WO2006064703A1

WO2006064703A1 - Information reproduction device, information reproduction method, information reproduction program, and information recording medium

Info

Publication number: WO2006064703A1
Application number: PCT/JP2005/022470
Authority: WO
Inventors: Yoshimichi Nishio; Takaaki Ujiie; Hiroshi Someya; Yoshihiro Hashizuka; Hiroki Goto; Hideaki Tsurumi
Original assignee: Pioneer Corporation
Priority date: 2004-12-17
Filing date: 2005-12-07
Publication date: 2006-06-22
Also published as: JPWO2006064703A1

Abstract

There is provided an information reproduction device capable of rapidly creating TOC information to be used for search afterward while reducing the time before reproduction start of the first music composition information even in a case of a partial disc having no TOC information corresponding to the music composition information which has been recorded. The information reproduction device successively detects music composition information recorded on the partial disc (DK) in the recording order of the music composition information firstly recorded, temporarily stores the detected music composition information in a buffer memory (11A) in the detection order, and reads out the stored music composition information in the detection order so as to reproduce it. While read out of music composition information from the buffer memory (11A) is executed, undetected music composition information is detected from the partial disc (DK) and TOC information is generated according to the contents of all the music composition information which has been detected and is stored in the partial disc (DK).

Description

Specification

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

Technical field

[0001] The present application belongs to the technical field of an information reproducing apparatus, an information reproducing method, an information reproducing program, and an information recording medium, and more specifically, recorded on a recording medium such as an optical disc! Belongs to a technical field of an information reproducing apparatus, an information reproducing method, an information reproducing program for reproducing information, and an information recording medium on which the information reproducing program is recorded.

Background art

Conventionally, a so-called CD (Compact Disc) has been widely used as a reproduction-only recording medium on which music information for reproducing and listening to music is optically readable. . Then, in the playback device for the CD, the music information recorded on the CD is read out in any order instead of the recording order on the CD, and the music corresponding to the music information is reproduced. Various playback modes such as, V and so-called random playback processing can be realized.

[0003] Here, in order to make it possible to realize various playback modes as described above, in the conventional CD, the table of contents information relating to the entire music information recorded on the CD is stored in advance in the read-in area of the CD. It is recorded. This table of contents information is generally referred to as TOC (Table of Content) information. Specifically, for each piece of music information recorded on the CD on which it is recorded, information on the total number of songs, It includes song name information, playback time information for each song, and address information for each song indicating the position on the CD where the beginning of the song information corresponding to each song is recorded. Then, by reading this table of contents information before reading the song information, the recording position on the CD of the song information corresponding to each song can be recognized in advance. It becomes possible. In other words, when the above TOC information cannot be detected before the reproduction of the song information, the recording start position of each song cannot be acquired before the reproduction starts, and the random reproduction processing etc. I can't do that.

[0004] Further, in addition to this TOC information, for each song that should be allowed to start playback from an arbitrary position in one song recorded on the CD, the elapsed playback time from the beginning of that song and The CD power is also recorded at the playback elapsed time in a form embedded in the music information corresponding to the music. The subcode information power indicates the relationship with the recording position information (address information) of the music information to be read. .

[0005] On the other hand, in recent years, it is possible for a user who purchased a CD, such as CD-R (CD-Recordable), to record the song information after the purchase, in addition to the above-mentioned playback-only CD. New CDs are also widely available. Even on such recordable CDs, after the recording of the song information to be recorded is finished, TOC information corresponding to the contents of all the recorded song information is created and can be recorded. In principle, recording is performed on a lead-in area of a CD. Here, the process of recording the TOC information having contents corresponding to the contents of the recorded music information on the CD on which the music information is recorded is generally referred to as a finalizing process.

[0006] Then, by executing this finalization process, TOC information corresponding to the recorded music information of the entire CD is recorded, whereby the recorded music information on the recordable CD is recorded as described above. It is possible to perform playback control such as the above random playback processing by treating it in the same way as the music information recorded on the playback-only CD. In addition to this, the playback device for playback-only CD also records. Music information recorded on a possible CD can be played in the same way as a playback-only CD.

On the other hand, in recent personal computers, it is possible to record music information and the like on the recordable CD by using an optical recording device included therein. At this time, an increasing number of recent operating systems (basic system software) for personal computers end recording music information on recordable CDs without executing the finalizing process. In addition, when the song information is recorded by the recording method, the finalization process is performed, and the CD / DVD (hereinafter, such finalization process is not performed and only the song information is recorded). The number of CDs that have been recorded (called partial disks) is generally increasing. Here, as a first example of the prior art for reproducing the music information from such a partial disc, there is a method described in Patent Document 1, for example.

Patent Document 1: Japanese Patent Laid-Open No. 6-20409

[0009] When the method described in Patent Document 1 determines that the loaded optical disk is a partial disk, all the information recorded in the data recording area in the partial area is reproduced (or set in advance). By repeating the track jump process for the number of tracks, the subcode information in the information recorded in the data recording area sequentially moves the information unit in the information and the corresponding playback time information, This is a method for generating new TOC information using the collected information.

[0010] As a second example of the prior art for reproducing music information from the partial disc, there is a method described in Patent Document 2 below, for example.

Patent Document 2: Japanese Patent Laid-Open No. 2001-243638

[0011] When the method described in Patent Document 2 determines that the loaded optical disk is a partial disk, first, a so-called on-track signal indicating that a recording beam on the partial disk is irradiated with a light beam. The pickup is moved in the radial direction of the partial disk while detecting the error, and when the on-track signal is not detected, the pickup determines that the information in the data recording area has jumped into the unrecorded area. To do. Then, the timing force is also moved in the opposite direction to detect the address information and reproduction time information of the end position of the recorded area of information. As a result, it is possible to recognize the number of unit information (corresponding to the above-mentioned song information) as a unit of recorded information and the total playback time corresponding to all recorded information. Thus, it is possible to search for subsequent unit information assuming that the total reproduction time divided by the total number of unit information is the reproduction time per unit information.

Disclosure of the invention

Problems to be solved by the invention

However, according to the first prior art described above, and after the TOC information is generated, it is possible to quickly search for song information and perform random playback processing. There is a problem that it takes a very long time to start reproducing the song information.

[0013] Further, according to the second prior art described above, for example, when the entire reproduction time is 60 minutes and ten unit information is recorded during that time, the reproduction time for each piece of music information is If all of them are around 6 minutes, the playback time generated by the second prior art and the actual playback time of each piece of music information are substantially the same, so searching and so on can be performed quickly. On the other hand, if the playback time of the first song information is 33 minutes and the playback time of the remaining nine song information is all around 3 minutes, for example, As a result, the playback time of each song information and the playback time of each piece of music information are significantly different, and as a result, it takes a very long time to perform an accurate song search. There is a problem.

[0014] Therefore, the present application has been made in view of the above problems, and an example of the purpose thereof is a case where a TOC information corresponding to recorded music information does not exist and a partial disc is used. , An information reproducing apparatus, an information reproducing method, and an information reproducing method for reproducing the information, which can quickly generate TOC information used for later retrieval, etc. while shortening the time until the reproduction of the first song information is started An object is to provide an information recording medium in which the program and the information reproduction program are recorded.

Means for solving the problem

[0015] In order to solve the above-described problem, the invention according to claim 1 is configured to sequentially detect recording information recorded on a recording medium such as a partial disk in order of recording from the recording information recorded first. First detection means such as a pickup, storage means such as a buffer memory for temporarily storing the detected recording information in the order of detection, and reading out the stored recording information from the storage means in the order of detection. Replaying means such as an audio decoder for replaying, and second detection means such as a pickup for detecting unrecorded prerecorded information from the recording medium when the record information is being read from the storage means. Based on the contents of the recorded information detected by the first detecting means and the second detecting means, the recording information is re-used for detecting and reproducing the recorded information from the recording medium. Comprising a generation unit such as a CPU for generating the control information, and a recording means of the pickup or the like for recording the reproduction control information said generated on the recording medium. [0016] In order to solve the above-mentioned problem, the invention according to claim 5 sequentially detects recorded information recorded on a recording medium such as a partial disk in the recording order from the first recorded information. A first detection step, a storage step of temporarily storing the detected recording information in a storage means such as a buffer memory in the order of detection, and reading and reproducing the stored recording information from the storage means in the order of detection. A reproducing step, a second detection step of detecting the undetected recording information from the recording medium when the recording information is being read from the storage unit, and a recording information from the storage unit When reading is being performed, the recording information is detected from the recording medium based on the contents of the recording information detected in the first detection step and the second detection step, respectively. Including a generating step of generating reproduction control information used in reproducing, and a recording step of recording the generated reproduction control information on the recording medium.

[0017] In order to solve the above-described problem, the invention according to claim 6 provides a computer included in an information reproducing apparatus for reproducing recorded information recorded on a recording medium such as a partial disk, the recorded information as First detection means for sequentially detecting the recorded information force recorded in the order of recording, storage means for temporarily storing the detected recorded information in the order of detection, and storing the stored recording information from the storage means in the order of detection A reproducing means for reading and reproducing, a second detecting means for detecting unrecorded recording information from the recording medium when the recording information is being read from the storage means, the first detecting means, Based on the contents of the recording information respectively detected by the second detection means, a reproduction control information used for detecting the recording medium force and reproducing the recording information is generated. And a recording unit that records the generated reproduction control information on the recording medium.

[0018] In order to solve the above-described problem, the invention according to claim 7 is the information reproduction program according to claim 6 recorded so as to be readable by the computer.

Brief Description of Drawings

FIG. 1 is a block diagram showing a schematic configuration of an information reproducing apparatus according to an embodiment.

FIG. 2 is a flowchart (I) showing a reproduction process of the embodiment.

FIG. 3 is a flowchart (II) showing a reproduction process of the embodiment. Explanation of symbols

[0020] 1 pickup

2 Spinner motor

3 Servo driver

4 Servo signal processor

5 Amplifier

6 Demultiplexer

7 Audio decoder

8 Image decoder

9, 10 DZA converter

11 memory

11A nota memory

12 CPU

13 Operation unit

14 display

S Information playback device

DK optical disc (partial disc)

LB light beam

BEST MODE FOR CARRYING OUT THE INVENTION

Next, the best mode for carrying out the present application will be described with reference to FIGS. 1 to 3. In each embodiment described below, one or more pieces of music information to be reproduced are recorded, but the TOC information having contents corresponding to the music information has not yet been recorded. This is an embodiment when the present application is applied to an information reproducing apparatus that detects information and reproduces a corresponding song or image.

FIG. 1 is a block diagram showing a schematic configuration of the information reproducing apparatus according to the embodiment, and FIGS. 2 and 3 are flowcharts showing a reproducing process in the information reproducing apparatus.

As shown in FIG. 1, the information reproducing apparatus S according to the embodiment includes a first detection means, a second detection means, a recording means, a termination detection means, an address detection means, a pickup 1, and a spin Dollar motor 2, servo driver 3, servo signal processor 4, amplifier 5, demultiplexer 6, audio decoder 7 as playback means, image decoder 8, D / A (Digital Analog) converter 9 and 10, a memory 11, a CPU 12 as a generation unit, an estimation unit, a search unit, and a time information search unit, an operation unit 13, and a display 14. Further, the memory 11 includes a buffer memory 11A as a storage means for temporarily storing music information to be reproduced by a FIFO (First In First Out) method.

Next, the overall operation will be described.

The optical disc DK loaded in the information reproducing device S is fixed to the spindle motor 2 and rotated at a preset rotation speed. When the music information is reproduced from the rotating optical disc DK, a reproduction light beam LB having a preset intensity is emitted from the pickup 1 and the reflected light is reflected from an optical detector (not shown) in the pickup 1. Is received. As a result, the optical detector generates a detection signal Spu whose amplitude changes in response to a change in the intensity of the received reflected light, and outputs the detection signal Spu to the amplifier 5.

Next, the amplifier 5 amplifies the detection signal Spu with a preset amplification factor, temporarily stores it as the amplification signal Sap in the notch memory 11A, and then receives the control signal Sbm from the CPU 12 Is read out at the timing indicated by and output to the demultiplexer 6.

[0026] Thereby, the demultiplexer 6 is based on the control signal Scd from the CPU 12, and the sound signal Sa corresponding to the sound information including the amplified signal Sap composition information and the image signal Sv corresponding to the image information Are separated and extracted and output to the audio decoder 7 and the image decoder 8, respectively.

Next, the audio decoder 7 decodes the sound signal Sa extracted and separated by the demultiplexer 6 based on the control signal Sea from the CPU 12 by a preset decoding method, A decoded sound signal Sda is generated and output to the DZA converter 9.

[0028] Then, the DZA converter 9 analogizes the decoded sound signal Sda, generates a sound output signal Saout as an analog signal, and outputs the sound output signal Saout to a speaker or the like (not shown) for sound emission.

On the other hand, the image decoder 8 decodes the image signal Sv from which the amplified signal Sap force is also separated and extracted by the demultiplexer 6 based on the control signal Scv from the CPU 12 by a preset decoding method, and decodes the decoded image. Generate signal Sdv and output to DZA converter 10. [0030] Then, the DZA converter 10 converts the decoded image signal Sdv into an analog signal, generates an image output signal Svout as an analog signal, and outputs and displays the image output signal Svout on a display (not shown) or the like.

On the other hand, the control of the rotational speed of the spindle motor 2 is executed so that the optical disk DK is rotated at a constant rotational speed by servo processing based on the control signal Scss from the servo driver 3.

[0032] Further, with respect to the irradiation position of the optical beam LB on the optical disc DK, the focus servo processing for controlling the irradiation position in the direction perpendicular to the recording layer of the optical disc DK and the direction parallel to the recording layer (ie It is controlled by co-operation with tracking servo processing that controls the irradiation position in the radial direction of the optical disc DK. These two servo processes are realized by outputting the control signal Sep from the servo driver 3 to each of the focus servo process and tracking servo control functions. In addition to this, when moving the irradiation position of the light beam LB in the radial direction of the optical disc DK beyond the movable range of the objective lens (not shown) in tracking servo processing (for example, when performing so-called track jump) The carriage servo process for moving the pickup 1 itself as a whole in the radial direction of the optical disc DK is performed based on the control signal Sep.

[0033] For this reason, the servo driver 3 controls the control signal so that the necessary servo processing is executed on the pickup 1 and the spindle motor 2 based on the control signal Scs of the servo signal processing unit 4 force. Sep and Scss are generated and output to the pickup 1 and spindle motor 2, respectively.

Furthermore, the servo signal processing unit 4 generates the control signal Scs based on the control signal Sec from the CPU 12 so that the generation process of each control signal Scss and Sep in the servo driver 3 is normally executed. And output to the servo driver 3.

In parallel with the processing of each of these constituent members, the CPU 12 controls each of the control signals Sec, Scd so that an operation corresponding to the content is executed based on the content of the operation signal Sin from the operation unit 13. , Scv and Sea are generated and output to the corresponding constituent members described above, and the respective constituent members are collectively controlled. The information necessary for the overall control is the memory signal Sm and Then, it is output and temporarily stored in an area other than the area corresponding to the buffer memory 11A in the memory 11, and further read out from the area in the memory 11 again as a memory signal Sm as necessary. Is output to the necessary processing. Furthermore, necessary information to be notified to the user, such as the operating state of the information reproducing apparatus S, is displayed on the display 14 based on the display signal Sdp from the CPU 12.

Next, the music information reproduction process according to the embodiment, which is executed mainly by the CPU 12, the buffer memory 11A, and the servo signal processing unit 4, will be described with reference to FIGS. 1 to 3. FIG.

[0037] As shown in FIG. 2, in the reproduction processing according to the embodiment, when any optical disc DK is loaded in the information reproducing apparatus S (step S1), whether the optical disc DK is a partial disc. First, confirm whether or not (step S2). If the optical disc DK is a partial disc! / (Step S2; NO), it can be determined that the optical disc DK is a normal playback-only optical disc DK. The information recorded and reproduced using the reproduction method is reproduced (step S3), and the reproduction process according to the embodiment is terminated.

[0038] On the other hand, in step S2, the loaded optical disc DK is a partial disc.

(Hereinafter, the partial disc is referred to as a partial disc DK as appropriate) (Step S2; YES), then the end position of the recorded area of the song information in the partial disc DK (that is, the partial disc DK The number of pieces of music information recorded in the recorded area up to the end position and the partial disc DK at the end position. The upper address is detected (step S4). In addition, specifically, for example, the method described in Patent Document 2 can be used as the processing in step S4.

[0039] If the position of the end of the recorded area is detected, then the first piece of recorded music information is reproduced assuming that the leading force of the music information is also reproduced in the recording order (step S5).

[0040] Here, in the process of step S5, the first piece of music information is optically detected from the partial disc DK through the pickup 1 at a preset detection speed, and is stored in the buffer memory 11A. It is executed by reading it at a preset reading speed and outputting it to the demultiplexer 6. At this time, from the above partial disk DK The detection speed is set faster than the reading speed from the buffer memory 11A. Therefore, the storage of the song information in the nother memory 11A is faster than the readout, and as a result, the song information from the partial disc DK is temporarily detected when the nota memory 11A is full. Even if it stops, the playback can be continued by continuing reading from the nota memory 11A.

[0041] While the music information is continuously being stored in the nota memory 11A, while the reproduction is being executed, the amount of music information stored in the buffer memory 11A is monitored, and the amount of storage is preset. The confirmation of whether or not the force is greater than a predetermined amount of threshold (specifically, for example, an accumulated amount corresponding to 10 seconds of music information) is repeated (step S6, step S6; NO).

[0042] Next, in the determination of step S6, when the accumulated amount in the nota memory 11A exceeds the above threshold (step S6; YES), the reproduction of the music information itself continues by reading the buffer memory 11A. At the same time, detection of song information from the partial disc DK is temporarily interrupted, and TOC information that has not yet been created is generated (step S7). For example, the method described in Patent Document 1 can be used to generate the TOC information at this time.

[0043] After generation of TOC information is started, it is always monitored whether it is completed (step S8). If it is completed (step S8; YES), it is generated. The TOC information is recorded in a predetermined area (for example, the lead-in area in the partial disc DK), and the detection processing of the interrupted music information from the partial disc DK is resumed (step S9). Then, at a necessary timing after the playback, the reproduction processing is performed while executing the necessary retrieval processing while referring to the generated and recorded TOC information by the same method as the retrieval processing in the conventional CD, for example.

[0044] On the other hand, if the determination in step S8 is that the TOC information has not yet been completed (step S8; NO), then the amount of song information stored in the nota memory 11A is equal to the threshold value. Confirm whether or not the force is as follows (Step S10) .If the accumulated amount is not less than the threshold (Step S10; NO), repeat Step S7 to continue the generation of TOC information. Return to.

On the other hand, in the determination of step S 10, the amount of music information stored in the buffer memory 11 A is the threshold value. If the value is less than or equal to the value (step S10; YES), the reproduction process by only reading from the buffer memory 11A is continued as it is, and the accumulated amount in the buffer memory 11A becomes too small (that is, Since the song playback process may be interrupted (so-called underflow condition), the process of detecting the partial disk DK power of the song information for generating the TOC information is temporarily interrupted. The music playback process (that is, the process of detecting the music information corresponding to the first music from the partial disc DK) is resumed (step S11), and the process returns to step S6 and the subsequent processes are repeated.

[0046] Next, when the TOC information is being created in the playback process shown in FIG. 2 and the TOC information is incomplete, the recording position of the song information is searched for reproduction on the partial disc DK. FIG. 3 shows a provisional music information search method when an operation to this effect is executed in the operation unit 13.

First, as a premise of the search method shown in FIG. 3, detection of the end position of the recorded area of the song information in the partial disc DK as the processing of step S4 above, and in the recorded area up to the end position Assume that the detection of the number of recorded music information and the detection of the address on the partial disk DK at the end position have been completed, and TOC information is actually being created by the processing of steps S7 and S8 shown in Fig. 2. Suppose that

[0048] As shown in FIG. 3, during the creation of the TOC information, the address on the partial disk DK at the end position of the recorded area detected in the process of step S4 in FIG. Based on the total playback time of the entire song information that is currently recorded! And based on the calculated total playback time and the number of pieces of song information detected by the processing in step S4. Then, the average playback time per song is calculated by (total playback time ÷ number of song information), stored in an area other than the buffer memory 11 A in the memory 11, and stored in the operation unit 13. Prepare for the search command (step S15).

[0049] Next, after the process of step S15 is executed, whether or not the TOC information is complete is constantly monitored (step S16). If completed, the TOC information is monitored (step S16; YES). The generated TOC information is recorded in a predetermined area (for example, the lead area in the partial disc DK), and the necessary search processing is performed using the recorded TOC information and other information detected from the partial disc DK. Each information is stored in the memory 11 The data is stored in an area other than the memory 11A (step S20), and the reproduction process shown in FIG. 2 is continued.

[0050] On the other hand, if the TOC information is not yet completed in the determination in step S16 (step S16; NO), the search unit for reproducing the song is then performed by the user in the operation unit 13. It is confirmed whether or not the operation for performing the operation has been performed (step S17).

[0051] When the operation is not performed (step S17; NO), the TOC information is continuously created (step S16). On the other hand, when an operation for performing a search process for playing a song is performed in the determination in step S17 (step S17; YES), the process in step S7 in FIG. 2 is performed at that timing. Confirms whether or not at least the playback time information for the first piece of song information and the address information indicating the recording position have been acquired (step S18). If not completed (step S 18; NO), the process returns to step SI 5 and waits for a provisional search.

[0052] On the other hand, if it is determined in step S18 that playback time information for one or more songs has been acquired (step S18; YES), search for other undetected song information based on that information. Is generated and temporarily stored in an area other than the buffer memory 11A in the memory 11 (step S19), the process returns to the process in step S16 to check the completeness of the TOC information. After that, if it is completed (Step S16; YES), search using that TOC information (Step S20). If the TOC information is incomplete (Step S16; NO), again Step SI7 and subsequent steps are executed.

[0053] When the playback time information for one song has not been acquired by the process shown in Fig. 3 described above (step S18; NO), the average playback time information generated in step S15 above, etc. When the playback time information is acquired even for only one song (step S18; YES), the playback time information obtained is more accurate. It is possible to search for song information necessary for the recording.

Next, the search information generation process in step S19 will be described. In the following description, as an example, the total playback time corresponding to all recorded song information is 60 minutes, the total number of song information is ten, and the actual playback time of the first song is In 33 minutes A description will be given using a case.

[0055] First, when it is attempted to obtain necessary information for search without using the information obtained in the processing up to step S18 (that is, only the information set in step S15 above). ), The estimated playback time for each song is

60 minutes ÷ 10 = 6 minutes each

However, if this information is obtained and an operation for searching for the second song (assuming that the actual playback time is 3 minutes) is performed in step S17, the optical beam LB As for the irradiation position of, the position corresponding to 6 minutes in the head force playback time of the recorded area is searched. However, the actual start address of the second song is the position where the head power of the recorded area corresponds to 33 minutes of playback time, so the current irradiation position is located (from the beginning of the recorded area) 6 minutes It is necessary to further move the irradiation position from the position to the position of 33 minutes by track jump processing etc., and then search for the start address of the second song. Similarly, the start address of the third track is estimated to be the position corresponding to 12 minutes of playback time in the recorded area, but the third track is actually positioned at a position corresponding to 36 minutes. Since there is a head, it is necessary to move the irradiation position again in this case. In either of these cases, a very long search time is required, and when a search for music information recorded at the end as a whole is instructed, a longer time is required.

[0056] On the other hand, when the process in step S19 is executed using the information obtained in the process up to step S18, in the process in step S19, the process before step S18 executed so far is performed. Assuming that the playback time information (33 minutes) of the first song has been acquired in the process, and that the track information has been detected up to 34 minutes at the top playback time of the recorded area. Using the information, the estimated playback time of each of the remaining nine songs is (60 minutes 33 minutes) ÷ 9 songs = 3 minutes each

And can be calculated. Then, using these pieces of information, for example, even if an operation to search for the second song is performed in step S17, 33 minutes from the beginning of the recorded information (that is, the first song) By returning the irradiation position of the light beam LB to the position corresponding to the reproduction end position), the second music can be searched quickly. Similarly, Even if the operation to search for the third song is performed in step S17, the irradiation position of the light beam LB is advanced to the position corresponding to 36 minutes (33 minutes + 3 minutes) from the beginning of the recorded information. This makes it possible to quickly search for the start address of the third song.

[0057] As described above, according to the playback processing according to the embodiment, reading from the buffer memory 11A that temporarily stores song information and starting playback of the corresponding song, further detection is performed in parallel therewith. Since the TOC information is generated and recorded using the song information, even if there is no TOC information corresponding to the recorded song information, the time to start playback of the song information is shortened. TOC information used for subsequent searches etc. can be created at an early stage

[0058] Since the search is performed using the TOC information generated based on the actually reproduced song information, the desired song information can be searched accurately.

[0059] Further, when searching for song information when generation of TOC information is not completed, the reproduction time of song information is estimated based on the end position of the area where the song information has been recorded and the address of the end position. Since the song information is searched based on the estimated playback time, the song information search can be roughly executed even before the TOC information is completely generated.

[0060] Furthermore, when the partial disk DH is a CD, even if there is no TOC information for the playback control, it is used for a later search or the like while shortening the time until the music information playback starts. TOC information can be created early.

[0061] In the above-described embodiment, the case where the partial disc DK is a CD has been described. However, playback control information similar to the CD is generated, and playback control is performed based on this. In this case, the present application can be applied to these regardless of the recording capacity and recording density of the optical disc itself, or the number of recording layers.

[0062] Further, the programs corresponding to the flowcharts shown in Fig. 2 are recorded on an information recording medium such as a flexible disk or a hard disk, or acquired and recorded via the Internet or the like. By reading and executing by a computer, the computer can be used as the CPU 12 according to the embodiment.

Claims

The scope of the claims

[1] First detection means for sequentially detecting record information recorded on the recording medium in the order of recording from the record information recorded first;

Storage means for temporarily storing the detected recording information in the order of detection;

Reproduction means for reading out and reproducing the stored recording information from the storage means in the order of detection;

Second reading means for detecting unrecorded recording information from the recording medium when the recording information is being read from the storage means;

Based on the contents of the recording information detected by the first detecting means and the second detecting means, the reproduction control information used when detecting and reproducing the recording information from the recording medium is generated. Generating means for

An information reproducing apparatus comprising: recording means for recording the generated reproduction control information on the recording medium.

[2] In the information detection device according to claim 1,

An information reproducing apparatus, further comprising search means for searching for the recorded information based on the recorded reproduction control information.

[3] In the information reproducing apparatus according to claim 1 or 2,

End detection means for detecting an end position of a recorded area on the recording medium on which the recording information is recorded, on the recording medium;

Address detecting means for detecting address information indicating an address on the recording medium indicating the end position;

Estimating means for estimating reproduction time information of the recording information based on the detected end position and the address information when searching for the recording information when generation of the reproduction control information is not completed When,

Time information search means for searching the recorded information based on the estimated reproduction time information;

An information reproducing apparatus further comprising:

[4] In the information detection device according to any one of claims 1 to 3, The information reproducing apparatus, wherein the recording medium is a CD (Compact Disc).

[5] a first detection step of sequentially detecting recording information recorded on the recording medium in the order of recording from the recording information recorded first;

A storage step of temporarily storing the detected recording information in a storage means in the order of detection; a reproduction step of reading out and reproducing the stored recording information from the storage means in the order of detection;

A second detection step of detecting undetected recording information from the recording medium when the recording information is being read from the storage means;

When the recording information is being read from the storage means, the recording information is recorded on the basis of the contents of the recording information detected in the first detection step and the second detection step, respectively. A generation process for generating reproduction control information used when detecting and reproducing from the medium;

And a recording step of recording the generated reproduction control information on the recording medium.

[6] A computer included in an information reproducing apparatus for reproducing recorded information recorded on a recording medium,

First detecting means for sequentially detecting the recorded information in the order of recording information recorded in the first order;

Reproducing means for reading out and reproducing the stored recording information from the storage means in the order of detection;

Second reading means for detecting undetected recording information from the recording medium when the recording information is being read from the storage means;

Based on the contents of the recording information detected by the first detecting means and the second detecting means, the reproduction control information used when detecting and reproducing the recording information from the recording medium is generated. Generating means, and

Recording means for recording the generated reproduction control information on the recording medium;

A program for reproducing information, characterized in that it functions as a program. 7. An information recording medium, wherein the information reproducing program according to claim 6 is recorded so as to be readable by the computer.