 19b of the buffer memory 19 to the AV-ENDEC 20 side must not exceed this. If this is expressed by a formula, Rp> Ra + Rb (1 formula).

The reproduction time Ta (s) during which the optical pickup 14 reproduces the first information signal A is Ta = Ya / Rp (2) The reproduction during which the optical pickup 14 reproduces the second information signal B The time Tb (s) is Tb = Yb / Rp (Equation 3).

Further, the transfer rate Rp of the first and second information signals A and B by the optical pickup 14 and the transfer rate Ra of the first information signal A and the transfer of the second information signal B from the transfer rate Rp. The ratio with the difference value obtained by subtracting the rate Rb is Rp / (Rp-Ra-Rb) (Equation 4). At this time, Rp corresponds to one cycle period until the first and second information signals A and B are reproduced and then the first information signal A is reproduced, and (Rp-Ra-Rb) is It corresponds to the seek period in one cycle period.

Meanwhile, the first time and for one cycle of the second information signal A, and reproduces the B and then reproducing the first information signal A until the total seek time in one cycle period The ratio of and is (Ta + Tab + Tb + Tba) / (Tab + Tba) (Equation 5).

Since the ratio of the above formula (4) is equal to the ratio of the above formula (5), Rp / (Rp-Ra-Rb) = (Ta + Tab + Tb + Tba) / (Tab + Tba) ... (Equation 6) becomes, and if this (Equation 6) is modified, it becomes (Ta + Tb) = (Ra + Rb) * (Tab + Tba) / (Rp-Ra-Rb) (Equation 7). By substituting (Equation 2) and (Equation 3) into this (Equation 7), (Ya + Yb) = Rp × (Ra + Rb) × (Tab + Tba) / (Rp−Ra−Rb) (Equation 8).

The transfer rate Rp between the optical disk 13 and the track / buffer memory 19 is constant,
On the other hand, the transfer rates Ra and Rb of the first and second information signals A and B read from the track buffer memory 19 are determined by the recording state recorded on the optical disc 13,
Furthermore, depending on the address on the optical disc 13 to be played back, the specifications of the device, and the like, the seek times Tab and Tba described above can be obtained.
Therefore, in order to stably satisfy this relationship, the recording capacity Ya of the first information signal A and the capacity Yb of the second information signal B, which are the minimum capacity for continuously performing reproduction, are determined. Must satisfy the following (Equation 9), (Equation 10), (Equation 11).

That is, (Ya + Yb) ≧ Rp × (Ra + Rb) × (Tab + Tba) / (Rp−Ra−Rb) (Equation 9) Ya ≧ Rp × Ra × (Tab + Tba) / (Rp−Ra−Rb) ((Formula 9)) Formula 10 Yb ≧ Rp × Rb × (Tab + Tba) / (Rp−Ra−Rb) (Formula 11) That is, the transfer rate Rp when reproducing from the optical disc 13
And the transfer rates R of the first and second information signals (reproduction signals) A and B read from the track buffer memory 19.
a, Rb and seek times Tab, Tba of the optical pickup 14 moving between the area positions of the first and second information signals A, B on the optical disc 13, the first and second information signals A, Rb are determined. , B, the recording capacity of the smallest recording unit Ya, Y
b, or the reproduction times Ta and Tb are (9) to (11).
If the expression) is not satisfied, the continuity at the time of reproducing both information signals A and B will be lost.

In short, when the first information signal A is reproduced, the data amount not less than the recording capacity Ya of the minimum recording unit is read into the track buffer memory 19 at a time and the reproduction process is performed, and the second information signal B is reproduced. In the case of reproducing, the data amount of the recording capacity Yb or more of the minimum recording unit is read into the track buffer memory 19 at one time and the reproducing process is performed.

In other words, in the recorded and read-only optical disk 13, in order to continuously and simultaneously reproduce the two information signals A and B as described above on the AV-ENDEC 20 side, the optical disk 13 in the reproducing apparatus is to be reproduced. By considering the relationship between the reproduction transfer rate Ra and the seek times Tab and Tba, the recording capacities Ya and Yb of the minimum recording unit are set as described above, so that continuous reproduction can be performed.

Further, this means that the position where the data to be reproduced following Ya or Yb exists does not follow Ya or Yb on the optical disk 13, and this is continuously reproduced even at a distant position. It shows that you can.

The above equations (9) to (11) are the recording capacities Ya and Y of the minimum recording areas of the two information signals A and B.
b, the maximum size of the track buffer memory 19 is determined, and the EMPTY value and the FULL value are determined.

The basic minimum storage capacity Ym of the track / buffer memory 19 is: Ym> (Tb + Tab + Tba) × Ra + (Ta + Tab + Tba) × Rb (Equation 12) or Ym> Ta × (Rp-Ra) + Tb X (Rp-Rb) ... (Equation 13).

From the above (2), (3), (10) and (11), both of the above (12) and (13) are expressed as Ym> {(Rp-Ra) * Ra + (Rp −Rb) × Rb} × (Tab + Tba) / (Rp−Ra−Rb) (14 formula).

Therefore, basically, the first area 19 of the track buffer memory 19 for the first information signal A is
a is (Rp−Ra) × Ra × (Tab + Tba) / (R
p-Ra-Rb) or more, the EMPTY value and the FULL value are determined in this range, and the second area 19b of the track buffer memory 19 for the second information signal B is set to (Rp
-Rb) x Rb x (Tab + Tba) / (Rp-Ra-
Rb) or more is secured and EMPTY value and FULL in this range
Determine the value.

However, this is a numerical value that has no margin in management of the track / buffer memory 19, and secondly, from the relationship that the ideal two information signals A and B in FIG. In practice, there is a timing at which it is necessary to reproduce the two information signals A and B at the same time depending on the transfer rate between the two information signals A and B and the input / output timing. In the time section, it is necessary to absorb the signal on one side in the track buffer memory 19 by temporarily storing the data.

Therefore, the minimum storage capacity Ym of the track buffer memory 19 in that case is as follows: Ym> (Ta + Tb + Tab + Tba) × (Ra + Rb) (Equation 15) More generally, the seek times Tab and Tba are fixed to the same value. Letting time be T, Ym> (Ta + Tb + 2 × T) × (Ra + Rb) (Equation 16). Since the value of Ym is not calculated for the retry process, the function as the shock proof memory, and the system margin other than that, it is necessary to secure a value of at least this value.

Therefore, the first area 19a of the track buffer memory 19 for the first information signal A is (Ta +
Tb + 2 × T) × Ra or more is secured and EMPTY is within this range
Value and the FULL value are determined, and the second area 19b of the track buffer memory 19 for the second information signal B is (T
a + Tb + 2 × T) × Rb or more secured and EMP in this range
Determine the TY and FULL values.

From the above equations (2), (3) and (9), Ym> Rp × (Ra + Rb) × (Tab + Tba) / (Rp-Ra) -Rb) (Equation 17) More generally, assuming that the seek times Tab and Tba are T of the same fixed time, Ym> 2 * Rp * (Ra + Rb) * T / (Rp-Ra-Rb) ... ( 18).

Similarly, since the value of Ym is not calculated for the retry processing, the function as the shock proof memory, and the system margin other than that, it is necessary to secure a value of at least this value.

Therefore, the first area 19a of the track / buffer memory 19 for the first information signal A is Rp × R.
Ax (Tab + Tba) / (Rp-Ra-Rb) or more is secured, and the EMPTY value and the FULL value are determined within this range, and the track / buffer memory 19 for the second information signal B is determined.
Second region 19b of Rp × Rb × (Tab + Tba)
/ (Rp-Ra-Rb) or more, and EMPT in this range
Determine Y and FULL values.

Here, the track buffer memory 19 is the 64 Mb track buffer memory 19 connected to the signal processing circuit 18 of FIG. 1 in the present embodiment, but is naturally connected to the AV-ENDEC 20 of FIG. 6
A part of the 4 Mb buffer memory 21 is similarly tracked.
It may be used as a buffer memory.

That is, the track / buffer memory 19 absorbs the difference between the transfer rate of the reproduction signal from the optical pickup 14 to the information signal recording medium such as the optical disk 13 and the transfer rate of the compressed and expanded signal such as video. . However, in this embodiment, the signal processing circuit 18 of FIG.
Using a 64 Mb track buffer memory 19 connected to the above as an example, the recording capacity required by the first information signal A and the second information signal B is divided into one track buffer memory 19. In addition, by allocating and using the area remaining as a result of the calculation at that ratio, it is possible to increase the margin of each track buffer.

For example, the transfer rate R of the first information signal A
a is 8 Mbps, the required storage capacity of the first area 19a of the track / buffer memory 19 is 32 Mbps for the first information signal A, while the second information signal B is
If the transfer rate Rb is 4 Mbps and the required storage capacity of the second area 19b of the track / buffer memory 19 for this second information signal A is 16 Mbps, then 64
Instead of leaving the remaining 16 Mb, which is the area with the excess of Mb, by dividing it into 2 to 1 at about 10 Mb to 5 Mb,
By setting the storage capacity of the first area 19a of the track buffer memory 19 to 32Mb + 10Mb = 42Mb and the storage capacity of the second area 19b of the track buffer memory 19 to 16Mb + 5Mb = 21Mb, the track buffer memory 19 is enabled. Can be used for Thereby, two continuous information signals A and B can be processed simultaneously.

Further, as the track buffer memory 19, at the time of normal reproduction of any one of the information signal A and the information signal B, the entire 64 of the track buffer memory 19 is reproduced.
Mb is used as one track buffer. This processing is performed by the system controller 22 that manages the reproduction, by the reproduction instruction, to the track / buffer memory 19.
The second areas 19a and 19b are secured. This allows
It is possible to improve playability such as retries in normal reproduction operation. Incidentally, these first and second regions 1
The timing of division into 9a and 19b is performed when the data in the track / buffer memory 19 is confirmed at the time when the reproduction input is instructed and it is confirmed that there is no intermediate data during the reproduction. The timing is, for example, information signals A and B to be reproduced during the reproduction process.
Similarly, when the transfer rates Ra and Rb are changed, the data in the track / buffer memory 19 is confirmed, and it is confirmed that there is no intermediate data during replay recording. As a result, the transfer rates Ra of the information signals A and B,
The margin of the track buffer memory 19 can be optimized in real time when Rb is changed.

Here, in the case of the read-only optical disk 13, the seek time Ta by the optical pickup 14 described above is used.
b, Tba maximum allowable time Tmax = (Tab · ma
x) and (Tba · max) are standardized in order to suppress variations among manufacturers, and the maximum permissible times (Tab · max) and (Tba · max) are the same, for example, for a recording type. For the optical disc 13 for DVD, 1.
It is set to 5 seconds. Therefore, when the above-mentioned condition is applied to the above-described (formula 9), (Ya + Yb) ≧ Rp × (Ra + Rb) × 2 × Tmax / (Rp−Ra−Rb) (Formula 19) Substituting Tmax = 1.5 seconds results in (Ya + Yb) ≧ 3 × Rp × (Ra + Rb) / (Rp−Ra−Rb) (Equation 20), where (Equation 19) or (Equation 20) The first and second areas 1 on the optical disk 13 so as to satisfy the conditions.
The first and second information signals A and B having the recording capacities Ya and Yb, respectively, may be recorded in the 3a and 13b in advance.

<Information Signal Recording Device> FIG. 7 is a diagram schematically showing an information signal recording device to which the first and second information signals are recorded on the optical disk. FIG. 8 shows the first and second information signal recording devices. FIG. 9 is a flowchart showing a state of recording the information signal on the optical disc, and FIG. 9 is a timing chart showing a state of recording the first and second information signals on the optical disc.

The technical concept of the information signal recording apparatus is the same as that of the information signal reproducing apparatus described above, and the input / output relationship is opposite to that of the information signal reproducing apparatus.

As shown in FIG. 7, the information signal recording device is
The optical pickup 14 converts the first and second information signals A and B input to the first and second areas 19a and 19b of the track buffer memory 19 at the first and second transfer rates Ra and Rb, respectively. The recording operation is performed on the first and second areas 13a and 13b on the optical disk 13 in a time division manner at a constant transfer rate higher than the first and second transfer rates Ra and Rb.

That is, the optical disc 13 is formed so as to be recordable and reproducible, and the recording capacity Ya is recorded on the optical disc 13.
A first area 13a for recording the first information signal A having a recording capacity and a second area 13b for recording the second information signal B having a recording capacity Yb are prepared in advance.

Further, as described above with respect to the information signal reproducing apparatus, as shown in FIG. 4, the first area 13a on the optical disk 13 is divided into a plurality of areas within a range where the seek time described later can be kept. And addresses A1 and A for each area
2, A3, ... Are added so that the first information signal A can be divided and recorded. Similarly, the second area 13b on the optical disk 13 is also divided into a plurality of areas within a range in which a seek time described later can be protected, and addresses B1, B2, B3, ...
Can be recorded separately. Also here, the capacities of the address areas A1, A2, A3, ...
The capacities of 1, B2, B3, ... Match the recording capacity Yb, respectively. At this time, between the first address area A1 in the first area 13a to be recorded first and the first address area B1 in the second area 13b to be recorded next, the optical pickup 14 moves 1.5 times. The range of movement within a second is set, in other words, the seek time of the optical pickup 14 that moves between the first information signal A and the second information signal B to be recorded next is the maximum. Within 1.5 seconds.

When recording on the optical disk 13, the AV-
The MPEG encoder in the ENDEC 20 has the first and second
A recording mode in which the user specifies the transfer rates Ra and Rb of the information signals A and B (transfer rate 8 Mbp for high image quality)
s, transfer rate 4 Mbps for slightly high image quality, transfer rate 2 Mbps for normal image quality), and the first and second information signals A and B to be recorded are AV-E.
The first and second 64 Mb track buffer memories 19 connected from the NDEC 20 to the signal processing circuit 20 (FIG. 1)
Are temporarily stored in the areas 19a and 19b, and at this time, the optical pickup 14 is in a standby state in which a predetermined track on the optical disc 13 to be recorded is in a state of waiting for a kick. Each area 1 of the track / buffer memory 19
While controlling the remaining amount in 9a and 19b,
The capacity of each area 19a, 19b of the buffer memory 19 is F
When the value reaches the ULL value, the first information signal A stored in the first area 19a of the track buffer memory 19 of the correction unit by adding the error correction code, the address and the sync signal at the time of recording on the optical disc 13 and the track The second information signal B stored in the second area 19b of the buffer memory 19
Are alternately read in a time division manner, and the first information signal A read by the optical pickup 14 at a constant transfer rate Rp is placed in the first area 13a on the optical disc 13, and the second information signal B is placed on the optical disc 13. Are alternately recorded in the second area 13b in a time division manner. Repeat this,
It keeps recording continuously.

Here, the operation of the information signal recording apparatus will be described with reference to FIGS. In addition, in FIG.
The transfer rates Ra and Rb of the second information signals A and B are illustrated as the same transfer rate for convenience of illustration, but the same tendency is exhibited even when the two are different.

First, in step S51, the recording flow is started.

Next, in step S52, the optical pickup 14 becomes the first recording position on the optical disk 13
It is confirmed whether the first address area A1 (target position) in the area 13a has been reached. If the address area A1 (target position) is not reached, this step S
52 is further continued, and when the address area A1 (target position) is reached, the process proceeds to the next step S53.

Next, in step S53, AV-END
The first information signal A sent from the EC 20 side at the transfer rate Ra is transferred to the first area 19 of the track / buffer memory 19.
It is temporarily stored in a. At this time, the system controller 22 (FIG. 1) constantly monitors the EMPTY value and the FULL value of the first area 19a in the track buffer memory 19 until the first information signal A reaches the FULL value. It is stored at the transfer rate Ra.

Next, in step S54, the first area 19a stored in the first area 19a in the track buffer memory 19 is stored.
Asks whether or not the information signal A of has reached the FULL value.
If the LL value has not been reached, the operation of step S53 is continued, and if the FULL value has been reached, the process proceeds to the next step S55.

Next, in step S55, when the first information signal A reaches the FULL value, the first information signal A is read out to the optical pickup 14 side at a constant transfer rate Rp, so as shown in FIG. In addition, between the FULL value and the EMPTY value, the first information signal A decreases with the slope of the difference (Rp-Ra), and the first information signal A changes to the optical pickup 14
Is recorded in the first area 13a on the optical disk 13 at a constant transfer rate Rp.

Next, in step S56, it is asked whether or not the first information signal A stored in the first area 19a in the track buffer memory 19 has reached the EMPTY value.
When the EMPTY value is not reached, the process returns to step S55, and when the EMPTY value is reached, the next step S5 is performed.
Proceed to 7.

Next, in step S57, the first information signal A stored in the first area 19a in the track buffer memory 19 reaches the EMPTY value, so that the optical pickup 14 sets the first information signal on the optical disk 13 to the first position. The recording in the first address area A1 in the area 13a is stopped. Here, after the recording of the first information signal A is stopped, the first information signal A is continuously sent from the AV-ENDEC 20 side to the first area 19a in the track buffer memory 19 at the transfer rate Ra. However, this write operation is shown in FIG.
As can be seen from the above, the period until reaching the FULL value is the first
In the area 13a, the recording may be finished before the recording of the second address area A2 is started.

Next, in step S58, the second area 1 on the optical disk 13 to be recorded next by the optical pickup 14 is recorded.
Move to the first address area B1 in 3b. At this time, the seek time Tab during which the optical pickup 14 moves from the first address area A1 in the first area 13a on the optical disk 13 to the first address area B1 in the second area 13b is 1.5 at maximum. Within seconds.

Next, in step S59, it is confirmed whether or not the optical pickup 14 has reached the address area B1 (target position) of the second area 13b on the optical disk 13. If the address area B1 (target position) is not reached, step S59 is further continued and the address area B1.
When it reaches 1 (target position), the process proceeds to the next step S60.

Next, in step S60, AV-END
The second information signal B sent from the EC 20 side at the transfer rate Rb is the second area 19 of the track buffer memory 19.
It is temporarily stored in b at the transfer rate Rb until reaching the FULL value.

Next, in step S61, the second area stored in the second area 19b of the track buffer memory 19 is stored.
Asks whether the information signal B of has reached the FULL value,
If the LL value has not been reached, the operation of step S60 is continued, and if the FULL value has been reached, the process proceeds to the next step S62.

Next, in step S62, when the second information signal B reaches the FULL value, the second information signal B is read out to the optical pickup 14 side at a constant transfer rate Rp. Therefore, as shown in FIG. Further, between the FULL value and the EMPTY value, the second information signal B decreases while the second information signal B decreases at the slope of the difference (Rp-Rb).
Is recorded in the second area 13b on the optical disc 13 at a constant transfer rate Rp.

Next, in step S63, it is asked whether or not the second information signal B stored in the second area 19b in the track / buffer memory 19 has reached the EMPTY value.
When the EMPTY value is not reached, the process returns to step S62, and when the EMPTY value is reached, the next step S6 is performed.
Go to 4.

Next, in step S64, the second information signal B stored in the second area 19b in the track buffer memory 19 reaches the EMPTY value, so the optical pickup 14 sets the second information signal on the optical disk 13 to the second position. The recording in the address area B1 of the area 13b is stopped. Here, from the stage where the recording of the second information signal B is stopped, the second information signal B is continuously sent from the AV-ENDEC 20 side to the second area 19b in the track buffer memory 19,
As is apparent from FIG. 9, this write operation may be completed before the recording of the second address area B2 in the second area 13b is started until the FULL value is reached.

Next, in step S65, the first area 1 on the optical disk 13 to be recorded next by the optical pickup 14 is recorded.
It moves to the second address area A2 in 3a. At this time, the seek time Tba at which the optical pickup 14 moves from the first address area B1 in the second area 13b on the optical disk 13 to the second address area A2 in the first area 13a is 1.5 at maximum. Within seconds. Then, the optical pickup 14 makes the first area 13a on the optical disk 13
When the second area A2 is reached, the process returns to step S52 and is repeated in the same manner, so that the optical pickup 14 transfers the first and second information signals A and B to the address areas A1, B1,
It is possible to record continuously in the order of A2, B2, A3, B3, ...

The flow for stopping all recording by the optical pickup 14 may be inquired after step 57 or after step 64, but the operation is complicated, so it is omitted here.

In the recording flow described above, the track / buffer memory 19 reaches the FULL value from the empty state in the first first cycle, but the recording capacity between the EMPTY value and the FULL value in the second and subsequent cycles. The first information signal A having Ya and the second information signal B having the recording capacity Yb are stored.

In the above information signal recording device,
I / O relationship is reversed, but I explained earlier (1 formula)
To (18) are satisfied, and detailed description thereof is omitted here.

<Information Signal Recording / Reproducing Apparatus> FIG.
FIG. 11 is a diagram schematically showing an information signal recording device to which a mode of recording a second information signal on an optical disc is applied.
FIG. 12 is a flowchart showing a state of recording the second information signal on the optical disc, and FIG. 12 is a timing chart showing a state of recording the first and second information signals on the optical disc.

As shown in FIG. 10, the information signal recording / reproducing apparatus is a combination of the information signal recording apparatus and the information signal reproducing apparatus described above, and has the first and second transfer rates Ra and Rb. One of the first and second information signals A and B having the information signal A (B) is the optical disc 13
The optical pickup 1 from the upper one area 13a (13b)
No. 4, the first and second transfer rates R are reproduced by time division.
The information signal B (A) of the other side is stored in one area 19a, (19b) of the track buffer memory 19 at a constant transfer rate Rp faster than a, Rb and the other area 19b, (of the track buffer memory 19). The optical pickup 14 reads data from the optical disk 19a) at a constant transfer rate Rp and records the data in the other area 13b (13a) on the optical disk 13 in a time division manner.

The operation of the information signal recording / reproducing apparatus will be described with reference to FIGS. 11 and 12. In FIG. 12, the transfer rates Ra and R of the first and second information signals A and B are shown.
b is shown at the same transfer rate for convenience of illustration,
Even if the two are different, the same tendency is exhibited.

First, in step S71, a recording / reproducing flow is started.

Next, in step S72, the optical pickup 14 is set as a first reproduction position on the optical disk 13.
It is confirmed whether the first address area A1 (target position) in the area 13a has been reached. If the address area A1 (target position) is not reached, this step S
72 is further continued, and when the address area A1 (target position) is reached, the process proceeds to the next step S73.

Next, in step S73, the optical pickup 14 sets the first address area A in the first area 13a.
The reproduction is started from 1 and the first information signal A is transferred at the transfer rate R
The first area 19 in the track buffer memory 19 at p
It is temporarily stored in a. At this time, the system controller 22 (FIG. 1) constantly monitors the EMPTY value and the FULL value of the first area 19a in the track / buffer memory 19, and the first information signal only in the first first cycle. The transfer rate Rp is stored until A reaches the EMPTY value.

Next, in step S74, the first area 19a stored in the first area 19a in the track buffer memory 19 is stored.
Asks whether the information signal A of E has reached the EMPTY value, and E
If the MPTY value has not been reached, the process returns to step S73, while if it has reached the EMPTY value, the process proceeds to the next step S75.

Next, in step S75, when the first information signal A exceeds the EMPTY value, the first information signal A is read to the AV-ENDEC 20 (FIG. 1) side at the transfer rate Ra, and therefore, shown in FIG. EMPTY value and FU
Between the LL value and the transfer rate Rp at which the first information signal A is written in the first area 19a of the track buffer memory 19, the first information signal A is transferred from the first area 19a to the AV-ENDEC 20 side. Transfer rate Ra to be read
The first information signal A is temporarily stored in the first area 19a while increasing with the gradient of the difference (Rp-Ra).

Next, in step S76, it is asked whether or not the first information signal A stored in the first area 19a in the track / buffer memory 19 has reached the FULL value.
When the UL value is not reached, the process returns to step S75, while when the FULL value is reached, the next step S75 is performed.
Proceed to 77.

Next, in step S77, the first information signal A stored in the first area 19a in the track buffer memory 19 reaches the FULL value, so that the optical pickup 14 sets the first information signal on the optical disk 13 to the first value. 1 in area 13a
The reproduction in the th address area A1 is stopped. here,
From the stage where the reproduction of the first information signal A is stopped, the first information signal A stored in the first area 19a in the track buffer memory 19 is continuously read at the transfer rate Ra to the AV-ENDEC 20 side. However, as is clear from FIG. 12, this read operation takes the second address area A in the first area 13a until the EMPTY value is reached.
It suffices to end the process before starting playback of 2.

Next, in step S78, the optical pickup 14 moves to the first address area B1 in the second area 13b on the optical disk 13 in order to record the second information signal B next. At this time, the seek time Tab during which the optical pickup 14 moves from the first address area A1 in the first area 13a on the optical disk 13 to the first address area B1 in the second area 13b is 1.5 at maximum. Within seconds.

Next, in step S79, it is confirmed whether or not the optical pickup 14 has reached the address area B1 (target position) of the second area 13b on the optical disk 13. Here, if the address area B1 (target position) is not reached, this step S79 is further continued, and the address area B1
When it reaches 1 (target position), the process proceeds to the next step S80.

Next, in step S80, AV-END
The second information signal B sent from the EC 20 side at the transfer rate Rb is the second area 19 of the track buffer memory 19.
It is temporarily stored in b at the transfer rate Rb until reaching the FULL value.

Next, in step S81, the second area stored in the second area 19b in the track buffer memory 19 is stored.
Asks whether the information signal B of has reached the FULL value,
If the LL value has not been reached, the process returns to step S80,
On the other hand, when the FULL value is reached, the next step S82
Proceed to.

Next, in step S82, when the second information signal B reaches the FULL value, the second information signal B is read out to the optical pickup 14 side at a constant transfer rate Rp. Therefore, as shown in FIG. In addition, between the FULL value and the EMPTY value, the second information signal B decreases with the slope of the difference (Rp-Rb), while the second information signal B changes to the optical pickup 1
4, the data is recorded in the second area 13b on the optical disk 13 at a constant transfer rate Rp.

Next, in step S83, it is asked whether or not the second information signal B stored in the second area 19b in the track / buffer memory 19 has reached the EMPTY value.
If the EMPTY value has not been reached, the process returns to step S82, while if the EMPTY value has been reached, the process proceeds to the next step S84.

Next, in step S84, the second information signal B stored in the second area 19b in the track buffer memory 19 reaches the EMPTY value, so that the optical pickup 14 sets the second information signal on the optical disk 13 to the second position. The recording in the address area B1 of the area 13b is stopped. Here, from the stage where the recording of the second information signal B is stopped, the second information signal B is continuously sent from the AV-ENDEC 20 side to the second area 19b in the track buffer memory 19,
This writing operation is FULL as shown in FIG.
The period until reaching the value may be completed before the recording of the second address area B2 in the second area 13b is started.

Next, in step S85, the optical pickup 14 moves to the second address area A2 in the first area 13a on the optical disk 13 to reproduce the first information signal A next. At this time, the seek time Tba at which the optical pickup 14 moves from the first address area B1 in the second area 13b on the optical disk 13 to the second address area A2 in the first area 13a is 1.5 at maximum. Within seconds.

Then, when the optical pickup 14 reaches the second area A2 in the first area 13a on the optical disk 13, the process returns to step S72, and if the same procedure is repeated thereafter, the optical pickup 14 outputs the first and second information signals. Address areas A, B are A1, B1, A2, B2, A3, B3, ...
It is possible to record and play back alternately in time sequence in the order of. At this time, the address information of the second information signal B recorded in the free area in the second area 13b on the optical disc 13 is recorded in the management area 13c after the recording is completed.

The flow for stopping all recording / reproduction by the optical pickup 14 may be inquired after step 79 or after step 86, but the operation is complicated and is omitted here.

In the flow of time-division recording / reproduction of the two information signals described above, the track / buffer memory 1
The second area 19b of 9 reaches the FULL value from the empty state in the first first cycle, but the second information signal B having the recording capacity Yb between the EMPTY value and the FULL value in the second and subsequent cycles. You will remember.

The above-mentioned information signal recording / reproducing apparatus also satisfies the above-described (1) to (18), and the detailed description thereof will be omitted here.

Here, in the above-mentioned information signal recording / reproducing apparatus, for example, in the state where the first information signal A is first reproduced from the optical disk 13, a new second information signal B is generated.
When recording, the second information signal B to be recorded is input, and the transfer rate Rb of the second information signal B is input and set. At this time, the system controller 22 sets the transfer rate Rb of the input second information signal B and the transfer rate R of the first information signal A currently being reproduced.
a and an empty area for recording the management area of the optical disk 13 and the seek time pre-recorded in the ROM as the device are described above (expression 9), expression 10 and expression 11).
To determine the minimum recording area capacity for recording.

For example, when the optical disk 13 has only a large unrecorded area, the capacity of the minimum recording area does not matter, but when small unrecorded areas are scattered due to repeated editing, the It is possible to record only in the free area larger than the capacity of the minimum recording area of, and cannot be recorded in the smaller free area.

As described above, when the area cannot be effectively secured, the transfer rate Rb of the second information signal B to be recorded is set.
It is also possible to decrease the transfer rate designated as, notify the user of this, and perform recording as described above with this decreased value.

Next, the information signal recording and / or reproducing apparatus 1
0A partially modified information signal recording and / or reproducing apparatus 1
0B will be briefly described with reference to FIG.

FIG. 13 is a block diagram for explaining the overall structure of the information signal recording and / or reproducing apparatus 10B.

In the information signal recording and / or reproducing apparatus 10B shown in FIG. 13, the optical disk rotating means 11 and 12, the optical pickup 14, the driver circuit 15 and the preamplifier 1 are provided on the optical disk drive D side in a frame surrounded by a dotted line.
6, the servo circuit 17 is provided as a unit, and the signal processing circuit 1 is provided in the frame surrounded by the alternate long and short dash line on the solid-state memory M side.
8, track / buffer memory 19, AV-ENDEC
20, buffer memory 21, system controller 2
2, a plurality of keys 23 are provided as a unit,
The difference from the first embodiment is that the solid-state memory M side is detachable from the optical disc drive D side by a connector connection (not shown). In other words, the track / buffer memory 19 or the buffer memory 21 in the solid-state memory M is the optical pickup 14 in the optical disc drive D.
It is removable from the side. Therefore, when the solid-state memory M is mounted on the optical disk drive D, one or both of the first and second information signals A and B read from the optical disk 13 by the optical pickup 14 are temporarily stored as in the first embodiment. However, when the solid-state memory M is removed from the optical disk drive D, the first and the first temporarily stored in the track / buffer memory 19 or the buffer memory 21.
Either or both of the second information signals A and B can be reproduced by the AV-ENDEC 20 serving as the reproduction processing means. At this time, since the capacity of the track / buffer memory 19 or the buffer memory 21 is 64 Mbits, the audio signal can be reproduced for about 1 hour and the video signal can be reproduced for about 10 minutes. As described above, when the track / buffer memory 19 or the buffer memory 21 is attached to the optical disc drive D, it functions as a device, and when the track / buffer memory 19 or the buffer memory 21 is removed from the optical disc drive D, a portable solid-state memory is reproduced. It can function as a device.

<Second Embodiment> FIG. 14 is a block diagram for explaining the overall configuration of an information signal communication apparatus related to the present invention. Incidentally, for convenience of explanation, the same reference numerals are given to the same constituent members as the constituent members shown above, and they will be appropriately described.
In addition, new components will be denoted by new reference numerals, and the second embodiment will be described focusing on the points different from the first embodiment.

While the information signal recording and / or reproducing apparatus 10A described above is an optical disk player that compresses and expands a video signal and an audio signal, the information signal communication shown in FIG. The device 25A has an optical disk drive configuration having no compression / expansion block, and an ATAPI interface 26 for communication connection with the outside is provided on the output side of the track / buffer memory 19 provided in the optical disk drive. The host computer 27 and a compression / decompression block of an AV-ENDEC (audio / video encoder / decoder) 20 are connected to the outside as a host computer, but the other parts are the same as those of the first embodiment. Is the same as. The optical disc drive described above is the same as the optical disc drive of the first embodiment except that the AV-ENDEC 20, the buffer memory 21, and the key 23 are removed from the information signal recording and / or reproducing apparatus 10A.

More specifically, there is an I / F block in the ATAPI interface 26, and the AV-EN
There is an I / F block in the I / F part of DEC20, and AT
Mount Fuji Mt., which is an industry group that connects with the API interface 26 and defines commands for computer peripheral disk storage devices. The optical disk drive is controlled based on the Fuji command system.

That is, in the above-described first embodiment, the first and the first data input at the time of recording by the optical disk player 10 are used.
The second information signals A and B are analyzed to determine their respective transfer rates Ra and Rb, and the first and second information signals A and B are transferred from the recording state of the optical disk 13 when the optical disk player 10 is reproduced. Although the rates Ra and Rb are determined by calculation, in the second embodiment, since the optical disk drive does not have a key input section or a decoding section for control data from the optical disk 13, the first and second rates are recorded at the time of recording. 2 information signals A and B transfer rates Ra and Rb
From the host side to I in the ATAPI interface 26
Input via the / F block.

At this time, in the case of recording processing, for example, when a video signal of a transfer rate of 2 Mbps is input, the host 27
Transfers the content to the I / F section of the AV-ENDEC 20, and transfers the transfer rate flag of the above signal to the optical disk drive in addition to the information such as the recording command and the recording start address as described below. This is decoded by the signal processing portion of the optical disk drive, and the recording processing is performed as described above according to the type.

Next, in the case of the reproduction process, for example, the video signal recorded at the predetermined address of the optical disk 13 is reproduced in accordance with the reproduction command based on the mount Fuji command system as described above. The host 27 interprets this data and calculates the transfer rate as described above. Then, the host 27 determines that the video signal has a transfer rate of 2 Mbps, for example.
The contents are transferred to the copy section, and the transfer rate flag of the signal is transferred in addition to the reproduction command as described below. This is decoded in the signal processing portion, and the reproduction processing is performed as described above according to the transfer rate.

Although the ATAPI interface 26 for communication connection with the outside has been described as an example for performing communication, a standard such as IEEE 1394 may be used, and radio waves or optical signals other than communication using such a cable may be used. It may be a communication using. Although the signal to be recorded / reproduced is mainly described as video data, it goes without saying that it may be audio or music data, a still picture, a sub-picture, or a decoded signal obtained by decoding these. That is,
The transfer rate mentioned here indicates a transfer rate of data in a range that cannot be established as information unless data is transferred at a transfer rate in a certain range on average. Further, in the present embodiment, the optical disk 13 is mainly described, but the present invention can also be applied to an apparatus such as a magnetic disk apparatus which has a plurality of disks and a plurality of heads and alternately performs switching while recording and reproducing. Although the disk is assumed to have a spiral continuous track, it can also be applied to a case where the disk is composed of a plurality of concentric tracks like a magnetic disk device. In this case, a kick operation of the track is performed during continuous recording / reproduction, but this operation is also applicable if it is considered as a seek time. Further, the recording / reproducing procedure and the display content are merely examples and are not limited to this range.

Although the signal transfer rate is mainly described with respect to continuous signals such as video and audio, computer data and the like that are meaningless unless they are processed within a predetermined time are used here. , Belongs to continuous data, and
Generally, it includes a variable transfer rate and a fixed transfer rate that change moment by moment depending on the image quality on the time axis.

Next, an information signal communication device 25B obtained by partially modifying the information signal communication device 25A will be briefly described with reference to FIG.

FIG. 15 is a block diagram for explaining the overall configuration of the information signal communication device 25B.

In the information signal communication device 25B shown in FIG. 15, the optical disk rotating means 11, 12 and the optical pickup 1 are provided on the optical disk drive D side in a frame surrounded by a dotted line.
4, a driver circuit 15, a preamplifier 16, and a servo circuit 17 are provided as a unit, and a signal processing circuit 18 and a track
The buffer memory 19 and the system controller 22 are provided as a unit, and the solid-state memory M side is detachable from the optical disk drive D side and the ATAPI interface 26 side by a connector connection (not shown). It is a different point. In other words, the track / buffer memory 19 in the solid-state memory M is connected to the optical pickup 14 side in the optical disc drive D and A
It is detachable from the TAPI interface 26 side. Therefore, when the solid-state memory M is attached to the optical disk drive D and the ATAPI interface 26, either one of the first and second information signals A and B read from the optical disk 13 by the optical pickup 14 as in the second embodiment, or Both of them are temporarily stored, and when the solid-state memory M is removed from the optical disk drive D and the ATAPI interface 26 side, either one or both of the first and second information signals A and B temporarily stored in the track / buffer memory 19 are stored. Can be played. At this time, the track
Since the buffer memory 19 has a capacity of 64 Mbits, it can reproduce an audio signal for about 1 hour and a video signal for about 10 minutes.

[0145]

As described above in detail, according to the present invention, the maximum transfer capacity of the information signal recording medium can be obtained, and the areas of the first and second information signals are efficiently divided in the buffer memory. In addition, the user can smoothly obtain the functions of continuous reproduction of the first and second information signals, continuous recording, continuous recording / reproduction, and the like.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an overall configuration of an information signal recording and / or reproducing apparatus.

FIG. 2 shows an information signal recording and / or reproducing apparatus in which first and second areas are provided between first and second areas on an optical disk and first and second areas on a track buffer memory. It is the figure which showed typically the state which records and / or reproduces an information signal in time division by one optical pickup.

FIG. 3 is a diagram schematically showing an information signal reproducing device to which a mode of reproducing first and second information signals from an optical disc is applied.

FIG. 4 is a diagram showing addresses of first and second areas on an optical disc.

FIG. 5 is a flowchart showing a state in which the first and second information signals are reproduced from the optical disc.

FIG. 6 is a timing chart showing a state in which the first and second information signals are reproduced from the optical disc.

FIG. 7 is a diagram schematically showing an information signal recording device to which a mode of recording first and second information signals on an optical disc is applied.

FIG. 8 is a flowchart showing a state in which the first and second information signals are recorded on the optical disc.

FIG. 9 is a timing chart showing a state in which the first and second information signals are recorded on the optical disc.

FIG. 10 is a diagram schematically showing an information signal recording device to which a mode of recording and reproducing the first and second information signals is applied.

FIG. 11 is a flowchart showing a state of recording and reproducing the first and second information signals on the optical disc.

FIG. 12 is a timing chart showing a state of recording and reproducing the first and second information signals on the optical disc.

FIG. 13 is a block diagram for explaining an overall configuration of an information signal recording and / or reproducing apparatus of a modified example.

FIG. 14 is a block diagram for explaining an overall configuration of an information signal communication device.

FIG. 15 is a block diagram for explaining an overall configuration of an information signal recording and / or reproducing apparatus of a modified example.

[Explanation of symbols]

10A, 10B ... Information signal recording and / or reproducing apparatus, 1
3 ... Information signal recording medium (optical disc), 13a ... First area, 13b ... First area, 14 ... Head (optical pickup), 19 ... Track / buffer memory, 19a ... First area, 19b ... First Area, 20 ... Audio / Video / Encoder / Decoder (AV-ENDEC), 2
5A, 25B ... Information signal communication device, 26 ... ATAPI
interface.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 20/10-20/16 351 H04N 5/92 H04N 5/85

Claims (3)

(57) [Claims] 1. Rotating an information signal recording medium having first and second information signals recorded at first and second positions, respectively, and from the first and second positions on the information signal recording medium. A step of temporarily storing the first and second information signals reproduced by time division in a buffer memory and outputting the first and second information signals at the first and second transfer rates, respectively. , The first and second information signals reproduced from the first and second positions on the information signal recording medium in a time division manner at a constant transfer rate higher than the first and second transfer rates. and forwarding by time division from the head to the buffer memory, outputting a first transfer rate ... Rp of the second information signal, said first information signal to be transferred from the head to the buffer memory from the buffer memory to <br/> transfer rate ... Ra A transfer rate at which the second information signal is output from the buffer memory ... Rb, the first information signal from the head to the buffer memory
Information unit amount to be transferred to the memory ... Ya, the second information signal from the head to the buffer memory
The amount of information unit to be transferred to Yb, the time required for the head to move from the first position to the second position on the information signal recording medium, Tab, and the second time on the information signal recording medium, The time required to move from the position to the first position is Tba, and (Ya + Yb) ≧ Rp × (Ra + Rb) × (Tab + Tba) / (Rp−Ra−Rb) Ya ≧ Rp × Ra × (Tab + Tba) / (Rp−Ra) -Rb) Yb ≧ Rp × Rb × (Tab + Tba) / (Rp−Ra−Rb) is satisfied to reproduce the first and second information signals from the information signal recording medium. A characteristic information signal reproducing method. 2. A step of rotating an information signal recording medium for recording first and second information signals, respectively, and the first and second information signals input at first and second transfer rates, respectively.
Temporarily storing the second information signal in the buffer memory, and reading the first and second information signals time-divisionally read from the buffer memory at a constant rate faster than the first and second transfer rates . the from one head at a transfer rate on the information signal recording medium 1, and recording a time-division in the second position, first, the transfer rate of the second information signal to be transferred from the buffer memory to the head Rp, transfer rate for inputting the first information signal into the buffer memory Ra, transfer rate for inputting the second information signal into the buffer memory Rb, The first information signal to the head, the buffer memory
Information unit amount transferred from the ... Ya, the second information signal to the head, the buffer memory
Amount of information unit transferred from Yb, time required for the head to move from the first position to the second position on the information signal recording medium ... Tab, the second position of the head on the information signal recording medium From the first position to the first position ... Tba, (Ya + Yb) ≧ Rp × (Ra + Rb) × (Tab + Tba) / (Rp−Ra−Rb) Ya ≧ Rp × Ra × (Tab + Tba) / (Rp−Ra− Rb) Yb ≧ Rp × Rb × (Tab + Tba) / (Rp−Ra−Rb) is satisfied and the first and second information signals are recorded on the information signal recording medium. And information signal recording method. 3. A step of rotating an information signal recording medium for recording and reproducing for recording either one of the first and second information signals and reproducing the other, and a first step on the information signal recording medium. One head from position
Temporarily stored in the buffer memory one of the information signal reproduced by and outputs at a first transfer rate temporarily the buffer memory to store the other information signal input at the second transfer rate And a step of transferring one of the information signals reproduced from the first position on the information signal recording medium to the buffer memory at a constant transfer rate faster than the first and second transfer rates, and performing time-divided and recording by the head in a second position on said information signal recording medium of the other information signal inputted into the memory by the constant transfer rate, in the buffer memory by the head first, the transfer rate ... Rp of the second information signal, the first, the buffer information signals towards the recording of the second information signal input for The buffer transfer rate ... Ra, the first transfer rate ... Rb of the information signal of better to reproduction of the second information signal outputted from said buffer memory, the information signal of better to the recording to the head to be input to memory Information unit amount transferred from the memory ... Ya, Information unit amount transferred the information signal to be reproduced from the head to the buffer memory ... Yb, The head is moved from the first position to the second position on the information signal recording medium. The time required to move to the position ... Tab, the time required to move the head from the second position to the first position on the information signal recording medium ... Tba, and (Ya + Yb) ≧ Rp × (Ra + Rb) × (Tab + Tba ) / (Rp−Ra−Rb) Ya ≧ Rp × Ra × (Tab + Tba) / (Rp−Ra−Rb) Yb ≧ Rp × Rb × (Tab + Tba) / (Rp− It said first to said information signal recording medium meets a-Rb) relations,
And a step of recording / reproducing a second information signal.