JP3179120B2 - Optical information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of converting a plurality of songs (a series of information data, not limited to songs, to songs) into song number data corresponding to each song, that is, a track number, and one more song. The present invention relates to a recording device for recording on a recording medium together with identification information including an index number for pointing to a portion of the same.

[0002]

2. Description of the Related Art A predetermined format signal composed of a main code carrying a plurality of music pieces and a subcode carrying various identification information corresponding to each music piece is recorded on a recording medium such as a CD or DAT and reproduced. Techniques for performing this are known. This subcode has an 8-bit structure, and includes P, Q, R, S, T,
There are U, V and W channels. Of these, the P channel represents a music break, and is coded as 1 between music and 0 in music. The Q channel is composed of track number data indicating the number of a track on the recording medium, that is, a track number, time data indicating the time elapsed from each track and the beginning of the recording medium, and one track. Is assigned an index number to further divide this.

FIG. 1 shows a block diagram of a conventional example. In the figure, a terminal 1, for example, analog audio to be recorded
The audio signal is input and supplied to the conversion circuit 2. The conversion circuit 2 comprises an A / D converter, converts an input analog signal into a digital signal to be used as a main code (hereinafter, simply referred to as an audio signal), and converts the analog signal into a format signal.
To supply. The format processing circuit 3 subjects the audio signal and a sub-code, which will be described later, to predetermined format processing, and then supplies them to the EFM modulation circuit 4. The EFM modulation circuit 4 modulates the audio signal including the formatted subcode into an EFM digital signal, and supplies the EFM digital signal to the recording system 5. The recording system 5 includes a laser element, an optical unit, and the like, and records the supplied EFM digital signal on a disk 6 as an optical information recording medium.

[0004] The audio signal output by the conversion circuit 2 is also supplied to a volume detection circuit 7 at the same time, and the volume level of the audio signal is detected. The volume detection circuit 7 further determines whether or not the volume level of the audio signal has changed below a predetermined value.
When the value changes to a predetermined value or less, an effective level signal is output as an inter-song signal indicating the end of a song and supplied to the inter-song detection circuit 8. Upon receiving the valid level signal, the inter-song detection circuit 8 determines whether or not it is the beginning of the next song, and sends a track number change request signal for the song to be recorded, that is, a song number change request signal. It is supplied to the setting circuit 9 and issues a music number change command.

The music number setting circuit 9 sets and holds music number data to be recorded. The music number can be switched by a music number change command from the music interval detection circuit 8. I have. The track number setting circuit 9 sub-codes the set track number data.
To the data generation circuit 10. The subcode generation circuit 10 corrects the music number data in accordance with the music order inputted based on the music number change command, and generates a new subcode. The new subcode output from the subcode generation circuit 10 is
As described above, the signal is supplied to the format processing circuit 3 and is formatted together with the audio signal.
Is recorded on the disk 6 after the EFM modulation.
The recording signal recorded on the disk 6 in this way has music number data according to the order of music to be recorded based on the input signal.

FIG. 2 is a flowchart showing a subcode generation procedure from the volume detection circuit 7 to the subcode generation circuit 10 in FIG. First, in the music interval detection circuit 8, it is determined in step S1 whether or not the operation mode is the recording mode. If the operation mode is the recording mode, the volume level of the audio signal is detected by the volume detection circuit 6, and it is determined whether or not the volume level is equal to or higher than a predetermined level (step S2). Here, the value of the volume -60 dB is adopted as the value of the predetermined level so that the volume level of the silent signal is used as a reference.

If it is determined that the sound volume is lower than -60 dB, the sound volume detecting circuit 7 supplies an effective level signal to the inter-song detecting circuit 8 to activate the inter-song timer in the inter-song detecting circuit 8, and at the same time, the music is detected. It is determined whether or not the interval timer has ended, that is, whether or not a predetermined time set in the music interval timer has elapsed (step S3). If the predetermined time has not elapsed, the operation procedure shifts to step S1. If the predetermined time has elapsed, the inter-track flag Fmb is set, that is, Fmb
= 1 (step S4), and then the process proceeds to step S1.

If it is determined in step S2 that the input signal is not lower than the predetermined level, the inter-track timer is cleared (step S5), and the inter-track flag Fmb is determined (step S6). As a result of the determination, the inter-track flag Fmb is set to Fmb = 1.
In other words, if it is set, the inter-song detection circuit 8 clears the inter-song flag Fmb to Fmb = 0 (step S
7) Supply a song number change request signal to the song number setting circuit 9.
Receiving this, the music number setting circuit 9 increments the recording track number corresponding to the music number of the music by one (step S).
8) Then, after outputting new music number data to the sub-code generation circuit 9, the process proceeds to step S1. If the inter-song flag is Fmb = 0 in step S6, that is, if the inter-song flag is cleared, the process immediately proceeds to step S1 without changing the song number as in steps S7 and S8.

If the recording mode is canceled and it is determined in step S1 that recording is not being performed, the inter-track timer and the inter-track flag Fmb are cleared (steps S9 and S10), and the flow is terminated. The above operation will be described with reference to the timing chart of FIG. FIG. 3A shows a waveform representing the volume level of an input signal, and FIG. 3B shows a track number synchronized with the input signal. FIG. 9C is the same as the inter-music flag Fmb in FIG. 2 described above, and shows the high level of the waveform as “1” and the low level as “0”. FIG. 6D shows the track number to be recorded, that is, the recording track number set in the music number setting circuit 8.

At time T1, when the volume level of the input signal falls below a predetermined value and a silent portion is detected, the inter-song timer in the inter-song detection circuit 8 starts operating, and at time T2 after a predetermined time elapses. The interval flag Fmb becomes 1. Volume detection is performed even after the inter-song flag Fmb is set. When the input signal reaches a predetermined volume level or more at time T3, the head of the next song is detected, and the inter-song detection circuit 8 sets the inter-song flag to At the same time, the track number change request signal is output to the track number setting circuit 9 and the recording track number is incremented.

The same processing as described above may be performed for times T4, T5, and T6. However, as shown at time T6, if the input signal to be recorded exceeds 99 songs, the standardized recording is possible. Since the track number is exceeded, the recording track number cannot be incremented. That is, even if it is detected from the silent portion of the input signal that the beginning of the next song is detected, the song number setting circuit 9 no longer has a recordable track number. You cannot do it. Therefore, when a recording medium on which 100 or more songs are recorded by a conventional recording apparatus is reproduced, there is a problem in that it is not possible to identify each song after the 100th song and search for the corresponding song.

[0012]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to record a song whose recording track number exceeds a predetermined value on a recording medium. An object of the present invention is to provide an optical information recording device capable of searching.

[0013]

An optical information recording apparatus according to the present invention comprises an inter-song signal generating means for generating an inter-song signal indicating the inter-song of a tune carried by an input digital signal, and a track number change based on the inter-song signal. Music interval detecting means for outputting a request signal;
Track number setting means for sequentially changing and setting the recording track number for each block according to the track number change request signal; and sub-code generating means for generating a sub-code based on the recording track number. A formatter for generating a main code for carrying the input digital signal and synthesizing the main code and the subcode to obtain a CD format signal; and converting the CD format signal to EFM. An optical information recording apparatus comprising: recording means for modulating and recording on a recording medium, comprising index number setting means for sequentially changing and setting a recording index number for each block according to an index number change request signal. The inter-song detecting means detects the inter-song signal based on the inter-song signal after the recording track number reaches a predetermined value. The index number - Output a change request signal, the subcode - de generating means the recording track number - is characterized by generating a de - the subcode on the basis of - and the recording index number.

[0014]

In the optical information recording apparatus according to the present invention, the recording track number is sequentially switched in response to the number of music pieces in the input signal up to the predetermined value, and the recording track number exceeds the predetermined value. In this case, the recording index number is switched, and a subcode is generated based on the recording track number and the index number.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 4 is a block diagram of an embodiment of the present invention, and the same parts as those in FIG. 1 are denoted by the same reference numerals and perform the same operation. In this embodiment, in addition to the configuration shown in FIG. 1, a sub-track number setting circuit 11 is provided as an index number setting means, and an index number change request signal, that is, a sub-track number change request signal from the inter-track detection circuit 12 is generated. , The sub-track number data is switched and settable. The inter-song detection circuit 12 takes in the current recording track number set in the music number setting circuit 9 and compares it with the recordable track number "99". In this case, a song number change request signal is supplied to the song number setting circuit 8, and when the number exceeds 98, a sub song number change request signal is supplied to the sub song number setting circuit 11. The sub-code generation circuit 13 generates a sub-code based on the music number data and sub-music number data set in the music number setting circuit 9 and the sub music number setting circuit 11. The music number and sub music number data are so-called track numbers and index numbers that carry the Q channel in the sub-code in the standardized CD format.

FIG. 5 shows a sub-code from the volume detection circuit 6 to the sub-code generation circuit 13 in FIG.
This is a flowchart showing a procedure for generating a code. In the flowchart of FIG. 5 as well, steps for performing the same processing as in FIG. 2 are denoted by the same reference numerals, that is, step numbers, and detailed description thereof will be omitted. In this flowchart, when incrementing the recording track number after the inter-track flag is set, the sub-code to be recorded according to the currently set recording track number after clearing the inter-track flag Increment the recording track number or index number inside.

That is, after clearing the inter-track flag in step S7 in FIG. 5, the recording track number is changed to a recordable track number 99 based on the current recording track number set in the music number setting circuit 9. It is determined whether or not it has reached (step S11). If the recording track number is 98 or less, the recording track number is incremented by one in the music number setting circuit 9 in response to the music number change request signal from the music interval detection circuit 12 (step S).
8). Then, the recording index number in the sub music number setting circuit 11 is set to its initial value "01" (step S12), and then the process proceeds to step S1.
Therefore, until the currently set track number reaches 98, the flow goes through steps S8 and S12.
The recording track number is switched in accordance with the order of the input tune while the recording index number is fixed.

On the other hand, when the recording track number has reached 99, the recording track number is not incremented as in step S8, and the sub-track number setting circuit is used in response to the sub-track number change signal from the inter-track detecting circuit 12. At 11, the recording index number is incremented by 1 (step S13), and then the process proceeds to step S1. Therefore, after the recording track number reaches 99, step S13 is executed.
And the recording track number is 99
The recording index number is incremented in accordance with the order of the music input as it is.

FIG. 6 shows a timing chart in the subcode generation operation. FIG.
FIG. 3D shows (a) an input signal and FIG.
(B) a track number synchronized with the input signal, (c) a music interval flag, and (d) a recording track number. In this embodiment, in addition to the recording track number, the recording index number is used as information indicating the interval between music pieces in the recording information signal.
, Which is shown in FIG.

As described above with reference to FIG. 5, until the time T3, that is, until the current recording track number set in the music number setting circuit 9 reaches 98, the recording track number is sequentially determined in accordance with the music order of the input signal. Is incremented, and the recording index number is fixed at "01". After that, the recording track number becomes 99 and the inter-track flag is set at time T6, and the recording track number in the music number setting circuit 9 does not change even if the beginning of the 100th music is detected. Instead, the inter-tune detection circuit 12 supplies a sub-tune number change request signal to the sub-tune number setting circuit 11, so that the recording index number is changed from “01” to “01” while the recording track number is fixed at 99. 02 ".

As described above, the recording track number 100
By incrementing the recording index number for the subsequent songs, the inter-song or song head information corresponding to the songs can be recorded on the disc 6. Therefore, when reproducing the disc recorded in this way, even when reproducing the music having a track number of 100 or later, it is possible to search for each music by performing an index search.

FIG. 7 is a flowchart showing an example of an operation procedure for retrieving a specific music piece in a reproduced signal when reproducing the recording medium recorded by the above embodiment. This retrieval routine is represented as a subroutine in a form extracted from a main routine in an optical information reproducing apparatus (not shown). In the figure, when the reproducing apparatus shifts to the search routine, first, at the time of key input by the user or during the normal performance and the program performance, the reproducing apparatus acquires the music number set in the system, that is, the designated track number TRN (step S101). Then, the value of the designated track number TRN is determined (step S102).

In step S102, if the designated track number TRN is 99 or less, a search operation based on a normal designated track number is performed (step S102).
103) After that, it shifts to the main routine. If the designated track number TRN exceeds 99, the index number is obtained by subtracting 99 from the track number TRN.
The IDN is obtained and the designated track number TRN is set to 99 (step S104).

Then, the search operation of the designated track number 99 is performed (step S105), and the position of the pickup, such as a disc player, is changed to the position of the track number 99, that is, the index number of the 100th track and thereafter. Will be reached. Next, based on the index number IDN calculated in step S104, a so-called index search is performed (step S106), and the process proceeds to the main routine. Index search here is track number
The index number after 99 is searched, and the position of the information reading point is moved to the position of the index number IDN.

As described above, in the information recording medium recorded according to the present invention, the normal search using the track number and the index search using the index number are performed on the reproducing side.
By using the key in combination, it is possible to search for the tunes after the 100th tune recorded. In the above embodiment, the recording medium is simply a disk. However, this disk may be any type of writable (recordable) type such as a WO type that can be written only once and an RW type that can be rewritten. Further, a magnetic recording medium such as a DAT (Digital Audio Tape) can be used without limitation to a disk.

Further, the input signal to be recorded on the recording medium is
Although described as an analog audio signal, the present invention is not limited to this, and it goes without saying that the present invention is similarly applicable to a digital input signal carrying another information signal. It is sufficient that there is provided a means for supplying information indicating a break between each information signal data block in the input signal without using such means as described above. For example, a recording device in which an input signal is an EFM digital signal and the signal is recorded on a recording medium in accordance with the order of the music is disclosed in Japanese Patent Application No. Hei.
No. 1998, a sub-code accompanying an input signal is extracted and decoded to obtain an inter-song signal which is an inter-block signal of an information signal. Thus, it is clear that it is not always necessary to obtain the inter-song signal of the input signal by detecting the volume as in the above embodiment.

[0027]

As described above, in the optical information recording apparatus according to the present invention, the recording track number is sequentially switched according to the number of music pieces in the input signal up to a predetermined value, and the recording track number is changed. When が reaches a predetermined value that cannot be switched, the recording index number is switched, and the recording track number and index number are set as subcodes. The corresponding respective identification information can be recorded. Therefore, in the recording medium recorded according to the present invention, it is possible to search for each music by performing an index search when reproducing a predetermined number of music numbers or later.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a configuration of a conventional optical information recording device.

FIG. 2 is a flowchart showing a subcode generation operation procedure in FIG. 1;

FIG. 3 is a time chart for explaining the recording operation of FIG. 1;
G.

FIG. 4 is a block diagram showing an example of the configuration of an optical information recording device according to the present invention.

FIG. 5 is a flowchart showing a subcode generation operation procedure in FIG. 4;

FIG. 6 is a time chart for explaining the recording operation of FIG. 4;
G.

FIG. 7 is a flow chart showing a search procedure of a reproducing apparatus for reproducing a recording medium recorded by the recording apparatus according to the present invention.
G.

[Explanation of symbols]

 7 ... Volume detection circuit 9 ... Song number setting circuit 11 ... Sub-song number setting circuit 12 ... Song number detection circuit 13 ... Subcode generation circuit

Claims (3)

(57) [Claims] 1. An inter-song signal generating means for generating an inter-song signal indicating an inter-song between music pieces carried by an input digital signal, and a inter-song detection means for outputting a track number change request signal based on the inter-song signal. Track number setting means for sequentially changing and setting the recording track number for each block in accordance with the track number change request signal; and subcode generating means for generating a subcode based on the recording track number. And a main code for carrying the input digital signal, and the main code and the sub-code.
An optical information recording apparatus, comprising: a formatter for synthesizing a CD format signal to obtain a CD format signal; and a recorder for EFM-modulating the CD format signal and recording the same on a recording medium. Index number setting means for sequentially changing and setting the recording index number for each block in response to the index number change request signal, wherein the music interval detecting means sets the recording track number after the recording track number reaches a predetermined value. The index number change request signal is output based on the inter-song signal, and the sub-code generating means generates the sub-code based on the recording track number and the recording index number. Optical information recording device. 2. The information carried by the input digital signal is off-state.
Audio signal, wherein the inter-song signal generating means is an audio signal.
2. The optical information recording apparatus according to claim 1, wherein the inter-music signal is output when the volume level of the Dio signal is equal to or lower than a predetermined silence level. 3. The inter-song detecting means includes timer means which operates in response to the generation of the inter-song signal and stops in response to the disappearance of the inter-song signal. 3. The optical information recording apparatus according to claim 2, wherein the track number change request signal or the index number change request signal is output when the inter-song signal disappears after a lapse of time.