JP2002025197A - Cd text storing and reproducing method, compact disk reproducing device, recording medium recorded with program for storing and reproducing cd text - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a CD text storing and reproducing method for reproducing a CD text from a musical compact disk in which the musical information and CD text additional information corresponding to the musical information are recorded, to provide a recording medium in which a program for the CD text storing and reproducing method is recorded, and to provide a compact disk reproducing device. SOLUTION: A CD text is read from a CD on which the musical information and CD text additional information are recorded, and the CD text data is re-arranged, simplified, and temporarily stored in a RAM 27. Further, the data stored in the RAM 27 is retrieved in accordance with the reproduction request from an external device, and is displayed on a display part 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to music information and additional character information (hereinafter abbreviated as "CD") corresponding to the music information.
Call it "text." ) For reading, storing, and reproducing character information from a compact disc for music on which
The present invention relates to a method for storing and reproducing D text, a compact disk reproducing apparatus, and a recording medium on which a program for storing and reproducing CD text is recorded.

[0002]

2. Description of the Related Art In recent years, music compact discs have been added to music information as additional character information for the music information, such as a song title, artist name, lyricist name, composer name, arranger name and message. Text data, that is, data that can record a CD text, has become widespread.

As shown in FIG. 18, such a music compact disc 1 has a disk shape, and extends in the center of a lead-in area 3 and in a circumferential direction outside the lead-in area 3. Music information area 5.

[0004] The lead-in area 3 is an area in which the above-mentioned CD text is recorded, and is an area secured at the beginning of one session corresponding to the music information area 5 in the compact disc 1. In this figure, the compact disc 1 having one session is taken as an example. However, in a multi-session compatible compact disc having a plurality of sessions, a lead-in area is secured at the beginning of each session.

[0005] The music information area 5 is an area where music information is recorded, and has a maximum of 99 tracks. Since music information for one song is recorded on one track, music information for a maximum of 99 songs can be recorded in the music information area 5.

FIG. 19 shows an internal configuration diagram of the lead-in area 3. As shown in FIG.
Made from a maximum of eight blocks B ₀ ~ block B _7, and each block has a hierarchical structure consisting of up to 256 packs P ₀ to P _255. Each pack further includes a header section 7, a text data section 9, and a cyclic redundancy check code (hereinafter abbreviated as "CRC") section 11. The header section 7, the text data section 9 and the CRC section 11 have data lengths of 4, 12, and 2 bytes, respectively, that is, each pack is 18-byte fixed length data.
In this figure, the subcode is not shown, but the CD text of mode 4 is recorded in the subcodes R to W in the lead-in area 3 of the standard described in the Red Book.

The header section 7 includes an identifier of each pack described later. The text data section 9 includes a text character string of additional information for 12 characters in a single byte code. CR
The C unit 11 includes an error check code for each pack.

A method for recording a CD text in the lead-in area 3 will be described with reference to FIGS. FIG.
Is a list of additional information to be recorded on the music compact disc 1. As shown in the figure, the additional character information includes, for example, an album name, a song title name, and the like. As shown in FIG. 21, the additional character information is divided and recorded in the text data section 9 of a plurality of fixed-length data packs in the lead-in area 3 of the compact disc 1. In FIG. 21, the text data portion 9 of each pack
Below the code, characters displayed when the code is reproduced are shown as display data. The code “00” indicates a delimiter of a text character string, and the code “20” is a space. The CRC code is not shown.

The header section 7 of each pack includes four identifiers ID1 to ID4. The first identifier ID1 is a type of text data described in the text data section 9,
That is, the code indicates the album name, song title, artist name, lyricist name, composer name, message, and the like. According to the standard, data types are categorized and indicated by 80 (h) to 8F (h). For example,
The album name and the song title are 80 (h).
Here, text data of different data types is not stored in the same one pack, and when a text character string ends in the middle of the text data part 9 and the next different data type is stored, Is filled with NULL up to the last digit of the text data portion 9.

The second identifier ID2 indicates the number of a track (song) in which the character string containing the character recorded in the first digit tx1 of the text data portion 9 of each pack corresponds to the additional character information. Show. For example, the character “N” recorded in the first digit tx1 of the text data portion 9 of the pack P1
Is the title of the first song, the second identifier ID2 is 01
(H).

The third identifier ID3 is a serial number assigned to the pack, and each block starts with an initial value "00".

The fourth identifier ID4 uses the lower 4 bits to indicate the character of the first digit tx1 of the text data portion 9 of each pack in the text character string. Here, the text character string is counted with the first character as 0. For example, the character of the first digit tx1 of the pack P3, in this case, a space (“20”) is assigned to the title “THE
ROOT ", the fourth identifier ID4
Is 3 (h). Further, the number of digits of the text character string stored in the text data part 9 is not limited. When the number of characters is 16 or more, the lower 4 bits of the fourth identifier ID4 are F (h).
Fixed at.

FIG. 22 shows a block diagram of a general music compact disk recording and reproducing apparatus (hereinafter abbreviated as "CD reproducing apparatus"). As shown in FIG.
The playback device 20 includes a CD drive unit 21 for mounting and rotating the compact disc 1, a signal processing unit 23 for performing signal processing including a pickup, and a predetermined program including a CD text storage and playback program of the present invention described later. A control unit 25 for controlling the entire apparatus in accordance with
Storage device 27 such as random access memory (RAM)
And a display unit 29.

The signal processing section 23 is electrically connected to the CD driving section 21, the control section 25 and the RAM 27. The control unit 25 includes the signal processing unit 23 and the RA
It is electrically connected to M27. The RAM 27 is electrically connected to the signal processing unit 23 and the control unit 25. The display unit 29 is electrically connected to the control unit 25.

The CD reproducing apparatus 20 is electrically connected to an external data request means 31 via a control section 25. The data request means 31 sends various data requests to C
This is performed by the D playback device 20 and receives a data signal obtained by a request from the CD playback device 20.

The control unit 25 of the CD reproducing device 20
Performs control such as taking out a signal from the compact disc 1 to the signal processing unit 23 and temporarily storing the signal in the RAM 27 in response to a signal input request such as music information output from the external data requesting unit 31. .

In the CD reproducing apparatus 20 configured as described above, music information and CD
FIG. 23 is a flowchart showing a conventional procedure for reading and reproducing a text. In the conventional CD text reproducing method, when the compact disc 1 is placed on the CD driving unit 21, the signal processing unit 23 and the control unit 25
Through the lead-in area 3 of the compact disc 1
23 is read in accordance with the procedure shown in FIG. 23 and is temporarily stored in the RAM 27.

As shown in FIG. 23, in step S1, 0 is set to initialize the track number n and the pack number i.
Set to. Proceeding to step S2, the i-th pack P
The ID 1 of i is set in the HD 1 corresponding to the data of the track n secured in the RAM 27. Proceeding to step S3, the track number n is set in HD2 of track n. Proceeding to step S4, text data is read from the text data section 9 of the i-th pack Pi. In the following step S5, the CRC check of the text data read in step S4 is performed by the CRC unit 11 of the i-th pack Pi.
And a CRC error check determination is made. In the case of a CRC error, the process proceeds to step S6, and in the case of a normal error, the process proceeds to step S7. In step S6,
The HD3 of the track n is set to 1 and the process proceeds to step S7.

In step S7, a NULL search is performed on the text data read in step S4 in order from the first character. If NULL is detected, the process proceeds to step S10. If NULL is not detected, the process proceeds to step S8, and the data read in step S4 is stored in the text data portion. At this time, if there is data stored earlier, it is stored subsequently. Proceeding from step S8 to step S9, 1 is added to i, and step S4
Return to

In step S10, the detected NULL
Are stored in the text data section of track n, and the character strings after NULL are stored in the text data section of the next track (n + 1). Proceed to step S11,
One is added to the track number n, and the process proceeds to step S12.
In step S12, it is determined whether or not the track number n is 99 or less.
If the number exceeds 9, the process ends. In this process,
The processing in the case where two or more NULLs are included in one pack is omitted.

In this way, the CD text in the lead-in area 3 of the compact disc 1 is read, and is temporarily stored in the RAM 27 in a data arrangement as shown in FIG.

When displaying the additional character information of the CD text on the compact disc 1, a text data display request is made from the external data request means 31, and in response to this request, the control unit 25 causes the control unit 25 to store the CD data stored in the RAM 27. The text additional character information is searched and read, and the read CD text is displayed on the display unit 29.

[0023]

However, in such a conventional CD text reproducing method, the CD reproducing apparatus 20
It was necessary to provide a large-capacity RAM 27 capable of storing additional character information corresponding to music information for up to 99 tracks. Alternatively, a CD having a small-capacity RAM 27
In the case of the reproducing apparatus 20, the capacity of the additional character information in the compact disk 1 to be read and stored in the RAM 27 is limited, that is, the CD that can be displayed by the CD reproducing apparatus 20
It was necessary to set a limit on the number of characters in text information. When data is read from the compact disc 1,
When an error is detected in the CRC check, there is a problem that the text data recorded in the corresponding pack cannot be displayed only by recognizing the error detection.

The present invention has been made in order to solve such a problem, and it is possible to reduce the capacity of a storage device of a CD reproducing apparatus, and even if an error is detected at the time of reading data from a compact disc, an error is detected. The present invention provides a CD text storing and reproducing method having means for restoring a CD, a compact disk reproducing apparatus, and a recording medium on which a CD text storing and reproducing program is recorded.

[0025]

According to the CD text storing method of the present invention, at least one type of text additional information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added. A CD text storage method for reading the additional text information from the compact music disc and temporarily storing the additional text information in a storage device in order to reproduce the additional text information from the compact music disc recorded by the following method: (a) Preparing a text data storage area and an identification information storage area in the storage device; (b) sequentially reading the packs from the music compact disc;
(C) storing the fixed-length character string of the pack read in step (b) in a text data storage area of the storage device in a predetermined order; and (d) storing the fixed-length character string read in step (b). Storing a part of the pack header as fixed-length pack information in the identification information storage area of the storage device in a predetermined order.

Here, the additional information includes an album name,
Song title, artist name, lyricist name, composer name,
There are types such as an arranger name and a message, which are recorded in the lead-in area of the compact disc for music. The lead-in area includes a maximum of eight blocks, and each block has a maximum of 256 packs. The above fixed length data area means this pack. Each pack includes a header section, a text data section, and a CRC section each having a data length of 4, 12, and 2 bytes.

The additional information is, for each music information of each track,
Each type of information includes a text character string, is separated by a predetermined delimiter, for example, a NULL code, and forms a continuous data string. This data string has a fixed data length. The data are divided into data areas, that is, text data portions of the pack, and are sequentially recorded.

The header section includes a predetermined identifier.
Shows various information of text data in the pack. In the text data portion, a text character string is divided and recorded every predetermined number of characters.

According to this method, the identifier information in the music compact disc is rearranged, simplified and stored as pack information in the address information storage area, and a text character string is converted independently of the identifier information. Since the data can be stored in the text data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

In the CD text storing method of the present invention, the pack includes an error check code, and the CD text storing method obtains (e) the error check code of the pack read in the step (b). When,
(F) determining the data read error of the pack based on the error check code obtained in step (e) when reading the pack in step (b); And storing the determination result in the identification information storage area of the storage device together with the determination result in the pack information.

Thus, even if an error is detected when reading data from the compact disk, the error can be recovered.

In the CD text storing method according to the present invention, in the step (d), the pack information is stored in the storage device such that the capacity of the storage device is smaller than the capacity of the CD text area of the music compact disc. In the identification information storage area.

As a result, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

According to the CD text reproducing method of the present invention, at least one type of text additional information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added, and recorded. A CD text reproducing method, comprising: reading the text additional information from a compact disc and temporarily storing the text additional information in a storage device; and extracting and reproducing the text additional information from the storage device in response to a reproduction request. At
(A) preparing a text data storage area and an identification information storage area in the storage device; (b) sequentially reading the packs from the music compact disc; and (c) this step (b). B) storing the fixed-length character string of the pack read in the text data storage area of the storage device in a predetermined order;
(D) storing a part of the header of the pack read in the step (b) as fixed-length pack information in the identification information storage area of the storage device in a predetermined order; (F) searching for the identification information storage area of the storage device based on the reproduction request condition input in step (e), and Obtaining the pack information; and (g) calculating a storage location of the specified text additional information in the text data storage area of the storage device based on the pack information obtained in step (f). And (h)
Extracting the text additional information from the storage position calculated in step (g).

Thus, the information of the identifiers in the compact disc for music is rearranged and simplified and stored as pack information in the address information storage area, and the text character string is converted to a text independently of the identifier information. Since the data can be stored in the data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

According to the CD text reproducing method of the present invention, at least one type of text additional information for music information recorded on at least one track is composed of a variable length character string and a separator inserted between the variable length character strings. The text additional information is read from a music compact disc in which the text additional information is divided into a plurality of packs each including a fixed-length character string to which a header is added and recorded, and is temporarily stored in a storage device. And reproducing the text additional information from the storage device in response to a reproduction request, wherein the header stores the text additional information recorded in the pack. The type code and the track of music information corresponding to the text additional information recorded in the pack are continuously attached. A rack number code, a pack number code consecutively attached to the pack, and a character number of the character string of the text additional information divided and recorded in the pack are recorded in the first digit of the pack. (A) preparing a text data storage area and an identification information storage area in the storage device; and (b) storing the pack from the music compact disc. (C) storing the fixed-length character string of the pack read in this step (b) in a text data storage area of the storage device in a predetermined order; and (d) the step ( storing a part of the header of the pack read in b) as fixed-length pack information in the identification information storage area of the storage device in a predetermined order; And (f) inputting a reproduction request condition designating arbitrary text additional information; and (f) based on the track number code and the data type code included in the reproduction request condition input in step (e). Searching the identification information storage area of the storage device to obtain the pack information of the pack; and (g) extracting the pack number code and the character number code from the pack information obtained in step (f). Calculating a start address of the text data storage area of the storage device in which the text additional information is stored, based on the pack number code and the character number code; and (h) calculating a start address of the storage device. Extracting the character string of the pack from the start address of a text data storage area; (I) detecting the delimiter code of the text additional information from the character string extracted in the step (g); and (j) storing the delimiter code until the delimiter code is detected in the step (i). Repeating the extraction of the character string from the text data storage area.

As a result, the identifier information in the music compact disc is rearranged and simplified, stored as pack information in the address information storage area, and a text character string is converted to a text string independently of the identifier information. Since the data can be stored in the data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

According to the CD text reproducing method of the present invention, the pack includes an error check code, and the CD text reproducing method reads (k) the error check code from the music compact disc, and reads the error check code. Determining the data read error of the pack when the pack is read in the step (b), and (l) including the determination result in the step (k) in the pack information. Storing in the identification information storage area of a storage device.

Thus, even if an error is detected when reading data from the compact disk, the error can be recovered.

The CD text reproducing method of the present invention comprises the steps of (m)
The one before the start address of the text data storage area of the storage device in which the text additional information next to the text additional information to be extracted according to the reproduction request condition input in step (e) is stored; Calculating the address as the final address, (n) setting the address at the time when the delimiter code is detected in the step (i) as the end address, and (o) calculating the final address in the step (m). Is determined to be less than or equal to the end address obtained in step (n); and (p) when it is determined in step (o) that the final address is smaller than the end address, Replacing the end address with the last address. This prevents end address extraction errors.

According to the CD text reproducing method of the present invention, (q)
Determining whether or not the track number codes extracted in step (g) are continuous;
(R) supplementing the track number code if it is determined in step (q) that the track number codes are not continuous.

As a result, even when the track number is missing, the CD text data corresponding to the requested additional information can be reliably retrieved and reproduced.

In the CD text reproducing method according to the present invention, the text additional information may include a song title, an artist name, a lyricist name, a composer name, an arranger name, and a message. Further, the type code may identify a type of the text additional information. Further, the CD text reproducing method of the present invention may further include a step of displaying the character string extracted in the step (h).

The compact disk reproducing apparatus of the present invention
The text additional information is read out from a compact disc for music in which at least one type of additional text information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added and recorded, and temporarily read out. A compact disk playback device comprising: a storage device for temporarily storing the text additional information from the storage device in response to a playback request;
The storage device includes a text data storage area and an identification information storage area, reading means for sequentially reading the pack from the music compact disc, and a fixed-length character string of the pack read by the reading means,
While storing in the text data storage area of the storage device in a predetermined order, a part of the header of the pack read by the reading unit is stored in the identification information storage area of the storage device as a fixed length pack information. Control means for storing in the order; input means for inputting a reproduction request condition for specifying arbitrary text additional information; and the identification information storage area of the storage device based on the reproduction request condition input by the input means. A pack information obtaining unit that searches and obtains the pack information of the pack; and, based on the pack information obtained by the pack information obtaining unit, stores the specified text additional information in the text data storage area of the storage device. Address calculating means for calculating a storage position, and extracting the text additional information from the storage position calculated by the address calculating means. It has a structure as comprising an extraction means for.

According to this configuration, the information of the identifiers in the compact disc for music is rearranged and simplified to be stored as pack information in the address information storage area, and the text character string is converted independently of the identifier information. Since the data can be stored in the text data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

The compact disk reproducing apparatus of the present invention
At least one type of text additional information for music information recorded on at least one track includes a variable-length character string and a delimiter code inserted between the variable-length character strings. Means for reading the text additional information from a music compact disc divided into a plurality of packs including fixed-length character strings and having the added text string temporarily stored in a storage device, and in response to a reproduction request, Means for extracting and playing back the text additional information from the storage device, wherein the header comprises: a type code of the text additional information recorded in the pack; and a text additional information recorded in the pack. A track number code continuously assigned to the track of the music information corresponding to the information; A pack number code, and a character number code indicating which character of the character string of the text additional information recorded in the pack is recorded in the first digit of the pack, The storage device includes a text data storage area and an identification information storage area, reading means for sequentially reading the pack from the music compact disc, and a fixed-length character string of the pack read by the reading means, While storing in the text data storage area of the storage device in a predetermined order, a part of the header of the pack read by the reading unit is stored in the identification information storage area of the storage device as a fixed length pack information. Control means for storing in the order, input means for inputting a reproduction request condition for specifying arbitrary text additional information, Pack information obtaining means for searching the identification information storage area of the storage device based on the track number code and the data type code included in the reproduction request condition and obtaining the pack information of the pack; The pack number code and the character number code are extracted from the pack information acquired by the acquisition unit, and the text of the storage device in which the text additional information is stored is stored based on the pack number code and the character number code. Address calculation means for calculating a start address of the data storage area, extraction means for extracting the character string of the pack from the start address of the text data storage area of the storage device, and extraction by the address calculation means Detection for detecting the delimiter code of the text additional information from a character string Means, and means for repeating extraction of the character string from the text data storage area of the storage device until the detection means detects the delimiter code.

According to this configuration, the information of the identifiers in the compact disc for music is rearranged and simplified to be stored in the address information storage area as each pack information, and the text character string is converted independently of the identifier information. Since the data can be stored in the text data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

The compact disk reproducing apparatus of the present invention
The pack includes an error check code, and the compact disc reproducing device reads the error check code from the music compact disc, and based on the error check code, the reading unit reads the pack. An error determination unit that determines an error in reading the data of the pack, wherein the control unit stores the determination result of the error determination unit in the identification information storage area of the storage device while including the determination result in the pack information. It has a characteristic configuration.

With this configuration, even if an error is detected when reading data from a compact disc,
The error can be recovered.

The compact disk reproducing apparatus of the present invention
The address immediately before the start address of the text data storage area of the storage device in which the text additional information next to the text additional information to be extracted according to the reproduction request condition input by the input means is stored. A final address calculating means for calculating as a final address, an end address obtaining means for setting an address at the time when the delimiter code is detected by the detecting means as an end address, and a final address calculated by the last address calculating means for determining whether the end address is the end address. Means for replacing the end address with the last address when the end address is smaller than the end address obtained by the address acquisition means.

With this configuration, it is possible to prevent a mistake in extracting the end address.

The compact disk reproducing apparatus of the present invention
When the track number codes extracted by the address calculating means are not continuous, means for complementing the track number codes is included.

With this configuration, even if the track number is missing, the CD text data corresponding to the requested additional information can be reliably searched and reproduced.

The compact disk reproducing apparatus of the present invention
The additional text information may include a song title, an artist name, a lyricist name, a composer name, an arranger name, and a message. Further, the type code may identify a type of the text additional information. Further, the compact disc reproducing apparatus of the present invention may further include a display unit for displaying the character string extracted by the extraction unit.

A computer readable recording medium on which the CD text storage program of the present invention is recorded is a computer-readable recording medium wherein at least one type of text additional information for at least one piece of music information includes a fixed-length character string to which a header is added. CD text storage program for reading the text additional information from the music compact disc and temporarily storing the text additional information in the storage device in order to reproduce the text additional information from the music compact disc divided and recorded in the pack In a computer-readable recording medium on which (a) is stored;
Preparing a text data storage area and an identification information storage area; (b) sequentially reading the packs from the music compact disc; and (c) fixing the packs read in this step (b). Storing a long character string in a text data storage area of the storage device in a predetermined order; and (d) the step (b).
And storing in the identification information storage area of the storage device a part of the header of the pack read in the above as fixed length pack information in a predetermined order.

Thus, the information of the identifiers in the compact disc for music is rearranged and simplified and stored as pack information in the address information storage area, and the text character string is converted to a text independently of the identifier information. Since the data can be stored in the data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

[0057] In the recording medium on which the CD text storage program of the present invention is recorded, the pack includes an error check code, and the CD text storage program (e) reads the error of the pack read in step (b). Obtaining a check code; and (f) determining a data read error of the pack based on the error check code obtained in step (e) when the pack is read in step (b). ,
(G) storing the determination result in step (f) in the identification information storage area of the storage device while including the determination result in the pack information.

Thus, even if an error is detected when reading data from the compact disk, the error can be recovered.

According to the recording medium storing the CD text storage program of the present invention, in the step (d) of the CD text storage program, the capacity of the storage device is equal to the capacity of the CD text area of the music compact disc. The pack information is stored in the identification information storage area of the storage device so as to be smaller. As a result, it is possible to reduce the capacity of the storage device necessary for reading from the compact disk and storing the additional information.

The text additional information includes a song title,
It may include an artist name, lyricist name, composer name, arranger name and message. Also, the type code is
The type of the text additional information may be identified.

In the recording medium on which the CD text reproducing program of the present invention is recorded, at least one type of text additional information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added. Reading the text additional information from the recorded music compact disc and temporarily storing the text additional information in a storage device, and extracting and reproducing the text additional information from the storage device in response to a reproduction request. (A) preparing a text data storage area and an identification information storage area in the storage device, and (b) the music compact. Reading the packs sequentially from the disk; and (c) in this step (b) Storing the fixed-length character string of the inserted pack in a text data storage area of the storage device in a predetermined order; and (d) replacing a part of the pack header read in step (b) with: Storing the fixed-length pack information in the identification information storage area of the storage device in a predetermined order; (e) inputting a reproduction request condition designating arbitrary text additional information; and (f) this step. Searching the identification information storage area of the storage device based on the reproduction request condition input in (e), and obtaining the pack information of the pack; and (g) obtaining the pack information in this step (f). Calculating the storage location of the specified text additional information in the text data storage area of the storage device based on the pack information; Characterized in that from the calculated storage position in g) and extracting the text additional information.

As a result, the identifier information in the music compact disc is rearranged, simplified and stored as pack information in the address information storage area, and a text character string is converted to a text independently of the identifier information. Since the data can be stored in the data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

A computer-readable recording medium on which the CD text reproducing program of the present invention is recorded is characterized in that at least one type of text additional information for music information recorded on at least one track includes a variable-length character string,
It consists of a delimiter code inserted between the variable-length character strings, and this text additional information is obtained from a music compact disc divided into a plurality of packs including a fixed-length character string to which a header is added and recorded. A computer storing a CD text reproduction program, comprising: reading the text additional information and temporarily storing the text additional information in a storage device; and extracting and reproducing the text additional information from the storage device in response to a reproduction request. In a readable recording medium, the header includes a type code of the text additional information recorded in the pack, and a track continuously attached to a track of music information corresponding to the text additional information recorded in the pack. A number code, a pack number code consecutively assigned to the pack, and the A character number code indicating the number of the character of the character string of the text additional information that is recorded in the first digit of the pack; and (a) a text data storage area in the storage device; Preparing an identification information storage area; and (b) sequentially reading the packs from the music compact disc;
(C) storing the fixed-length character string of the pack read in step (b) in a text data storage area of the storage device in a predetermined order; and (d) storing the fixed-length character string read in step (b). Storing a part of the pack header as fixed-length pack information in the identification information storage area of the storage device in a predetermined order; and (e) inputting a reproduction request condition for specifying arbitrary text additional information. And (f) searching the identification information storage area of the storage device based on the track number code and the data type code included in the reproduction request condition input in step (e), and (G) obtaining the pack number code and the character number code from the pack information obtained in step (f). Calculating the start address of the text data storage area of the storage device in which the text additional information is stored based on the pack number code and the character number code; and (h) calculating the start address of the text data storage area. Extracting the character string of the pack from the start address of the text data storage area; and (i) detecting the delimiter code of the text additional information from the character string extracted in step (g). , (J) repeating the extraction of the character string from the text data storage area of the storage device until the delimiter code is detected in step (i).

As a result, the identifier information in the compact disc for music is rearranged, simplified and stored as pack information in the address information storage area, and a text character string is converted to a text independently of the identifier information. Since the data can be stored in the data storage area in a row, it is possible to reduce the capacity of the storage device required for reading from the compact disk and storing the additional information.

In the recording medium storing the CD text reproducing program according to the present invention, the pack includes an error checking code, and the CD text reproducing program reads (k) the error checking code from the music compact disc, Determining a data reading error of the pack when reading the pack in the step (b) based on the error check code;
(L) storing the determination result in step (k) in the identification information storage area of the storage device while including the determination result in the pack information.

As a result, even if an error is detected when reading data from the compact disk, the error can be recovered.

The recording medium on which the CD text reproducing program of the present invention is recorded is characterized in that the CD text reproducing program is (m) next to the text additional information to be extracted according to the reproduction request conditions input in the step (e). Calculating, as a final address, an address immediately before a start address of the text data storage area of the storage device in which the text additional information is stored;
(N) setting an address when the delimiter code is detected in the step (i) as an end address;
(O) determining whether the final address calculated in step (m) is smaller than the end address obtained in step (n); and (p) determining the final address in step (o). Is determined to be smaller than the end address, the end address is replaced with the last address. This prevents end address extraction errors.

In the recording medium storing the CD text reproducing program of the present invention, the CD text reproducing program determines whether (q) the track number code extracted in the step (g) is continuous or not. And (r) complementing the track number code if it is determined in step (q) that the track number codes are not continuous. As a result, even if the track number is missing, the CD text data corresponding to the requested additional information can be reliably searched and reproduced.

In the recording medium on which the CD text reproducing program of the present invention is recorded, the text additional information may include a song title, an artist name, a lyricist name, a composer name, an arranger name, and a message. Further, the type code may identify a type of the text additional information. Further, the recording medium on which the CD text reproducing program of the present invention is recorded may further include a step of displaying the character string extracted in the step (h) by the CD text reproducing program.

[0070]

Embodiments of the present invention will be described below with reference to the drawings. In all the drawings, similar components are denoted by the same reference symbols and symbols.

The CD reproducing apparatus of the present invention is the same as the conventional CD reproducing apparatus 20 shown in FIG. 22, and has a lead-in area 3 of the compact disk for music 1 shown in FIG.
The reproduction of the additional information consisting of the text character string recorded in the. The configuration of the additional information recorded in the lead-in area 3 of the compact disc 1 is the same as the conventional configuration shown in FIG. In the present embodiment, the additional information recorded in the lead-in area 3 uses the example of the additional information shown in FIG. In this embodiment, the case where the lead-in area 3 includes one block will be described. However, the present invention is not limited to this, and may include a plurality of blocks.

The CD text storage method according to the first embodiment of the present invention
And reads the CD text in the
This is a CD text storage method capable of reducing the storage capacity of data temporarily stored in the AM 27. This temporary RA
The CD text data stored in M27 is read out when the additional information corresponding to the music information is reproduced in response to a reproduction request from the outside, and is displayed on the display unit 29 of the CD reproduction device 20.

FIG. 1 is a flowchart showing a processing procedure of the CD text storing method according to the first embodiment of the present invention. As shown in the figure, in the CD text storage method according to the first embodiment, in step S101, an address information storage area 43 in which an address table 41 is stored and a text data 9 are stored in the RAM 27 of the CD playback device 20. And a text data storage area 45 to be stored. As shown in FIG. 2, in the present embodiment, the initial value of the start address of the address table 41 stored in the address information storage area 43 is 0x0E00, and the start address of the text data 9 stored in the text data storage area 45. The initial value is 0x0200, but is not limited to this.

FIG. 3 shows a data configuration example of the address table 41 stored in the address information storage area 43. As shown in the figure, the address table 41 stores the first data HD1 for each table address corresponding to each pack.
And second data HD2 and third data HD3. The capacity of each data is 1 byte. That is, the capacity required to store the information of each pack is 3 bytes.

The data of the _0th pack P ₀ is stored at the address 0x0E00 of the RAM 27 and the first pack P ₁
Is stored at address 0x0E03, and the data of the n-th pack P _n is (address initial value 0x0E0
0 + 3 × n).

In the first data HD1, the lower 4 bits of the first identifier ID1 of the corresponding pack are set in the upper 4 bits, and the lower 4 bits of the first identifier HD1 of the corresponding pack are set in the lower 4 bits of HD1. Bit is set.
Here, the first identifier ID1 of the corresponding pack is, as described above, an identifier indicating the data type of the text character string stored in the pack.
8F (h), the lower 4 bits of the 2-byte data and the data type can be identified, so that only the lower 4 bits are employed. The data type includes a song title, artist name, lyricist name, composer name, arranger name, message, and the like. For example, the first identifier ID1 = 80 (h) indicates an album name or a song title.

The fourth identifier ID4 of the corresponding pack
Indicates which character of the text string corresponds to the first digit of the text data stored in the pack. In the present embodiment, the fourth identifier I
Only the lower 4 bits of D4 are used, and are used for processing described later.

In the second data HD2, the data of the second identifier ID2 of the corresponding pack is set. The second identifier ID2 of the corresponding pack is an identifier indicating the track number of the text data stored in the pack, and the 99th track at the maximum is included in one compact disc 1. Possible numerical values of the second identifier ID2 are 00 (h) to 63 (h). That is,
Since the track number can be identified by the lower 7 bits of the second identifier ID2, only the lower 7 bits are employed.
Further, the second data HD2 performs an error check on data read from the pack based on the most significant bit of the second data HD2 based on the CRC of the CRC unit 11 of the corresponding pack. 0 is set. In this embodiment, 1 is set when an error is detected and 0 is set when the error is normal. Conversely, 0 may be set when an error is detected and 1 may be set when the error is normal.

In the third data HD3, data of the third identifier ID3 of the corresponding pack is set. The third identifier ID3 of the corresponding pack is a serial number assigned to the pack. Since a maximum of 256 packs are included in one block, 00 (h) to FE are assigned to each block.
(H). This number is initialized for each block. The third data HD3 is stored in a RAM 27 described later.
Is used to calculate the address at which the text data in the pack is stored in the text data storage area 45 of FIG.

As described above, in the CD text storage method according to the present invention, the above-described first to third data includes, as area information of text data stored in each pack, a data type and a first digit character of the pack. Is information indicating the character of the text string, the text string including the first digit character of the pack is information indicating the information of the track (song), error information, And a pack number.

FIG. 4 shows that the text data storage area 45 has
23 illustrates an example when text data of additional information in the lead-in area 3 illustrated in FIG. 21 is stored. As shown in the drawing, the text data of each pack is stored in the text data storage area 45 in the order of the pack without any gap. Null indicated by a code “00” is used as a delimiter between the text character strings, and a code “20” is used as a space in the text character string.

Returning to FIG. 1, in step S102, the variable i
Is set to 0. Here, the variable i is used as an index of the pack number. Subsequent step S103
From the lead-in area 3 of the compact disc 1,
The data of the i-th pack Pi is read. In a succeeding step S104, the text data of the text data portion 9 of the read i-th pack Pi is read and stored in the text data storage area 45 of the RAM 27. Text data, starting from a given address in the text data storage area, the text data of the i-th pack P _i is (i-
1) The data of the pack P _i-1 is stored immediately after the data of the pack P _i-1 without any space.

In the following step S105, based on the identifier information of the header portion 7 of the read i-th pack Pi,
HD1 of the address table 41 is set. Specifically, the first part of the header part 7 of the read i-th pack Pi is
The lower 4 bits of the identifier ID1 are set to the upper 4 bits of HD1 of the address table 41, and the lower 4 bits of the fourth identifier ID4 of the header part 7 of the read i-th pack Pi are set to the lower 4 bits of HD1 of the address table 41. Set to.

In the subsequent step S106, the second identifier ID2 of the header portion 7 of the read i-th pack Pi is set in HD2 of the address table 41. Next, in step S107, the CRC of the read i-th pack P _i is read.
A CRC check is performed on the data read in step S103 based on the data of the unit 11, and it is determined whether a CRC error has been detected based on the result. If no error is detected in the determination in step S107, the process proceeds to step S108, and if an error is detected, the process proceeds to step S109.

[0085] At step S108, it sets the read i-th third identifier ID3 data of the header portion 7 of the pack P _i to HD3 of the address table 41. on the other hand,
In step S109, the data of the HD3 in the address table of the (i-1) -th pack P _i-1 previously read is read, and the value obtained by adding 1 to the read HD3 is used as the i-th pack. H of the address table 41 of P _i
Set as D3 data. Then, step S1
At 10, 1 is set to the upper 1 bit of HD 2 in the address table 41. Steps S108 and S110
Go to step S111, and in step S111, it is determined whether data has been read out to all the packs in the lead-in area 3. This determination is, for example,
The identifier ID1 indicating the data type of the information stored in the lead-in area 3 starts from 80 (h) and is sequentially 8F.
After reading up to (h), this is performed again when 80 (h) is detected.

When all the data has been read, the present processing is terminated. On the other hand, if not all data has been read, the process proceeds to step S112, where 1 is added to the variable i, and the process returns to step S103. In this way, the variable i is incremented sequentially from _0, and the processing of steps S103 to S111 is repeated for each pack sequentially from the _0th pack P0. As described above, a maximum of 256 packs are included in one block, and the lead-in area 3 includes a maximum of eight blocks. Although a case where a plurality of blocks are included is not described in the present embodiment, a plurality of blocks may be included.

The CD text storage method according to the first embodiment of the present invention shown in FIG. 1 shows an example of a processing routine of a CD text storage program recorded on a computer-readable recording medium. A CD text storage program according to the invention has the steps shown in FIG. The CD text storage program may be described in any programming language, and is recorded on a computer-readable recording medium in a computer-executable format. The control unit 25 of the CD playback device 20 performs a CD text storage process based on the steps described in the CD text storage program. In this embodiment, the procedure when the lead-in area 3 includes only one block is shown. However, the present invention is not limited to this, and the lead-in area 3 may include a plurality of blocks. good. The processing procedure in that case is in the category of design change.

Next, the operation of the CD text storing method according to the first embodiment of the present invention will be described with reference to the flowchart of FIG.

When the compact disc 1 is the CD player 2
0 is placed on the CD drive unit 21 of FIG.
D text storage processing is started.

In step S101, an address information storage area 43 for storing the address table 41 and a text data storage area 45 for storing the text data 9 are secured in the RAM 27 of the CD reproducing apparatus 20. The address initial value of 43 is set to 0x0E00, and the address initial value of the text data storage area 45 is set to 0x0200.

Next, the routine proceeds to step S102, where 0 is set to a variable i. Proceeding to step S103, the data of the _0th pack P0 of the 0th block B0 of the lead-in area 3 of the compact disc 1 is read. Proceeding to step S104, the read-out 0th pack P ₀
The code of the text character string stored in the text data part 9 is read. That is, the text character string display data “TEST DISK M
A code for 12 bytes corresponding to "O" is read.
The read code is stored in the RAM 27 as shown in FIG.
Address 0x0200 of the text data storage area 45
Are stored sequentially.

The process advances to step S105, where the code 80 of the first identifier ID1 of the header 7 of the _0th pack P ₀
(H) and the code 0 (h) of the fourth identifier ID4, the address 0x0E00 of the address table 41 is obtained.
Is set to 00 (h) as shown in FIG.

The flow advances to step S106 to code 00 (h) of the second identifier ID2 in the header of the _0th pack P0.
Is set in the second data HD2 of the address table 41.

[0094] Then, the process proceeds to step S107, based on the data of the 0-th pack P ₀ of the CRC unit 11, CRC check of the 0th data of the pack P ₀ read in step S103 is performed. Since no error was detected, the code 00 (h) of the third identifier ID3 of the header 7 of the _0th pack P0 is set in the third data HD3 of the address table 41 in step S108. Proceeding to step S111, since all data in the lead-in area 3 has not been read out,
Then, 1 is added to the variable i, i = 1, and the process returns to step S103.

In step S103, 1 of the 0th block B0 in the lead-in area 3 of the compact disc 1
Th pack P ₁ of the data is read. Step S
Proceeds to 104, read the first text string code stored in the text data portion 9 of the pack P ₁ has is read. That is, a 12-byte code corresponding to the text character string display data “NEY BATTERFR” shown in FIG. 21 is read. The read codes are stored in order from the address 0x020C in the text data storage area 45 of the RAM 27 as shown in FIG.

[0096] proceeds to step S105, the code 80 of the first first identifier ID1 of the header portion 7 of the pack P ₁
Based on (h) and the code 02 (h) of the fourth identifier ID4, the address 0x0E03 of the address table 41 is obtained.
Is set to 02 (h) as shown in FIG.

In step S106, the code 01 (h) of the second identifier ID2 in the header of the _first pack P1
Is set in the second data HD2 of the address table 41.

[0098] Then, the process proceeds to step S107, based on the data of the first pack P ₁ of the CRC unit 11, CRC check of the first pack P ₁ of the data read in step S103 is performed. Since no error was detected, the code 01 (h) of the third identifier ID3 of the header 7 of the _first pack P1 is set in the third data HD3 of the address table 41 in step S108.
Proceeding to step S111, since all data in the lead-in area 3 has not been read out,
Then, 1 is added to the variable i, i = 1, and the process returns to step S103.

In step S103, the second block B0 in the lead-in area 3 of the compact disc 1
Th of the pack P ₂ of the data is read. Step S
Proceeds to 104, reading the second text string of code stored in the text data portion 9 of the pack P ₂ has is read. That is, a 12-byte code corresponding to the text character string display data “Y MY ABC THE” shown in FIG. 21 is read. As shown in FIG. 4, the read codes are (1) to (0) of address 0x0218 of the text data storage area 45 of the RAM 27.
The data is sequentially stored at the position (12).

[0100] proceeds to step S105, the second first identifier ID1 of the header portion 7 of the pack P ₂ Code 80
(H) and the code 08 (h) of the fourth identifier ID4, the address 0x0E06 of the address table 41 is obtained.
Is set to 08 (h) as shown in FIG.

[0102] Proceeding to step S106, 2-th pack P ₂ code 02 of the second identifier ID2 in the header portion (h)
Is set in the second data HD2 of the address table 41.

[0102] Then, the process proceeds to step S107, based on the data of the second pack P ₂ of the CRC unit 11, the CRC check of the second data pack P ₂ read in step S103 is performed. In the present embodiment, it is assumed that an error has been detected in the data reading of the _second pack P2. Here, the process proceeds to step S109, where the data 01 of the HD3 in the address table of the _first pack P1 is stored.
(H) is read out, 1 is added to HD3, and the data is set as HD3 data of the _second pack P2. Proceeding to step S110, 1 is set to the first upper bit of the second data HD2 in the address table 41. That is, the second pack P ₂ corresponding to the HD2 of the address table 41, as shown in FIG. 5, 82 (h) are set. Proceeding to step S111, since all data in the lead-in area 3 has not been read out,
Proceeding to 112, 1 is added to the variable i, and i = 3,
It returns to step S103.

Thereafter, the above processing is repeated for each pack.
When the data of all the packs have been read, step S
With the determination of 111, the process exits.

As described above, according to the CD text storing method of the first embodiment of the present invention, the identifier information contained in the header section 7 of the lead-in area 3 in the compact disc 1 is rearranged, and the address table is simplified. 41,
In addition, since the text data of the text data section 9 can be stored in the text data storage area 45 independently of the identifier information, the information in the lead-in area 3 is read from the compact disc 1 and stored. The required capacity of the RAM 27 can be reduced.

FIG. 6 is a flowchart showing a processing procedure of the CD text reproducing method according to the second embodiment of the present invention. The CD text reproducing method according to the second embodiment of the present invention is a method for reproducing additional information corresponding to music information temporarily stored in the RAM 27 by the CD text storing method according to the first embodiment of the present invention. Also in this embodiment, the CD playback device is the same as the conventional CD playback device 20 shown in FIG. 22, and a text character string recorded in the lead-in area 3 of the music compact disc 1 shown in FIG. The additional information consisting of
The configuration of the additional information recorded in the lead-in area 3 of the compact disc 1 is the same as the conventional configuration shown in FIG. In the present embodiment, the additional information recorded in the lead-in area 3 uses the example of the additional information shown in FIG. In this embodiment, the lead-in area 3 includes only one block.

As shown in FIG. 6, the CD of the second embodiment
In the text reproducing method, in step S201, the control unit 25 sends, from the external data request unit 31, the first identifier ID1 indicating the data type corresponding to the text character string of the additional information to be reproduced and the second identifier ID2 indicating the track number. A text data request including a is received. After inputting the first identifier ID1 and the second identifier ID2, the process proceeds to step S202, and the first identifier ID1 and the second identifier
The address table 41 is searched based on the identifier ID2 to obtain the corresponding data. Subsequent step S20
3, the retrieved first data HD1 and third data H
Based on D3, a start address at which the corresponding text character string is stored in the text data storage area 45 is calculated. Here, the start address is calculated by the following equation (2
Calculate in a).

Start address = address initial value + (HD3) × 12− (lower 4 bits of HD1) Expression (2a) In the present embodiment, the address initial value is 0x0200. In the above equation (2a), the pack number is multiplied by the text code capacity of 12 bytes included in one pack, the initial address value is added, and the number of leading digits of the pack is subtracted. Start address is calculated.

In the present embodiment, the absolute value address is corrected when the start address is calculated. However, this correction process may be performed immediately before the text data is extracted in step S207. In that case, each address is handled by a relative value until the absolute value address is calculated.

The operation proceeds to step S204, and step S20
The start address calculated in step 3 is used as a temporary address, and it is determined whether or not the text data code stored in the temporary address is NULL (00 (h)). NUL
If it is not L, the process proceeds to step S205, and NULL
In the case of, the process proceeds to step S206.

In step S205, 1 is added to the temporary address, and the flow returns to step S204. As a result, it is detected whether or not the code of the text data stored in the temporary address from the start address is NULL.

In step S206, step S205
Is determined as an end address. Proceeding to step S207, step S203
The text data between the start address calculated in step S206 and the end address determined in step S206 is extracted from the text data storage area 45, and the process ends. Thereby, a text character string corresponding to the request from the external data requesting unit 31 is extracted. The text string thus extracted is displayed on the display unit 29 by the control unit 25.

Next, the operation of the CD text reproducing method according to the second embodiment will be described with reference to FIG.

Here, a case will be described in which the external data requesting unit 31 requests the control unit 25 to display the title of the first music piece. In step S201,
ID1 = 80 (h) and ID2 = 01 (h) are input in response to a request from the external data request unit 31. In step S202, the address table is searched to extract data satisfying the conditions of ID1 and ID2 input in step S201. Here, ID1 = 80 (h)
Therefore, the lower 4 bits of HD1 are 0 (h) and I
Since D2 = 01 (h), the lower 7 bits of HD2 are 01
Since the data of (h) satisfies the condition, the address 0x0E03 of the address table 41 corresponds.

The flow advances to step S203, where the first data HD1 = 0 of the address 0x0E03 in the address table 41 is set.
x02 and the third data HD3 = 0x01,
The start address at which the corresponding text character string is stored in the text data storage area 45 is calculated as follows.

Start address = 0x0200 + 1 × 1
2-2 = 0x020A The process proceeds to step S204, and the code of the text data stored at the corresponding address is set to NULL (00) in order from the start address calculated at step S203.
(H)) is determined. Here, as shown in FIG. 4, the address 0x020 of the text data storage area 45 is set.
Since the data of A is “M” and not NULL,
Proceeding to step S205, 1 is added to the address and 0
The process returns to step S204 as x020B. In steps S204 and S205, if the address is sequentially increased by one and NULL detection is performed, the address 0x020
At F, NULL is detected. Therefore, step S
From step 204, the process proceeds to step S206, where the end address 0
x020F is determined. Next, the process proceeds to step S207, where the text data “MONEY” between the start address calculated in step S203 and the end address determined in step S206 is extracted from the text data storage area 45, and the process ends. Thereby, the text character string “MONEY”, which is the title of the first music piece, according to the request from the external data requesting unit 31 is extracted. The text character string “MONEY” extracted as described above is displayed on the display unit 29 by the control unit 25.

As described above, according to the second embodiment of the present invention, C
The D text reproducing method can reproduce necessary CD text data based on information temporarily stored in the small-capacity RAM 27.

FIGS. 7 and 8 are flowcharts showing the processing procedure of the CD text reproducing method according to the third embodiment of the present invention. The CD text reproducing method according to the third embodiment of the present invention includes, as another example of the CD text reproducing method according to the second embodiment, a CRC error process when a CRC error is detected.

As shown in FIG. 7, the CD of the third embodiment
The text reproduction method is the same as that of the second embodiment shown in FIG.
Steps S201 and S202 same as D text reproducing method
And S204 to S207, and step S301 of a CRC error processing routine instead of step S203 of the CD text reproducing method of the second embodiment. The description of the same steps as in the CD text reproducing method of the second embodiment is omitted.

In FIG. 7, when the process proceeds to step S301 after step S202, the process proceeds to a CRC error processing routine shown in FIG. When control returns from the CRC error processing routine, the process proceeds to step S204.

FIG. 8 is a flowchart showing a procedure of a CRC error processing routine of the CD text reproducing method according to the third embodiment. As shown in FIG.
Then, it is determined whether or not there is a CRC error based on the CRC error check result of the data of the pack corresponding to the address table 41 searched in the step S202 in FIG. Specifically, it is determined whether or not the most significant bit of the HD2 is “1”. In the case of a CRC error, step S303
If not, the process proceeds to step S304.

At step S303, step S of FIG.
Based on the third data HD3 of the address immediately before the address of the address table 41 searched in 202, a temporary address is calculated by the following equation (3a). The immediately preceding address is calculated by subtracting 3 from the address in the address table searched in step S202.

Temporary address = address initial value + (HD3) × 12 Expression (3a) The process of calculating the temporary address at the time of the CRC error in step S303 is not particularly limited and may be omitted.

At step S305, the lower 4 bits of the first data HD1 of the address in the address table 41 searched at step S202 of FIG.
In the case of (h) to B (h), the process proceeds to step S306, and C
In the case of (h) to F (h), the process proceeds to step S307.

In step S306, step S303
The byte of the text data stored in the temporary address is added to the temporary address calculated in
It is determined whether or not the address is UL (00 (h)), and one byte is further added to the temporary address where NULL is detected, to obtain a start address.

Temporary address = initial address value + (HD3) × 12 Expression (3a) In step S307, the code of the text data stored in the temporary address is subtracted by one byte from the temporary address calculated in step S303. But NULL
It is determined whether (00 (h)) or not, and 1 is further added to the temporary address where NULL is detected, to obtain a start address.

In step S304, calculation is made by the following equation (3b).

Start address = address initial value + (HD3) × 12− (lower 4 bits of HD1) Expression (3b) When the processing of steps S304, S306 and S307 is completed, the process returns to step S204 of the processing routine of FIG.

Next, the operation of the CD text reproducing method according to the third embodiment will be described with reference to FIGS.

Here, a case will be described in which the external data requesting unit 31 requests the control unit 25 to display the title of the second music piece. In step S201, ID1 = 80 (h) and ID2 = 02 (h) are input in response to a request from the external data requesting unit 31. In step S202, the address table is searched to extract data satisfying the conditions of ID1 and ID2 input in step S201. Here, ID1 = 80
(H), the lower 4 bits of HD1 are 0 (h) and ID2 = 02 (h), so that the data whose lower 7 bits of HD2 are 02 (h) satisfies the condition. Address 0x0E06 corresponds. Proceeding to step S301, the process moves to step S302 of the CRC error processing routine shown in FIG.

In step S302, it is determined whether or not a CRC error has occurred based on whether or not the most significant bit of the HD2 is 1. Here, HD2 at address 0x0E06
Since the most significant bit of is “1”, the process proceeds to step S303.
In step S303, 3 is subtracted from the address 0x0E06 in the address table 41 searched in step S202 in FIG. 7 to obtain 0x0E03. The third data HD3 at the address 0x0E03 is 01 (h) as shown in FIG.

Based on the third data HD3, a temporary address is calculated by the above equation (3a). Temporary address =
0x0200 + 1x12 = 0x020C Step S30
Proceeding to step 5, the lower 4 bits of the first data HD1 at the address 0x0E06 are examined. Here, address 0
Since the lower 4 bits of HD1 of x0E06 are 8 (h), the process proceeds to step S306.

In step S306, step S303
It is determined whether the code of the text data stored in the temporary address is NULL (00 (h)) by adding one byte at a time to the temporary address 0x020C calculated in step (1).
Specifically, as shown in FIG. 4, the data at the address 0x020C in the text data storage area 45 is "N" and not NULL, so that one byte is added to the temporary address and the data at that address is examined as 0x020D. . The tentative address is sequentially increased by one byte, and NU
When LL detection is performed, when address 0x020F, NU
LL is detected. One byte is added to the temporary address where NULL is detected, and the start address 0x021 is added.
0 is determined.

Thus, the CRC error processing routine is ended, and the process returns to step S204 in FIG. 7, where the code of the text data stored at the corresponding address is NULL (00) in order from the previously calculated start address.
(H)) is determined. Here, as shown in the part 4, the address 0x021 of the text data storage area 45 is set.
Since the data of 0 is “B” and is not NULL,
Proceeding to step S205, 1 is added to the address and 0
The process returns to step S204 as x0211. In steps S204 and S205, if the address is sequentially increased by one byte and NULL detection is performed, the address 0x0
At 219, NULL is detected. Therefore, the process proceeds from step S204 to step S206, and the end address 0x0219 is determined.

Next, the process proceeds to step S207, where the text data "BATTERFRY" between the start address calculated in step S203 and the end address determined in step S206 is stored in the text data storage area 4.
5 and the process ends. As a result, the text character string “BATTERFRY”, which is the title of the second song, according to the request from the external data requesting unit 31 is extracted. The text character string “BATTERRY” extracted in this manner is displayed on the display unit 29 by the control unit 25.

As described above, according to the third embodiment of the present invention, C
The D text reproducing method can reproduce necessary CD text data even if the information temporarily stored in the small-capacity RAM 27 has a CRC error at the time of reading.

FIG. 9 is a flowchart showing a processing procedure of the CD text reproducing method according to the fourth embodiment of the present invention. The CD text reproducing method according to the fourth embodiment of the present invention includes, as another example of the CD text reproducing method according to the second embodiment, an end address protection process for preventing a mistake in extracting an end address.

As shown in FIG. 9, the CD of the fourth embodiment
The text reproduction method is the same as that of the second embodiment shown in FIG.
Steps S201 to S207 same as D text reproducing method
And step S401 of the end address protection processing routine before step S207. The description of the same steps as in the CD text reproducing method of the second embodiment is omitted.

In FIG. 9, when the process proceeds from step S206 to step S401, the process proceeds to the end address protection processing routine shown in FIG. FIG. 10 is a flowchart showing a procedure of an end address protection processing routine of the CD text reproducing method according to the fourth embodiment. As shown in the drawing, in step S402, step S2 in FIG.
It is determined whether ID2 input at 01 is the last track. Here, whether or not the track is the last track is determined by
This is performed based on the information of the subcode Q described in the lead-in area 3. If the input ID2 is the last track, the process proceeds to step S403; otherwise, the process proceeds to step S404.

In step S403, the final address is calculated by the following equation (4a). Here, the final address is set as a temporary end address on the assumption that the end address is not detected due to, for example, an error when reading the pack, and the final address of the text information included in the pack is assumed. This is the address immediately before the start address of the next information.

Final address = (next HD3) × 12− (lower 4 bits of next HD1) −1 Expression (4a) Here, (next HD1) and (next HD3) are the addresses searched in step S202. It means the data HD1 and HD3 of the address next to the address in the table 41. That is, they are the data HD1 and HD3 of the address obtained by adding 3 bytes to the address of the address table 41 searched in step S202.

In step S404, the final address is calculated by the following equation (4b).

Final address = (next HD3) × 12− (lower 4 bits of next HD1) − ((lower 7 bits of next HD2) − (lower 7 bits of current HD2)) Expression (4b) where (4b) Next HD2) is data HD2 of the address next to the address of the address table 41 searched in step S202. That is, it is the data HD2 of the address obtained by adding 3 bytes to the address of the address table 41 searched in step S202. (Current HD2) is the data HD2 of the address in the address table 41 searched in step S202.

In steps S403 and S404, the process proceeds to step S405, where the end address calculated in step S206 of FIG. 9 is compared with the final address calculated in step S403 or S404.
If the end address is larger than the last address, the process proceeds to step S406. If the end address is smaller than the last address, the process ends, and the process returns to step S207 in FIG.

In step S406, step S4
03 or the final address calculated in S404.
Is updated by replacing the end address calculated in step S206. Thereafter, this processing routine ends, and the process returns to step S207 in FIG.

The operation of the CD text reproducing method according to the fourth embodiment will be described in connection with the CD text reproducing method according to the seventh embodiment described later.

FIG. 11 shows a CD according to the fifth embodiment of the present invention.
It is a flowchart which shows the processing procedure of a text reproduction method. The CD text reproducing method according to the fifth embodiment of the present invention is different from the CD text reproducing method according to the fourth embodiment in that an end address protection process for preventing a mistake in extraction of an end address is performed according to the third embodiment. It further includes a CRC error process of the CD text reproducing method.

As shown in FIG. 11, C in the fifth embodiment
The D text reproducing method is the same as steps S201 to S20 as the CD text reproducing method of the second embodiment shown in FIG.
7, and before step S207, step S207 of the end address protection processing routine with CRC error countermeasures.
501. The description of the same steps as in the CD text reproducing method of the second embodiment is omitted.

Referring to FIG. 11, when the process proceeds from step S206 to step S501, the process proceeds to an end address protection processing routine with a countermeasure against a CRC error shown in FIG. FIG. 12 is a flowchart showing a procedure of an end address protection processing routine with a countermeasure against a CRC error in the CD text reproducing method according to the fifth embodiment.
2 and S503, and includes steps S402 to S406 of the CRC error processing routine of FIG. This figure 1
Description of the same steps as those of the CRC error processing routine of 0 is omitted.

Referring to FIG. 12, in step S502,
The address next to the address of the address table 41 (hereinafter, referred to as “current table address”) searched in step S202 in FIG. 11 (hereinafter, “next table address”)
Call. Check whether there is a CRC error. The next table address is calculated by adding 3 bytes to the current table address. The presence or absence of a CRC error is determined based on whether the most significant bit of the data HD2 of the next table address is 1.

If a CRC error has been detected, the process proceeds to step S503. If no error has been detected, the process proceeds to step S503.
Proceed to step S402. Step S402 and subsequent steps are the same as the CRC error processing routine of the CD text reproducing method of the fourth embodiment shown in FIG.

In step S503, the final address is calculated by the following equation (5a).

Final address = (next HD3) × 12-1 Expression (5a) The process proceeds from step S503 to step S405, and based on the final address calculated in step S503, S403, or S404, in step S405, FIG. The end address is compared with the end address calculated in step S206. If the end address is larger than the last address, the process proceeds to step S406, where the end address is replaced with the last address. This ends the processing routine and returns to step S207 in FIG.

The operation of the CD text reproducing method according to the fifth embodiment will be described in connection with the CD text reproducing method according to the seventh embodiment described later.

FIGS. 13 to 16 are flowcharts showing the processing procedure of the CD text reproducing method according to the sixth embodiment of the present invention. The CD text reproducing method according to the sixth embodiment of the present invention is different from the CD text reproducing method according to the second embodiment in that additional information of three or more tracks is included in one pack. And a track number complementing process for preventing the text data from being undetectable due to the skipping of the track number occurring in the process.

As shown in FIG. 13, C in the sixth embodiment
The D text reproducing method is the same as steps S201 and S20 as the CD text reproducing method of the second embodiment shown in FIG.
Steps S601 to S603 are included in addition to steps S601 to S207. The description of the same steps as in the CD text reproducing method of the second embodiment is omitted.

In FIG. 13, the process proceeds from step S201 to step S601, and based on the first identifier ID1 and the second identifier ID2 input in step S201,
The address table 41 is searched to determine whether or not there is corresponding data. For details, see the address table 41
Is the same as the lower 4 bits of the input first identifier ID1 and the same as the second identifier ID2 of the address table 41 to which the lower 7 bits of the second data HD2 are input. Search for an address. If there is such data, the process proceeds to step S602; otherwise, the process proceeds to step S603.

In step S602, the address of the address table 41 having the corresponding data is obtained as the current table address. In step S603, the process proceeds to a track number complementing process routine shown in FIG. When the control returns from the track number complementing processing routine of step S603, the present processing ends.

FIG. 14 is a flowchart showing a procedure of a track number complementing processing routine of the CD text reproducing method according to the sixth embodiment. As shown in FIG.
At 604, 1 is set to a counter i. Here, the counter i sets the address value to 1 when searching for a table address in the address table 41 in the following steps.
Corresponds to the number to be added byte by byte. This addition number is
The maximum number of bytes that can be added may be determined in advance as a limit value. In the present embodiment, a case where the limit is set will be described. That is, the process proceeds to step S605, and it is determined whether or not the counter i has exceeded the limit value. If so, the process proceeds to step S606; otherwise, the process proceeds to step S607.

In step S606, it is determined that the corresponding table address does not exist in the address table 41, the control unit 25 is notified that there is no corresponding text data, and the processing routine ends.

In step S607, ID2 input in step S201 of FIG. 13 is set as the search target track number, and 1 is added to the track number to search for the next track number.

Proceeding to step S608, step S60
The lower 7 bits of HD2 in the address table 41 corresponding to the track number calculated in 7 search for the same address as the ID2 data. When HD2 data corresponding to ID2 data is detected, the process proceeds to step S609, and when not detected, the process returns to step S605.

In step S609, step S608
Then, a table address at which the corresponding HD2 data is detected (hereinafter, referred to as “temporary table address”) is obtained. The process advances to step S610 to acquire CRC error information of the temporary table address acquired in step S609. That is, the data of the most significant bit of HD2 of the table address is obtained.

In step S611, the flow shifts to the start address search routine shown in FIG. When the control returns from the start address search routine, step S61 is executed.
Then, the process proceeds to an end address search routine shown in FIG. When the control returns from the end address search routine, the present processing routine ends, and the control returns to FIG.

FIG. 15 is a flowchart showing a procedure of a start address search routine in the track number complementing process of the CD text reproducing method according to the sixth embodiment.

In step S621, based on the data of the temporary table address obtained in step S609 of FIG. 14, a range for searching for the start address is set by the following equations (6a) and (6b).

First address = address initial value + ((HD3) × 12− (lower 4 bits of HD1) −2) Expression (6a) Second address = address initial value + ((HD3) × 12-11) Equation (6b) Here, the initial address is set in the text data storage area 4
The initial value of 5 is 0x0200.

The process proceeds to step S622 and proceeds to step S62.
The first address calculated in 1 is a temporary address. Proceeding to step S623, the tentative address is changed to step S621.
It is determined whether or not it is equal to or greater than the second address calculated in. If the temporary address is smaller than the second address, step S
Proceed to 624. If the temporary address is equal to or larger than the second address, the process proceeds to step S625, and it is determined whether the code of the temporary address in the text data storage area 45 is NULL. When NULL is detected, the process proceeds to step S626, and 1 is added to the count value C of the number of NULL. The initial value of the count value C is 0. If NULL is not detected in the determination in step S625, the process proceeds to step S625.
The process advances to 627, minus one byte from the temporary address, and returns to step S623. The step S626 proceeds to a step S628, in which it is determined whether or not the count value C is larger than the counter i. If the count value C is equal to or smaller than the counter i, the process returns to step S627. If the count value C is larger than the counter i, the process proceeds to step S629. In step S629, a value obtained by adding one byte to the temporary address is set as a start address. Step S624 or S6
When the start address is determined in step 29, the present processing routine ends, and the process returns to the track number complementing processing routine of FIG.

FIG. 16 is a flowchart showing the procedure of an end address search routine in the track number complementing process of the CD text reproducing method according to the sixth embodiment.

In the figure, in a step S631, the start address acquired in the start address search routine of FIG. 15 is set to a temporary address. Step S63
Then, the process proceeds to 2 to determine whether or not the code of the temporary address in the text data storage area 45 is NULL. If it is not NULL, the process proceeds to step S633, 1 is added to the temporary address, and the process returns to step S632. In the case of NULL, the process proceeds to step S634, and the temporary address is set as the end address.

Proceeding to step S635, based on the CRC error information obtained in step S610 of FIG.
An RC error is detected. If a CRC error has been detected, the flow advances to step S636 to calculate the final address using the following equation (6c). Here, the search HD3 is the HD3 data of the table address acquired in step S609 of FIG.

Last address = address initial value + (search H)
D3) × 12-1 Expression (6c) On the other hand, if no error is detected, the process proceeds to step S637, and the final address is calculated by the following expression (6d).

Final address = address initial value + (search HD3) × 12− (lower 4 bits of search HD1) Expression (6d) Step S636 or S637 to Step S638
The process proceeds to step S634, where the end address obtained in step S634 is compared with the final address calculated in step S636 or S637. If the end address is larger, the process proceeds to step S693. If the final address is equal to or smaller than the end address, This processing routine ends, and the process returns to the track number complementing processing routine of FIG. In step S639, the end address obtained in step S634 is replaced with the end address calculated in step S636 or S637, the end address search routine ends, and the process returns to the track number complementing processing routine in FIG.

The operation of the CD text reproducing method according to the sixth embodiment will be described in connection with a CD text reproducing method according to a seventh embodiment described later.

FIG. 17 shows a CD according to the seventh embodiment of the present invention.
It is a flowchart which shows the processing procedure of a text reproduction method. The CD text reproducing method according to the seventh embodiment of the present invention is different from the CD text reproducing method according to the sixth embodiment in that the track number complementing process includes the CRC error process according to the third embodiment, The end address protection processing with a CRC error countermeasure of the fifth embodiment is included.

As shown in FIG. 17, C in the seventh embodiment
The D text reproducing method is the same as the steps S201 and S2 in the CD text reproducing method of the sixth embodiment shown in FIG.
04 to S207, S601 to S603, the same step S301 as the CD text reproducing method of the third embodiment,
It includes the same step S501 as in the CD text reproducing method of the fifth embodiment. The description of the same steps as in the CD text reproducing method of each embodiment is omitted.

In FIG. 17, after step S602,
The process proceeds to step S301 and shifts to a CRC error processing routine shown in FIG. When control returns from the CRC error processing routine, the process proceeds to step S204.

After step S206 in FIG. 17, the flow advances to step S501 to shift to an end address protection processing routine with measures against CRC errors shown in FIG. This C
When the control returns from the end address protection processing routine with an RC error countermeasure, the process proceeds to step S207.

Next, the operation of the CD text reproducing method according to the seventh embodiment will be described with reference to FIGS. 17, 8, 12, 14 to 16, and 5.

Here, a case will be described in which the external data requesting unit 31 requests the control unit 25 to display the title of the third music piece. In step S201, the first identifier ID1 = 80 (h) and the second identifier I
D2 = 03 (h) is input in response to a request from the external data request unit 31. Proceeding to step S601, step S601
Based on the first identifier ID1 = 80 (h) and the second identifier ID2 = 03 (h) input in 201, the address table 41 of FIG. 5 is searched to determine whether there is corresponding data. . That is, (the upper 4 bits of HD1 = 0 (h)) and (the lower 7 bits of HD2 = 03)
An address that satisfies the condition of (h)) is searched. In the address table 41 according to the present embodiment, there is no address that satisfies the above condition, and thus the process proceeds to step S603.

In the step S603, the process shifts to a track number complementing processing routine shown in FIG. Step S
At 604, a counter i = 1 is set. Step S
At 605, it is determined whether the counter i is equal to or greater than the limit value. In the present embodiment, the limit value is set to 11, and the counter i is smaller than the limit value, so that the process proceeds to step S607. In step S607, the ID = 03 (h) input in step S201 of FIG. 17 is set as the search target track number, and 1 is added to the track number in order to search for the next track number. That is, track number = 4. Proceeding to step S608, an address corresponding to ID2 data = 04 (h) in the address table 41 corresponding to the track number calculated in step S607 is searched. That is, the HD of the address table 41 of FIG.
The address whose lower 7 bits of 2 are 04 (h) is searched. Here, the address 0x of the address table 41
Since there is HD2 data corresponding to 0E09, the process proceeds to step S609, and temporary table address = 0x0E09 is obtained.

The process advances to step S610 to go to step S60.
Temporary table address acquired in 9 = CR of 0x0E09
C error information, that is, the most significant bit data “0” of HD2 is obtained.

The flow advances to step S611 to shift to a start address search routine shown in FIG. In step S621 in FIG. 15, based on the data of the temporary table address = 0x0E09 obtained in step S609 in FIG. 14, the range for searching the start address is set by the above equations (6a) and (6b).

First address = 0x0200 + (03 (h) × 12-3 (h)) = 0x0221 (h) Second address = 0x0200 + (03 (h) × 12-11) = 0x0219 (h) Go to step S622 The first address 0x021E (h) calculated in step S621 is set as a temporary address. Proceeding to step S623, the tentative address is the second address 0x0219 (h) calculated in step S621.
It is determined whether it is greater than. Temporary address 0x0221
Since (h) is equal to or greater than the second address 0x0219 (h), the process proceeds to step S625. It is checked whether or not the code at the temporary address 0x0221 (h) in the text data storage area 45 in FIG. 4 is NULL. Since the position indicated by (10) in FIG. 4 corresponds to the temporary address 0x0221 (h), the code of the address is “T”, so that NU
Since it is not LL, the process proceeds to step S627.

In step S672, the temporary address is subtracted by one byte, and the temporary address is set to 0x021D (h). Returning to step S623, the tentative address is compared with the second address, and the tentative address 0x0220 (h)> second
Since the address is 0x0219 (h), step S6
Proceed to 25. In step S625, it is checked whether or not the code (9) at the address 0x0220 (h) of the text data storage area 45 in FIG. 4 is NULL.
Proceed to step S626.

In step S626, 1 is added to the count value C of the NULL number, and C = 1. Step S
The process proceeds to 628, where C> i is determined. Since C = i = 1, the process returns to step S627.

In step S627, the temporary address is subtracted by one byte to obtain 0x021F, and in step S623
Is larger than the second address 0x0219 (h), the process proceeds to step S625, and the code “C” at the address 0x021F of the text data storage area 45 in FIG.
Therefore, the process proceeds to step S627. Thereafter, the temporary address is sequentially reduced by one byte, and the second address 0x0
Null is searched in the range up to 219.

The code of the address 0x0219 indicated by (2) in the text data storage area 45 in FIG.
Since it is LL, when the temporary address is 0x0219, the process proceeds to step S626 in the determination of step S625, and 1 is added to the counter value C to become 2. Step S628
Since C = 2 and i = 1, the condition of C> i is satisfied, so the process proceeds to step S629, where the start address is
It is determined to be 0x021A obtained by adding 1 to the temporary address 0x0219.

With the above, the start address search routine ends, the process returns to the track number complementing process routine of FIG. 14, proceeds to step S612, and the process shifts to the end address search routine of FIG.

In step S631 of the end address search routine in FIG. 16, the start address 0 obtained above is obtained.
x021A is set to the temporary address. Step S6
Proceeding to 32, it is determined whether the code of the temporary address in the text data storage area 45 is NULL. As shown in FIG. 4, the address 0x021 of the text data storage area 45
Since the code (3) of A is “M” and is not NULL, the process proceeds to step S633. One is added to the temporary address to obtain 0x021B, and the process returns to step S632. As described above, the codes in the text data storage area 45 are sequentially examined to search for NULL. At the address 0x0220 at the position of the code (9) in the text data storage area 45 in FIG. 4, NULL is detected in step S632, and the process proceeds to step S634. This temporary address 0 is used as the end address.
x0220 is set.

Next, the process proceeds to step S635, and FIG.
The CRC error is detected based on the CRC error information obtained in step S610. Since no CRC error has been detected, the process proceeds to step S637, and the final address is calculated by the above equation (6d). As shown in FIG. 5, H of the previously acquired table address 0x0E09
D3 is 03 (h) and the lower 4 bits of HD1 are 03
(H).

Last address = 0x0200 + 03 (h)
× 12-03 (h) = 0x0221 The process proceeds from step S637 to step S638, where the end address 0x0220 obtained in step S634 and the above-mentioned final address 0
Compared with x0221, since the last address is larger, this processing ends, and the process returns to the track number complementing processing routine of FIG. The track number complementing processing routine in FIG. 14 is also ended, and the process returns to step S207 in FIG. The obtained start address 0x021A and end address 0x0
Based on 220, the text data “MY ABC” is extracted from the text data storage area 45, and this processing ends. Thereby, the text character string “MYABC”, which is the title of the third piece of music, according to the request from the external data requesting unit 31 is extracted. The text character string “MY ABC” extracted in this manner is displayed on the display unit 29 by the control unit 25.

As described above, according to the seventh embodiment of the present invention, C
The D text playback method includes a CRC error process, an end address protection process with CRC error countermeasures, and a track number complementing process. Therefore, even if a track number is missing, if a CRC error occurs, However, the CD text data corresponding to the requested additional information can be reliably retrieved and reproduced.

[0193]

As described above, the present invention rearranges, simplifies, and temporarily stores the CD text information read from the compact disk to temporarily store the CD text information in the storage device of the CD playback device. CD text storing and reproducing method, compact disk reproducing apparatus, and CD text having excellent effects of reducing errors and having a means for recovering an error even when an error is detected at the time of reading data from a compact disk. It is possible to provide a recording medium on which a storage and reproduction program is recorded.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a processing procedure of a CD text storage method according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of area allocation of a storage device of a CD reproducing apparatus according to the CD text storing method of FIG. 1;

FIG. 3 is a diagram showing a data configuration of an address table area of the storage device of FIG. 2;

FIG. 4 is a diagram showing an example of a data arrangement in a text data storage area of the storage device of FIG. 2;

FIG. 5 is a diagram showing an example of data arrangement in an address table area of the storage device of FIG. 3;

FIG. 6 is a flowchart showing a processing procedure of a CD text reproducing method according to a second embodiment of the present invention;

FIG. 7 is a flowchart showing a processing procedure of a CD text reproducing method according to a third embodiment of the present invention;

8 is a flowchart showing a processing procedure of a CRC error processing routine of the CD text reproducing method of FIG. 7;

FIG. 9 is a flowchart showing a processing procedure of a CD text reproducing method according to a fourth embodiment of the present invention.

10 is a flowchart showing a processing procedure of an end address protection processing routine of the CD text reproducing method of FIG. 9;

FIG. 11 is a flowchart showing a processing procedure of a CD text reproducing method according to a fifth embodiment of the present invention.

FIG. 12 is a flowchart showing a processing procedure of an end address protection processing routine with a CRC error countermeasure in the CD text reproducing method of FIG. 11;

FIG. 13 is a flowchart showing a processing procedure of a CD text reproducing method according to a sixth embodiment of the present invention.

14 is a flowchart showing a processing procedure of a track number complementing processing routine of the CD text reproducing method of FIG.

15 is a flowchart showing a processing procedure of a start address search processing routine of a track number complementing processing routine of the CD text reproducing method of FIG.

16 is a flowchart showing a processing procedure of an end address search processing routine of a track number complement processing routine of the CD text reproducing method of FIG.

FIG. 17 is a flowchart showing a processing procedure of a CD text reproducing method according to a seventh embodiment of the present invention;

FIG. 18 is a format diagram of a general music compact disc.

FIG. 19 is an internal configuration diagram of a lead-in area of a general music compact disc.

FIG. 20 is a list showing an example of additional information recorded on a compact disc for music.

FIG. 21 is a block diagram showing a storage example of additional information recorded in a lead-in area of a compact disc for music.

FIG. 22 is a block diagram of a recording and reproducing apparatus for a general music compact disc.

FIG. 23 is a flowchart showing a procedure of a conventional CD text reproducing method.

FIG. 24 is a diagram showing an example of data storage in a storage device of a conventional CD reproducing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compact disc 3 Lead-in area 5 Music information area P pack 7 Header part 9 Text data part (fixed-length character string) 11 CRC part (error check code) 21 CD drive part 23 Signal processing part 25 Control part 27 RAM (Storage device) 29 display section 31 external data requesting means 41 address table 43 address table storage area (identification information storage area) 45 text data storage area

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yutaka Hino 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. F term (reference) 5D044 AB05 AB09 BC03 CC04 DE03 DE12 DE18 DE70 GK12 HL04 5D077 AA26 AA40 BA08 CA02 DC12 DC21 DC40 HA07 HC05 HC50

Claims (29)

[Claims] 1. A method according to claim 1, wherein at least one type of text additional information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added, and recorded from a compact disc for music. In order to reproduce information, a CD text storage method for reading out the text additional information from the music compact disc and temporarily storing the text additional information in a storage device includes: (a) storing a text data storage area in the storage device; Preparing a storage area; (b) sequentially reading the packs from the music compact disc; and (c) storing the fixed-length character strings of the packs read in this step (b) in the storage device. And (d) reading in the step (b) in the text data storage area in a predetermined order. Storing a part of the header of the pack as fixed-length pack information in the identification information storage area of the storage device in a predetermined order. 2. The method according to claim 1, wherein the pack includes an error check code, wherein the CD text storing method includes: (e) obtaining the error check code of the pack read in the step (b); and (f) the step. (B) determining a data read error of the pack based on the error check code acquired in step (e) when reading the pack; and (g) determining the result of step (f). Storing the CD text in the identification information storage area of the storage device while including the pack information in the pack information. 3. In the step (d), the pack information is stored in the identification information storage area of the storage device such that the capacity of the storage device is smaller than the capacity of the CD text area of the music compact disc. 3. The CD text storing method according to claim 1, wherein the CD text is stored. 4. The text additional information includes a song title, an artist name, a lyricist name, a composer name, an arranger name, and a message, and the type code identifies a type of the text additional information. 4. The CD text storage method according to claim 1, wherein: 5. The method according to claim 1, wherein at least one type of text additional information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added, and recorded from the compact disk for music. Reading the information and temporarily storing it in a storage device;
Extracting the text additional information from the storage device in response to a reproduction request and reproducing the text additional information. (A) A text data storage area and an identification information storage area are stored in the storage device. Preparing; (b) sequentially reading the packs from the music compact disc; and (c) storing the fixed-length character strings of the packs read in this step (b) in text data of the storage device. (D) storing a part of the header of the pack read in step (b) as fixed-length pack information in the identification information storage area of the storage device in a predetermined order; (E) inputting a reproduction request condition for specifying arbitrary text additional information; and (f)
Searching the identification information storage area of the storage device based on the reproduction request condition input in step (e), and acquiring the pack information of the pack;
(G) calculating a storage position of the specified text additional information in the text data storage area of the storage device based on the pack information acquired in step (f); ) Extracting the text additional information from the storage position calculated in step (c). 6. At least one type of text additional information for music information recorded on at least one track includes a variable length character string and a delimiter code inserted between the variable length character strings. The additional information is
Reading the text additional information from a music compact disc divided into a plurality of packs including a fixed-length character string to which a header is added, and temporarily storing the text additional information in a storage device; Extracting the text additional information from the storage device and reproducing the text additional information, wherein the header comprises: a type code of the text additional information recorded in the pack; and a text recorded in the pack. A track number code continuously assigned to the track of the music information corresponding to the additional information, a pack number code continuously assigned to the pack, and the text additional information of the text additional information divided and recorded in the pack. A character number code indicating which character of the character string is recorded in the first digit of the pack, and (a) the storage device Preparing a text data storage area and an identification information storage area;
(B) sequentially reading the packs from the music compact disc; and (c) this step (b).
Storing the fixed-length character string of the pack read in step 2 in a text data storage area of the storage device in a predetermined order; and (d) replacing a part of the pack header read in step (b) with: Storing the fixed-length pack information in the identification information storage area of the storage device in a predetermined order; (e) inputting a reproduction request condition designating arbitrary text additional information; and (f) this step. Searching the identification information storage area of the storage device based on the track number code and the data type code included in the reproduction request condition input in (e);
Obtaining the pack information of the pack;
(G) The pack number code and the character number code are extracted from the pack information acquired in step (f), and the text additional information is stored based on the pack number code and the character number code. Calculating a start address of the text data storage area of the storage device; (h) extracting the character string of the pack from the start address of the text data storage area of the storage device; Detecting the delimiter code of the text additional information from the character string extracted in step (g);
(J) repeating the extraction of the character string from the text data storage area of the storage device until the delimiter code is detected in step (i). 7. The method according to claim 7, wherein the pack includes an error check code, and the CD text reproducing method includes: (k) reading the error check code from the music compact disc;
Based on the error check code, the step (b)
Determining the data read error of the pack when reading the pack; and (l) including the determination result in step (k) in the pack information so as to include the identification information storage area of the storage device. 7. The method according to claim 5, further comprising the step of:
D text playback method. 8. (m) The text data storage area of the storage device in which the text additional information next to the text additional information to be extracted according to the reproduction request condition input in the step (e) is stored. (N) calculating the end address of the address at the time when the delimiter code is detected in the step (i); m) determining whether the last address calculated in step (n) is smaller than the end address obtained in step (n); and (p) determining in step (o) that the last address is smaller than the end address. Replacing the end address with the last address when it is determined to be smaller. Or the CD text reproduction method according to 7. 9. A step (q) for determining whether or not the track number codes extracted in the step (g) are continuous. (R) In this step (q), the track number code is If it is determined that they are not consecutive,
9. The CD text reproducing method according to claim 6, further comprising a step of complementing the track number code. 10. The text additional information includes a song title, an artist name, a lyricist name, a composer name, an arranger name, and a message, and the type code identifies a type of the text additional information. The CD text reproducing method according to any one of claims 5 to 9, wherein: 11. The CD text reproducing method according to claim 5, further comprising the step of displaying the character string extracted in the step (h). 12. A method for adding text to a music compact disc in which at least one type of text additional information for at least one piece of music information is divided and recorded in a plurality of packs including a fixed-length character string to which a header is added. A compact disc reproducing apparatus comprising: a storage device for reading and temporarily storing information; and a reproducing unit for extracting and reproducing the text additional information from the storage device in response to a reproduction request. A reading unit for sequentially reading the pack from the music compact disc, including a data storage region and an identification information storage region; and a fixed-length character string of the pack read by the reading unit, the text data of the storage device. The data is stored in the storage area in a predetermined order, and the path read by the reading means is read. Control means for storing a part of the header of the header as fixed-length pack information in the identification information storage area of the storage device in a predetermined order; and an input for inputting a reproduction request condition for specifying arbitrary text additional information. Means for searching the identification information storage area of the storage device based on the reproduction request condition input by the input means and obtaining the pack information of the pack; and pack information obtaining means Address calculation means for calculating a storage position of the specified text additional information in the text data storage area of the storage device based on the pack information obtained in the step (a), and the text from the storage position calculated by the address calculation means A compact disk reproducing apparatus comprising: extracting means for extracting additional information. 13. At least one type of text additional information for music information recorded on at least one track includes a variable-length character string and a delimiter code inserted between the variable-length character strings. The additional information is
Means for reading out the text additional information from a music compact disc divided into a plurality of packs including a fixed-length character string to which a header is added and temporarily storing the text additional information in a storage device; Means for extracting and reproducing the text additional information from the storage device, wherein the header comprises: a type code of the text additional information recorded in the pack; and a text recorded in the pack. A track number code continuously assigned to the track of the music information corresponding to the additional information, a pack number code continuously assigned to the pack, and the text additional information of the text additional information divided and recorded in the pack. A character digit number code indicating which character of the character string is recorded in the first digit of the pack; Reading means for sequentially reading the packs from the music compact disc, and a fixed-length character string of the packs read by the reading means. Control for storing in a data storage area in a predetermined order and storing a part of the header of the pack read by the reading means as fixed length pack information in the identification information storage area of the storage device in a predetermined order. Means, input means for inputting a reproduction request condition designating arbitrary text additional information, and the storage device based on the track number code and the data type code included in the reproduction request condition input by the input means. Searching the identification information storage area of
A pack information acquiring unit for acquiring the pack information of the pack; and extracting the pack number code and the character number code from the pack information acquired by the pack information acquiring unit.
Address calculating means for calculating a start address of the text data storage area of the storage device in which the text additional information is stored, based on the pack number code and the character number code; and storing the text data of the storage device. Extracting means for extracting the character string of the pack from the start address of the area; detecting means for detecting the delimiter code of the text additional information from the character string extracted by the address calculating means; Means for repeatedly extracting the character string from the text data storage area of the storage device until the delimiter code is detected. 14. The pack includes an error check code, the compact disc reproducing apparatus reads the error check code from the music compact disc, and the reading means reads the pack based on the error check code. When the data is read, there is provided an error determination unit that determines a data read error of the pack, and the control unit determines a determination result by the error determination unit,
13. The storage device according to claim 12, wherein the identification information is stored in the identification information storage area of the storage device while being included in the pack information.
4. The compact disc playback device according to 3. 15. A start address of the text data storage area of the storage device in which the text additional information next to the text additional information to be extracted according to the reproduction request condition input by the input means is stored. A last address calculating means for calculating a previous address as a last address; an end address obtaining means for setting an address at the time when the delimiter code is detected by the detecting means as an end address; and a last address calculated by the last address calculating means. 15. The compact disk reproducing apparatus according to claim 13, further comprising: a unit that replaces the end address with the last address when the address is smaller than the end address obtained by the end address obtaining unit. 16. The apparatus according to claim 13, further comprising means for complementing the track number code when the track number code extracted by the address calculating means is not continuous. A compact disc playback device as described. 17. The text additional information includes a song title, an artist name, a lyricist name, a composer name, a arranger name, and a message, and the type code identifies a type of the text additional information. 17. The compact disk reproducing apparatus according to claim 12, wherein the reproducing apparatus is a compact disk reproducing apparatus. 18. The apparatus according to claim 1, further comprising display means for displaying the character string extracted by said extraction means.
18. The compact disc reproducing apparatus according to any one of 2 to 17. 19. A method according to claim 1, wherein at least one type of text additional information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added, and recorded from a compact disc for music. In order to reproduce the information, a computer readable recording medium storing a CD text storage program for reading the text additional information from the music compact disc and temporarily storing the text additional information in a storage device includes:
Preparing a text data storage area and an identification information storage area in the storage device; (b) sequentially reading the packs from the music compact disc; and (c) reading in this step (b). Storing a fixed-length character string of the pack in a text data storage area of the storage device in a predetermined order; and (d) converting a part of the pack header read in the step (b) to a fixed length. Storing in a predetermined order as the pack information in the identification information storage area of the storage device, wherein the CD text storage program is recorded. 20. The pack including an error check code, wherein the CD text storage program acquires (e) the error check code of the pack read in step (b); and (f) the step (B) determining a data read error of the pack based on the error check code acquired in step (e) when reading the pack; and (g) determining the result of step (f). Storing the CD text storage program according to claim 19, wherein the information is stored in the identification information storage area of the storage device while being included in the pack information. 21. In the step (d) of the CD text storage program, the pack information is stored in the storage device so that the capacity of the storage device is smaller than the capacity of the CD text area of the music compact disc. 21. The recording medium according to claim 19, wherein the program is stored in the identification information storage area. 22. The text additional information includes a song title, an artist name, a lyricist name, a composer name, an arranger name and a message, and the type code identifies a type of the text additional information. 22. A recording medium on which the CD text storage program according to claim 19 is recorded. 23. The method according to claim 13, wherein at least one type of text additional information for at least one piece of music information is divided into a plurality of packs each including a fixed-length character string to which a header is added, and recorded from the compact disk for music. A computer storing a CD text reproducing program, comprising: reading information and temporarily storing the information in a storage device; and extracting and reproducing the text additional information from the storage device in response to a reproduction request. (A) preparing a text data storage area and an identification information storage area in the storage device; (b) sequentially reading the packs from the music compact disc; c) The fixed-length character string of the pack read in step (b) is stored in the storage device (D) storing a part of the header of the pack read in step (b) as fixed-length pack information in the identification information storage area of the storage device; Storing in a predetermined order; (e) inputting a reproduction request condition designating arbitrary text additional information; and (f) storing the storage request based on the reproduction request condition input in step (e). Searching the identification information storage area of the device and obtaining the pack information of the pack; and (g) storing the pack information of the text data storage area of the storage device based on the pack information obtained in step (f). Calculating the storage location of the specified text additional information; and (h) extracting the text additional information from the storage location calculated in step (g). Recording medium recording a CD text playback program characterized by comprising the steps of. 24. At least one type of text additional information for music information recorded on at least one track includes a variable length character string and a delimiter code inserted between the variable length character strings. The additional information is
Reading the text additional information from a music compact disc divided into a plurality of packs including a fixed-length character string to which a header is added, and temporarily storing the text additional information in a storage device; Extracting the text additional information from the storage device and reproducing the text additional information, wherein the header is a type of the text additional information recorded in the pack. Code, a track number code consecutively assigned to a track of music information corresponding to the text additional information recorded in the pack, a pack number code consecutively assigned to the pack, and divided into the pack. What character of the character string of the text additional information recorded is recorded in the first digit of the pack. (A) preparing a text data storage area and an identification information storage area in the storage device;
(B) sequentially reading the packs from the music compact disc; and (c) this step (b).
Storing the fixed-length character string of the pack read in step 2 in a text data storage area of the storage device in a predetermined order; and (d) replacing a part of the pack header read in step (b) with: Storing the fixed-length pack information in the identification information storage area of the storage device in a predetermined order; (e) inputting a reproduction request condition designating arbitrary text additional information; and (f) this step. Searching the identification information storage area of the storage device based on the track number code and the data type code included in the reproduction request condition input in (e);
Obtaining the pack information of the pack;
(G) The pack number code and the character number code are extracted from the pack information acquired in step (f), and the text additional information is stored based on the pack number code and the character number code. Calculating a start address of the text data storage area of the storage device; (h) extracting the character string of the pack from the start address of the text data storage area of the storage device; Detecting the delimiter code of the text additional information from the character string extracted in step (g);
(J) repeating the extraction of the character string from the text data storage area of the storage device until the delimiter code is detected in step (i). Recording medium. 25. The pack includes an error check code, the CD text reproducing program reads (k) the error check code from the music compact disc, and performs the step (b) based on the error check code. ), When the pack is read, determining a data read error of the pack; and (l) storing the identification information of the storage device by including the determination result in step (k) in the pack information. Storing in an area.
Recording medium on which the CD text reproduction program described in 1 above is recorded. 26. The CD text reproducing program,
(M) one of start addresses of the text data storage area of the storage device in which the text additional information next to the text additional information to be extracted according to the reproduction request condition input in step (e) is stored; Calculating the previous address as the final address;
(N) setting an address when the delimiter code is detected in the step (i) as an end address;
(O) determining whether the final address calculated in step (m) is smaller than the end address obtained in step (n); and (p) determining the final address in step (o). 26. The recording medium according to claim 24, further comprising: replacing the end address with the last address when it is determined that the end address is smaller than the end address. 27. The CD text reproducing program,
(Q) determining whether or not the track number codes extracted in the step (g) are continuous; and (r) determining that the track number codes are not continuous in the step (q). 27. The recording medium according to claim 24, further comprising a step of supplementing the track number code when the judgment is made. 28. The text additional information includes a song title, an artist name, a lyricist name, a composer name, a arranger name, and a message, and the type code identifies a type of the text additional information. A recording medium recording the CD text reproduction program according to any one of claims 23 to 27. 29. The program according to claim 23, wherein the CD text reproducing program further comprises a step of displaying the character string extracted in the step (h).
A recording medium on which the CD text reproduction program according to any one of the above is recorded.