JPH10116467A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the memory capacity necessary for managing artist's names added to disks, respectively, in a reproducing device capable of reproducing plural disks. SOLUTION: An artist's name is inputted and registered in an artist list. An artist number is added corresponding to the artist's name. In this case, the artist's name is recognized without distinguishing a capital letter from a small letter. A housed and reproducible disk is identified by a disk number and an artist number is given to the artist's name corresponding to each disk. Inputing of an artist's name is performed by key operation by a user or a copy extracted from the CD text information. In the artist list, by preventing the duplication of the artist's name and using the artist number corresponding to the disk number, the memory capacity is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a disc-shaped recording medium in which sub-codes are recorded in addition to main digital data such as audio data and visual data, for example, a reproducing apparatus for a digital audio CD (compact disc). And a suitable reproducing apparatus.

[0002]

2. Description of the Related Art In a CD reproducing apparatus for reproducing a CD on which audio information is recorded, for convenience of use,
Various displays based on disc playback information are provided. As is well known, a program number recorded as a mode 1 in a Q channel subcode to be described later, a so-called track number, and time information assigned to each track number are reproduced and displayed.

Further, recently, it has been proposed to record character information associated with a CD on a CD using the R to W channels of the subcode recorded in the lead-in area. This is called CD text. When playing a CD based on the CD text format, C
The information of the D text is read when the CD is loaded. The read CD text information is decoded, stored in memory and further displayed. Therefore, C to be reproduced
The disc title of D, the name of the performer, and the like are displayed, and the user can immediately grasp the contents of the CD.

[0004] Such a CD text is useful for a CD changer for selectively reproducing a desired one from a large number of CDs, for example, 100 sheets. In the case of a conventional CD changer that corresponds to a CD text, character information (for example, an artist name) unique to the CD of the disk number is stored in the storage device in correspondence with the disk number as shown in FIG. It is memorized. In FIG. 38, if the loaded CD does not correspond to the CD text, or if the user does not register character information,
Is loaded, no character information is stored (for example, disk number "5"). The disc number corresponds to the number of the slit in which the CD is loaded. FIG.
This is an example in which up to N CDs can be loaded and managed. This stored content is displayed by the display device. The user can see the display to understand the contents of the loaded CD,
It is possible to select a CD to be played.

[0005]

As described above, in a conventional CD changer, one character information (for example, an artist name) is stored for one CD. Therefore, when the character information is defined as, for example, a maximum of 16 characters, there is a disadvantage that a memory having a capacity of N × 16 characters is required. On the other hand, if the storage capacity of the memory is limited, the storage and display of the number of characters of the character information unique to the disc may be restricted.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a reproducing apparatus capable of reducing a memory capacity required for storing character information associated with a disk-shaped recording medium.

It is another object of the present invention to provide a reproducing apparatus capable of recognizing and sorting character information associated with a disk-shaped recording medium so that operability is improved.

[0008]

According to the present invention, in order to achieve the above object, a plurality of disc-shaped recording media can be mounted, and an arbitrary disc-shaped recording medium can be selected from the plurality of disc-shaped recording media. When character information is managed in correspondence with identification information unique to a disk-shaped recording medium in a disk playback device that can be dynamically reproduced, a code having an ascending / descending order is assigned to the character information, and the assigned code is assigned. A disk reproducing apparatus characterized in that a plurality of disk-shaped recording media are managed based on the following.

Further, the present invention relates to a disk reproducing apparatus capable of mounting a plurality of disk-shaped recording media and selectively reproducing an arbitrary disk-shaped recording medium from the plurality of disk-shaped recording media. Means for inputting or extracting character information corresponding to each of the identification information unique to the medium, a list composed of character information and codes having ascending / descending order corresponding to the character information, and a table for associating a code with each identification information; Storage means for storing character information of a plurality of disk-shaped recording media based on a list and a table, display means for displaying sorted results as characters, and a desired result by referring to the sorted results. A disk reproducing apparatus comprising: means for selecting a disk-shaped recording medium.

In a CD changer on which a plurality of disk-shaped recording media, for example, a CD can be mounted, a code, for example, a numeral having an ascending / descending order is given in correspondence with character information unique to the CD. Therefore, the capacity of a memory for storing character information can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a reproducing system and a reproducing apparatus according to the present invention will be described below with reference to the drawings. In one embodiment, a CD is used as a disk-shaped recording medium. However, the present invention is not limited to this, and other types of optical disks (for example, DVDs (digital video disks), magnetic tapes, optical tapes, semiconductor memories, and the like) are used. Further, the information recorded on the recording medium is not limited to audio data, but may be video data or the like.

To facilitate understanding of the present invention, the data structure of a CD for audio reproduction will be described. C
D indicates that the CD 101 has a hole 102 in the center as shown in FIG.
And the TOC (table
Of contents) a lead-in area 103, which is a program management area in which data is recorded, a program area 104 in which program data is recorded, and a program end area, a so-called lead-out area 105. Is formed. In the audio reproduction CD on which audio information is recorded, the program area 1
The audio data is recorded in an area 04, and time information of the audio data is managed in the lead-in area 103. Also, when the reading of the audio data in the program area 104 by the CD reproducing apparatus is completed and the pickup reaches the lead-out area 105, the CD reproducing apparatus ends the CD reproducing operation.

On a CD, sub-codes are recorded in addition to audio data as main data. Hereinafter, the data of the P channel and the Q channel of the subcode will be described. An audio signal recorded on a CD is
One sample or word is 16 bits and 44.1
It is sampled at a sampling frequency of kHz. The sampled data is one sample or one sample.
The 16 words of the word are divided into upper 8 bits and lower 8 bits to form symbols, and error correction coding processing and interleaving processing are performed on a symbol basis, and the audio data is combined into one frame for every 24 symbols. One frame corresponds to each of six samples of the left and right stereo channels.

By the EFM modulation, 8 bits of each symbol are converted into 14 bits. FIG. 2 shows a data structure of one frame after the EFM modulation. One frame 135 is 24
A synchronization pattern data area 131 of channel bits;
A subcode area 132 of 14 channel bits, 12
A program data area 133 including symbol program data D1 to D12, a parity data area 134 including four symbol parity data P1 to P4,
It comprises another program data area 133 and a parity data area 134. In order to connect each area or data part, a connection bit of three channel bits is allocated to each part. Therefore, one frame 13
5 includes a total of 588 channel bits of data.

FIG. 3 shows 98 frames collected and rearranged so that each area and data portion of the frame 135 are continuous in the vertical direction. The cycle of 98 frames shown in FIG. 3 is a unit for completing a subcode, and is called a subcode frame. This sub-code frame has a frame synchronization pattern section 136.
, Subcode section 137, data and parity section 1
38. This one sub-code frame is
This is equivalent to 1/75 second of the reproduction time of the CD.

Here, the subcode data including the data of the P channel and the Q channel is data recorded in the subcode section 137 in FIG. FIG. 4 shows the details of the data structure of the subcode frame of the subcode unit 137. The first frame F01 and the frame F02 are the subcode frame synchronization pattern S0,
S1. This synchronization pattern is, like the frame synchronization pattern, an EFM modulation method (eight to fourteen modu).
lation: EFM) out of rule
It is a pattern of. Further, each of the 8 bits of one symbol constitutes the P channel to the W channel of the subcode. For example, the P channel is S0,
It is composed of a part of S1 and P01 to P96.

The P channel of the subcode has information corresponding to the presence or absence of a program, and the Q channel has a CD.
Information such as the above absolute time information, time information of each program, a program number (also referred to as a track number), a movement number (also referred to as an index), and the like are included. Therefore,
The information included in the Q channel enables control of the reproduction operation such as the beginning of the program, and the display of the Q channel allows the user to determine the order of the program being played on the optical disk. The user can visually check the elapsed time of the performance and the absolute time from the beginning.

Further, the subcode R channel W
The data for the six channels up to the channel can be used, for example, for displaying a still image or the lyrics of a song.
Such a reproducing apparatus using the R channel to the W channel is called CD-graphics and is already known. Further, recently, a method (CD text) of recording additional character information on a CD using the R to W channels in the lead-in area has been proposed. In the case of this CD text, it is possible to record character information of about 6500 characters, and the additional character information of the CD is 8 characters.
It is assumed to be less than or equal to 00 characters, so that it can correspond to eight languages.

FIG. 5A shows data recorded on a CD. As described with reference to FIG. 1, the TOC data recorded in the lead-in area 103 and the program recorded in the program
No. 1 to No. n and data of the lead-out area 105 are recorded.

As shown in FIG. 5B, TOC data recorded on an existing CD uses a Q channel of a subcode. The subcode has a data structure in which 98 bits constitute one frame. 7 of these 98 bits
Two bits are data. The TOC data has the format shown in FIG. 5B.

When the number of programs is 6, the data structure in the TOC is as shown in FIG. When POINT is 00 to 99, PMIN, PSEC, PFRA
ME indicates the start address (absolute time) of each program. When POINT is A0, PMIN indicates the program number of the first program on the disc, and PSE
C and PFRAME are set to 00. When POINT is A1, PMIN indicates the program number of the last program, and PSEC and PFRAME are set to 00. P
When OINT is A2, PMIN, PSEC, PF
RAME indicates the address at which the lead-out starts. These contents are repeated three times as shown in FIG. Furthermore, it is repeatedly recorded in the lead-in area. Such TOC data is read by a playback device when a CD is loaded, and stored in a memory inside the device.

FIG. 7 is a diagram showing the TO according to an embodiment of the present invention.
It shows the structure of C data. In the case of an existing CD, as described above, the total number of programs (songs) and the recording position of each program are managed using 72-bit data in one frame of the subcode of the Q channel. More specifically, a program number that can take a value from 00 to 99, a start address (absolute time) corresponding to each program, a first program number, a last program number, and an address at which a lead-out starts are included. Has been recorded. In addition to this Q channel subcode,
Data composed of R channel to W channel as shown in FIG. 7 is recorded as TOC data.

The first two frames of data consisting of the R to W channels are synchronization patterns S0 and S1. The remaining 96 frames contain 9 symbols of 6 bits each.
Six symbols are included. These 96 symbols are divided into four by 24 symbols. These 24 symbols are called one pack, and four packs are called one packet.

At the beginning of each pack, mode information for setting the recording mode of information to be recorded in the pack, ID1 having identification information indicating the type of text information, and ID codes (ID2, ID3) having other identification information And I
D4) including a 24-bit ID code including
D region 1 is arranged. After this ID area 1, a text area 2 in which text information accompanying main data is recorded in 8-bit units is arranged. Furthermore, a cyclic code (CRC) is provided as an error detection code in each pack.
A CRC area 3 in which 16-bit data for performing error detection based on y code) is recorded is arranged.

Prior to the description of the subcodes of the R to W channels according to the present invention, existing graphic information is
The data format used when recording data to is described.
FIG. 8A is a diagram schematically showing the structure of the subcode unit 137 shown in FIG. The subcode is formed by 8 bits, and the bits forming this subcode are P, Q,
It is divided into eight channels of R, S, T, U, V, and W. The subcode section 137 is a collection of 98 frames composed of P to W channels.

The first two frames S0 and S1 are synchronization patterns. From the third frame to the 98th frame, a block 12, called a subcode P consisting of only P channel data, and a Q channel data Block 13, called subcode Q, consisting of
To W channel data only.

In the method of recording and reproducing image information as a subcode, as shown in FIG. 8B, one symbol is formed by 6 bits of R to W channels, and the minimum data unit is 24 symbols of 0 to 23. It is a pack formed by. That is, the block 11 is divided into four packs. Of the 24 symbols forming the pack, the first symbol (hereinafter referred to as symbol 0) is the MSB (most s).
3 digits from the significant bit) side indicate the mode, LSB
(Least significant bit) The three digits from the side indicate the item. The symbol 1 following the symbol 0 indicating the mode and the item is an instruction indicating the type of the instruction. Symbol 3 and symbol 4 following the instruction are a parity Q which is an error correction code. Each symbol from the symbol 4 to the symbol 19 following the parity Q forms a data field and includes color information and the like. Each symbol from the symbol 20 to the symbol 23 following the data field is a parity P which is an error correction code for protecting information in the pack.

There are four modes: a zero mode, a line graphics mode, a TV graphics mode, and a user mode. The zero mode is a mode in which no operation is performed on the display screen, for example. That is, this is a mode for when the user wants to keep the image as it is, and all data in the pack are 0.
In the line graphics mode, for example, a liquid crystal display or the like is provided on the front of the player to display a description of a program or the like.

Examples of the image processing command include a command to paint the entire screen in a certain color, a command to draw a picture using two colors for one screen font, and a command to move the entire screen vertically or horizontally. There are instructions to make it. Normally, in the case of displaying character data in CD graphics, the data field is treated as dot data.
As shown in FIG. 8C, the character can be represented by 6 × 12 dots.

As described above, the existing method of inserting graphics information into sub-codes (CD graphics) requires a dedicated processing circuit to process R to W channel data. Parity P
And the error correction method using parity Q is complicated,
The processing circuit is complicated. Therefore, the existing method is not suitable for use in which text information is simply recorded and reproduced using subcodes of R to W channels.

Therefore, in one embodiment of the present invention, when recording and reproducing text information using the R to W channels, a CD text format which can be realized by a simpler processing circuit is employed. FIG. 9A corresponds to FIG.
FIG. 5 is a diagram showing the data format indicated by the symbol “.” As serial data. As shown in FIG. 9A, data of 32 bits from the beginning (only 24 bits are shown in FIG. 9A) is divided into data of each byte, and these bytes are identified by ID for identification.
1, ID2, ID3, and ID4 are allocated to form an ID area 1. The subsequent text area 2 is also divided into data in byte units. Such processing on a byte-by-byte basis makes it possible to perform processing using the signal processing method for the Q channel, and a simple processing circuit configuration can be achieved.

In the data format shown in FIG. 8A, an error correction code using parity P and parity Q is used, whereas in the data format of CD text, an error detection code by CRC is used. Only when an error is detected, data is read again when the error is detected. Therefore, the data
In the TOC, for example, quadruplicate is written for each pack, and
A series of data strings are repeatedly recorded in packet units. With such multiplex recording, a complicated circuit for error correction can be omitted.

The multiplex writing in pack units is not limited to quadruple writing, and the unit of multiplex writing is not limited to pack units. For example, multiplex writing is performed in packet units or several packets in a cycle unit. Is also good.

The ID 1 at the head of the ID area 1 is as shown in FIG.
As shown in FIG.
It will be handled in bits. Furthermore, the 3 bits from the MSB are the same as the data in the above-mentioned mode so that even if the apparatus is mounted on a CD reproducing apparatus having a function of decoding the sub-codes of the existing R to W channels, the reproducing apparatus does not malfunction. Is written, and an undefined code, for example, mode 4 (“100”) is assigned as the mode indicated by the three bits. By doing so, an unrecognizable mode is only detected even if the reproducing apparatus is mounted on an existing reproducing apparatus. Therefore, the reproducing apparatus merely stops operation and does not have a possibility of malfunction. The undefined modes include mode 5 and mode 6 in addition to mode 4, and these modes can be used instead of mode 4.

Further, in one embodiment of the present invention in which mode 1 is designated by ID1, the data format in the pack is, as shown in FIG. 10, ID1, ID2, and ID2 divided by 8 bits (1 byte). ID3, ID4, text bytes text1 to text12, and a 12-bit CRC code.

ID1 has an 8-bit structure.
And the contents of data handled by the pack are defined as shown in FIG. ID1 is Mode 4 as described above.
(8 × h) (h means a hexadecimal number, and x means a value of the lower 4 bits).

ID1 indicates the contents of the character string following text1. (80h) is the album name / program name, (81h) is the performer / conductor / orchestra name,
(82h) is a poet, (83h) is a composer, (84h)
Is the arranger, (85h) is the message, (86h) is di
scID, (87h) is a search keyword, (88h)
Is TOC, (89h) is 2nd TOC, (8ah) is user, (8bh) is lyrics, (8ch) is lyrics 2, (8d
H) is a reservation, (8eh) is a reservation, and (8fh) is a size.

ID2 indicates to which track the character string written from the text position of the pack belongs. As shown in FIG. 12, track numbers 1 to 99 are recorded in ID2. Since the track number is from 1 to 99, other numerical values "0" and "100"
(64h) The above has a special meaning. “00” means representing the entire disc. The MSB is always 0, and 1 is an extension flag.

ID3 is a serial number assigned to the block. As shown in FIG. 13, the serial number in the block is 0.
0 to 255 (0 to FFh). ID3 = 0
Is always the first pack of ID1 = 80h, and 80
Is completed, the process returns to 81 and 82 and is repeated. ID1 that is not included in the additional information is replaced with the next ID1, but is always recorded in the order of the smallest number.

ID4 indicates the character code of the current pack and the character position of the character string. As shown in FIG.
The first 4 bits are a character code, “0000” is an ASCII code, “0001”, “0010”, “0”.
“011” and “0100” are 885 based on the ISO standard.
9-1 (a), 8859-1 (b), 8859-1 (c), 8
859-1 (d) code, “0101” is reserved, “011”
"0" is JIS Kana code, "0111" is MS-JIS
It is a code. It should be noted that "1000" and thereafter are reserved. The 4 bits of the LSB are
The number of the character of text1 is shown. "0000"
Is the first character, “0001” is the second character, “001”
"0" is the third character, "0011", "010"
.. Are the fourth, fifth,... Characters.

FIG. 15 shows an example of the configuration of a pack (ID1 = 80h). (ID1 = 80h) is used to record an album name (also referred to as a disc title) and all program names of up to 99 songs. The last character of each character information is always terminated with null (00h). The next program name is written continuously after the null. 16A to 16D, the album title is “BEALES space (indicated as SP in the figure) THE space BEST”, the first song title is “LOVE space ME space DO”, and the second song title is “ The example shows that "THE space WAVE" is recorded and the title of the third song is "PLEASE space HELP".

As shown in FIG. 16A, since the album title is shown, (80h) is recorded in ID1,
2, the album title indicates the entire disc,
(00h) is recorded. Further, ID3 includes 1
(00h) indicating the third pack is recorded and ID4
Indicates the ASCII code, and (00h), which is the number of characters 0 displayed in the previous pack, is recorded.
text1 to text12 contain the "BEALES space TH
12 characters indicated by “E space” are included, and characters that cannot be included in this pack, that is, “BEST space LO
The nine characters VE "are in the second pack.

FIG. 16B shows the contents of the second pack.
Since ID1 indicates the album title, (80h)
Is recorded, and (00h) is recorded in ID2 because the album title indicates the entire disc. Further, ID3 means the second pack (01h)
Is recorded, and ID4 means an ASCII code,
In addition, (0Ch) in hexadecimal notation with 12 characters already displayed in the previous pack is recorded. From text1 to text12,
Nine characters indicated by "BEST space LOVE" are entered, a null code indicating the end of the album title, and "LOVE space M" which is the program name of the first song.
Seven characters of "E" are included in pack 2, and three characters of "space DO" that cannot be included are included in the third pack.

Similarly, FIG. 16C shows the contents of the third pack. Since ID1 indicates the program name, (80
h) is recorded, and ID00 records (00h) indicating that the first character recorded in pack 3 is the first song. Furthermore, (02h) meaning the third pack is recorded in ID3, and ASCII is recorded in ID4.
(0) in hexadecimal notation, which means the title code of the first song, which means the code and is already displayed in the previous second pack.
7h) is recorded. In text1 to text12, three characters indicated by "space DO" are entered, and a null code indicating the end of the title of the first song and eight characters of "THE space WAVE" which is the program name of the second song are included in pack 3. .

Similarly, FIG. 16D shows the contents of the fourth pack. Since ID1 indicates the program name, (80
h) is recorded, and (03h) indicating that the first character recorded in the pack 4 is the third song is recorded in ID2. Further, (03h) meaning the fourth pack is recorded in ID3, and ASCII is recorded in ID4.
Since it means a code and there is no title character number already displayed in the previous third pack, (00h) in hexadecimal is recorded. From text1 to text12, "PLEAS
11 characters indicated by "E space HELP" are entered, and a null code indicating the end of the title of the first music piece is recorded.

FIG. 17 shows an example of the configuration of a pack (ID1 = 81h). (ID1 = 81h) is used to record an album name such as a performer / conductor / orchestra name or a person name (artist name) corresponding to each program name. As shown in FIGS. 18A to 18C, each name is written in succession after being terminated with a null (00h) in the same manner as described in FIGS. 16A to 16D. . FIGS. 18A to 18C show that the performer representing the album is “MICHELAL SPACE JAC”.
KSON ”, the first song performed by“ JANET Space J
ACKSON ", the second song is performed by" M. JACK ...
. ".

FIG. 19 shows an example of the configuration of a pack (ID = 85h). (ID = 85h) is used to record a message for each program in the same manner as recording an album name and each program name. FIG.
20A through FIG. 20D, the message is null (0
After the termination at 0h), writing is continued one after another.
ID2 indicates a track number synchronized with the message from 1 to 63, and each other numerical value has a special meaning.

"00" is a message representing the album. “70” to “7f” are used when a message is recorded in the language of the exceptional country. "7
"0" is German, "71" is French, "72" is Spanish, "73" is Italian, "74" is Dutch, "75" is Russian, "78" is Chinese, "79"
Is Japanese and “7A” is Korean. FIG. 20A, FIG.
0B, as shown in FIG.
Space You space Very space Much space Please space Enjoy! Is recorded. FIG. 20D shows a case where a message “See space You space Bye” is present in the 15th music piece. This 15th song
It can be determined by decoding (ID2 = 0Fh).

FIG. 21 shows an example of the structure of the pack (ID1 = 86h). (ID1 = 1) indicates a disk ID, in which, in addition to the ID code, the name of the seller and the P
An OS (Point Of Sale) code, year of release, etc. may be recorded.

FIG. 22 shows an example of the configuration of the pack (ID1 = 87h). (ID1 = 87h) is a search keyword, and the search ID is determined by a 2-byte genre code and a person name or keyword representing the entire disc. In the case of a genre code that cannot be expressed here, it is possible to capture with / character string / after text3. FIG. 23A
As shown in FIG. 23C, the genre code “00”
"17", genre capture character string "JapaneseRo
ck'80 ", and the search keyword is" Y. Ozaki "
Is shown.

FIGS. 24A and 24B show (ID1 = 8
8h) is a configuration example of the pack. FIG. 24A shows a configuration in the case of (ID2 = 00h). (ID1 = 88h) is T
In the OC (Table Of Contents), the normal TOC information is
To W information is recorded. (ID
FIG. 24B shows a configuration in the case of 2 = 01h to 63h).

FIG. 25 shows an example of the configuration of the pack (ID1 = 89h). (ID1 = 89h) is the 2nd TOC,
It is provided to point to a special part that cannot be represented in the normal TOC. In this example, 2ndTOC is
It is used to indicate the most impressive part (genre information) of a song such as a so-called rust part. text1 indicates the priority, (00h) is the highest priority, (01h) is the next, and (FFh) is the lowest. text2 indicates the total number of points, and about 3 points are recommended for one disk. text3 to text6 are reserved. text7, text
The start address of the digest is indicated by 8, text9, and the subsequent three text bytes text10, text
The digest end address is indicated by 11, text12. This address is, for example, absolute time information on a CD. Each byte of a text byte is a digit of a minute (a value of 00 to 74), a second (a value of 00 to 59), and a digit of a frame (a value of 00 to 74). Is recorded.

As shown in FIG. 26A, a pack (89h) indicating a digest is recorded in ID1.
In ID2, (01h) is recorded as a program number for which digest reproduction is specified. further,
For example, (11h) is recorded as a number indicating a serial number in ID3, and (0) is recorded as a current block number in ID4.
0h) is recorded.

In text1, (02h) is recorded as the priority number, and indicates the priority in the program in which the digest point is specified. In text2, a digest point set in one disc is recorded. In this case, (10h) is recorded, indicating that three places are set. text3 to text6
Are reserved, and text7 to text9 record 1 minute, 2 seconds, and 10 frames as the starting address of the digest point. From text10 to text12, the end point address of the digest point is 1:43:20.
A frame has been recorded.

The next pack is shown in FIG. 26B. In ID1, (89h) indicating a pack for digest is recorded, and in ID2, (02h) is recorded as a program number for which digest reproduction is specified.
Further, ID3 has a serial number such as (1
2h) is recorded, and (01h) is recorded as the current block number in ID4.

In text1, (01h) is recorded as a priority number, and indicates that the digest point is the second priority in the program in which the digest point is specified. text2
Records the digest points set in one disc. In this case, (10h)
Is recorded, indicating that three locations have been set. text
From 3, text6 is reserved and from text7, text
9 contains 1 as the starting address of the digest point.
0 minutes, 2 seconds and 20 frames are recorded. From text10,
In text12, 10 minutes, 20 seconds, and 10 frames are recorded as the end point address of the digest point.

Next, the third pack is shown in FIG. 26C. ID
1 shows a pack for digest (89h)
Is recorded, and (03h) is recorded in ID2 as a program number for which digest reproduction is specified. Further, for example, (13h) is recorded as a serial number in ID3, and (02h) is recorded as a current block number in ID4.

In text1, (00h) is recorded as a priority number, and indicates that the priority is the highest among the programs for which the digest point is specified. In text2, a digest point set in one disc is recorded. In this case, (10h) is recorded, indicating that three places are set. text3
From, text6 is reserved and from text7, text9
Has 12 as the starting address of the digest point.
Minutes 50 seconds 40 frames are recorded. From text10,
In text12, 13 minutes, 10 seconds, and 20 frames are recorded as the end point address of the digest point.

The starting address and the ending address are absolute times, and are absolute addresses from the starting point of the program on the disk.

FIGS. 27A and 27B show (ID1 = 8
It is a configuration example of the pack of fh). (ID1 = 8fh) indicates the size. The size is a summary of the number of packs of each item in one block, and is composed of two packs shown in FIGS. 27A and 27B.

As described above, the recording medium according to the present invention, for example, a CD, is composed of 6 bits corresponding to the R to W channels of the subcode recorded in the TOC area along with the main data (audio data). 24 of the symbol
Data is configured in packet units, with one symbol being one pack and four packs being one packet, and mode information for setting a recording mode of information recorded in the pack is recorded at a head position of each pack, and Information written in each pack is identification information and text information or digest information recorded in units of 8 bits.

FIG. 28 shows the configuration of an embodiment of a reproducing apparatus (specifically, a CD changer) to which the present invention is applied. This embodiment supports CD text and
The user has a predetermined number of bytes of text data (for example, 8 bytes of text data) corresponding to each CD to be reproduced.
It has a function that can register. This registered text data is called a custom file.

In FIG. 28, reference numeral 61 denotes a disk to be reproduced. The disc 61 is selectively taken out from a number of discs stored in the disc storage section 60a by the autochanger function, and loaded by the disc mounting section 60b. The disk storage section 60a and the disk mounting section 60b are controlled by a controller (microcomputer) 70. The disc 61 is driven to rotate by a spindle motor 63, and recorded contents are read by an optical pickup 62.

The signal from the optical pickup 62 is
It is supplied to the RF amplifier 64. The RF amplifier 64
It has the function of a signal processing circuit and performs processes such as binarization of an RF signal, generation of a tracking error signal TE, and a focus error signal FE. These error signals TE and FE are supplied to the servo signal processing circuit 65. The servo signal processing circuit 65 performs focus control and tracking control processing. The focus actuator and the tracking actuator in the optical pickup 62 are driven by signals passed through the drive circuits 66 and 67. Although not shown, a device for moving the pickup 62 in the disk radial direction is also controlled by the servo signal processing circuit 65. The servo signal processing circuit 65 is provided with an interface for receiving a control command from the controller 70.

The binarized reproduction signal from the RF amplifier 64 is supplied to the PLL 68, the EFM demodulation circuit 69 and the timing generation circuit 71. The PLL 68 generates a clock synchronized with the reproduction signal. The digital audio signal from the EFM demodulation circuit 69 is converted by the D / A converter 72 into an analog audio signal. This audio signal is supplied to the volume / tone control unit 78. When the user operates the operation unit 81, the volume / tone control unit 78 is controlled by a control signal output from the controller 70. A speaker 80 is connected to the volume / tone control unit 78 via an audio output amplifier 79.

The output signal of the RF amplifier 64 is supplied to the timing generation circuit 71, and a timing signal synchronized with the reproduction signal is generated. The output signal of the timing generation circuit 71 is supplied to the CLV processor 73. The spindle motor 63 is CLV driven by the CLV processor 73.

Further, the disc reproducing apparatus shown in FIG.
The subcode separated by the EFM demodulation circuit 69 is supplied to the subcode processor 74. In the subcode processor 74, processing such as error detection of the subcode is performed.
The Q channel and the R to W channels of the subcode are separated and output. The subcode Q is supplied to the controller 70, and RW are supplied to the CD text decoder 75.

The CD text decoder 75 decodes subcodes of the R to W channels. The CD text decoder 75 has a small-capacity RAM, and outputs data in response to a request from the controller 70. Output CD
As the text data, data necessary for the system is selected in the controller 70 and stored in the CD text memory 76. For example, the CD text data in the specified language is stored in the memory 76. The CD text memory 76 stores ID information, digest information, size information, etc., in addition to character information reproduced from the lead-in area of the CD and generated by decoding. The CD text memory 76 is composed of, for example, an SRAM.

The controller 70 issues a command to the servo signal processing circuit 65 to control the servo system and decoding. Further, a custom file memory 7 for storing custom file data in association with the controller 70.
7 are provided. The custom file memory 77
For example, it has a configuration of a nonvolatile memory. The controller 70 controls the operation state of the playback device.

A display unit 82 including a display driver is connected to the controller 70. The display unit 82 is, for example, a liquid crystal display device. The display unit 82 may be a display device such as a television monitor connected to the outside of the playback device. An operation signal from the operation unit 81 is provided to the controller 70. The operation unit 81 includes a key for playing a disc, a key for selecting a program, a key for searching, a key for inputting and registering a custom file,
The operation unit 81 includes a key for selecting and displaying a custom file, a CD text, and the like, and a mouse for moving a cursor on the screen of the display unit 82 and causing the playback device to perform a desired operation. ing.

Since the custom file memory 77 is a non-volatile memory, its stored contents are preserved even when the power of the playback apparatus is turned off. The custom file data is registered when the user operates the operation unit 81. The RAM and CD in the controller 70
The contents stored in the text memory 76 are not retained when the power is turned off.

In the above-described embodiment, when a disc to be reproduced is selected, reading of TOC data is started. In the case of a conventional disc, the subcode of the Q channel is read as TOC data. In the case of a CD in the CD text format, in addition to the subcode of the Q channel, R to R in the CD text format are used.
The subcode of the W channel is read.

In this embodiment, an artist name is managed as character information relating to a disk. However, not limited to the artist name, character information indicating the contents of each disc, such as a disc title and a program title, may be managed. FIG. 29 conceptually shows the management of the artist name in this embodiment. For management, an artist list 91 and an artist number table 92 for each disk are created and stored. Since the list 91 and the table 92 are preferably stored even when the power is turned off, the list 91 and the table 92 are stored in a non-volatile memory such as a custom file memory 77.

As shown in FIG. 29, the artist list 9
1 is a list in which artist names exist in correspondence with the numbers of the artist numbers. In the example of the figure, the artist number “5” or less is an unregistered artist name and is empty. In the artist list 91, the artist number is not limited to a numeral, but may be a character (for example, an alphabet) having a descending order, a symbol, or the like.
Japanese may be used as the artist name. The data amount of the artist name is limited to, for example, 16 bytes.

In the table 92, the disk number is
This corresponds to the number of the disk mounting slit in the disk storage section 60a. When up to N disks can be stored, the disk numbers are 1 to N. An artist number is stored corresponding to each disk number. In FIG. 29, the correspondence between the artist number in the table 92 and the artist number in the list 91 is connected by a line. The identification information unique to the disk is not limited to the disk number described above, and other information such as the total time in the TOC data may be used.

Considering the usage state of a certain user, in most cases, the artist names are duplicated. Therefore, when the maximum number of disks to be stored is N, the artist list 91 stores a storage area with fewer artist names than N. It is enough if you prepare. Further, since the table 92 of the disk number and the artist number is a management table including only the numbers,
Data volume is small. For these reasons, the amount of memory required to manage the artist name can be reduced as compared with the conventional method of registering the artist name for each disk (see FIG. 38).

FIG. 30 is a flowchart showing an entire artist name input process in one embodiment of the present invention. First, an input mode of an artist name (meaning character information of the artist name) is set (step S1). In the next step S2, it is determined whether a new artist name is to be registered. That is, there are two methods for registering an artist name, one of which is a process of registering a new artist name (step S3), and the other is a method of registering an artist name that has already been registered. This is the selection process (step S4).

Then, the artist name input by any method is registered after performing a process such as checking the artist name and re-sorting (step S5). As described above, the process of FIG. 30 is executed by the controller 70 based on the operation of the operation unit 81, and the list 91 and the table 92 (custom file memory 7) shown in FIG.
7 is created.

The processing S3 for inputting a new artist is as follows.
This is performed according to the flowchart shown in FIG. First, an empty artist number ART from the artist list 91
emp is acquired (step S11). This artist number ART Disk number D of the disk to register emp
no artist number storage area artistno [D no] (step S12). Then, in step S13, the artist name is set to the artist number in the artist list.
ART Put in emp. The artist name is obtained by operating a key of the operation unit 81 by the user. Entered artist name is artist number AR in artist list
T emp artist name storage area artist [ART emp)
to go into.

The process of inputting an artist name with reference to a list of already registered artist names is shown in FIG.
Is performed according to the flowchart shown in FIG. First, the artist list 91 is displayed, and the disc number D It is determined to which artist “no” belongs (step S14). ART for this selected artist number Indicated by sel. Disk number D to be registered no artist number storage area artistno [D no] artist number ART selected Insert sel (Step S1
5). Next, the selected artist number ART If it is necessary to change the artist name of sel, the changed artist name is stored in the storage area artist [ART sel] (step S16).

FIG. 33 shows a more detailed process of registering the artist name input as described above (step S5). First, in step S21, it is determined whether or not the input artist name is included. This is a check to see if a blank has been entered. If the artist name is included (not a blank input), the process proceeds to step S22, and it is checked whether the input artist name exists in another area. This step S22 is necessary to prevent the same artist name from being registered repeatedly.

When the result of step S22 is affirmative
(That is, in the case of overlapping), step S23
The disk number D you want to register no artist
Number storage area artistno (D no) in other areas.
Issued artist number ART Change to SAME. And
In step S24, the currently input artist is invalidated.
To

Then, in step S25, the arch
Sort and add notes to the list. Step S2
6. In the custom file TAG, the artist
Turn on (`1 ') the bit corresponding to the file. this
The bit is tag [D no] .f Represented by artist. This TA
The artist is registered by the bit in G
Is indicated. And the artist registration process
finish.

If it is determined in step S26 that the artist
If the name is determined to be blank input, step S2
Artist who became blank in 7
Delete the artist file on the disk belonging to
Artist number storage area artistno (D no)
change to none). And the same as step S25
In step S28, a note is written to the artist list.
Are added and sorted, and the process ends.

The above-described artist input and registration processing is performed by operating the operation unit 81 by the user. If the disc to be played corresponds to CD text, the reproduced and decoded artist name can be used. The processing in that case is shown in the flowchart of FIG.

In the first step S31, the disk number D no previous artist number is artistno [D n
o] Write it down as a note. PRE this artist number
V Represented as ARTno. Artist name data (a name) (Step S
32). Next, it is checked whether or not the artist name is included (step S33).

If no artist name is entered, that is, if the artist name is blank, step S3
5, the tag [D] corresponding to the artist file in the TAG of the custom file no] .f artist
Turn off (`0 ').

If it is determined in step S33 that the artist name is included, in step S34, the bit tag [D] corresponding to the artist file in the TAG of the custom file is set. no] .f Turn artist on (`1 '). Then, in step S36, it is determined whether or not the extracted artist name has already been registered.

If it is determined that registration has been made, step S37
At disk number D no artist number storage area artistno [D no) and the artist name (a
Enter the artist number ART exist in which (name) exists. If it is determined in step S37 that it is not registered, in step S38, the empty number ART in the artist list is used. Get emp and disk number D no
Artist number storage area artistno [D [no]). Then, the artist name (a free number AR that obtained name)
T Copy to emp's artist name storage area. In this copy, the artist names are sorted. In this way, the artist name in the CD text can be added by copying.

Further, if another disk was previously inserted and the PREV In step S40, it is checked whether or not the artist belongs to ARTno, and as a result of the replacement with the text disk, the artist is changed to another person. That is, PR
EV ARTno ≠ ART none, artistno [D no) ≠ PREV
If ARTno is satisfied, it is determined that the disc has been replaced and the artist number has changed. If this condition is not satisfied, the process ends.

When the condition of step S40 is satisfied,
Is the disk number D besides no, PREV Belongs to ARTno
Previous artist number PR only when there is no disc
EV ARTno artist name artist [PREV ARTno]
It is deleted from the chest list (step S41). This
Is there a list of artist names that are no longer needed?
Removed.

Step S22 in FIG. 33 or FIG.
In step S36, it is checked whether or not the input artist name or the artist name extracted from the CD text information has already been registered. If it is determined that the artist name has not been registered, the artist name is added to the artist list. I have to. In this check, in one embodiment of the present invention, the case of the artist name is not distinguished. For example, if there is an artist name registered in the artist list as "Billey Joel", the same artist name is used even if the input artist name or the artist name extracted from the CD text information is "BILLEY JOEL" recognize. Thereby, it is possible to prevent the list of substantially duplicate artist names.

Steps S25 and S28 in FIG. 33, FIG.
The sorting process performed in step S39 of FIG. 4 will be described with reference to FIG. Assume that four artist names are in the artist list as shown in FIG. 35A. That is, the artist names are as follows. "Maria Takeuchi""MARIAHCAREY""MR.big""MR.CHILDREN" In the drawings, the space is represented by SP.

In the artist name sorting process, the first character is viewed and the characters are sorted in the order of ASCII code. In this order, uppercase letters precede lowercase letters and spaces precede the alphabet.
Therefore, sorting is performed in the order as shown in FIG. 35C. However, the sort result in FIG. 35C is such that the artist name having a space at the head has a higher rank, or upper case is different from alphabetical order. Therefore, in order for the user to recognize the artist name,
Not easy to see.

Therefore, in one embodiment of the present invention, FIG.
The artist names such as A are rearranged in the order shown in FIG. 35B. That is, if the artist name with a space at the beginning is lower, and even if uppercase and lowercase letters are mixed,
You can get the result of the sort that matches alphabetically. Therefore, it becomes easy for the user to recognize the artist name from the artist name list.

The process of sorting the artist names as shown in FIG. 35B is performed according to the flowchart of FIG. Here, the two character strings A and B of the artist name in FIG. 35A are compared. For example, A: "Maria T
akeuchi ”, B:“ MARIAH CAREY ”
It is. In a first step S51, a space at the head of each character string is removed.

That is, A: "Maria Takeuchi" B: "MARIAH CAREY" In the next step S52, the number of characters in each character string is counted. Count value A cnt = 14, B
cnt = 12 is detected. Then, since the shorter characters are compared, the number of characters for comparison C CNT is set to 12 (step S53). Then, the counter is reset (step S54).

In the next step S55, the character A [CONT] at the position corresponding to the count value of the counter of each character string
And B [CONT] for comparison, character code A CODE and B Convert to CODE. In this conversion table, characters are converted so that values are increased in alphabetical order without regard to case. The space has a code value smaller than that of the character, and the symbol has a rank after the alphabet. More specifically, the processing can be performed by converting a lowercase letter to an uppercase letter.
However, the table for converting characters into codes for comparison is not limited to such a table, and may be any table that satisfies the condition of not distinguishing between uppercase and lowercase letters.

In the example of FIG. 36, the character conversion process is
This is performed immediately before the comparison is performed character by character.
It may be performed before or after 1. In that case, the entire string must be converted.

Whether the character codes after conversion match
A comparison is made (step S56). If they match
Calculates the count value CONT at step S57.
To reset. Then, in step S58, (C
CNT <CONT? ) Is checked. That this relationship holds
Means that the comparison for the set number of characters has been completed.
To taste. If this relationship is not satisfied,
Returns to step S55, and the comparison of the character codes after the conversion is performed.
Continued. Therefore, the comparison of the set number of characters has been completed.
At this point, if the result of step S58 is positive, two sentences
Character strings A and B are determined to be the same (step S5)
9).

In step S56, the character strings A and
The two character codes at the same comparison position in B are equal
If not, in step S60, (A CODE>
B CODE). Where this relationship is satisfied
In this case, the character string B having the small character code value is the character string A.
It is determined that there is a higher priority (step S61). This
Is not satisfied, in other words, the character code A
Is smaller than the value of the character code B, the character string A
Is given priority over the character string B (step S6).
2).

Specifically, in the case of A: "Maria Takeuchi" B: "MARIAH CAREY", after removing the leading space,
It is determined that the first to fifth characters at the comparison character position are the same. Since the sixth character position is a space and 'H', the character string A including the space is given priority.

In the above-described embodiment of the present invention, a memory (for example, on the custom file memory 77, an artist list 91 as shown in FIG. 29 and an artist number table 92 for each disk number are stored). .
Then, when displaying the artist name on the display unit 82 based on these, the artist name corresponding to the artist number is displayed.

The display of the artist name will be described with reference to FIG. FIG. 37A shows a display 121 when displaying the disks stored in the order of the disk numbers (the numbers of the slits into which the disks are loaded). A display 122 indicating the display of the order of the disk numbers is displayed at the top of the screen. In this display 121, the artist names are displayed in order of disk numbers for every ten disks. By placing the cursor on the upper left / right key 123 and clicking on it, the disc number can be changed in ± 10 steps. In the example shown,
The artist names of the disc numbers (91 to 100) are displayed. By moving the cursor to the up / down key 124 on the right side of the display 121 and clicking on it, the disc number can be changed by ± 1. In the display 121, “T” added after the artist name indicates that the artist name is extracted from the CD text information.

In this display 121, the keys 123 and 124 are operated to select the disk having the desired disk number. The artist name of the selected disc number is
Although not shown, the status changes to one that indicates selection (for example, inversion of black and white, change of the background color of characters, blinking of characters, etc.). Then, when the play key or the enter key is pressed, the selected disc is reproduced. By operating a predetermined key, the displayed ten disks can be played back continuously or randomly.

Next, when the sort key provided on the operation unit 81 is pressed, a display 125 indicating alphabetical sort is displayed as shown in FIG. 37B, and the album titles are arranged in alphabetical order from top to bottom. Display 1
26 is presented. In the example shown in the figure, among the stored disks, five disks having an album title starting with “P” are displayed. In this display 126, the user operates the key 123 to display the first album title.
The second character can be selected, and the desired disk can be selected by operating the key 124. In addition, an operation mode in which all the displayed disks are played back continuously or randomly is also possible.

Further, when the sort key is pressed, as shown in FIG. 37C, a display 128 including a display 127 indicating that the mode is a mode of sorting by the artist name is displayed. Further, a display 129 of the name of the currently selected artist is made. The artist name is the left / right key 12
3 can be changed. The order of the artist names is sorted as described above. In addition, the disc number and album title of the disc having the selected artist name among the stored discs are displayed. In the example of the figure, four disks are displayed.

The desired disk can be selected by the up / down key 124. Also, it is possible to play all the displayed disks continuously or randomly. As described above, since the artist name is managed by the artist number, the process of grouping disks having the same artist number can be easily performed. Furthermore, when the sort key is pressed, the display returns to FIG.
It returns to the display 121 of 7A. Thus, each time the sort key is pressed, the display changes cyclically.

[0109]

As described above, according to the present invention, when managing character information associated with a disc extracted from an input or reproduction signal, a list of codes and character information having an ascending / descending order is provided. A table showing the correspondence between disc-specific identification information and codes is created. Therefore,
In this list, the character information does not overlap, and the table has the number of disks × the data amount of the code. this is,
To provide an artist name storage area for each disc,
Compared to the method of storing (the number of disks × the number of bytes of character information), the data amount is small, and the storage capacity of the memory can be reduced. Further, the grouping of the stored disks is facilitated by using the code, and an operation of selecting and reproducing only disks of the same artist becomes possible.

Furthermore, by not distinguishing between uppercase and lowercase characters, the same character information can be prevented from being registered in duplicate, and the memory capacity can be further reduced. Furthermore, since search and sorting are performed using the assigned code instead of the character information itself, the processing time can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an area of a conventional music reproduction CD to which the present invention can be applied.

FIG. 2 is a schematic diagram illustrating data of one frame.

FIG. 3 is a schematic diagram illustrating a data structure of an entire subcode frame.

FIG. 4 is a schematic diagram illustrating data of all channels of a subcode signal.

FIG. 5 is a schematic diagram showing the entire data structure of a CD and the structure of TOC data.

FIG. 6 is a schematic diagram showing a configuration of TOC data recorded in a lead-in area of a conventional CD.

FIG. 7 is a schematic diagram illustrating data of all channels of a subcode signal.

FIG. 8 is a schematic diagram showing an overall data format of a subcode.

FIG. 9 is a schematic diagram showing one pack and one symbol of a data format of a CD text.

FIG. 10 is a schematic diagram showing data format allocation according to an embodiment of the present invention.

FIG. 11 is a diagram showing the contents of data indicated by ID1.

FIG. 12 is a diagram showing the contents of data indicated by ID2.

FIG. 13 is a diagram showing the contents of data indicated by ID3.

FIG. 14 is a diagram showing the contents of data indicated by ID4.

FIG. 15 is a diagram showing the contents of music title ID data.

FIG. 16 is a diagram used to explain data of a song title ID.

FIG. 17 is a diagram used for describing data of a player ID.

FIG. 18 is a diagram used for describing data of a player ID.

FIG. 19 is a diagram used for describing data of a message ID.

FIG. 20 is a diagram used to describe data of a message ID.

FIG. 21 is a diagram used to describe data of a disk ID.

FIG. 22 is a diagram used to describe search ID data.

FIG. 23 is a diagram used to describe search ID data.

FIG. 24 is a diagram used for describing TOC data.

FIG. 25 is a diagram used for describing 2ndTOC data.

FIG. 26 is a diagram used for describing 2ndTOC data.

FIG. 27 is a diagram used to describe data of a size pack.

FIG. 28 is a block diagram showing a configuration of an embodiment of a reproducing apparatus according to the present invention.

FIG. 29 is a schematic diagram for describing management of an artist name in one embodiment of the present invention.

FIG. 30 is a flowchart showing an artist name input process according to an embodiment of the present invention;

FIG. 31 is a flowchart showing a process for newly inputting an artist name in one embodiment of the present invention.

FIG. 32 is a flowchart showing a process of inputting an artist name from already registered artist names in one embodiment of the present invention.

FIG. 33 is a flowchart showing a process of registering an inputted artist name in one embodiment of the present invention.

FIG. 34 is a flowchart showing a process of taking an artist name from CD text information and adding it to an artist list in one embodiment of the present invention.

FIG. 35 is a schematic diagram showing an artist name sorting process according to an embodiment of the present invention.

FIG. 36 is a flowchart showing a process of sorting artist names according to an embodiment of the present invention.

FIG. 37 is a schematic diagram illustrating a display example of an artist name in one embodiment of the present invention.

FIG. 38 is a schematic diagram for explaining a conventional artist name management method.

[Explanation of symbols]

1 ... ID area, 2 ... text area, 3 ... C
RC area, 4 pack, 5 packet, 60a
... Disk storage part, 60b ... Disk mounting part,
61: disk, 62: optical pickup, 7
4 ... Subcode processor, 75 ... CD text decoder, 76 ... CD text memory, 77 ...
・ Custom file memory, 81 ・ ・ ・ Operation unit, 82 ・
..Display unit, 91 ... Artist list, 92 ...
Table showing correspondence between disk numbers and artist numbers

Claims (10)

[Claims] 1. A disc reproducing apparatus capable of mounting a plurality of disc-shaped recording media and selectively reproducing an arbitrary disc-shaped recording medium from the plurality of disc-shaped recording media. When character information is managed corresponding to each of the identification information, a code having an ascending / descending order is assigned to the character information, and a plurality of disc-shaped recording media are managed based on the assigned code. A disc reproducing apparatus characterized in that: 2. The disc reproducing apparatus according to claim 1, wherein said identification information is a number of a slit for loading a disc. 3. The disc reproducing apparatus according to claim 1, wherein the identification information is additional information recorded on a disc. 4. The disc reproducing apparatus according to claim 1, wherein the character information is recorded on a disc in advance. 5. The disc reproducing apparatus according to claim 1, wherein the character information is input by a user. 6. The disc reproducing apparatus according to claim 1, wherein the managing means has a function of sorting based on the code having the assigned ascending / descending order, and can display the sorted result. A disk reproducing apparatus characterized by doing the following. 7. The disc reproducing apparatus according to claim 5, wherein the sorting is a process of rearranging the identification information in character code order without distinguishing between uppercase and lowercase letters. 8. The disk reproducing apparatus according to claim 5, wherein the sorting is a process of arranging the identification information in the order of character codes while ignoring a leading space of the character information. apparatus. 9. The disk reproducing apparatus according to claim 1, wherein the code having the ascending / descending order is a letter, a number, or a symbol. 10. A disc reproducing apparatus capable of mounting a plurality of disc-shaped recording media and selectively reproducing an arbitrary disc-shaped recording medium from the plurality of disc-shaped recording media. Means for inputting or extracting character information corresponding to each of the identification information, a character information list including the character information and a code having an ascending / descending order corresponding to the character information, and the code corresponding to each of the identification information Storage means for storing a table to be stored; display means for sorting character information of a plurality of disk-shaped recording media based on the list and the table; and displaying the sorted result as characters; and displaying the sorted result. Means for selecting a desired disc-shaped recording medium with reference to the disc reproducing apparatus.