JP2002319224A - Information signal reproducing device, information signal recording device, and information signal recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb differences in transfer rate of (n) pieces of information signals among an information signal recording medium and a buffer memory. SOLUTION: The device is equipped with a buffer memory 19, which temporarily stores the (n) information signals and outputs the signals at respective transfer rates and a pickup head 14 which reproduces the (n) information signals from an information recording medium 13 on a time-division basis and transfers them on a time-division basis to the buffer memory 19 at transfer rates faster than those of the output from the buffer memory 19; then the differences between the transfer rates of the (n) information signals by the one pickup head 14 to the information signal recording medium 13 and the transfer rates of the (n) information signals in the buffer memory 19 are absorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of storing n (where n is an integer of 2 or more) information signals based on video information such as a plurality of movies and audio information such as a plurality of music, into n buffer memories. The present invention relates to an information signal reproducing apparatus, an information signal recording apparatus, and an information signal recording / reproducing apparatus which record and / or reproduce information on an information signal recording medium such as light or magnet in a time-division manner by a single pickup (or head) through the same.

[0002]

2. Description of the Related Art Conventionally, an optical disk apparatus (for example, a DVD player) to which an optical disk is applied as an information signal recording medium.
In such cases, information signals such as video information such as movies and audio information such as music are compressed and recorded on an optical disk by an optical pickup, and a compressed information signal read from the optical disk by the optical pickup during reproduction is expanded. Also, in a device to which this kind of compression / expansion technology is applied, for example, a buffer memory of about 4 Mbits is provided inside the device, and a signal having a transfer rate of 10.08 Mbps read from an optical disk is transmitted at a rate of 10.08 Mbps. When converting a signal having a low variable transfer rate into a transfer rate, the difference in transfer rate is absorbed by the buffer memory.

Further, Japanese Patent Application Laid-Open No. 10-92158 discloses that, when data of a plurality of stories and scenes is recorded on a recording medium, the physical movement distance of an optical pickup during reproduction can be reduced. There is disclosed a technical idea that enables suppression of occurrence of breaks and disturbances.
Here, it is also considered to record a multi-angle scene in which the same event that progresses simultaneously is photographed from a plurality of angles, for example, on an optical disk. The time during which data cannot be reproduced while moving the position of the optical pickup is absorbed by the buffer memory. At this time, when one desired angle is selected from several types of angles from the optical disc, a signal of one angle intermittently recorded on the optical disc is selectively transmitted while jumping the optical pickup. It discloses the relationship between the seek time of the optical pickup and the buffer memory capacity required for reproducing and absorbing the continuity of the signal during this time in the buffer memory.

[0004] The applicant of the present invention has disclosed Japanese Patent Application Laid-Open No. Hei 6-13969.
Japanese Patent Application Laid-Open No. 6-26,199 proposes a method of absorbing a difference in transfer rate with a buffer memory and recording and reproducing two or more signals from one disk. That is, in the recording / reproducing apparatus disclosed in JP-A-6-139696, digital data having a first transfer rate generated by compressing the information amount of a recording signal to be recorded / reproduced is converted to a predetermined modulation rate. A recording operation of converting into digital data for recording / reproduction having a second transfer rate higher than the above-mentioned first transfer rate and modulated on a recording medium, and recording the data on a recording medium; A reproduction operation of restoring digital data for recording and reproduction into digital data having a first transfer rate and then converting the digital data to a reproduction signal and outputting the reproduced signal is performed by an information signal for recording on a recording medium and a reproduction operation performed on the recording medium. This is performed in a time-division manner so that the information signal becomes a simultaneous signal.

[0005]

In the recording / reproducing apparatus disclosed in Japanese Patent Laid-Open No. Hei 6-139696, the compression ratio of one digital audio signal is 1/5.
Is applied so that recording and reproducing operations can be performed satisfactorily without play time. In recent years, information signal recording media such as optical discs have been increased in density, capacity, and digitalization. Accordingly, two or more information signals are recorded in different areas of the information signal recording medium, and two or more (here, n) information signals are alternately time-divisionally divided by one optical pickup head on the information signal recording medium. The present invention is an improvement over the prior art in order to satisfy the above requirements.

[0006]

SUMMARY OF THE INVENTION 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) means for rotating an information signal recording medium on which n information signals (where n is an integer of 2 or more) are recorded at n positions, and temporarily storing the n information signals, A buffer memory for outputting the n information signals temporarily stored at respective transfer rates; a buffer memory movably provided in a radial direction of the information signal recording medium; At least one head that reproduces the information signals in a time-division manner and transfers the n information signals to the buffer memory in a time-division manner at a transfer rate faster than that at the time of output from the buffer memory, An information signal configured to absorb, by the buffer memory, a difference between a transfer rate of the head to the n information signals and a transfer rate of the n information signals output from the buffer memory; A reproducing apparatus, wherein a transfer rate of the head to the n information signals: Rp, a sum of transfer rates of the n information signals, ΔRn, and a reproduction information unit amount of the n information signals. Sum of time ΔYn, sum of time required for the head to move from the current position to the next position on the information signal recording medium ΔSn, ΔYn ≧
An information signal reproducing apparatus characterized by satisfying a relational expression of Rp × ｎRn × ΣSn / (Rp-ΣRn) and reproducing the n information signals from the information signal recording medium in a time-division manner. (2) n input at each transfer rate (however,
a buffer memory for temporarily storing information signals of (n is an integer of 2 or more), means for rotating an information signal recording medium having n positions for recording the n information signals, respectively, The n information signals read from the buffer memory are time-divided into the n positions on the information signal recording medium at a transfer rate faster than the respective transfer rates. At least one head for recording in the buffer memory, and the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input to the buffer memory is determined by the buffer memory. An information signal recording device configured to absorb the light, wherein the n
Rp, the sum of the transfer rates of the n information signals, ΣRn, the sum of the recording information unit amounts of the n information signals, ΣYn, and the head records the information signal. Sum of each time required to move from the current position to the next position on the medium: {Sn, {Yn ≧ Rp ×}
An information signal recording device which records the n information signals from the buffer memory on the information signal recording medium in a time-division manner while satisfying a relational expression of Rn × ΣSn / (Rp-ΣRn). (3) Means for recording at least one of n information signals (where n is an integer of 2 or more) and rotating a recording / reproducing information signal recording medium for reproducing the remaining information signals. A buffer memory for temporarily storing the n information signals, and for inputting / outputting an information signal for recording on the information signal recording medium and an information signal for reproduction at respective transfer rates; An operation of recording the information signal input to the buffer memory on the information signal recording medium at a transfer rate faster than the transfer rate of the signal, the information signal recording medium being provided movably in a radial direction of the signal recording medium; And an operation of transferring the information signal reproduced from the buffer memory at a transfer rate higher than the transfer rate of the signal to the buffer memory in a time-division manner. An information signal recording / reproducing apparatus configured to absorb a difference between a transfer rate of the n information signals and a transfer rate of the n information signals input / output to / from the buffer memory in the buffer memory. , The transfer rate of the head to the n information signals ... R
p, the sum of the transfer rates of the n information signals...
n, the sum of the unit amounts of the recording / reproducing information of the n information signals ... {Yn, the sum of the time required for the head to move from the current position to the next position on the information signal recording medium ...}
Sn, and ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−Σ
An information signal recording / reproducing apparatus which records and reproduces the n information signals on the information signal recording medium by satisfying a relational expression of Rn).

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an information signal reproducing apparatus, an information signal recording apparatus, and an information signal recording / reproducing apparatus according to the present invention will be described below with reference to FIGS. 2
Example> and <Third Embodiment> will be described in detail in this order.

<First Embodiment> In an information signal recording and / or reproducing apparatus, a DVD-RA is used as an information signal recording medium.
Optical disks such as M, DVD-RW, DVD + RW,
The present invention can be applied to a magnetic disk such as a hard disk and a floppy (registered trademark) disk, a solid-state memory device using a semiconductor, and the like. In the following embodiments, a case where an optical disk is applied as an information signal recording medium will be described.

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

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 rotatable on a turntable 12 attached to a shaft of a spindle motor 11. Is provided.

An optical head (hereinafter, referred to as an optical pickup) 14 is provided so as to be movable in the radial direction of the optical disk 13 so as to face the optical disk 13. The optical pickup 14 irradiates a laser spot on the optical disc 13 by a collimator lens, an objective lens, or the like, using a semiconductor laser provided inside, though not shown, as a light source. At this time, the semiconductor laser is driven by the laser drive circuit, and the information signal input when recording an information signal such as an audio signal or a video signal is input to the laser drive circuit after the waveform is corrected by the waveform correction circuit. .

A command to start recording and / or reproduction by a selection operation of a plurality of keys 23 is transmitted to the system controller 2.
The signal read out from the optical pick 14 is generated by the preamplifier 16 to generate a reproduction signal and a servo signal, and the optical pickup 14 controls the servo circuit 17 by the servo circuit 17. By processing the signals, focusing and tracking signals are generated for the tracks on the optical disk 13, and a driver circuit 15 drives an actuator in the optical pickup 14 to perform one round of servo control of the optical pickup 14, The optical pickup 14 is moved in the radial direction of the optical disc 13 by a feed motor so as to reproduce a sector of a target track on the optical disc 13 based on control data on the optical disc 13.

A read signal read from the optical pickup 14 with one correction block as the minimum unit is used to optimize the frequency characteristic of the read signal by the preamplifier 16 using an equalizer, to apply a PLL, and to generate a PLL bit clock, It has a jitter generation circuit generated from a comparison of the data time axis, and the system controller 22 A / D converts and measures this jitter value, and changes the waveform correction circuit at the time of recording according to this value.

The signal is converted into a digital signal by a signal processing circuit 18 and, for example, synchronization detection is performed.
3 is decoded into NRZI data from the EFM + signal, and error correction is performed in units of correction blocks. The sector address signal and the first, second,..., N-th (n is an integer of 2 or more) described later Information signal. Since these n information signals are signals compressed at a variable transfer rate, they are stored in 64 MB (64
One correction block is temporarily stored as a minimum unit in the track buffer memory 19 using a DRAM of (megabytes), and the time axis of the variable transfer rate of the first, second,..., Nth information signals is absorbed. It is carried out. The signal read from the track buffer memory 19 is an audio signal.
Video / encoder / decoder (hereinafter, AV-ENDE)
The audio signal and the video signal are decompressed and separated from the n information signals compressed based on MPEG2 by the decoder in 20), and the audio signal and the video signal are separated by the NTSC encoder 24 into the audio signal. Is output to the display 25 as a video signal.

Also, 26a to 26n are the first and second to be recorded.
Second,... Input terminals for inputting the n-th information signal, respectively. And a plurality of input terminals 26a to 26n
The first, second,..., N-th information signals input from
The data is compressed at a compression rate set by an encoder in the V-ENDEC 20, temporarily stored in a buffer memory 21 connected to the AV-ENDEC 20, and each information signal is input to the signal processing 18 in a time-division manner.

On the other hand, it is also possible to input in the form of a compressed information signal (transport stream signal form) as the first, second,..., Nth information signals to be recorded.
In this case, for example, a plurality of information signals received by the satellite broadcast receiving antenna 41 are
2, performs QPSK demodulation, performs error correction processing, generates a transport stream signal (in units of 188 bytes), converts the stream into a program stream (in units of 2,048 bytes) via the SW 43 via the SW 43, and, if necessary, The information signal, which has been encrypted by scrambling based on the key information recorded on the optical disk 13, is input to the signal processing unit 18, and the signal processing unit 18 adds an error correction code to the What is necessary is just to store it temporarily. At this time, the SW 43 selectively switches between a plurality of information signals received by the satellite broadcast receiving antenna 41 and a plurality of information signals input from the Internet terminal 45.

In the AV-ENDEC 20, the speed of decompression is determined in accordance with the recording and / or reproduction mode to be described later based on the control data written on the optical disk 13, and the decompression is performed in accordance with the determined speed. Is connected.

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 of the optical disk 13 at CLV is controlled by the speed signal. In addition, a rotation position signal of the hall element of the spindle motor 11 is fed back to the servo circuit 17, and a speed signal generated from the signal is used to perform FG control of constant rotation. The whole controller between the LSIs is controlled by the system controller 22.

Also, in order to set the resolution of an image to be recorded or a high-speed scene such as a car race, or to set a recording time priority, key input and external control data are transferred to a microcomputer in the system controller 22. Has a switching terminal, which allows the recording time to be changed, and allows an external user to select the setting.

As will be described later, the user can reproduce a video signal or the like recorded on the optical disc 13,
In addition to recording the video signal, the video signal in a different area on the optical disc 13 can be reproduced while the video signal currently being recorded is recorded as it is. Further, the video signal or the like can be recorded in a different area on the optical disc 13 while the video signal currently being reproduced is being reproduced as it is. Similarly, the video signal and the like can be recorded in different areas on the optical disc 13 while the video signal currently being recorded is recorded as it is. As a result, the user can enjoy functions such as post-recording recording and back-program recording.

Here, in the information signal recording and / or reproducing apparatus 10, the first, second,.
One optical pickup is provided between the n-th areas 13a, 13b,..., 13n and the first, second,..., N-th areas 19a, 19b,. The case of recording and / or reproducing n information signals based on video information, audio information, etc. in a time-division manner with reference to FIG. 14 will be described with reference to FIGS.

FIG. 2 shows an information signal recording and / or reproducing apparatus according to a first embodiment of the present invention.
,..., N in the track buffer memory and the first, second,.
.., And schematically show a state in which an n-th information signal is recorded and / or reproduced in a time-division manner by one optical pickup. In FIG. 2, illustration of a preamplifier and a signal processing circuit is omitted for easy understanding. Also,
FIG. 3 is a diagram showing the addresses of the first, second,..., N-th areas (data areas) on the optical disc and the addresses of the management areas.

As shown in FIG. 2, a first area 13a on the optical disc 13 is a data area for recording a first information signal A having a recording capacity Ya as a minimum unit for recording and reproduction (for example, an address A1 area in FIG. 3). The second area 13b is a data area for recording a second information signal B using the recording capacity Yb as a minimum unit for recording / reproduction (for example, an address B1 area in FIG. 3). The area 13n has a recording capacity Yn which is the minimum unit of recording and reproduction (for example, the address N in FIG. 3).
This is a data area for recording the n-th information signal N (one area). At this time, the first, second,..., N-th information signals A, B,..., N may be either information that is related to each other or information that is completely unrelated.

Here, as shown in FIG. 3A, the first area 13a on the optical disk 13 is divided into a plurality of areas within a range where a seek time described later can be maintained, and an address A1, A2, A3,... Are provided so that the first information signal A can be divided and recorded and reproduced. Also, as shown in FIG.
3 is also divided into a plurality of areas within a range in which a seek time described later can be maintained, and an address B is assigned to each area.
., B2, B3,... Are added so that the second information signal B can be divided and recorded and reproduced. Similarly, as shown in FIG. 3 (N), the n-th area 13n on the optical disk 13 is also divided into a plurality of pieces within a range in which a seek time described later can be maintained, and addresses N1, N
., N3,... Are added so that the n-th information signal N can be divided and recorded / reproduced.

At this time, for example, the first address area A1 in the first area 13a to be recorded or reproduced first and the first address area B1 in the second area 13b to be recorded or reproduced next are The optical pickup 14 is, for example, 1.5
The seek time of the optical pickup 14 moving from the currently recording or currently reproducing address area to the next recording or reproducing address area as a whole is set in a range that can be moved within seconds. Is within 1.5 seconds at the maximum.

Returning to FIG. 2, a management area 13x is provided on the inner peripheral portion of the optical disk 13, and this management area 13x is provided.
x is an address X ｛for example, addresses X1 and X in FIG.
2,... Area｝, the first, second,..., N-th areas 13a, 13b,.
If the first, second,..., N-th information signals A, B,..., N are not recorded in each of the 3n address areas, the start address and the end address as empty areas are managed. On the other hand, if they are recorded,
.., N-th information signals A, B,..., N, start addresses and end addresses, transfer rates of these information signals, title information, copyright information, etc. are recorded and managed. ing.

A first buffer memory (hereinafter, referred to as a first area) 19 in the track / buffer memory 19.
a is an area for temporarily storing the first information signal A,
A second buffer memory (hereinafter, referred to as a second area) 19b in the track buffer memory 19 is an area for temporarily storing the second information signal B. The n-th buffer memory (hereinafter referred to as an n-th area) 19n is an area for temporarily storing the n-th information signal N.

.., N in a time division manner between the optical disk 13 and the track buffer memory 19. Optical pickup 1
., N-th information signals A, B,.
, N, the transfer rate Rp is set constant, and this constant transfer rate Rp is, for example, 25 Mbps. The transfer rate R to the first and second information signals A, B,..., N by the one optical pickup 14 described above.
p is a first, second,..., n-th information signal A,
The transfer rates Ra, Rb,..., Rn of B,.

The track / buffer memory 19 and A
The first, second,..., N-th information signals A, B,..., N are transferred between the V-ENDEC 20 and the transfer rate of the first information signal A at this time. Ra, the transfer rate of the second information signal B is a transfer rate Rb, and similarly, the transfer rate of the n-th information signal N is a transfer rate Rn. The present invention is characterized in that the first, second,..., N-th information signals A, B,.

Here, transfer rates Ra, Rb,..., R of the first, second,..., N-th information signals A, B,.
n can be selected with priority given to image quality, and is set to one of the following transfer rates, for example, 8 Mbps, 4 Mbps, or 2 Mbps. . A mode in which the transfer rate for high image quality is, for example, 8 Mbps and the recording time is 2 hours; A mode with a recording rate of 4 hours at a transfer rate of slightly higher image quality, for example, 4 Mbps,. The following three modes are prepared at a transfer rate for normal image quality, for example, a recording time of 8 Mbps at 2 Mbps, and the first, second,... .., Rn of the n-th information signals A, B,..., N are set, while the first, second,. , N, the compression rate at the time of recording is read from the control data recorded in association with the n-th information signals A, B,..., N, and the first, second,. B,..., N transfer rates Ra, Rb,.
.., Rn are set.

The system controller 22 shown in FIG. 1 controls the first, second,..., N-th areas 19 in a 64 MB (64 megabytes) track buffer memory 19.
, 19n are transferred to the first, second,..., n-th information signals A, B,.
.., Rn are divided and set according to the value of Rn.
a, 19b,..., 19n include an EMPTY value indicating that the storage capacity is empty and a FULL value indicating that the storage capacity is full, the first, second,..., n-th information signals A, B,. …,
The transfer rates are set according to the values of N transfer rates Ra, Rb,..., Rn. Then, the system controller 22
Are the respective areas 19a in the track buffer memory 19,
.., 19n, the remaining storage amount between the EMPTY value and the FULL value is constantly monitored.

As a different form, the transfer rates Ra, Rb,..., Rn of the first, second,..., N-th information signals A, B,. Each area 19a, 19b,... In the track buffer memory 19,.
.., 19n are divided not according to the recording mode or the reproduction mode. For example, assuming that the n information signals A, B,... N have the same transfer rate, the reproduction signal does not cause a great problem even if the continuity of reproduction is slightly impaired at the time of reproduction, but the recording signal is continuous. If recording cannot be performed, a fatal defect will occur. Therefore, for example, the recording is occupied more in the track buffer memory 19. This processing is performed at the time when the system controller 22 inputs a recording or reproduction instruction, as described above, when the data in the track buffer memory 19 is confirmed, and when it is confirmed that there is no intermediate data being reproduced or recorded. Do with.

In the information signal recording and / or reproducing apparatus 10 described above, The first, second,...,
The N-th information signals A, B,..., N are reproduced by one optical pickup 14 in a time-division manner, and the information signals A, B,.
, N, the track buffer memory 19 at a constant transfer rate Rp faster than the transfer rates Ra, Rb,.
., N-th information signals A, B,..., N from the track buffer memory 19.
Is output at each of the transfer rates Ra, Rb,..., Rn; .., N-th transfer rates Ra, Rb,
,..., Rn to input the first, second,..., N-th areas 19a, 1 in the track buffer memory 19, respectively.
9, 1st, 2nd, temporarily stored in 19nb
,..., N by the optical pickup 14 at a constant transfer rate Rp faster than the respective transfer rates Ra, Rb,.
Second,..., N-th regions 13a, 13b,.
When recording in time division, From the optical disk 13 for recording / reproduction, the first, second,.
, N-th information signal A, B,..., N is reproduced by the optical pickup 14 in a time-division manner and is transferred at a constant rate faster than each of the transfer rates Ra, Rb,. An information signal which is temporarily stored in the track buffer memory 19 at the rate Rp and which is not reproduced among the first, second,..., N-th information signals A, B,. In this case, the data is read from the memory 19 by the optical pickup 14 at a constant transfer rate Rp and recorded on the optical disk 13 in a time-division manner. At this time, the first, second,.
, N-th information signals A, B,..., N can be recorded or reproduced.

Now, here, one optical pickup 14
.., N from the optical disk 1
An operation condition for maintaining continuity in time division between the optical disk 13 and the track buffer memory 19 via the optical pickup 14 when recording and / or reproducing in time division 3 will be described.

The first, second,...
..., the transfer rate to the n-th information signal A, B, ..., N ...
Rp (Mbps) Transfer rate of first information signal A: Ra (Mbps) Transfer rate of second information signal B: Rb (Mbps) ... Transfer rate of n-th information signal N: Rn (Mbps) Minimum storage capacity of track buffer memory 19 ... Ym
(Mbit) Recording capacity of the first information signal A recorded in the first area 13a on the optical disc 13 ... Ya (Mbit) Recording capacity of the second information signal B recorded in the second area 13b on the optical disc 13 ... Yb (Mbit) ... Recording capacity of the nth information signal N recorded in the nth area 13n on the optical disc 13 ... Yn (Mbit) The optical pickup 14 moves from the current area to the next area on the optical disc 13 Seek time required ... Sn (s)
However, S1 (= Sab) is transferred from the first area 13a to the second area 13b on the optical disk 13 by S2 (= Sbc).
Is changed from the second region 13b to the third region 13c, and similarly, Sn (= Sna) is changed from the n-th region 13n to the next first region 13c.
Assuming that the seek time 移動 required to move to the area 13a of the formula (3), this relationship is expressed by the following equations (10, 11,
Equations (13) and (14 to 16) must be satisfied.

The seek time Sn here means that the recording or reproduction of the current information signal is stopped at the recording end position or the reproduction end position in the current area on the optical disc 13 and the optical pickup 14 moves to the next area. Time, and the optical pickup 14 moved to the next area confirms the address on the target track in this area, finishes the preparation work for recording or reproduction, and starts recording or reproduction of the next information signal. It indicates the time obtained by adding the time required to perform the operation.

When recording or recording / reproducing the n information signals A, B,..., N in a time-division manner, the first, second,. ,
, 19b,..., 19n
The transfer rates Ra, R of the n-th information signals A, B,.
b,..., Rn (ΣRn = Ra + Rb... + Rn)
.., 13n on the optical disk 13 and the first, second,..., N-th areas 19a, 1
9b,..., 19n, exceeding the transfer rate Rp by one optical pickup 14 for transferring the first, second,..., Nth information signals A, B,. Not be.

The above case is represented by the following equation: Rp> Ra + Rb... + Rn (Equation 1).

A recording time or a reproduction time Ta (s) for recording or reproducing the first information signal A by the optical pickup 14.
Is Ta = Ya / Rp (Equation 2), and the recording time or reproduction time Tb (s) in which the optical pickup 14 records or reproduces the second information signal B is Tb.
= Yb / Rp (Equation 3) Similarly, the recording time or reproduction time Tn (s) for recording or reproducing the n-th information signal N by the optical pickup 14 is represented by T
n = Yn / Rp (Equation 4)

Also, the transfer rate Rp of the optical pickup 14 to the first, second,..., N-th information signals A, B,.
.., The transfer rate R of the n-th information signal A, B,.
a, Rb,..., Rn, and the ratio to the difference value are Rp / (Rp-Ra-Rb... -Rn) (Equation 5).

At this time, Rp described above is the first, second,.
, N-th information signals A, B,..., N are recorded or recorded / reproduced in a time-division manner and correspond to one cycle period from the next recording / reproducing of the first information signal A. (Rp-Ra-Rb... -Rn) corresponds to the seek period in this one cycle period.

On the other hand, the first, second,..., N-th information signals A, B,..., N are recorded or recorded / reproduced in a time-division manner, and then the first information signal A is recorded or reproduced. .. + Tn + Sn) / (S1 + S2... + Sn) (Equation 6).

Here, since the ratio of the above equation (5) and the ratio of the above equation (6) have the same relationship, Rp / (Rp−Ra−Rb... -Rn) = (Ta + S1 + Tb + S2. n + Sn) / (S1 + S2... + Sn) (Equation 7) When this (Equation 7) is transformed, (Ta + Tb... + Tn) = (Ra + Rb... + Rn) .times. (S1 + S2... Ra-Rb... -Rn) (Equation 8) By substituting (2) and (3) into (8), (Ya + Yb ... + Yn) = Rp * (Ra + Rb ... + Rn) * (S1 + S2 ... + Sn) / (Rp-Ra-Rb ... -Rn) (Equation 9)

Here, the transfer rate Rp between the optical disk 13 and the track buffer memory 19 is the first, second,.
.., The transfer rate R of the n-th information signal A, B,.
a, Rb,..., Rn are set to a constant transfer rate faster than Rn. On the other hand, transfer rates Ra, Rb,..., Rn of the first, second,..., N-th information signals A, B,.
Is determined by a user setting during recording, and is determined by a recording state recorded on the optical disc 13 during reproduction. Further, since the seek time Sn of the optical pickup 14 is determined by the address on the optical disk 13 for reproduction and the specifications of the apparatus, etc., in order to satisfy this relationship stably, recording or recording / reproduction must be continuously performed. , N, the total recording capacity ΣYn of the first, second,..., N-th information signals A, B,. Each of the recording capacities Ya, Yb,..., Yn must satisfy the following (Equations 14 to 16).

That is, (Ya + Yb... + Yn) ≧ Rp × (Ra + Rb... + Rn) × (S1 + S2... + Sn) / (Rp−Ra−Rb... -Rn) (Equation 10) + Yn, ΣRn = Ra + Rb... + Rn ΣSn = S1 + S2... + Sn When the above (Equation 10) is expressed by a general expression, the following expression is obtained. .

The above-described seek time Sn is a variable value which is a time required for moving to the next place, and the seek time is the same fixed time required for moving between the innermost circumference and the outermost circumference of the optical disc 13. When the allowable seek time S, which is the time, is given by ΣSn = n × S (Equation 12), substituting (Equation 12) into (Equation 11) gives: (Rp−ΣRn) (Equation 13) The above-described allowable seek time S is a recording type DVD.
It is set to about 1.5 seconds on the optical disc 13 for use.

Each of the recording capacities Ya, Yb,..., Yn
Must satisfy the following (Equation 14) to (Equation 16) for each transfer rate Ra, Rb,..., Rn.

Ya ≧ Rp × Ra × (S1 + S2... + Sn) / (Rp−Ra−Rb... −Rn) (Equation 14) Yb ≧ Rp × Rb × (S1 + S2... + Sn) / (Rp−Ra−) Rb ...- Rn) (Equation 15) ... Yn≥Rp * Rn * (S1 + S2 ... + Sn) / (Rp-Ra-Rb ...- Rn) (Equation 16) A transfer rate Rp,
, Rn of the first, second,..., Nth information signals A, B,.
.., N-th regions 13a, 13b,.
, 13n, the seek times S1, S2,..., Sn of the optical pickup 14 are determined, and the minimum of the first, second,..., Nth information signals A, B,. The recording capacity Ya, Yb,..., Yn of the recording unit, or the recording time or the reproduction time Ta, Tb,.
If the equations (11, 13) and (14 to 16) are not satisfied, the continuity of the information signals A, B,... In short, when recording or recording / reproducing the n information signals A, B,..., N on the optical disc 13 in a time-division manner, the position where the data to be subsequently recorded or reproduced exists on the optical disc 13 This indicates that recording or recording / reproduction can be performed continuously even at a remote position. In addition, the above (Equation 10, 11, 13) and (Equation 14 to 16)
Are the total recording capacities ΣYn of all the recording areas of the n information signals A, B,..., N and the respective recording capacities Ya, Yb,.
Is determined, the maximum size of the track buffer memory 19 is determined, and the EMPTY value and the FULL value are determined.

Next, when recording and / or reproducing n information signals A, B,..., N, the basic minimum storage capacity Ym of the track buffer memory 19 is as follows: Ym> Rp × ΣRn × ΣSn / (Rp-ΣRn) (17)

If the seek time Sn is the allowable seek time S, which is the same fixed time required to move between the innermost circumference and the outermost circumference of the optical disk 13, Ym> Rp × ΣRn × n × S / (Rp−ΣRn) (Equation 18)

In this embodiment, the track buffer memory 19 is a 64 MB (64 megabyte) track buffer memory 19 connected to the signal processing circuit 18 shown in FIG. ENDEC20
A part of the buffer memory 21 of 64 MB (64 megabytes) connected to the CPU may be similarly used as a track buffer memory.

Next, one optical pickup 14 uses n
When recording the information signals A, B,..., N on the optical disc 13 in a time-division manner, it is necessary to know each free area in the first, second,. There is.

Therefore, here, the start address and the end address of the free area are specified from the interval between the start address and the end address of the data area recorded in the management area 13c on the optical disk 13, and the independent free area is specified. The capacity is calculated, the capacity of the free area and the position information of the free area are stored together, and this is repeated to calculate and store the same for all the free areas.

At this time, when the transfer rate of the information signal to be recorded is, for example, three kinds of 2, 4, 8 Mbps,
It is determined by calculation whether the capacity of each independent free area allows continuous recording or continuous recording and reproduction.

For the seek time of one optical pickup 14, since the rotation of the optical disk 13 is controlled by CLV, the address difference between the addresses is calculated, and the seek table stored in the program ROM in the system controller 22 is referred to. Thus, the number of track movements based on the address difference is obtained. By performing a predetermined coefficient operation on this, the seek time of the optical pickup 14 is calculated. Alternatively, the seek time of the optical pickup 14 may be set as a predetermined constant value depending on the device, or may be set as an allowable seek time determined by a standard.

(Information signal reproducing device) In the information signal reproducing device, the first, second,..., N-th information signals A, B,. Playback is performed in a time-division manner by a pickup.

Here, the optical disk 13 is formed only for reproduction, a first information signal A having a recording capacity Ya is previously recorded on the optical disk 13 in a first area 13a, and has a recording capacity Yb. It is assumed that the second information signal B is recorded in the second area 13b in advance, and similarly, the nth information signal N having the recording capacity Yn is recorded in the nth area 13n in advance.

FIG. 4 is a timing chart showing a state in which the first to n-th information signals are reproduced from the optical disc by one optical pickup in a time-division manner. In FIG. 4, the transfer rates of the first to n-th information signals are shown at the same transfer rate for convenience of illustration, but the same tendency is exhibited even when the two are different.

First, when the reproducing operation to the optical disk 13 is started, the optical pickup 14 reproduces the management area 13c on the optical disk 13 to grasp each address area, and thereafter, the optical pickup 14 moves to the first area. The reproduction is started from the first address area A1 in 13a, and the first information signal A is temporarily stored in the first area 19a in the track buffer memory 19 at the transfer rate Rp. At this time, the system controller 22 (FIG. 1) transmits the EMPTY value of the first area 19a in the track buffer memory 19 and the F
The UL value is constantly monitored, and the first information signal A is stored at the transfer rate Rp until the first information signal A reaches the EMPTY value only in the first cycle.

Next, when the first information signal A exceeds the EMPTY value, the first information signal A becomes AV-E at the transfer rate Ra.
Since the data is read out to the NDEC 20, the first information signal A is transmitted between the EMPTY value and the FULL value as shown in FIG.
And the first information signal A is increased by the slope of the difference (Rp-Ra) between the transfer rate Rp written into the first area 19a and the transfer rate Ra at which the first information signal A is read from the first area 19a to the AV-ENDEC 20 side. Is temporarily stored in the first area 19a.

Next, the first information signal A stored in the first area 19a in the track buffer
When the LL value is reached, the optical pickup 14
1 in the first address area A1 in the first area 13a
Stop playback on. Here, from the stage where the reproduction of the first information signal A is stopped, the track buffer memory 19
The first information signal A stored in the first area 19a is continuously read out to the AV-ENDEC 20 at the transfer rate Ra, and this read operation is performed during the period until the EMPTY value is reached as is apparent from FIG. Is the first area 13a
The processing may be completed before the reproduction of the second address area A2 starts.

Next, the optical pickup 14 moves to the first address area B1 in the second area 13b on the optical disk 13 to be reproduced next. At this time, the optical pickup 14
The seek time S1 during which the optical disk 13 moves from the first address area A1 in the first area 13a to the first address area B1 in the second area 13b on the optical disk 13 has a maximum of 1.5 times.
Within seconds.

Next, the optical pickup 14 is
When the optical pickup 14 reaches the address area B1 (destination position) of the second area 13b on the optical disc 3, the optical pickup 14 starts reproduction from the first address area B1 in the second area 13b on the optical disc 13 and performs the second reproduction. The information signal B is temporarily stored in the second area 19b in the track buffer memory 19 at the transfer rate Rp. At this time, the second information signal B is stored at the transfer rate Rp until the second information signal B reaches the EMPTY value only in the first cycle.

Next, the second information signal B stored in the second area 19b in the track buffer
When the TY value is exceeded, the second information signal B is read out to the AV-ENDEC 20 at the transfer rate Rb, so that the second information signal B is tracked between the EMPTY value and the FULL value as shown in FIG. The slope of the difference (Rp-Rb) between the transfer rate Rp written in the second area 19b of the buffer memory 19 and the transfer rate Rb at which the second information signal B is read from the second area 19b to the AV-ENDEC 20 side. The second information signal B is increased in the second region 19 while increasing.
b is temporarily stored.

Next, the second information signal B stored in the second area 19b in the track buffer
When the LL value is reached, the optical pickup 14
The reproduction in the address area B1 of the second area 13b on the third area 3 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 stored in the AV-EN.
The data is continuously read out to the DEC 20 at the transfer rate Rb.
The period up to the TY value may be completed before the reproduction of the second address area B2 in the second area 13b is started.

Next, the optical pickup 14 moves to an area on the optical disk 13 to be reproduced next, and the same is repeated in the same manner as described above, so that the optical pickup 14 moves from the address area N1 of the n-th area 13n on the optical disk 13 to the When the reproduction of the n information signal N is completed, the optical pickup 14 moves to the second address area A2 in the first area 13a on the optical disk 13 to be reproduced next.

As described above, the first, second,..., N-th information signals A, B,.
To address areas A1, B1,...
N1, A2, B2,..., N2,.

The reproducing operation of the information signal reproducing apparatus satisfies the above-described equations (1) to (18), and a detailed description thereof will be omitted.

(Information Signal Recording Apparatus) The information signal recording apparatus includes first, second,..., N-th transfer rates Ra, Rb,
,..., Rn, the first, second,..., Nth information signals input to the first, second,..., Nth regions 19a, 19b,. A, B,..., N are converted into first,
Second,..., N-th transfer rates Ra, Rb,.
At a faster constant transfer rate, the first
Second,..., N-th regions 13a, 13b,.
The recording operation is performed in a time-division manner.

Here, the optical disc 13 is formed so as to be recordable and reproducible. On the optical disc 13, a first area 13a for recording a first information signal A having a recording capacity Ya, and a recording capacity Yb Information signal B having
And an n-th area 13n for recording an n-th information signal N having a recording capacity Yn. Further, each free area can be grasped from each address area by the management area 13x on the optical disc 13.

When recording on the optical disc 13, the AV
The MPEG encoder in the ENDEC 20 performs a recording mode (high) in which the user specifies the transfer rates Ra, Rb,..., Rn of the first, second,..., N-th information signals A, B,. 8Mbps transfer rate for image quality, 4Mbps transfer rate for slightly higher image quality, 2M transfer rate for normal image quality
bps), and the first, second,..., n-th information signals A, B,.
.., N-th area 19a of a 64 MB (64 megabyte) track buffer memory 19 connected from the V-ENDEC 20 to the signal processing circuit 20 (FIG. 1).
.., 19n, and at this time, the optical pickup 14 is in a standby state and is in a state of waiting for a kick on a predetermined track on the optical disk 13 to be recorded. Each area 1 of the track buffer memory 19
9a, 19b,..., 19n while controlling the remaining amount in each area 19a, 1b of the track buffer memory 19.
When the capacity in 9b, ..., 19n reaches the FULL value,
.., N stored in the track buffer memory 19 in units of correction by adding an error correction code, an address, and a sync signal during recording on the optical disc 13. , Read out at a constant transfer rate Rp faster than the transfer rates Ra, Rb,..., Rn by the optical pickup 14.
.., N are transmitted to the optical disk 13.
The data is recorded in time division on the top. By repeating this, continuous recording is performed.

FIG. 5 is a flowchart showing a state in which the first, second,..., N-th information signals are recorded on the optical disk in a time-division manner by one optical pickup. In FIG. 5, the transfer rates of the first to n-th information signals are shown at the same transfer rate for the sake of illustration, but the same tendency is exhibited even when both are different.

First, when the recording operation on the optical disk 13 is started, the optical pickup 14 reproduces the management area 13c on the optical disk 13 and grasps each free area from each address area. Then, the optical pickup 14 moves to the first address area A1 in the first area 13a on the optical disc 13 to record the first information signal A.

On the other hand, the first information signal A sent from the AV-ENDEC 20 at the transfer rate Ra is temporarily stored in the first area 19a of the track buffer memory 19. At this time, the system controller 22 (FIG. 1) sets the E in the first area 19a in the track / buffer memory 19.
The MPTY value and the FULL value are constantly monitored, and are stored at the transfer rate Ra until the first information signal A reaches the FULL value.

Here, the first information signal A stored in the first area 19a in the track buffer memory 19 is FU
When the LL value is reached, the first information signal A is read out to the optical pickup 14 at a constant transfer rate Rp.
As shown in (1), between the FULL value and the EMPTY value, the first information signal A is reduced by the slope of the difference (Rp-Ra) while the first information signal A is transferred by the optical pickup 14 at a constant transfer rate Rp. First area 1 on optical disc 13
3a.

Next, the first information signal A stored in the first area 19a in the track buffer
When the PTY value is reached, the optical pickup 14 moves to the first address area A in the first area 13a on the optical disc 13.
Stop recording at 1. Here, from the stage where the recording of the first information signal A is stopped, the track buffer memory 1
9, the first information signal A is stored in the first area 19a in the AV-E.
The write operation is continuously performed from the NDEC 20 at the transfer rate Ra, as shown in FIG.
The period up to the L value may be completed before the recording of the second address area A2 in the first area 13a is started.

Next, the optical pickup 14 moves to the first address area B1 in the second area 13b on the optical disc 13 to record the second information signal B next. At this time, the seek time S1 during which the optical pickup 14 moves from the first address area A1 in the first area 13a on the optical disc 13 to the first address area B1 in the second area 13b is 1.5 seconds at the maximum. Within seconds.

On the other hand, the second information signal B sent from the AV-ENDEC 20 at the transfer rate Rb is temporarily stored at the transfer rate Rb in the second area 19b of the track buffer memory 19 until it reaches the FULL value. You. Then, when the second information signal B stored in the second area 19b in the track buffer memory 19 becomes the FULL value, the second
Is read out to the optical pickup 14 side at a constant transfer rate Rp, so that the FUL
Between the L value and the EMPTY value, the second information signal B decreases while decreasing with 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 by the optical pickup 14.

Thereafter, the second information signal B stored in the second area 19b in the track buffer
When the MPTY value is reached, the optical pickup 14 stops recording in the address area B1 of the second area 13b on the optical disc 13. Here, from the stage where the recording of the second information signal B is stopped, the second information signal B is stored in the second area 19b in the track buffer memory 19 in the AV-ENDEC.
5, the write operation is completed if the period up to the FULL value is completed before the start of recording the second address area B2 in the second area 13b, as is apparent from FIG. good.

Next, the optical pickup 14 moves to the area on the optical disk 13 to be recorded next, and the same is repeated in the same manner, and the optical pickup 14 moves to the address area N1 of the n-th area 13n on the optical disk 13. n information signal N
Is completed, the optical pickup 14 moves to the second address area A2 in the first area 13a on the optical disk 13 to be recorded next.

As described above, the first, second,..., N-th information signals A, B,.
To address areas A1, B1,...
N1, A2, B2,..., N2,.

The recording operation of the information signal recording apparatus also satisfies the above-described equations (1) to (18), and a detailed description thereof will be omitted.

(Information Signal Recording / Reproducing Apparatus) The information signal recording / reproducing apparatus is a combination of the above-described information signal recording apparatus and information signal reproducing apparatus.
, N-th information signals A, B,..., N having the n-th transfer rates Ra, Rb,. 1
.., Rn, and store them in the track buffer memory 19 at a constant transfer rate Rp faster than the first, second,..., Nth transfer rates Ra, Rb,. 1, second,..., N-th information signal A, B,.
.., N are read out from the track buffer memory 19 by the optical pickup 14 at a constant transfer rate Rp and recorded on the optical disk 13 in a time division manner.

Although the recording / reproducing operation of this information signal recording / reproducing apparatus is not shown, the information signal to be recorded and the information signal to be reproduced are converted into the recording operation and the information of the information signal recording apparatus described above. What is necessary is just to perform it suitably from the reproduction | regeneration operation of a signal reproduction apparatus, and also the seek time Sn of the optical pickup 14 is 1.5 seconds or less at the maximum here.

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

<Second Example> FIG. 6 is a block diagram for explaining the overall configuration of an information signal communication device according to a second example. still,
For convenience of explanation, the same components as those described above are denoted by the same reference numerals, and will be described appropriately, and new components will be denoted by new reference numerals. The description will focus on the differences from the embodiment.

The information signal recording and / or reproducing apparatus 10 of the first embodiment described above is an optical disk player which compresses and expands a video signal and an audio signal.
The information signal communication device 30 of the second example shown in FIG. 6 has a configuration of an optical disk drive having no compression / decompression block, and the output side of a track / buffer memory 19 provided in this optical disk drive communicates with the outside. A to connect
A TAPI interface 31 is provided, and a host 32 as an external host computer and an AV-E
A point to which a compression / decompression block of an NDEC (audio / video / encoder / decoder) 20 is connected, and a plurality of information signals received by a satellite broadcast receiving antenna 41 and decoded in a digital satellite decoder section 42 or the Internet A plurality of information signals from terminal 45
This is different from the first embodiment in that it is selectively connected to the ATAPI interface 31 in a compressed state via the W43 and the stream converter 44, but the other parts are the same as in the first embodiment. Incidentally, the optical disk drive described above uses the information signal recording and / or reproducing apparatus 10 of the first embodiment.
In AV-ENDEC20, buffer memory 21,
The key 23 is omitted.

More specifically, there is an I / F block in the ATAPI interface 31 and the AV-EN
The I / F block of the DEC 20 has an I / F block, and the AT
It is connected to the API interface 31 and mount Fuji Mt. 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 disc player 10 are used.
.., Rn are determined by analyzing the second,..., Nth information signals A, B,. From the recording state, the transfer rates Ra, Rb,..., R of the first, second,..., N-th information signals A, B,.
Although n is determined by calculation, in the second example, since the optical disk drive does not have a key input unit or a decoding unit for control data from the optical disk 13, the first, second,. , N-th information signals A, B,..., N transfer rates Ra, Rb,.
Is the IAPI in the ATAPI interface 31 from the host side.
/ F block.

At this time, in the case of recording processing, for example, when a video signal having a transfer rate of 2 Mbps is inputted, the host 32
Transfers the contents to the I / F section of the AV-ENDEC 20, and transfers the transfer rate flag of the 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 section of the optical disk drive, and the recording process is performed as described above according to the type. Next, in the case of reproduction processing, for example, a video signal recorded at a predetermined address of the optical disc 13 is reproduced according to a reproduction command based on the command system of the mount Fuji as described above. The host 32 interprets this data and calculates the transfer rate as described above. Then, the host 32 confirms that the video signal has a transfer rate of 2 Mbps, for example, by the AV-ENDEC.
The content is transferred to the I / F unit 20 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 section, and the reproduction processing is performed as described above according to the transfer rate.

Although the TAPI interface 31 for communication connection with the outside has been described as an example of communication, the standard such as IEEE 1394 may be used, and radio waves or light other than communication using such a cable may be transmitted. Communication using may be used. Although the signal to be recorded and reproduced is mainly described with respect to video data, it goes without saying that audio and music data, still images, sub-pictures, and decoded signals obtained by decoding these may be used. In other words, the transfer rate referred to here indicates a data transfer rate in a range that cannot be established as information unless data is transferred at a certain range on average.

Further, in the information signal recording and / or reproducing apparatus 10 of the first embodiment and the information signal communication apparatus 30 of the second embodiment, n information signals A, B,... Or, at the time of reproduction, each information signal A, B,.
Are prioritized according to the degree of importance, and the transfer rate is changed during recording and / or playback, or a seek error occurs during a seek operation, and the information signal is out of the range of the above-described expression. If A, B,..., N do not continue, information signals with lower priority may be truncated. Also,
When the recording operation on the optical disc 13 and the reproducing operation are combined, the recording operation of each of the information signals A, B,..., N is prioritized over the reproducing operation, so that the recording operation is reliably performed without failure. Yes, playback after recording becomes effective.

Further, a part of the information signal recording and / or reproducing apparatus 10 of the first embodiment is modified, or a part of the information signal communication apparatus 30 of the second embodiment is modified, so that the optical disk drive D Optical disk rotating means 11 and 12, optical pickup 14, driver circuit 15, preamplifier 1
6, the servo circuit 17 is provided as a unit, while the signal processing circuit 18, the track / buffer memory 19, and the system controller 22 are provided as a unit as the solid-state memory M, and the solid-state memory M is the optical disk drive D side and the ATAPI interface 31. The side may be made detachable by connector connection (not shown). On this occasion,
The capacity of the track buffer memory 19 is 64 MB (64
(Megabytes), the audio signal can be reproduced for about 1 hour, and the video signal can be reproduced for about 10 minutes.

<Third Embodiment> FIG. 7 is a diagram for explaining a first recording mode when the relational expression (11) is not satisfied in the information signal recording device or the information signal communication device, and FIG.
Is an information signal recording device or an information signal communication device,
FIG. 9 is a diagram for explaining a modification of the first recording mode when the relational expression (11) is not satisfied. FIG. 9 does not satisfy the relational expression (11) in an information signal recording device or an information signal communication device. FIG. 1 for explaining the second recording mode in the case
0 is an information signal recording device or an information signal communication device,
FIG. 14 is a diagram for explaining a third recording mode when the relational expression (11) is not satisfied.

As described above, in the information signal recording device or the information signal communication device, the input first, second,.
, N in the track buffer memory 19 are temporarily stored in the respective areas 19a, 19b,..., 19n, and from the track buffer memory 19, the information signals A, B,. .., N are read out in a time-division manner, and these information signals A, B,.
, Each area 13a, 13b,.
.., 13n in a time-divisional manner, it is necessary to satisfy the relational expression (Equation 11) described above. This determination is made by the system controller 22. Of course, a case where the relational expression (11) cannot be satisfied occurs.

Therefore, in the third embodiment, the structure of the optical disk 13 and the structure of the track buffer memory 19 in the information signal recording device described in the first embodiment or the information signal communication device described in the second embodiment are described. Similarly, n input information signals (information signals A, B,...,
N) is recorded on the optical disc 13 when the optical pickup 1
4, when it is determined that the seek time is not enough to record the n information signals in different areas on the optical disc 13 in a time-division manner, that is, as described above (11)
In the case where the relational expression (Expression) is not satisfied, any one of the first to third recording modes described below is selected.

First, in the first recording mode, if n input information signals (information signals A, B,..., N) do not satisfy the relational expression (11), the n information signals The number of information signals to be recorded is reduced to n ′ (where 2 ≦
The n ′ <n) information signals are selected, and it is determined whether or not the n ′ information signals satisfy the relational expression (11) again, and the relational expression (11) is satisfied. In this case, n ′ information signals selected from n information signals are tracked.
Each area 19a, 19b,... In the buffer memory 19,
19n 'are temporarily stored, and then the n' information signals are time-divisionally recorded in different areas 13a, 13b, ..., 13n 'on the optical disk 13 by the optical pickup 14. At this time, depending on the transfer rate difference of the n ′ information signals, the channel position (for example, NHK and commercial broadcasting), the genre of the information signal (movie, animation, education), etc.
The recording can be performed automatically or by weighting according to a user setting. Furthermore, no selection (n-
The n ′) information signals may be discarded without being temporarily stored in the track buffer memory 19.

The first recording mode will be described more specifically.
As shown in FIG. 7, when the four types of input information signals A, B, C, and D do not satisfy the relational expression (Equation 11),
Two types of information signals A and B are selected from the four types of input information signals A to D, and it is determined whether or not the equation (11) is satisfied again for the information signals A and B. A, B
If the relationship between the transfer rate of the information signal and the transfer rate of the optical pickup 14 to the optical disk 13 and the seek time satisfies (Equation 11), A and B (A1, B1,
A2, B2,...) Are temporarily stored in the track buffer memory 19, and the information signals of A and B are alternately read from the track buffer memory 19 in a time-division manner. By recording the data of A1 in the area, seeking between the areas after recording, recording the data of B1 in the B area, seeking again in the A2 area and recording the data of A2, and repeating this, as a result, A,
Individual data is continuously recorded in the B area.

According to the first recording mode, n ′ (where 2 ≦ n ′ <n) information signals are selected by reducing the number of information signals to be recorded from the input n information signals. so,
Since n ′ information signals are individually recorded in each area of the optical disc 13, a stable operation can be ensured at the time of reproduction, which is advantageous for special reproduction such as fast forward and skip.
When the recording is stopped in the middle of the recording, the remaining free area of each recording area is divided, and the management of the subsequent recording becomes complicated. Further, the information signal recording apparatus requires a large capacity of the track buffer memory 19, and such recording cannot be performed depending on the transfer rate of a plurality of input information signals as described in the above (Equation 11). There is.

Next, in a modification of the first recording mode, the input n information signals (information signals A, B,..., N) are (1)
If the relational expression (1) is not satisfied, n information signals are temporarily stored in the track buffer memory 19, and then n
By connecting some of the information signals among the information signals to form a block, an information signal to be individually recorded among the n signals and an information signal to be recorded after being divided into blocks are tracked. The data is read out from the buffer memory 19 in a time-sharing manner, and
In other words, the n information signals are recorded in at least two or more areas on the optical disc 13 in a time-division manner.

More specifically, a modified example of the first recording mode will be described. As shown in FIG. 8, four types of input information signals A, B, C, and D satisfy the relational expression (11). When there is no information signal, two types of information signals A and (B + C) to be blocked are selected from the four types of input information signals A to D, and the information signals A and (B + C) are selected. It is determined again whether or not the equation (11) is satisfied. If the equation (11) is satisfied, the information signals of A and (B + C) are temporarily stored in the track buffer memory 19, and then the track data is stored.
The information signals of A and (B + C) are read alternately in a time-division manner from the buffer memory 19, the data of A1 is recorded in the A area by the optical pickup 14, the area is sought after recording, and (B1 + C1) is recorded in the B area. Is recorded in the area A2, the data in the area A2 is recorded again, the data in the area A2 is recorded, the area is sought after recording, the data in the area B2 + C2 is recorded in the area B, and this is repeated. The data obtained by dividing individual data into blocks in the B area are continuously recorded.

According to the modification of the first recording mode, an information signal to be individually recorded and an information signal which may be blocked are selected from the input n information signals. Can reduce seek time,
In addition, it is possible to perform both the individual recording and the block recording in accordance with the necessity of the information signal.

Next, in the second recording mode, if the input n information signals (information signals A, B,..., N) do not satisfy the relational expression (11), the n information signals Is temporarily stored in the track buffer memory 19,
The n information signals are read out from the buffer memory 19 in a time-division manner in the transfer order, and all the n information signals are recorded in the same area (one area) on the optical disk 13 by the optical pickup 14.

The second recording mode will be described more specifically.
As shown in FIG. 9, when the four types of input information signals A, B, C, and D do not satisfy the relational expression (Equation 11),
After temporarily storing the four types of information signals A to D in the track buffer memory 19, the track buffer memory 1
9 to read out the information signals of A to D in a time-division manner.
1, B1, C1, D1, A2, B2, C2, D2, ...
The data transferred in this order is recorded in the area A on the optical disk 13 by the optical pickup 14 without rearrangement.

According to the second recording mode, the optical pickup 14 reads the n information signals from the track / buffer memory 19 in a time-division manner in the order of reading.
Since recording is performed in the same area (one area), it is necessary to kick each recording unit during reproduction, and there is a possibility that stability in reproduction may be lacking. However, unlike the first recording mode, subsequent management of recording is not complicated. Also, the information signal recording device can perform recording without requiring a large capacity of the track buffer memory 19 and within a range not exceeding the recording transfer rate.

Next, in the third recording mode, if the input n information signals (information signals A, B,..., N) do not satisfy the relational expression (11), the n information signals Are temporarily stored in the track buffer memory 19 for a plurality of cycles, and then rearranged in the track buffer memory 19 so that the plurality of cycles of each information signal are grouped together. The n information signals are read out from the track / buffer memory 19 in a time-division manner, and the n information signals are grouped in rearranged chunks into the same area (one area) on the optical disk 13 by the optical pickup 14. It is to be recorded.

The third recording mode will be described more specifically.
As shown in FIG. 10, when the input four types of information signals A, B, C, and D do not satisfy the relational expression (Equation 11), the four types of information signals A to D are converted into a plurality of cycles. After being temporarily stored in the track buffer memory 19 for a while, A1, B1,
Data transferred in the order of C1, D1, A2, B2, C2, D2,... Are A1, A2, B1, B2, C1, C
.., D1, D2,..., One data unit is rearranged into large units, and the information signals are rearranged and read in a time-divisional manner for each group.
2), (B1, B2), (C1, C2), (D1, D
2) Recording is performed in the A region on the optical disk 13 by the optical pickup 14 in the order of.

According to the third recording mode, the optical disk 1
3, the recording unit of data recorded in the same area (one area) is large, so that a somewhat stable operation can be ensured at the time of reproduction. This is somewhat advantageous, and the management of subsequent recording is not complicated as in the first recording mode.
Also, as an information signal recording device, a somewhat large track
Since the capacity of the buffer memory 19 is necessary, such recording cannot be performed in a recording unit exceeding the track buffer memory 19.

Here, in the above-described first to third recording modes, there are roughly two recording modes.
In the first recording mode, n information signals are transmitted to the optical disk 13.
The above-described first recording mode (FIG. 7) and a modification of the first recording mode (FIG. 8) correspond to the above-described recording in which seek is interposed in at least two or more areas. On the other hand, in the second recording mode, n information signals are recorded in the same area (one area) on the optical disk 13 without interposing a seek, and the second recording mode (FIG. 9) and the third recording mode are used. This corresponds to a modification of the recording mode (FIG. 10).

The three types of recording methods according to the above-described first to third recording modes have respective advantages and disadvantages, and the recording mode can be selected based on the result of the above-mentioned (Equation 11), or the user can arbitrarily select the recording mode. It is useful for the user to select a recording mode or to use one of them according to conditions. A criterion for selecting any one of the first to third recording modes depends on one of the following items.

[0111] The n information signals are described above (Equation 11).
When it is determined whether or not recording is possible in different areas on the optical disc 13 in step (1), if it is determined in step (11) that recording is not possible, the number of information signals to be recorded is reduced and then (step (11)). ) Is determined, and if (Equation 11) is satisfied, the first recording mode is selected, and if it is determined to be impossible, the second or third recording mode is selected.

[0112] The user selects the first to third recording modes. That is, when the user arbitrarily selects, for example, when the first recording mode is selected, the above-described (1) is selected.
It is determined whether or not a plurality of information signals set in (Expression 1) can be recorded,
If recording is possible, the display indicates that the first to third recording modes are selectable, and recording is performed according to the selected input result. On the other hand, if recording is not possible, the second or third recording mode is displayed as selectable, and recording is performed according to the selected input result.

[0113] In the case of automatic selection according to the type of information signal or source, for example, n information signals are AV-EN
When the data is input from the DEC 20, the recording is performed in the first recording mode since the transfer rate at the time of compression can be set by the user. When the data is input as a transport stream signal as a compressed information signal from a digital satellite or the Internet, recording is performed in the second or third recording mode. In addition, recording can be performed according to user settings according to a difference between transfer rates of a plurality of information signals to be recorded, a channel position (for example, NHK and commercial broadcasting), a genre of information signals (movie, animation, education), and the like.

[0114] According to the specification of the information signal recording device or the information signal communication device, for example, when the device is connected to an AC power source and used in a stationary state, recording is performed in the first recording mode within the allowable range of the above (Equation 11). . Then, when this apparatus is disconnected from the AC power supply and used by battery driving, the second or third recording mode is selected. Further, in the case of a device in which the capacity of the track buffer memory 19 is removable and the capacity of the track buffer memory 19 can be changed, if the capacity of the track buffer memory 19 is large, the first recording mode is selected. If the capacity of the track buffer memory 19 is small, the second
Alternatively, the third recording mode is selected.

. The type of the optical disk 13 is detected by the system controller 22, and for example, D
If high-speed seek is possible like VD-RAM,
If a recording mode is selected and a seek takes some time like a DVD-RW, the second or third recording mode may be selected.

[0116] The management area on the optical disk 13 is reproduced, and the status of the recordable area of the optical disk 13 is determined by the system controller 22.
If the recording mode is selected and there are no free areas that can be continuously recorded for a predetermined time or more and there are scattered empty areas, the second or third recording mode may be selected.

It should be noted that selection can be made according to various specifications other than the above-mentioned items.

[0118]

As described above, according to the present invention, the maximum transfer capability of the information signal recording medium can be obtained, and the area of n information signals can be efficiently divided in the buffer memory. As a user, functions such as continuous reproduction, continuous recording, and continuous recording / reproduction of n information signals can be smoothly obtained, and the usability of the apparatus is improved. further,
The buffer memory provided in the device divides n areas for temporarily storing n information signals according to the value of each transfer rate of the n information signals, or
Since the n information signals are divided in accordance with the respective recording or reproducing modes, the efficiency of the buffer memory can be increased.

[Brief description of the drawings]

FIG. 1 shows information signal recording and / or recording according to a first embodiment of the present invention.
FIG. 3 is a block diagram for describing an overall configuration of a playback device.

FIG. 2 shows an information signal recording and / or recording method according to a first embodiment of the present invention.
Alternatively, in the reproducing apparatus, the first, second,.
,..., N in the track buffer memory and the first, second,.
.., And schematically show a state in which an n-th information signal is recorded and / or reproduced in a time-division manner by one optical pickup.

FIG. 3 is a diagram showing addresses of first, second,..., N-th areas (data areas) and an address of a management area on the optical disc.

FIG. 4 is a timing chart showing a state in which first to n-th information signals are reproduced from an optical disc by one optical pickup in a time-division manner.

FIG. 5 is a flowchart showing a state in which the first, second,..., N-th information signals are recorded on an optical disc by one optical pickup in a time-division manner.

FIG. 6 is a block diagram for explaining the overall configuration of the information signal communication device.

FIG. 7 is a diagram illustrating a first recording mode when the relational expression (11) is not satisfied in the information signal recording device or the information signal communication device according to the present invention.

FIG. 8 is a diagram for explaining a modification of the first recording mode when the relational expression (11) is not satisfied in the information signal recording device or the information signal communication device according to the present invention.

FIG. 9 is a diagram for explaining a second recording mode when the relational expression (11) is not satisfied in the information signal recording device or the information signal communication device according to the present invention.

FIG. 10 is a diagram illustrating a third recording mode when the relational expression (11) is not satisfied in the information signal recording device or the information signal communication device according to the present invention.

[Explanation of symbols]

Reference Signs List 10: information signal recording and / or reproducing device, 13: information signal recording medium (optical disk), 13a: first area, 13
b: first area, 13n: nth area, 14: head (optical pickup), 19: track / buffer memory, 19a: first area, 19b: first area, 19n
... n-th area, 20 ... audio / video / encoder / decoder (AV-ENDEC), 26a-26n ... input terminals, 30 ... information signal communication device, 31 ... ATAPI
Interface: 32 Host: 41 Antenna for receiving satellite broadcasting 42: Digital satellite decoder unit 44:
Stream converter, 45 ... Internet terminal.

Claims (3)

[Claims] 1. A means for rotating an information signal recording medium in which n information signals (where n is an integer of 2 or more) are recorded at n positions, respectively, and temporarily storing the n information signals. And a buffer memory that outputs the n information signals temporarily stored at respective transfer rates, and is provided movably in a radial direction of the information signal recording medium,
And reproducing the n information signals from the information signal recording medium in a time-division manner and transferring the n information signals to the buffer memory in a time-division manner at a transfer rate faster than that at the time of output from the buffer memory. At least one of the following heads, and the buffer memory absorbs a difference between a transfer rate of the head to the n information signals and a transfer rate of the n information signals output from the buffer memory. An information signal reproducing apparatus configured as described above, wherein a transfer rate of the head to the n information signals is:
Rp, a sum of transfer rates of the n information signals... ΣRn, a sum of reproduction information unit amounts of the n information signals.
n, the sum of each time required for the head to move from the current position to the next position on the information signal recording medium...
An information signal reproducing apparatus characterized by satisfying a relational expression of ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣRn) and reproducing the n information signals from the information signal recording medium in a time division manner. 2. A buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate, and n buffer memories for recording the n information signals, respectively. Means for rotating an information signal recording medium having a position, provided movably in a radial direction of the information signal recording medium,
And at least one head that records the n information signals read from the buffer memory at the n positions on the information signal recording medium in a time-division manner at a transfer rate faster than a respective transfer rate, An information signal recording device configured to absorb a difference between a transfer rate of the head to the n information signals and a transfer rate of the n information signals input to the buffer memory by the buffer memory. And a transfer rate of the head to the n information signals.
Rp, the sum of the transfer rates of the n information signals ... ΣRn, the sum of the recording information unit amounts of the n information signals ... ΣY
n, the sum of each time required for the head to move from the current position to the next position on the information signal recording medium...
An information signal recording apparatus that satisfies a relational expression of ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn) and records the n information signals from the buffer memory on the information signal recording medium in a time division manner. . 3. An information signal recording medium for recording and reproducing information for recording at least one information signal among n information signals (where n is an integer of 2 or more) and reproducing the remaining information signals. Means for temporarily storing the information signal of n, and a buffer memory for inputting and outputting an information signal for recording on the information signal recording medium and an information signal for reproduction at respective transfer rates; Provided movably in the radial direction of the information signal recording medium,
An operation of recording the information signal input to the buffer memory on the information signal recording medium at a transfer rate higher than the transfer rate of the signal; and an operation of recording the information signal reproduced from the information signal recording medium at a rate higher than the transfer rate of the signal. At least one head for performing an operation of transferring data to the buffer memory at a transfer rate in a time-division manner; and a transfer rate of the head to the n information signals and the n data input / output to / from the buffer memory. An information signal recording / reproducing device configured to absorb a difference between the transfer rate of the information signal and the transfer rate of the information signal by the head.
Rp, the sum of the transfer rates of the n information signals ... {Rn, the sum of the recording / reproducing information unit amounts of the n information signals ...}
Yn, the sum of each time required for the head to move from the current position to the next position on the information signal recording medium: ΔSn;
An information signal recording / reproducing apparatus which records and reproduces the n information signals on the information signal recording medium by satisfying a relational expression of ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn).