WO2006046489A1

WO2006046489A1 - Information recording method and device, information reproducing method and device, information recording program and information reproducing program

Info

Publication number: WO2006046489A1
Application number: PCT/JP2005/019426
Authority: WO
Inventors: Tsuyoshi Hasebe
Original assignee: Pioneer Corporation
Priority date: 2004-10-27
Filing date: 2005-10-21
Publication date: 2006-05-04
Also published as: JP4576388B2; JPWO2006046489A1

Abstract

First information from a first information source and second information from a second information source are directly recorded in parallel in real time in an optical disc having a double layer structure. In information recording in the optical disc (31) provided with a first layer recording layer (L1) and a second layer recording layer (L2), a process of reading out the first information of a first prescribed quantity from a buffer memory and writing such information in the first layer (L1) is performed every time the first information from the first information source is accumulated for the first prescribed quantity in the buffer memory, and a process of reading out the second information of a second prescribed quantity from the buffer memory and writing such information in the second layer (L2) is performed every time the second information from the second information source is accumulated for the second prescribed quantity in the buffer memory. Thus, the first information (A+C+E+G+…) and the second information (B+D+F+H+…) can be recorded in the same optical disc (31) at the same time in parallel.

Description

Specification

Information recording method and apparatus, information reproducing method and apparatus, information recording program, and information reproducing program

Technical field

The present invention relates to an information recording method and apparatus for recording information on an optical disc having multiple recording layers, and in particular, records each of a plurality of information such as a plurality of programs on each layer simultaneously in real time. The present invention relates to an information recording method and apparatus, and an information recording program.

The present invention also relates to an information reproducing method and apparatus for reproducing information recorded on an optical disc having multiple recording layers, and in particular, each of a plurality of information such as a plurality of programs is recorded for each layer. The present invention relates to an information reproduction method and apparatus for reproducing a plurality of pieces of information from each layer simultaneously and in real time, and an information reproduction program.

Background art

[0003] Recent advances in the technology of large-capacity optical disks such as DVD (Digital Versatile Disk) —R, DVD—RW, DVD—RAM, DVD + R,... In addition to a multilayer structure such as a layer structure, etc., the focus position of the optical pickup that writes and reads information on the recording layer is variably controlled, and the information recording capacity is doubled, quadrupled, and so on. This makes it possible to record multiple programs on one optical disc.

[0004] As described in, for example, Patent Document 1 below, a large-capacity optical disc has a recording layer of each layer provided in a spiral shape with the central portion of the disc also directed toward the peripheral portion. After information is recorded on the (or upper) recording layer, information is recorded on the upper (or lower) recording layer. Further, in the examples shown in FIGS. 7 and 8 of Patent Document 1, the spiral recording layer of each layer is divided into a plurality of zones by directing the force from the center of the disk to the periphery, and first the first zone in the center. Then, recording is performed on the lower and upper recording layers of the recording medium, and then recording is performed on the lower and upper recording layers of the second zone. [0005] Patent Document 1: JP 2002-150607 A

Disclosure of the invention

Problems to be solved by the invention

[0006] However, since the recording speed to the optical disk is slower than the hard disk, the DVD recording / reproducing apparatus has recently become widespread, and the hard disk in addition to the optical disk is mounted so that the information to be recorded can be stored on the node disk. After recording, the recorded information on the hard disk is copied to an optical disk.

[0007] Since such a DVD recording / playback apparatus has a high recording speed to the hard disk, for example, multiple programs with different tuner capabilities are extracted, and information on multiple programs is simultaneously recorded in parallel on a node disk. can do. On the other hand, since the recording speed to the optical disk is lower than that of the hard disk, it is difficult to simultaneously record a plurality of information such as a plurality of programs directly on the optical disk in real time without using the hard disk.

[0008] The recording speed of DVD-type optical discs in recent years has been improved, and it has become possible to record information on a single program in real time directly on an optical disc without going through the node disc. However, in order to simultaneously record a plurality of information such as a plurality of programs on an optical disc in real time in parallel, it is necessary to newly develop a method for recording on a plurality of recording layers. Similarly, in order to simultaneously reproduce a plurality of recorded information such as a plurality of programs, it is necessary to develop a new reproduction method.

[0009] An example of a problem to be solved by the present invention is a problem that a plurality of information such as a plurality of programs are recorded on an optical disc directly and simultaneously in real time. Similarly, a problem of simultaneously reproducing a plurality of pieces of information such as a plurality of programs recorded on the optical disc can be cited as an example.

Means for solving the problem

[0010] The information recording method according to claim 1 is the information recording method on the optical disk having the first recording layer and the second recording layer, wherein the first information having the first information source is stored in the nota memory. Each time the first predetermined amount is accumulated, the first predetermined amount of the first information is read from the buffer memory and written to the first layer, and the second information from the second information source is stored in the buffer memory. 2. Each time a predetermined amount is accumulated, the second predetermined amount of the second information is read from the buffer memory and written to the second layer.

[0011] An information recording apparatus according to claim 4 is an information recording apparatus for an optical disk having a first recording layer and a second recording layer, wherein the first information having the first information source is stored in the nota memory. Each time the first predetermined amount is accumulated, the first predetermined amount of the first information is read from the buffer memory and written to the first layer, and the second information from the second information source is stored in the buffer memory. Control means for performing a process of reading the second predetermined amount of the second information from the buffer memory and writing it in the second layer each time a predetermined amount is accumulated.

[0012] The information reproducing method according to claim 7 is the information reproducing method for reading and reproducing information from an optical disc having a first recording layer and a second recording layer, wherein the information is read from the first layer. Each time the first predetermined amount is stored in the first information buffer memory, the first predetermined amount of the first information is read from the buffer memory, and the second information read from the second layer is the buffer memory. Each time a second predetermined amount is stored, a process of reading the second predetermined amount of the second information from the buffer memory is performed.

[0013] An information reproducing apparatus according to claim 10 is an information reproducing apparatus for reading and reproducing information from an optical disk having a first recording layer and a second recording layer, and reading from the first layer. Each time a first predetermined amount is accumulated in the first information buffer memory, a process for reading the first predetermined amount of the first information from the buffer memory and a second information force read from the second layer in the S buffer memory Control means for performing a process of reading out the second predetermined amount of the second information from the buffer memory each time a second predetermined amount is accumulated.

[0014] An information recording program according to claim 13 is an information recording program executed by the control means of the information recording apparatus, and is an optical disk having a first recording layer and a second recording layer. In the information recording program for recording information, the first predetermined amount of the first information is read from the buffer memory each time the first predetermined amount of the first information source power is accumulated in the buffer memory, and the buffer memory stores the first information. A first processing step for writing to the first layer; and whenever a second predetermined amount of second information from the second information source is stored in the buffer memory, the second predetermined amount of the second information is read from the buffer memory. A second processing step for writing to the second layer; and a third processing step for performing the first processing step and the second processing step. The

[0015] An information reproduction program according to claim 14 is an information reproduction program executed by the control means of the information reproduction apparatus, and is applied to an optical disk having a first recording layer and a second recording layer. In an information reproduction program for reading and reproducing recorded information, a first predetermined amount of the first information read from the first layer is accumulated from the buffer memory each time a first predetermined amount is accumulated in the buffer memory. A first processing step for reading one information, and a second reading of the second predetermined amount of the second information from the buffer memory each time a second predetermined amount of second information read from the second layer is accumulated in a buffer memory. And a third processing step for performing the first processing step and the second processing step.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of a system configuration for using an information recording / reproducing apparatus according to an embodiment of the present invention. In the illustrated example, a display device 101 and a TV tuner 102 are placed in a room X, and a display device 103 and the information recording / reproducing device 10 according to the present embodiment are placed in a room Y. A person in room X is watching program # 1 selected by tuner 102, and a person in room Y is watching program # 2 selected by a tuner (not shown) built in information recording / reproducing apparatus 10.

[0017] This information recording / reproducing apparatus 10 is equipped with an optical disk having two recording layers, acquires information of program # 1 from the tuner 102, and directly records it in real time on the first recording layer. At the same time, the yarn and # 2 information obtained from the tuner within the second layer can be directly recorded in real time. Of course, if two tuners are mounted in the information recording / reproducing apparatus 10, the tuner 102 shown in the figure is unnecessary.

[0018] Further, the information recording / reproducing apparatus 10 reproduces the recording information of the optical disc in which the program # 1 is recorded in the first layer and the program # 2 is recorded in the second layer by a recording method described later. The recorded information of program # 1 can be reproduced and displayed on display device 101, and at the same time, the recorded information of program # 2 can be reproduced and displayed on display device 103.

FIG. 2 shows a system configuration of another form of the information recording / reproducing apparatus according to the embodiment described above. FIG. In the system shown in FIG. 1, the information recording / reproducing apparatus 10 shows an example of recording (recording) TV program information, but the information recorded on the optical disc is not limited to video and audio information, and can be digitally recorded. Any information is acceptable.

In the system configuration shown in FIG. 2, a plurality of PCs (PCs) 104 and 105 are connected via a LAN or the like, and in the illustrated example, two PCs (PCs) 104 and 105 are connected, and an information recording / reproducing device 30 is connected to one PC 105. ing. This information recording / reproducing apparatus 30 is different from the information recording / reproducing apparatus 10 shown in FIG. 1 in that only the optical disk drive unit is required, and the optical disk inserted in the optical disk drive apparatus (information recording / reproducing apparatus) 30 is connected to the PC 105. The application software sends a command to directly record the information acquired from the PC104 in real time on the first recording layer, and at the same time record the information acquired from its own PC105 in the second recording layer. it can. The playback is the same as in Fig. 1.

Next, the configuration of the information recording / reproducing apparatuses 10 and 30 and the recording / reproducing method will be described.

Note that the information to be recorded / reproduced is not limited as described above, but in the following, a plurality of information to be recorded / reproduced will be described as program # 1 information and program # 2 information. To do.

FIG. 3 is a block configuration diagram of the information recording / reproducing apparatus 10. The information recording / reproducing apparatus 10 is composed of a system control unit 20 and an optical disc drive apparatus 30 such as a DVD-RZRW, and the two are connected by an ATAPI cable 40, for example. In FIG. 2, the system control unit 20 is realized by application software that runs on the PC 105 except for the CPU.

[0023] The system control unit 20 is configured by hardware in the present embodiment, and simultaneously takes in the video signal and audio signal of the program # 1 from an information source such as a CPU 21 that controls the system control unit 20 and a tuner. An MPEG encoder 22 that takes in video and audio signals of program # 2 from another information source and converts each program information into MPEG data, and an encryption unit 23 that encrypts MPEG data encoded by the MPEG encoder 22; , The signal control unit 24 for transferring the MPEG data encrypted by the encryption unit 23 to the optical disc drive device 30 and two pieces of information transferred from the optical disc drive device 30 during reproduction (program # 1 ', program # 2 ') Is captured by the signal control unit 24 and encrypted by the encryption unit 23. And an MPEG decoder 25 for decoding after being read.

In this embodiment, the optical disk drive device 30 includes a spindle motor 32 that rotationally drives an optical disk 31 such as a DVD-R ZRW having two recording layers, and information is written to the optical disk 31 or recorded information on the optical disk 31. The optical pickup (PU) 33 that reads out the data, the CPU 34 that controls the optical disk drive device 30 centrally, the ATAPI interface 35 that is connected by the signal control unit 24 of the system control unit 20 and the ATAPI cable 40, and the command control by the CPU 34 Servo control unit 36 that drives and controls spindle motor 32 and pickup 33, and program # 1, # 2 information obtained via ATAPI interface 35 during recording and signal processing to output to pickup 33, and output from pickup 33 during playback And a signal processing unit 37 that reads the processed signal and outputs it to the ATAPI interface 35.

The signal processing unit 37 is provided with a recording / playback buffer memory 38. When the recording target information signal-processed by the signal processing unit 37 is stored in the buffer memory 38 by a predetermined capacity. When the stored information is output from the buffer memory 38 to the pickup 33 and the read information of the optical disk 31 is stored in the buffer memory 38 by a predetermined capacity, the stored information is read from the S buffer memory 38 and is read by the signal processing unit 37. After signal processing, it is output to ATAPI interface 35.

FIG. 4 shows a recording method and reproduction on an optical disc 31 having two recording layers (the first layer (lower layer) is “L1” and the second layer (upper layer) is “L2”). It is explanatory drawing of a method. The optical disc 31 is provided with a recording layer in a spiral shape from the center to the periphery. This recording layer has a two-layer structure, and is composed of a lower layer L1 and an upper layer L2. Program # 1 information is recorded in the lower layer L1, and program # 2 information is recorded in the upper layer L2.

[0027] Since the information of program # 1 and the information of program # 2 need to be recorded simultaneously in real time, in the example shown in the figure, the recording target information A of program # 1 is stored in the buffer memory 38 by a predetermined capacity. When it is accumulated, first, the information A of program # 1 of nota 38 is written to the lower layer L1 and started. During this writing, it is stored in the recording target information buffer memory 38 of program # 2.

[0028] After information A of program # 1 is recorded in lower layer L1, information B of program # 2 is then transferred to upper layer L2. To record. For this reason, it is necessary to move the focus position of the pickup 33 from the recording layer L1 to the recording layer L2 (focus jump). Similarly, the track position of the pickup 33 at the end of the recording of the information A is shifted from the recording start position of the information B because the recording layer is provided in a spiral shape. Therefore, it is necessary to move the track position of pickup 33 to the recording start position of information B (track jump). Therefore, after the information A of program # 1 is recorded in the lower layer L1, the focus jump and the track jump are performed, and then recording of the predetermined amount of information B of the program # 2 is started in the upper layer L2.

[0029] After the recording of information B is completed, a predetermined amount of information C following information A of program # 1 is read from the buffer memory 38, and the focus jump is performed to adjust the focus position of the pickup 33 to the lower layer L1 and the track. Jump to align the writing position with the writing end position of information A, and write information C to lower layer L1. Thereafter, in the same manner, information A, C, E, G,... For each predetermined capacity constituting program # 1 is written in lower layer L1, and information B, D, F, H, for each predetermined capacity constituting program # 2 is written. Write… to upper layer L2.

Note that in the example shown in FIG. 4, the writing process is alternately performed on the lower layer L1 and the upper layer L2 in the order of information A → information B → information C → ……. For example, it is possible to perform a writing process such as information A → information C → information B → information E → ……!

[0030] This makes it possible to record two pieces of program information directly and in parallel on an optical disk in real time without having to record programs # 1 and # 2 on a high-speed hard disk as in the prior art. It becomes. When reading and playing back the information of programs # 1 and # 2 recorded on the optical disc, as shown in Fig. 4, by reading information A → information B → information C → …… in order, It becomes possible to reproduce the information of two programs # 1 and # 2.

[0031] The optical disc 31 described above is a parallel optical disc that reads information from the second layer (upper layer L2) from the inner periphery side to the outer periphery side in the same manner as the first layer (lower layer L1). There is also an opposite type optical disc that reads signals from the outer circumference side to the inner circumference side when reproducing information on the layer (upper layer L2).

[0032] Also in this opposite type optical disc, the information recording / reproducing devices 10 and 30 in the embodiment of the present invention are recorded by the recording method and the reproducing method as described below. Record 'playback can be performed.

FIG. 5 is an explanatory diagram showing an example of a recording method on the opposite optical disc 41 by the information recording / reproducing apparatuses 10 and 30, and FIG. 6 is an explanatory diagram showing an example of the reproducing method.

[0033] As shown in FIG. 5, the direction of program # 2 on the opposite optical disc 41 is

Recording is performed so that the direction of the program # 2 on the parallel optical disc 31 is reversed. The parallel type optical disc 31 normally reproduces continuously from the outer peripheral part to the inner peripheral part. However, in the case of the opposite type optical disc 41, as shown in FIG. Reproduce.

That is, in FIG. 6, after reading the information B in the first recorded information, the information jumps to the head position of the second recorded information D as shown in (1) and the information D is read out. After that, as shown in (2), the track jumps to the beginning of the third recorded information F and reads out the information F. Then, as shown in (3), the fourth recorded information H Read the information H by jumping to the beginning of the track. In the same way, information is read out to the outer periphery side and program # 2 is played back.

As described above, the recording method and the reproducing method for the opposite optical disc 41 can be recorded and reproduced in the DVD-VR format, for example.

[0035] FIG. 7 is an explanatory diagram of the buffer amount of the buffer memory that stores the information of programs # 1 and # 2.

When the recording speed Vo of the optical disc drive device 30 and the data rate Vi to the recording layers LI and L2 are in a relationship of Vo = 2 XVi, as shown in FIG. 7, to the lower layer L 1 in the noffer memory 38 When the write information in the lower layer L1 is finished and the amount of information to be written in the upper layer L2 in the nota memory 38 reaches the predetermined capacity, the force jump and the track jump are performed immediately. Need to start writing to upper L2

[0036] However, it takes time to perform track jump and focus jump, and in the state shown in Fig. 7, there is no time, so program # 1 and # 2 can be written simultaneously. (Or read) processing will fail.

FIG. 8 is an explanatory diagram of the buffer amount when the recording speed Vo is Vo = 4 XVi. In this case, the recording layer L2 (or L1) is still written at the end of recording on the recording layer L1 (or L2). Since the amount of information stored in the buffer does not reach the predetermined amount, there is time to perform track jump and focus jump. Therefore, it is possible to simultaneously record and reproduce programs # 1 and # 2 on the optical disc 31.

[0038] A range indicated by arrows a ', a, and c in FIG. 8 is sufficient in terms of time, and in the illustrated example, a' = a / 2 and a = c = lt. In order to increase the initial time margin a ′, for example, a = 5tZ7, b = l ltZ7, and c = 9tZ7 in order to set a ′ = a. At this time, the relationship between the initial buffer capacity Ml of program # 1 and the initial buffer capacity M2 of program # 2 is Ml = 7 (M2) Zl l.

FIG. 9 is an explanatory diagram of the buffer amount when a ′ = a = b = c. At this time, the relationship between the initial buffer capacity Ml of program # 1 and the initial buffer capacity M2 of program # 2 is M2 = 2 × M1. This approach makes it easier to allocate buffers than in the case of Figure 8.

[0040] If the memory capacity (total buffer capacity) of the buffer memory 38 is 2 MByte, for example, and 1 MByte is allocated as the buffer capacity for the programs # 1 and # 2, respectively, the initial buffer capacity M1 = 0 in the case of FIG. 5MByte, M2 = 1MByte, and when both lower layer LI and upper layer L2 are recorded from the innermost circumference (24mm), the track jump distance is 16ECC (512KZ32K), that is, 7.127 / zm (about 10 tracks at the innermost circumference) ), 2.869 m (about 4 tracks) at the outermost circumference. Figure 10 shows an example of the relationship between the address, track jump distance, number of tracks, and time required for a track jump for a typical two-layer DVD disc.

Here, if the data rate Vi = 10 Mbps and the recording speed Vo = 40 Mbps, 2t = 200 ms. In the case of Fig. 9, if a recording jump is made to the recording start position to another recording layer within a time margin of 2t = 200ms and the recording preparation is made by preparing the recording preparation, two programs can be real-time in parallel. Recording and playback are possible.

[0042] The embodiment of FIGS. 8 and 9 is a case where the data rates to the first layer (L1 layer) and the second layer (L2 layer) are equal, but the data rates to each layer are different. There is also. FIG. 11 is an explanatory diagram of the buffer amounts when the data rates are different. In the example shown, the data rate to the first layer (L1 layer) is Vil, the data rate to the second layer (L2 layer) is Vi2, and Vo = 2 XVil and Vo = 4 X Vi2 Show the case! /

[0043] Now generally, Vo = a XVil

Vo = b XVi2

However, excluding a≥2, b≥2, b≥a, a + b <4, and a = b = 2,

TO = Tl X b / a

(b- l -b / a) Tl = 2t

T, = [(b-1) Tl t] Za.

[0044] When the relationship with the buffer amount is obtained,

Total buffer size M = Vil X (a-l) T0 + Vi2 X (b- l) Tl

M = Vo XTO X ((a-l) bb + (b-l) aa) Zabb, so determine the buffer size for program # 1 and the buffer size for program # 2 to satisfy this! ,.

[0045] In the example shown in FIG. 11, if the total buffer size is 2 MByte, the predetermined buffer size for program # 1 Ml = l. 14 MByte, the initial buffer size for program # 1 Ml, = 0.72 MByte, Predetermined buffer size for program # 2 M2 = 0.992 MByte. When both the first layer L1 and the second layer L2 are recorded from the innermost circumference (24 mm), the recording positions of both are separated as they go to the outer circumference. This is illustrated in FIG.

If recording is performed up to the outermost circumference in this state, a difference of 8435 tracks is generated as the number of tracks. If Vil = 20 Mbps, Vi2 = 10 Mbps, Vo = 40 Mbps, t = 114 ms. With a 4x DVD drive, it is difficult to move 8435 tracks in 114 ms. If the speed difference between Vil and Vi2 is large, simultaneous parallel recording and playback will be strict. Of course, the recording time is short and there is no need to record to the outermost circumference!

[0047] The above example shows a limit data rate difference when using a quadruple speed drive device. If the data rate difference is small, no problem occurs, and simultaneous real-time recording, Playback is possible.

[0048] For example, when Vil = 10 Mbps, Vi2 = 8 Mbps, Vo = 40 Mbps, and total buffer amount M = 2 MB yte, a = 4, b = 5, t = 316.5 ms, Ml = l. 079MByte, Ml ' = 0. 566M Byte, M2 = 0.92MByte. When recording to the outermost circumference under these conditions, the force seek time that causes a difference of 4914 tracks in the number of tracks is 114 ms or less in actual measurement, so there is no failure in simultaneous recording and playback of real time. ,. [0049] Same [Vil = 20 Mbps, Vi2 = 13. 33 Mbps, Vo = 40 Mbps, total noferer amount M = 2 MByte, a = 2, b = 3, t = 70.6 ms, Ml = l. 056 MByte , Ml '= 0.617 MByte, M2 = 0.94 MByte, and recording to the outermost circumference results in a difference of 3657 tracks. In this case, there is no failure in simultaneous recording and reproduction.

FIGS. 13 and 14 are flowcharts showing an embodiment of a processing procedure in the information recording / reproducing apparatus for realizing the information recording method described with reference to FIGS. The CPU 21 of the system control unit 20 shown in FIG. 3 executes the process of FIG. 13, and the CPU 36 of the optical disk drive device 30 executes the process of FIG.

In FIG. 13, the CPU 21 first confirms or acquires information about the recording speed Vo of the optical disk drive device 30, the two data rates Vil and Vi 2, and the total buffer amount M, and uses the data for L 1 and L 2. Buffer areas Ml and M2 and margin time t are calculated (step SI).

Next, the CPU 21 confirms the recording start positions of the layers LI and L2, and calculates the maximum track difference Tr when recording up to the outermost periphery of the optical disc 31 is assumed (step S2). Then, it is determined whether or not it is possible to move the maximum track number difference Tr within the margin time “t” (step S3). If the movement is impossible, the process ends with an error (step S4).

If it is possible to move, the process proceeds to step S5, where simultaneous recording is started. That is, the CPU 36 of the optical disk drive device 30 is instructed to perform simultaneous recording, and the CPU 36 is instructed to set the buffer amounts Ml and M2, from the signal control unit 24 for the recording target data for each layer L1 and L2. Start transfer to ATAPI interface 35. Thereafter, data transfer is always performed at a constant rate.

After step S 5, as shown in FIG. 14, the CPU 36 of the optical disk drive device 30 that receives the simultaneous recording instruction from the CPU 21 stores the transferred data size or the data stored in the buffer memory 38. Monitor the accumulated amount (buffer amount) (Step Sl l). Then, the pickup 33 is moved to the recording layer to be written (in this case, the first layer L1) (step S12), and whether or not the buffer accumulation amount of the recording target data (program # 1 data) has reached Ml. Is determined (step S13).

[0055] If the determination result in step 13 is negative (No), the process proceeds to step S14, in which it is determined whether or not the cache is flushed. If the determination result is negative, the process returns to step S13. The If you want to flush the cache, proceed from step S14 to step SI5, write the data in the buffer to the optical disc 31, and switch to normal recording mode (recording mode other than simultaneous recording mode) This process ends.

If the determination result in step S 13 is affirmative (Yes), the process proceeds to step S 16, and the stored data in the notfer is read and written to the optical disc 31. Then, it waits for the end of writing (step S17), and when the writing ends, it returns from step S17 to step S12.

In step S 12 advanced this time, since the previous writing layer is the L1 layer, a focus jump and a track jump to the L2 layer are performed. In step S13, it is determined whether or not the buffer # of the data of program # 2 has reached M2, and if so, program # 2 information is written in the second layer L1. Similarly, program # 1 and # 2 are recorded simultaneously in real time.

[0058] The optical disc 31 in which the program # 1 is recorded in the first layer L1 and the program # 2 is recorded in the second layer L2 is inserted into the optical disc drive device 30, and the information of both programs is reproduced simultaneously. In this case, as in the recording order, information A → information B → information C →... Are sequentially read out through the buffer memory 38 as shown in FIG. Then, on the optical disk drive device 30 side or the system control unit 20 side, information A, C, E,... Is rearranged to reproduce program # 1 information, and information B, D, F,. Play program # 2 information and output it from MPEG decoder 25 to an external device.

Next, another embodiment of the processing procedure in the information recording / reproducing apparatus for realizing the information recording method described in FIGS. 8 to 12 will be described. Another embodiment described below is an embodiment characterized in that the system controller 20 performs rate conversion of input data.

FIG. 15 is a flowchart showing another embodiment of the processing procedure in the information recording / reproducing apparatus for realizing the information recording method according to the present invention.

The CPU 21 of the system control unit 20 shown in FIG. 3 executes the processing of FIG. Note that the processing executed by the CPU 36 of the optical disk drive device 30 is the same as the flow of FIG. 14 in the above-described embodiment, and its illustration and description are omitted.

In FIG. 15, the CPU 21 first records the recording speed Vo of the optical disc drive device 30 and 2 Information confirmation or information acquisition of the two data rates Vil, Vi2 and the total buffer amount M is performed, and buffer areas Ml, M2 and margin time “t” for L1, L2 are calculated (step S21). Next, it is determined whether or not the margin time “t” calculated in step S21 is sufficient (step S22).

At this stage, since the number of moving tracks is not fixed, it is sufficient that the minimum necessary time can be secured. For example, referring to the table in FIG. 10, in the case of a track power of ^, 44 ms is required as the travel time to the upper or lower layer. As an example of the criterion in step S22, the margin time is “ Determine if "t" is 44ms or more (or you can take a margin and make it more than 50ms! /, ...).

[0061] If the margin time “t” is sufficient (when the determination result in step S22 is negative (No)), the input data rate Vil, Vi2 is set so that the margin time “t” becomes a sufficient value. Both or either of them is lowered (step S23).

If the determination result in step S22 is affirmative (Yes) and the allowance time “t” is sufficient, or if the allowance time “t” is set to a sufficient value by performing the processing in step S23, the CPU 21 , The recording start position of L2 is confirmed, and the maximum track difference Tr when the recording to the outermost periphery of the optical disc 31 is assumed is calculated (step S24).

[0062] Then, it is determined whether or not the maximum track difference Tr can be moved within the margin time "t" (Step S25). If the movement is impossible (No in Step S25) In this case, the second maximum track difference Tr2 within the range that can be moved within the margin time “t” is obtained again, and the input difference is set so that the moving track difference is less than or equal to the second maximum track difference Tr2. The data rate Vil and / or Vi2 is changed (step S26).

[0063] If the determination result in step S25 is affirmative (Yes) and the movement is possible, or if the movement in step S26 is performed, the process proceeds to step S27, and simultaneous recording is started. In other words, the CPU 36 of the optical disk drive 30 is instructed to record simultaneously, and the CPU 36 is instructed to set the buffer amounts Ml and M2, and from the signal control unit 24 for the data to be recorded for each layer L1 and L2 from the ATAPI Start transfer to interface 35. Thereafter, data transfer is always performed at a constant rate.

[0064] In the above-described embodiment and other embodiments, the optical disc has two recording layers. However, if the recording speed of the optical disc is increased to 8x or 16x, the information of the optical disc with 4 layers is recorded. For each recording layer, it is possible to simultaneously record and play back four program information in real time.

The information recording method of the above-described embodiment is the same as the information recording method on the optical disc 31 having the first recording layer L 1 and the second recording layer L 2. Each time the first information from 102 or the PC 104 in FIG. 2 (the same applies below) is accumulated in the notch memory 38, the first predetermined amount of the first information is read from the buffer memory 38 and Processing from the first layer L1 (step S16 in FIG. 14: the same applies below) and the second information source (tuner built into the information recording / reproducing apparatus 10 in FIG. 1 or PC105 in FIG. 2; the same applies below). Whenever a second predetermined amount of information is stored in the buffer memory 38, the second predetermined amount of the second information is read from the buffer memory 38 and written to the second layer L1 (step S16 in FIG. 14: The same shall apply hereinafter) (step S12: the same applies hereinafter).

[0066] With this configuration, the first information continuously output from the first information source and the second information continuously output from the second information source are simultaneously and directly parallel to the optical disc in real time. Thus, it is possible to record on the same optical disc 31.

[0067] The information recording apparatus of the embodiment described above is the information recording apparatus for the optical disc 31 having the first recording layer L1 and the second recording layer L2, and the first information from the first information source. Each time a first predetermined amount is stored in the buffer memory 38, the first predetermined amount of the first information is read from the buffer memory 38 and written to the first layer L1, and the second information from the second information source. Control means for performing a process of reading the second predetermined amount of the second information from the buffer memory 38 and writing it in the second layer every time a second predetermined amount of information is stored in the buffer memory 38 Features.

[0068] With this configuration, the first information continuously output from the first information source and the second information continuously output from the second information source can be simultaneously and directly recorded on the same optical disc in real time. It becomes possible to record in parallel.

The information reproducing method according to the embodiment described above is the information reproducing method for reading and reproducing information from the optical disc 31 having the first recording layer L1 and the second recording layer L2. A process of reading the first predetermined amount of the first information from the buffer memory 38 each time the first information read from the first layer LI is accumulated in the notch memory 38, and reading from the second layer L2. Each time a second predetermined amount of second information is accumulated in the notch memory 38, a process of reading the second predetermined amount of the second information from the buffer memory 38 is performed.

[0069] With this configuration, the first information recorded on the first layer L1 and the second information recorded on the second layer L2 can be simultaneously read from the same optical disc 31 and reproduced. It becomes possible.

[0070] The information reproducing apparatus according to the embodiment described above is the information reproducing apparatus that reads and reproduces information from the optical disc 31 having the first recording layer L1 and the second recording layer L2. Each time the first predetermined amount of information read from the buffer memory 38 is accumulated in the first predetermined amount, the process of reading the first predetermined amount of the first information from the buffer memory 38 and the second information read from the second layer L2 Is provided with a control means 34 for performing a process of reading the second predetermined amount of the second information from the buffer memory 38 each time a second predetermined amount is stored in the buffer memory 38.

[0071] With this configuration, the first information recorded on the first layer L1 and the second information recorded on the second layer L2 can be simultaneously read from the same optical disc 31 and reproduced. Is possible.

The information recording program of the above-described embodiment is the control means 21 of the information recording device 10.

(Or 34) is an information recording program executed by the first information recording program for recording information on the optical disc 31 having the first recording layer L1 and the second recording layer L2. First information power of information source power Each time a first predetermined amount is accumulated in the S buffer memory 38, the first predetermined amount of the first information is read from the buffer memory 38 and written to the first layer L1. Step (step S16) and the second information power of the second information source S every time a second predetermined amount is stored in the buffer memory 38, the second predetermined amount of the second information is read from the buffer memory 38. And a second processing step (step S16) for writing to the second layer L2, and a third processing step (step S12) for performing the first processing step and the second processing step. . [0073] With this configuration, the first information continuously output from the first information source and the second information continuously output from the second information source are directly and in real time on the same optical disc 31. It becomes possible to record in parallel.

[0074] The information reproduction program described above is an information reproduction program executed by the control means 21 (or 34) of the information reproduction apparatus 10, and includes the first recording layer L1 and the second recording layer L2. In an information reproduction program for reading and reproducing information recorded on the optical disk 31 having the first information read from the first layer L1, the buffer memory 38 stores the first predetermined amount each time the first information is stored in the buffer memory 38. The first processing step of reading the first predetermined amount of the first information and the second information force S buffer memory read from the second layer L2 each time a second amount is accumulated in the second buffer L from the buffer memory 38 2. A second processing step for reading a predetermined amount of the second information; and a third processing step for performing the first processing step and the second processing step.

[0075] With this configuration, the first information recorded in the first layer L1 and the second information recorded in the second layer L2 can be simultaneously read out from the same optical disc 31 and reproduced. Is possible.

This application is based on a Japanese patent application filed on October 27, 2004 (Japanese Patent Application No. 2004-312672), the contents of which are incorporated herein by reference.

Brief Description of Drawings

FIG. 1 is a system configuration diagram illustrating one usage pattern of an information recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram illustrating another usage pattern of the information recording / reproducing apparatus according to the embodiment of the present invention.

3 is a block configuration diagram of the information recording / reproducing apparatus shown in FIG.

4 is an explanatory diagram of an information recording method or an information reproducing method for an optical disc having two recording layers shown in FIG.

FIG. 5 is an explanatory diagram showing an example of a recording method on an opposite optical disc having two recording layers shown in FIG. 3.

[FIG. 6] A method for reproducing onto an opposite optical disc having two recording layers as shown in FIG. It is explanatory drawing which shows an example.

FIG. 7 is an explanatory diagram of buffer amounts for storing different program information in the buffer memory shown in FIG.

FIG. 8 is an explanatory diagram of the amount of nofer when the recording speed is 4 times the data rate.

FIG. 9 is an explanatory diagram of the amount of nota in another method when the recording speed is 4 times the data rate.

[FIG. 10] —A diagram showing an example of a relationship between an address, a track jump distance, the number of tracks, and a time required for track jump of a general two-layer DVD disc.

FIG. 11 is an explanatory diagram of the amount of koffa when a plurality of pieces of program information having different data rates are recorded on the optical disc.

FIG. 12 is an explanatory diagram when recording a plurality of program information with different data rates on an optical disc.

FIG. 13 is a flowchart showing a processing procedure executed by the CPU of the system control unit shown in FIG.

FIG. 14 is a flowchart showing a processing procedure executed by the CPU of the drive device shown in FIG. 3.

FIG. 15 is a flowchart showing a processing procedure according to another embodiment executed by the CPU of the system control unit shown in FIG. 3. Explanation of symbols

10 Information recording and playback device

20 System controller

21 CPU on the system control side

22 MPEG encoder

25 MPEG decoder

30 DVD—RZRW drive unit

31 Optical disc

33 Optical pickup

34 CPU on drive side

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Claims

The scope of the claims

[1] In an information recording method on an optical disc having a first recording layer and a second recording layer, each time a first predetermined amount of first information from a first information source is accumulated in a buffer memory, A process of reading a first predetermined amount of the first information from the buffer memory and writing it to the first layer, and each time a second predetermined amount of second information from the second information source is stored in the buffer memory An information recording method comprising: reading a predetermined amount of the second information from the buffer memory and writing the second information to the second layer.

[2] The magnitudes of the first predetermined amount and the second predetermined amount stored in the memory buffer are the data rates of the first information and the second information, the recording speed of the optical disc, and the optical disc. The information recording method according to claim 1, wherein the information recording method is set according to a seek time of the pickup.

[3] The first information and the recording layer of the first layer and the second layer are spirally formed from the center of the disk toward the periphery, and the first information and the periphery of the optical disk from the center to the periphery. 3. The information recording method according to claim 1, wherein the second information is sequentially written.

[4] The first information from the center to the periphery of the optical disc in which the recording layers of the first layer and the second layer are spirally formed from the center to the periphery of the disc. 3. The information recording method according to claim 1, wherein the second information is sequentially written by sequentially writing and the peripheral force toward the central portion.

[5] In an information recording apparatus for an optical disc having a first recording layer and a second recording layer, the first information from the first information source is stored in the buffer memory each time a first predetermined amount is accumulated. The first predetermined amount of the first information is read from the buffer memory and written to the first layer, and the second information from the second information source is stored in the buffer memory every second predetermined amount. An information recording apparatus comprising: control means for performing a process of reading the second information of a fixed amount from the buffer memory and writing the second information to the second layer.

[6] The magnitudes of the first predetermined amount and the second predetermined amount stored in the memory buffer are the data rates of the first information and the second information, the recording speed of the optical disc, and the optical disc. 6. The pickup according to claim 5, wherein the pickup is set according to a seek time. Information recording device.

[7] The first information and the second recording layer are formed in a spiral shape from the center of the disk toward the periphery, and from the center to the periphery of the optical disk. 7. The information recording apparatus according to claim 5, wherein the second information is sequentially written.

[8] The first information from the center to the periphery of the optical disc in which the recording layers of the first layer and the second layer are spirally formed from the center to the periphery of the disc. 7. The information recording apparatus according to claim 5, wherein the second information is sequentially written by sequentially writing and the peripheral force toward the central portion.

[9] In an information reproducing method for reading and reproducing information from an optical disc having a first recording layer and a second recording layer, the first information read from the first layer is stored in a buffer memory in a first predetermined amount. Every time it is stored, the first predetermined amount of the first information is read from the buffer memory, and every time a second predetermined amount is stored in the second information force S buffer memory read from the second layer. And a process of reading the second predetermined amount of the second information from the buffer memory.

[10] The magnitudes of the first predetermined amount and the second predetermined amount are the data rates of the first information and the second information, the reading speed of the optical disc, and the time for seeking the pickup of the optical disc. 10. The information reproducing method according to claim 9, wherein the information reproducing method is set by:

[11] The first information and the recording layer of the first layer and the second layer are formed in a spiral shape from the center of the disk toward the periphery, and from the center to the periphery of the optical disk. 11. The information reproducing method according to claim 9, wherein the second information is read sequentially.

[12] The first information from the center to the periphery of the optical disc in which the recording layers of the first layer and the second layer are spirally formed from the center to the periphery of the disc. 11. The information reproducing method according to claim 9, wherein the second information is sequentially read out and the second information is sequentially read from the peripheral part toward the central part.

[13] In an information reproducing apparatus for reading and reproducing information from an optical disc having a first recording layer and a second recording layer, the first information read from the first layer is first stored in the buffer memory. Each time a predetermined amount is accumulated, a process for reading the first predetermined amount of the first information from the buffer memory and a second predetermined amount of second information read from the second layer are accumulated in the buffer memory. An information reproducing apparatus comprising: control means for performing a process of reading the second predetermined amount of the second information from the buffer memory.

[14] The magnitudes of the first predetermined amount and the second predetermined amount are the data rates of the first information and the second information, the reading speed of the optical disc, and the time for seeking the pickup of the optical disc. 14. The information reproducing apparatus according to claim 13, wherein the information reproducing apparatus is set as follows.

[15] The first information and the recording layer of the first layer and the second layer are formed in a spiral shape from the center of the disk toward the periphery, from the center to the periphery of the optical disk. 15. The information reproducing apparatus according to claim 13, wherein the second information is read sequentially.

[16] The first information from the center to the periphery of the optical disc in which the recording layers of the first layer and the second layer are spirally formed from the center to the periphery of the disc. 15. The information reproducing apparatus according to claim 13, wherein the second information is sequentially read and the second information is sequentially read from the peripheral part toward the central part.

[17] An information recording program executed by the control means of the information recording apparatus, wherein the information recording program records information on an optical disc having a first recording layer and a second recording layer. A first processing step of reading out the first predetermined amount of the first information from the buffer memory and writing it in the first layer each time the first information from one information source is accumulated in the buffer memory in a first predetermined amount; The second information power of the second information source S The second predetermined amount of the second information is read from the buffer memory and written to the second layer each time a second predetermined amount is accumulated in the S buffer memory. An information recording program comprising: a processing step; and a third processing step for performing the first processing step and the second processing step.

[18] An information reproducing program executed by the control means of the information reproducing apparatus, which is recorded on an optical disc having a first recording layer and a second recording layer! A first processing step of reading out the first predetermined amount of the first information from the buffer memory every time the first predetermined amount is accumulated in the first information force S buffer memory from which the first layer force is also read in the program for Second layer force Read second information force S buffer memory A third process that performs a second processing step of reading the second predetermined amount of the second information from the buffer memory each time a second predetermined amount is accumulated, and the first processing step and the second processing step. And a program for reproducing information.