JP2007242229A - Information recording system and information recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording system which can shorten the time required for the total recording including recording of sub-information signal in a lead-in area or lead-out area. <P>SOLUTION: The information recording system S which records the main information signal and sub-information signal on an optical disk 1 has a pickup 2 for recording the main information signal in the main information recording area and sub-information signal in the lead-in area and lead-out area respectively, a slider 3 for moving the pickup 2, and a CPU 17 for moving the pickup 2 and recording the sub-information signal in the spare time when the pickup 2 does not record the main information signal. The CPU 17 controls the pickup 2 and slider 3 to record the sub-information signal in the main information recording area inside the inner periphery position of the lead-out area. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present application relates to an information recording apparatus for recording an information signal on a recordable information recording medium represented by a phase change optical disk.

  In general, a read-only optical disc has a main information recording area in which main information signals such as video information and music information as main information to be reproduced are recorded, and an inner and outer peripheral portion of the main information recording area. A lead-in area and a lead-out area, which are sub-information areas, are formed so as to sandwich the main information recording area. For example, in the case of a DVD (Digital Verastile Disc), as shown in FIG. 7, a diameter of 48 mm to 116 mm is a main information recording area, a diameter of 46 mm to 48 mm is a lead-in area, and a diameter of 116 mm to 117 mm is a lead-out area. ing.

  The lead-in area and the lead-out area are usually used so that the main information recording area on the disc can be used to the maximum extent, that is, the main information signal recorded from the innermost track to the outermost track of the main information recording area. It is provided to enable reading.

  In other words, in order to read the main information signal from the innermost track or the outermost track, the pickup that generates the reading light beam so that the reading light beam irradiates the innermost track or the outermost track. Although the transfer control is performed, when the transfer control is performed, it may be transferred to the innermost side of the innermost track or the outermost side of the outermost track in the main information recording area due to the influence of disturbance or the like. . In such a case, an error signal (for example, a tracking error signal) required for transfer control is obtained when a light beam is irradiated onto an area where an information track that is a pit row is not formed, that is, an area in a mirror surface state. In the worst case, there is a possibility that the transfer control is impossible, that is, the pickup goes out of control.

  Therefore, as described above, even if the main information recording area is transferred beyond the innermost track or the outermost track due to disturbance or the like, the main information is set so that the transfer control is not disabled. A pit row, that is, an information track is formed over a predetermined range (for example, 1000 to 500 μm or more in the case of the above-mentioned DVD) on both the inner peripheral side of the recording area and the outer peripheral side of the outermost track. To do.

  In the information track forming the lead-in area and the lead-out area, a singular signal indicating that it is a lead-in area or a lead-out area is recorded as a sub information signal that forms a pit row in both areas. Depending on the type of optical disc, the lead-in area may include table of contents information related to the main information signal recorded in the main information recording area or disc attribute information (such as a read-only disc / recordable disc), etc. And is recorded as a sub information signal.

  By the way, a recordable optical disk (an optical disk on which a user can record an arbitrary main information signal) usually has a guide track (for example, a guide track) for guiding a recording light beam to a recording track (for example, a groove track). , Land track) and pre-information such as position information (address) on the disc are recorded in the form of pre-pits or the like. Then, the recording device searches the recording track at the predetermined position on the disc from the guide track and the pre-pit, thereby irradiating the recording track at the predetermined position with the recording light beam. A desired main information signal can be recorded. The guide track and the prepit are also formed in an area corresponding to a lead-in area and a lead-out area in a read-only disc, and the recording apparatus records the specific signal indicating the lead-in or lead-out in the area. It has become. A lead-in area and a lead-out area such as a read-only disk are formed on a recordable optical disk so that a recordable disk can be played back by a playback device that plays back the read-only disk. This is because it is necessary to maintain consistency in the format.

  In addition, since a reproducing apparatus has a tracking method or the like selected on the assumption that the information track is formed of pit rows, the guide track may guide the reading beam to the recording track depending on the selected tracking method. It may not be possible. For example, if the time difference method for obtaining an error signal based on the phase difference of reflected light components from each pit forming the information track obtained when the reading beam crosses the track is selected as the tracking method, tracking control is performed. From the point of view, unless a pit row is formed on the recording track, the recording track is equal to the above-described mirror part and a tracking error signal cannot be obtained.

  Therefore, in the conventional information recording apparatus for recording the main information signal on the recordable optical disc, after the recording of the main information signal on the recording track is completed, the pickup is performed in the lead-in area and the lead-out area as a final processing step. The pit train carrying the sub-information signal such as the singular signal or the attribute information described above is formed. Therefore, there is a problem in that a separate step of recording the sub information signal is required separately from the step of recording the main information signal to be originally recorded, and accordingly, the recording process takes time.

  The present invention has been made in view of the above problems, and its object is to reduce the time required for the entire recording processing operation including the recording operation for recording the sub information signal in the lead-in area or the lead-out area. It is an object of the present invention to provide an information recording apparatus and an information recording method that can be used.

  In order to solve the above-mentioned problem, the invention described in claim 1 is an information recording apparatus for recording a main information signal and a sub information signal on an information recording medium, wherein the main information signal is stored in the main information recording area. Recording means for recording the sub information signal in a predetermined lead-in area and lead-out area, a transfer means for transferring the recording means, and a free time in which the recording means does not record the main information signal. Control means for transferring the recording means and recording the sub-recording information signal, and the control means sends the sub-information signal to the main information recording area from the inner peripheral position to the inner circumference of the lead-out area. The recording means and the transfer means are controlled so as to record.

  In order to solve the above problems, an invention according to claim 9 is an information recording method for recording a main information signal and a sub information signal on an information recording medium, wherein the main information signal is stored in a main information recording area. A transfer step of transferring recording means for recording the sub-information signal in a predetermined lead-in area and lead-out area, respectively, and the recording means in a free time in which the recording means does not record the main information signal. A control step for transferring and recording the sub-recording information signal, wherein the control step records the sub-information signal in the main information recording area from the inner peripheral position to the inner periphery of the lead-out area. The recording means is controlled to be transported.

  According to the present application, the idle time associated with the recording operation of the main information signal on the recording medium or the reproducing operation from the recording medium is detected, and the sub information signal is recorded in the lead-in area / lead-out area during the idle time. Since it is configured, it is possible to perform the sub information signal recording operation in parallel with the main information signal recording operation or the main information signal reproducing operation, so that it relates to the main information signal recording operation or the reproducing operation. The overall time can be reduced, so that the convenience of the information recording apparatus can be improved.

  Next, a preferred embodiment of the present application will be described with reference to the drawings. In the embodiment described below, an information recording apparatus capable of recording and reproducing information with respect to a disk-shaped recording medium (hereinafter simply referred to as an optical disk) capable of optically recording and reproducing information. It is embodiment when this application is applied with respect to.

  First, the configuration of the information recording apparatus according to the embodiment of the present application will be described with reference to FIG.

  As shown in FIG. 1, the information recording apparatus S according to the embodiment includes a pickup 2 as recording means and / or reading means, a slider 3 as transfer means, an A / D (analog / digital) converter 4, and processing. A compression circuit 5, a recording buffer memory 6, an encoder 8 and a recording circuit 9 constituting the means, a memory 7 storing the above-mentioned sub information signal recorded in the lead-in area and the lead-out area, and a reworking means are constituted. A reproduction circuit 10, a decoder 11, a reproduction buffer memory 12 and an expansion circuit 13, a D / A (digital / analog) converter 14, and an address extractor 15 for extracting address information recorded in advance on the recordable optical disk 1; , Spindle motor 16, CPU 17 as detection means and control means, servo circuit 18, operation unit 1 When, is constituted by a display unit 20.

  Next, an outline operation related to the present invention for each component will be described. First, a case where information to be recorded from the outside is recorded on the optical disc 1 as a recording medium will be described.

  An information rate Sin (analog signal) corresponding to information to be recorded from the outside (specifically, the information to be recorded includes image information and / or audio information) is preset at an input rate Mr. The A / D converter 4 digitizes the information signal Sin, generates a digital information signal Sd, and outputs it to the compression circuit 5.

  Then, the compression circuit 5 compresses the input digital information signal Sd based on the control signal Ss5 output from the CPU 17 to generate a compressed information signal Spd which is the main information signal and supplies it to the recording buffer memory 6. Output. At this time, when the digital information signal Sd is compressed, for example, a compression method such as MPEG2 (Moving Picture coding Experts Group 2) method is used.

  Next, the recording buffer memory 6 temporarily stores the input compressed information signal Spd as it is. At this time, the recording buffer memory 6 always outputs a data amount signal Smr indicating the data amount of the accumulated compressed information signal Spd to the CPU 17.

  Next, the encoder 8 receives the compressed information signal Spd temporarily stored in the recording buffer memory 6 or the sub information signal Scd stored in the memory 7 based on the control signal Ss4 output from the CPU 17. The information signal Sin is read out at an input rate Mr or a recording rate Rr higher than that, and encoded (encoded) to generate an encoded signal Sed and output it to the recording circuit 9.

  Then, the recording circuit 9 converts the input encoded signal Sed into a recording signal Sr based on the control signal Ss2 output from the CPU 17 and outputs it to the pickup 2. At this time, in the recording circuit 9, so-called write strategy processing or the like is performed on the encoded signal Sed in order to form a pit having a shape accurately corresponding to information to be recorded on the optical disk 1 described later.

  Next, the pickup 2 performs transfer control to a predetermined area (main information recording area or lead-in / lead-out area) of the optical disc 1 via the slider motor 3 based on the control signal Ss7 output from the CPU 17. receive. Further, the pickup 2 generates a light beam B by driving a light source such as a semiconductor laser (not shown) in the pickup 2 based on the recording signal Sr output from the recording circuit 9, and generates this light beam B on the optical disc 1. By irradiating the information recording surface of the predetermined area and forming pits corresponding to the recording signal Sr, the information signal Sin or the sub information signal Scd is recorded on the optical disc 1 at a speed corresponding to the recording rate Rr. At this time, the optical disk 1 is rotated at a predetermined rotational speed by a spindle motor 16 driven based on a spindle control signal Ssm described later. On the optical disc 1, for example, pits corresponding to the recording signal Sr are formed by the phase change method, and the information signal Sin is recorded.

  Next, an operation for reproducing information recorded on the optical disc 1 will be described. At the time of reproduction, first, the pickup 2 transferred to a predetermined area of the optical disk 1 by the slider 3 irradiates the rotating optical disk 1 with the reproduction light beam B, and is formed on the optical disk 1 based on the reflected light. A detection signal Sp corresponding to the existing pit is generated at the detection rate Rp and output to the reproduction circuit 10 and the address extractor 15.

  Next, the reproduction circuit 10 amplifies the output detection signal Sp with a predetermined amplification factor based on the control signal Ss3 output from the CPU 17, shapes the waveform thereof, generates the reproduction signal Spr, and generates a decoder. 11 is output.

  The decoder 11 decodes the reproduction signal Spr by a decoding method corresponding to the encoding method in the encoder 8 based on the control signal Ss3 output from the CPU 17, generates the decoded signal Sdd, and detects the detection signal Sdd. The data is output to the reproduction buffer memory 12 at a speed corresponding to the rate Rp.

  The reproduction buffer memory 12 temporarily stores the input decode signal Sdd as it is. At this time, the reproduction buffer memory 12 always outputs a data amount signal Smp indicating the data amount of the accumulated decode signal Sdd to the CPU 17.

  Based on the control signal Ss6 output from the CPU 17, the decompression circuit 13 outputs the decode signal Sdd temporarily stored in the reproduction buffer memory 12 to the detection rate Rp of the detection signal Sp or lower than that. Reading is performed at the rate Mp, the decoded signal Sdd that has been read is subjected to expansion processing corresponding to the compression processing in the compression circuit 5, and the expansion signal So is generated and output to the D / A converter 14.

  The D / A converter 14 converts the decompressed signal So into an analog signal, generates an output signal Sout corresponding to the information signal Sin, and outputs the output signal Sout to the outside.

  The address extractor 15 obtains the address information signal Sda on the disk 1 as pre-information by decoding the output detection signal Sp based on the control signal Ss8 output from the CPU 17 and outputs it to the CPU 17. .

  Along with the information recording and information reproduction operations described above, the CPU 17 outputs the control signals Ss1 to Ss8 so as to execute the processing shown in the flowchart described later, based on the data amount signal Smp or Smr. At this time, the operation unit 19 outputs an instruction signal Sc corresponding to an operation performed by the user or the like to the CPU 17, and the CPU 17 outputs the control signals Ss1 to Ss8 based on the instruction signal Sc.

  In parallel with this, the CPU 17 generates a control signal Ss9 for servo-controlling the spindle motor 16 and the pickup 2 and outputs the control signal Ss9 to the servo circuit 18. The servo circuit 18 is based on the control signal Ss9. The spindle control signal Ssm for controlling the rotation of the pickup 2 is generated and output to the spindle motor 16, and the pickup control signal Ssp for so-called tracking servo control and focus servo control in the pickup 2 is generated and the pickup Output to 2. The pickup 2 records the recording signal Sr or detects the detection signal Sp while performing tracking servo control and focus servo control on the light beam B based on the pickup control signal Ssp.

  Information necessary for the user to control the operation of the information recording / reproducing apparatus S described above is displayed on the display unit 20 based on the display signal Sdp from the CPU 17.

  Next, the recording / reproducing operation according to the present application in the information recording apparatus S having the above configuration will be described with reference to FIGS.

  First, when the optical disk 1 is placed on a turntable (not shown) of the information recording apparatus S, the CPU 17 moves the pickup 2 to the vicinity of the start position of the lead-in area and irradiates the reading beam. Then, it is determined whether or not the reflected light from the optical disc includes an RF signal component that bears the sub information signal. If the RF signal is included, the sub information signal in the lead-in area and the lead-out area is determined. Reading is performed, and the final recording position (final recording address) where the sub information signal in each area is recorded is stored as sub information signal recording information in an internal RAM (not shown) of the CPU 17. On the other hand, if no RF signal is included, it is assumed that an unrecorded disc that has never been recorded is placed, and the start address of the lead-in area / lead-out area is set as the final recording address. Is stored in the internal RAM (step S1).

  Next, the CPU 17 determines whether or not an instruction signal Sc for designating an operation mode is supplied from the user via the operation unit 19, and when the instruction signal Sc is not supplied (step S2; no) ), The process proceeds to step S3, where the sub-information signal recording information stored in step S1, that is, the final recording address of the sub-information signal recorded in each of the lead-in area and lead-out area, It is determined whether it is smaller than each final address in the out area (step S3). In step S3, if there is an unrecorded area of the sub information signal in the lead-in area / lead-out area, that is, if the final recording address is smaller than the final address (step S3; yes), the pickup 2 is removed. A control signal Ss7 is output to the slider 3 to be transferred to the address next to the last recording address in the lead-in area or the lead-out area indicated by the sub information signal recording information (step S4).

  Next, the CPU 17 outputs the control signal Ss4 so that the sub information signal stored in the memory 7 is encoded by the encoder 8, and outputs the control signal Ss2 to record the encoded signal Sed output from the encoder 8. The sub information signal is converted from the signal Sr, and the sub information signal from the position on the disk where the pickup 2 is transferred in step S4 (the address next to the last recording address in the lead-in area or the lead-out area, that is, the additional position of the sub information signal) Are recorded for each unit block (for example, data amount equal to one ECC (Error Collecting Code) block) (step S5).

  Next, the CPU 17 updates the sub information signal recording information in the internal memory with a new final recording address based on the execution of Step S5, and proceeds to Step S2 (Step S6).

  On the other hand, if there is no unrecorded area of the sub information signal in the lead-in area / lead-out area in step S3, that is, if the final recording address is not smaller than (or equal to) the final address (step S3; no) Since the sub-information signal has already been recorded in the lead-in area and lead-out area, the process proceeds to step S2 to prepare for a new operation instruction.

  As described above, when the instruction signal Sc is not supplied to the information recording device S, it is determined that the information recording device S is in a standby state of the recording operation and the reproducing operation of the main information signal, and the lead-in area and The sub information signal is recorded in the lead-out area. That is, the information recording apparatus S regards the state where no instruction signal is supplied from the operation unit 20 as having occurred, and records the sub information signal in the unused time.

  The sub information signal recording information stored in the internal RAM is cleared each time the optical disc 1 is ejected from the information recording device S.

  Next, when the instruction signal Sc is supplied from the operation unit 19 in step S2, it is determined whether or not the operation indicated by the instruction signal Sc is an information recording operation (step S7). When it is an operation (step S7; yes), the process proceeds to an information recording process (step S8) described later.

  On the other hand, when it is determined in step S7 that the information recording operation is not performed (step S7; no), it is determined whether the operation indicated by the instruction signal Sc is an information reproducing operation (step S9).

  If it is determined in step S9 that the operation is an information reproduction operation (step S9; yes), the process proceeds to an information reproduction process (step S10) described later.

  On the other hand, if the operation designated by the instruction signal Sc is not an information reproduction operation in step S9, an error is displayed on the display unit and the corresponding operation cannot be performed, and a step S2 is prepared in preparation for the arrival of a new instruction signal Sc. Migrate to

  Next, the processing operation when the instruction signal Sc instructs the information recording operation will be described with reference to FIG.

  In step S7, if the CPU 17 determines that the instruction signal Sc indicates an information recording operation (step S7; yes), the control signal Ss5 is output and A / D conversion and compression of the information signal Sin to be recorded is performed. The processing is performed at a speed corresponding to the input rate Mr, and the compressed information signal Spd is stored in the recording buffer memory 6 (step S801).

  Next, the CPU 17 determines, based on the data amount signal Smr from the recording buffer memory 6, whether or not the accumulated data amount in the recording buffer memory 6 is equal to or larger than a first predetermined amount set in advance (step). S802). When the amount of data stored in the recording buffer memory 6 is equal to or greater than the first predetermined amount (step S802; yes), the control signal Ss7 is output to the slider 3 to record the recording signal Sr to be recorded. The upper position (address) is searched, and the light spot of the light beam B is moved to the searched position (step S803).

  Then, the control signal Ss4 is output to the encoder 8, and a second predetermined amount of compression information signal Spd set in advance is read from the recording buffer memory 6 to generate an encode signal Sed for the compression information signal Spd. The control signal Ss2 is output to the recording circuit 9 to generate a recording signal Sr corresponding to the encoded signal Sed. The recording signal Sr is picked up by the pickup 2 and recorded on the optical disc 1 at the recording rate Rr (step S804). .

  On the other hand, if it is determined in step S802 that the amount of data stored in the recording buffer memory 6 has not reached the first predetermined amount (step S802; no), the recording signal Sr corresponding to the information signal Sin. The sub information signal recording information stored in the internal memory, that is, the final recording address of the sub information signal recorded in each of the lead-in area and the lead-out area is It is determined whether it is smaller than each final address in the lead-out area (step S805).

  In step S805, if there is no sub-information signal unrecorded area in the lead-in area / lead-out area, that is, if the final recording address is equal to the final address (step S805; no), the process returns to step S802. The recording operation is suspended until the amount of data stored in the recording buffer memory reaches the first predetermined amount.

  On the other hand, if there is an unrecorded area of the sub information signal in the lead-in area / lead-out area in step S805, that is, if the final recording address is smaller than the final address (step S805; yes), the pickup is performed. 2 is transferred to the additional recording position of the sub information signal in the lead-in area or lead-out area based on the sub-information signal recording information (step S806).

  Next, the CPU 17 provides the encoder 8 with a unit block (for example, data amount equal to one ECC block) output from the sub information signal memory 7 instead of the compressed information signal Spd output from the recording buffer memory 6. The control signal Ss4 is output to encode the sub information signal, and the control signal Ss2 is output to the recording circuit 9 to convert the encode signal Sed corresponding to the sub information signal output from the encoder 8 into the recording signal Sr. In step S806, recording is performed at the position (lead-in area or lead-out area) on the disk to which the pickup 2 has been transferred (step S807).

  Then, the CPU 17 updates the sub information signal recording information in the internal memory with the new final recording address that has been changed based on the execution of Step S807, and proceeds to Step S802 again (Step S808).

  By the above steps S806 to S808, the period until the compressed information signal Spd corresponding to the information signal Sin is accumulated in the recording buffer memory 6 by the first predetermined amount, that is, the recording operation of the information signal originally of the pickup 2 is made to wait. The lead-in area and the lead-out area are formed using the period.

  The first predetermined amount is determined based on the capacity Br of the recording buffer memory 6 from the determination in step S802 to the movement of the pickup 2 in step S803 until the recording of the recording signal Sr is started. Even if the signal Spd continues to be accumulated in the recording buffer memory 6 at the input rate Mr, the recording buffer memory 6 is set to a predetermined amount that does not become full. The second predetermined amount may be the same as the first predetermined amount, or the compressed information signal Spd newly accumulated in the recording buffer memory 6 during recording position search or recording signal Sr recording. In consideration of this amount, a predetermined amount larger than the first predetermined amount may be used to discharge all the compressed information signals Spd accumulated in the recording buffer memory 6.

  After executing step S804, the CPU 17 determines whether or not all information to be recorded (information signal Sin) has been recorded (step S809). If not all are recorded (step S809; no), the CPU 17 again. The process of step S802 to step S809 is repeatedly executed until the process proceeds to step S802 and all information to be recorded is recorded.

  On the other hand, if it is determined in step S809 that all information to be recorded has been recorded (step S809; yes), the process proceeds to step S810, and an instruction for an information reproduction operation is given from the operation unit 19. It is determined whether or not. This step S810 is necessary when the information signal just recorded is confirmed immediately. In step S810, if a reproduction operation instruction is given, the recording process is terminated, and the process proceeds to step S2 (FIG. 2).

  On the other hand, if it is determined in step S810 that no information reproducing operation has been instructed (step S810; no), the process proceeds to step S811 to perform the final processing of the recording operation, and the sub-memory stored in the internal memory. It is determined whether or not the information signal recording information, that is, the final recording address of the sub information signal recorded in each of the lead-in area and the lead-out area is smaller than each final address of the lead-in area and the lead-out area ( Step S811).

  If there is an unrecorded area of the sub information signal in the lead-in area / lead-out area in step S811, that is, if the final recording address is smaller than the final address (step S811; yes), the pickup 2 is moved. A control signal Ss7 is output to the slider motor 3 to be transferred to the additional recording position in the lead-in area or lead-out area indicated by the sub information signal recording information (step S812).

  Next, the CPU 17 outputs the control signal Ss4 so that the sub information signal stored in the memory 7 is encoded by the encoder 8, and outputs the control signal Ss2 to record the encoded signal Sed output from the encoder 8. The signal is converted into the signal Sr, and the sub information signal is recorded at the additional recording position (lead-in area or lead-out area) on the disk to which the pickup 2 has been transferred in step S812 (step S813).

  Next, the CPU 17 updates the sub information signal recording information in the internal memory with a new final recording address based on the execution of Step S813, and proceeds to Step S811 (Step S814).

  On the other hand, if it is determined in step S811 that no sub-information signal unrecorded area exists in the lead-in area / lead-out area, that is, if the final recording address is not smaller (equal) than the final address (step S811). S811; no), since the sub information signal has been recorded over the entire lead-in area and lead-out area, the information recording process is terminated.

  Next, the information recording processing operation described with reference to FIG. 3 will be described with reference to FIG. 4 focusing on the change in the amount of data stored in the recording buffer memory 6. FIG. 4 shows a change in the amount of data stored in the recording buffer memory 6 when information recording is instructed, and is shown by a shaded area in the diagram showing the state of the pickup 2 in FIG. The recording signal Sr is recorded during the time zone, and the sub information signal for the unit block is recorded during the time zone indicated by the white area.

  When information recording is instructed at time t1 (see step S7), accumulation of the compressed information signal Spd in the recording buffer memory 6 is started at the input rate Mr (see step S801), and the amount of accumulated data is the same as the above. The sub-information output from the sub-information signal memory 7 by transferring the pickup 2 to the additional recording position of the lead-in area or lead-out area indicated by the sub information signal recording information during the period up to the time t2, which is the first predetermined amount. A recording signal Sr corresponding to the signal is recorded (see step S806 and step 807 above). Then, at time t2 when the accumulated data amount becomes the first predetermined amount, the recording operation of the sub information signal is interrupted and the sub information signal recording information is updated (see step S808), and the new recording signal Sr is updated. The recording position is searched, and recording of the recording signal Sr is started from time t3 (see step S803 and step S804).

  When the recording of the recording signal Sr by the second predetermined amount is completed at time t4, the sub information signal recording information indicates that the sub information signal is to be recorded again in the lead-in area or lead-out area. The pickup 2 is moved to the next recording position, and the sub information signal is recorded from time t5 until the amount of data stored in the recording buffer memory 6 becomes equal to or greater than the first predetermined amount (that is, until time t6).

  After the amount of data stored in the recording buffer memory 6 exceeds the first predetermined amount, the pickup 2 is moved to the recording position and the recording signal Sr corresponding to the information signal Sin is recorded.

  Thereafter, the above-described operation is repeated until all the information signals Sin to be recorded are recorded or until all the sub information signals are recorded in the lead-in area and the lead-out area.

Note that the amount of accumulated data in the recording buffer memory 6 is the amount of accumulated data during the period from when the information recording is instructed until the movement of the pickup 2 to the recording position is completed (that is, the period from time t1 to t3). Increases at the input rate Mr, and when the recording signal Sr corresponding to the compressed information signal Spd is actually recorded, the amount of stored data is R = (input rate Mr) − (recording rate Rr)
It decreases at the rate R indicated by Then, when the recording of the sub information signal is resumed, the input of the information signal Sin is continued, so that the accumulated data amount increases again at the input rate Mr, and this change is repeated thereafter.

  As described above, according to the operation of the information recording / reproducing apparatus S of the embodiment, the recording signal corresponding to the information signal Sin input from the outside is continuously recorded and the amount of data stored in the recording buffer memory 6 is changed. Thus, since the sub information signal is recorded in the lead-in area / lead-out area, it is apparent that the recording of the information signal Sin and the recording of the sub-information signal can proceed simultaneously when viewed in the information reproducing apparatus S as a whole. .

  Next, the processing operation in the case where the instruction signal Sc instructs the information reproduction operation in step S2 in FIG. 2 will be described with reference to FIG.

  The information reproduction process described below is performed before the final process (steps S811 to S814) of the recording operation after the recording of the information signal in the information recording operation is completed (step S809; yes). When an instruction is given, that is, when it is determined in step S810 in FIG. 3 that an information reproduction operation instruction is given (step S810; yes), the sub-information signal in the lead-in area / lead-in / out area It is also assumed that there is a state in which the recording is not completed.

  First, in step S9 in FIG. 2, when the CPU 17 determines that the instruction signal Sc instructs an information reproducing operation (step S9; yes), the CPU 17 outputs the control signals Ss1, Ss3, Ss6, and Ss7 for reproduction. The position on the optical disk 1 where the power recording signal Sr is recorded is searched, the light spot of the light beam B is moved to the searched position, and the generation of the detection signal Sp is started at the detection rate Rp. Decoding of the detection signal Sp by the decoder 9 is started and stored in the reproduction buffer memory 12. Further, the decode signal Sdd stored in the reproduction buffer memory 12 is read out at the output rate Mp, and decompression processing by the decompression circuit 13 is performed (step S101). By this step S101, the decode signal Sdd is accumulated in the reproduction buffer memory 12 at a speed corresponding to the difference between the detection rate Rp and the output rate Mp.

  Next, based on the data amount signal Smp from the reproduction buffer memory 12, the CPU 17 determines whether or not the free capacity of the reproduction buffer memory 12 is equal to or less than a preset third predetermined amount (step S102). ). Here, the third predetermined amount is, for example, a data amount equal to one ECC block in the decoded signal Sdd.

  If it is determined in step S102 that the free space in the reproduction buffer memory 12 becomes equal to or smaller than the third predetermined amount (step S102; yes), the reproduction buffer memory 12 becomes full when the generation of the detection signal Sp is continued. As a result, the reading operation by the pickup 2 is temporarily interrupted, and the detected detection position is stored in the internal memory (step S103).

  Next, the sub information signal recording information stored in the internal memory, that is, the final recording address of the sub information signal recorded in each area of the lead-in area and the lead-out area, It is determined whether it is smaller than the address (step S104).

  If there is no sub-information signal unrecorded area in the lead-in area / lead-out area in step S104, that is, if the final recording address is equal to the final address (step S104; no), the process returns to step S102. The reproduction detection operation is suspended until the free space in the reproduction buffer memory becomes larger than the third predetermined amount.

  On the other hand, if there is an unrecorded area of the sub information signal in the lead-in area / lead-out area in step S104, that is, if the final recording address is smaller than the final address (step S104; yes), the pickup 2 is transferred to the additional recording position of the sub information signal in the lead-in area or lead-out area based on the sub-information signal recording information (step S105).

  Next, the CPU 17 outputs a control signal Ss4, causes the encoder 8 to encode the sub information signal Scd for a unit block output from the memory 7 storing the sub information signal, and also causes the recording circuit 9 to control the control signal Ss4. Ss2 is output, the encode signal Sed corresponding to the sub information signal Scd output from the encoder 8 is converted into a recording signal Sr, and the recording signal Sr is read on the position (read) on the disk to which the pickup 2 is transferred in step S105. In-area or lead-out area) (step S106).

  Then, the CPU 17 updates the sub information signal recording information in the internal memory with the new final recording address changed based on the execution of step S106, and proceeds to step S102 again (step S107).

  On the other hand, if it is determined in step S102 that the free capacity of the reproduction buffer memory 12 is not less than or equal to the third predetermined amount (step S102; no), the reproduction detection position stored in step S103 is searched (step S108). Subsequently, the recording signal Sr is detected to generate the detection signal Sp (step S109).

  Next, the CPU 17 determines whether or not all information to be reproduced has been reproduced (step S110), and when reproduction of all information has been completed (step S110; yes), the reproduction circuit 10 and the decoder. 11 is stopped, the process proceeds to step S111, and the sub information signal recording information stored in the internal memory, that is, the sub information signal recorded in each of the lead-in area and the lead-out area is recorded. It is determined whether or not the final recording address is smaller than the final addresses of the lead-in area and the lead-out area (step S111).

  In step S111, if there is an unrecorded area of the sub information signal in the lead-in area / lead-out area, that is, if the final recording address is smaller than the final address (step S111; yes), the pickup 2 is removed. It is transferred to a write-once position in the lead-in area or lead-out area indicated by the sub information signal recording information (step S112).

  Next, the CPU 17 outputs the control signal Ss4 and encodes the sub information signal Scd stored in the memory 7 using the encoder 8, and outputs the control signal Ss2 and records the encoded signal Sed output from the encoder 8. The signal is converted into the signal Sr, and the sub information signal is recorded at the additional recording position (lead-in area or lead-out area) on the disk to which the pickup 2 has been transferred in step S112 (step S113).

  Next, the CPU 17 updates the sub information signal recording information in the internal memory with a new final recording address based on the execution of Step S113, and proceeds to Step S111 (Step S114).

  On the other hand, if it is determined in step S111 that no unrecorded area of the sub information signal exists in the lead-in area / lead-out area, that is, if the final recording address is not smaller than (or equal to) the final address (step S111). S111; no), since the sub information signal has been recorded over the entire lead-in area and lead-out area, the information reproduction process is terminated.

  Next, the information reproduction processing operation described with reference to FIG. 5 will be described with reference to FIG. 6 with a focus on changes in the amount of data stored in the reproduction buffer memory 12. FIG. 6 shows a change in the amount of data stored in the reproduction buffer memory 10 when information reproduction is instructed, and is shown by a shaded area in the diagram showing the state of the pickup 2 in FIG. The recording signal Sr is detected during the time zone, and the time zone indicated by the white area indicates that the sub-information signal for the unit block is being recorded.

When information reproduction is instructed at time tt1, the amount of data stored in the reproduction buffer memory 12 (capacity is Bp) is
R = (detection rate Rp) − (output rate Mp)
The detection of the recording signal Sr (detection rate Rp) is started so as to increase at the rate R shown by the following, and then the determination timing of the above step S102 by the first CPU 17 after the free space becomes less than the third predetermined amount Since the detection of the recording signal Sr is stopped at (time tt2), the amount of stored data decreases at the output rate Mp.

  At this time, the pickup 2 is transferred to the additional recording position of the lead-in area or lead-out area indicated by the sub information signal recording information, and the recording signal Sr corresponding to the sub information signal output from the sub information signal memory 7 is recorded. (See step S103 and step S104 above).

  Thereafter, the recording operation of the sub information signal is interrupted and the sub information signal recording information is updated at the determination timing (time tt3) of step S102 by the first CPU 17 after the free space becomes equal to or more than the third predetermined amount. (See step S107), the detection position is searched to resume detection of the recording signal Sr stopped at time tt2, and detection of the recording signal Sr is resumed from time tt4 (steps S108 and S109). reference). Then, since the detection of the recording signal Sr is started again, the accumulated data amount increases again at the rate R. Thereafter, this operation is repeated until all the sub information signals are recorded in the lead-in area and the lead-out area.

  In the above description, an example in which the start position of the lead-out area is fixed (in the example shown in FIG. 7, the diameter of 116 mm or more is the lead-out area) is described. However, depending on the information amount of the main information signal to be recorded Even when the start position of the lead-out area can be made different, the present application can be applied. In other words, the outermost peripheral position of the main information recording area, that is, the start position of the lead-out area is set according to the information amount of the main information signal, and the sub information signal is recorded from the start position to the free time of the recording operation of the main information signal. To do. In this case, in order to effectively use the recording capacity of the optical disc, when adding the main information signal, the main information to be newly added is set with the additional recording position as the start position of the lead-out area set in the previous recording. The start position of the lead-out area may be set again according to the information amount of the signal.

  Further, when the recording operation of the main information signal is continued even after the recording of the sub information signal to the entire lead-out area is completed in the above-mentioned idle time related to the recording operation of the main information signal, that is, FIG. If NO is determined in step S805 in FIG. 7, the innermost position (116 mm in the case of the optical disk shown in FIG. 7) from the innermost peripheral position of the lead-out area to the inner peripheral direction (in the main information recording area of the optical disk shown in FIG. 7). The sub information signal indicating the lead-out may be recorded sequentially. When the information amount of the main information signal is smaller than the recording capacity of the main information recording area (in the case of the optical disk shown in FIG. 7, the diameter is 48 mm to 116 mm), it is necessary to record the sub information signal in the unrecorded portion of the main information recording area. However, according to the above configuration, since the sub information signal is recorded from the outer peripheral side of the main information recording area in the idle time related to the recording operation of the main information signal, the main information signal is recorded by that amount. The remaining recording area is reduced, and the time for recording the sub information signal is shortened.

It is a block diagram which shows schematic structure of the information recording device of embodiment of this application. It is a flowchart which shows the information recording operation | movement of the information recording device of embodiment of this application. It is a flowchart which shows the specific process operation | movement of information recording process step S8 shown in FIG. It is a figure which shows the change of the accumulated data amount of the recording buffer memory 6 of FIG. It is a flowchart which shows the concrete process operation | movement of information reproduction | regeneration processing step S10 shown in FIG. It is a figure which shows the change of the accumulated data amount of the reproduction | regeneration buffer memory 12 of FIG. It is a figure which shows the example of arrangement | positioning of the signal area | region of an optical disk.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2 Pickup 3 Slider 4 A / D converter 5 Compression circuit 6 Recording buffer memory 7 Memory 8 Encoder 9 Recording circuit 10 Playback circuit 11 Decoder 12 Playback buffer memory 13 Expansion circuit 14 D / A converter 15 Address extractor 16 Spindle motor 17 CPU
18 Servo Circuit 19 Operation Unit 20 Display Unit B Light Beam S Information Recording Device Sin Information Signal Sd Digital Information Signal Spd Compressed Information Signal Sed Encode Signal Sr Recording Signal Sp Detection Signal Sdd Decode Signal So Expansion Signal Sout Output Signal Smr, Smp Data Amount Signal Sc Instruction signal S1, S2, S3, S4, S5, S6, S7, S8, S9 Control signal Ssp Pickup control signal Ssm Spindle control signal Sdp Display signal

Claims (16)

An information recording apparatus for recording a main information signal and a sub information signal on an information recording medium,
Recording means for recording the main information signal in a main information recording area and the sub information signal in a predetermined lead-in area and lead-out area, respectively.
Transfer means for transferring the recording means;
Control means for transferring the recording means and recording the sub-recording information signal in an idle time in which the recording means is not recording the main information signal;
Have
The information recording apparatus according to claim 1, wherein the control means controls the recording means and the transfer means so as to record the sub information signal in the main information recording area from the inner circumference position of the lead-out area to the inner circumference.   The information recording apparatus according to claim 1, wherein the control unit records the sub information in the main information recording area after the recording of the sub information signal in the lead-out area is completed.   The control means updates the final recording position where the sub information signal is recorded by the recording means when the sub information signal is recorded to form the lead-in area or lead-out area. The information recording apparatus according to claim 1 or 2.   When the sub information signal is recorded to form the lead-in area or lead-out area, the control means causes the recording means to recognize a final recording position where the sub information signal is recorded. The information recording apparatus according to claim 1 or 2.   The control means has recognition means for recognizing whether all the sub information signals to be recorded in the lead-in area have been recorded or whether all the sub information signals to be recorded in the lead-out area have been recorded. The information recording apparatus according to claim 1, wherein the information recording apparatus is an information recording apparatus.   6. The information recording apparatus according to claim 1, further comprising a detecting unit that detects a period during which no main information signal is recorded as the idle time.   6. The information recording apparatus according to claim 1, further comprising a detecting unit that detects a period during which no main information signal is read as the idle time.   8. The information recording apparatus according to claim 1, wherein the control unit regards a state in which no instruction signal is supplied as a time when the idle time has occurred. An information recording method for recording a main information signal and a sub information signal on an information recording medium,
A transfer step of transferring recording means for recording the main information signal in a main information recording area and the sub information signal in a predetermined lead-in area and lead-out area, respectively;
A control step of transferring the recording means and recording the sub-recording information signal in an idle time in which the recording means is not recording the main information signal;
Have
The information recording method according to claim 1, wherein the control step controls the recording means to transfer the sub information signal to the main information recording area from the inner peripheral position of the lead-out area to the inner periphery.   10. The information recording method according to claim 9, wherein in the control step, after the recording of the sub information signal in the lead-out area is completed, the sub information is recorded in the main information recording area.   In the control step, when the sub information signal is recorded to form the lead-in area or the lead-out area, a final recording position where the sub information signal is recorded is updated by the recording unit. The information recording method according to claim 9 or 10.   In the control step, when the sub information signal is recorded to form the lead-in area or lead-out area, the recording unit recognizes a final recording position where the sub information signal is recorded. The information recording method according to claim 9 or 10.   In the control step, recognition means for recognizing whether all the sub information signals to be recorded in the lead-in area or all the sub information signals to be recorded in the lead-out area are recorded. The information recording method according to claim 9, wherein the information recording method is provided.   The information recording method according to any one of claims 9 to 13, further comprising a detection step of detecting a period during which no main information signal is recorded as the idle time.   The information recording method according to any one of claims 9 to 13, further comprising a detection step of detecting a period during which a main information signal is not read as the idle time.   The information recording method according to any one of claims 9 to 15, wherein in the control step, a state in which an instruction signal is not supplied is regarded as having occurred the idle time.

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