JP2000311444A - Device and method for reproducing signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the accuracy of a function for jumping over an unrecorded area. SOLUTION: The signal reproducing device 100 which reproduces a recording medium provided with an unrecorded area between recorded areas where signals of arbitrary frequency are recorded is provided with a microcomputer 21 which extracts a music signal of specific frequency from a music signal being recorded when a signal reproducing process for reading out and reproducing the music signal from a music CD 50 by a CD(compact disk) player 11 reaches a point 10 seconds precedent to the end of the currently reproduced music and jumps over the unrecorded area of the CD 50 when the level of the extracted music signal is a reference level of <07h continuously for 500 msec.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal reproducing apparatus and a signal reproducing method for reproducing a recording medium having a non-recording area between recording areas in which a signal of an arbitrary frequency is recorded. More specifically, it is detected whether the signal reproducing process by the recording / reproducing means has reached a recording area of a predetermined length immediately before the end of a preset recording area, and a specific signal is selected from signals reproduced from the recording area immediately before the end. Extract the signal of the frequency of
Control means for comparing the level of the extracted signal with a preset reference level and controlling the recording / reproducing means to skip a non-recording area of the recording medium based on the comparison result is provided. This is intended to improve the accuracy of the function for skipping over.

[0002]

2. Description of the Related Art In recent years, with the development of technology, various storage media for recording signals and reproduction devices for reproducing signals recorded on the storage media have become widespread. For example, a compact disk (Compact Disk: hereinafter referred to as a CD) and a mini disk (Mini Disk: hereinafter).
It is called MD. ) Is an example of such a player. These playback devices are provided with various functions, such as a blank skip function for skipping between songs and performing continuous playback, which is optimal when, for example, dancing music is played. According to the conventional method, the blank skip function extracts only a predetermined part of the music signal from the reproduced music signal, compares the music signal level with a predetermined reference level, and determines a non-recording area. It is made to fly.

[0003]

However, according to the conventional method, only a predetermined part of the music signal is extracted from the reproduced music signal, and the music signal level and the predetermined reference level are determined. In order to skip the non-recording area by comparison, compared with the reference level, only a part of the preset music signal level of the reproduced music signal is compared with the reference level. This causes a problem that the accuracy of the function of skipping a non-recording area is prevented from being improved. Therefore, the present invention has been made to solve the above-mentioned problem, and a signal reproducing apparatus and a signal reproducing method which improve the accuracy in a function of skipping a non-recording area by devising a method of comparing reproduced signals. It is intended to provide a reproduction method.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a signal reproducing apparatus for reproducing a recording medium in which a non-recording area is provided between recording areas in which a signal of an arbitrary frequency is recorded, by reading a signal from the recording medium. A recording / reproducing means for reproducing, detecting whether a signal reproducing process by the recording / reproducing means has reached a recording area of a predetermined length immediately before the end of a preset recording area, and a signal reproduced from the recording area immediately before the end. A signal of a specific frequency is extracted from among the above, the level of the extracted signal is compared with a preset reference level,
The problem is solved by a signal reproducing apparatus characterized by comprising a control means for controlling a recording / reproducing means so as to skip a non-recording area of a recording medium based on the comparison result.

According to the present invention, when a signal is read from a recording medium by the recording / reproducing means and reproduced, the signal reproducing process by the recording / reproducing means is performed for a predetermined length immediately before the end of the preset recording area. Is detected by the control means, and a signal of a specific frequency is extracted from the signals reproduced from the recording area immediately before the end by the control means. The level of the extracted signal is compared with a preset reference level, and the recording / reproducing means is controlled to skip a non-recording area of the recording medium based on the comparison result. Therefore, by changing the sampling point of the frequency of the extracted signal, a desired frequency signal can be compared with the reference level from among the reproduced signals.

In the signal reproducing method according to the present invention, a predetermined length of storage area immediately before the end of each recording area is set in advance, and the signal reproduction processing for reading from the recording medium reaches the recording area immediately before the end. Monitor, and sequentially extract a signal of a specific frequency from signals reproduced from the recording area immediately before the end, sequentially compare the level of the extracted signal with a preset reference level, and The signal is reproduced so as to skip the non-recording area of the recording medium based on the comparison result.

According to the signal reproducing method of the present invention, a signal of a specific frequency is sequentially extracted from the signals reproduced from the recording area immediately before the end, and the extracted signals are sequentially extracted and extracted. The signal level is compared with a preset reference level, and the non-recording area of the recording medium is skipped based on the comparison result. Therefore, it is possible to improve the accuracy in the function of skipping the non-recording area.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A signal reproducing apparatus and a signal reproducing method according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a signal reproducing device 100 as an embodiment according to the present invention. In this embodiment, it is detected whether the signal reproducing process by the recording / reproducing means has reached a recording area of a predetermined length immediately before the end of a preset recording area, and the signal reproduced from the recording area immediately before the end is detected. A signal of a specific frequency is extracted from the signal, a level of the extracted signal is compared with a preset reference level, and the recording / reproducing means is skipped based on the comparison result so as to skip a non-recording area of the recording medium. A control means for controlling is provided to improve the accuracy of the function of skipping a non-recording area. Here, it is assumed that a CD on which a music signal is recorded is reproduced.

A signal stored in a recording area a such as a CD 50 as a recording medium is read out and reproduced by the recording / reproducing means 10 shown in FIG. Then, the control means 20 detects whether or not the signal reproduction processing by the recording / reproduction means 30 has reached a recording area of a predetermined length t immediately before the end of the preset recording area a. If the signal reproduction processing has reached the predetermined length t, the level of the music signal subjected to the signal reproduction processing from the recording area a immediately before the end is compared with a preset reference level, and the CD level is set based on the comparison result.
The control means 20 controls the recording / reproducing means 10 so as to skip the 50 non-recording area b.

FIG. 2 is a block diagram showing a configuration example of the signal reproducing apparatus 100. For example, the CD player (recording / reproducing means) 11 shown in FIG. 2 is connected to, for example, a microcomputer (control means) 21 (Micro Computer: hereinafter referred to as a microcomputer). This CD player 11 is C
The music signal recorded in D50 is read out and reproduced, and the playing time of the music composed of the music signal is also read out. The microcomputer 21 that stores the performance time as a performance time signal J is provided with, for example, an A / D conversion port 22 to which the reproduced music signal is transmitted.

The microcomputer 21 monitors the music signal transmitted to the A / D conversion port 22 on the basis of the stored performance time signal J to determine whether or not the signal reproduction processing is performed, for example, within 10 seconds immediately before the end of the performance. It is done as follows. This microcomputer 21
Starts the comparison between the music signal level subjected to the signal reproduction processing and a preset reference level if the signal reproduction processing has arrived within 10 seconds immediately before the end of the performance.

The reference level is set to, for example, 07h (7/25
6 level: audible level), etc., and the level of the music signal is 0
When the level is less than 7 h and the duration is, for example, 500 msec or more, the microcomputer 21 sends a skip signal S to the CD player 11.
And the skip signal S causes the CD player 11
Stops the currently playing music and skips the non-storage area b shown in FIG. 1 by playing the next music. Note that the CD player 11, the microcomputer 21, and the A /
The D conversion port 22 is not limited to this, but may be any as long as it has the same effect.

The A / D conversion port 22 is connected to, for example, a frequency analyzer (frequency extracting means) 30 or the like. The frequency analyzer 30 has, for example, a filter band of seven bands. Here, the microcomputer 21 generates, for example, an extraction signal Vfi (i = 1 to 7) for sequentially extracting seven frequency band bands from the reproduced music signal to the frequency analyzer 30. The frequency analyzer 30 sequentially extracts a signal based on the extracted signal Vfi and transmits the signal to the A / D conversion port 22.
The frequency analyzer 30 is not limited to this, but may be any as long as it has the same effect.

Here, for example, a blank skip key 41 for controlling start and stop of a blank skip function for skipping a non-recording area is connected to the microcomputer 21. Microcomputer 2
For example, the memory 40 or the like connected to 1 turns off the blank skip function or stores the blank skip function until the power supply to the apparatus is cut off. Note that the blank skip key 41 and the memory 40 are not limited to these, but may be any as long as they have the same effect.

FIG. 3 is a conceptual diagram showing a comparative example in the signal reproducing apparatus 100. Recording area a of CD 50 shown in FIG.
, When the signal reproduction process comes to a point w1 within 10 seconds immediately before the end, for example, the level m of the music signal at that time starts to be compared with the reference level 07h. Then, when the signal reproduction processing reaches the point w2, for example, the level n of the music signal at that time is less than the reference level 07h, and if the level n of the music signal continues for 500 msec or more at this time, the non-recording area b is set. Skipping and starting reproduction of the next recording area c.

Next, an operation example of the signal reproducing apparatus 100 according to the embodiment of the present invention will be described. 4 and 5 are flowcharts showing an operation example (parts 1 and 2) of the signal reproducing device 100. In this example, it is assumed that in the part immediately before the end of the music, if the music signal level continues for 500 msec or more, jump to the beginning of the next music. Assuming this, first, in step T1 shown in FIG.
It is determined whether or not the blank skip key 41 shown in FIG. 2 has been pressed, and if it has been pressed, the process proceeds to step T2.
If not, the process proceeds to step T3. Step T
In 2, it is determined whether the reception of the blank skip key 41 is permitted. Here, for example, the reception is prohibited during the selection of another function, and therefore, when another function such as the recording function or the reverse function is selected, the process returns to step T1. However, here, for example, it is possible to select another function before setting the blank skip function.

If the reception is permitted in step T2, the process proceeds to step T4, where it is determined whether or not the blank skip function is already turned on. If the blank skip function is already turned on, the blank skip function is turned off in step T6.
Then, the normal reproduction with the music is performed, and the control is terminated. If the blank skip function is not turned on, the blank skip function is turned on in step T5,
The process proceeds to step T7 shown in FIG.

In this step T7, the microcomputer 21 converts the music analysis signal H shown in FIG. 2 into an A / D signal to determine whether or not the level of the music signal being reproduced is zero (the non-recording area b shown in FIG. 3).
The determination is made by monitoring at the conversion port 22. If the music analysis signal H is zero, the process proceeds to step T11 where the microcomputer 2
CD player 11 that has received the skip signal S from
As a result, the non-recording area b is skipped from the recording area a where the signal reproduction processing shown in FIG.
Are subjected to signal reproduction processing. If the music analysis signal H is not zero, it is determined in step T8 whether the music is being reproduced within 10 seconds from the end of the music based on the performance end time stored as the information signal J by the microcomputer 21 and within 10 seconds. If not, the process returns to step T7, and if it is within 10 seconds, the process proceeds to step T9.

At this step T9, the microcomputer 21 sequentially generates the extracted signals Vfi (i = 1 to 7),
0 is sequentially extracted as a music analysis signal H for each frequency band, and the microcomputer 21 determines whether or not the level of the extracted music signal is less than a preset reference level of 07h. The determination is made by comparison at the D conversion port 22. If it is not less than 07h, step T9 is performed again.
And if it is less than 07h, the process proceeds to step T10. In step T10, the microcomputer 21 determines whether or not the music analysis signal H has a music signal level of less than 07h for 500 msec or more.

A music signal level of less than 07h is 500 msec.
If the music signal level of less than 07h exists for 500 msec or more, the process proceeds to step T11, where the CD player 11 which has received the skip signal S from the microcomputer 21 shown in FIG. From the recording area a where the signal reproduction processing is being performed to the non-recording area b
Is skipped and the next recording area c is subjected to signal reproduction processing. Then, the process returns to step T7, and the recording area c on which the signal reproduction processing has been performed is similarly monitored. Here, the blank skip function is previously turned on in step T3 shown in FIG.
If not, the control is terminated. If the blank skip function has been turned on in advance, the process proceeds to step T7, where the control is performed as described above.

For this reason, it is possible to skip the non-recording area immediately before the end of the music and perform continuous reproduction. Further, the reproduced music signal is extracted for each of the seven frequency band bands, sequentially transmitted to the A / D conversion port 22, and the level of the transmitted music signal is sequentially compared with the reference level. Performance can be improved.

As described above, according to the signal reproducing apparatus 100 according to the embodiment of the present invention, the signal reproduction for reading the music signal from the music CD by the CD player 20 is performed 10 seconds before the end of the music being reproduced. When it arrives, the microcomputer 2
1, the extracted signals Vfi (i = 1 to 7) are sequentially generated, and the frequency analyzer 30 uses the extracted signals Vfi (i = 1 to 7) to generate a music signal for each of seven frequency band bands from the reproduced music signal. Are sequentially extracted. Then, when the extracted music signal has a level of less than
Since the microcomputer 21 skips over the non-recording area of the CD 50 when it exists for 0 msec or more, continuous reproduction can be performed immediately before the end of the music. In addition, the control of the apparatus can be simply improved in software without additional hardware, so that the apparatus can be easily and inexpensively manufactured.

[0023]

As described above, according to the present invention,
When signal reproduction for reading a signal from a recording medium arrives immediately before the end of a preset recording area, a signal of a specific frequency is extracted from signals reproduced from the recording area immediately before the end, and the extraction is performed. And a control means for controlling the recording / reproducing means so as to skip a non-recording area of the recording medium based on a result of the comparison between the signal level thus obtained and a preset reference level. With this configuration, a desired frequency signal can be compared with the reference level from among the reproduced signals by changing the sampling point of the frequency of the signal to be extracted.

According to the signal reproducing method of the present invention, a signal of a specific frequency is sequentially extracted from signals reproduced from a recording area immediately before the end, and the level of the extracted signal is set in advance. The reference levels thus obtained are sequentially compared, and the non-recording area of the recording medium is skipped based on the comparison result. Therefore, it is possible to improve the accuracy in the function of skipping the non-recording area. INDUSTRIAL APPLICABILITY The present invention is extremely suitable for use in a signal reproducing apparatus such as a CD and an MD.

[Brief description of the drawings]

FIG. 1 shows a signal reproducing apparatus 1 according to an embodiment of the present invention.
It is a block diagram which shows the example of a structure of 00.

FIG. 2 is a block diagram illustrating a configuration example of a signal reproduction device 100 as the embodiment.

FIG. 3 is a conceptual diagram showing a comparative example using the signal reproducing apparatus 100.

FIG. 4 is a flowchart showing an operation example (No. 1) of the signal reproducing apparatus 100.

FIG. 5 is a flowchart showing an operation example (No. 2) of the signal reproducing apparatus 100.

[Explanation of symbols]

 Reference Signs List 11 CD player (recording / reproducing means) 21 Microcomputer (control means) 30 Frequency analyzer (frequency extracting means) 100 Signal reproducing device

Claims (3)

[Claims] 1. A signal reproducing apparatus for reproducing a recording medium in which a non-recording area is provided between recording areas in which signals of an arbitrary frequency are recorded, comprising: a recording / reproducing means for reading a signal from the recording medium and reproducing the signal; It is detected whether the signal reproducing process by the recording / reproducing means has reached a recording area of a predetermined length immediately before the end of the set recording area, and a specific signal is selected from among the signals reproduced from the recording area immediately before the end. A signal of a frequency is extracted, a level of the extracted signal is compared with a preset reference level, and the recording / reproducing unit is controlled to skip a non-recording area of the recording medium based on the comparison result. A signal reproducing device comprising: 2. The signal reproducing apparatus according to claim 1, wherein said control means includes frequency extracting means for extracting a signal of a specific frequency from signals reproduced from a recording area immediately before the end. apparatus. 3. A signal reproducing apparatus for reproducing a recording medium in which a non-recording area is provided between recording areas in which signals of an arbitrary frequency are recorded, wherein a storage area of a predetermined length immediately before the end of each of the recording areas is provided. The signal reproduction processing for reading from the recording medium monitors whether or not the recording area immediately before the end has been reached, and a signal of a specific frequency from among the signals reproduced from the recording area immediately before the end. Sequentially extracting, sequentially comparing a level of the extracted signal with a preset reference level, and reproducing the signal so as to skip a non-recording area of the recording medium based on the comparison result. Signal reproducing method.