JPH05101399A - Optical disk reproducing device - Google Patents

Abstract

PURPOSE:To write previously reproduction prohibiting information and to improve operability by prohibiting or allowing reproduction by prohibiting the reproduction of a reproduction prohibition recording information piece based on the reproduction prohibiting information at the time of reading the reproduction prohibiting information and the recording information piece and reproducing them. CONSTITUTION:When the reproduction prohibition information and the recording information piece recorded on a magneto-optical disk body 21 is read and reproduced by an optical pickup 2 and an RF amplifier 7, etc., a system controller 10 controls respective parts of the device 100 as follows. That is, based on the read reproduction prohibition information, the reproduction prohibition recording information piece is discriminated, the reproduction of the information is prohibited, other information is reproduced in a specified order and outputted from a D/A converter 16. Further, the reproduction prohibition is set or released from a key input part 18 and written by a magnetic head 3 and required index information, etc., is displayed on a display part 17. Thus, unwanted information is not displayed and specified information is displayed freely and the operability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing apparatus, and more particularly to a mini disk (hereinafter abbreviated as MD) reproducing apparatus.

[0002]

2. Description of the Related Art A compact disc (hereinafter abbreviated as a CD) has been conventionally known as an optical disc dedicated to reproduction in which acoustic information and various data are recorded, and a CD player is known as a CD reproducing device. .. There are two types of this CD, 12 cm in diameter and 8 cm in diameter, and information of up to about 74 minutes is recorded in the form of a digital signal.

On the other hand, recently, the diameter (diameter 6
An MD and MD recording / reproducing device, which is a magneto-optical disk capable of writing and rewriting information, having a reproduction time equivalent to that of a CD of 4 mm) have been developed (“Nikkei Electronics [Nikkei BP] No. 528 (1991.5) .27), 106th
Page to page 107 ", and" Radio Technology [Radio Technology Co., Ltd.] (June 1991) pages 9 to 12 ". ).
In this MD, for example, 16-bit data recorded on a CD is compressed into 4-bit data and recorded.

[0004]

Since the MD recording / reproducing apparatus is capable of erasing and recording information, the user can perform information operation (for example, writing arbitrary data). However, conventionally, all the recorded information recorded in the MD can be reproduced, and it is impossible to perform the information operation so that a part of the recorded information cannot be reproduced.

Therefore, it is an object of the present invention to provide an optical disc reproducing apparatus capable of prohibiting or permitting the reproduction of specific record information of an optical disc.

[0006]

In order to solve the above problems, the first invention is an optical disk reproducing apparatus for reproducing an optical disk having a prohibition information recording area in which reproduction prohibition information of each record information piece can be written. Reproducing means for reading and reproducing the reproduction prohibition information and the recorded information piece;
Discriminating means for discriminating whether or not reproduction is prohibited for each record information piece recorded on the optical disc based on the reproduction prohibition information, and the recording information piece of which reproduction is prohibited based on the discrimination. And a reproduction prohibiting means for prohibiting reproduction by the reproducing means.

A second aspect of the present invention reproduces an optical disk having an index information recording area in which index information of each record information can be written and a prohibition information recording area in which reproduction prohibition information of each record information piece can be written. An optical disk reproducing apparatus, which is a reproducing unit that reads and reproduces the index information, the reproduction prohibition information, and the recording information piece, a display unit that displays the index information, and the reproduction prohibition information of the optical disc. Discriminating means for discriminating whether or not reproduction is prohibited for each piece of recording information recorded on the optical disc, and reproduction for prohibiting reproduction by the reproducing means of the recording information piece for which reproduction is prohibited based on the discrimination. Prohibition means,
Display prohibition means for prohibiting display of the index information corresponding to the recorded information piece whose reproduction is prohibited on the display means based on the determination.

[0008]

According to the first aspect of the invention, the discriminating means discriminates whether or not reproduction is prohibited for each piece of recorded information recorded on the optical disk, for example, for each music information, based on the reproduction prohibition information read by the reproducing means. To do. Based on this determination, the reproduction prohibiting means prohibits the reproducing means from reproducing the recorded information piece whose reproduction is prohibited.

Therefore, the reproduction can be prohibited for each recorded information piece only by writing the reproduction prohibition information in advance. Further, according to the second invention, the determining means is
Based on the reproduction prohibition information read by the reproduction means, it is determined whether or not reproduction is prohibited for each record information piece recorded on the optical disc, for example, for each music information. The reproduction prohibiting means prohibits the reproducing means from reproducing the recorded information piece whose reproduction is prohibited based on the determination.

Further, the display prohibiting means prohibits display of index information corresponding to the recorded information piece whose reproduction is prohibited, for example, a music piece number on the display means, based on the discrimination.
Therefore, it is possible to prohibit the reproduction for each record information piece only by writing the reproduction prohibition information in advance, and the index information corresponding to the record information piece whose reproduction is prohibited is not displayed. Operability is improved without displaying unnecessary information.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the drawings. FIG. 1 shows the configuration of an embodiment in which the present invention is disclosed for an MD recording / reproducing apparatus.

The MD 20 has a magneto-optical disk body 21 having a magnetic film, and a cartridge 22 for protecting the magneto-optical disk body 21. A guide groove is formed in the magneto-optical disk main body 21, and the guide groove is used for data indicating absolute time information (ATIP: Absolute Time).
It is formed so as to wobble (meander) at a frequency modulated by FM in In Pregroove.

As shown in FIG. 1, the MD recording / reproducing apparatus 100 has a spindle motor 1 for rotationally driving a magneto-optical disk body 21, an actuator (not shown) and a polarization beam splitter, and a rotating magneto-optical disk. The main body 21 is irradiated with a laser beam, and this laser beam causes magnetic K in the magnetic film of the main body 21 of the magneto-optical disk.
Due to the err effect, the polarization plane is slightly rotated and reflected, and the magneto-optical signal is read from the beam that is returned and the RF (Radio
Frequency) Optical pickup 2 for outputting signal
And RF for amplifying the RF signal to an appropriate level
The amplifier 7, the ATIP decoder 6 capable of detecting the temporal position in the magneto-optical disk main body 31 by detecting the wobbling frequency from the RF signal even when information is not recorded, and the EFM signal (EFM: EFM: Ei
EFM for extracting ght to Fourteen Modulation)
A decoder 9, a magnetic head 3 for writing information by applying magnetic field modulation to the position of a magnetic film heated to a Curie temperature or higher by a laser beam, a head drive circuit 5 for driving the magnetic head 3, and 1 Mbit. DRAM (Dynamic Random Access Memory) for temporarily storing a certain amount of recorded information data and preventing skipping due to vibration, etc.
2, a DRAM control circuit 11 for controlling the input and output of data to and from the DRAM 12, and an A / D converter 15 for converting an analog information signal input from the outside at the time of information recording into a digital information signal. And a data compression encoder 13 for compressing the data amount of the digital information signal to about ⅕ using the minimum audible limit characteristic of human ear and masking effect, and EFM demodulation read from MD 20 at the time of information reproduction. The data compression decoder 14 for decompressing the reproduced signal and outputting a digital audio signal, the D / A converter 16 for converting the restored digital audio signal into an analog signal, and the optical pickup 2 for the magneto-optical disk body. A carriage 4 for moving in a radial direction of 21;
A servo control circuit 8 for servo-controlling the spindle motor 1, the carriage 4, and an actuator (not shown), a system controller 10 for controlling each part of the MD recording / reproducing apparatus 100, and an operation command from the outside to the system controller 10. A key input section 18 for displaying the performance state of the MD recording / reproducing apparatus 100 and a display section 17 for displaying the performance state of the MD recording / reproducing apparatus 100 are connected to each other as shown in the drawing. With this configuration, the servo control circuit 8 receives the RF signal from the RF amplifier, extracts and sends a control signal for controlling the carriage 4 and an actuator (not shown), and sends the laser beam to the magneto-optical disk body. Tracking servo control is performed so as not to deviate from the recording track axis line 21. Further, the servo control circuit 8 is an EFM
Spindle servo control is performed by sending a control signal for rotating the spindle motor 1 at a constant speed based on a clock signal included in the EFM signal from the decoder 9.

The system controller 10 can send a control signal to each part of the player based on an operation command input from the outside to the key input part 18 to perform a high speed search operation, a random access play operation, or the like.

Next, the operation of this embodiment will be described with reference to FIGS. Figure 2 shows the MD TOC (Table Of Conte
nts) shows an example of information structure. The TOC information of the MD can be configured in the same manner as the TOC information of the conventional CD, and the track number TNO, the recording start time of the track, the reproduction mode data that specifies whether or not the track is reproduction prohibited, and the track of the track. Reproduction level data that controls the output level during reproduction, program reproduction order data that records the reproduction order during program reproduction, and identification (ID) corresponding to a so-called password for canceling the reproduction prohibition specification of the song.
Data can be recorded. Of these, the reproduction mode data, the reproduction level data, the program reproduction order data, and the ID data are written in the subcode Q data.

FIG. 3 shows an operation flowchart. In the following, when the ID data for which the preset reproduction prohibition designation is valid is not input (when the ID mode is set) and when the ID data which can invalidate the preset reproduction prohibition designation is input (ID mode release) Time)
I will explain it separately. A) When no ID data is input When the MD 20 is set and a play key (not shown) of the key input unit 18 for instructing normal reproduction is pressed, the system controller 10 reads the TOC information of the MD and refers to the subcode Q data. Then, the reproduction mode data, the reproduction level data, and the ID data are extracted (step S
1).

Next, the system controller 10 determines from the retrieved reproduction mode data whether or not some of the music information recorded in the MD to be reproduced is reproduction prohibited. If any of the music information is designated to be prohibited from reproducing, the TOC content (entire) is adjusted (step S2). More specifically, as shown in FIG. 2, the total number of songs is 5 (the song number TNO
= 1 to 5) and the second music piece (TNO = 2) and the fourth music piece (TNO = 4) are designated as reproduction prohibited,
Track number TNO = 1, 3, 5 Display track number DTNO
= 1, 2, and 3 are set.

After that, the display music number DTNO is displayed on the display unit 17 by using the display music number DTNO (step S3). Next, the system controller 10
It is determined whether or not the ID data is input (step S4). In this case, since the ID data is not input, it is determined whether or not the program reproduction is performed (step S4).
5). More specifically, it is determined which of the play key (not shown) and the program play key of the key input unit 18 has been pressed.

A) At the time of normal reproduction When a play key (not shown) of the key input unit 18 for instructing normal reproduction is pressed, the system controller 10 performs a normal reproduction operation (step S6). Specifically, reproduction is performed in the order of the song numbers TNO = 1 → 3 → 5. In this case, as shown in FIG. 2, the output level of each song is 0 decibels for the song with the song number TNO = 1.
Output in decibels, the song number TNO = 3 outputs 0 decibel at -3 decibels, and the song number TNO = 5 outputs 0 decibel at -6 decibels.

Even if the ID data is not input, if there is no music information designating reproduction inhibition as shown in FIG. 4, the original music piece number TNO is used as the display music piece number DTNO. The display is displayed on the display unit 17 (step S3), and since the play key is pressed, the normal reproduction operation is performed (step S6). In this case, the output level of each song is, as shown in FIG. 4, the song number TNO =
The 0 decibel of each of the songs 1, 2, 3, 4, and 5 is output as 0, 0, -3, -10, and -6 decibel, respectively.

B) During program reproduction When the program play key (not shown) is pressed in place of the play key (not shown) of the key input section 18 in the determination of step S5, the system controller 10 determines based on the reproduction mode data and the ID data. It is determined whether or not some of the music information recorded in the MD to be reproduced is designated as reproduction prohibited. If any of the music information is prohibited,
Adjust the TOC content. More specifically, as shown in FIG. 2, the total number of tunes is 5 (tune numbers TNO = 1 to 5), and the second tune (TNO = 2) and the fourth tune (TNO = 4) are prohibited to be reproduced. If it is, the program reproduction is performed in the order of the program number TNO = 1 → 5 → 3 based on the program reproduction order data (step S7).
In this case, as for the output level of each song, as shown in FIG. 2, the song of the song number TNO = 1 outputs 0 decibel at 0 decibel, and the song of the song number TNO = 5 outputs 0 decibel at −6 decibel. The output of the song number TNO = 3 is 0 decibels at -3 decibels.

Even if the ID data is not input, FIG.
As shown in, when the music information recorded does not include the music information for which reproduction is prohibited, the program reproduction operation is performed based on the program reproduction order data (step S7), and the track number TNO = 1 → 5. The reproduction is performed in the order of → 2 → 3 → 4. In this case, the output level of each song is set based on the output level data, and 0 dB of each song number TNO = 1, 5, 2, 3, 4 is 0, -6, 0, -3, respectively. Output as -10 decibels. B) When ID data is input When the MD 20 is set, the system controller 10
Reads the TOC information of the MD, refers to the subcode Q data, and extracts the reproduction mode data, the reproduction level data, and the ID data (step S1).

Next, the system controller 10 determines from the retrieved reproduction mode data whether or not some of the music information recorded in the MD to be reproduced is designated as reproduction prohibited. If any of the music information is designated to be prohibited from reproducing, the TOC content (entire) is adjusted (step S2). More specifically, as shown in FIG. 2, the total number of songs is 5 (the song number TN
If the second song (TNO = 2) and the fourth song (TNO = 4) are designated to be prohibited in playback, the song numbers TNO = 1, 3, 5 are displayed songs. Number DT
Set as NO = 1, 2, 3.

After that, the display music number DTNO is displayed on the display unit 17 by using the display music number DTNO (step S3). Next, the system controller 10
It is determined whether ID data has been input (step S4). When an ID key (not shown) of the key input unit 18 is pressed, the ID data input waiting state is entered, and when the user inputs the ID data, the ID data is stored in a memory (not shown). Music information having ID data equal to the input ID data is in a reproducible state even when reproduction prohibition is designated. When music information having different ID data exists on one MD, only music information having ID data equal to the input ID number can be played.

Next, the system controller 10 determines whether or not all ID data has been input (step S8). a1) During normal reproduction (partial ID data input) If all the ID data is not input in the determination in step S8, that is, if the music information specifying the reproduction prohibition still exists, the input ID data is input. The TOC content is adjusted by using the track number TNO of the music information except the music information having ID data different from
9) Generate a display track number DTNO. More specifically, as shown in FIG. 2, the total number of songs is 5 (the song number T
NO = 1 to 5), the second song (TNO = 2) and the fourth
The song (TNO = 4) is specified as playback prohibited, and the second
Track ID (TNO = 2) ID data = “4010”, 4th
When the ID data of the music piece (TNO = 4) = “0201” and the input ID data = “4010”, the music piece numbers TNO = 1, 2, 3, 5 are displayed.
Set as 1, 2, 3, 4.

After that, the display program number DTNO is displayed on the display section 17 by using the display program number DTNO (step S10). The key input section 18 for instructing the normal reproduction.
When a play key (not shown) is pressed, it is determined that the program reproduction is not performed (step S5), and the system controller 10 performs a normal reproduction operation (step S5).
6). More specifically, the system controller 10 performs reproduction in the order of the track number TNO = 1 → 2 → 3 → 5. In this case, the output level of each song is as shown in FIG.
As shown in, the 0 decibels of the songs of the song numbers TNO = 1, 2, 3, 5 are respectively 0, 0, -3, -6.
Output as decibels.

A2) During normal reproduction (input of all ID data) When all the ID data are input in the determination in step S8, that is, as the input ID data, "
If both 4010 "and" 0201 "are input, all the reproduction prohibition designations are canceled and the music information for the reproduction prohibition designations does not exist, so the original song number TNO.
The TOC contents are adjusted by using and displayed on the display unit 17 (step S10).

When a play key (not shown) of the key input unit 18 for instructing the normal reproduction is pressed, it is determined that the program reproduction is not performed (step S5), and the system controller 10 performs the normal reproduction operation (step S6). .. More specifically, the system controller 10 uses the track number T
The reproduction is performed in the order of NO = 1 → 2 → 3 → 4 → 5. In this case, as shown in FIG. 2, the output level of each music piece is 0, 0, -3, -1 for each 0 decibel of the music piece number TNO = 1, 2, 3, 4, 5.
Output as 0 and -6 decibels.

B1) During program reproduction (partial ID data input) Next, when a program play key (not shown) of the key input unit 18 for instructing program reproduction is pressed, the ID data extracted from the subcode Q data of the MD and Compare the input ID data. As a result, the prohibition designation is canceled for the music information having the matching ID data.

In the determination in step S8, all I
If the D data has not been input, that is, if there is still music information designating playback prohibition, the input I
The TOC contents are adjusted by using the music number TNO of the music information excluding the music information having ID data different from the D data (step S9), and the display music number DTNO is generated. More specifically, as shown in FIG. 2, the total number of songs is 5
A song (tune number TNO = 1 to 5) and a second song (TNO =
2) and the 4th song (TNO = 4) are designated to be prohibited from reproduction, and the ID data of the 2nd song (TNO = 2) = “4”
010 ", ID data of the fourth song (TNO = 4) =" 0 "
When the input ID data is "4010", the music piece numbers TNO = 1, 2, 3, 5 are set as display music piece numbers DTNO = 1, 2, 3, 4.

Thereafter, the display program number DTNO is displayed on the display unit 17 using the display program number DTNO (step S10), and it is determined that the program is reproduced because a program play key (not shown) is pressed. (Step S5), the program reproducing operation is performed based on the program reproduction order data (Step S7). Specifically, the reproduction is performed in the order of the song number TNO = 1 → 5 → 2 → 3. In this case, as shown in FIG. 2, the output level of each song is 0 for the song with the song number TNO = 1.
Decibel is output at 0 decibels, song number TNO = 5 is output at 0 decibels at -6 decibels, song number TNO = 2 is output at 0 decibels at 0 decibels,
The song number TNO = 3 outputs 0 decibel at -3 decibel.

B2) During program reproduction (all ID data input) In the determination in step S8, if all the ID data are input, that is, both "4010" and "0201" are input as input ID data. In this case, all the reproduction prohibition designations are canceled and the music information of the reproduction prohibition designations does not exist, so the original song number T
The content of TOC is adjusted using NO, and the content is displayed on the display unit 17 (step S10).

Key input unit 18 for instructing program reproduction
When a program play key (not shown) is pressed, it is determined that the program reproduction is performed (step S5), and the program reproduction operation is performed based on the program reproduction order data (step S7). That is, the track number TNO = 1
The reproduction is performed in the order of → 5 → 2 → 3 → 4. In this case, the output level of each song is the song number TNO =
The 0 dB of each of the songs 1, 5, 2, 3, and 4 is output as 0, -6, 0, -3, and -10 dB, respectively.

As described above, according to this embodiment,
A desired song among the songs recorded on the MD can be set to the reproduction prohibited state or canceled. Although only the MD recording / reproducing apparatus has been described in the above embodiments, the present invention can be applied to other writable optical disks such as a phase change optical disk. Further, in the above embodiments, the user inputs the ID data. However, if the ID data is stored in the memory of the MD recording / reproducing apparatus in advance, the stored ID data can be stored. And I recorded in MD
By comparing the D data, the reproduction prohibited state can be automatically canceled, and the usability can be improved. Further, in the above-mentioned embodiments, although the numeral is used as the ID data, the alphabet, "*",
It is also possible to use symbols such as "#" and combinations thereof.

[0035]

According to the first aspect of the invention, the discriminating means discriminates, based on the reproduction prohibiting information read by the reproducing means, whether or not reproduction is prohibited for each piece of recorded information recorded on the optical disc, and reproduces the reproduced information. Since the prohibiting means prohibits the reproducing means from reproducing the recorded information piece whose reproduction is prohibited based on this determination, it is possible to reproduce the recorded information piece, for example, the music information by writing the reproduction prohibition information in advance. It is possible to prohibit or allow.

According to the second invention, the discriminating means is
Based on the reproduction prohibition information read by the reproduction means, it is determined whether or not reproduction is prohibited for each piece of recording information recorded on the optical disc, and the reproduction prohibition means determines the recording information whose reproduction is prohibited based on this determination. Reproduction by one piece of reproduction means is prohibited. Further, the display prohibition means, based on the above determination,
Index information corresponding to the recorded information piece whose reproduction is prohibited,
For example, since the display of the song number on the display means is prohibited,
By simply writing the reproduction prohibition information in advance, it becomes possible to prohibit or permit the reproduction for each record information piece, for example, for each music information. Furthermore, since the index information corresponding to the recorded information piece whose reproduction is prohibited, for example, the song number, is not displayed, unnecessary information is not displayed during the operation, and the operability is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of an MD recording / reproducing apparatus of an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of TOC information.

FIG. 3 is an operation flowchart of the embodiment.

FIG. 4 is a diagram illustrating another example of TOC information.

[Explanation of symbols]

 1 ... Spindle motor 2 ... Optical pickup 3 ... Magnetic head 4 ... Carriage 5 ... Head drive circuit 6 ... ATIP decoder 7 ... RF amplifier 8 ... Servo control circuit 9 ... EFM decoder 10 ... System controller 11 ... DRAM control circuit 12 ... DRAM 13 ... data compression encoder 14 ... data compression decoder 15 ... A / D converter 16 ... D / A converter 17 ... display section 18 ... key input section 20 ... MD 21 ... magneto-optical disk main body 22 ... cartridge 100 ... MD recording / reproducing apparatus

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinya Takahashi 4-2610 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa Plant (72) Inventor Izumi Ueda 4-2610 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa Plant (72) Eiji Muramatsu Eiji Muramatsu 4-2610 Hanazono, Saitama Prefecture Pioneer Co., Ltd. Tokorozawa Plant (72) Inventor Takahiro Okajima 4-2610 Hanazono, Tokorozawa City Saitama Pioneer Co., Ltd. Tokorozawa Plant ( 72) Inventor Toshihiro Maehara 4-2610 Hanazono, Tokorozawa, Saitama Prefecture, Tokorozawa Plant, Pioneer Co., Ltd. (72) Inhabitant, Hitoshi Kasama 4-2610 Hanazono, Tokorozawa, Saitama Prefecture, Tokorozawa Plant, Pioneer Co., Ltd.

Claims (3)

[Claims] 1. An optical disk reproducing apparatus for reproducing an optical disk having a prohibition information recording area in which reproduction prohibition information of each record information piece can be written, wherein reproduction is performed by reading and reproducing the reproduction prohibition information and the record information piece. Means for determining whether or not reproduction is prohibited for each piece of recording information recorded on the optical disk based on the reproduction prohibition information, and the recording information for which reproduction is prohibited based on the judgment An optical disk reproducing apparatus comprising: a reproduction prohibiting unit that prohibits reproduction of one piece by the reproducing unit. 2. An optical disk reproducing apparatus for reproducing an optical disk having an index recording area in which index information of each recording information piece can be written and a prohibition information recording area in which reproduction prohibition information of each recording information piece can be written. Reproducing means for reading and reproducing the index information, the reproduction prohibition information and the recorded information piece, a display means for displaying the index information, and the reproduction prohibition information of the optical disc for recording on the optical disc. Discriminating means for discriminating whether or not reproduction is prohibited for each recorded information piece, reproduction prohibiting means for prohibiting reproduction by the reproducing means of the recorded information piece whose reproduction is prohibited based on the discrimination, Display prohibition means for prohibiting display of the index information corresponding to the recorded information piece whose reproduction is prohibited on the display means based on the determination. Optical disk reproducing apparatus, characterized in that. 3. The optical disk reproducing apparatus according to claim 2, wherein the display means, when displaying the index information, is based on index information of the recording information piece other than the recording information piece whose reproduction is prohibited. An optical disk reproducing device, comprising: display index information generating means for generating display index information by means of which the display index information is displayed.