JP2004234752A - Information signal reproducing method, information signal recording method, information signal recording and reproducing method, information signal reproducing program, information signal recording program, information signal recording and reproducing program, information recording medium, information signal reproducing device, information signal recording device, and information signal recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information signal reproducing method reproducing information by absorbing difference of transfer rates of (n) information signals between information signal recording media of a plurality of layers and buffer memories. <P>SOLUTION: When a head 14 reproduces a plurality of signals from one signal layer on a medium 13, the following formula is satisfied, ΣYn≥Rp×ΣRn×ΣSn/(Rp-ΣRn), when the head 14 reproduces a plurality of signals from a plurality of signal layers on the medium 13, the following formula is satisfied, ΣYn≥Rp×ΣRn×(ΣSn+ΣFm)/(Rp-ΣRn), (n) information signals are transferred to the head 4 with time division between the medium 13 and a memory 19. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, n pickup signals (where n is an integer of 2 or more) based on video information such as a plurality of movies, audio information such as a plurality of music, and the like are provided through one buffer (n) through one buffer (n). Or an information signal recording method for recording and / or reproducing (recording, reproducing, recording / reproducing) an information signal recording medium having at least two signal surfaces such as light or magnetism by time division using a head or an information signal recording method. The present invention relates to a signal recording / reproducing method, an information signal reproducing program, an information signal recording program, an information signal recording / reproducing program, an information recording medium, an information signal reproducing device, an information signal recording device, and an information signal recording / reproducing device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an optical disk device (for example, a DVD player, a DVD recorder, a combination of a DVD drive and a PC and software) that uses an optical disk as an information signal recording medium, information signals such as video information such as movies and audio information such as music are compressed. The optical information is recorded on the optical disk by the optical pickup and the compressed information signal read from the optical disk by the optical pickup at the time of reproduction is decompressed. Information signals such as video information such as audio information such as music, etc. are compressed and recorded on an optical disk by one optical pickup, and at the time of reproduction, the compressed information signal read out from the optical disk by the optical pickup is decompressed. The process of playback during playback and recording during simultaneous recording can be performed for multiple (n) movies The transfer rate of information signals such as audio information such as information and music, the transfer rate of signals recorded and reproduced on an optical disc, and the travel time between information signals such as video information of two movies and audio information such as music. It is disclosed that it is realized by absorption in a buffer memory based on the relationship.
[0003]
[Patent Document 1]
JP 2001-283513 A
[0004]
[Problems to be solved by the invention]
By the way, in the recording / reproducing apparatus disclosed in Patent Document 1, the recording / reproducing operation can be favorably performed as a process in terms of movement between a plurality of (n) signals between one signal surface. In recent years, with the increase in the density and capacity of information signal recording media such as optical discs, two optical information recording media having at least two information signal surfaces are provided in different areas by one optical pickup head. It is required to alternately record and / or reproduce signals, and the present invention is an improvement over the prior art to satisfy the above requirements.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an information signal reproducing method, an information signal recording method, an information signal recording / reproducing method, an information signal reproducing program, an information signal recording program, an information signal recording method having the following configurations (1) to (12). An information signal recording / reproducing program, an information recording medium, an information signal reproducing device, an information signal recording device, and an information signal recording / reproducing device are provided.
(1) An information signal recording medium having at least first and second signal layers readable from one direction, in which n information signals (where n is an integer of 2 or more) are recorded at n positions, respectively. Rotating step;
Temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Transferring in a time-division manner;
Absorbing the difference between the transfer rate to the n information signals by the head and the transfer rate of the n information signals output from the buffer memory in the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
And reproducing the n information signals from the information signal recording medium in a time-division manner by satisfying the following relationship:
(2) temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Recording the n information signals read from the buffer memory at a constant transfer rate faster than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input to the buffer memory by the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
And recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner, satisfying the following relational expression:
(3) At least one of n information signals (where n is an integer of 2 or more) is recorded, and at least a first information signal that can be read from one direction for recording and reproduction for reproducing the remaining information signals is provided. 1, rotating an information signal recording medium having a second signal layer;
Temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Recording the information signal input to the buffer memory from one head on the information signal recording medium at a constant transfer rate faster than the transfer rate of the information signal;
Transferring the information signal reproduced by the head from the information signal recording medium to the buffer memory at the constant transfer rate faster than the transfer rate of the signal;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording and reproducing the n information signals on the information signal recording medium by satisfying the following relational expression:
(4) An information signal recording medium having at least first and second signal layers that can be read from one direction, in which n information signals (where n is an integer of 2 or more) are recorded at n positions, respectively. Rotating step;
Temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Transferring in a time-division manner;
Absorbing the difference between the transfer rate to the n information signals by the head and the transfer rate of the n information signals output from the buffer memory in the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Reproducing the n information signals from the information signal recording medium in a time-division manner by satisfying the following relational expression:
(5) temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Recording the n information signals read from the buffer memory at a constant transfer rate faster than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input to the buffer memory by the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner by satisfying the following relational expression:
(6) At least one of n information signals (where n is an integer of 2 or more) is recorded, and at least a first information signal that can be read from one direction for recording and reproduction for reproducing the remaining information signals is provided. 1, rotating an information signal recording medium having a second signal layer;
Temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Recording the information signal input to the buffer memory from one head on the information signal recording medium at a constant transfer rate faster than the transfer rate of the information signal;
Transferring the information signal reproduced by the head from the information signal recording medium to the buffer memory at the constant transfer rate faster than the transfer rate of the signal;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording and reproducing the n information signals on the information signal recording medium by satisfying the following relationship:
(7) An information signal recording medium having at least first and second signal layers that can be read from one direction, in which n information signals (where n is an integer of 2 or more) are recorded at n positions, respectively. Rotating step;
Temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Transferring in a time-division manner;
Absorbing the difference between the transfer rate to the n information signals by the head and the transfer rate of the n information signals output from the buffer memory in the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Reproducing the n number of information signals from the information signal recording medium in a time-division manner by satisfying the following relational expression:
(8) temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Recording the n information signals read from the buffer memory at a constant transfer rate higher than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input to the buffer memory by the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner, the information signal recording program being recorded on the information signal recording medium. recoding media.
(9) At least one of n information signals (where n is an integer of 2 or more) is recorded, and at least the first information signal that can be read from one direction for recording and reproduction for reproducing the remaining information signals is provided. 1, rotating an information signal recording medium having a second signal layer;
Temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Recording the information signal input to the buffer memory from one head on the information signal recording medium at a constant transfer rate faster than the transfer rate of the information signal;
Transferring the information signal reproduced by the head from the information signal recording medium to the buffer memory at the constant transfer rate faster than the transfer rate of the signal;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording and reproducing the n information signals on the information signal recording medium while satisfying the relational expression (1).
(10) An information signal recording medium having n (where n is an integer of 2 or more) information signals recorded at n positions and having at least first and second signal layers readable in one direction. Means for rotating;
Means for temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Means for time-division transfer;
Means for absorbing 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 output from the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Means for reproducing the n information signals from the information signal recording medium in a time-division manner by satisfying the following relationship:
(11) means for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Means for rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Means for recording the n information signals read from the buffer memory at a constant transfer rate faster than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Means for absorbing, by the buffer memory, a difference between a transfer rate of the head to the n information signals and a transfer rate of the n information signals input to the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Means 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:
(12) At least one of n information signals (where n is an integer of 2 or more) is recorded, and at least the first information signal that can be read from one direction for recording and reproduction for reproducing the remaining information signals is provided. 1, means for rotating an information signal recording medium having a second signal layer;
Means for temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Means for recording the information signal input to the buffer memory on the information signal recording medium from one head at a constant transfer rate higher than the transfer rate of the information signal, and an information signal reproduced from the information signal recording medium by the head. Means for transferring to the buffer memory at the constant transfer rate faster than the transfer rate of this signal, in a time-division manner,
Means for absorbing 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 input / output to / from the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Means for recording and reproducing the n information signals on the information signal recording medium by satisfying the following relational expression:
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an information signal reproducing apparatus, an information signal recording apparatus, and an information signal recording / reproducing apparatus according to the present invention will be described with reference to FIGS. 1 to 12, <First embodiment>, <Second embodiment>, < Third Embodiment> will be described in detail.
[0007]
<First embodiment>
In the information signal recording and / or reproducing apparatus according to the first embodiment of the present invention, as an information signal recording medium, an optical disk such as a DVD-RAM, a DVD-RW, a DVD + RW having a plurality of signal layers, a hard disk, a flexible disk, or the like. The present invention can be applied to a magnetic disk, a solid-state memory device using a semiconductor, and the like. In the following embodiment, a case where a multi-layer optical disk is applied as an information signal recording medium will be described.
FIG. 1 is a block diagram for explaining the overall configuration of an information signal recording and / or reproducing apparatus according to a first embodiment of the present invention.
[0008]
As shown in FIG. 1, in an information signal recording and / or reproducing apparatus (optical disk player) 10 according to a first embodiment of the present invention, an optical disk (recording / reproducing from one side) is mounted on a turntable 12 attached to a spindle motor 11. (A multi-layer (multi-layer) information signal recording medium) 13 that is rotatable.
[0009]
FIG. 11 shows two-layer and three-layer discs capable of recording and reproduction for both types used in this embodiment. Type 1 includes a layer 0 (L0) on the back side and a layer 1 (L1) that is semi-transparent on the near side from the pickup (PU) that performs recording and reproduction. ) From the outer circumference (out) to the outer circumference (out), the information recording area is started in accordance with the address increasing from the address of 30,000h, and the layer 1 (L1) moves from the outer circumference (out) to the inner circumference (in). There is a spiral groove toward it, and the address from the layer 0 (L0) is configured to increase continuously, and is configured to be recorded according to the address. The address of the layer 1 (L1) is recorded in an increasing direction continuously from the address of the layer 0 (L0), but the numerical value may be recorded as a complement.
[0010]
Type 2 includes a layer 0 (L0) for the signal layer on the back side from the pickup (PU) for recording and reproduction, a layer 1 (L1) for the semi-transmission of the intermediate signal layer, and a layer for the semi-transmission of the signal layer on the front side. The layer 0 (L0) has a spiral groove from the inner circumference (in) to the outer circumference (out), and is a recording area of information according to an address increasing from an address of 30,000h, as also called an opposite. Has been started, the layer 1 (L1) has a spiral groove from the outer periphery (out) toward the inner periphery (in), and the address from the layer 0 (L0) is continuously increased. The layer 2 (L2) has a spiral groove from the inner circumference (in) to the outer circumference (out), and is recorded in the layer 1 (L2). Be configured to increase subsequent address from 1) is configured as recorded according to the address.
The address of the layer 1 (L1) is recorded in an increasing direction continuously from the address of the layer 0 (L0), but the numerical value may be recorded as a complement.
[0011]
Further, 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 with a collimator lens, an objective lens, and the like, using a semiconductor laser provided inside, though not shown, as a light source. At this time, the semiconductor laser is driven by a 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. .
[0012]
The system controller 22 determines an instruction to start recording and / or reproduction by selecting a plurality of keys 23 and instructs the signal processing circuit 18 and the servo circuit 17. The signal read from the optical pick 14 is output by the preamplifier 16. The optical pickup 14 generates focusing and tracking signals for the tracks on the optical disc 13 by processing the servo signals in the servo circuit 17, and generates the optical signals by the driver circuit 15. By driving an actuator in the pickup 14, servo control of the optical pickup 14 is performed, and the optical pickup 14 is fed based on control data on the optical disc 13 so as to reproduce a sector of a target track on the optical disc 13. Optical disk 1 by motor Moving the radially.
[0013]
As shown in FIG. 11, in order to move the optical pickup 14 between signal layers of a disk having a plurality of recording / reproducing layers, the servo circuit 17 generates a focus error signal and a signal based on the focus error signal obtained by the preamplifier 16. Is processed to generate a focusing control signal for moving between signal surfaces of the optical disk 13, and a driver circuit 15 drives an actuator in the optical pickup 14 to control a focus jump of the optical pickup 14 (movement between signal surfaces). I do.
[0014]
The reproduction signal read out from the optical pickup 14 with one correction block as the minimum unit is used to optimize the frequency characteristic of the reproduction signal by the preamplifier 16 by the equalizer, apply PLL, and to execute the PLL bit clock and the data time. The system controller 22 has a jitter generation circuit generated by comparing the axes, and the system controller 22 measures the jitter value by A / D conversion, and changes the waveform correction circuit at the time of recording according to this value.
[0015]
Further, the signal is converted into a digital signal by the signal processing circuit 18, for example, synchronization detection is performed, the EFM + signal on the optical disk 13 is decoded into NRZI data, error correction processing is performed in units of correction blocks, and the sector address signal and The first, second,..., N-th (n is an integer of 2 or more) information signals described below are obtained. Since these n information signals are signals compressed at a variable transfer rate, they are stored in a track buffer memory 19 using a 64 MB (64 megabyte) DRAM serving as a temporary storage unit. , And temporarily absorbs the time axis of the variable transfer rate of the first, second,..., Nth information signals.
[0016]
The signal read from the track buffer memory 19 is converted into an audio signal from n information signals compressed based on MPEG2 by a decoder in an audio / video / encoder / decoder (hereinafter, referred to as AV-ENDEC) 20. The video signal is expanded and separated, and the audio signal and the video signal are output to the display 25 as audio and video signals via the NTSC encoder 24.
[0017]
26a to 26n are input terminals for inputting first, second,..., N-th information signals to be recorded, respectively. The first, second,..., Nth information signals input from the plurality of input terminals 26a to 26n are compressed at the compression rate set by the encoder in the AV-ENDEC 20, and connected to the AV-ENDEC 20. Each information signal is temporarily stored in the buffer memory 21 and is input to the signal processor 18 in a time-division manner.
[0018]
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 subjected to QPSK demodulation in the digital satellite decoder unit 42, error correction is performed, and a transport stream signal (in units of 188 bytes) is generated. The information signal, which has been converted into a program stream (in units of 2048 bytes) by the stream conversion unit 44 via the SW 43 and encrypted by scrambling based on the key information recorded on the optical disc 13 as necessary, is processed by the signal processing unit. 18, an error correction code is added by the signal processing unit 18, and the signal is temporarily stored in the track buffer memory 19. 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.
[0019]
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, and the buffer memory 21 is connected. ing.
[0020]
Further, a 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 at CLV based on the speed signal. In addition, a rotation position signal of a hall element of the spindle motor 11 is fed back to the servo circuit 17 and a FG control of a constant rotation is provided from a speed signal generated from the signal. The overall control between the LSIs is performed by the system controller 22.
[0021]
Also, the microcomputer in the system controller 22 recognizes key input and external control data in order to set the resolution of an image to be recorded, a high-speed scene such as a car race, and the like, or to set the recording time priority. , A switching terminal, which enables the recording time to be changed, and allows an external user to select the setting.
[0022]
In addition, as described later, the user can reproduce the video signal or the like recorded on the optical disc 13, record the video signal, and record the video signal currently being recorded as it is on the optical disc 13. It is configured to be able to reproduce video signals and the like in different areas. Further, the video signal or the like can be recorded in different areas on the optical disc 13 while the video signal currently being reproduced is being reproduced as it is. Similarly, it is configured such that a video signal or the like can be recorded in a different area 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 simultaneous reproduction such as picture-in-picture and two-screen simultaneous reproduction, chasing reproduction, post-recording recording, and counter program recording.
[0023]
Here, in the information signal recording and / or reproducing apparatus 10 according to the present invention, the first, second,..., N-th areas 13a, 13b,. ,..., And 19n are recorded in a time-division manner by one optical pickup 14 in the form of video information and audio information. The reproduction and / or reproduction will be described with reference to FIGS.
[0024]
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,... The state in which the first, second,..., N-th information signals are recorded and / or reproduced in a time-division manner by one optical pickup between the second,. FIG. In FIG. 2, illustration of a preamplifier and a signal processing circuit is omitted for easy understanding.
[0025]
FIG. 3 is a diagram showing the addresses of the first, second,..., N-th areas (data areas) on the optical disc and the addresses of the management areas.
[0026]
As shown in FIG. 2, the 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 and reproduction (for example, the address B1 area in FIG. 3). Is a data area for recording the n-th information signal N with the recording capacity Yn as the minimum unit for recording and reproduction (for example, the address N1 area in FIG. 3). 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, the first area 13a and the second area 13b on the optical disk 13 may be on the signal layer L0 of the optical disk 13 as shown in FIG. The first area 13a of the optical disc 13 may be on L0 of the signal layer, the second area 13b may be on L1 of the signal layer, and the nth area 13n may be on L2 of the signal layer. May be present, or the reverse relationship may be used.
[0027]
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 described later is maintained, and addresses A1, A2, A3 are provided for each area. ,... Are provided so that the first information signal A can be divided and recorded and reproduced. As shown in FIG. 3B, the second area 13b on the optical disk 13 is also divided into a plurality of pieces within a range in which a seek time S described later is protected, and addresses B1, B2, B3,. The assigned second information signal B can be divided and recorded / reproduced. Similarly, as shown in FIG. 3 (N), the n-th area 13n on the optical disk 13 is also divided into a plurality of pieces within a range in which a seek time S described later can be maintained, and the addresses N1, N2, N3, Are provided so that the n-th information signal N can be divided and recorded / reproduced.
[0028]
At this time, for example, an optical pickup is provided between the first address area A1 in the first area 13a for recording or reproduction first and the first address area B1 in the second area 13b for recording or reproduction next. 14 is set within a range that can be moved within 0.5 seconds, for example. Similarly, the entire area moves between the currently recorded or currently reproduced address area and the next recorded or reproduced address area. The seek time of the optical pickup 14 is at most 0.5 second within the same signal plane.
[0029]
On the single-layer optical disc 13, the first area 13a, the second area 13b, and the n-th area 13n move within one signal plane of the optical disc 13. However, when the first area 13a of the optical disc 13 is on L0 of the signal layer and the second area 13b is on L1 of the signal layer, the focus of the pickup between the layers is moved during the seek time S described above. A time F for performing a focus jump is added.
[0030]
This will be described in detail with reference to FIG. In FIG. 12, the movement of type 1 indicates a procedure for recording or reproducing signals on three signal layers of the signal layer L0, the signal layer L1, and the signal layer L2 in the type 2 three-layer disc of FIG. . In the reproduction or recording of the signal layer L0 of the three-layer disc and the signal layer L2 of the signal layer L1, A1 is read from the area 13a of the first information signal A of the signal layer L0 corresponding to the timing charts of FIGS. Reproduction or recording is performed, a focus jump F1 is made from the signal layer L0 to the signal layer L2 in the focus direction, and then the second information signal B is moved S1 near a position corresponding to the area 13b. Next, the area B1 of the 13b of the second information signal B of the signal layer L2 is reproduced or recorded, and then moved S2 to the area of the 13n of the nth information signal N to be reproduced or recorded next, and then reproduced or recorded. Focus jump F2 from the signal layer L2 to the signal layer L1 in the focus direction near the position corresponding to the 13n region of the nth information signal N of the signal layer L1 to be reproduced, and then the nth information signal N to be reproduced or recorded next 13n area N1 is reproduced or recorded, then a focus jump Fn is performed from the signal layer L1 to the signal layer L0 in the focus direction, and then the movement Sn is performed near the position corresponding to the area 13a of the first information signal A. .
[0031]
This operation shows a case of moving by a focus jump over three signal layers when reproducing or recording three signals.
[0032]
Next, the movement of type 2 in FIG. 12 indicates a procedure for recording or reproducing a signal on two signal layers of the signal layer L0 and the signal layer L2 in the type 2 three-layer disc of FIG. In the reproduction or recording of the signal layer L0 and the signal layer L2 of the three-layer disc, A1 is reproduced or recorded from the area 13a of the first information signal A of the signal layer L0 corresponding to the timing charts of FIGS. Then, a focus jump F1 is made from the signal layer L0 to the signal layer L2 in the focus direction, and then the second information signal B is moved S1 to a position near the position corresponding to the area 13b. Next, the area B1 of the 13b of the second information signal B in the signal layer L2 is reproduced or recorded, and then moved S2 to the area of the 13n of the nth information signal N to be reproduced or recorded next, and then reproduced or recorded. The 13n area N1 of the nth information signal N to be reproduced or recorded, then the focus jump Fn from the signal layer L2 to the signal layer L0 in the focus direction, and then to the 13a area of the first information signal A Move Sn near the corresponding position.
[0033]
This operation shows a case where the movement is performed over two signal layers when three signals are reproduced or recorded.
[0034]
As described above, in the case of movement across two or more signal layers as compared with movement within one signal layer, the time used for signal recording or reproduction is added by adding the time to move between the signal layers. Will be different. Also, for example, when two signals are present in two signal layers, and when a total of four signals are reproduced, there are cases where the focus is moved four times and reproduced, and the signals in one layer are reproduced. It can be seen that by performing the collective reproduction, the reproduction can be performed by two focus movements. I mean. It can also be seen that the number of movements in the focus direction changes and the movement time meter changes depending on the method of moving between the necessary signal layers.
[0035]
The time required for actually performing a focus jump from the signal layer to a different signal layer in the focus direction in the focusing direction is within a maximum of about 0.2 seconds including the stabilization time (the actual jump time between signal layers ends in several to several tens of msec. When the tracking re-pulling time, the time required to correct the eccentricity when the eccentricity is different between the signal layers, the retry time, the rotation waiting time, etc., a margin of about 0.2 seconds is required at worst. The seek time within the same signal plane is a time that cannot be ignored even when compared to a maximum of about 0.5 seconds.
[0036]
Similarly, in the embodiments in the following description, similarly, there are a case of recording or reproduction processing in one signal layer and a case of recording or reproduction processing over two or more signal layers, but the following description Is also performed in the same manner as the present description, and a detailed description will be omitted.
[0037]
Returning to FIG. 2, a management area 13x is provided in an inner peripheral portion of the optical disc 13, and this management area 13x has an address X (including information of a signal layer) {for example, addresses X1, X2, and X2 in FIG. .., And the n-th areas 13a, 13b,..., 13n are assigned to the first, second,. When the information signals A, B,..., N are not recorded, the start address and the end address as the empty area are managed, while when they are recorded, the first, second,. ,..., N, the start address and end address associated with the information signals A, B,..., N, the transfer rate of these information signals, title information, copyright information, etc. are recorded and managed. I have.
[0038]
A first buffer memory (hereinafter, referred to as a first area) 19a in the track buffer memory 19 is an area for temporarily storing the first information signal A, The second buffer memory (hereinafter, referred to as a second area) 19b is an area for temporarily storing the second information signal B, and similarly, an n-th buffer memory (hereinafter, referred to as a second area) in the track / buffer memory 19. , N-th area) 19n is an area for temporarily storing the n-th information signal N.
[0039]
One optical pickup 14 transfers the first, second,..., N-th information signals A, B,..., N between the optical disc 13 and the track buffer memory 19 in a time-division manner. , And the transfer rate Rp of the optical pickup 14 to the first, second,..., N-th information signals A, B,. Is, for example, 25 Mbps. The transfer rate Rp of the one optical pickup 14 to the first and second information signals A, B,..., N is the first, second,. ,..., N are set to values faster than the transfer rates Ra, Rb,.
[0040]
The first, second,..., N-th information signals A, B,..., N are transferred between the track buffer memory 19 and the AV-ENDEC 20. The transfer rate of the signal A is referred to as a transfer rate Ra, the transfer rate of the second information signal B is referred to as a transfer rate Rb, and similarly, the transfer rate of the n-th information signal N is referred to as a transfer rate Rn. The present invention is characterized in that the first, second,..., N-th information signals A, B,.
[0041]
Here, the transfer rates Ra, Rb,..., Rn of the first, second,..., N-th information signals A, B,. For example, the transfer rate is any one of 8 Mbps, 4 Mbps, and 2 Mbps.
a. A mode with a recording rate of 2 Mbps at a transfer rate for high image quality of, for example, 8 Mbps,
b. Mode with a recording time of 4 Mbps at a transfer rate for high image quality, for example, 4 Mbps,
c. Mode of recording time of 8 Mbps at 2 Mbps at a transfer rate for normal image quality,
.. Are prepared, and the mode is designated by a key input by the user during recording on the optical disk 13 so that the transfer rates of the first, second,... N-th information signals A, B,. .., Rn are set, and during reproduction from the optical disc 13, the first, second,..., N-th information signals A, B,. The compression rate at the time of recording is read out from the recorded control data, and the transfer rates Ra, Rb,..., Rn of the first, second,..., N-th information signals A, B,. Is set.
[0042]
The system controller 22 shown in FIG. 1 stores the first, second,..., N-th areas 19a, 19b,. .., Rn of the second,..., Nth information signals A, B,..., N, and the respective areas 19a, 19b,. , The EMPTY value indicating that the storage capacity is empty and the FULL value indicating that the storage capacity is full, the transfer rate Ra of the first, second,..., N-th information signals A, B,. .., Rn. The system controller 22 constantly monitors the remaining storage between the EMPTY value and the FULL value in each of the areas 19a, 19b,..., 19n in the track buffer memory 19.
[0043]
As a different embodiment, as described above, the track rate is determined by the values of the transfer rates Ra, Rb,..., Rn of the first, second,..., N-th information signals A, B,. .., 19n in the buffer memory 19 are divided not according to the recording mode or the reproduction mode. For example, assuming that the n information signals A, B,... N have the same transfer rate, the reproduction signal does not cause a serious problem even if the reproduction continuity is slightly impaired during reproduction, but the recording signal is continuous. If recording cannot be performed, a fatal defect will occur. For example, recording occupies a larger area in the track buffer memory 19. This processing is performed at the time when the system controller 22 inputs a recording or reproduction instruction, 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.
[0044]
In the information signal recording and / or reproducing apparatus 10 according to the present invention described above,
a. , N are reproduced from the read-only optical disc 13 in a time-division manner by one optical pickup 14, and the information signals A, B,. , N, are temporarily stored in the track buffer memory 19 at a constant transfer rate Rp faster than the transfer rates Ra, Rb,. When the n-th information signals A, B,..., N are output at the respective transfer rates Ra, Rb,.
b. .., Rn, respectively, and input at the first, second,..., N-th areas 19a, 19 in the track buffer memory 19, respectively. ,..., N temporarily stored in 19 nb by the optical pickup 14 at respective transfer rates Ra, Rb,. .., 13n on the optical disk 13 in a time-divisional manner at a constant higher transfer rate Rp;
c. One of the first, second,..., N-th information signals A, B,. .., Rn are temporarily stored in the track buffer memory 19 at a fixed transfer rate Rp, and the first, second,..., N-th information signals A, B,. .., N, the information signals that are not reproduced 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.
[0045]
At this time, one optical pickup 14 can record or reproduce only one of the first, second,..., N-th information signals A, B,. It has become.
[0046]
Here, when recording and / or reproducing the n information signals A, B,..., N on the optical disc 13 by one optical pickup 14 in a time division manner, the optical disc 13 and the An operation condition for maintaining continuity in time division with the buffer memory 19 will be described.
[0047]
.., N from the optical pickup 14 to the track / buffer memory 19 when reading out the first, second,..., N-th information signals A, B,.
Average transfer rate for reading out the first information signal A from the first area 19a of the track buffer memory 19 to the AV-ENDEC 20 side ... Ra (Mbps)
Average transfer rate for reading the second information signal B from the first area 19b of the track buffer memory 19 to the AV-ENDEC 20 side ... Rb (Mbps)
......
......
Transfer rate of average transfer rate for reading out the n-th information signal N from the first area 19n of the track buffer memory 19 to the AV-ENDEC 20 side ... Rn (Mbps)
Minimum storage capacity of the track buffer memory 19: Ym (Mbit)
Reproduction information unit amount when reading out the first information signal A recorded in the first area 13a on the optical disc 13 ... Ya (Mbit)
Reproduction information unit amount when reading out the second information signal B recorded in the second area 13b on the optical disc 13 ... Yb (Mbit)
......
Reproduction information unit amount when reading out the n-th information signal N recorded in the n-th area 13n on the optical disc 13 ... Yn (Mbit)
Seek time required for the optical pickup 14 to move from the current area to the next area on the optical disk 13... Sn (s)
However, S1 (= Sab) is from the first area 13a to the second area 13b on the same signal surface of the optical disk 13, S2 (= Sbc) is from the second area 13b to the third area 13c, and so on. Here, Sn (= Sna) is a seek time required for moving from the n-th area 13n to the next first area 13a.
[0048]
When the optical pickup 14 needs signals on a plurality of signal surfaces of the optical disk 13, the time required for moving from the current signal layer to the next signal layer: Fm (s), (n ≧ m ≧ 2)
Here, F1 (= Fab) is from the signal layer of the first area 13a on the optical disc 13 to the signal layer of the second area 13b, and F2 (= Fbc) is from the signal layer of the second area 13b to the third area. Similarly, in the signal layer 13c, Sn (= Sna) is the focus movement time required to move from the signal layer in the n-th region 13n to the signal layer in the next first region 13a, and m (n) instead of n ≧ m ≧ 2) is used even when n signals are reproduced or recorded as described above, the number of focus movements becomes smaller than n depending on the position where the signals are arranged in the signal layer and the procedure of reproducing or recording. This is because there are cases.
[0049]
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 same signal surface of the optical disc 13 and the optical pickup 14 moves to the next area. The moving time and the optical pickup 14 moved to the next area confirm the address on the target track in this area, complete the preparation work for recording or reproduction, and start recording or reproducing the next information signal. It shows the time obtained by adding the time until the start.
[0050]
When recording or recording / reproducing the n information signals A, B,..., N in time division, the first, second,. , 19n, and the sum of the transfer rates Ra, Rb, ..., Rn of the first, second, ..., nth information signals A, B, ..., N (ＢRn = Ra + Rb ... + Rn ) Indicate the first, second,..., N-th areas 13a, 13b,..., 13n on the optical disc 13 and the first, second,. , 19b,..., 19n, exceeds the transfer rate Rp by one optical pickup 14 for transferring the first, second,..., Nth information signals A, B,. must not.
[0051]
If the above case is represented by an equation,
Rp> Ra + Rb... + Rn (1 formula)
It becomes.
[0052]
Further, the recording time or the reproduction time Ta (s) for recording or reproducing the first information signal A by the optical pickup 14 is Ta = Ya / Rp (2)
The recording time or reproduction time Tb (s) for recording or reproducing the second information signal B by the optical pickup 14 is Tb = Yb / Rp (3)
......
......
[0053]
Similarly, the recording time or the reproduction time Tn (s) in which the optical pickup 14 records or reproduces the n-th information signal N is Tn = Yn / Rp (Equation 4)
It is.
[0054]
Also, the transfer rate Rp of the optical pickup 14 to the first, second,..., N-th information signals A, B,. , N, and the difference between the transfer rates Ra, Rb,..., Rn of the n information signals A, B,.
Rp / (Rp-Ra-Rb... -Rn) (Equation 5)
far.
This (Equation 5) is the ratio between the maximum transfer rate for reading and the transfer rate for the margin.
[0055]
At this time, the above-mentioned Rp is used to record or record / reproduce the first, second,..., N-th information signals A, B,. Or, it corresponds to the time of one cycle period until reproduction (eg, the section (one cycle) of A1, S1, F1, B1, S2, F2,..., N1, Sn, Fm in FIG. 4), and (Rp-Ra-Rb... -Rn) corresponds to the seek period in this one cycle period.
On the other hand, 1st, 2nd,..., N-th information signals A, B,. The ratio of the cycle time to the total seek time during this one cycle period is
(Ta + S1 + Tb + S2 ... + Tn + Sn) / (S1 + S2 ... + Sn) (Equation 6)
far.
[0056]
In this one cycle, besides the reproduction time of the first and second information signals A, B... N and the total seek time of each, there is a limit that there is no extra (standby) time such as a time for the pickup to wait. Assume a state.
At this time, only the time corresponding to the transfer rate of the transfer rate of the medium minus the transfer rate of the reproduction signal is the time during which the pickup can be moved from the signal surface of the medium. The ratio (Equation 5) of the maximum transfer rate Rp at the time of reading and the margin of the transfer rate (Equation 5), the time for one cycle, and the margin during which the signal is not reproduced from the disk during this one cycle period It is possible to make the ratio of each time to the total seek time (Equation 6) equal.
[0057]
Total transfer rate / margin transfer rate = 1 cycle time / margin time (seek time) Rp / (Rp-Ra-Rb ...- Rn) = (Ta + S1 + F1 + Tb + S2 + F2 ... + Tn + Sn + Fm) / (S1 + F1 + S2 + F2 ... + Sn + Fm) (7) )
Rp / (Rp-Ra-Rb ...- Rn) = 1 + (Ta + Tb ... + Tn) / (S1 + F1 + S2 + F2 ... + Sn + Fm) (Formula 7-1)
Rp / (Rp-Ra-Rb ...- Rn) -1 = (Ta + Tb ... + Tn) / (S1 + F1 + S2 + F2 ... + Sn + Fm) (Formula 7-2)
(Rp-Rp + Ra + Rb ... + Rn) / (Rp-Ra-Rb ...- Rn) = (Ta + Tb ... + Tn) / (S1 + F1 + S2 + F2 ... + Sn + Fm) (Equation 7-3)
(Ra + Rb ... + Rn) / (Rp-Ra-Rb ...- Rn) = (Ta + Tb ... + Tn) / (S1 + F1 + S2 + F2 ... + Sn + Fm) (Equation 7-3)
Becomes
(Ta + Tb ... + Tn) = (Ra + Rb ... + Rn) * (S1 + F1 + S2 + F2 ... + Sn + Fm) / (Rp-Ra-Rb ...- Rn) (Equation 8)
It becomes. By substituting (2) and (3) into (8),
(Ya + Yb ... + Yn) = Rp * (Ra + Rb ... + Rn) * (S1 + F1 + S2 + F2 ... + Sn + Fm) / (Rp-Ra-Rb ...- Rn) (Equation 9)
It becomes.
[0058]
If it is not a multi-layer recording / playback,
(Ya + Yb ... + Yn) = Rp * (Ra + Rb ... + Rn) * (S1 + S2 ... + Sn) / (Rp-Ra-Rb ...- Rn)
Here, the transfer rate Rp between the optical disk 13 and the track / buffer memory 19 is constant based on the standard of the disk and the specifications of the apparatus. Changing the transfer rate Rp means changing the rotational speed of the disk. And cannot be finely changed in a short time depending on the type of the transfer rate of the reproduction signal.
[0059]
On the other hand, the transfer rates Ra, Rb,..., Rn of the first, second,..., N-th information signals A, B,. Is determined by the recording state recorded in the. Further, the seek time Sn and the focus movement time Fm of the optical pickup 14 are determined by the address positional relationship on the optical disk 13 to be reproduced and the mechanical specifications of the apparatus. , The first, second,..., N-th information signals A, which are the only substantial variables and are the amount of information to be transferred to the buffer for performing recording or recording / reproduction continuously. , B,..., N can satisfy the following (Equation 10, 11, 13). However, (Equation 10) and (Equation 11) are different expressions, but they are the same expression. (Equation 13) is only the fixed seek time of (Equation 11), and is generally (11) Expression) should be satisfied.
Each information amount Ya, Yb,..., Yn can satisfy the following (Equations 14 to 16).
[0060]
That is,
(Ya + Yb ... + Yn) ≥Rp * (Ra + Rb ... + Rn) * (S1 + F1 + S2 + F2 ... + Sn + Fm) / (Rp-Ra-Rb ...- Rn) (Equation 10)
Here, ΔYn = Ya + Yb... + Yn
ΣRn = Ra + Rb... + Rn
ΣSn = S1 + S2 ... + Sn
ΣFm = F1 + F2... + Fm (n ≧ m ≧ 2)
When n ≧ m ≧ 2, when a focus jump occurs, the number of times that the focus jump is performed is n (a positive integer equal to or greater than 2), and when recording and reproducing n (m is a positive integer equal to or more than 2) signals, the number of times the focus jump is equal to or less than m (positive integer equal to or greater than 2) (Integer of the formula (10)), which means that when the focus jump is performed even once, the signal surface returns to the signal surface where recording and reproduction were performed first again, and this means that the number of times is two or more. Is expressed by a general formula,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn) (Equation 11)
It becomes.
[0061]
If it is not a multi-layer recording / playback,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn) (formula 11a)
It is.
The above-described seek time Sn is a time required to move from the current location to the next location, and varies according to the positional relationship. However, the seek time moves between the innermost circumference and the outermost circumference of the optical disc 13. If the allowable seek time S is the same fixed time required for
ΣSn = n × S (Equation 12)
And
The above-described focus movement (jump) time Fm is a time required to move from the current signal layer to the next signal layer, and is a value that varies depending on gravity and the moving direction. If the allowable seek time F is the same fixed time required to move between
ΣFm = m × F (Equation 12-1)
Therefore, when (Equation 12) and (12-1) are substituted into (Equation 11),
ΣYn ≧ Rp × ΣRn × (nxS + mxF) / (Rp−ΣRn) (Equation 13)
It becomes.
[0062]
If it is not a multi-layer recording / playback,
ΣYn ≧ Rp × ΣRn × n × S / (Rp−ΣRn).
The above-described allowable seek time S is set to about 0.5 seconds in the recordable DVD optical disk 13.
The recording capacities Ya, Yb,..., Yn can satisfy the following (Equation 14) to (Equation 16) with respect to each of the transfer rates Ra, Rb,.
This can be considered in the same manner as in the case of two signals.
That is, the expression (13) needs to be obtained by multiplying the transfer rate ratio Rp / (Rp-ΣRn) by the seek time ΣSn corresponding to the margin time, and further by the transfer rate ΣRn of the signal to be reproduced. It means that it becomes information amount,
(ΣSn + ΣFm) × Rp / (Rp−ΣRn) = Kp (Equation 11-2)
Assuming that Kp is a coefficient such as a signal transfer rate,
ΣYn ≧ ΣRn × Kp (Equation 11-3)
It becomes.
[0063]
In this (Equation 11-3), even if Rn changes within a range of ΔRn = a certain value, the value of Kp does not change. The information amount Ya is proportional to Ra for continuous reproduction, the information amount Yb is proportional to Rb for continuous reproduction, and the information amount Yn is proportional to Rn for continuous reproduction. The information amount Ya, the minimum information amount Yb,..., The minimum information amount Yn are expressed as a relationship between the transfer rate Ra, the transfer rate Rb,
Ya: Yb ...: Yn = Ra: Rb ...: Rn (Equation 11-4)
It becomes.
Substituting this relationship into (Equation 11-3) gives, independently,
Ya ≧ Ra × Kp (Equation 11-5)
Yb ≧ Rb × Kp (Equation 11-6)
Yn ≧ Rn × Kp (Equation 11-7)
It can be.
[0064]
If you undo this,
Ya ≧ Rp × Ra × (S1 + F1 + S2 + F2 ... + Sn + Fm) / (Rp-Ra-Rb ...- Rn) (Equation 14)
Yb ≧ Rp × Rb × (S1 + F1 + S2 + F2 ... + Sn + Fm) / (Rp-Ra-Rb ...- Rn) (Equation 15)
......
......
Yn ≧ Rp × Rn × (S1 + F1 + S2 + F2 ... + Sn + Fm) / (Rp-Ra-Rb ...- Rn) (Equation 16)
[0065]
That is, the transfer rate Rp by the optical pickup 14, the transfer rates Ra, Rb,..., Rn of the first, second,..., Nth information signals A, B,. When the seek times S1, S2,..., Sn of the optical pickup 14 moving between the first, second,..., N-th areas 13a, 13b,. ,..., N, the recording capacity Ya, Yb,... Yn of the minimum recording unit of the n-th information signal A, B,. If the equations (10, 11, 13) and (14 to 16) are not satisfied, the continuity at the time of recording or recording / reproducing of the information signals A, B,..., N will be lost.
However, (Equation 10) and (Equation 11) are different expressions, but they are the same expression. (Equation 13) is only the fixed seek time of (Equation 11), and is generally (11) Expression) and (Expression 14 to Expression 16) may be satisfied.
[0066]
Next, when recording and / or reproducing n information signals A, B,..., N, the basic storage capacity Ym of the track / buffer memory 19 is such that each signal is stored in one cycle. Multiplied by the transfer rate of
Ym> (Ta + S1 + F1 + Tb + S2 + F2... + Tn + Sn + Fm) × (Ra + Rb +... + Rn) (Formula 17-1)
It becomes.
[0067]
When the seek time Sn is the allowable seek time S that is the same fixed time required to move between the innermost circumference and the outermost circumference of the optical disc 13, and F is the focus movement time,
Ym> (Ta + Tb +... + Tn + n × S + m × F) × (Ra + Rb +... + Rn) (Formula 17-2)
It becomes. This value of Ym means that it is necessary to secure a value larger than this value in consideration of retry processing, a function as a shock proof memory, and other system margins as actual operation.
Equations (17-1) and (17-2) are equivalent to equations (2), (3), and (4), and equations (10), (11), ( 13) From the same calculation,
Ym> Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn) (Equation 17)
Becomes
Ym> Rp × ΣRn × (nxS + mxF) / (Rp−ΣRn) (Equation 18)
It becomes.
If it is not a multi-layer recording / playback,
Ym> Rp × ΣRn × ΣSn / (Rp-ΣRn)
Becomes
Ym> Rp × ΣRn × n × S / (Rp-ΣRn)
It becomes.
[0068]
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 in FIG. 1, but is naturally connected to the AV-ENDEC 20 in FIG. A part of the buffer memory 21 of 64 MB (64 megabytes) may be similarly used as a track buffer memory.
[0069]
When recording n information signals A, B,..., N on the optical disc 13 in a time-division manner using one optical pickup 14, the first, second,. It is necessary to know each free area in the area.
[0070]
Therefore, here, the start address and the end address of the free area are specified from the interval between the start address and the end address of the data area recorded in the management area 13c on the optical disc 13, and the capacity of the independent free area is calculated. Then, 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.
[0071]
At this time, when the transfer rate of the information signal to be recorded is three types, for example, 2, 4, and 8 Mbps, it is determined by calculation whether the capacity of each independent empty area is capable of continuous recording or continuous recording and reproduction.
[0072]
Regarding 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. , 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.
[0073]
(Information signal reproducing device)
In the information signal reproducing apparatus, the first, second,..., N-th information signals A, B,. In the case of recording on the signal surface of the first layer, the data is reproduced between the signal surfaces by moving by the focus jump as described above.
[0074]
Here, the optical disc 13 is formed only for reproduction, and a first information signal A having a recording capacity Ya is previously recorded on the optical disc 13 in a first area 13a, and a second information signal A having a recording capacity Yb is provided. The information signal B is recorded in advance in the second area 13b (the first area 13a and the second area 13b may be divided into two or more signal surfaces in some cases). It is assumed that the n-th information signal N having the following is recorded in the n-th area 13n in advance.
[0075]
FIG. 4 is a timing chart showing a state in which the first to n-th information signals are reproduced from the optical disc by one optical pickup in a time division manner. In FIG. 4, the transfer rates of the first to n-th information signals are shown at the same transfer rate for the sake of illustration, but the same tendency is exhibited even when both are different.
[0076]
First, when the reproducing operation to the optical disk 13 is started, the optical pickup 14 reproduces the management area 13c on the optical disk 13 to grasp each address area, and thereafter, the optical pickup 14 moves to the first area 13a. Reproduction is started from the first address area A1, 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) constantly monitors the EMPTY value and the FULL value of the first area 19a in the track / buffer memory 19, and performs the first information signal only in the first cycle. A is stored at the transfer rate Rp until A reaches the EMPTY value.
[0077]
Next, when the first information signal A exceeds the EMPTY value, the first information signal A is read out to the AV-ENDEC 20 at the transfer rate Ra, so that the value between the EMPTY value and the FULL value as shown in FIG. Then, the transfer rate Rp at which the first information signal A is written to the first area 19a of the track buffer memory 19 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. The first information signal A is temporarily stored in the first area 19a while increasing with the slope of the difference (Rp-Ra).
[0078]
Next, when the first information signal A stored in the first area 19a in the track buffer memory 19 reaches the FULL value, the optical pickup 14 moves to the first position in the first area 13a on the optical disk 13. The reproduction in the address area A1 is stopped. Here, from the stage where the reproduction of the first information signal A is stopped, the first information signal A stored in the first area 19a in the track buffer memory 19 is transferred to the AV-ENDEC 20 at the transfer rate Ra. As will be apparent from FIG. 4, the reading operation may be completed before the period up to the EMPTY value is reached before the reproduction of the second address area A2 in the first area 13a is started.
[0079]
Next, the optical pickup 14 moves to the first address area B1 in the second area 13b on the optical disc 13 to be reproduced next (when moving to a different signal layer, the focus jump (movement) is performed as described above). To move between signal planes). At this time, the seek time S1 in the same plane in 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 a maximum. Within 0.5 seconds. When moving to a different signal layer, a range in which the signal can be moved by adding 0.2 seconds to the signal layer is set. As a whole, between the first information signal A and the second information signal B to be recorded next. The seek time of the optical pickup 14 that moves is within 0.5 seconds at the maximum (0.7 seconds between the signal surfaces of the two layers). (In FIG. 4 (similarly in FIG. 5), the seek times are described as S1, S2, and Sn, but when moving to a different signal layer, S1 + F1, F2 + S2 including F1, F2, and Fm of the focus jump as described above. , Sn + Fm are shown.)
[0080]
Next, when the optical pickup 14 reaches the address area B1 (target position) of the second area 13b on the optical disk 13, the optical pickup 14 moves from the first address area B1 in the second area 13b on the optical disk 13. The reproduction is started, and the second 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.
[0081]
Next, when the second information signal B stored in the second area 19b in the track buffer memory 19 exceeds the EMPTY value, the second information signal B is read out to the AV-ENDEC 20 at the transfer rate Rb. As shown in FIG. 4, between the EMPTY value and the FULL value, the transfer rate Rp at which the second information signal B is written to the second area 19b of the track buffer memory 19, and the second information signal B The second information signal B is temporarily stored in the second area 19b while increasing with the slope of the difference (Rp-Rb) of the transfer rate Rb read from the second area 19b to the AV-ENDEC 20 side.
[0082]
Next, when the second information signal B stored in the second area 19b in the track buffer memory 19 reaches the FULL value, the optical pickup 14 moves to the address area B1 of the second area 13b on the optical disk 13. Stop playback of. Here, from the stage where the reproduction of the second information signal B is stopped, the second information signal B stored in the second area 19b in the track buffer memory 19 is transferred to the AV-ENDEC 20 at the transfer rate Rb. As will be apparent from FIG. 4, the read operation may be completed before the period until the EMPTY value is reached before the reproduction of the second address area B2 in the second area 13b is started.
[0083]
Next, the optical pickup 14 moves to an area on the optical disk 13 to be reproduced next (when moving to a different signal layer, the focus jump (movement) is performed to move between signal planes as described above). Similarly, when the optical pickup 14 finishes reproducing the n-th information signal N from the address area N1 of the n-th area 13n on the optical disk 13, the optical pickup 14 returns to the first optical disk 13 to be reproduced next. It moves to the second address area A2 in the area 13a.
[0084]
As described above, the first, second,..., N-th information signals A, B,. ,..., N2,.
[0085]
In the reproducing operation of the information signal reproducing apparatus, the above-described (Equation 1) to (Equation 18) are satisfied. For example, based on the management information recorded in the management area in FIG. If the plurality of pieces of information to be reproduced is information that spans a plurality of layers, the amount of information to be read is determined using (Equation 11), and the information to be reproduced next is information that does not extend over a plurality of layers. In the case of reproduction, the amount of information to be read can be determined using (11a), and continuous reproduction can be performed. According to this method, in the case of reproducing information in which a plurality of pieces of information do not extend over a plurality of layers, there is an effect that a use area of the buffer is small and the buffer can be effectively used as another area.
In addition, when the plurality of pieces of information to be reproduced next is reproduction of information that extends over a plurality of layers, and when the plurality of pieces of information to be reproduced next is reproduction of information that does not extend over a plurality of layers, (11) By determining the amount of information to be read using the expression, continuous reproduction can be performed. According to this method, it is possible to make the readout amount of information common regardless of whether a plurality of pieces of information cross over a plurality of layers. Therefore, there is an effect that the control of reproduction can be simplified and the program capacity can be reduced. . Details other than the above are omitted here.
[0086]
(Information signal recording device)
.., Rn of the track buffer memory 19 at the first, second,..., N-th transfer rates Ra, Rb,. , 19n input to the first, second,..., N-th information signals A, B,. .., 13n on the optical disc 13 in a time-division manner at a constant transfer rate higher than the transfer rates Ra, Rb,. Things.
[0087]
Here, the optical disc 13 is formed so as to be recordable and reproducible. On the optical disc 13, a first area 13a for recording a first information signal A having a recording capacity Ya and a second area 13a having a recording capacity Yb are provided. A second area 13b for recording the second information signal B and an n-th area 13n for recording the n-th information signal N having the recording capacity Yn are prepared in advance. Further, each free area can be grasped from each address area by the management area 13x on the optical disc 13.
[0088]
When recording on the optical disc 13, the MPEG encoder in the AV-ENDEC 20 transmits the first, second,..., N-th information signals A, B,. Rn can be set in a recording mode (a transfer rate of 8 Mbps for high image quality, a transfer rate of 4 Mbps for high image quality, and a transfer rate of 2 Mbps for normal image quality) specified by the user. ,..., N-th information signals A, B,..., N from the AV-ENDEC 20 to the signal processing circuit 20 (FIG. 1) in the first and second 64 MB (64 megabyte) track buffer memories 19. ,..., 19n are temporarily stored in the n-th areas 19a, 19b,. It is a waiting state. , 19n of the track buffer memory 19 while controlling the remaining capacity in each area 19a, 19b,..., 19n while the capacity in each area 19a, 19b,. ., N,..., N-th information signals A, B,. , N are read out in a time-division manner, and the first, second,..., N-th information signals A read out at a constant transfer rate Rp faster than the transfer rates Ra, Rb,. , B,..., N are recorded on the optical disc 13 in a time-division manner. By repeating this, continuous recording is performed.
[0089]
FIG. 5 is a timing chart showing a state in which the first, second,..., N-th information signals are recorded on the optical disc 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 convenience of illustration, but the same tendency is exhibited even when the two are different.
[0090]
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.
[0091]
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) constantly monitors the EMPTY value and the FULL value of the first area 19a in the track / buffer memory 19 until the first information signal A reaches the FULL value. It is stored at the transfer rate Ra.
[0092]
Here, when the first information signal A stored in the first area 19a in the track buffer memory 19 becomes a FULL value, the first information signal A is read out to the optical pickup 14 at a constant transfer rate Rp. Therefore, as shown in FIG. 5, 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 kept constant by the optical pickup 14. The data is recorded in the first area 13a on the optical disc 13 at the transfer rate Rp.
[0093]
Next, when the first information signal A stored in the first area 19a in the track buffer memory 19 reaches the EMPTY value, the optical pickup 14 moves to the first position in the first area 13a on the optical disk 13. The recording in the address area A1 is stopped. Here, from the stage where the recording of the first information signal A is stopped, the first information signal A is continuously transmitted from the AV-ENDEC 20 side to the first area 19a in the track buffer memory 19 at the transfer rate Ra. However, as is clear from FIG. 5, the writing operation may be completed before the period up to the FULL value is reached before the start of recording in the second address area A2 in the first area 13a.
[0094]
Next, the optical pickup 14 moves to the first address area B1 in the second area 13b on the optical disc 13 in order to record the second information signal B next. The focus jump (movement) is performed as shown in FIG. 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 same plane of the optical disc 13 to the first address area B1 in the second area 13b is a maximum. The time is within 0.5 seconds (0.7 seconds between two signal surfaces).
[0095]
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. Then, when the second information signal B stored in the second area 19b in the track buffer memory 19 becomes a FULL value, the second information signal B is read out to the optical pickup 14 at a constant transfer rate Rp. Therefore, as shown in FIG. 5, between the FULL value and the EMPTY value, the second information signal B is reduced by the slope of the difference (Rp-Rb) while the second information signal B is kept constant by the optical pickup 14. The data is recorded in the second area 13b on the optical disc 13 at the transfer rate Rp.
[0096]
Thereafter, when the second information signal B stored in the second area 19b in the track / buffer memory 19 reaches the EMPTY value, the optical pickup 14 moves to the address area B1 of the second area 13b on the optical disk 13. Stop recording. Here, from the stage where the recording of the second information signal B is stopped, the second information signal B is continuously sent from the AV-ENDEC 20 side to the second area 19 b in the track buffer memory 19. As is clear from FIG. 5, the operation may be completed before the period up to the FULL value is reached before the start of recording in the second address area B2 in the second area 13b.
[0097]
Next, the optical pickup 14 moves to an area on the optical disk 13 to be recorded next (if the optical pickup 14 moves to a different signal layer, the focus jump (movement) is performed to move between signal planes as described above). Similarly, when the optical pickup 14 finishes recording the n-th information signal N in the address area N1 of the n-th area 13n on the optical disc 13, the optical pickup 14 starts the first recording on the optical disc 13 to be recorded next. It moves to the second address area A2 in the area 13a.
[0098]
As described above, the first, second,..., N-th information signals A, B,. ,..., N2,.
[0099]
Also, the recording operation of the information signal recording apparatus satisfies the above-described (Equation 1) to (Equation 18). For example, based on the management information of the free area to be recorded in the management area in FIG. If a plurality of pieces of information to be recorded next is a record of information covering a plurality of layers, the amount of information to be recorded is determined using (Equation 11), and a plurality of pieces of information to be recorded next are stored in a plurality of layers. In the case of recording information that does not straddle, it is possible to determine the amount of information to be recorded by using (11a) and perform continuous recording. According to this method, when a plurality of pieces of information is information recording that does not extend over a plurality of layers, an area where a buffer is used can be reduced, and the area can be effectively used as another area.
In addition, when the plurality of pieces of information to be recorded next is a record of information over a plurality of layers, and when the plurality of pieces of information to be recorded next is a record of information that does not extend over a plurality of layers, (11) The continuous recording can be performed by determining the amount of information to be recorded by using the formula). According to this method, the recording amount of information can be made common regardless of whether a plurality of pieces of information do not cross over a plurality of layers. Therefore, there is an effect that the control of recording can be simplified and the program capacity can be reduced. . After the recording, the management information of the recorded area of the management area is updated based on the recorded information. This management area is arranged so that signal information of a plurality of signal layers can be collectively managed in one signal layer in a medium having a plurality of signal surfaces. This is because such a configuration facilitates management of management information in the management area. Details other than the above are omitted here.
[0100]
(Information signal recording / reproducing device)
The information signal recording / reproducing apparatus is a combination of the information signal recording apparatus described above and the information signal reproducing apparatus, and includes first, second,..., N-th transfer rates Ra, Rb,. .., And N are reproduced from the optical disk 13 by the optical pickup 14 in a time-division manner, and the first, second,. .., N-th transfer rates Ra, Rb,..., Rn, and a fixed transfer rate Rp faster than the first, second,..., N-th information signals A, The information signals which are not reproduced among 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.
[0101]
Although the recording / reproducing operation of the 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 of the information signal recording apparatus described above and the information signal reproducing apparatus. In this case, the seek time Sn of the optical pickup 14 on the same plane is within 0.5 seconds at maximum (0.7 seconds between the signal surfaces of the two layers).
[0102]
The recording / reproducing operation of the information signal recording / reproducing apparatus also satisfies the above-described (Equation 1) to (Equation 18). For example, information to be reproduced recorded in the management area of FIG. If the plurality of pieces of information to be recorded / reproduced next is the recording / reproduction of information covering a plurality of layers, the amount of information to be recorded is determined using (Equation 11) based on the management information of the free area of the information. If the next plurality of information to be recorded / reproduced is information that does not extend over a plurality of layers, the amount of information to be recorded / reproduced is determined using equation (11a) and continuous recording / reproduction is performed. It can be carried out. According to this method, when recording / reproducing information in which a plurality of pieces of information does not extend over a plurality of layers, there is an effect that the use area of the buffer is small and it can be effectively used as other areas.
Further, even when a plurality of pieces of information to be recorded / reproduced next are recording / reproduction of information over a plurality of layers, a case where a plurality of pieces of information to be recorded / reproduced next are recording / reproduction of information not over a plurality of layers Also, by determining the amount of information to be recorded and reproduced using (Equation 11), continuous recording and reproduction can be performed. According to this method, the information recording / reproducing amount can be made common regardless of whether a plurality of pieces of information do not straddle a plurality of layers, so that the recording / reproducing control can be simplified and the program capacity can be reduced. Having. After the recording, the management information of the recorded area of the management area is updated based on the recorded information. This management area is arranged so that signal information of a plurality of signal layers can be collectively managed in one signal layer in a medium having a plurality of signal surfaces. This is because such a configuration facilitates management of management information in the management area. Details other than the above are omitted here.
[0103]
<Second embodiment>
FIG. 6 is a block diagram for explaining the overall configuration of the information signal communication device according to the second embodiment of the present invention.
For the sake of convenience, the same components as those described above will be denoted by the same reference numerals and will be described as appropriate, and new components will be denoted by new reference numerals, and the second embodiment will be described. In the following, a description will be given mainly of points different from the first embodiment.
[0104]
The information signal recording and / or reproducing apparatus 10 according to the first embodiment described above is an optical disc player that compresses and expands a video signal and an audio signal, but according to the present invention shown in FIG. The information signal communication apparatus 30 according to the second embodiment has an optical disk drive having no compression / decompression block, and an ATAPI for making an external communication connection to an output side of a track buffer memory 19 provided in the optical disk drive. An interface 31 is provided, a host 32 is externally connected as a host computer, and a block for compression / expansion of an AV-ENDEC (audio / video / encoder / decoder) 20 is connected. A plurality of information signals received by the antenna 41 and decoded in the digital satellite decoder unit 42 or the Internet. The second embodiment is different from the first embodiment in that a plurality of information signals from the slave 45 are connected to the ATAPI interface 31 so as to be selectively input to the ATAPI interface 31 in a compressed state via the SW 43 and the stream converter 44. Same as in the example. The optical disk drive described above 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. A program ROM in which a program for realizing the operation described in detail in the present embodiment is described is not only recorded as a mask ROM or the like in a program ROM in the apparatus, but also a CD-ROM disk or the like. A program recorded on a DVD-ROM disc and executed by being read from an external device into the RAM of the recording / reproducing device, or a program for realizing the above-described operation can be transmitted to the Internet or satellite communication. The present embodiment also includes a program itself which is downloaded via the RAM and is executed by being read into the RAM of the recording / reproducing apparatus.
[0105]
More specifically, there is an I / F block in the ATAPI interface 31, and an I / F block in the I / F part of the AV-ENDEC 20, which is connected by the ATAPI interface 31 and commands the computer peripheral disk storage device. Fuji Mt. The optical disk drive is controlled based on the Fuji command system.
[0106]
That is, in the first embodiment described above, the first, second,..., N-th information signals A, B,. , Rn are determined and the first, second,..., N-th information signals A, B,. The transfer rates Ra, Rb,..., Rn are determined by calculation. However, in the second embodiment of the present invention, the optical disk drive does not have a key input unit or a decode unit for decoding control data from the optical disk 13. , Nn information signals A, B,..., N at the time of recording, transfer rates Ra, Rb,. Through the block It is input.
[0107]
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 as described below, a recording command and a recording start address and the like. In addition to the above information, the transfer rate flag of the signal is transferred to the optical disk drive. This is decoded by the signal processing portion of the optical disk drive, and the recording process is performed as described above according to the type.
Next, in the case of a reproduction process, for example, a video signal recorded at a predetermined address of the optical disc 13 is reproduced according to a reproduction command based on the command system of the mount Fuji as described above. This data is interpreted by the host 32 and the transfer rate is calculated as described above. Then, for example, the host 32 transfers the content to the I / F section in the AV-ENDEC 20 to indicate that the video signal has a transfer rate of 2 Mbps, and adds the transfer rate flag of the signal to the reproduction command as described below. To transfer. This is decoded in the signal processing section, and the reproduction processing is performed as described above according to the transfer rate.
[0108]
Although the embodiment for performing the communication has been described using the ATAPI interface 31 for performing a communication connection with the outside, a standard such as IEEE 1394 may be used, and radio waves or light other than communication using such a cable may be used. Communication may be used. Although the signal to be recorded and reproduced is mainly described with respect to video data, it goes without saying that audio and music data, still images, sub-pictures, and decoded signals obtained by decoding these may be used. In other words, the transfer rate referred to here indicates a data transfer rate in a range that cannot be satisfied as information unless data is transferred at a certain range of transfer rate on average.
[0109]
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,..., N are recorded and / or reproduced. , N, priorities are assigned to the information signals A, B,..., N in accordance with the degree of importance, so that the transfer rate is changed during recording and / or reproduction, or a seek error occurs during a seek operation. .., N, and the information signals A, B,..., N are not continuous, the information signal having a lower priority may be truncated. When the recording operation on the optical disk 13 and the reproducing operation are combined, the recording operation of each of the information signals A, B,..., N is prioritized over the reproducing operation, so that the recording operation can be performed without failure. And the reproduction after recording becomes effective.
[0110]
Further, a part of the information signal recording and / or reproducing apparatus 10 of the first embodiment is modified, or a part of the information signal communication apparatus 30 of the second embodiment is modified to be used as the optical disk drive D side. The optical disk rotating means 11, 12, the optical pickup 14, the driver circuit 15, the preamplifier 16, and the servo circuit 17 are provided as a unit, while the signal processing circuit 18, the track / buffer memory 19, and the system controller 22 are united as the solid-state memory M side. The solid-state memory M may be detachably connected to the optical disk drive D and the ATAPI interface 31 by a connector (not shown). At this time, since the capacity of the track buffer memory 19 is 64 MB (64 megabytes), the audio signal can be reproduced for about 1 hour and the video signal can be reproduced for about 10 minutes.
[0111]
<Third embodiment>
FIG. 7 is a diagram for explaining a first recording mode when the relational expression (11) is not satisfied in the information signal recording device or the information signal communication device 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 for explaining 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.
[0112]
As described above, in the information signal recording device or the information signal communication device according to the present invention, the input first, second,..., N-th information signals A, B,. , 19n in the memory 19, and read out the information signals A, B,..., N from the track buffer memory 19 in a time-division manner. , B,..., N are time-divisionally recorded in the respective areas 13a, 13b,..., 13n on the optical disk 13 by the optical pickup 14, and the relational expression (Equation 11) described above is used. This must be satisfied, and this determination is made by the system controller 22. However, there are naturally cases where the relational expression (11) cannot be satisfied.
[0113]
Therefore, in the third embodiment, the structure of the optical disc 13 and the structure of the track buffer memory 19 are the same as those of the information signal recording device described in the first embodiment or the information signal communication device described in the second embodiment. When recording the input n information signals (information signals A, B,..., N) on the optical disc 13, the optical pickup 14 divides the n information signals into different areas on the optical disc 13. In the case where it is determined that the seek time is not enough to perform the recording, that is, when the relational expression (Equation 11) described above is not satisfied, any one of the first to third recording modes described below. It is characterized by selecting an aspect.
[0114]
First, in the first recording mode, when n input information signals (information signals A, B,..., N) do not satisfy the relational expression (Equation 11), recording is performed from the n information signals. The number of information signals to be reduced is reduced, and n ′ (where 2 ≦ n ′ <n) information signals are selected, and the relational expression (11) is again satisfied for the n ′ information signals. If the relational expression (Equation 11) is satisfied, n ′ information signals selected from the n information signals are stored in each area 19a, 19b,. , 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, weighting is performed automatically or by the user's setting according to the difference in the transfer rate 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. Can be recorded. Further, the (n−n ′) unselected information signals may be discarded without being temporarily stored in the track buffer memory 19.
[0115]
More specifically, the first recording mode will be described. As shown in FIG. 7, when the four types of information signals A, B, C, and D do not satisfy the relational expression (Equation 11), the input is performed. From the four types of information signals A to D, two types of information signals, A and B, are selected, and it is determined whether the A and B information signals satisfy Equation (11) again. , A and B (A1, B1, A2, B2) when the relationship between the transfer rate of the information signals of A, B and the transfer rate of the optical pickup 14 to the optical disk 13 and the seek time satisfies (Equation 11). ,...) Are temporarily stored in the track buffer memory 19, and the information signals of A and B are alternately read out from the track buffer memory 19 in a time-division manner, and the optical pickup 14 puts A1 in the A area. Data is recorded, and after recording, And, recording the data of B1 to B region, and records the data of A2 to seek again A2 region, by repeating this, resulting in A, continuously record the separate data on the area B.
[0116]
According to the first recording mode, the number of information signals to be recorded is reduced from the input n information signals, and n ′ (where 2 ≦ n ′ <n) information signals are selected. Since the 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-forwarding and skipping. In such a case, the remaining free area of each recording area is divided, and the management of 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.
[0117]
Next, in a modified example of the first recording mode, if the input n information signals (information signals A, B,..., N) do not satisfy the relational expression (11), the n information signals Is temporarily stored in the track buffer memory 19, and by connecting some of the n information signals to form a block, the information signals to be individually recorded among the n information signals are , An information signal to be recorded after being divided into blocks, is read out from the track buffer memory 19 in a time-division manner, and is recorded in the respective areas of the optical disk 13 by the optical pickup 14 in a time-division manner. The individual information signals are recorded in at least two or more areas on the optical disc 13 in a time-division manner.
[0118]
More specifically, a modified example of the first recording mode will be described. As shown in FIG. 8, when the four types of input information signals A, B, C, and D do not satisfy the relational expression (11). Selects two types of information signals, A and (B + C), to be blocked from the four types of input information signals A to D, and again selects (11) the A and (B + C) information signals. It is determined whether or not Expression (11) is satisfied. If Expression (11) is satisfied, the information signals of A and (B + C) are temporarily stored in the track buffer memory 19, and then from the track buffer memory 19. The information signals of A and (B + C) are read alternately in a time-division manner, the data of A1 is recorded in the A area by the optical pickup 14, the area is sought after recording, and the data of (B1 + C1) is recorded in the B area. Then, seek to the A2 area again, and Data is recorded, seek is performed between the areas after recording, (B2 + C2) data is recorded in the B area, and this is repeated. As a result, individual data is continuously stored in the A area and the block data is continuously stored in the B area. To record.
[0119]
According to the modification of the first recording mode, an information signal to be individually recorded and an information signal that may be blocked are selected from the input n information signals. Can be shortened, and the combined processing of the individual recording and the block recording can be performed according to the necessity of the information signal.
[0120]
Next, in the second recording mode, when the input n information signals (information signals A, B,..., N) do not satisfy the relational expression (Equation 11), the n information signals are tracked. After being temporarily stored in the buffer memory 19, the n information signals are read out from the track buffer memory 19 in a time-division order in the transfer order, and all the n information signals are read by the optical pickup 14 into the same area ( (One area).
[0121]
More specifically, the second recording mode will be described. As shown in FIG. 9, if the four types of input information signals A, B, C, and D do not satisfy the relational expression (Equation 11), A After temporarily storing the four types of information signals A to D in the track buffer memory 19, the information signals A to D are read out from the track buffer memory 19 in a time-division manner, and A1, B1, C1, D1, and A2 are read out. , B2, C2, D2,... Are recorded in the area A on the optical disk 13 by the optical pickup 14 without rearrangement.
[0122]
According to the second recording mode, the n information signals are recorded in the same area (one area) of the optical disk 13 by the optical pickup 14 in the order in which the n information signals are time-divisionally read out from the track buffer memory 19. At the time of reproduction, it is necessary to kick for each recording unit, and there is a possibility that stability in reproduction is 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.
[0123]
Next, in the third recording mode, when the input n information signals (information signals A, B,..., N) do not satisfy the relational expression (Equation 11), the n information signals are transmitted for a plurality of cycles. After that, the information is temporarily stored in the track buffer memory 19, and then rearranged in the track buffer memory 19 such that a plurality of cycles of each information signal are arranged as one unit. Information signals are read out from the track / buffer memory 19 in a time-division manner, and the n information signals are recorded in the same area (one area) on the optical disc 13 by the optical pickup 14 in a rearranged chunk. It is.
[0124]
More specifically, the third recording mode will be described. As shown in FIG. 10, when four types of input information signals A, B, C, and D do not satisfy the relational expression (Equation 11), A After temporarily storing the four types of information signals in the track buffer memory 19 for a plurality of cycles, the A1, B1, C1, D1, A2, B2, C2, The data transferred in the order of D2,... Are sorted in the order of A1, A2, B1, B2, C1, C2, D1, D2,. The information signals are read out in a time-division manner for each block of the information signal, and are read in the order of (A1, A2), (B1, B2), (C1, C2), (D1, D2),. Record in the area.
[0125]
According to the third recording mode, the recording unit of data recorded in the same area (one area) on the optical disc 13 is large, so that a somewhat stable operation during reproduction can be ensured, and the range of the continuous recording unit can be ensured. This is somewhat advantageous for trick play such as fast-forward or skip, and does not complicate the management of subsequent recording as in the first recording mode. Further, the information signal recording apparatus requires a somewhat large capacity of the track buffer memory 19, and such recording cannot be performed in a recording unit exceeding the track buffer memory 19.
[0126]
Here, in the above-described first to third recording modes, two recording modes are roughly divided, and the first recording mode is that n information signals are recorded on at least two or more areas on the optical disc 13. The above-described first recording mode (FIG. 7) and a modification of the first recording mode (FIG. 8) correspond to recording with a seek in between.
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).
[0127]
Each of the three types of recording methods according to the first to third recording modes has advantages and disadvantages. The recording mode can be selected based on the result of the above-described (Equation 11), or the user can arbitrarily select the recording mode. It is useful for the user to make selections or to use differently according to conditions, and a criterion for selecting any one of the first to third printing forms is based on any of the following a to f.
[0128]
a. When it is determined whether or not the n information signals can be recorded in different areas on the optical disc 13 according to the above (Equation 11), the recording is performed when it is determined that the n information signals cannot be recorded according to the (Equation 11). The number of information signals to be reduced is reduced, and it is determined whether or not Expression (11) is satisfied again. If Expression (11) is satisfied, the first recording mode is selected. The third recording mode is selected.
[0129]
b. The user selects the first to third recording modes. That is, when the user arbitrarily selects, when the above-described first recording mode is selected, for example, it is determined whether or not a plurality of information signals set in the above (Equation 11) can be recorded. , The first to third recording modes are displayed as 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]
c. When automatically selecting according to the type of information signal or source, for example, when n information signals are input from the AV-ENDEC 20, recording is performed in the first recording mode because the transfer rate at the time of compression can be set by the user. Do. When the data is input as a transport stream signal as a compressed information signal from a digital satellite or the Internet, recording is performed in the second or third recording mode. In addition, recording can be performed according to user settings according to a difference between transfer rates of a plurality of information signals to be recorded, a channel position (for example, NHK and commercial broadcasting), a genre of information signals (movie, animation, education), and the like.
[0131]
d. According to the specifications 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-mentioned (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 changeable and the capacity of the track buffer memory 19 is changeable, the first recording mode is selected if the capacity of the track buffer memory 19 is large. If the capacity of the track buffer memory 19 is small, the second or third recording mode is selected.
[0132]
e. The system controller 22 detects the type of the optical disc 13 and selects the first recording mode if a high-speed seek is possible according to the type, such as an HDD (fixed magnetic disk recording / reproducing device) or a DVD-RAM, In the case where some time is required for seeking like a DVD-RW, the second or third recording mode may be selected.
[0133]
f. The management area on the optical disc 13 is reproduced, and the status of the recordable area of the optical disc 13 is determined by the system controller 22. In the case where there is no vacant area that can be continuously recorded over a predetermined amount and vacant areas are scattered, the second or third recording mode may be selected.
[0134]
In addition, it can be selected according to various specifications other than the above a to f.
[0135]
【The invention's effect】
As described in detail above, according to the information signal reproducing apparatus, the information signal recording apparatus, and the information signal recording / reproducing apparatus according to the present invention, the first, second,... ,... Between the information signal recording medium for recording and / or reproducing in the n-th area and the buffer memory for temporarily storing the first, second,. When one head movable in the radial direction of the information signal recording medium transfers the data in a time-division manner at a constant transfer rate faster than the respective transfer rates, the transfer rate of one head to n information signals is ... Rp, the sum of the transfer rates of the n information signals ... ΣRn, the sum of the capacities of the n information signals ... ΣYn, each of the heads required to move from the current area to the next area on the information signal recording medium Sum of seek time ΣSn, the head The sum of the time required to move from the current signal layer to the next signal layer on the information signal recording medium is ΔFm, and the head reproduces a plurality of signals from one signal layer on the information signal recording medium. ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn) When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium, ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / Since the relational expression of (Rp−ΣRn) is satisfied, the maximum transfer capability of the information signal recording medium can be obtained, and the area of n information signals can be efficiently divided in the buffer memory. In addition to this, the user can smoothly obtain the function of continuously reproducing, continuously recording, or continuously recording and reproducing n information signals.
[0136]
Also, the transfer rate of one head 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, the head records the information signal The allowable seek time required to move from the current area to the next area on the medium: S, the sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm When the head reproduces a plurality of signals from one signal layer on the information signal recording medium, ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣRn), and When a plurality of signals are reproduced from a plurality of signal layers, the relational expression of ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn) is satisfied, so that the same effect as described above can be obtained. is there.
[0137]
Further, the transfer rate of one head 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 is the current on the information signal recording medium. The sum of the seek times required to move from one area to the next area... Sn and the sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium. When reproducing a plurality of signals from one signal layer on the information signal recording medium, ΣYn ≧ Rp × ΣRn × ΣSn / (Rp−ΣRn) When a plurality of signals are reproduced from, the relational expression of ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn) is satisfied, so that the same effect as described above can be obtained.
[0138]
Furthermore, according to the information signal recording device of the present invention, the information for recording and / or reproducing the first, second,..., N-th information signals in the first, second,. .. Between the signal recording medium and a buffer memory for temporarily storing the first, second,..., N-th information signals at the respective transfer rates. When time-divisionally transferred by one head at a constant transfer rate higher than the respective transfer rates, the transfer rate to n information signals by one head ... Rp, the sum of the transfer rates of the n information signals ... ΣRn, the sum of the capacities of 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. From the current signal layer on the medium Sum of the time required to move to the signal layer... ΣFm, and when the head reproduces a plurality of signals from one signal layer on the information signal recording medium, ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn ), When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium, and when the relational expression of ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn) is satisfied. The n information signals read out from the buffer memory in a time-division manner are recorded in a time-division manner in n areas on the information signal recording medium via a head. On the other hand, if the above relational expression is not satisfied, the n information signals are read out. The number of information signals to be recorded is reduced from among the information signals, and n ′ (where 2 ≦ n ′ <n) information signals are selected, and the above relational expression is again applied to the n ′ information signals. It is determined whether the condition is satisfied or not. If the relational expression is satisfied and recording is possible, n ′ information signals are recorded in a time-division manner on the n ′ areas on the information signal recording medium via the head, or if the above relational expression is not satisfied, Is designed to record n information signals in the same area on the information signal recording medium in a time-division manner via a head, so that the response when the above relational expression is not satisfied becomes clear. The usability of the signal recording device and the information signal communication device is improved.
[0139]
Furthermore, according to the information signal recording device of the present invention, the information for recording and / or reproducing the first, second,..., N-th information signals in the first, second,. .. Between the signal recording medium and a buffer memory for temporarily storing the first, second,..., N-th information signals at the respective transfer rates. When time-divisionally transferred by one head at a constant transfer rate higher than the respective transfer rates, the transfer rate to n information signals by one head ... Rp, the sum of the transfer rates of the n information signals ... ΣRn, the sum of the capacities of 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. From the current signal layer on the medium Sum of the time required to move to the signal layer... ΣFm, and when the head reproduces a plurality of signals from one signal layer on the information signal recording medium, ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn In the case where the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium, a buffer is provided based on a relational expression of ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn). A first recording mode in which n information signals read out from a memory in a time-division manner are recorded in at least two or more areas on an information signal recording medium through a head in a time-division manner; And a second recording mode for time-division recording in the same area on the information signal recording medium through the first and second recording modes, so that the first or second recording mode can be selected. Selection of recording mode 2 It can be determined by the type of the information signal to be recorded, by the user's selection, by the specification of the information signal recording device, by the type of the information signal recording medium, or can be recorded on the information signal recording medium. Since it is possible to select one of them depending on the condition of the area, it is also possible to clarify the countermeasure in the case where the above relational expression is not satisfied, thereby improving the usability of the information signal recording device and the information signal communication device.
[0140]
Furthermore, the buffer memory provided in any one of the information signal reproducing device, the information signal recording device and the information signal recording and reproducing device has n areas for temporarily storing n information signals, respectively. Since the information signals are divided according to the value of each transfer rate or the n information signals are divided according to the respective recording or reproducing modes, the efficiency of the buffer memory can be increased.
[0141]
Furthermore, according to the information recording medium of the present invention, the n information signals are recorded in advance in the n areas, respectively, and the n information signals are recorded by one movable head provided in the apparatus. Divide and reproduce and temporarily store n information signals at a fixed transfer rate in a buffer memory in the device, the transfer rate of the head to the n information signals, and the n information signals output from the buffer memory When a read-only information signal recording medium is formed so as to be able to reproduce the n information signals by absorbing the difference with each transfer rate of the above, the transfer rate of the head to the n information signals is Rp. , Rn, the sum of the capacities of the n information signals,..., Yn, each seek required for the head to move from the current area to the next area on the information signal recording medium. Total time ... ΣSn, the sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium... ΣFm, and the head outputs a plurality of signals from one signal layer on the information signal recording medium.再生 Yn ≧ Rp × ΣRn × ΣSn / (Rp−ΣRn), and when the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium, ΣYn ≧ Rp × Since it is formed so as to satisfy the relational expression of ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn), n information signals can be efficiently arranged in the read-only information signal recording medium.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an overall configuration of an information signal recording and / or reproducing apparatus according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing an information signal recording and / or reproducing apparatus according to a first embodiment of the present invention; The first, second,..., N-th information signals are recorded and / or reproduced in a time-division manner by one optical pickup between the second,. FIG.
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 timing chart showing a state in which first, second,..., N-th information signals are recorded on an optical disc in a time-division manner by one optical pickup.
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 apparatus 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 apparatus 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 apparatus according to the present invention.
FIG. 10 is a diagram for describing a third recording mode when the relational expression (11) is not satisfied in the information signal recording apparatus according to the present invention.
FIG. 11 is a diagram showing a signal layer and an address arrangement of an optical disc having a plurality of signal surfaces.
FIG. 12 is a diagram showing a state in which a signal layer of an optical disk having a plurality of signal surfaces is reproduced or recorded on an optical disk in a time division manner by a single optical pickup with respect to first, second, and n-th information signals.
[Explanation of symbols]
10 ... information signal recording and / or reproducing device,
13 ... information signal recording medium (optical disc),
13a: first area, 13b: first area, 13n: n-th area,
14 ... Head (optical pickup),
19 Track / buffer memory
19a: first region, 19b: first region, 19n: nth region,
20 audio / video / encoder / decoder (AV-ENDEC),
26a to 26n: input terminals,
30 information signal communication device,
31: ATAPI interface, 32: Host,
41: satellite broadcast receiving antenna, 42: digital satellite decoder unit,
44: stream converter, 45: internet terminal.

Claims (12)

rotating an information signal recording medium having at least first and second signal layers that can be read from one direction, where n information signals (where n is an integer of 2 or more) are recorded at n positions, respectively; When,
Temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Transferring in a time-division manner;
Absorbing the difference between the transfer rate to the n information signals by the head and the transfer rate of the n information signals output from the buffer memory in the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
And reproducing the n information signals from the information signal recording medium in a time-division manner by satisfying the following relationship: Temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Recording the n information signals read from the buffer memory at a constant transfer rate faster than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input to the buffer memory by the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
And recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner, satisfying the following relational expression: At least one of n (where n is an integer of 2 or more) information signals is recorded, and at least a first and a first information signal that can be read from one direction for recording and reproduction for reproducing the remaining information signals. Rotating an information signal recording medium having two signal layers;
Temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Recording the information signal input to the buffer memory from one head on the information signal recording medium at a constant transfer rate faster than the transfer rate of the information signal;
Transferring the information signal reproduced by the head from the information signal recording medium to the buffer memory at the constant transfer rate faster than the transfer rate of the signal;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording and reproducing the n information signals on the information signal recording medium by satisfying the following relational expression: rotating an information signal recording medium having at least first and second signal layers that can be read from one direction, where n information signals (where n is an integer of 2 or more) are recorded at n positions, respectively; When,
Temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Transferring in a time-division manner;
Absorbing the difference between the transfer rate to the n information signals by the head and the transfer rate of the n information signals output from the buffer memory in the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Reproducing the n information signals from the information signal recording medium in a time-division manner by satisfying the following relational expression: Temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Recording the n information signals read from the buffer memory at a constant transfer rate faster than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input to the buffer memory by the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner by satisfying the following relational expression: At least one of n (where n is an integer of 2 or more) information signals is recorded, and at least a first and a first information signal that can be read from one direction for recording and reproduction for reproducing the remaining information signals. Rotating an information signal recording medium having two signal layers;
Temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Recording the information signal input to the buffer memory from one head on the information signal recording medium at a constant transfer rate faster than the transfer rate of the information signal;
Transferring the information signal reproduced by the head from the information signal recording medium to the buffer memory at the constant transfer rate faster than the transfer rate of the signal;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording and reproducing the n information signals on the information signal recording medium by satisfying the following relationship: rotating an information signal recording medium having at least first and second signal layers that can be read from one direction, where n information signals (where n is an integer of 2 or more) are recorded at n positions, respectively; When,
Temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Transferring in a time-division manner;
Absorbing the difference between the transfer rate to the n information signals by the head and the transfer rate of the n information signals output from the buffer memory in the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Reproducing the n number of information signals from the information signal recording medium in a time-division manner by satisfying the following relational expression: Temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Recording the n information signals read from the buffer memory at a constant transfer rate faster than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input to the buffer memory by the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording the n information signals from the buffer memory on the information signal recording medium in a time-division manner, the information signal recording program being recorded on the information signal recording medium. recoding media. At least one of n (where n is an integer of 2 or more) information signals is recorded, and at least a first and a first information signal that can be read from one direction for recording and reproduction for reproducing the remaining information signals. Rotating an information signal recording medium having two signal layers;
Temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Recording the information signal input to the buffer memory from one head on the information signal recording medium at a constant transfer rate faster than the transfer rate of the information signal;
Transferring the information signal reproduced by the head from the information signal recording medium to the buffer memory at the constant transfer rate faster than the transfer rate of the signal;
Absorbing the difference between the transfer rate of the head to the n information signals and the transfer rate of the n information signals input / output to / from the buffer memory by the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Recording and reproducing the n information signals on the information signal recording medium while satisfying the relational expression (1). A means for rotating an information signal recording medium having at least first and second signal layers readable from one direction, in which n information signals (where n is an integer of 2 or more) are recorded at n positions. When,
Means for temporarily storing the n information signals in a buffer memory, and outputting the n information signals temporarily stored from the buffer memory at respective transfer rates;
The n information signals are reproduced by the one head from the information signal recording medium in a time-division manner, and the n information signals are transferred to the buffer memory at a constant transfer rate faster than at the time of output from the buffer memory. Means for time-division transfer;
Means for absorbing 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 output from the buffer memory;
A transfer rate of the n information signals transferred from the head to the buffer memory... Rp;
Sum of transfer rates for outputting the n information signals from the buffer memory...
Sum of information unit amounts for transferring the respective reproduction information unit amounts of the n information signals from the head to the buffer memory...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium... {Sn,
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Means for reproducing the n information signals from the information signal recording medium in a time-division manner by satisfying the following relationship: Means for temporarily storing n information signals (where n is an integer of 2 or more) input at each transfer rate in a buffer memory;
Means for rotating an information signal recording medium having at least first and second signal layers readable from one direction and having n positions for recording the n information signals, respectively;
Means for recording the n information signals read from the buffer memory at a constant transfer rate faster than the respective transfer rates at the n positions on the information signal recording medium by one head in a time-division manner;
Means for absorbing, by the buffer memory, a difference between a transfer rate of the head to the n information signals and a transfer rate of the n information signals input to the buffer memory;
A transfer rate of the n information signals to be transferred from the buffer memory to the head;
Sum of transfer rates for inputting the n information signals to the buffer memory...
Sum of each recording information unit amount of the n information signals...
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Means 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: At least one of n (where n is an integer of 2 or more) information signals is recorded, and at least the first and / or first information signals that can be read from one direction for recording and reproduction for reproducing the remaining information signals. Means for rotating an information signal recording medium having two signal layers;
Means for temporarily storing the n information signals in a buffer memory, and inputting and outputting the information signal for recording on the information signal recording medium and the information signal for reproduction to and from the buffer memory at respective transfer rates When,
Means for recording the information signal input to the buffer memory at a constant transfer rate higher than the transfer rate of the information signal on the information signal recording medium from one head,
Means for transferring the information signal reproduced by the head from the information signal recording medium to the buffer memory at the constant transfer rate higher than the transfer rate of the signal in a time-division manner;
Means for absorbing 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 input / output to / from the buffer memory;
A transfer rate of the n information signals input / output to / from the buffer memory by the head;
Sum of transfer rates for inputting / outputting the n information signals to / from the buffer memory... Rn,
Sum of unit amounts of recording / reproducing information of the n information signals ... ΣYn,
Sum of each time required for the head to move from the current position to the next position on the information signal recording medium ... {Sn
Sum of the time required for the head to move from the current signal layer to the next signal layer on the information signal recording medium: ΔFm, (n ≧ m ≧ 2)
When the head records and reproduces a plurality of signals from one signal layer on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × ΣSn / (Rp-ΣRn)
When the head records and reproduces a plurality of signals from a plurality of signal layers on the information signal recording medium,
ΣYn ≧ Rp × ΣRn × (ΣSn + ΣFm) / (Rp-ΣRn)
Means for recording and reproducing the n information signals on the information signal recording medium by satisfying the following relational expression:

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