JPH0950687A - Reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a convenient, practical scanning function by suspending the reproduction of the head section of a music in a first specified time after a signal of a specified frequency band is detected and starting the search of the head section of the next music. SOLUTION: When the scan switch is operated, a deck mechanism section 15 is brought to the FF condition where the signal recorded in the recording medium is being reproduced. When the recording section of the next music comes, the S1 signal is brought to the 4 level so that the deck mechanism section 15 becomes the reproducing condition to cause the audio circuit 11 to output reproduced sound from a speaker etc. Even when the vocal section is detected by the time when time T3 is elapsed, the search of the music head is not immediately initiated, but, only after time T3 is elapsed, it is initiated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing device such as a cassette tape player or a compact disc (CD) player, and more specifically, reproducing a recording medium such as a tape on which an audio signal or the like is recorded to reproduce music such as music. The present invention relates to a reproducing device having a scan function of sequentially performing head reproduction.

[0002]

2. Description of the Related Art Conventionally, cassette tape players and CDs
A reproducing device such as a player often employs a music head scanning function for continuously performing music head reproduction for reproducing a head portion of a music piece for a predetermined time. FIG. 8 is a block diagram of a reproducing apparatus having a conventional scan function, and FIG. 9 is a timing chart of a conventional scan operation.

Reference numeral 81 is an audio circuit, which reads a recording signal from a recording medium such as a cassette tape or a CD and outputs it to a detection circuit 82. The detection circuit 82 rectifies and smoothes the read recording signal and outputs it to the comparator 83. In the comparator 83, when the DC voltage rectified and smoothed by the detection circuit 82 is equal to or higher than a certain voltage, a high potential signal (H level) is output to the microcomputer 84 as the S1 signal (in the middle of a song), and when the voltage is equal to or lower than the certain voltage, the S1 signal is output. Low potential signal (L level) as signal (between songs)
Is output. The microcomputer 84 controls the deck mechanical section 85 by the information (S1 signal) from the audio circuit 81,
The deck mechanical unit 85 is caused to perform operations such as reproduction and song head search.

Next, the scan operation will be described with reference to the timing chart of FIG. When a scan switch (not shown) is operated (at time t91), a fast-forward (FF) state is set and the signal recorded on the recording medium is reproduced in this state (however, it is not output from the speaker or the like due to the mute operation). Then, at the recording portion of the next music, the audio signal (recording signal of tape, CD, etc.) is output from the audio circuit 81, and the S1 signal becomes H level (in the music). It should be noted that there is no audio signal (silent portion, interval between songs, etc .: t9
2 to t93) and the S1 signal becomes L level (between songs). When the microcomputer 84 detects the H level indicating that the song is in progress (at time t93), it activates a counter for determining the time to start the beginning of the song search operation for the next song, and when the time T0 has elapsed (at time t94). The beginning search of the next song starts,
Thereafter, similar operations are sequentially performed.

[0005]

However, in the conventional music head scan function, T0 of 10 to 12 seconds is generally used, and in the case of a long intro part, the main part of the music having a high music discriminating ability is used. For example, since the search operation of the next song is performed before the vocal portion is played, there is a problem that the playback of the next song is started without understanding the content of the song.

An object of the present invention is to solve such a problem.

[0007]

SUMMARY OF THE INVENTION The present invention is to solve such a problem, and is a reproducing apparatus for reproducing an audio signal recorded on a recording medium, which comprises a plurality of music pieces recorded on the recording medium. In a reproducing apparatus having a scanning means for sequentially retrieving and reproducing the beginning portion of a music piece, a first specific frequency detecting means for detecting a signal of a specific frequency band in the reproduced signal,
The first specific frequency detecting means stops reproduction of a beginning portion of a music piece after a first predetermined time from when a signal in a specific frequency band is detected, and starts searching for a beginning portion of a next music piece.
And a search start means.

Further, when a signal in a specific frequency band is not detected by the first specific frequency detecting means within a second predetermined time from the start of reproduction of the beginning of the music, reproduction of the beginning of the music is stopped and the next A second search starting means for starting a search for the beginning of the music. Further, in a reproducing device for reproducing an audio signal recorded on a recording medium, the reproducing device having a scanning means for sequentially retrieving and reproducing a music head portion of a plurality of music recorded on the recording medium,
Second specific frequency detecting means for detecting a signal in a specific frequency band in the reproduction signal, and when the signal in the specific frequency band is detected by the second specific frequency detecting means, reproduction of the beginning portion of the music piece is performed immediately. And a third search starting means for stopping the search and starting the search for the beginning of the next music.

Further, when a signal of a specific frequency band is detected by the second specific frequency detecting means within a third predetermined time from the start of reproduction of the beginning of the music, reproduction extension for extending the reproduction operation of the beginning of the music. It is characterized by having means.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a reproducing apparatus having a scanning function according to the present invention. 11 as shown
Is an audio circuit for reading an audio signal from a recording medium such as a cassette tape or a CD with a magnetic head or an optical pickup, reproducing the audio signal, and outputting a reproduced sound from a speaker. In the present embodiment, a cassette tape player will be described below. Reference numeral 12 is a detection circuit that rectifies and smoothes the audio signal output from the audio circuit 11 and converts it into a DC voltage, that is, outputs a signal of a voltage corresponding to the audio signal level. Reference numeral 13 compares the DC voltage V1 obtained by rectifying the audio signal by the detection circuit 12 with a reference DC power supply voltage V2, and if the DC voltage V1 is higher than the DC power supply voltage V2 (the voice signal is input, ) S1 signal (during song)
Is a comparator that outputs a high potential signal (H level). If the DC voltage V1 is lower than the DC power supply voltage V2 (state where music signal is between songs), a low potential signal (L level) is output as S1 signal (between songs).

Reference numeral 16 denotes a BPF (Band P) that allows a signal of a specific frequency band in a voice signal, for example, a 1 KHZ signal whose main component is a human voice (vocal signal) in music.
assFilter). Reference numeral 17 is a detection circuit that rectifies and smoothes the vocal signal that has passed through the BPF 16 and converts it into a DC voltage. Reference numeral 18 compares the DC voltage V3 obtained by rectifying the vocal signal by the detection circuit 17 with a reference DC power supply voltage V4. Potential signal (H
This is a comparator that outputs a (level) S2 signal. If the DC voltage V3 is lower than the DC power supply voltage V4, the vocal signal is not input and the low potential signal (L level) is output. Reference numeral 14 is a microcomputer that controls a deck mechanism section 15 of an audio device, for example, a cassette tape player or a CD player, according to the S1 signal and the S2 signal output from the comparators 13 and 18. The deck mechanical section 15 performs operations such as reproduction and song head search according to control signals from the microcomputer 14.

Next, the processing / operation in the first embodiment of the present invention will be described. FIG. 2 is a flowchart showing the processing operation of the microcomputer according to the first embodiment. Also, in FIG.
FIG. 4 is a timing chart of the scan operation according to the first embodiment. The processing performed by the microcomputer 14 in order to realize the scanning operation of the present embodiment in the reproducing apparatus will be described. As shown in FIG. 2, when the cassette tape player is turned on, the cassette tape is loaded, the reproducing apparatus is in the reproducing state, and the scan switch (not shown) is operated to start the scanning operation, the present process starts. Move to step A1. In step A1, it is determined whether or not the elapsed time (T1) after the vocal signal is detected is counted. If T1 is counted, the process proceeds to step A2. If T1 is not counted, step A1 is counted.
Move to 3. In step A2, it is judged whether or not the count of T1 is completed (whether the predetermined time T1 has elapsed). If not, the scan process is once ended and another process is executed (scan operation is ended (switch off)). After completion of other processing, or again at a predetermined time, step A1 is performed again.
If the process is completed, the deck mechanical section 15 is caused to start the FF operation. That is, when the cassette tape is reproduced from the beginning of the music, the intro part is reproduced first, and then the reproduction of the vocal part is started, the S2 signal becomes H level and T1
Start counting. In step A1, it is determined whether or not the counting of T1 is being performed. In step A2, if the elapsed time T1 has been counted (if the predetermined time T1 has elapsed), it is assumed that the user has reproduced the music for a sufficient time to confirm the content of the music, and the deck mechanical unit 1
By controlling No. 5, the FF operation for searching the beginning of the next music is performed.

At step A3, it is judged whether the S1 signal is at H level or L level. If it is at H level, the process proceeds to step A4. If it is at L level, the scanning process is once terminated and another process is performed (step A2). As well). That is, when the cassette tape is reproduced from the beginning of the music, the S1 signal becomes the H level, and the silent portion, the interval between the music and the like becomes the L level. At step A3, it is judged whether the music is in the middle or the space between the music. There is.

In step A4, it is judged whether or not the elapsed time (T2) after detecting the beginning of the music is counted. If T2 is not counted, the process proceeds to step A5. If T2 is counted, the process proceeds to step A6. . In step A5, counting of T2 is started (initial value is set and counting is started), and the process proceeds to step A6. In step A6, T
It is judged whether or not the count of 2 has finished (whether or not the predetermined time T2 has passed). If the count has finished, the deck mechanical section 15 is controlled to perform the FF operation for searching the beginning of the song. If not, step A7 Move on to. That is, in step A2, the vocal part is reproduced for a predetermined time T1 after the intro part, and then the FF operation is performed to start the beginning search of the next music. However, if the vocal is not recorded or if the intro part is the predetermined time T
With a recording medium having a length of 2 or more, when the intro portion is reproduced for T2 hours as a fail-safe function, the beginning of the next song is searched.

In step A7, it is determined whether the S2 signal is at H level or L level. If it is at H level, the process proceeds to step A8, and if it is at L level, the scanning process is temporarily terminated and another process is performed (step A2 and As well). In step A8, counting of T1 is started (initial value is set and counting is started), the scanning process is once ended, and another process is performed (similar to step A2).

Next, the case shown in FIG. 3 will be described with reference to the timing chart with respect to the temporal relationship between the signal system of the scanning operation and the operating state of the deck mechanical section 15. When a scan switch (not shown) is operated (at time t1),
The deck mechanical unit 15 is in the fast-forward (FF) state, and the signal recorded on the recording medium in that state is being reproduced (however, it is not output from the speaker or the like due to the mute operation). When the reproduced music enters the end music (time t2), the S1 signal temporarily becomes L level. When the next song is recorded (at time t3), the S1 signal becomes H level, so that the deck mechanical unit 15 is in the reproduction (PLAY) state, and the audio circuit 11 outputs the reproduced sound (intro) from the speaker or the like. To do. Then, the microcomputer 14
When the H level of one signal is detected, counting is started to determine the time (playback time T2) at which the beginning search of the next piece of music is started. Then, the reproduction is continued, and when the reproduction of the vocal portion starts (at time t4), the S2 signal becomes H level.
When the microcomputer 14 detects the H level of this S2 signal,
A count for determining the time (start time T1 of the vocal portion) for starting the beginning search operation of the next song is started, and when T1 time elapses (at time t5), the beginning search of the next song is started. Thereafter, similar operations are sequentially performed.

Next, another case of FIG. 4 (a case where the music recorded on the tape is different) will be described. The difference between this example and the example of FIG. 3 is that no vocal is recorded in the audio signal recorded in the recording medium, or the intro portion is long T
This is the case when recorded for two hours or more. When a scan switch (not shown) is operated (at time t11), the deck mechanical unit 15 is in the FF state, and the signal recorded in the recording medium in this state is reproduced (however, it is not output from the speaker or the like due to the mute operation). ). When the reproduced music enters the end music (time t12), the S1 signal temporarily becomes L level. And it becomes the recording part of the next song (t
At time 13), the S1 signal becomes the H level, so the deck mechanical unit 15 is in the reproduction (PLAY) state, and the audio circuit 11 outputs the reproduction sound (intro portion) from the speaker or the like. When the microcomputer 14 detects this S1 signal (H level), it starts counting to determine the time (playback time T2) at which the beginning of the next song is searched (play time T2), and T2 time elapses (at time t15). Even if the vocal portion is not detected, the beginning search of the next song is started, and the same operation is sequentially performed thereafter.

As described above, in the first embodiment, in contrast to the conventional scanning operation in which the beginning of a music piece is reproduced for a fixed time (10 to 12 seconds), the portion where the contents of the music can be sufficiently confirmed is set for a predetermined time (intro section Since the subsequent vocal portion is reproduced for T1 hour, it is possible to prevent the user from starting the operation for searching the beginning of the next music without knowing the content of the music. In addition, a fail-safe function is provided so that even a recording medium in which vocals are not recorded or the intro portion is longer than T2 hours is not reproduced for a longer time than necessary.

Next, a second embodiment of the present invention will be described. FIG. 5 is a flowchart showing the processing operation of the microcomputer according to the second embodiment. 6 and 7 are timing charts of the scan operation according to the second embodiment. The processing performed by the microcomputer 14 in order to realize the scanning operation of the present embodiment in the reproducing apparatus will be described. FIG.
As shown in FIG. 3, the cassette tape player is turned on, the cassette tape is loaded, the reproducing apparatus is in the reproducing state, the scan switch (not shown) is operated, and the scanning operation is started. Move on to. In step B1, it is determined whether the S1 signal is at the H level or the L level. If the S1 signal is at the H level, the process proceeds to step B2. If the signal is at the L level, the scan process is temporarily terminated and another process is performed (the scan operation ends (switch After the other processing is completed or until a predetermined time elapses, the process returns to step B1). That is, the S1 signal is at the H level in the middle portion of the music on the cassette tape, and the S1 signal is at the L level in the silent portion and the space between the music.
Although it is in the level state, in step B1, it is judged whether it is in the middle of a song or between songs.

In step B2, it is judged whether or not the elapsed time (T3) since the beginning of the music piece is counted, and T3
If B is not counted, the process proceeds to step B3, and if T3 is counted, the process proceeds to step B4. Step B3
Then, the counting of T3 is started (set to the initial value and counting is started), and the process proceeds to step B4. That is, the S1 signal is L
When the level is changed to the H level, counting of the elapsed time T3 is started.

At step B4, it is judged whether the S2 signal is at the H level or the L level. If the S2 signal is at the H level, the process proceeds to step B5. If the signal is at the L level, the scanning process is once terminated and another process is performed (step B1). As well). At step B5, whether the count of T3 is finished (predetermined time T3
Is determined), and if the count is over, the deck mechanism section 15 is controlled to perform an F for searching the beginning of the song.
The F operation is performed, and if not completed, the scanning process is once completed and another process is performed (similar to step B1).

Next, the case shown in FIG. 6 will be described with reference to the timing chart with respect to the temporal relationship between the signal system of the scanning operation and the operating state of the deck mechanical section 15. A scan switch (not shown) is operated (at t21)
Then, the deck mechanical section 15 is in the FF state, and the signal recorded on the recording medium in this state is reproduced (however,
It is not output from the speaker due to the mute operation).
When the microcomputer 14 detects the H level of the S1 signal, it starts counting to determine the time (playback time T3) at which the beginning of the next music piece search operation is started.

The song being played is finished and enters between songs (t
22) and the S1 signal temporarily becomes L level. And
When it becomes the recording part of the next song (at time t23), the S1 signal becomes H
Since the level is reached, the deck mechanism section 15 is regenerated (PLA
The Y state is entered, and the audio circuit 11 outputs the reproduced sound (intro portion) from the speaker or the like. Then, it is continuously reproduced, and the reproduction of the vocal part starts (at the time t24: T
3 before) and the S2 signal becomes H level. Microcomputer 14
When this S2 signal (H level) is detected, the music head search operation of the next music piece is started, and thereafter the same operation is sequentially performed.

Next, the case shown in FIG. 7 will be described. The difference from the case shown in FIG. 6 is that the intro portion of the audio (song) signal recorded on the recording medium is extremely short,
In the case of a song in which the user may not be able to fully confirm the content of the song only by playing the intro part, even if the vocal part rises (even if the S2 signal becomes H level), the song continues playing and the beginning of the song starts playing. This is the point where the beginning search of the next song is started after the time T3 has elapsed.

When a scan switch (not shown) is operated (at time t31), the deck mechanical section 15 is set to the FF state, and the signal recorded on the recording medium is reproduced in that state (however, the speaker or the like is muted by the mute operation). Is not output). When the music being reproduced enters the end music (at time t32), the S1 signal temporarily becomes L level. When the next song is recorded (at time t33), the S1 signal becomes H level, so that the deck mechanical unit 15 reproduces (PL).
The audio circuit 11 outputs the reproduced sound (intro portion) from the speaker or the like. When the microcomputer 14 detects the H level of the S1 signal, it starts counting to determine the time (playback time T3) at which the beginning of the next music piece search operation is started. Then, even if a vocal portion is detected by the time T3 (time t35) (time t34: H level of S2 signal is detected), the beginning search is not started immediately, and time T3 elapses ( t3
At the time of 5), the beginning search is started.

As described above, in the second embodiment, the scanning operation for sequentially reproducing only the intro portion can be realized, and in the case of a recording medium having a short intro portion, a certain time (T3 time) has elapsed and vocals have been passed. Even if the portion is reproduced, the scanning operation is not started until the reproduction time from the beginning of the music reaches a certain time (T3 time). Therefore, even if the introduction part is a short piece of music, the content of the piece of music can be sufficiently confirmed.

Although the above-described first and second embodiments are different scan operations, a program for realizing these scan operations and a conventional normal scan operation is stored in the microcomputer and connected to the microcomputer. It is also possible to make it possible to select a desired one from these scanning operations with the changeover switch provided. In the above-described embodiment, the music heads are reproduced in the order of recording, but it is also possible to perform the same operation as a so-called random scan in which the reproduction order of the music heads is random.

[0028]

As described in detail above, according to the present invention, since the head of a music piece can be sequentially reproduced for an appropriate time, a very convenient and practical scanning function can be realized. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a reproducing apparatus having a scan function according to the present invention.

FIG. 2 is a flowchart showing a processing operation of the microcomputer according to the first embodiment.

FIG. 3 is a timing chart of a scan operation according to the first embodiment.

FIG. 4 is a timing chart of a scan operation according to the first embodiment.

FIG. 5 is a flowchart showing a processing operation of a microcomputer according to a second embodiment.

FIG. 6 is a timing chart of a scan operation according to the second embodiment.

FIG. 7 is a timing chart of a scan operation according to the second embodiment.

FIG. 8 is a block diagram of a conventional reproducing apparatus having a scan function.

FIG. 9 is a timing chart of a conventional scan operation.

[Explanation of symbols]

 11 ... Audio circuit 12 ... Detection circuit 13 ... Comparator 14 ... Microcomputer 15 ... Deck mechanism section 16 ... BPF 17 ... Detection circuit 18 ... ..Comparators

Claims (4)

[Claims] 1. A reproducing apparatus for reproducing an audio signal recorded on a recording medium, the reproducing apparatus having a scanning means for sequentially retrieving and reproducing a beginning portion of a plurality of music pieces recorded on the recording medium. A first specific frequency detecting means for detecting a signal of a specific frequency band in the reproduction signal, and a song after a first predetermined time from when the signal of the specific frequency band is detected by the first specific frequency detecting means. Stop playback at the beginning and start searching for the beginning of the next song
A reproducing apparatus having a search starting means. 2. When the signal of a specific frequency band is not detected by the first specific frequency detecting means within a second predetermined time from the start of the reproduction of the beginning of the music, the reproduction of the beginning of the music is stopped, and the next 2. The reproducing apparatus according to claim 1, further comprising a second search starting means for starting a search for a music head portion of the music. 3. A reproducing apparatus for reproducing an audio signal recorded on a recording medium, the reproducing apparatus having a scanning means for sequentially retrieving and reproducing a beginning portion of a plurality of music pieces recorded on the recording medium. Second specific frequency detecting means for detecting a signal in a specific frequency band in the reproduction signal, and reproduction of the beginning portion of the music piece when the signal in the specific frequency band is detected by the second specific frequency detecting means And a third search start means for starting the search for the beginning of the next piece of music. 4. A reproduction extension for extending the reproduction operation of the music head portion when a signal of a specific frequency band is detected by the second specific frequency detection means within a third predetermined time from the start of reproduction of the music head portion. The reproducing apparatus according to claim 3, further comprising means.