JP2002117621A - Recording and reproducing device and method for erasing truck information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording and reproducing device which can properly erase information on data tracks from a recording medium, in which an audio track and a data track are intermingled. SOLUTION: A microcomputer 4 controls a recording/reproducing part 6 to read TOC(Table of Contents) information for managing each track from an MD 10 in which an audio track and a data track are intermingled. The microcomputer 4 discriminates the track number of the data track according to bit information in a sub-code included in read TOC information. The microcomputer 4 erases information on data tracks by making the discriminated track number blank, and closing subsequent track numbers up by 1 to re-assign numbers in TOC information. The microcomputer 4 controls the recording/ reproducing part 6 to write TOC information, in which information on data tracks is erased, into the MD 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a recording / reproducing apparatus and a track information erasing method capable of appropriately erasing data track information from a recording medium in which audio tracks and data tracks are mixed.

[0002]

2. Description of the Related Art CD (Compact Disc), MD (Mini Dis
c), CD-R (CD Recordable) and CD-RW
Various recording media such as (CD ReWritable) are used according to the purpose of the user. CD is also available as LD (La
optical disks (DAD; DigitalA)
udio disc) and are reproduced by a predetermined reproducing device (for example, an optical information reproducing device or the like). MD is M
The information is classified into a magneto-optical disk including O (Magneto-Optical) or the like, and predetermined information is recorded by a predetermined recording device (for example, a magneto-optical information recording device). CD-R is another DVD-R (Digital Versatile Disk Recordable)
Are classified as write-once optical discs,
-RW is DVD-RW (DVD ReWritable) or DV
The disc is classified as a rewritable phase-change disc including a D-RAM or the like, and predetermined information is recorded in a predetermined recording device (for example, an optical information recording device or the like). The recording device is
Generally, it is commercialized as a composite type recording / reproducing device (for example, an optical information recording / reproducing device, a magneto-optical information recording / reproducing device, etc.) capable of reproducing a recorded recording medium or the like.

[0003] Using these playback devices, recording devices, and playback / recording devices, a user performs a data storage operation such as playing back a predetermined recording medium and recording playback data on another type of recording medium. There is. Specifically, there are cases where the user plays back a CD using a playback device and records playback data on an MD using a recording device. That is, the playback device plays back data recorded on a CD or the like, and supplies the playback data to the recording device or the like via a predetermined audio cable or the like. The recording device etc.
Etc. At this time, the recording device or the like records TOC information including a track number or the like in a UTOC (User Table Of Contents) area or the like that stores management information.

[0004]

Recently, the first half has a C
D-ROM XA (CD-ROM eXtended Architecture)
A mixed mode CD having a CD-DA (CD Digital Audio) in the second half and an Audio-Combined Disc in which data tracks and audio tracks are mixed in various ways are commercially available. When storing data (tracks) of such a mixed mode CD or the like in an MD or the like, a recording device or the like often records data including a data track.
The user can use the MD on which such a data track is recorded.
Etc. may be reproduced by a reproduction device for audio reproduction. In this case, when reproducing the data track portion, the reproducing device automatically turns on mute to prevent generation of a loud noise. In other words, the playback device turns on the mute and plays back silently while playing back the data track included in the MD, and turns off the mute when the playback target moves to the audio track and plays back the audio normally.

[0005] For this reason, every time the playback device enters a silent state, the user operates an operation button or the like of the playback device to skip to an audio track and play back the audio track.
It was necessary to program-select only the audio track in advance so that the data track could be reproduced without the data track. Since such an operation is extremely complicated for the user, it has been desired to reproduce only the audio track without requiring the operation of the user.

The present invention has been made in view of the above circumstances, and provides a recording / reproducing apparatus and a track information erasing method capable of appropriately erasing information on a data track from a recording medium in which audio tracks and data tracks are mixed. The purpose is to do.

[0007]

In order to achieve the above object, a recording / reproducing apparatus according to a first aspect of the present invention stores management information for managing each track from a predetermined recording medium including a data track. Reading means for reading, identification means for identifying a data track according to the management information read by the reading means, and erasure for erasing information on the data track identified by the identification means from the management information read by the reading means And writing means for writing the management information from which the information related to the data track has been erased by the erasing means on the original recording medium.

According to the present invention, the reading means reads, for example, TOC information for managing each track from a predetermined recording medium including a data track. The identification means identifies the data track according to the TOC information read by the reading means. The erasing means includes information (such as a track number) on the data track identified by the identifying means.
From the TOC information read by the reading means. The writing means writes the TOC information from which the information on the data track has been erased by the erasing means on the original recording medium. As a result, it is possible to appropriately erase information on data tracks from a recording medium on which audio tracks and data tracks are mixed.

In order to achieve the above object, a recording / reproducing apparatus according to a second aspect of the present invention comprises a reading means for reading management information for managing each track from a predetermined recording medium on which audio tracks and data tracks are mixed. Identification means for identifying a track number of a data track according to the bit information included in the management information read by the reading means; and track number identified by the identification means in the management information read by the reading means. Means for erasing the information on the data track by blanking and then renumbering the subsequent track numbers one by one, and the management information from which the information on the data track has been erased by the erasing means on the original recording medium. And writing means for writing to

According to the present invention, the reading means reads, for example, TOC information for managing each track from a predetermined recording medium on which audio tracks and data tracks are mixed. The identification means is the TOC read by the reading means.
For example, the track number of the data track is identified according to the bit information in the subcode included in the information. The erasing unit erases the information on the data track by blanking the track number identified by the identifying unit in the TOC information read by the reading unit, packing the subsequent track numbers one by one, and renumbering the data tracks. The writing means writes the TOC information from which the information on the data track has been erased by the erasing means on the original recording medium. As a result, it is possible to appropriately erase information on data tracks from a recording medium on which audio tracks and data tracks are mixed.

In order to achieve the above object, a recording / reproducing apparatus according to a third aspect of the present invention comprises: a reading unit for reading management information for managing each track from a predetermined recording medium including a data track; Identifying means for identifying a data track according to the management information read by the reading means; erasing means for erasing information on the data track identified by the identifying means from the management information read by the reading means; And reproducing means for reproducing only the audio track from the recording medium in accordance with the management information from which the information related to the data track has been deleted.

According to the present invention, the reading means reads, for example, TOC information for managing each track from a predetermined recording medium including a data track. The identification means identifies the data track according to the TOC information read by the reading means. The erasing means erases information on the data track identified by the identifying means from the management information read by the reading means. The reproducing unit reproduces only the audio track from the recording medium according to the management information from which the information on the data track has been deleted by the erasing unit. As a result, it is possible to appropriately erase information on data tracks from a recording medium on which audio tracks and data tracks are mixed.

In order to achieve the above object, a track information erasing method according to a fourth aspect of the present invention includes a reading step of reading management information for managing each track from a predetermined recording medium including a data track; An identification step of identifying a track number of a data track according to the management information read at the reading step; and an erasing step of erasing the data track from the recording medium according to the track number identified at the identification step. It is characterized by having.

According to the present invention, the reading step reads, for example, TOC information for managing each track from the predetermined recording medium including the data track. The identification step identifies the track number of the data track according to the TOC information read in the reading step. The erasing step erases the data track from the recording medium according to the track number identified in the identifying step.
As a result, it is possible to appropriately erase information on data tracks from a recording medium on which audio tracks and data tracks are mixed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording and reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of a configuration of a recording / reproducing apparatus applied to an embodiment of the present invention.
As shown in the figure, the recording / reproducing apparatus includes a display unit 1, a key operation unit 2, a remote control receiving unit 3, a microcomputer 4, an oscillator 5, and a recording / reproducing unit 6.

The display unit 1 has an LCD (Liquid Crystal Dis
play) panel, etc., for displaying the operation status of the recording / reproducing apparatus.

The key operation unit 2 includes a plurality of push button switches and the like, and is operated by a user to input predetermined instruction information. For example, the key operation unit 2 inputs instruction information for instructing execution of a track information erasing process to be described later according to a user operation.

The remote control receiver 3 receives an infrared signal or the like transmitted from a predetermined remote controller. Remote control receiver 3
Generates predetermined instruction information in accordance with the received signal and supplies it to the microcomputer 4.

The microcomputer 4 includes a CPU 41, a ROM 42, and a RAM 43, and controls the entire recording / reproducing apparatus. The CPU (Central Processing Unit) 41
According to a program stored in the ROM 42, a track information erasing process described later is executed. ROM (Read Onl
The y memory 42 stores in advance a program for defining a track information erasing process described later.

A RAM (Random Access Memory) 43 is
Work data and the like used in track information erasing processing and the like described later are stored. Specifically, the RAM 43 stores Media_Tmp_TC_Min, Media_Tmp_TC_Max,
Data such as dia_Cnt_TC_Min and Media_Data_TC_Dno are stored.

Media_Tmp_TC_Mi stored in RAM 43
n and Media_Tmp_TC_Max are information indicating the minimum and maximum track numbers recorded on the MD 10.
Media_Cnt_TC_Min is used to determine the data track.
This is information for indicating a track number.

Media_Data_TC_Dno is information indicating a track number which is a data track existing in the MD 10. Note that when there are a plurality of data tracks, a plurality of track numbers are stored in Media_Data_TC_Dno.

The oscillator 5 is composed of a crystal oscillator or the like, generates a signal of a predetermined frequency, and supplies the signal to the microcomputer 4.

The recording / reproducing unit 6 includes, for example, a drive unit for rotatingly driving the MD 10, a pickup for reading recorded data by irradiating the MD 10 with a laser beam, and magnetizing a portion of the MD 10 irradiated with the laser beam. The magnetic head includes a signal processing unit that performs signal processing on data to be written by the magnetic head.

The recording / reproducing unit 6 records M
D10 has a structure as shown in FIG.
Data is recorded with an image as shown in FIG. FIG. 3C is a diagram showing a recording image of the reproduction-only MD 10.

The recording / reproducing unit 6 is controlled by the microcomputer 4, identifies the track number of the data track from the MD 10 having such a structure, and erases the track number of the identified data track. Specifically, the recording / reproducing unit 6
In the TOC information, the track number of the data track is blanked, the subsequent track numbers are packed by one, and the numbers are renumbered, thereby deleting the information on the corresponding data track.

The operation of the recording / reproducing apparatus according to this embodiment will be described below with reference to FIGS. FIG.
FIG. 5 is a flowchart for explaining the track information erasing process. The track information erasing process is started, for example, when predetermined instruction information is input from the key operation unit 2 or the like.

First, as shown in FIG. 4, the microcomputer 4
The recording / reproducing unit 6 is controlled to load the MD 10 (Step S21). That is, the recording and reproducing unit 6
10 is loaded into a recordable state.

The microcomputer 4 controls the recording / reproducing unit 6 to control M
Read TOC information from TOC of D10 (step S
22). That is, the recording / reproducing unit 6 reads the TOC information recorded in the TOC (Lead in) shown in FIG. 3A and the like, and supplies the read TOC information to the microcomputer 4.

The microcomputer 4 determines whether the TOC information has been read (step S23). That is, the microcomputer 4 determines whether the TOC information has been recorded in the TOC of the MD 10. When the microcomputer 4 determines that the TOC information has been read, the microcomputer 4 proceeds to step S34 described below.

On the other hand, if the microcomputer 4 determines that the TOC information cannot be read, the microcomputer 4 controls the recording / reproducing unit 6 to operate the MD 1
The TOC information is read from the UTOC of 0 (step S2)
4).

The microcomputer 4 determines whether the TOC information has been read (step S25). That is, the microcomputer 4 determines whether the TOC information has been recorded in the UTOC of the MD 10. When the TOC information is not recorded in the UTOC, the microcomputer 4 determines that the MD 10 is a blank medium. If the microcomputer 4 determines that the TOC information cannot be read (is a blank medium), the process proceeds to step S34 described below.

On the other hand, when it is determined that the TOC information has been read, the microcomputer 4 calculates the TOC information according to the read TOC information.
Media_Tmp_TC_Min and Media_Tmp_TC_Max in RAM 43
Is set to (step S26). That is, the microcomputer 4 sets the minimum track number recorded on the MD 10 in Media_Tmp_TC_Min according to the TOC information, and sets the maximum track number in Media_Tmp_TC_Max.

The microcomputer 4 is provided with Media_Cnt_TC_Min
Then, the value of Media_Tmp_TC_Min is set as an initial value (step S27).

Proceeding to FIG. 5, the microcomputer 4 executes the Media_Cnt_
A subcode corresponding to the track number indicated by TC_Min is obtained (Step S28). That is, the microcomputer 4
Acquires a subcode including the Q channel data of the track number indicated by Media_Cnt_TC_Min.

The microcomputer 4 determines whether or not the target track is a data track according to the obtained subcode (step S29). That is, the microcomputer 4 determines whether or not the target track is a data track based on the value of the second bit at the head in the Q channel data. Specifically, when the value of the second bit of the Q channel data is “1”, the microcomputer 4 determines that the track is a data track, and when the value is “0”, it determines that the track is an audio track. If the microcomputer 4 determines that the track is not a data track (is an audio track), the microcomputer 4 proceeds to step S31 described below.

On the other hand, when determining that the track is a data track, the microcomputer 4 registers a track number in Media_Data_TC_Dno (step S30). That is, the microcomputer 4
Is the track number indicated in Media_Cnt_TC_Min
43 in addition to and stored in Media_Data_TC_Dno.

The microcomputer 4 determines that the value of Media_Data_TC_Dno is M
It is determined whether it is equal to the value of edia_Tmp_TC_Max (step S31). That is, the microcomputer 4 determines whether or not data tracks have been determined for all tracks.

The microcomputer 4 has Media_Data_TC_Dno and Media_Data_TC_Dno
If it is determined that the value of _Tmp_TC_Max is not equal,
One is added to the value of _Data_TC_Dno (step S32), and the process returns to step S28. That is, the microcomputer 4
Until the value of Media_Data_TC_Dno is equal to the value of Media_Tmp_TC_Max, the processes of steps S28 to S32 are repeatedly executed.

On the other hand, in step S31, Media_Data_T
If it is determined that the value of C_Dno is equal to the value of Media_Tmp_TC_Max, the microcomputer 4 determines the UTO according to Media_Data_TC_Dno.
The information on the data track is recorded from C (step S33). That is, the microcomputer 4 erases the information related to the data track by blanking out the track number indicating the data track registered in Media_Data_TC_Dno in the TOC information, filling in subsequent track numbers one by one, and renumbering. Then, the TOC information from which information on the data track has been deleted is recorded in the UTOC.
When the microcomputer 4 records the TOC information in which the information related to the data track has been deleted in the UTOC of the MD 10, the microcomputer 4 ends the track information erasing process.

In step S23 shown in FIG.
If it is determined that the TOC information exists in the OC, or if it is determined in step S25 that the TOC information does not exist in the UTOC, the microcomputer 4 displays a predetermined error message on the display unit 1 (step S34). After displaying the error message, the microcomputer 4 ends the track information erasing process.

As described above, the track information erasing process determines whether the track recorded on the MD 10 is a data track. When the data track is determined, the information on the data track is deleted from the UTOC that is the management information. When reproducing the MD 10 from which the information on the data track has been deleted in this way, the recording / reproducing apparatus reproduces only the audio track.

As a result, information on data tracks can be properly erased from a recording medium on which audio tracks and data tracks are mixed.

In the above embodiment, the recording / reproducing apparatus for erasing information related to the data track from the MD 10 has been described. However, the recording medium from which the recording / reproducing apparatus erases information is arbitrary. For example, the recording / reproducing apparatus may delete information on a data track from a CD-RW or the like as a recording medium from which information is deleted.

The present invention is not limited to the above-described recording medium such as a disk, but can be appropriately applied to erasing data tracks from a solid-state memory such as a smart media (trademark) and a memory stick (trademark).

In the above-described embodiment, a case has been described where information relating to a data track is erased from a recording medium on which information can be erased (rewritable).
The information on the data track may be deleted from the TOC information read into the audio track so that only the audio track can be reproduced.

More specifically, the microcomputer 4 is configured as shown in FIG.
MD10 dedicated to reproduction of a recorded image as shown in FIG.
Is loaded, MD10 TOC to TOC
The information is read into the RAM 43. The microcomputer 4 acquires the subcode including the Q channel data and recognizes the track number of the data track. The microcomputer 4 blanks the identified track number and erases information on the data track. Then, the microcomputer 4 controls the recording / reproducing unit 6 to reproduce only the audio track from the MD 10 according to the TOC information in the RAM 43 from which the information on the data track has been deleted.

Also, instead of erasing data track information from the TOC information read into the RAM 43,
Skip information that can skip the data track may be set in a corresponding area in the TOC information. In this case, the microcomputer 4 sets the TO
According to the C information, the recording / reproducing unit 6 can be controlled to reproduce only the audio track from the MD 10.

In the above-described embodiment, the recording medium for managing data (tracks) by track numbers has been described as an example. However, a recording medium for managing data by chapter numbers can be applied as appropriate. .

[0051]

As described above, according to the present invention,
Information about data tracks can be appropriately erased from a recording medium on which audio tracks and data tracks are mixed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of a recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of data stored in a RAM in a microcomputer.

3A is a schematic diagram for explaining the structure of an MD, FIG. 3B is a schematic diagram showing a recordable MD recording image, and FIG. 3C is a reproduction-only MD recording image; FIG.

FIG. 4 is a first half flowchart for explaining track information erasing processing according to the embodiment of the present invention;

FIG. 5 is a second half flowchart for explaining track information erasing processing according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display part 2 Key operation part 3 Remote control receiving part 4 Microcomputer 5 Oscillator 6 Recording / reproducing part 10 MD41 CPU42ROM43RAM

Claims (4)

[Claims] 1. A reading means for reading management information for managing each track from a predetermined recording medium including a data track, an identification means for identifying a data track according to the management information read by the reading means, Erasing means for erasing information related to the data track identified by the identifying means from the management information read by the reading means; and writing the management information from which the information related to the data track has been erased by the erasing means to the original recording medium. Recording / reproducing apparatus, comprising: 2. A reading means for reading management information for managing each track from a predetermined recording medium on which audio tracks and data tracks are mixed, and a data track according to bit information included in the management information read by the reading means. Identification means for identifying the track numbers of the above, and in the management information read by the reading means, the track numbers identified by the identification means are blanked, and the subsequent track numbers are packed by one and renumbered. A recording / reproducing apparatus comprising: erasing means for erasing information on a data track; and writing means for writing management information from which information on a data track has been erased by the erasing means to an original recording medium. 3. A reading means for reading management information for managing each track from a predetermined recording medium including a data track, an identification means for identifying a data track in accordance with the management information read by the reading means, Erasing means for erasing information related to the data track identified by the identifying means from the management information read by the reading means; and only the audio track from the recording medium according to the management information from which the information related to the data track has been erased by the erasing means. A recording / reproducing apparatus, comprising: reproducing means for reproducing. 4. A reading step for reading management information for managing each track from a predetermined recording medium including a data track, and according to the management information read in the reading step.
A track information erasing method, comprising: an identification step of identifying a track number of a data track; and an erasing step of erasing a data track from a recording medium according to the track number identified in the identification step.