JP2001283513A - Reproducing device, recording device recording and reproducing device, communication equipment, and read- only recording medium for information signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information signal recording and/or reproducing device which records and/or reproduces (n) (n is an integer not less than 2) information signals of video information of motion pictures, etc., and sound information of pieces of music, etc., to and from an optical or magnetic information signal recording medium, etc., on a time-division basis through (n) buffer memories. SOLUTION: To absorb the difference between the transfer rate of (n) information signals by one pickup head 14 to the information recording medium 13 and the transfer rate of the (n) information signals in buffer memories 19, the (n) time-division information signals are transferred on the time-division basis to the one pickup head between the information signal recording medium and buffer so that ΣYn>=Rp×ΣRn×ΣSn/(Rp-Σn) holds, where Rp is the transfer rate of the (n) information signals by the one pickup head, Σn the sum of the transfer rates of the (n) information signals, ΣYn the sum of the capacity values of the (n) information signals, and ΣSn the sum of seek times required for the head to move from a current area to a next area on the information signal recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for 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 recording and / or reproducing apparatus which records and / or reproduces information or a magnetic or other information signal recording medium in a time-division manner by one pickup (or head) via 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-mentioned problems, and the first invention has n (where n
Means for rotating a read-only information signal recording medium in which information signals of (n is an integer of 2 or more) are respectively recorded in n areas in advance, and the n information signals are temporarily stored and temporarily stored. A buffer memory that outputs the stored n information signals at respective transfer rates; and a buffer memory that is movably provided in a radial direction of the information signal recording medium, and that transfers the n information signals from the information signal recording medium. Play in time division,
At least one head for transferring the n information signals to the buffer memory at a constant transfer rate faster than that at the time of output from the buffer memory in a time-division manner. An information signal reproducing apparatus configured to absorb a difference between a transfer rate and a transfer rate of each of the n information signals output from the buffer memory in the buffer memory, wherein the n pieces of information by the head are The transfer rate to the signal: Rp, the sum of the transfer rates of the n information signals: ΣRn, the sum of the capacities of the n information signals: ΣYn, the head being the current on the information signal recording medium Sum of seek times required for moving from one area to the next area... ΣSn, and ΣYn ≧ Rp × Σ
An information signal reproducing apparatus characterized by satisfying a relational expression of Rn × ΣSn / (Rp-ΣRn) and reproducing the n information signals from the information signal recording medium in a time-division manner.

A second invention provides a buffer memory for temporarily storing n (where n is an integer of 2 or more) information signals input at each transfer rate, and a buffer memory for storing the n information signals. Means for rotating an information signal recording medium on which n areas to be recorded are formed, and a means for movably provided in the radial direction of the information signal recording medium, and for transmitting the n information signals read from the buffer memory. At least one head for performing time-division recording on the n areas on the information signal recording medium at a constant transfer rate higher than the respective transfer rates, the transfer rate of the heads to the n information signals And an information signal recording device configured to absorb a difference between each transfer rate of the n information signals input to the buffer memory by the buffer memory. The transfer rate to the n information signals by ... Rp, the n sum of the transfer rates of the pieces of information signals ... ΣRn, said n sum of the capacity of the information signal ... ShigumaY
n, the sum of seek times required for the head to move from the current area to the next area on the information signal recording medium.
Sn, and ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−Σ
An information signal recording apparatus characterized in that the relational expression (Rn) is satisfied and the n information signals are recorded from the buffer memory on the information signal recording medium in a time-division manner.

In the third invention, n (where n is 2)
Means for recording at least one of the above information signals, and for rotating an information signal recording medium for recording and reproduction in which n areas are formed in order to reproduce the rest, and temporarily storing the n information signals. Buffer memory for storing information, and for inputting and outputting the information signal for recording and the information signal for reproduction to and from the information signal recording medium at respective transfer rates, and movably in the radial direction of the information signal recording medium. An operation of recording an information signal input to the buffer memory on the information signal recording medium at a constant transfer rate higher than a transfer rate of the signal; and transmitting an information signal reproduced from the information signal recording medium to the signal. And at least one head for performing an operation of transferring data to the buffer memory at a constant transfer rate higher than the transfer rate of the data in a time-division manner. An information signal recording / reproducing apparatus configured to absorb a difference between a transfer rate to a signal and a transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory. The transfer rate to n information signals: Rp, the sum of the transfer rates of the n information signals: ΣRn, the sum of the capacities of the n information signals: ΣYn, and the head is on the information signal recording medium. Sum of seek times required to move from the current area to the next area in... ΣSn, and ΣYn ≧ Rp × ΣR
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 n × ΣSn / (Rp-ΣRn).

In the fourth invention, n (where n is 2)
Means for rotating a read-only information signal recording medium in which information signals of the above (integer) are respectively recorded in n areas in advance, and the n information signals are temporarily stored and temporarily stored. A buffer memory that outputs the n information signals at respective transfer rates; and a buffer memory that is provided movably in a radial direction of the information signal recording medium, and time-divides the n information signals from the information signal recording medium. And at least one head for transferring the n information signals to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory in a time-division manner. An information signal reproducing device configured to absorb in the buffer memory the difference between the transfer rate to the information signal and the transfer rate of the n information signals output from the buffer memory. Rp, the sum of the transfer rates of the n information signals by the head ... Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, The allowable seek time required for the head to move from the current area to the next area on the information signal recording medium is S, and ΣYn ≧ Rp × ΣRn × n ×
An information signal reproducing apparatus, wherein the n information signals are reproduced in a time-division manner from the information signal recording medium by satisfying a relational expression of S / (Rp-ΣRn).

A fifth invention provides a buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate, and a buffer memory for storing the n information signals. Means for rotating an information signal recording medium on which n areas to be recorded are formed, and a means for movably provided in the radial direction of the information signal recording medium, and for transmitting the n information signals read from the buffer memory. At least one head for performing time-division recording on the n areas on the information signal recording medium at a constant transfer rate higher than the respective transfer rates, the transfer rate of the heads to the n information signals And an information signal recording device configured to absorb a difference between each transfer rate of the n information signals input to the buffer memory by the buffer memory. The transfer rate to the n information signals by ... Rp, the n sum of the transfer rates of the pieces of information signals ... ΣRn, said n sum of the capacity of the information signal ... ShigumaY
n, an allowable seek time required for the head to move from the current area to the next area on the information signal recording medium... S, and ΣYn ≧ Rp × ΣRn × n × S / (Rp−ΣRn)
And recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner.

In the sixth invention, n (where n is 2)
Means for recording at least one of the above information signals, and for rotating an information signal recording medium for recording and reproduction in which n areas are formed in order to reproduce the rest, and temporarily storing the n information signals. Buffer memory for storing information, and for inputting and outputting the information signal for recording and the information signal for reproduction to and from the information signal recording medium at respective transfer rates, and movably in the radial direction of the information signal recording medium. An operation of recording an information signal input to the buffer memory on the information signal recording medium at a constant transfer rate higher than a transfer rate of the signal; and transmitting an information signal reproduced from the information signal recording medium to the signal. And at least one head for performing an operation of transferring data to the buffer memory at a constant transfer rate higher than the transfer rate of the data in a time-division manner. An information signal recording / reproducing apparatus configured to absorb a difference between a transfer rate to a signal and a transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory. The transfer rate to n information signals: Rp, the sum of the transfer rates of the n information signals: ΣRn, the sum of the capacities of the n information signals: ΣYn, and the head is on the information signal recording medium. Allowable seek time required to move from the current area to the next area in... Sn, and ΣYn ≧ Rp × ΣRn × n
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 × S / (Rp−ΣRn).

In a seventh aspect of the present invention, n (where n is 2)
Means for rotating a read-only information signal recording medium in which information signals of the above (integer) are respectively recorded in n areas in advance, and the n information signals are temporarily stored and temporarily stored. A buffer memory that outputs the n information signals at respective transfer rates; and a buffer memory that is provided movably in a radial direction of the information signal recording medium, and time-divides the n information signals from the information signal recording medium. And at least one head for transferring the n information signals to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory in a time-division manner. An information signal reproducing device configured to absorb in the buffer memory the difference between the transfer rate to the information signal and the transfer rate of the n information signals output from the buffer memory. A transfer rate of the head to the n information signals, Rp, a sum of transfer rates of the n information signals, ΣRn, a capacity of the buffer memory, Ym, and the head records the information signal. Sum of seek times required for moving from the current area to the next area on the medium... ΣSn, Ym ≧ Rp × ΣRn × ΣSn /
An information signal reproducing apparatus, characterized by satisfying a relational expression of (Rp-ΣRn) and reproducing the n information signals from the information signal recording medium in a time-division manner.

An eighth invention provides a buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate, and a buffer memory for storing the n information signals. Means for rotating an information signal recording medium on which n areas to be recorded are formed, and a means for movably provided in the radial direction of the information signal recording medium, and for transmitting the n information signals read from the buffer memory. At least one head for performing time-division recording on the n areas on the information signal recording medium at a constant transfer rate higher than the respective transfer rates, the transfer rate of the heads to the n information signals And an information signal recording device configured to absorb a difference between each transfer rate of the n information signals input to the buffer memory by the buffer memory. Rp, the sum of the transfer rates of the n information signals, ΣRn, the capacity of the buffer memory, Ym, and the head is the current transfer rate on the information signal recording medium. Sum of seek times required to move from one area to the next area ... ΣSn,
An information signal recording device which satisfies a relational expression of Ym ≧ 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. It is.

The ninth invention is characterized in that n (where n is 2)
Means for recording at least one of the above information signals, and for rotating an information signal recording medium for recording and reproduction in which n areas are formed in order to reproduce the rest, and temporarily storing the n information signals. Buffer memory for storing information, and for inputting and outputting the information signal for recording and the information signal for reproduction to and from the information signal recording medium at respective transfer rates, and movably in the radial direction of the information signal recording medium. An operation of recording an information signal input to the buffer memory on the information signal recording medium at a constant transfer rate higher than a transfer rate of the signal; and transmitting an information signal reproduced from the information signal recording medium to the signal. And at least one head for performing an operation of transferring data to the buffer memory at a constant transfer rate higher than the transfer rate of the data in a time-division manner. An information signal recording / reproducing apparatus configured to absorb a difference between a transfer rate to a signal and a transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory. The transfer rate to n information signals: Rp, the sum of the transfer rates of the n information signals: ΣRn, the capacity of the buffer memory: Ym, and the head from the current area on the information signal recording medium. Sum of seek times required to move to the next area: ΣSn, Ym ≧ Rp × ΣRn × ΣSn /
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 (Rp-ｐRn).

A tenth aspect of the present invention provides a buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate, and a buffer memory for temporarily storing the n information signals. Means for rotating an information signal recording medium capable of forming n areas to be respectively recorded, and the n pieces of information provided movably in a radial direction of the information signal recording medium and read from the buffer memory At least one head for recording a signal in the n areas on the information signal recording medium in a time-division manner, a transfer rate to the n information signals by the head, and a signal input to the buffer memory. An information signal recording apparatus configured to absorb a difference between each transfer rate of n information signals and each transfer rate by said buffer memory, wherein said head transfers said n information signals to said n information signals. ... Rp, the sum of the transfer rates of the n information signals, .SIGMA.Rn, the sum of the capacities of the n information signals, .SIGMA.Yn, the head being the next area from the current area on the information signal recording medium. The sum of the seek times required for the movement... ΣSn, ΣYn ≧ Rp × ΣRn × ΣSn
When the relational expression of / (Rp-ΣRn) is satisfied, the n information signals read out from the buffer memory in a time-division manner are transferred to the n areas on the information signal recording medium via the head. If the above-mentioned relational expression is not satisfied, the number of information signals to be recorded is reduced to n ′ (where 2 ≦ n ′ <
n) information signals are selected, and it is determined whether or not the n ′ information signals satisfy the above relational expression again. If the n ′ information signals satisfy the above relational expression and are recordable, Wherein the n ′ information signals are recorded in a time-division manner on the n ′ areas on the information signal recording medium via the head.

An eleventh invention is characterized in that a buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate, and a buffer memory for storing the n information signals. Means for rotating an information signal recording medium capable of forming n areas to be respectively recorded, and the n pieces of information provided movably in a radial direction of the information signal recording medium and read from the buffer memory At least one head that records signals in the n areas on the information signal recording medium in a time-division manner, a transfer rate to the n information signals by the head, and a signal input to the buffer memory. An information signal recording device configured to absorb a difference between each transfer rate of n information signals and each transfer rate by said buffer memory, wherein a transfer rate to said n information signals by said head is provided. ... Rp, the sum of the transfer rates of the n information signals, .SIGMA.Rn, the sum of the capacities of the n information signals, .SIGMA.Yn, the head being the next area from the current area on the information signal recording medium. The sum of the seek times required for the movement... ΣSn, ΣYn ≧ Rp × ΣRn × ΣSn
When the relational expression of / (Rp-ΣRn) is satisfied, the n information signals read out from the buffer memory in a time-division manner are transferred to the n areas on the information signal recording medium via the head. If the above relational expression is not satisfied, the n information signals are recorded in the same area on the information signal recording medium via the head in a time division manner. It is an information signal recording device.

According to a twelfth aspect, in the information signal recording apparatus according to the eleventh aspect, the n information signals are time-divided into the same area on the information signal recording medium via the head. When recording, the n information signals are recorded in the order of time-division readout from the buffer memory, or the n information signals are temporarily stored in the buffer memory over a plurality of cycles. Rearranging the information signals in the buffer memory such that a plurality of cycles of each information signal become one lump, and recording the rearranged n information signals in a time-division read order. Is what you do.

In a thirteenth aspect, the present invention provides a buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate, and a buffer memory for storing the n information signals. Means for rotating an information signal recording medium capable of forming n areas to be respectively recorded, and the n pieces of information provided movably in a radial direction of the information signal recording medium and read from the buffer memory At least one head that records signals in the n areas on the information signal recording medium in a time-division manner, a transfer rate to the n information signals by the head, and a signal input to the buffer memory. An information signal recording device configured to absorb a difference between each transfer rate of n information signals and each transfer rate by said buffer memory, wherein a transfer rate to said n information signals by said head is provided. ... Rp, the sum of the transfer rates of the n information signals, .SIGMA.Rn, the sum of the capacities of the n information signals, .SIGMA.Yn, the head being the next area from the current area on the information signal recording medium. The sum of the seek times required for the movement... ΣSn, ΣYn ≧ Rp × ΣRn × ΣSn
Based on the relational expression of / (Rp- 分割 Rn), the n information signals read out from the buffer memory in a time division manner are divided into at least two or more areas on the information signal recording medium via the head. And a second recording mode in which the n information signals are time-divisionally recorded in the same area on the information signal recording medium via the head.
An information signal recording apparatus characterized by having a recording mode of (a) and (b), wherein the first recording mode and the second recording mode can be selected.

According to a fourteenth aspect, in the information signal recording apparatus according to the thirteenth aspect, the selection between the first recording mode and the second recording mode is determined by the type of the information signal to be recorded. Or, determined by the user's selection, determined by the specifications of the information signal recording device, or determined by the type of the information signal recording medium,
It is determined according to the condition of the recordable area of the information signal recording medium.

In a fifteenth aspect, the buffer memory provided in the device according to any one of the first to fourteenth aspects is characterized in that the buffer memory temporarily stores the n information signals, respectively. An information signal reproducing apparatus, an information signal recording apparatus, or an information signal recording / reproducing apparatus, wherein the area is divided according to a value of each transfer rate of the n information signals. .

In a sixteenth aspect, the buffer memory provided in the apparatus according to any one of the first to fourteenth aspects is characterized in that the buffer memory temporarily stores the n information signals respectively. Any one of an information signal reproducing device, an information signal recording device, and an information signal recording / reproducing device, wherein an area is divided according to a recording or reproducing mode of each of the n information signals. It is.

A seventeenth invention is characterized in that an interface for communication connection with the outside is provided on the output side of the buffer memory provided in the device according to any one of the first to sixteenth inventions. An information signal communication device.

Further, an eighteenth aspect of the present invention relates to a single movable head provided in the apparatus, in which n information signals (where n is an integer of 2 or more) are preliminarily recorded in n areas. And time-divisionally reproduces the n information signals, temporarily stores the n information signals at a fixed transfer rate in a buffer memory in the device, and transfers the n information signals to the n information signals by the head. A read-only information signal recording medium formed so that a difference between a rate and a transfer rate of each of the n information signals output from the buffer memory is absorbed by the buffer memory so that the n information signals can be reproduced. And
Transfer rate to the n information signals by the head ...
Rp, the sum of the transfer rates of the n information signals,.
n, the sum of the capacities of the n information signals... ΣYn, the sum of the seek times required for the head to move from the current area to the next area on the information signal recording medium. × Rp × ΣSn × T / (Rp-ΣRn)
Is a read-only information signal recording medium formed so as to satisfy the following relational expression:

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of 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 according to the present invention will be described below with reference to FIGS. <First embodiment>, <Second embodiment>, <
Third Embodiment> will be described in order.

<First Embodiment> In an information signal recording and / or reproducing apparatus according to a first embodiment of the present invention, a DVD-RAM, DVD-RW, DVD + R is used as an information signal recording medium.
It can be applied to optical disks such as W, magnetic disks such as hard disks and floppy (registered trademark) disks, and solid-state memory devices using semiconductors.
In the following embodiments, a case where an optical disc 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 according to a first embodiment of the present invention.

As shown in FIG. 1, in an information signal recording and / or reproducing apparatus (optical disc player) 10 according to a first embodiment of the present invention, an optical disc (information A signal recording medium 13 is rotatably 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. .

The system controller 2 issues a command to start recording and / or reproduction by selecting a plurality of keys 23.
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.

The reproduction signal read from the optical pickup 14 with one correction block as the minimum unit is used to optimize the frequency characteristics of the reproduction signal by the preamplifier 16 by using an equalizer, to apply PLL, and to apply the PLL bit clock and The system controller 22 has an A / D converter which measures the jitter value generated by comparing the data with respect to the time axis.

The signal is converted into a digital signal by the signal processing circuit 18 and, for example, synchronization is detected.
3 is decoded into NRZI data, and error correction is performed in units of correction blocks. The address signal of the sector and the first, second,..., N-th (n is an integer of 2 or more) described later Information signal is obtained. 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 megabyte (DRAM) DRAM, and the time axis of the variable transfer rate of the first, second,... N-th 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 a decoder in 20), and the audio signal and the video signal are separated into audio signals through an NTSC encoder 24. 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,..., N-th 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 expansion speed 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 expansion is performed in accordance therewith. 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 is controlled by the CLV based on 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.

In order to set the resolution of an image to be recorded, a high-speed scene such as a car race, or to set the recording time, priority is given to key input or external control data in the 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, the information signal recording and / or
Alternatively, in the reproducing apparatus 10, the first
Second,..., N-th regions 13a, 13b,.
, The first, second,... In the track buffer memory 19.
.., N-th areas 19a, 19b,. This will be described with reference to FIG.

FIG. 2 shows the information signal recording and / or reproducing apparatus according to the first embodiment of the present invention, in which the first, second,... ,..., N-th information signals are recorded and / or reproduced by one optical pickup in a time-division manner. FIG. In FIG. 2, illustration of a preamplifier and a signal processing circuit is omitted for easy understanding. FIG. 3 shows the first, second,.
FIG. 9 is a diagram showing an address of an n-th area (data area) and an address of a management area.

As shown in FIG. 2, a first area 13a on the optical disk 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 that is the minimum unit of recording and reproduction (for example, the address N in FIG.
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 in which a seek time, which will be described later, can be maintained. A2, A3,... Are added 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 disc 13 is also divided into a plurality of pieces within a range in which a seek time described later can be protected, 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 the 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,. On the other hand, if they are recorded,
.., N-th information signals A, B,. 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
4, the first, second,..., N-th information signals A, B,.
, N, the transfer rate Rp is set to be constant, and the 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 of B,..., N are set to values faster than the transfer rates Ra, Rb,.

The track / buffer memory 19 and A
The first, second,..., N-th information signals A, B,..., N are transferred to and from the V-ENDEC 20. At this time, the transfer rate of the first information signal A is set to the transfer rate. 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 with a recording rate of 2 Mbps at a transfer rate for high image quality, for example, 8 Mbps
. A mode with a recording rate of 4 hours, for example, 4 Mbps at a transfer rate for a slightly higher image quality,. Three modes, for example, a mode of recording time of 8 Mbps at 2 Mbps at a transfer rate for normal image quality, are prepared, and when recording on the optical disc 13, the modes are designated by a key input by the user, whereby 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 out from the control data recorded in association with the information signals A, B,. A, B,..., N transfer rates Ra, Rb,.
It is assumed that n is set.

Also, the system controller 22 shown in FIG. 1 controls the first, second,...
a, 19b,..., 19n are transferred at the first, second,..., n-th information signals A, B,.
.., Rn are divided and set according to the value of Rn.
a, 19b,..., 19n contain an EMPTY value indicating that the storage capacity is empty and a FULL value indicating that the storage capacity is full, the first, second,. …,
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 embodiment, as described above, the first, second,..., N-th information signals A, B,.
, Rn of each area 19a, 19b,
.., 19n are not divided but divided according to the recording mode or the reproduction mode. For example, assuming that n information signals A, B,... N have the same transfer rate,
The playback signal does not pose a major problem even if the continuity of playback is slightly impaired during playback.However, if the recording signal cannot be recorded continuously, it will be a fatal defect. A large area is occupied in the 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.

The above-mentioned information signal recording and / or
Alternatively, in the playback device 10,. 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
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 disc 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 nth 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)... The recording capacity of the nth information signal N recorded on the nth area 13n 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 from the second region 13b to the third region 13c, and similarly, Sn (= Sna) is 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 (1), 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 disk 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 or 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).

The recording time or reproduction time Ta (s) in which the optical pickup 14 records or reproduces the first information signal A is Ta = Ya / Rp (Equation 2). The recording time or the reproduction time Tb (s) for recording or reproducing the information signal B is Tb = Yb / Rp (formula 3). The recording or reproducing time Tn (s) for recording or reproducing is Tn = Yn / Rp (Equation 4).

Also, the transfer rate Rp of the optical pickup 14 to the first, second,..., N-th information signals A, B,.
.., N-th information signals 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 correspond to one cycle period from the time of recording or recording / reproducing the first information signal A to the time of recording / reproducing 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) is equal to the ratio of the above equation (6), 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) × (S1 + S2... + Sn) / (Rp− 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,.
.., N-th information signals A, B,.
a, Rb,..., Rn are set to a fixed transfer rate faster than Rn. On the other hand, the transfer rates Ra, Rb, ..., Rn of the first, second, ..., n-th information signals A, B, ..., N
Is determined by the setting of the user at the time of recording, and is determined by the recording state recorded on the optical disc 13 at the time of 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 relation stably, continuous recording or recording / reproduction is required. , 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-mentioned 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 a time, is given by ΣSn = n × S (Equation 12), substituting (Equation 12) into (Equation 11) gives: ΣYn ≧ Rp × ΣRn × n × S / (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,..., N-th information signals A, B,. , Yn, or the recording time or reproduction time Ta, Tb,..., Tn is the above (10).
If the expressions (11, 13) and (14 to 16) are not satisfied, the continuity of recording or recording / reproducing of the information signals A, B,..., N is lost. In short, when recording or recording or 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 continuously performed even at a remote position. In addition, the above (Equations 10, 11, 13) and (Equations 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 disc 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.

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.

As 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 by 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,. It is reproduced in a time-division manner by a pickup.

Here, the optical disk 13 is formed only for reproduction, and a first information signal A having a recording capacity Ya is previously recorded in the first area 13a on the optical disk 13 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 an 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 the sake of illustration, but the same tendency is exhibited even when both 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. 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) sets the EMPTY value of the first area 19a in the track / buffer memory 19 and 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.
The first information signal A increases while increasing at a slope of a difference (Rp-Ra) between the transfer rate Rp written to 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 moves to the optical disk 1
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 to the AV-ENDEC 20 side 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 disc 13 is 1.5 sec.
Within seconds.

Next, the optical pickup 14 is mounted on the optical disc 1
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 memory 19 is
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 at which data is written to 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. While increasing, the second information signal B is shifted to the second region 19.
b is temporarily stored.

Next, the second information signal B stored in the second area 19b in the track buffer memory 19 is
When the LL value is reached, the optical pickup 14 moves to the optical disk 1
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 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 operation is repeated in the same manner. 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 information signal reproducing apparatus satisfies the above-described equations (1) to (18) in the reproducing operation, 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,..., N-th information signals input to the first, second,. A, B,..., N are converted into first,
The 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 disk 13 is formed so as to be recordable / reproducible. On the optical disk 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 disk 13.

When recording on the optical disc 13, the AV
The MPEG encoder in the ENDEC 20 operates in 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, 1
When the capacity in 9b, ..., 19n becomes FULL value,
The first, second,..., N-th information signals A, B,. , Read 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 disc 13 is started, the optical pickup 14 reproduces the management area 13c on the optical disc 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)
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 memory 19 is changed to EM.
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 disk 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 in the second area 19b of the track buffer memory 19 at the transfer rate Rb until reaching 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.

After that, the second information signal B stored in the second area 19b in the track buffer memory 19 becomes E
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 when 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 in the second address area B2 in the second area 13b, as is apparent from FIG. good.

Next, the optical pickup 14 moves to an area on the optical disk 13 to be recorded next, and the same is repeated in the same manner, so that the optical pickup 14 moves to the address area N1 of the n-th area 13n on the optical disk 13. n information signals 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. The seek operation Sn of the optical pickup 14 may be 1.5 seconds or less at the maximum in this case.

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 Embodiment> FIG. 6 is a block diagram for explaining the overall configuration of an information signal communication apparatus according to a second embodiment of the present invention. For convenience of description, 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 of the second embodiment will focus on the differences from the first embodiment.

While the information signal recording and / or reproducing apparatus 10 of the first embodiment described above is an optical disk player for compressing and expanding video signals and audio signals,
The information signal communication device 30 according to the second embodiment of the present invention shown in FIG. 6 has a configuration of an optical disk drive having no compression / decompression block, and an output side of a track buffer memory 19 provided in the optical disk drive. An ATAPI interface 31 for communication connection with the outside is provided, and a host 32 and a compression / decompression block of an AV-ENDEC (audio / video / encoder / decoder) 20 are connected to the outside as a host computer. And a plurality of information signals received by the satellite broadcast receiving antenna 41 and decoded in the digital satellite decoder unit 42 or a plurality of information signals from the Internet terminal 45 are compressed via the SW 43 and the stream conversion unit 44. Connected to the ATAPI interface 31 so that input is possible. And a point that it is different, other portions are the same as in the first embodiment. The above optical disk drive is the same as the information signal recording and / or reproducing apparatus 10 of the first embodiment except that the AV-ENDEC 20, buffer memory 21, and key 23 are 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 first embodiment described above, the first and the first data input during recording by the optical disc player 10 are used.
The second,..., N-th information signals A, B,..., N are analyzed to determine the respective transfer rates Ra, Rb,. 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 embodiment of the present invention, since the optical disk drive does not have a key input unit or a decode unit for control data from the optical disk 13, the first and second data to be recorded at the time of recording are not included. 2, ..., n-th
, N transfer rates Ra, Rb,.
.., Rn are input from the host via an I / F block in the ATAPI interface 31.

At this time, in the case of a recording process, for example, when a video signal having a transfer rate of 2 Mbps is input, 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 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 embodiment for performing communication has been described using the TAPI interface 31 for performing communication connection with the outside, a standard such as IEEE1394 may be used.
Communication using radio waves or light other than communication using such a cable may also be used. The signals to be recorded and reproduced are
Although video data was mainly explained, audio and music data
Needless to say, it may be a still image, a sub-picture, or a decoded signal obtained by decoding these. 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,... And / or when reproducing, each information signal A, B,.
…, N are prioritized according to their importance,
The transfer rate changes during recording and / or playback,
If a seek error or the like occurs at the time of seeking and the information signals A, B,..., N are not continuous because of the outside of the range of the above expression, the information signal having a lower priority may be truncated.
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,... And the reproduction after recording becomes effective.

Furthermore, by modifying a part of the information signal recording and / or reproducing apparatus 10 of the first embodiment or a part of the information signal communication apparatus 30 of the second embodiment, Optical disk rotating means 11, 1 as D side
2, an optical pickup 14, a driver circuit 15, a preamplifier 16, and a servo circuit 17 are provided as a unit, while a signal processing circuit 18, a track / buffer memory 19, and a system controller 22 are provided as a unit as a solid memory M side. The memory M may be detachably connected to the optical disk drive D and the ATAPI interface 31 by connecting a connector (not shown).
At this time, the capacity of the track buffer memory 19 is 64 M
B (64 megabytes), audio signals can be reproduced for about 1 hour, and video signals can be reproduced for about 10 minutes.

<Third Embodiment> FIG. 7 shows an information signal recording apparatus or information signal communication apparatus according to the present invention (Equation 11).
FIG. 8 is a diagram for explaining a first recording mode in a case where the relational expression (11) is not satisfied. FIG. 9 is a diagram for explaining a modification of the first recording mode. FIG. 9 illustrates a second recording mode when the relational expression (11) is not satisfied in the information signal recording apparatus or the information signal communication apparatus according to the present invention. FIG. 10 shows an information signal recording device or an information signal communication device according to the present invention.
FIG. 11 is a diagram for explaining a third recording mode when the relational expression (1) is not satisfied.

As described above, the information signal recording device or the information signal communication device according to the present invention uses
The second,..., N-th information signals A, B,.
, 19n are temporarily stored, and information signals A, B,..., N are read out from the track buffer memory 19 in a time-division manner, and these information signals A, B,. Each area 13a on the optical disk 13 is
.., 13n in a time-division manner, it is necessary to satisfy the relational expression (Equation 11) described above. This determination is made by the system controller 22. However, the case where the relational expression (11) cannot be satisfied naturally occurs.

Therefore, in the third embodiment, in the information signal recording device described in the first embodiment or the information signal communication device described in the second embodiment, the structure of the optical disk 13 and the structure of the track buffer memory 19 are different. , But input n information signals (information signals A, B,...).
.., N) on the optical disc 13, when it is determined that the seek time is not enough to record the n information signals by the optical pickup 14 in different areas on the optical disc 13 in a time-division manner, As described earlier (1
In the case where the relational expression (1) 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 ≦
n ′ <n) information signals are selected, and it is determined whether the relational expression (11) is satisfied again with respect to the n ′ information signals, 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 difference between the transfer rates of the n ′ information signals, the position of the channel (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.

More specifically, the first recording mode will be described.
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 to the optical disk 13 by the optical pickup 14 and the seek time satisfy Expression (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 the respective areas 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 device 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)
When 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 information 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, 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 modification 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 that may be divided into blocks 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, when the input n information signals (information signals A, B,..., N) do not satisfy the relational expression (11), the n information signals After being temporarily stored in the track buffer memory 19,
The n information signals are read out from the buffer memory 19 in a time-division order in the transfer order, and all the n information signals are recorded in the same area (one area) on the optical disc 13 by the optical pickup 14.

More specifically, the second recording mode will be described.
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 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 rearranging the data.

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 in which they are read.
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 reproduction stability may be lacking. However, unlike the first recording mode, subsequent management of recording is not complicated. In addition, 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 rearranged and put together in 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 four types of input 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 denoted by A1, A2, B1, B2, C1, C
.., D1, D2,..., One data unit is rearranged into a large unit block, and time-divisionally read out for each rearranged information signal block.
2), (B1, B2), (C1, C2), (D1, D
2) Recording is performed in the area A 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 during reproduction, and in the range of continuous recording units, special reproduction such as fast forward and skip is performed. 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-mentioned first to third recording modes, two recording modes can be roughly divided, and
In the first recording mode, the n information signals are recorded on 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 disc 13 without any intervening seek, and the second recording mode (FIG. 9) and the third 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 according to 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.

[0128] 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 (3), if it is determined in (Equation 11) that recording is not possible, the number of information signals to be recorded is reduced and again (Equation 11). ) Is determined, and if (Expression 11) is satisfied, the first recording mode is selected. If it is determined that the recording is not possible, the second or third recording mode is selected.

[0129] 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, when the user selects (1)
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.

[0130] 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 a user's setting according to a difference between transfer rates of a plurality of information signals to be recorded, a channel position (for example, NHK (registered trademark) and commercial broadcasting), a genre of information signals (movie, animation, education), and the like. it can.

[0131] 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.

[0132] 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.

[0133] 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.

[0135]

As described in detail above, according to the information signal reproducing apparatus, the information signal recording apparatus, the information signal recording / reproducing apparatus and the information signal communication apparatus according to the present invention, the first, second,. The information signal recording medium for recording and / or reproducing the information signal in the first, second,..., N-th areas, and the first, second,. When a time-division transfer at a constant transfer rate faster than the respective transfer rates is performed by a single head movable in the radial direction of the information signal recording medium with respect to a buffer memory for temporarily storing the information signal recording medium, Transfer rate to n information signals: Rp, sum of transfer rates of n information signals: ΣRn, sum of capacities of n information signals: ヘ ッ ド Yn, head is the current on the information signal recording medium Each system required to move from one area to the next Sum of the working hours ... ΣSn
Since the relational expression of ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣRn) is satisfied, the maximum transfer capability of the information signal recording medium can be obtained, and
It is possible to efficiently divide the area of the n information signals in the buffer memory, and to smoothly obtain the functions of continuous reproduction, continuous recording, or continuous recording / reproduction of the n information signals as a user. Things.

Further, the transfer rate of one head to n information signals: Rp, the sum of the transfer rates of the n information signals: ΔRn, the sum of the capacities of the n information signals: ΔY
n, an allowable seek time required for the head to move from the current area to the next area on the information signal recording medium...
Since the relational expression of Yn ≧ Rp × ΣRn × n × S / (Rp−ΣRn) is satisfied, the same effect as described above can be obtained.

Further, the transfer rate to n information signals by one head: Rp, the sum of the transfer rates of the n information signals: ΔRn, the capacity of the buffer memory: Ym, and the head is mounted on the information signal recording medium. Sum of seek times required to move from the current area to the next area of the area... ΣSn and Ym
Since the relational expression of ≧ Rp × ΣRn × ΣSn / (Rp−ΣRn) is satisfied, the same effect as described above can be obtained.

According to the information signal recording device and the information signal communication device of the present invention, the first, second,..., N-th information signals are stored in the first, second,. Record and / or
Alternatively, between the information signal recording medium to be reproduced and the buffer memory for temporarily storing the first, second,..., N-th information signals at the respective transfer rates, in the radial direction of the information signal recording medium. When transferring in a time-division manner at a fixed transfer rate faster than each transfer rate by one movable head, the transfer rate to n information signals by one head: Rp, each transfer of n information signals Sum of rates ...
ΣRn, the sum of the capacities of the n information signals ... ΣYn, the sum of the seek times required for the head to move from the current area to the next area on the information signal recording medium 記録 Sn,
When the relational expression of Yn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn) is satisfied, n information signals read out from the buffer memory in a time-division manner are transferred to the n areas on the information signal recording medium via the head. When the above relational expression is not satisfied, the number of information signals to be recorded is reduced from n information signals to n ′ (where 2 ≦ n ′ <
n) information signals are selected, and it is determined whether or not the n ′ information signals satisfy the above relational expression again. If n ′ information signals satisfy the above relational expression and are recordable, The n ′ information signals are transferred to the n ′ information signals on the information signal recording medium via the head.
If the above relational expression is not satisfied, the n information signals are recorded in the same area on the information signal recording medium via the head in a time-division manner. Therefore, measures to be taken when the above relational expression is not satisfied become clear, and the usability of the information signal recording device and the information signal communication device is improved.

Further, according to the information signal recording device and the information signal communication device according to the present invention, the first, second,..., Nth information signals are stored in the first, second,. Record and / or
Alternatively, between the information signal recording medium to be reproduced and the buffer memory for temporarily storing the first, second,..., N-th information signals at the respective transfer rates, in the radial direction of the information signal recording medium. When transferring in a time-division manner at a fixed transfer rate faster than each transfer rate by one movable head, the transfer rate to n information signals by one head: Rp, each transfer of n information signals Sum of rates ...
ΣRn, the sum of the capacities of the n information signals ... ΣYn, the sum of the seek times required for the head to move from the current area to the next area on the information signal recording medium 記録 Sn,
Based on the relational expression of Yn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn), n information signals read out from the buffer memory in a time-division manner into at least two or more areas on the information signal recording medium via the head. The first recording mode has a first recording mode in which time-division recording is performed, and a second recording mode in which n information signals are recorded in the same area on the information signal recording medium via a head in a time-division manner. Recording mode and the second recording mode can be selected. Therefore, the selection of the first or second recording mode is determined by the type of the information signal to be recorded, by the user, or by the information signal. It is possible to select either to determine according to the specification of the recording device, to determine according to the type of the information signal recording medium, or to determine according to the condition of the recordable area of the information signal recording medium. The response when the relational expression is not satisfied becomes clear, and the usability of the information signal recording device and the information signal communication device is improved.

The buffer memory provided in any one of the information signal reproducing device, the information signal recording device, the information signal recording / reproducing device and the information signal communication device temporarily stores n information signals. Since the n areas are divided according to the value of each transfer rate of the n information signals, or divided according to the recording or reproduction mode of each of the n information signals, the efficiency of the buffer memory is reduced. Can be enhanced.

Further, according to the read-only information signal recording medium of the present invention, n information signals are pre-recorded in n areas respectively, and n information signals are provided by one movable head provided in the apparatus. Time information signals are reproduced in a time-division manner and n information signals are temporarily stored in a buffer memory in the apparatus at a fixed transfer rate, and the transfer rate to the n information signals by the head and output from the buffer memory The buffer memory absorbs the difference between the transfer rates of the n information signals and the transfer rate of the n information signals to form the read-only information signal recording medium so that the n information signals can be reproduced. Transfer rate to Rp, the sum of the transfer rates of the n information signals ... ｎRn, the sum of the capacities of the n information signals ... ΣY
n, the sum of seek times required for the head to move from the current area to the next area on the information signal recording medium... ΣSn
ΣYn ≧ n × Rp × ΣSn × T / (Rp−ΣR
Since it is formed so as to satisfy the relational expression of n), n information signals can be efficiently arranged in the read-only information signal recording medium.

[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 illustrating an overall configuration of an information signal communication device according to a second embodiment of the present invention.

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 (18)

[Claims] 1. A means for rotating a read-only information signal recording medium in which n information signals (where n is an integer of 2 or more) are preliminarily recorded in n areas, respectively. Buffer memory for temporarily storing and outputting the n information signals temporarily stored at the respective transfer rates, and provided movably in the radial direction of the information signal recording medium,
And reproducing the n number of information signals from the information signal recording medium in a time-division manner, and time-dividing the n number of information signals into the buffer memory at a constant transfer rate faster than that at the time of output from the buffer memory. At least one head that transfers the information signals in the buffer memory. The difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals output from the buffer memory is determined by the buffer memory. An information signal reproducing device configured to absorb, the transfer rate of the head to the n information signals.
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Sum of seek times required for movement ... ΣSn
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣR
An information signal reproducing apparatus, which satisfies the relational expression (n) and reproduces 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 the information signal recording medium in which the area is formed, provided movably in the radial direction of the information signal recording medium,
And at least one head that records the n information signals read from the buffer memory in the n areas on the information signal recording medium in a time-division manner at a constant transfer rate faster than the respective transfer rates. An information signal recording device configured to absorb in 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 input to the buffer memory. A transfer rate to the n information signals by the head.
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Sum of seek times required for movement ... ΣSn
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣR
n) from the buffer memory satisfying the relational expression of n)
An information signal recording apparatus for recording information signals in a time-division manner on the information signal recording medium. 3. An information signal recording medium for recording / reproducing wherein at least one of n (where n is an integer of 2 or more) information signals is recorded and n regions are formed for reproducing the rest. Means for rotating; and 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. Provided movably in the radial direction of the information signal recording medium,
And an operation of recording the information signal input to the buffer memory on the information signal recording medium at a constant 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 transfer rate of the signal. At least one head for performing an operation of transferring data to the buffer memory at a higher fixed transfer rate in a time-division manner; a transfer rate to the n information signals by the head; and input / output to / from the buffer memory. An information signal recording / reproducing apparatus configured to absorb a difference between the transfer rate of the n information signals and the transfer rate of the n information signals, wherein a transfer rate to the n information signals by the head is:
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Sum of seek times required for movement ... ΣSn
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣR
n) and the information signal recording medium satisfies the relational expression of n).
An information signal recording / reproducing apparatus for recording / reproducing individual information signals. 4. A means for rotating a read-only information signal recording medium in which n information signals (where n is an integer of 2 or more) are previously recorded in n areas, respectively, Buffer memory for temporarily storing and outputting the n information signals temporarily stored at the respective transfer rates, and provided movably in the radial direction of the information signal recording medium,
And reproducing the n number of information signals from the information signal recording medium in a time-division manner, and time-divisionally reproducing the n number of the information signals in the buffer memory at a constant transfer rate faster than when outputting from the buffer memory At least one head that transfers the information signals in the buffer memory. The difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals output from the buffer memory is determined by the buffer memory. An information signal reproducing device configured to absorb, the transfer rate of the head to the n information signals.
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Allowable seek time required for movement: S, Σ
An information signal reproducing apparatus, wherein the n information signals are reproduced in a time division manner from the information signal recording medium by satisfying a relational expression of Yn ≧ Rp × ΣRn × n × S / (Rp−ΣRn). 5. A buffer memory for temporarily storing n (where n is an integer of 2 or more) information signals input at each transfer rate, and n buffer memories for recording the n information signals, respectively. Means for rotating the information signal recording medium in which the area is formed, provided movably in the radial direction of the information signal recording medium,
And at least one head that records the n information signals read from the buffer memory in the n areas on the information signal recording medium in a time-division manner at a constant transfer rate faster than the respective transfer rates. An information signal recording device configured to absorb in 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 input to the buffer memory. A transfer rate to the n information signals by the head.
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Allowable seek time required for movement: S, Σ
An information signal which satisfies a relational expression of Yn ≧ Rp × 分割 Rn × n × S / (Rp-ΣRn) and records the n information signals from the buffer memory on the information signal recording medium in a time-division manner. Recording device. 6. An information signal recording medium for recording / reproducing, wherein at least one of n (where n is an integer of 2 or more) information signals is recorded and n regions are formed for reproducing the rest. Means for rotating; and 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. Provided movably in the radial direction of the information signal recording medium,
And an operation of recording the information signal input to the buffer memory on the information signal recording medium at a constant 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 transfer rate of the signal. At least one head for performing an operation of transferring data to the buffer memory at a higher fixed transfer rate in a time-division manner; a transfer rate to the n information signals by the head; and input / output to / from the buffer memory. An information signal recording / reproducing apparatus configured to absorb a difference between the transfer rate of the n information signals and the transfer rate of the n information signals, wherein a transfer rate to the n information signals by the head is:
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Allowable seek time required for movement: Sn
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 × n × S / (Rp-ΣRn). 7. A means for rotating a read-only information signal recording medium in which n information signals (where n is an integer of 2 or more) are preliminarily recorded in n areas, respectively. Buffer memory for temporarily storing and outputting the n information signals temporarily stored at the respective transfer rates, and provided movably in the radial direction of the information signal recording medium,
And reproducing the n number of information signals from the information signal recording medium in a time-division manner, and time-dividing the n number of information signals into the buffer memory at a constant transfer rate faster than that at the time of output from the buffer memory. At least one head that transfers the information signals in the buffer memory. The difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals output from the buffer memory is determined by the buffer memory. An information signal reproducing device configured to absorb, the transfer rate of the head to the n information signals.
Rp, the sum of the transfer rates of the n information signals ... Rn, the capacity of the buffer memory ... Ym, each seek time required for the head to move from the current area to the next area on the information signal recording medium. Sum of ... Sn
Ym ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
An information signal reproducing apparatus that reproduces the n information signals from the information signal recording medium in a time-division manner by satisfying the following relationship: 8. A buffer memory for temporarily storing n (where n is an integer of 2 or more) information signals inputted at each transfer rate, and n buffer memories for recording said n information signals, respectively. Means for rotating the information signal recording medium in which the area is formed, provided movably in the radial direction of the information signal recording medium,
And at least one head that records the n information signals read from the buffer memory in the n areas on the information signal recording medium in a time-division manner at a constant transfer rate faster than the respective transfer rates. An information signal recording device configured to absorb in 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 input to the buffer memory. A transfer rate to the n information signals by the head.
Rp, the sum of the transfer rates of the n information signals ... Rn, the capacity of the buffer memory ... Ym, each seek time required for the head to move from the current area to the next area on the information signal recording medium. Sum of ... Sn
Ym ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
An information signal recording apparatus for recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner, satisfying the following relationship: 9. An information signal recording medium for recording / reproducing wherein at least one of n (where n is an integer of 2 or more) information signals is recorded and n regions are formed for reproducing the rest. Means for rotating; and 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. Provided movably in the radial direction of the information signal recording medium,
And an operation of recording the information signal input to the buffer memory on the information signal recording medium at a constant 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 transfer rate of the signal. At least one head for performing an operation of transferring data to the buffer memory at a higher fixed transfer rate in a time-division manner; a transfer rate to the n information signals by the head; and input / output to / from the buffer memory. An information signal recording / reproducing apparatus configured to absorb a difference between the transfer rate of the n information signals and the transfer rate of the n information signals, wherein a transfer rate to the n information signals by the head is:
Rp, the sum of the transfer rates of the n information signals ... Rn, the capacity of the buffer memory ... Ym, each seek time required for the head to move from the current area to the next area on the information signal recording medium. Sum of ... Sn
Ym ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
An information signal recording / reproducing apparatus which records and reproduces the n information signals on the information signal recording medium by satisfying the following relationship: 10. A buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) inputted at each transfer rate, and n buffer memories for recording the n information signals, respectively. Means for rotating an information signal recording medium capable of forming an area, provided movably in a radial direction of the information signal recording medium,
And at least one head for recording the n information signals read out from the buffer memory in the n areas on the information signal recording medium in a time-division manner, wherein the n information signals by the head are provided. An information signal recording device configured to absorb a difference between a transfer rate to the buffer memory and a transfer rate of each of the n information signals input to the buffer memory by the buffer memory, wherein: The transfer rate to the information signal ...
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Sum of seek times required for movement ... ΣSn
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣR
If the relational expression n) is satisfied, the n information signals read out from the buffer memory in a time division manner are recorded in the n area on the information signal recording medium through the head in a time division manner. On the other hand, if the above relational expression is not satisfied, the number of information signals to be recorded is reduced from the n information signals to select n ′ (where 2 ≦ n ′ <n) information signals. It is determined whether or not the n ′ information signals satisfy the relational expression again. If the n ′ information signals satisfy the relational expression and are recordable, the n ′ information signals are recorded. To n ′ on the information signal recording medium via the head.
An information signal recording apparatus for recording data in a plurality of areas in a time-division manner. 11. A buffer memory for temporarily storing n (where n is an integer of 2 or more) information signals inputted at each transfer rate, and n buffer memories for recording said n information signals, respectively. Means for rotating an information signal recording medium capable of forming an area, provided movably in a radial direction of the information signal recording medium,
And at least one head for recording the n information signals read out from the buffer memory in the n areas on the information signal recording medium in a time-division manner, wherein the n information signals by the head are provided. An information signal recording device configured to absorb a difference between a transfer rate to the buffer memory and a transfer rate of each of the n information signals input to the buffer memory by the buffer memory, wherein: The transfer rate to the information signal ...
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Sum of seek times required for movement ... ΣSn
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣR
If the relational expression n) is satisfied, the n information signals read out from the buffer memory in a time division manner are recorded in the n area on the information signal recording medium through the head in a time division manner. On the other hand, when the above relational expression is not satisfied, the information signal recording apparatus records the n information signals in the same area on the information signal recording medium via the head in a time-division manner. . 12. When the n information signals are recorded in the same area on the information signal recording medium in a time-division manner via the head, the n information signals are time-divided from the buffer memory. And record them in the order in which they were read, or
After temporarily storing the n information signals in the buffer memory for a plurality of cycles, the plurality of cycles of each information signal are rearranged in the buffer memory such that each of the plurality of cycles becomes a unit. 12. The information signal recording apparatus according to claim 11, wherein the n information signals are recorded in a time-division read order. 13. A buffer memory for temporarily storing n information signals (where n is an integer of 2 or more) inputted at each transfer rate, and n buffer memories for recording said n information signals, respectively. Means for rotating an information signal recording medium capable of forming an area, provided movably in a radial direction of the information signal recording medium,
And at least one head for recording the n information signals read out from the buffer memory in the n areas on the information signal recording medium in a time-division manner, wherein the n information signals by the head are provided. An information signal recording device configured to absorb a difference between a transfer rate to the buffer memory and a transfer rate of each of the n information signals input to the buffer memory by the buffer memory, wherein: The transfer rate to the information signal ...
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Sum of seek times required for movement ... ΣSn
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣR
n) recording the n information signals read out from the buffer memory in a time division manner into at least two or more areas on the information signal recording medium via the head based on the relational expression of n). 1 recording mode, and a second recording mode in which the n information signals are recorded in the same area on the information signal recording medium in a time-division manner via the head. And an information signal recording device, wherein the information recording device is capable of selecting the second recording mode. 14. The selection of the first recording mode and the second recording mode is determined by the type of the information signal to be recorded, by the user, or by the specifications of the information signal recording device. 14. The information signal recording apparatus according to claim 13, wherein the information signal recording medium is determined based on a type of the information signal recording medium or a condition of a recordable area of the information signal recording medium. . 15. The buffer memory provided in the device according to claim 1, wherein the buffer memory includes n areas for temporarily storing the n information signals, respectively.
Any one of an information signal reproducing apparatus, an information signal recording apparatus, and an information signal recording / reproducing apparatus, wherein the n information signals are divided according to the value of each transfer rate. 16. The buffer memory provided in the device according to claim 1, wherein the buffer memory includes n areas for temporarily storing the n information signals, respectively.
Any one of an information signal reproducing apparatus, an information signal recording apparatus, and an information signal recording / reproducing apparatus, wherein said n information signals are divided according to respective recording or reproducing modes. 17. An information signal communication comprising an interface for communication connection with the outside at an output side of said buffer memory provided in the device according to claim 1. Description: apparatus. 18. An n-number (where n is an integer of 2 or more) information signal is previously recorded in each of n areas, and the n-number of information signals are provided by one movable head provided in the apparatus. Time-reproducing a signal to temporarily store the n information signals in a buffer memory in the apparatus at a constant transfer rate, and a transfer rate to the n information signals by the head; A read-only information signal recording medium formed so as to be able to reproduce the n information signals by absorbing a difference between each transfer rate of the n information signals output from the buffer memory with the buffer memory; Transfer rate to the n information signals by
Rp, the sum of the transfer rates of the n information signals ... Rn, the sum of the capacities of the n information signals ... Yn, the head moves from the current area to the next area on the information signal recording medium. Sum of seek times required for movement ... ΣSn
ΣYn ≧ n × Rp × ΣSn × T / (Rp−ΣR
A read-only information signal recording medium formed to satisfy the relational expression of n).