JP4576388B2 - Information recording method and apparatus, information reproducing method and apparatus, information recording program, and information reproducing program - Google Patents

Description

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

  The technological progress of large-capacity optical discs such as DVD (Digital Versatile Disk) -R, DVD-RW, DVD-RAM, DVD + R,... Is remarkable, and in recent years, the recording layer of optical discs has a two-layer structure, a four-layer structure, etc. In addition to the multilayer structure, the focus position of the optical pickup for writing / reading information to / from the recording layer is variably controlled to increase the information recording capacity to 2 times, 4 times,. For this reason, it is possible to record a plurality of programs on one optical disk.

  As described in, for example, Patent Document 1 below, a large-capacity optical disc has a recording layer of each layer formed in a spiral shape from the center to the periphery of the disc. After information has been recorded on the recording layer, information is then recorded on the upper (or lower) recording layer. 7 and 8 of Patent Document 1, the spiral recording layer of each layer is divided into a plurality of zones from the center to the periphery of the disk. First, the lower layer of the first zone in the center and After recording on the upper recording layer, recording is then performed on the lower and upper recording layers of the second zone, and so on.

Japanese Patent Laid-Open No. 2002-150607

  However, since the recording speed to the optical disk is slower than that of the hard disk, the DVD recording / reproducing apparatus that has begun to spread in recent years is equipped with a hard disk in addition to the optical disk, and records information to be recorded once on the hard disk, and then the recording information on the hard disk Is copied to the optical disc.

  In such a DVD recording / reproducing apparatus, since the recording speed to the hard disk is high, for example, different program information can be extracted from a plurality of tuners, and information on the plurality of programs can be recorded on the hard disk in real time in parallel. On the other hand, since the recording speed to the optical disk is lower than that of the hard disk, it is difficult to record a plurality of information such as a plurality of programs directly on the optical disk simultaneously and in real time without using the hard disk.

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

  As an example of the problem to be solved by the present invention, there 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 information such as a plurality of programs recorded on the optical disc can be cited as an example.

An information recording method according to claim 1 is an optical disc having a first recording layer and a second recording layer, and simultaneously taking in the first information from the first information source and the second information from the second information source. In the information recording method for performing writing, the first information is written to the first layer, the second information is written to the second layer simultaneously, and the concurrent writing process and the concurrent writing process are performed. A determination process for determining whether or not a failure occurs in the simultaneous writing process and a determination that the determination of the determination process causes a failure in the simultaneous writing process. and rate, as well as lower or both either the data rate of the second information, it performs a process of controlling to perform the concurrent writing process, the first Broadcast is recorded in consecutive areas of the first layer, the second information, characterized in that it is recorded in consecutive areas of the second layer.

An information recording apparatus according to claim 7 is an optical disc including first information from a first information source and second information from a second information source at the same time and having a first recording layer and a second recording layer. In the information recording apparatus that performs writing, the recording means that performs the simultaneous writing process that simultaneously writes the first information to the first layer and the second information to the second layer, and the recording means When performing the concurrent write processing according to the above, the determination means for determining whether or not the concurrent write processing fails, and when the concurrent write processing fails in the determination by the determination means Decreases the data rate of the first information and / or the second information, and simultaneously writes the data to the recording means. A control means for controlling to perform, the first information is recorded in consecutive areas of the first layer, the second information, characterized in that it is recorded in consecutive areas of the second layer .

The information recording program according to claim 13 is an information recording program executed by the control means of the information recording apparatus, and simultaneously takes in the first information from the first information source and the second information from the second information source, In an information recording program for recording information on an optical disc having a first recording layer and a second recording layer, the first information is stored in the first layer, the second information is stored in the second layer, A first processing step for performing simultaneous parallel writing processing, and a second processing step for determining whether or not a failure occurs in the simultaneous writing processing when performing the first processing step; If a failure occurs in the simultaneous writing process in the determination by the second processing step, either or both of the data rate of the first information and the data rate of the second information With lower one of the data rate, and a third processing step of controlling to perform the concurrent writing process, the first information is recorded in consecutive areas of the first layer, the second Information is recorded in a continuous area of the second layer .

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an embodiment of the 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 television 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.

  This information recording / reproducing apparatus 10 is equipped with an optical disc provided with two recording layers, acquires the information of the program # 1 from the tuner 102, and directly records it on the first recording layer in real time. It is possible to directly record the information of the program # 2 obtained from the tuner in the recording layer in real time in real time. Of course, if two tuners are mounted in the information recording / reproducing apparatus 10, the illustrated tuner 102 is not necessary.

  Further, the information recording / reproducing apparatus 10 reproduces the recorded 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 the recording method described later. The recorded information of the program # 2 can be reproduced and displayed on the display device 103 at the same time.

  FIG. 2 is a diagram showing a configuration of a use system of another form of the information recording / reproducing apparatus according to the above-described embodiment. 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 to be recorded on the optical disc is not limited to video and audio information and can be digitized. Any information is acceptable.

  In the system configuration shown in FIG. 2, a plurality of PCs (PCs) 104 and 105 in the illustrated example are connected via a LAN or the like, and the information recording / reproducing apparatus 30 is connected to one PC 105. 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. An optical disk inserted into 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 PC 104 on the first recording layer in real time, and simultaneously record the information acquired from its own PC 105 on the second recording layer in real time. it can. The reproduction is the same as in FIG.

  Next, the configuration of the information recording / reproducing apparatuses 10 and 30 and the recording / reproducing method will be described. Although the information to be recorded / reproduced is not limited as described above, a plurality of information to be recorded / reproduced will be described as information on program # 1 and information on program # 2.

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

  In the present embodiment, the system control unit 20 is configured by hardware. The system control unit 20 controls the system control unit 20 in an integrated manner, and captures the video signal and audio signal of the program # 1 from an information source such as a tuner, and at the same time, separate information. An MPEG encoder 22 that takes in the video signal and audio signal of program # 2 from the source and converts each program information into MPEG data, an encryption unit 23 that encrypts MPEG data encoded by the MPEG encoder 22, and an encryption unit 23 The signal control unit 24 that transfers the MPEG data encrypted by the optical disk drive device 30 and the two information (program # 1 ′, program # 2 ′) transferred from the optical disk drive device 30 during reproduction are signal control unit 24. MPEG decoder 2 which takes in and decodes after being decrypted by the encryption unit 23 Provided with a door.

  In this embodiment, the optical disk drive device 30 writes information on the optical disk 31 or reads the recorded information on the optical disk 31. The spindle motor 32 rotates and drives an optical disk 31 such as a DVD-R / RW having two recording layers. An optical pickup (PU) 33, a CPU 34 for overall control of the optical disk drive device 30, an ATAPI interface 35 connected by a signal control unit 24 of the system control unit 20 and an ATAPI cable 40, a command controlled by the CPU 34, and a spindle motor 32 and A servo control unit 36 that drives and controls the pickup 33, and information of programs # 1 and # 2 acquired through the ATAPI interface 35 during recording are signal-processed and output to the pickup 33, and a signal output from the pickup 33 during playback is displayed. reading Ri signal processing to a signal processing unit 37 to be output 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, the stored information is stored. When the information read out from the buffer memory 38 is output to the pickup 33 and the read information from the optical disk 31 is stored in the buffer memory 38 by a predetermined capacity, the stored information is read out from the buffer memory 38 and processed by the signal processing unit 37. Are output to the ATAPI interface 35.

  FIG. 4 is an explanatory diagram of a recording method and a reproducing method for an optical disc 31 having two recording layers (the first layer (lower layer) is “L1” and the second layer (upper layer) is “L2”). is there. The optical disk 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 consists of a lower layer L1 and an upper layer L2. Information on program # 1 is recorded on the lower layer L1, and information on program # 2 is recorded on the upper layer L2.

  Since the information of program # 1 and the information of program # 2 need to be recorded simultaneously in real time, in the illustrated example, when recording target information A of program # 1 is stored in the buffer memory 38 by a predetermined capacity First, writing of information A of program # 1 in the buffer 38 to the lower layer L1 is started. During this writing, the recording target information of program # 2 is accumulated in the buffer memory 38.

  After information A of program # 1 is recorded in the lower layer L1, information B of program # 2 is then recorded in the upper layer L2. Therefore, 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 the pickup 33 to the recording start position of the information B (track jump). Therefore, after recording the information A of the program # 1 in the lower layer L1, the focus jump and the track jump are performed, and then recording of the information B having a predetermined capacity of the program # 2 is started in the upper layer L2.

After the recording of the information B is completed, next, a predetermined amount of information C following the information A of the program # 1 is read from the buffer memory 38, the focus jump is performed, the focus position of the pickup 33 is adjusted to the lower layer L1, and the track jump is performed. The writing position is aligned with the writing end position of the information A, and the information C is written in the lower layer L1. Thereafter, similarly, 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. Are written in the upper layer L2.
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 → ..., but the writing process is not necessarily performed on the lower layer L1 and the upper layer L2. For example, the writing process may be performed as information A → information C → information B → information E →.

  As a result, two program information can be directly and simultaneously recorded on the optical disc in real time without having to once record programs # 1 and # 2 on a high-speed hard disk as in the prior art. Even when the information of the programs # 1 and # 2 recorded on the optical disk is read and reproduced, as shown in FIG. 4, the information A, information B, information C,. Information of programs # 1 and # 2 can be reproduced.

  The optical disc 31 is a parallel type 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 in which a signal is read from the outer peripheral side to the inner peripheral side in reproducing information of the upper layer L2).

Even in this opposite optical disc, the information recording / reproducing apparatuses 10 and 30 according to the embodiment of the present invention can perform recording / reproducing by the recording method and reproducing method described below.
FIG. 5 is an explanatory diagram showing an example of a method for recording on an opposite optical disc 41 by the information recording / reproducing apparatuses 10 and 30, and FIG. 6 is an explanatory diagram showing an example of a reproducing method.

  As shown in FIG. 5, the direction of the program # 2 on the opposite optical disc 41 is recorded so as to be opposite to the direction of the program # 2 on the parallel optical disc 31. The parallel type optical disc 31 is normally reproduced continuously from the outer peripheral portion toward the inner peripheral portion. 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 D is read by jumping to the head position of the information D recorded in the second manner as shown in (1). The track jumps to the head position of the third recorded information F as in (2) and the information F is read out, and then the track is recorded at the head position of the fourth recorded information H as in (3). Jump to read information H. Thereafter, information is read out to the outer periphery side in the same manner, and program # 2 is reproduced.
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.

  FIG. 7 is an explanatory diagram of the buffer amount of the buffer memory for accumulating information on programs # 1 and # 2. When the recording speed Vo of the optical disk drive 30 and the data rate Vi to the recording layers L1 and L2 are in a relationship of Vo = 2 × Vi, the lower layer L1 in the buffer memory 38 as shown in FIG. When the write information to the layer L becomes zero and the writing to the lower layer L1 is completed, the amount of information to be written to the upper layer L2 in the buffer memory 38 reaches a predetermined capacity. Need to start writing.

  However, it takes time to perform the track jump and the focus jump, and in the state shown in FIG. 7, there is not enough time, so the concurrent writing (or reading) processing of the programs # 1 and # 2 is not possible. It will go bankrupt.

  FIG. 8 is an explanatory diagram of the buffer amount when the recording speed Vo is Vo = 4 × Vi. In this case, since the buffer storage amount of information to be written in the recording layer L2 (or L1) has not yet reached the predetermined amount at the end of recording on the recording layer L1 (or L2), the time for performing the track jump and focus jump There is a reasonable margin. Therefore, it is possible to simultaneously record and reproduce programs # 1 and # 2 on the optical disc 31.

  The ranges indicated by arrows a ′, a, and c in FIG. 8 are sufficient in terms of time, and in the illustrated example, a ′ = a / 2 and a = c = 1t. In order to make the initial time margin a 'longer, for example, to set a' = a, a = 5t / 7, b = 11t / 7, and c = 9t / 7. At this time, the relationship between the initial buffer capacity M1 of program # 1 and the initial buffer capacity M2 of program # 2 is M1 = 7 (M2) / 11.

  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 M1 of the program # 1 and the initial buffer capacity M2 of the program # 2 is M2 = 2 × M1. In this way, it is easier to allocate the buffer amount than in the case of FIG.

  If the memory capacity (total buffer amount) of the buffer memory 38 is set to 2 Mbytes and 1 Mbyte is assigned as the buffer size for the programs # 1 and # 2, respectively, in the case of FIG. 9, the initial buffer amount M1 = 0.5 MByte, When M2 = 1 MByte and both the lower layer L1 and the upper layer L2 are recorded from the innermost circumference (24 mm), the track jump distance is 16 ECC (512K / 32K), that is, 7.127 μm (about 10 tracks) at the innermost circumference. The outer circumference is 2.869 μm (about 4 tracks). FIG. 10 shows an example of the relationship between the address, track jump distance, number of tracks, and time required for track jump of a general 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, real-time simultaneous recording of two programs is possible if a recording jump and focus jump are made to a recording start position to another recording layer within a time margin of 2t = 200 ms to prepare for recording. , Playback is possible.

  8 and 9, the data rates to the first layer (L1 layer) and the second layer (L2 layer) are the same, but the data rates to each layer may be different. FIG. 11 is an explanatory diagram of each buffer amount when the data rates are different. In the illustrated example, the data rate to the first layer (L1 layer) is Vi1, the data rate to the second layer (L2 layer) is Vi2, and Vo = 2 × Vi1 and Vo = 4 × Vi2. Shows the case.

Now generally,
Vo = a × Vi1
Vo = b × Vi2
However, excluding a ≧ 2, b ≧ 2, b ≧ a, a + b <4, and a = b = 2,
T0 = T1 × b / a
(B-1-b / a) T1 = 2t
T ′ = [(b−1) T1-t] / a.

When the relationship with the buffer amount is obtained,
Total buffer amount M = Vi1 × (a−1) T0 + Vi2 × (b−1) T1
M = Vo × T0 × ((a−1) bb + (b−1) aa) / abb, and the buffer amount M1 for program # 1 and the buffer amount for program # 2 may be determined so as to satisfy this.

  In the case of the example shown in FIG. 11, if the total buffer amount is 2 Mbytes, the predetermined buffer amount M1 = 1.14 Mbytes for program # 1, the initial buffer amount M1 ′ = 0.72 MByte for program # 1, and program # 2 The predetermined buffer amount M2 is 0.921 MByte. When recording is performed from the innermost circumference (24 mm) for both the first layer L1 and the second layer L2, the recording positions of both are separated as going to the outer circumference. This is illustrated in FIG.

  When recording is performed up to the outermost periphery in this state, a difference of 8435 tracks is generated in terms of the number of tracks. When Vi1 = 20 Mbps, Vi2 = 10 Mbps, and Vo = 40 Mbps, t = 114 ms. In a quadruple speed DVD drive device, it is difficult to move 8435 tracks in 114 ms, and if the speed difference between Vi1 and Vi2 is large, the simultaneous parallel recording and playback are severely controlled. Of course, there is no problem when the recording time is short and it is not necessary to record to the outermost periphery.

  The above example shows the critical data rate difference when using a 4x speed drive device. If the data rate difference is small, there will be no problem, and simultaneous real-time recording and playback is possible. It is.

  For example, when Vi1 = 10 Mbps, Vi2 = 8 Mbps, Vo = 40 Mbps, and the total buffer amount M = 2 MByte, a = 4, b = 5, t = 316.5 ms, M1 = 1.079 Mbyte, M1 ′ = 0.666 MByte , M2 = 0.721 MByte. When recording to the outermost circumference under this condition, a difference of 4914 tracks occurs in the number of tracks. However, since the seek time is 114 ms or less as an actual measurement value, no failure occurs in real-time simultaneous recording and reproduction.

  Similarly, when Vi1 = 20 Mbps, Vi2 = 13.33 Mbps, Vo = 40 Mbps, and the total buffer amount M = 2 MByte, a = 2, b = 3, t = 70.6 ms, M1 = 1.068 MByte, M1 ′ = 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 disc drive apparatus 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 disc drive 30, the two data rates Vi1 and Vi2, and the total buffer amount M, and the buffer areas M1 and L2 for L1 and L2. M2 and margin time t are calculated (step S1).

  Next, the CPU 21 confirms the recording start positions of the layers L1 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 the maximum track number difference Tr can be moved within the margin time “t” (step S3). If the movement is impossible, the process ends with an error (step S4).

  If it can be moved, the process proceeds to step S5 to start simultaneous recording. That is, the CPU 36 of the optical disc drive 30 is instructed to perform simultaneous recording, and the CPU 36 is instructed to set the buffer amounts M1 and M2, and the ATAPI interface from the signal control unit 24 of the recording target data for each layer L1 and L2. The transfer to 35 is started. Thereafter, data transfer is always performed at a constant rate.

  After step S5, as shown in FIG. 14, the CPU 36 of the optical disk drive 30 that has received the simultaneous recording instruction from the CPU 21 stores the transferred data size or the amount of data stored in the buffer memory 38 (buffer amount). ) Is monitored (step S11). 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 M1. Determination is made (step S13).

  If the determination result in step 13 is negative (No), the process proceeds to step S14 to determine whether or not to flush the cache. If the determination result is negative, the process returns to step S13. In the case of flushing the cache, the process proceeds from step S14 to step S15, the data in the buffer is written to the optical disc 31, the normal recording mode (recording mode other than the simultaneous parallel recording mode) is entered, and this process is terminated. .

  If the determination result in step S13 is affirmative (Yes), the process proceeds to step S16, and the stored data in the buffer is read and written to the optical disc 31. Then, the process waits for the end of writing (step S17), and when the writing ends, the process returns from step S17 to step S12.

  In step S12 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 accumulation amount of the data of program # 2 has reached M2, and if so, the information of program # 2 is written into the second layer L1. In the same manner, real-time and simultaneous recording of programs # 1 and # 2 is performed.

  When 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. As in the recording order, information A → information B → information C →... Are sequentially read out via 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,. Information of program # 2 is reproduced and output from the 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 disc drive device 30 is the same as the flow of FIG. 14 in the above-described embodiment, and illustration and description thereof are omitted.

In FIG. 15, the CPU 21 first confirms or acquires information on the recording speed Vo of the optical disc drive 30, the two data rates Vi1 and Vi2, and the total buffer amount M, and performs buffer areas M1 and L2 for L1 and L2. M2 and margin time “t” 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 necessary minimum time can be secured. For example, referring to the table in FIG. 10, when the number of tracks is 0, 44 ms is required as the movement time to the layer immediately above or directly below, so that an example of the criterion in step S22 is a margin time “t It is only necessary to determine whether or not “is 44 ms or more (or 50 ms or more with a margin).

When the margin time “t” is not sufficient (when the determination result in step S22 is negative (No)), either or both of the input data rates Vi1 and Vi2 are set so that the margin time “t” becomes a sufficient value. One is lowered (step S23).
When the determination result in step S22 is affirmative (Yes) and the margin time “t” is sufficient, or when the processing in step S23 is performed and the margin time “t” is set to a sufficient value, the CPU 21 determines that each layer L1 , L2 recording start position 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).

  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 (when the determination result in step S25 is negative (No)). Then, the second maximum track difference Tr2 within a range that can be moved within the margin time “t” is obtained again, and the input data rate Vi1, Vi1 is set so that the moving track difference becomes equal to or less than the second maximum track difference Tr2. The value of both or one of Vi2 is changed (step S26).

  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. That is, the CPU 36 of the optical disc drive 30 is instructed to perform simultaneous recording, and the CPU 36 is instructed to set the buffer amounts M1 and M2, and the ATAPI interface from the signal control unit 24 of the recording target data for each layer L1 and L2. The transfer to 35 is started. Thereafter, data transfer is always performed at a constant rate.

  In the above-described embodiment and other embodiments, the case where the optical disk has two recording layers and two pieces of program information are simultaneously recorded and reproduced in real time in each layer has been described. If the recording speed is increased to 8 × or 16 ×, it is possible to simultaneously record and reproduce four program information in real time for each recording layer of an optical disc having four recording layers.

  The information recording method according to the above-described embodiment is the same as the information recording method on the optical disc 31 having the first recording layer L1 and the second recording layer L2, and the first information source (the tuner 102 in FIG. Each time the first information from the second PC 104: the same is stored in the buffer memory 38, the first predetermined amount of the first information is read from the buffer memory 38 and stored in the first layer L1. The writing process (step S16 in FIG. 14: the same applies below) and the second information from the second information source (the tuner built in the information recording / reproducing apparatus 10 in FIG. 1 or the PC 105 in FIG. 2; the same applies below) are stored in the buffer memory 38. Every time the second predetermined amount is accumulated, the second predetermined amount of the second information is read from the buffer memory 38 and written into the second layer L1 (step S16 in FIG. 14; the same applies hereinafter) (step S16). -Up S12: hereinafter the same) it is characterized.

  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 directly and in real time on the optical disk simultaneously and in parallel. 31 can be recorded.

  In the information recording apparatus of the above-described embodiment, in the information recording apparatus for the optical disc 31 having the first recording layer L1 and the second recording layer L2, the first information from the first information source is stored in the buffer memory. Each time the first predetermined amount is stored in the 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 is stored in the buffer memory. Each time the second predetermined amount is stored in the storage unit 38, the second predetermined amount of the second information is read from the buffer memory 38 and written to the second layer.

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 recorded on the same optical disc directly and in real time in parallel. It becomes possible to do.
The information reproducing method according to the above-described embodiment 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, and reading the information from the first layer L1. Each time a first predetermined amount of first information is accumulated in the buffer memory 38, a process of reading the first predetermined amount of the first information from the buffer memory 38, and a second information read from the second layer L2 is a buffer. Each time a second predetermined amount is stored in the memory 38, a process of reading the second predetermined amount of the second information from the buffer memory 38 is performed.

  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 disk 31 and reproduced. .

  The information reproducing apparatus according to the embodiment described above is read from the first layer L1 in 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 a first predetermined amount of first information is accumulated in the buffer memory 38, a process for reading the first predetermined amount of the first information from the buffer memory 38 and a second information read from the second layer L2 is a buffer memory. Each time a second predetermined amount is stored in 38, a control means 34 is provided for performing a process of reading the second predetermined amount of the second information from the buffer memory 38.

  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 out from the same optical disk 31 and reproduced. Become.

  The information recording program of the above-described embodiment is an information recording program executed by the control means 21 (or 34) of the information recording apparatus 10, and includes the first recording layer L1 and the second recording layer L2. Each time the first information from the first information source is accumulated in the buffer memory 38, the first predetermined amount of the first information is stored in the buffer memory 38. A first processing step (step S16) of reading from the buffer memory 38 and writing to the first layer L1, and the second location each time a second predetermined amount of second information from the second information source is accumulated in the buffer memory 38. A second processing step (step S16) for reading out the second information of the fixed amount from the buffer memory 38 and writing it in the second layer L2, the first processing step and the second processing step; Characterized in that it comprises a third processing step of performing (step S12).

  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 directly and in parallel on the same optical disk 31 in real time. Can be recorded.

  The information reproducing program described above is an information reproducing program executed by the control means 21 (or 34) of the information reproducing apparatus 10, and has an optical disc 31 having a first recording layer L1 and a second recording layer L2. In the information reproduction program for reading and reproducing the information recorded in the first memory, the first information read from the first layer L1 is stored in the buffer memory 38 every time a first predetermined amount is accumulated in the buffer memory 38. A first processing step for reading a predetermined amount of the first information, and a second predetermined amount of the second information read from the second layer L2 from the buffer memory 38 each time a second predetermined amount is accumulated in the buffer memory. A second processing step for reading second information and a third processing step for performing the first processing step and the second processing step are provided.

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 out from the same optical disk 31 and reproduced. Become.
This application is based on Japanese Patent Application (Japanese Patent Application No. 2004-31672) filed on Oct. 27, 2004, the contents of which are incorporated herein by reference.

It is a system configuration figure explaining one use form of an information recording and reproducing device concerning one embodiment of the present invention. It is a system block diagram explaining another usage pattern of the information recording / reproducing apparatus which concerns on one embodiment of this invention. It is a block block diagram of the information recording / reproducing apparatus shown in FIG. It is explanatory drawing of the information recording method or the information reproduction | regeneration method to the optical disk with the two recording layers shown in FIG. FIG. 4 is an explanatory diagram showing an example of a recording method on an opposite type optical disc having two recording layers shown in FIG. 3. FIG. 4 is an explanatory diagram showing an example of a reproduction method for an opposite optical disc having two recording layers shown in FIG. 3. It is buffer amount explanatory drawing which accumulate | stores different program information in the buffer memory shown in FIG. It is buffer amount explanatory drawing in case a recording speed is 4 times as high as a data rate. It is buffer amount explanatory drawing in another method in case a recording speed is 4 times as high as a data rate. It is a figure which shows an example of the relationship with the time of the address of a general 2 layer structure DVD disc, track jump distance, the number of tracks, and track jump. It is buffer amount explanatory drawing when the several program information from which a data rate differs is recorded on an optical disk. It is explanatory drawing when recording the some program information from which a data rate differs on an optical disk. It is a flowchart which shows the process sequence which CPU of the system control part shown in FIG. 3 performs. It is a flowchart which shows the process sequence which CPU of the drive apparatus shown in FIG. 3 performs. It is a flowchart which shows the process sequence by the other Example which CPU of the system control part shown in FIG. 3 performs.

DESCRIPTION OF SYMBOLS 10 Information recording / reproducing apparatus 20 System control part 21 System control part side CPU
22 MPEG encoder 25 MPEG decoder 30 DVD-R / RW drive device 31 Optical disc 33 Optical pickup 34 CPU on drive side
38 Buffer memory

Claims (13)

In the information recording method for simultaneously reading the first information from the first information source and the second information from the second information source and writing to the optical disc having the first recording layer and the second recording layer,
Simultaneous writing process for simultaneously writing the first information to the first layer and the second information to the second layer;
A determination process for determining whether a failure occurs in the concurrent write process when performing the concurrent write process; and
When a failure occurs in the simultaneous writing process in the determination by the determination process, the data rate of the first information and / or the data rate of the second information is decreased, and Performing control to perform the concurrent write processing ,
The information recording method , wherein the first information is recorded in a continuous area of the first layer, and the second information is recorded in a continuous area of the second layer .   The first information and the second information are formed from the central portion of the optical disc toward the peripheral portion of the optical disc in which the recording layers of the first layer and the second layer are spirally formed from the central portion of the disc toward the peripheral portion. The information recording method according to claim 1, wherein the information is sequentially written.   The first information and the second recording layer are spirally formed from the center of the disk toward the periphery, and the first information is sequentially written from the center to the periphery of the optical disk, The information recording method according to claim 1, wherein the second information is sequentially written from a peripheral part toward the central part.   The determination processing is performed when the simultaneous writing processing is performed based on a recording speed on the optical disc, a data rate of the first information, a data rate of the second information, and a buffer amount. The information recording method according to claim 1, wherein it is determined whether or not a failure occurs in the automatic writing process.   In the determination process, when the simultaneous writing process is performed in consideration of the recording start position of the first layer and the recording start position of the second layer, whether or not the simultaneous writing process fails The information recording method according to claim 1, wherein the information recording method is determined.   In the determination process, it is determined whether or not a failure occurs in the simultaneous writing process based on a difference in recording position between the first layer and the second layer when recording to the outermost periphery of the optical disc is assumed. The information recording method according to claim 1. In the information recording apparatus for simultaneously reading the first information from the first information source and the second information from the second information source and writing to the optical disc having the first recording layer and the second recording layer,
A recording means for performing a simultaneous writing process for simultaneously writing the first information to the first layer and the second information to the second layer;
A determination means for determining whether or not a failure occurs in the simultaneous writing process when the recording means performs the simultaneous writing process;
When a failure occurs in the simultaneous writing process in the determination by the determination unit, the data rate of the first information and / or the data rate of the second information is lowered, and Control means for controlling the recording means to perform the simultaneous writing process ;
The information recording apparatus according to claim 1, wherein the first information is recorded in a continuous area of the first layer, and the second information is recorded in a continuous area of the second layer .   The first information and the second information are formed from the central portion of the optical disc toward the peripheral portion of the optical disc in which the recording layers of the first layer and the second layer are spirally formed from the central portion of the disc toward the peripheral portion. The information recording apparatus according to claim 7, wherein the information is sequentially written.   The first information and the second recording layer are spirally formed from the center of the disk toward the periphery, and the first information is sequentially written from the center to the periphery of the optical disk, The information recording apparatus according to claim 7, wherein the second information is sequentially written from a peripheral part toward the central part.   In the case where the determination means performs the simultaneous writing process based on the recording speed of the information recording apparatus with respect to the optical disc, the data rate of the first information, the data rate of the second information, and the buffer amount. The information recording apparatus according to claim 7, further comprising: determining whether or not a failure occurs in the simultaneous and parallel writing process.   The determination means further considers the recording start position of the first layer and the recording start position of the second layer, and whether or not the simultaneous writing process fails when the simultaneous writing process is performed. The information recording apparatus according to claim 7, wherein the information recording apparatus determines whether or not.   The determination means determines whether or not the simultaneous writing process is broken based on a difference in recording position between the first layer and the second layer when recording to the outermost periphery of the optical disc is assumed. The information recording apparatus according to claim 7. An information recording program executed by the control means of the information recording apparatus, which simultaneously captures the first information from the first information source and the second information from the second information source, and records the first layer and the second layer. In an information recording program for recording information on an optical disc having a recording layer,
A first processing step for performing a simultaneous writing process for simultaneously writing the first information to the first layer and the second information to the second layer;
A second processing step for determining whether or not a failure occurs in the simultaneous and parallel processing when performing the first processing step;
If the simultaneous writing process fails in the determination in the second processing step, the data rate of the first information and / or the data rate of the second information is lowered. And a third processing step for controlling to perform the simultaneous writing process ,
An information recording program , wherein the first information is recorded in a continuous area of the first layer, and the second information is recorded in a continuous area of the second layer .

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