JP2005135494A - Information processing apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processing apparatus capable of preventing the duplication disable state of data originally permitted to be duplicated for a recorder capable of reproducing a multi-session recording medium and connected to the outside or incorporated, and an information processing method. <P>SOLUTION: In reproducing CD-DA data of a multi-session disk D3 whose 1st session is a CD-DA format and 2nd session is a ROM format for the purpose of digitally copying the data into the other recorder, a reproducing device first reads TOC information, accesses the track of the CD-DA format of the 1st session, and finishes TOC reading processing after reading a control bit indicating the CD-DA data. Consequently, the control bit indicating the CD-DA data is outputted to the other recorder. The other recorder recognizes that a disk to be reproduced is the disk having the CD-DA data, thereby digitally copying the CD-DA data. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information processing apparatus and information processing method capable of reproducing a multi-session disc in which data of different formats are recorded, and in particular, a compressed sound source such as MP3 (MPEG (Moving Picture Experts Group) 1 audio Layer 3)) can also be reproduced. The present invention relates to an information processing apparatus and a recording information processing method.

  Conventionally, compact discs that are optical discs include CD-DA (Compact Disc Digital Audio) type compact discs and CD-ROM (Compact Disc Read Only Memory) type compact discs. Furthermore, compact discs include CD-R (Compact Disc Recordable) type compact discs based on the format of CD-DA (Compact Disc Digital Audio) type compact discs, CD-RW (Compact Disc Rewritable) type compact discs, CDs -There are multi-session compact discs such as Extra compact discs. For example, in a CD-Extra compact disc that is a multi-session type, one or a plurality of audio data is recorded in the inner session, and the audio data recorded in the inner session is related to the outer session. Related data such as image data, video data, and computer programs are recorded. As for the multi-session type compact disc, there is the following Patent Document 1.

  As the above-described compact disc playback device, an audio dedicated playback device exclusively for playback of audio data recorded on a compact disc digital audio (CD-DA) type compact disc or the like, and all the above compact discs are used. There are composite playback devices that enable playback.

  Here, the multi-session compact disc will be described as an example. As shown in FIG. 8, the multi-session compact disc 1 is provided with a clamping area 2a around the center hole 2, and this clamping area 2a. The first session 3 in which audio data or the like is recorded is provided on the outer peripheral side of the first session 3, and the second session in which related data related to the first session 3 is recorded on the outer peripheral side of the first session 3. 4 is provided. Each session 3 and 4 is provided with lead-in areas 3a and 4a in which TOC (Table Of Contents) data is recorded on the inner circumference side, and audio data, related data, etc. on the outer circumference side of the lead-in areas 3a and 4a. Program areas 3b and 4b in which one or a plurality of content data are recorded are provided, and lead-out areas 3c and 4c indicating the end of the sessions 3 and 4 are provided on the outer peripheral side of the program areas 3b and 4b. Note that the CD-DA compact disc is composed of one session as a whole.

  In the compact disc 1, data subjected to 8-14 modulation (EFM modulation: Eight to Fourteen Modulation) is recorded in each recording session 3 and 4 in the recording format shown in FIG. That is, as shown in FIG. 10, the frames constituting the data recorded in each session 3 and 4 can handle, for example, 32 symbols (one symbol is composed of 14 bits) as a whole. Thus, a 24-bit synchronization signal (11T, 11T '(' indicates inversion), 2T pattern or the reverse pattern) is provided at the head of the frame, and then sub-code data of one symbol (14 bits) Next, main signal data consisting of 32 symbols and correction parity are provided, and the whole is composed of 588 channel bits. Further, between the symbols, 3 connection bits are inserted except between the frame synchronization signal and the subcode data.

In the subcode data, one symbol is recorded in each frame. In this subcode data, address information and the like are recorded. The 8-bit data before EFM modulation constituting the subcode data is allocated to P, Q, R, S, T, U, V, and W channels. As shown in FIG. 11, the subcode data forms one block with 98 frames, and synchronization signals S ₀ and S ₁ for identifying the head of the block are stored at the head of the block. . For the synchronization signals S ₀ and S ₁ , a pattern not used in the EFM conversion table is used. That is, as shown in FIG. 11, the subcode data constitutes one block with 96 bytes excluding the 2-byte synchronization signal. A block of each channel of P to W of the subcode data is composed of P _{1 to} W ₁ to P _{96 to} W ₉₆ , that is, 96 bits (98 bits including a synchronization signal).

  The P channel of the subcode data is mainly used as a start flag, and the Q channel mainly stores address information and the like, and becomes TOC data in the lead-in areas 3a and 4a. The R to W channels are used for graphics, error checking, etc. as a group of 6 user bits. The TOC data recorded in the lead-in areas 3a and 4a will be described later.

  Furthermore, as shown in FIG. 11, the main signal data provided after the subcode data is composed of 12 symbols, and the correction parity provided after the main signal data is composed of 4 symbols. The correction parity stores a Reed-Solomon code symbol of (Cross Interleave Reed-Solomon Code; CIRC). In one frame, sub-code data is followed by 12 symbol main signal data, followed by 4 symbol correction parity, then 12 symbol main signal data, and then 4 symbol correction. Parity is provided.

  Next, the Q channel of the lead-in areas 3a and 4a, that is, the TOC data will be described with reference to FIG. The Q channel consists of a 4-bit control block CNT, a 4-bit address block ADR, an 8-bit track number block TNO, an 8-bit point block POINT, an 8-bit fractional component block Min, and an 8-bit second in order from the top. A component block Sec, an 8-bit frame component block Frame, an 8-bit zero block ZERO in which “0” is recorded, an 8-bit fractional component block Pmin, an 8-bit second component block Psec, and a frame component block Pframe are provided. Yes.

  When the POINT is 1 to 99, identification data indicating whether the track is for data (ROM type) or audio is recorded in the control block CNT. Specifically, when the point is for data, “1” is set, and “0” is set when the audio is used.

  The address block ADR indicates whether the disc is a CD-DA type disc created in accordance with the Red Book standard or a multi-session type disc created in accordance with the Orange Book standard. Specifically, “1” is set when the disc is created in accordance with the CD-DA type red book standard, and “5” is set when the disc is created in accordance with the multi-session type orange book standard. Is set.

  In the track number block TNO, “0” indicating the lead-in areas 3a and 4a is set.

  When the address block ADR is set to “1” indicating the CD-DA type in the point block POINT, the hexadecimal numbers “A0”, “A1” and “A2” and the decimal numbers “01” to “99” are set. "Is set. When “$ 0” or “$ 20” is set in the second component block Psec when “A0” is set, the first track number is set in the minute component block Pmin. When “$ 10” is set in the second component block Psec, the last track number + 1 is set in the minute component block Pmin. When “A1” is set, the last track number or the last track number + 1 is set in the minute component block Pmin, and “0” is set in the second component block Psec and the frame component block Pframe. When “A2” is set, the start times of the lead-out areas 3c and 4c are set in the minute component block Pmin, the second component block Psec, and the frame component block Pframe. When “01” to “99” are set, the start time of each track is set in the minute component block Pmin, the second component block Psec, and the frame component block Pframe.

  In addition, in the disk in which C0 is set in the point block POINT, when the address block ADR is set to “1”, the absolute time is recorded in the minute component block Min, the second component block Sec, and the frame component block Frame. ing. That is, when C0 is not set in POINT, the absolute time is not recorded in the minute component block Min, the second component block Sec, and the frame component block Frame. Hereinafter, the second component block Sec and the frame component block Frame are also simply referred to as “MSF (Min, Sec, Frame)”.

  In the point block POINT, when the address block ADR is set to “5”, “B0”, “C0”, and the like are set. When “B0” is set, the start time of the next program area is recorded in the MSF. For example, when configured with two sessions, if “B0” is set in the point block POINT of the first session 3, the start time of the program area 4b of the second session 4 is recorded in the MSF. In addition, when configured with 3 sessions, if “B0” is set in the point block POINT of the first session, the MSF indicates the start time of the program area 4b of the second session, and the point of the second session If “B0” is set in the block POINT, the MSF indicates the start time of the program area of the third session.

  When “B0” is set, the maximum start time of the outermost lead-out area is recorded in the minute component block Pmin, the second component block Psec, and the frame component block Pframe.

  “C0” may be set in the point block POINT in the lead-in area of the first session. When “C0” is set, the start time of the first lead-in area is recorded in the minute component block Pmin, the second component block Psec, and the frame component block Pframe.

  Here, the multi-session compact disc accesses only the first session 3 when it is mounted on an audio-only playback device for the purpose of playing back audio data recorded exclusively on a CD-DA compact disc, etc. After reading the TOC data recorded in the lead-in area 3a of one session 3, the audio data recorded in the program area 3b is read. Since the audio-only playback apparatus is intended for playback of audio data, the second session 4 in which data other than audio data is recorded cannot be played back. Specifically, the audio-only playback device ignores the MSF when the point block POINT “B0” or “B0” of the TOC data of the lead-in area 3a of the first session is ignored, and enters the second session 4. The reproduction of the audio data recorded in the program area 3b of the first session 3 is started without access. Therefore, also when playing back a CD-Extra compact disc, the audio-only playback device accesses only the first session in which the audio data is recorded and plays back the read audio data.

  By the way, in the multi-session type compact disc, audio data is recorded in the first session 3 and also in the second session 4 such as MP3 (MPEG (Moving Picture Experts Group) -1 Audio Layer 3). Some audio-only playback devices are compatible with not only CD-DA compact discs but also multi-session compact discs. This is because when the music file is recorded in the second session 4, the purpose is the same as that of an audio-only playback device that supports only the CD-DA compact disc standard in terms of playback of audio data. For this reason, an audio-only playback apparatus that supports the multi-session type operates in the same manner as a composite playback apparatus described below.

  When a multi-session compact disc is loaded into the composite playback device, the TOC data recorded in the lead-in areas 3a and 4a of the first session 3 and the second session 4 is read. Specifically, the composite playback device refers to the MSF at the time of “B0” or “B0” of the point block POINT configuring the TOC data of the lead-in area 3a of the first session, and When there is a TOC data in the lead-in area 4a and there is another session on the outer periphery of the second session 4, the reading of the TOC data of that session is started, and the data recorded in the program area of the session according to the user's designation Start playback.

  Such a multi-session compatible playback apparatus is described in Patent Document 2 below. FIG. 13 is a block diagram showing a playback device described in Patent Document 2 below. In this playback apparatus, audio data (linear PCM) in the same format as an existing CD is recorded in the first part (1st session), and compressed audio data is recorded in the second part (2nd session). This is a playback device that enables playback of a disc.

  As shown in FIG. 13, the reproducing apparatus 200 includes a spindle motor 281 that rotates and drives a disk 201, and an optical pickup 282 that reproduces a signal recorded on the disk 201. The optical pickup 282 transmits laser light to a disk. An optical system such as a semiconductor laser that irradiates 201, an objective lens, a detector that receives return light from the disk 201, a focus and tracking mechanism, and the like. Further, the optical pickup 282 is sent in the radial direction of the disk 201 by the thread mechanism 284.

  An output signal from, for example, a quadrant detector of the optical pickup 282 is supplied to the RF amplifier 283. The RF amplifier 283 generates a reproduction (RF) signal, a focus error signal, and a tracking error signal by calculating an output signal of each detector of the four-divided detector. The reproduction signal is supplied to the selector 285, the lead-in data read from the lead-in area is supplied to the lead-in data extraction unit 286, and the focus error signal and the tracking error signal are supplied to the servo circuit 287. The servo circuit 287 controls the rotation operation of the spindle motor 281 based on the reproduction clock of the RF signal, and controls the focus servo and tracking servo of the optical pickup 282.

  The lead-in data extraction unit 286 decodes the lead-in data from the lead-in area and supplies the decoded data to the CPU 288. The CPU 288 has a function as a system controller that controls the operation of the entire playback apparatus. An operation unit 289 and a display unit 290 are provided in association with the CPU 288. The operation unit 289 is provided with keys for designating the reproduction of the first part / second part, as well as operation keys similar to those of a normal CD reproducing apparatus. By controlling the servo circuit 287 by the CPU 288, the operation of the reproducing apparatus and the access operation to the disk 1 are controlled. In addition, the CPU 288 generates information to be displayed on the display unit 290 based on the subcode information.

  The selector 285 is controlled by the CPU 288 and outputs reproduction data from the first session to the output terminal a, and outputs reproduction data from the second session to the output terminal b. In the non-recorded portion, the terminal c is selected. A first part demodulator 291 is connected to the output terminal a, and a second part demodulator 292 is connected to the output terminal b.

  The first part demodulator 291 performs signal processing similar to CD-DA playback signal processing. That is, the EFM of the reproduction signal is demodulated, and the subcode is separated and output. The subcode is decoded by a decoder, and the decoded subcode (including address information) is supplied to the servo circuit 287 and the CPU 288. The EFM demodulated data is supplied to the error correction unit 297. The error correction unit 297 performs error correction by CIRC. An output of the error correction unit 297 is supplied to a D / A (digital / analog) conversion unit 298, and an analog output is extracted from the D / A conversion unit 298 to an output terminal 299. Although not shown, errors that cannot be corrected by the error correction unit 297 are interpolated.

  The second part demodulator 292 performs signal processing similar to that of the first part demodulator 291. The subcode (including address information) and header information output from the second part demodulator 292 are supplied to the servo circuit 287 and the CPU 288. The EFM demodulated data is supplied to the error correction unit 211. A CD-ROM decoder 212 is connected to the error correction unit 211. The CD-ROM decoder 212 performs a CD-ROM format decomposition process and extracts data recorded as user data. The extracted data is supplied to the decompression unit 213 for compression coding and decompressed. The output of the decompression unit 213 is supplied to the D / A conversion unit 214, and the analog output is extracted from the D / A conversion unit 214 to the output terminal 215.

  The lead-in data extraction unit 286 reads the accompanying information recorded in the lead-in area into the CPU 288 when the disc 201 is loaded. The CPU 288 generates a signal for controlling the selector 285 with reference to the user's designation input by the operation unit 289 and the read information. Thereby, one of the first part and the second part can be selectively reproduced.

  In the playback apparatus described above, when playing back the first part, the CPU 288 controls the selector 285 so that the selector 285 selects the output terminal a. When reproducing the second part, the CPU 288 controls the selector 285 so that the selector 285 selects the output terminal b.

JP-A-8-036829 JP 2002-74848 A

  However, such a multi-session compatible playback device (composite playback device) is connected to an external device such as a mini disc MD (registered trademark) recording device, and the digital audio data of the multi-session disc is sent to the external device. When digital recording is performed on another disk by the external device, the playback device reads the TOC of all sessions and outputs the control bits to the external device as described above. Then, the external device determines whether the data is ROM data or audio data based on the control bit. If the data is ROM data, a non-duplication warning is displayed.

  For example, when the first session (1st session) described in Patent Document 2 is CD-DA PCM data and the second session (2nd session) is ROM data, data as an external device is stored. In a recording device of another recording medium such as a rewritable MD, when the recording standby state is set, a control bit (hereinafter referred to as ROM information) indicating the ROM is input to the external device, so that the recording is performed. Warning that recording is impossible.

  That is, if CD-DA data is recorded in the 1st session, the external recording device indicates the ROM information that was last input, although it can be recorded by the recording device. Since the control bits are stored, the external recording device warns the user that recording is not possible. The same problem occurs when the recording standby is performed before the TOC lead.

  Furthermore, since the control bit information digitally output from the CD section continues to output the control bit information acquired last from the TOC-read disc, the power of the recording destination device is turned off during the TOC read processing of the CD. In addition, there is a problem that even if the power is turned on and the recording standby state is entered after the TOC read process is completed, a recording impossible warning is issued.

  The present invention has been proposed in view of such a conventional situation, and is capable of reproducing a multi-session recording medium and is inherently digital to an externally connected or built-in recording apparatus. An object of the present invention is to provide an information processing apparatus and an information processing method for preventing a copy-prohibited state of data that is permitted to be copied from occurring.

  In order to achieve the above object, an information processing apparatus according to the present invention is an information processing apparatus capable of digitally copying and digitally copying CD-DA data to a digitally connected recording apparatus. A data reading means for reading the data and the management information from a recording medium to be reproduced, each of which is provided with one or more lead-in areas in which the data area in which the data is recorded and the management information for managing the data area are recorded, and the data reading Identification information output means for outputting, to the recording device, data identification information indicating whether or not the data recorded in the data area among the management information read by the means is CD-DA data, and the recording to be reproduced CD-DA data is recorded in the data area of the medium, and the CD-DA data is stored in the recording device. To the time of the digital outputs, then the management information is read, and a control means for accessing said data reading means to the CD-DA data area in which data is recorded.

  In the present invention, when digital data is supplied to a recording apparatus of another recording medium to perform digital copying, data identification information indicating whether the data in the data area is CD-DA data is output. In contrast to the multi-session playback device that reads out the management information after the second session and outputs the data identification information to an external device, in the present invention, the CD-DA data is recorded in the data area. In the case of the recorded recording medium, after the management information recorded in the lead-in area is read out, the data reading means is made to access the data area in which the CD-DA data is recorded. Even a multi-session recording medium having CD-DA data and ROM data is digitally connected. Data identification information outputted last in recording device can be assumed to always show the CD-DA data.

  Further, the control means can cause the data reading means to access the data area in which the CD-DA data is recorded when the data identification information read last from the lead-in area indicates ROM data. For example, even in the case of a multi-session disc in which ROM data is recorded after the second session, data identification information indicating that it is finally CD-DA data as management information read processing is stored in the recording device. Can be output.

  Furthermore, the recording medium to be reproduced has a plurality of sessions each composed of a lead-in area and a lead-out area, and a data area in which data provided between the lead-in area and the lead-out area is recorded. A multi-session disc, or a lead-in area and a lead-out area, and a data area between which data is recorded. The data area includes a CD-DA track on which CD-DA data is recorded and ROM data. Can be a mixed mode disk having a ROM track on which are recorded.

  Further, the recording apparatus includes the recording apparatus, and the recording apparatus can digitally record the digitally output CD-DA data on a magneto-optical disk, for example, a CD player and a mini disk corresponding to a multi-session recording medium. In the case of a combined device with a recording / reproducing apparatus for recording / reproducing on MD (registered trademark), data identification information indicating CD-DA data can be output to a recording apparatus connected to the digital output means of the reproducing unit. In the case of CD-DA data for which digital copying is permitted for one generation, the recording apparatus can permit digital copying.

  Further, the recording device can be an external device for digitally recording the digitally output CD-DA data on a magneto-optical disk, and an external device digitally connected to the digital output means of the reproducing device by an optical digital cable or the like. Data identification information indicating that the data is finally CD-DA data can be output to the recording device, and digital copying of the CD-DA data can be permitted by a recording device digitally connected to the outside.

  An information processing method according to the present invention is an information processing method of an information processing apparatus capable of digitally copying and digitally copying CD-DA data to a digitally connected recording apparatus. A data reading step for reading the management information by a data reading means from a recording medium to be reproduced provided with one or more lead-in areas in which management information for managing the data area is recorded, and reading by the data reading step The identification information output step of outputting to the recording device data identification information indicating whether or not the data recorded in the data area of the management information is CD-DA data; and the data of the recording medium to be reproduced When CD-DA data is recorded in the area, the CD-DA data is digitized on the recording device. When Le output, after which the management information is read, and a control step of accessing the data area in which the CD-DA data is recorded the data reading means.

  In the information processing method of the present invention, in a reproducing apparatus capable of reproducing a multi-session recording medium and a recording apparatus digitally connected externally or internally to its digital output, data identification information is transmitted from the reproducing apparatus to the recording apparatus. When outputting, after the management information is read by the data reading means, the data reading means outputs to the data identification information obtained last, that is, the recording device in order to access the data area in which the CD-DA data is recorded. The latest data identification information can always indicate the CD-DA data, and the reproducing apparatus can be used for digital output of the CD-DA data and digital copying by the recording apparatus.

  According to the present invention, an external recording device digitally connected to a multi-session compatible information processing device for the purpose of digital copying or a recording medium to be reproduced with respect to a recording device built in the information processing device and digitally connected When CD-DA data is recorded in the data area, data identification information is output before the CD-DA data is digitally output to the recording device. At this time, after reading the lead-in area and outputting the data identification information, the data reading means is accessed to the data area in which the CD-DA data is recorded to output the data identification information. The identification information indicates the CD-DA data. With this, the CD-DA data that is originally permitted to be copied for only one generation of digital data is recorded on the recording medium to be reproduced by the recording device. Therefore, it is possible to avoid displaying a warning that the CD-DA data cannot be copied in the recording apparatus, and to digitally output the CD-DA data to the recording apparatus for digital copying.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. In this embodiment, the present invention is a playback device capable of playing back a multi-session disc, and digitally outputs CD-DA data to a recording device digitally connected to the playback device, and digitally records it on another recording medium. The present invention is applied to a reproducing apparatus for preventing problems that occur when the recording is performed.

  Specifically, for example, when copying the audio track of the 1st session recorded on a multi-session disc medium including a CD-DA for the first session and a ROM session for the second and subsequent sessions to other digital media, By manipulating the output of control bit information from the 1st session (CD section), the ROM data duplication impossible error state is prevented from occurring.

  The playback apparatus in this embodiment is compatible with multi-session disc playback of disc media having a TOC area. Prior to the description of a multi-session disc, first, a CD-DA format single session disc will be described. .

FIG. 1 is a schematic diagram showing a single session disc on which normal CD-DA data is recorded. As shown in FIG. 1, the disk D ₁ is the state in which the data area (program area) PA of CD-DA data is recorded is closed by the lead-in (LEAD IN) area LI and the lead-out (LEAD OUT) area LO Therefore, it becomes a unit called Session S. The session S has a plurality of tracks (Tracks), for example, tracks Tr ₁ to Tr ₄ .

A session in which a plurality of units called session S are continuously written on one disc is called a multi-session. FIG. 2 is a schematic diagram showing a multi-session disc format. As shown in FIG. 2, the disk D ₂ has a session S ₁ , a session S ₂ , and a session S ₃ from the innermost circumference side of the disk, and each of the sessions S _{1 to} S ₃ includes each of them. Lead-in areas LI _{1 to} LI ₃ and LO _{1 to} LO ₃ are provided on the peripheral side and the outer peripheral side, and the program areas PA are respectively arranged between the lead-in areas LI _{1 to} LI ₃ and the lead-out areas LO _{1 to} LO _3. It has a _{1 ~PA 3.}

Here, as described above, in the case of multi-session as shown in FIG. 2, for example, when ROM data is recorded in the program area PA ₃ , from a playback device corresponding to multi-session, for example, once Outputs digital data that is permitted to be copied to other devices, and when other devices attempt to record (dubbing) this digital data, the other device will display a non-duplicate warning and There is a case.

  The non-duplicate state is an error that occurs when attempting to record data that is originally violated by duplication. However, depending on the data structure of the disk that performs TOC reading, even a CD-DA format sound source recorded on the inner circumference side of the disk, that is, data that is originally permitted to be copied (RECORDING) It becomes impossible to copy. In the present embodiment, the reproduction apparatus can prevent a phenomenon that even digital data that is originally permitted to be copied cannot be digitally copied. In the case of analog recording of CD-DA data, management information indicating whether the disc is in the CD-DA format or the ROM format is not transmitted, and the copy disable warning state does not occur.

  The playback apparatus in the present embodiment will be described by taking as an example the case of playing back the multi-session disc shown in FIG. The above-described non-duplicate state is a problem that has conventionally occurred due to the TOC read processing of a multi-session disc in a multi-session playback device. In the present embodiment, when a multi-session is played back, This problem is avoided by controlling the output of the control bit in the TOC read process.

As shown in FIG. 3, the disc _{D 3} is the inner circumferential side of the 1st session _{S 1} is CD-DA format, and a recorded 2nd session _{S 2} the CD-ROM format than this on the outer peripheral side This is a multi-session disc. The disc _{D 3} is intended to be referred to as CD-EXTRA in CD standards, there are many that employ CD-EXTRA structure in protection technology of a number of copy control CD.

  First, such a multi-session type recording medium in which data having a different format is recorded in the program area, for example, a CD-DA format in which data in the CD-DA format is recorded in the first session and data in the ROM format is recorded in the second session is shown in FIG. A reproducing apparatus capable of reproducing EXTRA will be described. Although a playback apparatus that plays back an optical disk will be described here, it goes without saying that the same technique can be adopted in a playback apparatus that can play back a DVD (Digital Versatile Disc) or the like.

  FIG. 4 is a block diagram showing a playback apparatus capable of playing a multi-session disc. This playback apparatus uses audio data (linear PCM) in the same format as an existing CD recorded in the 1st session (first session) and compression such as MP3 recorded in the 2nd session (second session). This is a playback device capable of playing back audio data.

As shown in FIG. 4, the reproducing apparatus 10 includes, for example, a spindle motor 11 that rotationally drives the disk D ₃ shown in FIG. 3 and an optical pickup 12 that reproduces a signal recorded on the disk D _3. The pickup 12 includes a semiconductor laser that irradiates the disk D ₃ with laser light, an optical system such as an objective lens, a detector that receives return light from the disk D ₃ , a focus and tracking mechanism, and the like. Further, the optical pickup 12 is sent in the radial direction of the disk D ₃ by the thread mechanism 14.

An output signal from, for example, a quadrant detector of the optical pickup 12 is supplied to the RF amplifier 13. The RF amplifier 13 generates a reproduction (RF) signal, a focus error signal, and a tracking error signal by calculating an output signal of each detector of the four-divided detector. The reproduction signal is supplied to the selector 15, the lead-in data read from the lead-in area LI ₁ is supplied to the lead-in data extraction unit 16, and the focus error signal and tracking error signal are supplied to the servo circuit 17. The servo circuit 17 controls the rotation operation of the spindle motor 11 based on the reproduction clock of the RF signal, and controls the focus servo and tracking servo of the optical pickup 12.

The lead-in data extraction unit 16 decodes the lead-in data (TOC data) from the lead-in area LI ₁ and supplies the decoded data to the CPU 18. The CPU 18 stores the decrypted TOC data in the TOC memory 21. The CPU 18 has a function as a system controller that controls the operation of the entire playback apparatus. Further, an operation unit 19 and a display unit 20 are provided in association with the CPU 18. The operation unit 19 is provided with an operation unit 19 for designating reproduction of the 1st session / 2nd session and the like, together with operation keys similar to those of a normal CD reproduction apparatus. Further, the servo circuit 17 is controlled by the CPU 18 so that the operation of the reproducing apparatus and the access operation to the disk 1 are controlled. Further, the CPU 18 generates information to be displayed on the display unit 20 based on the subcode information.

The selector 15 is controlled by the CPU 18 and outputs the reproduction data from the 1st session (LI ₁ , PA ₁ and LO ₁ ) to the output terminal a, and the reproduction data from the 2nd session (LI ₁ , PA ₁ and LO ₁ ). Output to output terminal b. In the non-recorded portion, the terminal c is selected. The 1st session demodulator 22 is connected to the output terminal a, and the 2nd session demodulator 26 is connected to the output terminal b.

  The 1st session demodulator 22 performs signal processing similar to CD-DA playback signal processing. That is, the EFM of the reproduction signal is demodulated, and the subcode is separated and output. The subcode is decoded by a decoder, and the decoded subcode (including address information) is supplied to the servo circuit 17 and the CPU 18. The EFM demodulated data is supplied to an error correction unit (ECC) 22. The error correction unit 23 performs error correction by CIRC. An output of the error correction unit 23 is supplied to a D / A (digital / analog) conversion unit 24, and an analog output is taken out from the D / A conversion unit 24 to an output terminal 25. Although not shown, errors that cannot be corrected by the error correction unit 23 are interpolated.

  The 2nd session demodulation unit 26 performs the same signal processing as the 1st session demodulation unit 22. The subcode (including address information) and header information output from the 2nd session demodulation unit 26 are supplied to the servo circuit 17 and the CPU 18. The EFM demodulated data is supplied to an error correction unit (ECC) 27. A CD-ROM decoder 28 is connected to the error correction unit 27. The CD-ROM decoder 28 performs a CD-ROM format decomposition process and extracts data recorded as user data. The extracted data is supplied to the compression encoding decompression unit 29 and decompressed. The output of the decompression unit 29 is supplied to the D / A conversion unit 30, and the analog output is extracted from the D / A conversion unit 30 to the output terminal 31.

Further, the accompanying information recorded in the lead-in area LI ₁ is read into the CPU 18 by the lead-in data extraction unit 16 when the disk D ₃ is loaded and stored in the TOC memory 21. Further, the CPU 18 generates a signal for controlling the selector 15 with reference to the user's designation input by the operation unit 19 and the read information. Thereby, one of the 1st session and the 2nd session can be selectively reproduced.

In the reproducing apparatus described above, when reproducing CD-DA data in the program area PA1 of the _first session, the CPU 18 controls the selector 15 so that the selector 15 selects the output terminal a. The user can listen to the CD-DA data and dubb it to another disc. Further, when performing playback of compressed audio data of the program area PA ₂ of 2nd session, as the selector 15 selects the output terminal b, CPU 18 controls the selector 15.

The digital data is reproduced from such a reproducing apparatus 10 and the data is recorded by another recording apparatus, that is, the CD-DA audio data recorded in the first session S ₁ of the disk D _{3 is} , for example, a mini disk or the like. when dubbing a disk, having a digital data generator 32 for generating an output data in which the audio data read out from the disk D ₃ in a predetermined format. The digital data generation unit 32 outputs not only audio data but also control bits indicating whether the program data is audio data or ROM data among the read TOC data to an external recording device.

Furthermore, CPU 18 of the reproducing apparatus 10 reads from the disk _{D 3,} for controlling the digital data to be output to the external recording device. These data are output to an external recording device via an output terminal (digital out) 34.

  Here, when CD-DA data is digitally output and recorded on another disk, first, the reproducing apparatus 10 transmits the control bits of the TOC data from the TOC memory 21 to an external recording apparatus via the digital output 34. Output.

The playback device 10 performs the TOC read process because the playback device 10 determines the format of the disc D ₃ loaded. The reason why the control bit is sent to the external recording device is that the external recording device determines what kind of digital data will be output from the playback device 10.

Here, in the conventional playback apparatus, only the TOC information of the 1st session S ₁ is read regardless of whether it is a single session or a multi-session. This is because even in the case of multi-session, the 1st session S ₁ is handled as recorded CD-DA data. For example, the 1st session S ₁ is ROM data, In the case of a single session or a CD-ROM, the playback device can determine that the data recorded on the loaded disc is ROM data by the control bit indicating ROM data. For example, in an audio-only playback device, in the case of ROM data, the playback output that has been D / A converted is muted. Further, in the external recording device, when it is determined that the data to be supplied is ROM data by receiving this control bit, processing for stopping recording (dubbing) has been performed.

On the other hand, unlike the conventional playback device, a composite playback device capable of playing back compressed audio such as MP3, for example, performs processing for reading out the TOC of all sessions. Therefore, if the ROM data to the 2nd session _{S 2} or later is recorded, and that also controls the bit indicating the ROM data.

  Here, in this reproducing apparatus 10, MP3 which is ROM data can be reproduced, but in an external recording apparatus capable of recording digital data from this reproducing apparatus 10, ROM data output from the reproducing apparatus 10 is recorded. It is impossible to record, that is, to copy.

  By the way, the conventional reproducing apparatus corresponding to the reproduction of the multi-session disc holds the last control bit information acquired from the disc by the TOC read and continues to output the data from the digital out 34. Therefore, for example, when ROM data is recorded in the last session, a control bit indicating that the reproduction target (duplicating source) disk is ROM data is output to an external recording device, and as a result, digital copying is performed. In an external recording device digitally connected for the purpose, it is determined that the ROM data is output from the playback device 10. As a result, in the external digital recording device on the digital recording side, the digital data from the reproducing device 10 is displayed as being incapable of recording (digital copying is not possible). In this case, the user who has connected the recording device to the playback device 10 may display “copy not possible” on the display unit or the like of the recording device, or may actually stop the recording process. However, in the case of a multi-session disc, some CD-DA data recorded in the first session can be originally digitally copied.

  Accordingly, in the present embodiment, when a multi-session disc has a session in which ROM data is recorded and a session in which CD-DA data is recorded, a control bit indicating ROM data is provided. After the normal TOC read process, the CD-DA session program area is accessed after the TOC read process so that the last acquired control bit is not output to an external recording device, and the track on which the CD-DA data is recorded is traced to the CD. Control is performed by the CPU 18 so as to read a control bit indicating DA data. Thus, as described above, even if ROM data is recorded after the 2nd session in a multi-session disc, it is possible to access the track on which the CD-DA data is recorded after the normal TOC read processing. In addition, a control bit indicating that the data is CD-DA data can be output, and when the medium on the digital recording side is placed in the recording standby state after the TOC read on the reproduction sound source side, the duplication impossible warning is not displayed. In addition, if the digital recording side is put in a recording standby state before the TOC read processing on the sound source side is completed, a copy impossible warning is temporarily displayed when the ROM format area is accessed during TOC reading. After the read process is completed, the warning is finally cancelled.

If the CD-DA data of the first session S ₁ is data that is originally permitted to be copied, digital copying may be possible if dubbing is continued as it is. However, the display of “copy not possible” causes the user who uses this to misunderstand that data that cannot be copied is illegally copied. Also, if the disc is a single session CD-ROM format disc, there is no CD-DA track, so it is impossible to access the CD-DA track, and the recording side can not normally be copied by the conventional technology. To be made.

  FIG. 5 is a block diagram showing an external recording apparatus for recording digital data supplied from the reproducing apparatus shown in FIG. Here, a rewritable magneto-optical disk recording apparatus such as a mini disk MD will be described as an example of an external recording apparatus connected to the reproducing apparatus 10.

  FIG. 5 is a block diagram showing the recording / reproducing apparatus 40 connected to the reproducing apparatus 10. This recording / reproducing apparatus 40 performs recording / reproducing of a disk cartridge 42 in which a magneto-optical disk 41 is rotatably housed, and has a system controller (CPU) 43 that controls the overall operation of this recording / generating apparatus 40. In addition, an operation unit 44 operated by a user and a display unit 45 that displays information related to the operation of the apparatus are connected to the system controller 43.

The operation unit 44 includes a push button, a dial, and the like for executing functions such as playback start, playback stop, forward or backward track jump, playback stop, playback pause, etc. for playing back the disk cartridge 42. Yes. The operation unit 44 is connected to the reproducing apparatus shown in FIG. 3 and has a dubbing button for dubbing audio data recorded on the optical disc D ₃ onto the magneto-optical disc 41 of the disc cartridge 42. When operated by the user, the operation unit 44 generates an operation signal and inputs the generated operation signal to the system controller 43.

  The display unit 45 is composed of a liquid crystal display panel or the like. When the display unit 45 is connected to the playback device 10, the playback time and the track number being played back are based on the TOC data stored in the TOC memory 21 of the playback device 10. , Titles, etc. are displayed using characters, symbols, etc.

  Further, the recording / reproducing apparatus 40 emits and reflects a light beam to the magneto-optical disk 41, a motor 46 that rotates the magneto-optical disk 41 of the disk cartridge 42, a rotation control unit 47 that controls the rotation of the motor 46, and the like. An optical pickup 48 that detects the returning light beam, an RF amplifier 49 that generates various signals such as RF signals from the output from the optical pickup 48, a driver 50 that drives the optical pickup 48, the motor 46, and the like, an optical pickup 48, and the like A servo control unit 51 for generating a servo signal, an address decoder 52 to which a groove information signal is supplied from an RF amplifier 49, an EFM / CIRC encoder / decoder 53 for performing modulation and demodulation processing, error correction encoding and decoding processing, and the like. And earthquake-resistant memory that temporarily stores data for recording and / or playback An anti-vibration memory controller 55 for controlling writing and reading of the buffer memory (RAM) 54, a compression encoder / decoder 56 for compressing / decompressing data, and a digital / analog converting section (for converting a digital signal into an analog signal) Hereinafter, simply referred to as a D / A converter) 57, an output terminal 58 for outputting recording data, a magnetic head 59 for applying a magnetic field to the magneto-optical disk 41 to record audio data, and driving of the magnetic head 59 A head driving unit 60 that performs control and a digital data input unit 62 to which digital data from an external device is input via an input terminal 61 are provided.

  The motor 46 is integrally mounted with a disk table having a built-in magnet on a drive shaft, and serves as a rotational drive unit for the magneto-optical disk 41. The disk cartridge 42 is provided with a central opening at substantially the center of the lower surface, and the disk table enters the disk cartridge 42 through the central opening, and a clamping plate attached to the center of the magneto-optical disk 41 is attached. Magnetic attraction is performed so that the magneto-optical disk 41 can be rotated integrally.

The rotation control unit 47 drives and controls the motor 46 so that the magneto-optical disk 41 rotates at a constant linear velocity or angular velocity. Further, by the rotation control unit 47, when recording the audio data recorded on the optical disc D ₃ to the magneto-optical disk 41 of the disk cartridge 42, double speed, the control of the magneto-optical disk 41 rotating at high speed such as 4X You may make it perform.

  The optical pickup 48 includes a semiconductor laser that emits a light beam, an objective lens that focuses the light beam emitted from the semiconductor laser, a photodetector that detects a return light beam reflected by the reflection film of the magneto-optical disk 41, and the like. Prepare. The light beam emitted from the semiconductor laser is focused by the objective lens and irradiated to the signal recording surface of the magneto-optical disk 41 through a substantially rectangular recording / reproducing opening provided on the front side of the lower surface of the disk cartridge 42. Is done. The return light beam reflected by the signal recording surface of the magneto-optical disk 41 is converted into an electrical signal by the photodetector, and the photodetector outputs this electrical signal to the RF amplifier 49. The objective lens is held by an objective lens driving mechanism such as a biaxial actuator, and is driven and displaced in a focusing direction parallel to the optical axis of the objective lens and a tracking direction orthogonal to the optical axis of the objective lens. The optical pickup 48 is linearly moved across the inner and outer circumferences of the magneto-optical disk 41 by a thread mechanism. Specifically, the optical pickup 48 is on the innermost peripheral side of the magneto-optical disk 41 during standby, and moves sequentially from the inner peripheral side to the outer peripheral side when sequentially reading from the inner peripheral side. Further, the optical pickup 48 is moved so that the track specified by the user can be read when a forward or backward track jump operation is performed by the user.

  The RF amplifier 49 generates an RF signal, a focusing error signal, and a tracking error signal based on an output signal from a photodetector that constitutes the optical pickup 48. The RF amplifier 49 extracts a groove information signal that is absolute position information recorded as a wobbling groove on the magneto-optical disk 41. For example, the focusing error signal is generated by an astigmatism method or the like, and the tracking error signal is generated by a three-beam method or a push-pull method. The RF amplifier 49 outputs the RF signal to the EFM / CIRC encoder / decoder 53, outputs the groove information signal to the address decoder 52, and further outputs the focusing error signal and the tracking error signal to the servo control unit 51.

  The servo control unit 51 performs focusing servo control and tracking servo control based on a focusing error signal and a tracking error signal supplied from the RF amplifier 49. Specifically, the servo control unit 51 detects an error amount from the target value in the focusing direction or the tracking direction from the focusing error signal or tracking error signal supplied from the RF amplifier 49, and the servo based on the detection result. A signal is output to the driver 50. The driver 50 outputs a driving current corresponding to the focusing servo signal and tracking servo signal to the focusing coil and tracking coil of the objective lens driving mechanism of the optical pickup 48, so that the objective lens is applied to the signal recording surface of the magneto-optical disk 41. On the other hand, driving displacement is performed in a focusing direction that is close to and away from the recording track and in a tracking direction that is orthogonal to the recording track.

  The address decoder 52 extracts address information by decoding the groove information signal supplied from the RF amplifier 49. This address information is supplied to the system controller 43 and used for various drive controls.

  The EFM / CIRC encoder / decoder 53 performs demodulation processing such as EFM (Eight to Fourteen Modulation) demodulation on the RF signal input from the RF amplifier 49 when reproducing the audio data recorded on the magneto-optical disk 41. And error correction decoding processing such as CIRC (Cross Interleave Reed-Solomon Code). When data is recorded on the magneto-optical disk 41, the data temporarily stored in the buffer memory 54 under the control of the anti-vibration memory controller 55 is subjected to error correction encoding processing such as CIRC, and EFM or the like. Modulation processing is performed and output to the head drive unit 60.

  The anti-vibration memory controller 54 controls the writing of data into and the reading of data from the buffer memory 55 such as a D-RAM (Dynamic-Random Access Memory). Specifically, the vibration proof memory controller 54 writes the data output from the EFM / CIRC encoder / decoder 53 to the buffer memory 54 when reproducing the data recorded on the magneto-optical disk 41, and thereafter Data is read in units of data, and the read data is output to the compression encoder / decoder 56. Further, when recording data on the magneto-optical disk 41, the vibration-proof memory controller 43 writes the data input from the compression encoder / decoder 56 to the buffer memory 54, and then reads and reads the data in predetermined data units. The data is output to the EFM / CIRC encoder / decoder 56.

  The compression encoder / decoder 56 compresses and decompresses audio data. Specifically, the compression encoder / decoder 56 is compressed by a method such as ATRAC (Adaptive Transform Acoustic Coding) read from the buffer memory 54 when reproducing the audio data recorded on the magneto-optical disk 41. The data is decompressed and output to the D / A converter 57.

Further, as described above, the control bits from the reproducing apparatus 10 input to the digital data input unit 62 are input to the system controller and the rotor 43. Here, the digital output 34 of the reproducing apparatus 10 and the terminal 61 of the recording / reproducing apparatus 40 are connected by an optical fiber cable or the like. Then, by the control bits from the reproducing apparatus 10, when data from the disc D ₃ could be determined to be a CD-DA data can be processed to record this. That is, when recording audio data on the magneto-optical disk 41, digital data in a predetermined format is supplied to the digital data input unit 62 via the terminal 61, and this digital data is supplied to the compression encoder / decoder 56. The compression encoder / decoder 56 compresses the digital data from the digital output 34 of the playback device 40 such as a compact disk, and outputs the compressed data to the buffer memory 54.

  The head drive unit 60 causes the magnetic head 59 to generate an external magnetic field in accordance with the recording data that has been subjected to error correction coding processing and modulation processing by the EFM / CIRC encoder / decoder 53. At this time, the head lifting mechanism brings the magnetic head 59 into contact with or close to the surface of the magneto-optical disk 41 opposite to the surface facing the optical pickup 48. The magneto-optical disk 41 is recorded with audio data or the like when a magneto-optical recording layer is irradiated with a light beam from an optical pickup 48 and heated to a temperature above the Curie temperature and a magnetic field is applied by a magnetic head 59.

Next, connect the reproduction apparatus 10 of this embodiment in the recording and reproducing apparatus 40 configured as described above, the optical disc D ₃ is inserted into the playback device 10, the recorded CD-DA data to the disc D ₃ The operation of recording, that is, dubbing, on the magneto-optical disk 41 of the recording / reproducing apparatus 40 will be described.

First, CPU 18 is the optical disc D ₃ is mounted on the disc table of the rotational driving unit, when the optical disk D ₃ detects that it has been mounted on the disk table, an optical disc D ₃ mounted on the disk table of the motor 11 at a constant linear velocity Rotate. At the same time, the CPU 18 drives the optical pickup 12. That is, the optical pickup 12 emits a light beam to the optical disc D ₃ , and the returned light beam reflected by the signal recording surface of the optical disc D ₃ is converted into an electrical signal by the photodetector, An electric signal is output to the RF amplifier 13. The RF amplifier 13 generates an RF signal and outputs it to the selector 15, generates a focusing error signal and a tracking error signal, and outputs them to the servo control unit 17. The servo control unit 17 generates a focusing servo signal based on the focusing error signal, generates a tracking servo signal based on the tracking error signal, and uses these error signals as an objective lens driving mechanism that constitutes the optical pickup 12. Output to the drive circuit. Then, the optical pickup 12 drives the objective lens driving mechanism, performs focusing control by driving and displacing the objective lens in the optical axis direction of the light beam, and drives and displaces the objective lens in a direction orthogonal to the optical axis of the light beam. Tracking control is performed.

Then, the CPU 18 first reads the TOC data recorded in the innermost circumference of the optical disc D ₃ , that is, the lead-in area LI ₁ of the 1st session S ₁ . Specifically, CPU 18 moves the optical pickup 12 to the innermost circumference of the optical disk D ₃ mounted on the disk table. Here, the optical pickup 12 emits a light beam, photoelectrically converts it by detecting the return light beam reflected by the optical disc D ₃ , and outputs it to the RF amplifier 13. Then, for example, the first session demodulator 22 extracts the subcode data from the RF signal, converts the data bits of the 14-bit recording code sequence into data bits of the 8-bit sequence, and outputs them to the CPU 18. To do. When the reading of the TOC data of the first session is completed, the CPU 18 determines whether or not the loaded optical disk D ₃ is a multi-session type optical disk D ₃ . Specifically, the CPU 18 determines whether “B0” is set in the point block POINT of the first session 3. When the “B0” pointer is set, the CPU 53 determines that it is a multi-session type. When the “B0” pointer is not set, the CPU 53 is a normal optical disc such as a single session CD-DA. It is determined that other processing is continued.

As described above, the TOC read process of a multi-session disc _{D 3,} unless access to the 2nd session S2, if there is no way of knowing whether the session is a CD-ROM format, actually accessed to CD-ROM When the format area is known, the ROM data flows from the digital output 34, so that it is impossible to prevent the digitally connected recording media from becoming incapable of copying.

  Therefore, in the present embodiment, the TOC read process is executed by the following method to control the output of the control bit to prevent the external recording apparatus from being in a non-copyable state. FIG. 6 is a flowchart showing the TOC read processing procedure of the present embodiment.

As shown in FIG. 6, first, the TOC of the lead-in area LI ₁ of the 1st session S _{1 at} the innermost circumference of the disk is read (step S1). In order to read the lead-in area of all sessions, the multi-session disc-compatible playback device 10 reads the TOC by accessing the lead-in areas corresponding to the number of sessions if the disc is a multi-session disc. At this time, as described above, the address block ADR of the 1st session is set to “5” indicating the multi-session type in accordance with the Orange Book standard, and in this case, B0 and C0 are recorded in the point block POINT. Therefore, it is possible to determine whether or not there is a next session (step S2). Here, when it is determined that there is a 2nd session, that is, the “B0” pointer is set and the program area of the 2nd session is set. If the start address position of PA ₂ is recorded, the lead-in area LI ₂ of the 2nd session is accessed from this address information (step S3), and the TOC is read (step S4). Then, as in step S2, it is determined whether or not there is a next session (step S5). If there is a next session, the process returns to step S3 and is repeated.

  If it is determined in step S5 that there is no next session, that is, the last session, the normal TOC read ends, but in the present embodiment, the CD-DA is loaded on the disc that is currently TOC read. It is determined whether or not there is a track and playback is performed as a CD-DA disc (step S6). Here, when there is no CD-DA track on the TOC-read disc, or even when there is a CD-DA track, for example, in a mode in which data such as MP3 is desired to be reproduced and not reproduced as a CD-DA disc. In either case, the disk is stopped as it is, and the process is terminated.

  On the other hand, if it is determined in step S6 that there is a CD-DA track and the playback mode is a CD-DA disc, it is determined whether or not the final session format is a session including a ROM track. Determination is made (step S7). If the final session is not a session including a ROM track, that is, a session including only a CD-DA track, the control bits finally output by the normal TOC read performed up to step S5 are as follows. Since this indicates that the disc is in the CD-DA format, the disc is stopped as it is and the processing is terminated.

  On the other hand, if the last session is a session including a ROM track in step S7, the CD-DA format track is accessed. The purpose of this access is to acquire CD-DA control bit information, and the purpose can be satisfied by landing on the program area of the CD-DA track. However, in order to be able to avoid a CCCD or the like in which information is intentionally manipulated, it is safe to trace for a certain period of time so that the CD-DA information can be reliably acquired. In this process, the audio data must be muted.

  The format information read last in the TOC read is output to the external device. For this reason, in the case of a disc such as a CD-EXTRA, if the conventional TOC read only process is performed, the external device connected to the playback device recognizes that the playback target disc is in ROM format and cannot be copied. Display or notification. Accordingly, the CD-DA format area (track) is accessed again at the copy source, the control bit indicating that the format is CD-DA format is read, and then the TOC read processing is terminated. In the external device in which the copy destination disk is mounted, the copy source disk is a multi-session disk, and CD-DA data is recorded in the first session and copying is permitted. In such a case, it is possible to prevent the external recording apparatus from erroneously determining that copying is impossible. Here, in the present embodiment, a sequence for reading control bits, which includes a conventional TOC read process performed in a normal reproducing apparatus and a process of accessing the CD-DA track following the end of the conventional TOC read process. These operation processes are collectively referred to as a TOC read process.

  In this way, in the CD player, when the control bit to be finally output indicates the CD-DA format, when the disc includes a ROM format session after the 2nd session, the copy destination digital media Recording apparatus 40 can recognize that the copy source disk contains CD-DA data, and the external recording apparatus 40 is supplied with data from a disk having a session in the CD-DA format. As a result, it is possible to output digital data of the CD-DA session on the innermost side of the disc that is originally permitted to be dubbed.

  Here, an object of the present invention is to enable normal dubbing of an audio track in a CD-DA format area even in a multi-session configuration disk including a ROM format if it is a reproducing apparatus that reproduces a CD-DA format area. Therefore, the ROM data area cannot be duplicated in violation of the digital copy standard.

  If all of them are in the ROM format, the CD-DA format cannot be accessed in step S6, so that a control bit indicating the ROM format is output and, as usual, an external device displays a non-copyable display or Notification is made and duplication is prohibited.

  In the description of FIG. 6, when the playback apparatus is in the mode of playing a CD-DA track using the disk read TOC in step S6 as a CD-DA disk, step S7 is skipped and the process of step S8 is performed. It may be. That is, in the mode for reproducing the CD-DA track, if the CD-DA format track is accessed after the TOC read is completed, the final session is in the ROM format or the CD-DA format. Thus, it is possible to make a recording device digitally connected for the purpose of digitally copying digital data to a copy destination disc recognize that CD-DA data is recorded on the copy source disc.

  Further, when the first session is confirmed to be in the CD-DA format in step S1, the disc to be digitally copied is recorded on the recording device side by the interface such as serial communication before accessing the 2nd session. By notifying that the DA data is recorded on the disc, it is possible to avoid temporarily displaying that copying is impossible.

  Here, subcodes recorded on a CD (compact disc) will be described in detail. As is well known in the CD system, the minimum unit of data to be recorded is one frame, and one block is composed of 98 frames. As described above, the structure of one frame is as shown in FIG. 10, that is, one frame is composed of 588 bits, the head 24 bits are the synchronization data, and the subsequent 14 bits are the subcode data area. After that, data and parity are arranged.

  This block is composed of 98 frames to form one block, and the subcode data extracted from the 98 frames is collected to form one block of subcode data as shown in FIG. The subcode data from the first and second frames (frame 98n + 1, frame 98n + 2) at the head of the 98 frames is a synchronization pattern. Then, in the third frame to the 98th frame (frames 98n + 3 to 98n + 98), 96-bit channel data, that is, P, Q, R, S, T, U, V, and W subcode data are formed. .

Among these, the P channel and the Q channel are used for access management. However, the P channel only shows a pause portion between tracks, and finer control is performed by the Q channel (Q _{1 to} Q ₉₆ ). The 96-bit Q channel data is configured as shown in FIG. FIG. 12 shows Q channel data recorded in the lead-in area.

First, 4 bits of Q _{1 to} Q ₄ are used as control data CTL and are used for the number of audio channels, emphasis, CD-ROM identification, and the like. That is, 4-bit control data is defined as follows.
“0 ***”: 2-channel audio “1 ***”: 4-channel audio “* 0 ***”: CD-DA (CD digital audio)
“* 1 **”: CD-ROM
“*** 0”: Digital copy not possible “** 1 *”: Digital copy allowed “*** 0”: No pre-emphasis “*** 1”: Pre-emphasis is also available. When “** 0 *” and “** 1 *” alternate, this indicates a track that has been copied one or more generations from the copyright protection track, thereby restricting, for example, two or more generations of copying. it can.

  This control bit is supplied to the recording / reproducing apparatus, and thereby, the recording / reproducing apparatus determines whether the data is CD-DA data or whether digital copying is permitted. In the case of a commercially available CD, the third bit is recorded without being inverted and fixed to “** 0 *” which means that digital copying is prohibited. In addition, the inversion cycle when the third bit is inverted once digitally copied is defined as 9.75 Hz in the Orange Book in which the CD-R / RW standard is defined. On the recording device side, if this third bit is inverted at a period equivalent to the standard, recording is impossible as a disk once digitally copied, and from a CD to an MD if it is a copyright protection disk such as a commercially available CD. In order to enable digital copying, only one generation of digital copying is permitted, and recording is performed so that copying to the next generation is not possible.

Next 4 bits of _Q 5 to Q ₈ are an address ADR, which is a control bit data _Q 9 _{to Q 80.} When the 4 bits of the address are “0001”, it indicates that the subsequent sub Q data of Q _{9 to} Q ₈₀ is Q data for the audio CD. Q _{9 to} Q ₈₀ are 72-bit sub-Q data, and the remaining Q _{81 to} Q ₉₆ are CRC.

The information shown in FIG. 12 is recorded in 72 bits of Q _{9 to} Q ₈₀ as subcode contents, each of 8 bits. First, a track number (TNO) is recorded. That is, each track # 1 to #n takes any value from “01” to “99”. In the lead-out area, the track number is “AA”. Subsequently, information that can further subdivide each track is recorded as an index (INDEX).

  MIN (minute), SEC (second), and FRAME (frame number) are shown as absolute time addresses in the track, and PMIN (minute), PSEC (second), and PFRAME (frame number) are recorded. . The absolute time address is time information that is set to 0 minute 0 second 0 frame at the start point of the first track and is continuously assigned until the lead-out. That is, this is absolute address information for managing each track on the disc.

Next, a method for recording copy-permitted CD-DA data on another disc from a multi-session disc different from the format shown in FIG. 3 will be described. here,
1st session S1: CD-DA format 2nd session S2: CD-DA format 3rd session S3: CD-ROM format 4th session S4: Multi-session disc composed of 4 sessions of CD-ROM format 1st session S ₁ and the reproducing apparatus for only the reproduction range CD-DA format session 2nd session _{S 2} will be described.

According to the process shown in FIG. 6, first, the TOC read processing 1st Session _{S 1} at step S1. In step S2, since the next session, that is, the 2nd session exists, the 2nd session is accessed according to step S3, and the TOC read in step S4 is started. And it is confirmed whether it is the last session of step S5, and step S3-step S5 are repeated. In this way, when the TOC read is performed from the 1st session, when the TOC read of the 4th session is completed, it is determined that the session is the final session in step S5. In step S6, the CD-DA track exists and the CD- It is determined whether or not playback is desired as a DA disc. As described above, when the 1st and 2nd sessions are in the CD-DA format and are in the mode of reproducing as a CD-DA disc, the process proceeds to step S7. Since the 4th session is in the ROM format, the process proceeds to step S8, the CD-DA track of the 1st session or 2nd session is accessed, and the disc is stopped.

Further, for example, consist of two sessions, such as a disk _{D 3} shown in FIG. 2, 1st session CD-DA format, in multi-session disc configuration 2nd session is composed of MP3 format, preferentially the MP3 format session side Next, it will be described that there is no problem even if the present invention is applied to a reproducing apparatus for reproducing. Even in an MP3-compatible playback device, when data is played back from a disc on which two formats, CD-DA and MP3, are recorded, for example, a user or the like is given priority to play back one of the formats. Indicated by In the playback device, even if MP3 data can be played back or copied as analog data, it cannot be output as a digital data to another disk and copied.

The MP3 format is compressed audio data and is determined as a ROM format as computer data. Here, in the case where the reproduction apparatus so as to reproduce the MP3 is ROM data preferentially, by applying the present invention, since 1st session _{S 1} is a CD-DA format, the 2nd session _{S 2} after TOC read In step S6 shown in FIG. 6, it is determined whether the playback mode is a CD-DA disc playback mode or MP3 playback mode. If MP3 is prioritized, the TOC read is terminated as usual. In the copy destination recording apparatus, the copy of the disk having the copy source CD-DA data and MP3 data is prohibited.

  In addition, as a deliberate or defective program, such as a disc in which the TOC information is recorded as CD-DA even though the program area is ROM data, the CD that is the copy source in the copy destination recording device at the time of the TOC read process. -Even if there is a case where copying of a disk having DA data and MP3 data is not prohibited, in order to reproduce an MP3 file, a file analysis process must be performed following the TOC read process. At the time of file analysis processing, it is necessary to transmit ROM data to the MP3 decoder. Therefore, at this time, ROM data information is supplied to the CPU 18 and is transmitted to the recording device 40 of the copy destination digital media via the digital output 34, thereby enabling the copy prohibited state.

  That is, a control bit relating to each track is supplied by the channel Q of the program area, whereby a disc in which the TOC information is recorded as CD-DA although the program area is ROM data intentionally or as a defect. However, it is possible to prevent the ROM data from being copied to the digital recording destination medium without being influenced by it.

Thus, in the mode in which MP3 data is prioritized, MP3 duplication is not permitted. Further, in the mode in which the CD-DA data is played back with priority, as described above, the track of the 1st session S _{1 in} the CD-DA format is accessed, the control bits are read out, and output to an external recording device. The CD-DA data can be digitally output and digitally copied to another medium by an external recording device.

  As described above, in the present embodiment, even if the MP3 side is mounted on a playback apparatus that can play back preferentially, there is no problem that the copy is permitted, and neither the CD-DA format nor the MP3 format is used. The same effect can be obtained in a playback apparatus that selects and plays back.

  Next, as another example of the information processing apparatus according to the present embodiment, a reproducing apparatus that reproduces CD-DA data and a recording that can record the CD-DA data from the reproducing apparatus on a magneto-optical disk such as a mini-disc. An information processing apparatus as a recording / reproducing apparatus equipped with a reproducing apparatus will be described. FIG. 7 is a block diagram showing a recording / reproducing apparatus as another example of the information processing apparatus according to the present embodiment. In the recording / reproducing apparatus as the information processing apparatus shown in FIG. 7, the same components as those of the reproducing apparatus and the recording apparatus shown in FIGS. 4 and 5 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 7, a recording / reproducing apparatus 70 includes a reproducing unit 71 for reproducing a compact disc to which the present invention is applied, and a recording / reproducing unit 72 for recording / reproducing a disk cartridge 42 in which a magneto-optical disk 41 is rotatably housed. And a system controller 73 for controlling the overall operation.

  In addition, the recording / reproducing apparatus 70 includes an operation unit 74 that is operated by a user to play or stop a compact disc or a magneto-optical disc, and a display unit 75 that displays information related to the operation of the device.

Operation unit 74, the playback start for reproducing the optical disc D ₃ and the disk cartridge 42, reproduction stop, forward or reverse track jump, play stop, push buttons for performing functions such as reproduction pause, dial, etc. It consists of The operation unit 74 has a dubbing button for dubbing audio data recorded on the optical disc D3 onto the magneto-optical disc 41 of the disc cartridge 42. When operated by the user, the operation unit 74 generates an operation signal and inputs the generated operation signal to a system controller (CPU) 73.

  The display unit 75 is composed of a liquid crystal display panel or the like, and displays the reproduction time, the track number being reproduced, the title, etc. using characters, symbols, etc. based on the TOC data stored in the TOC memory 21. .

  When the dubbing button of the operation unit 74 is pressed, the playback unit 71 reads the TOC of the optical disc and stores it in the TOC memory 21. At this time, for example, when the disc is a multi-session disc having a session in the CD-DA format and the ROM format, and the final session is in the ROM format, the CPU 73 accesses the track in the CD-DA format, A control bit indicating that the data is CD-DA data is read out. The control bit read last, that is, the control bit indicating the CD-DA data is output to the digital data input unit 78 via the digital data generation unit 76.

  By sending control bits from the digital data generation unit 76 of the reproduction unit 71 to the CPU 73 via the digital data input unit 78 to the recording / reproduction unit 72, the CPU 73 is CD-DA data. Whether the data is ROM data or not is discriminated. If the data is CD-DA data, recording permission is displayed on the display unit 75.

  Here, as described above, the digital data generation unit 76 in the present embodiment is a multi-session disc composed of two sessions, for example, and ROM data is recorded in the 2nd session. Since the control bit finally supplied to the recording / reproducing unit 72 indicates that the data is CD-DA data, the recording / reproducing unit 72 determines that the supplied data is CD-DA data. In addition, it is possible to prevent the display indicating that recording is not possible.

  In the present embodiment, the CD-EXTRA disc or the CD of the multi-session disc including the ROM session after the 1st session is in the CD-DA format or the 2nd session in a playback device that supports playback of the multi-session disc. -When copying the DA format area to other digital media, access the CD-DA format session after the normal TOC read process is completed, and read the control bit indicating the CD-DA data recorded in the program area In this way, the recording device which is going to make a digital copy recognizes that the copy source disc is a disc having the CD-DA format, and the recording device is originally allowed to make only one generation of digital copy. CD It is possible to replicate the normal audio track without causing the state to alert the recording not the DA data.

  Also, depending on the playback device, even if the recording disabled warning state occurs, it is possible to return to the recording ready state by forcibly accessing the audio track of the CD. Dubbing to other discs is permitted, but the user may be confused by issuing a warning that recording is not possible. This is because the conventional CD playback device does not read the TOC after the 2nd session even if the disc is a multi-session, whereas the MP3-compatible playback device, for example, supports the multi-session. Therefore, the TOC after the 2nd session is also read.

  That is, in a playback device that can play back not only CD-DA data but also MP3 data, the TOC after the 2nd session may be read out. When performing digital output to such a recording apparatus, control bit information indicating ROM data is also transmitted. Thereby, in an external recording device (or a built-in recording device) connected for the purpose of digitally copying CD-DA data, when data (control bit) indicating ROM data is input, Recording prohibition is displayed (duplication not possible warning). Therefore, even when attempting to digitally record CD-DA data that is originally permitted to be copied, the user may misunderstand that copying cannot be performed, or the copying is prohibited or the copying cannot be stopped by looking at the display indicating that copying cannot be performed. The user was confused that it was possible to duplicate it even though it was displayed.

  On the other hand, when the digital data of the disc that is allowed to be digitally copied is digitally copied as in this embodiment, the program area in which the CD-DA data is recorded is traced at the end of the TOC read process. By doing so, the duplication impossible warning display is canceled when duplication is possible, and confusion of the user can be prevented.

  Note that if the recording device is placed in a recording standby state before the TOC read processing of the disc is completed on the playback side, a duplication impossible warning will be temporarily displayed, but in order to further prevent user confusion, The fact that such display is made because an area that cannot be copied is being accessed may be described in the instruction manual of the apparatus.

  Furthermore, by controlling the data (control bit information) output from the playback device side, for example, even if the recording device is a product of another company, the above-mentioned problems can be avoided without changing the recording device. can do.

  It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. In the above-described embodiment, the description has been given of the apparatus and method for avoiding the non-copying of CD-DA data that is a multi-session disc and is originally permitted to copy digitally only for one generation. In the session disc, a disc having a different format for each track, for example, defined as a mixed mode in the red book and yellow book, ROM data is recorded on the first track, and CD-DA data is recorded on the second to fourth tracks. This is an effective method even for a disk having a configured structure. In that case, in the TOC read process, when the track start time information of 2 to 4 tracks is finally read and the TOC read process is completed, the above-mentioned copy-disabled state is not obtained, but the track start time information of one track is When the last read and the TOC read process are completed, the data that is finally output from the playback device becomes ROM information, and the same problem as described above occurs. Therefore, in the case of a mixed mode disc, after the normal TOC read processing up to step S5 shown in FIG. 6, similarly, it is determined whether or not a CD-DA track exists and is reproduced as a CD-DA disc. If the last read control bit indicates ROM data, the original data is copied by accessing the track on which the CD-DA data is recorded, reading the control bit, and ending the series of processing. It is possible to permit digital copying of CD-DA data that is not impossible.

  In this way, when a recording device (recording device) for digital recording is digitally connected to a playback device capable of playing back a multi-session disc outside or inside the playback device, the playback device When a multi-session or mixed mode disc containing CD-DA data that is permitted to be copied is played, digital data is output, and when this is digitally copied by the recording device, a warning that digital recording is not possible at this recording device Can be prevented.

  Specifically, when the recording apparatus is placed in a recording standby state after the series of processes shown in FIG. 6, no indication indicating that copying cannot be performed is displayed on the recording apparatus. Further, if the recording apparatus is put in a recording standby state before or during the series of processing in FIG. 6 and there is a session including a ROM track in step S7, the disk is in ROM format only at that time. In order to access the CD-DA format track in step S8 as described above, the information indicating that the recording device is supplied to the recording device. Immediately, the display indicating that copying is not possible is canceled. Further, as described above, when the 1st session is in the CD-DA format, if the recording device side is notified to the recording device side through a predetermined interface before accessing the 2nd session, the CD-DA disc is temporarily stored. It is also possible to avoid the display of non-replicatable display.

  As described above, even when a disc to be played back as a CD-DA includes a ROM track, it is finally possible to record by accessing the track in the CD-DA format after the normal TOC read process. Therefore, the confusion of the user can be minimized.

It is a schematic diagram which shows the disk of the single session in which normal CD-DA data is recorded. It is a schematic diagram which shows the disk format of a multi session. It is a schematic diagram showing a multi-session disc in which CD-DA data and CD-ROM data are recorded in a 1st session and a 2nd session, respectively. FIG. 2 is a diagram showing a playback device in an embodiment of the present invention, and is a block diagram showing a playback device capable of playing back the multi-session disc. It is a block diagram which shows the external recording device which records the digital data supplied from the said reproducing | regenerating apparatus. It is a flowchart which shows the TOC read processing method in embodiment of this invention. FIG. 10 is a block diagram showing a recording / reproducing apparatus as another example of the information processing apparatus in the embodiment of the present invention. It is a figure explaining a multi-session type compact disc. It is a figure explaining the format of a compact disc. It is a figure explaining a subcode and a frame format. It is a figure explaining a subcode. It is a figure explaining the Q channel of the subcode recorded on the lead-in area used as TOC data. FIG. 10 is a block diagram showing a playback device described in Patent Document 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Playback apparatus, 11 Spindle motor, 12 Optical pickup, 14 Thread mechanism, 13 RF amplifier, 15 Selector, 16 Lead-in data extraction part, 17 Servo circuit, 18 CPU, 19 Operation part, 20 Display part, 21 Memory for TOC, 22 1st session demodulation unit, 23 error correction unit, 24 D / A conversion unit, 25 output terminal, 26 2nd session demodulation unit, 27 error correction unit, 28 CD-ROM decoder, 29 decompression unit, 30 D / A conversion unit, 32 Digital data generation unit, 34 output terminal, 40 recording / reproducing device, 41 magneto-optical disk, 42 disk cartridge, 44 operation unit, 45 display unit, 43 system controller, 46 motor, 47 rotation control unit, 48 optical pickup, 49 RF Amplifier, 50 drivers, 51 Servo controller, 52A Les decoder, 53 encoder / decoder, 54 a buffer memory, 55 memory controller, 56 compression encoder / decoder, 57 D / A conversion unit, 58 an output terminal,
59 magnetic head, 60 head drive unit

Claims (11)

An information processing apparatus capable of digitally copying and digitally copying CD-DA data to a digitally connected recording apparatus,
A data reading means for reading the data and the management information from a recording medium to be reproduced provided with one or more lead-in areas in which a data area in which data is recorded and management information for managing the data area are recorded;
Identification information output means for outputting, to the recording device, data identification information indicating whether or not the data recorded in the data area among the management information read by the data reading means is CD-DA data;
When the CD-DA data is recorded in the data area of the recording medium to be reproduced and the CD-DA data is digitally output to the recording device, after the management information is read, An information processing apparatus comprising: control means for causing the data reading means to access a data area in which the CD-DA data is recorded. The control means makes the data reading means access the data area in which the CD-DA data is recorded when the data identification information read last from the lead-in area indicates ROM data. Item 6. The information processing apparatus according to Item 1. The information processing apparatus according to claim 1, wherein the recording medium to be reproduced has a plurality of sessions each including a lead-in area and a lead-out area, and a data area in which data is recorded therebetween. The recording medium to be reproduced includes a lead-in area and a lead-out area, and a data area in which data provided between the lead-in area and the lead-out area is recorded. The data area is a CD- The information processing apparatus according to claim 1, further comprising a CD-DA track on which DA data is recorded and a ROM track on which ROM data is recorded. Having the recording device,
The information processing apparatus according to claim 1, wherein the recording apparatus digitally records the digitally output CD-DA data on a magneto-optical disk. The information processing apparatus according to claim 1, wherein the recording apparatus is an external apparatus that digitally records the digitally output CD-DA data on a magneto-optical disk. The information processing apparatus according to claim 1, wherein the recording medium has two or more sessions, and the data areas of the sessions are recorded in different formats. In an information processing method of an information processing apparatus capable of digitally outputting and copying CD-DA data to a digitally connected recording apparatus,
A data reading step for reading the management information by a data reading means from a recording medium to be reproduced provided with one or more lead-in areas in which data area in which data is recorded and management information for managing the data area is recorded; ,
An identification information output step of outputting data identification information indicating whether or not the data recorded in the data area of the management information read out by the data reading step is CD-DA data to the recording device;
When the CD-DA data is recorded in the data area of the recording medium to be reproduced and the CD-DA data is digitally output to the recording device, after the management information is read, A control step of causing the data reading means to access a data area in which the CD-DA data is recorded. In the control step, when the data identification information last read from the lead-in area indicates ROM data, the data reading means is made to access the data area in which the CD-DA data is recorded. The information processing method according to claim 8. 9. The information processing method according to claim 8, further comprising a recording step of digitally recording the digitally output CD-DA data on the magneto-optical disk by the recording device. 9. The information according to claim 8, further comprising a data output step of digitally outputting the CD-DA data and digitally recording the CD-DA data on a magneto-optical disk by the recording apparatus digitally connected to the outside. Processing method.

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