JP3310740B2 - Audio signal playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio signal reproducing apparatus suitable for a compact disc reproducing apparatus capable of reproducing CD-G software for karaoke.

[0002]

2. Description of the Related Art Text data and graphics data are recorded in subcodes of a CD (compact disc) called CD-G software. A CD player reproduces karaoke CD-G software, supplies a reproduced audio signal to a speaker to obtain karaoke accompaniment music, and outputs a video signal related to graphics data extracted from the detection subcode to a television. It is supplied to a monitor to display lyrics and the like for karaoke.

[0003]

In a CD reproducing apparatus capable of reproducing the karaoke CD-G software as described above, the start of a predetermined music from the reproduction state is performed regardless of the presence or absence of a microphone connection. When the key is operated, the music is caught and the reproduction state is immediately set, so that the music for accompaniment may start even though the user is not ready for singing, which is very inconvenient. Met.

In view of the above, the present invention provides an audio signal reproducing apparatus which improves user-friendliness when, for example, reproducing music for accompaniment of karaoke.

[0005]

An audio signal reproducing apparatus according to the present invention comprises: an audio signal reproducing means for outputting an audio signal;
A microphone connection terminal, audio signal synthesis means for synthesizing the first audio signal output from the audio signal reproduction means and the second audio signal output from the microphone, and whether the microphone is connected to the connection terminal Detecting means for detecting the sound signal reproducing means, control means for controlling the operation of the audio signal reproducing means, and input means for instructing the operation of the audio signal reproducing means. Then, when the audio signal reproducing means is in the reproducing state and the input means instructs a cueing operation of a predetermined music, the control means determines whether the microphone is connected to the connection terminal based on the detection output of the detection means. Controls the audio signal reproducing means so as to be in a pause state after cueing the predetermined music, and when the microphone is not connected to the connection terminal, immediately after cueing the predetermined music, the reproduction state The audio signal reproducing means is controlled so that

[0006]

According to the present invention, when the microphone is connected, the audio signal reproducing means is controlled so that a predetermined tune is searched and then a pause state is set. Therefore, for example, music for accompaniment of karaoke is reproduced. In this case, the user only has to perform the operation of releasing the pause after the singing is ready, and the usability can be improved. Further, when the microphone is not connected, the audio signal reproducing means is controlled so as to be in the reproducing state immediately after the start of the predetermined music, so that music other than music for accompaniment for karaoke is reproduced. Does not require a pause release operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. This example is an example applied to a CD reproducing apparatus capable of reproducing CD-G software.

In FIG. 1, reference numeral 1 denotes a CD such as CD-G software.
It is. A signal reproduced from the CD 1 by an optical pickup (not shown) is supplied to a digital signal processing circuit 3 via an RF amplifier 2 and to a servo signal processing circuit 4. The digital signal processing circuit 3 performs clock recovery processing, demodulation processing, error correction processing, subcode detection processing, and the like.

In the servo signal processing circuit 4, the reproduction signal from the RF amplifier 2 is processed by a conventionally known method, and focus servo and tracking servo of an optical pickup (not shown) are performed. Further, a clock reproduced by the digital signal processing circuit 3 is supplied to the servo signal processing circuit 4, and rotational servo (constant linear velocity control) is performed based on the clock.

The operations of the digital signal processing circuit 3 and the servo signal processing circuit 4 are controlled by a system controller 5 having a microcomputer. The system controller 5 is connected with a keyboard 6 for the user to instruct operations such as play, pause, cueing, and stop, and a display 7 for displaying an operation state. The subcodes of the P and Q channels detected by the digital signal processing circuit 3 are supplied to the system controller 5. When a tune is specified by the keyboard 6, the servo signal processing circuit 4 is controlled based on the subcode, whereby an optical pickup is sent by a sled moder (not shown) and a cueing operation is performed. Done.

The left and right audio signals L and R output from the digital signal processing circuit 3 are D / A converters 8L and 8L, respectively.
After being converted into an analog signal by 8R, it is supplied to the movable terminals of the changeover switches 10L and 10R via the muting circuits 9L and 9R. The operations of the muting circuits 9L and 9R and the changeover switches 10L and 10R are controlled by the system controller 5. Changeover switch 10L,
Left and right audio signals L, obtained at the fixed terminal on the a side of 10R,
R is supplied to the audio signal output terminals 11L and 11R, respectively.

Left and right audio signals L and R obtained at fixed terminals on the b side of the changeover switches 10L and 10R are supplied to a voice cancel circuit (vocal fader) 12.
The operation of the voice cancel circuit 12 is controlled by the system controller 5. In the voice cancel circuit 12, when the audio signals L and R are a composite signal of an accompaniment signal and a vocal signal (hereinafter, referred to as a “mix signal”),
The vocal signal is removed from each. FIG. 2 shows a specific configuration of the voice cancel circuit 12.

In the figure, input terminals 101L, 101R
Are supplied to voice cancellation processing systems 103L and 103R via buffer amplifiers 102L and 102R, respectively. The voice cancellation processing system 103L for the L channel will be described.

An audio signal L (shown in FIG. 3A) output from the buffer amplifier 102L is a high-pass filter 104L.
And a high-frequency component LH (for example, 4 KHz or more) of the audio signal L is extracted from the high-pass filter 104L (shown in FIG. 3B). When the audio signal L is a mixed signal, the high frequency component LH is almost occupied by the high frequency component of the accompaniment signal. The audio signal L output from the buffer amplifier 102L is supplied to a low-pass filter 105L, and the low-pass component LL of the audio signal L is extracted from the low-pass filter 105L (shown in FIG. 3C). Audio signal L
Is a mixed signal, the low-frequency component LL is almost occupied by the low-frequency component of the accompaniment signal.

The audio signal L output from the buffer amplifier 102L is also supplied to a difference signal forming circuit 106L composed of a differential amplifier or the like. Difference signal forming circuit 106L
Represents the audio signal R output from the buffer amplifier 102R.
Is also supplied, and a difference signal (LR) is obtained from the difference signal forming circuit 106L (shown in FIG. 3C). In general, since the vocal signal is localized at an intermediate position with respect to the accompaniment signal, it is considered that the vocal signal is included in the left and right audio signals L and R at substantially the same ratio and in the same phase. Therefore, by taking the difference between the left and right audio signals L and R, the vocal signal (300 Hz to 4 or 5 KHz) included in each of them is cancelled, and the low frequency component of the accompaniment signal (the signal component up to about 1 KHz). ) Is partially canceled. For this reason, the difference signal (L-R) mainly includes frequency components above the middle band of the accompaniment signal (for example, 1 KHz or more).

The low-pass component LL output from the low-pass filter 105L and the difference signal (LR) output from the difference signal forming circuit 106L are supplied to an adder 109L via level adjusting resistors 107L and 108L, respectively. Are added. In the adder 109L, the difference signal (LR)
Is added to the low-frequency component LL to supplement the low-frequency component of the accompaniment signal. The output signal of the adder 109L is added to the adder 1
At 10L, the high-frequency component LH output from the high-pass filter 104L is added, and the high-frequency component is compensated. Thereby, the output signal SL of the adder 110L (shown in FIG. 3D)
Is an L-channel accompaniment signal containing almost no vocal signal even if the audio signal L is a mixed signal. This accompaniment signal SL is output from the L channel output terminal 111L.
Is derived.

The voice cancellation processing system 103R for the R channel is configured similarly to the voice cancellation processing system 103L for the L channel described above. 104R is a high-pass filter, 105R is a low-pass filter, 10R
6R is a difference signal forming circuit composed of a differential amplifier, 107
R and 108R are resistors for level adjustment, 109R and 11
0R is an adder, and 111R is an output terminal of the R channel.

In this case, a high-frequency component RH of the audio signal R is output from the high-pass filter 104R, and a low-frequency component RL of the audio signal R is output from the low-pass filter 105R.
The difference signal (RL) is output from the difference signal forming circuit 106R. The output signal SR of the adder 110R is an accompaniment signal of the R channel that contains almost no vocal signal even if the audio signal R is a mix signal. This accompaniment signal S
R is led to the output terminal 111R of the R channel.

Returning to FIG. 1, the voice cancel circuit 12
Output signals SL and SR of the audio signal output terminal 11
L, 11R. These output terminals 11L and 11R
Left and right audio signals obtained by the amplifier 21L,
The power is supplied to the left and right speakers 22L and 22R via the 21R. Reference numeral 13 denotes a microphone connection terminal. The microphone audio signal MA output from the microphone 23 is supplied to the audio signal output terminals 11L and 11R via the microphone amplifier 14 and the variable resistor 15 for level adjustment.

In the above configuration, the changeover switch 10
When L and 10R are connected to the a side, the audio signals L and 10R
The synthesized signal of the R and microphone audio signal MA is
L and 21R are supplied to the speakers 22L and 22R, and sound by these sound signals is output. on the other hand,
When the changeover switches 10L and 10R are connected to the b-side, a composite signal of the accompaniment signals SL and SR and the microphone audio signal MA is supplied to the speakers 22L and
22R, and the sound based on these sound signals is output.

Reference numeral 16 denotes microphone detection means for detecting whether or not the microphone 23 is connected to the microphone connection terminal 13. The detection output DM of the microphone detection means 16 is supplied to the system controller 5. 4A and 4B show an example of the microphone detecting means 16.

FIG. 1A shows an example in which a microphone connection terminal (microphone jack) 13 for stereo is used and a microphone 23m for monaural is used. In the figure, a ground terminal 13e of the microphone connection terminal 13 is grounded, a left audio terminal 13L is connected to the microphone amplifier 14, and a right audio terminal 13R is connected to the system controller 5. Reference numeral 24 denotes a microphone 23 via a cord.
m is a microphone plug, 24e is a ground terminal, and 24a is an audio terminal.

When the microphone plug 24 is not connected to the microphone connection terminal 13, the microphone audio signal MA is not obtained at the left audio terminal 13L of the microphone connection terminal 13, so that the microphone audio signal MA is supplied to the microphone amplifier 14. Not done. In this case, the right audio terminal 13R of the microphone connection terminal 13
Becomes an electrically floating state. On the other hand, microphone connection terminal 1
3 is connected to the microphone audio signal M, the left audio terminal 13L of the microphone connection terminal 13 is connected to the microphone audio signal M.
A is obtained, and the microphone audio signal MA is supplied to the microphone amplifier 14. In this case, the right audio terminal 13R of the microphone connection terminal 13 is grounded via the ground terminal 24e of the microphone plug 24.

Only when the microphone plug 24 is connected to the microphone connection terminal 13 as described above, the microphone connection terminal 13
Since the right audio terminal 13R is grounded, the connection of the microphone 23m can be determined based on the signal obtained at the right audio terminal 13R. Therefore, a signal obtained at the right audio terminal 13R is supplied to the system controller 5 as a detection output DM of the microphone detection means 16.

FIG. 4B is an example in which a stereo microphone connection terminal (microphone jack) 13 is used and a stereo microphone 23s is used. In the figure, a ground terminal 13e of the microphone connection terminal 13 is grounded, a left audio terminal 13L is connected to the microphone amplifier 14, and a right audio terminal 13R is connected to the system controller 5. 25 is a microphone 23 via a cord.
Reference symbol 25e denotes a ground terminal, 25L denotes a left audio terminal, and 25R denotes a right audio terminal.

When the microphone plug 25 is not connected to the microphone connection terminal 13, the microphone audio signal MA is not obtained at the left audio terminal 13L of the microphone connection terminal 13, so that the microphone audio signal MA is supplied to the microphone amplifier 14. Not done. In this case, the right audio terminal 13R of the microphone connection terminal 13
Becomes an electrically floating state. On the other hand, microphone connection terminal 1
3 is connected to the microphone audio signal M to the left audio terminal 13L of the microphone connection terminal 13.
A is obtained, and the microphone audio signal MA is supplied to the microphone amplifier 14. In this case, the right audio terminal 13R of the microphone connection terminal 13 is connected to the right audio terminal 25 of the microphone plug 25.
R, the right winding of the microphone 23s and the ground terminal 25e of the plug 25 are grounded.

Only when the microphone plug 25 is connected to the microphone connection terminal 13 as described above, the microphone connection terminal 13
Since the right audio terminal 13R is grounded, the connection of the microphone 23s can be determined based on the signal obtained at the right audio terminal 13R. Therefore, the signal obtained at the right audio terminal 13R is used as a detection output DM of the microphone detection means 16 as a system controller. 5 is supplied.

Returning to FIG. 1, the operation of the voice cancel circuit 12 is controlled by the system controller 5 as described above.
Voice cancel circuit 12 only when 3 is connected
Is controlled to operate. That is, when the microphone 23 is not connected to the microphone connection terminal 13, for example, the power supply to the voice cancel circuit 12 is cut off, and the voice cancel circuit 12 is put in a non-operating state. The voice cancel circuit 12 is a karaoke circuit for obtaining only the accompaniment signal from the mix signal as described above, and it is usually sufficient to operate only when the microphone 23 is connected to the microphone connection terminal 13. . Although not shown, the operation of a karaoke circuit (for example, a voice changer, a reverberation adding device, a key control circuit, etc.) other than the voice cancel circuit can be similarly controlled.

The subcode detected by the digital signal processing circuit 3 is supplied to a CD-G decoder 17.
When CD1 is CD-G software for karaoke, graphics data of karaoke is recorded on channels RW. The connection switch 1 is connected to the CD-G decoder 17.
The power supply + B is supplied via the power supply 8. CD-G decoder 1
The operation of 7 is controlled by the system controller 5.

In the CD-G decoder 17, for example, a color video signal SCV of the NTSC system is formed from the karaoke graphics data (R, G, B data) recorded in the subcode channels R to W. The video signal SCV output from the CD-G decoder 17 is supplied to a video signal output terminal 19. The video signal SCV obtained at the output terminal 19 is supplied to, for example, a television monitor 26, and the karaoke lyrics and the like are displayed on the television monitor 26.

Reference numeral 20 denotes an external connector detecting means for detecting whether an external connector for connecting, for example, a television monitor 26 or the like is connected to the video signal output terminal 19.
The detection output DC of the detection means 20 is supplied to the system controller 5. The connection switch 18 described above is controlled by the system controller 5 and is turned on only when an external connector is connected to the video signal output terminal 19, and power is supplied to the CD-G decoder 17.

That is, when the television monitor 26 or the like is not connected to the video signal output terminal 19, the power supply to the CD-G decoder 17 is cut off, and the CD-G decoder 17 is set to a non-operating state. I will Video signal output terminal 1
9 is not connected to the TV monitor 19 or the like,
This is because there is no need to operate the CD-G decoder 17. Although not shown, the operation of a portion related to a video signal other than the CD-G decoder 17 can be similarly controlled.

Hereinafter, C will be described with reference to the flowchart of FIG.
The reproduction operation of D1 will be described.

When the CD 1 is loaded, in step ST1, the TOC (Table of Contents) recorded on the innermost circumference of the CD 1 is set.
After reading the contents of the tents) and storing them in the memory of the system controller 5, the operation is stopped in step ST2,
Further, in step ST3, the video signal SCV of the blue image is output from the CD-G decoder 17, and the blue image is displayed on the television monitor 26.

Next, in step ST4, it is determined whether or not the play key is on. When the play key is pressed and turned on, the sound is muted in step ST5, the first music is searched in step ST6, and then the step ST7 is performed.
Then, it is determined whether or not the microphone 23 is connected to the microphone connection terminal 13 based on the detection output DM of the microphone detection means 16.

If the microphone 23 is not connected in step ST7, the process proceeds to step ST8 to set a reproducing state. In this case, the muting of the sound and the display of the blue image are cancelled. On the other hand, if the microphone 23 is connected in step ST7, after the pause state is set in step ST9, it is determined in step 10 whether the play key is on. When the play key is pressed and turned on, the process proceeds to step ST8 to set the playback state.

Next, in step ST11, it is determined whether or not the pause key is on. When the pause key is pressed and turned on, the sound is muted in step ST12, and it is determined in step ST13 whether or not the microphone 23 is connected to the microphone connection terminal 13 based on the detection output DM of the microphone detection means 16. I do. Step ST
If the microphone 23 is not connected in step 13, the process returns to step ST9 to enter the pause state.

If the microphone 23 is connected in step ST13, the blue image signal SCV is output from the CD-G decoder 17 in step ST14 to display the blue image on the television monitor 26. -Clear RAM (not shown) for storing graphics data in the G decoder 17, clear the beginning of the song being reproduced in step ST16, and return to step ST9 to enter the pause state. As described above, R
The purpose of clearing the AM is to prevent an erroneous image from being displayed by past data stored in the RAM. In the following, the reason for clearing the RAM is the same.

If the pause key is not on in step ST11, it is determined in step ST17 whether the cue key is on. If the cue key is on in step ST17, the sound is muted in step ST18, and the CD-G decoder 1 is muted in step ST19.
7 to output the blue image signal SCV, display the blue image on the television monitor 26, and furthermore, step ST2.
0, the RAM for storing graphics data in the CD-G decoder 17 is cleared.
At 21, it is determined whether or not the microphone 23 is connected to the microphone connection terminal 13 based on the detection output DM of the microphone detection unit 16.

If the microphone 23 is connected in step ST21, the head of the music piece specified in step ST22 is found, and the process returns to step ST9 to be in the pause state. On the other hand, in step ST21, the microphone 23
If is not connected, the head of the music specified in step ST23 is searched, and the process returns to step ST8 to immediately set the reproduction state.

If the cue key is not on in step ST17, it is determined in step ST24 whether the stop key is on. When the stop key is pressed and turned on, the process returns to step ST2 to be in a stopped state, a blue image is displayed on the monitor television 26 in step ST3, and the process proceeds to step ST4.

If the stop key has not been turned on in step ST24, it is determined in step ST25 whether or not the reproduction has ended. If the reproduction has not been completed, the process returns to step ST11 to determine whether or not the pause key is on. When the reproduction is completed in step ST25, the process returns to step ST2 to stop the reproduction, and in step ST3, the monitor TV 2 is stopped.
6, a blue image is displayed, and the process proceeds to step ST4.

As described above, in the present embodiment, the microphone 23 is connected to the microphone connection terminal 13 when the play key is turned on in the stop state, and when the cue key is turned on in the reproduction state. At this time, the pause state is set after the start of a predetermined music piece is performed. Therefore, C
For example, when playing the music for accompaniment for karaoke from D1, the user only has to turn on the play key and perform the operation of releasing the pause after the preparation for the singing, and the user is not ready for the singing. Music is not started, and usability can be improved. Further, when the microphone 23 is not connected, the reproduction state is immediately set after the head of the predetermined music is searched out as in the related art.
For example, there is no inconvenience that a pause release operation is required when music other than music for accompaniment for karaoke is reproduced.

When the pause key is turned on in the playback state and the microphone 23 is connected to the microphone connection terminal 13, the music piece being played back is searched and then the pause state is set. Therefore, when the music for accompaniment for karaoke is reproduced from the CD 1, for example, cueing is simultaneously performed by operating the pause key, so that the usability of the user can be improved. When the microphone 23 is not connected, a pause state is set immediately without performing cueing as in the related art.

When the microphone 23 is not connected to the microphone connection terminal 13 and the voice cancel circuit 12 does not need to be operated, the voice cancel circuit 12 is put into a non-operating state. This is particularly effective for portable equipment using a battery as a power source.

Further, since the television monitor 26 or the like is not connected to the video signal output terminal 19, the CD-G decoder 17
When the CD-G decoder 17 does not need to be operated, the CD-G decoder 17 is put in a non-operating state, so that useless power consumption can be prevented, and this is particularly effective for portable equipment using a battery as a power supply.

In the above embodiment, when the play key is turned on in the stop state, the pause key is turned on in the playback state, and the cue key is turned on in the playback state, the microphone connection terminal 13 When the microphone 23 is connected, the operation is different from that when the microphone 23 is not connected. However, a mode in which the microphone 23 is operated when the microphone 23 is connected and when the microphone 23 is not connected can be selected by, for example, the keyboard 6. You may do so. In the above-described embodiment, the pause state is released by turning on the play key. However, after a predetermined time, for example, several seconds, the pause state may be automatically released and the reproduction state may be set. Further, the above-described embodiment is an example applied to a CD reproducing apparatus. However, it is needless to say that the present invention has a microphone connection terminal and can be similarly applied to other audio signal reproducing apparatuses used as karaoke equipment, for example. .

[0048]

According to the present invention, when the microphone is connected, the audio signal reproducing means is controlled so as to be in a pause state after locating a predetermined music piece. Is played, the user only has to perform the operation of releasing the pause after the singing is prepared, and the usability can be improved. Further, when the microphone is not connected, the audio signal reproducing means is controlled so as to be in the reproducing state immediately after the start of the predetermined music, so that music other than music for accompaniment for karaoke is reproduced. As in the conventional case, the operation of releasing the pause can be omitted.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of an embodiment of an audio signal reproducing device according to the present invention.

FIG. 2 is a system diagram showing a configuration of a voice cancel circuit.

FIG. 3 is an operation waveform diagram of the voice cancel circuit.

FIG. 4 is a diagram illustrating an example of a microphone detection unit.

FIG. 5 is a flowchart illustrating a reproducing operation.

[Explanation of symbols]

 Reference Signs List 1 compact disk (CD) 3 digital signal processing circuit 4 servo signal processing circuit 5 system controller 6 keyboard 9L, 9R muting circuit 10L, 10R changeover switch 11L, 11R audio signal output terminal 12 voice cancel circuit 13 microphone connection terminal 16 microphone detection Means 17 CD-G decoder 19 Video signal output terminal 20 External connector detecting means 22L, 22R Speaker 23 Microphone

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Nobuhiko Oda 1-2-1 Ikenoba, Taito-ku, Tokyo Inside Iwa Corporation (56) References JP-A-62-184683 (JP, A) JP-A-3 -280098 (JP, A) JP-A-4-35473 (JP, A) JP-A-4-15559 (JP, A) JP-A-4-345965 (JP, A) JP-A-5-47064 (JP, A) ) Actually open Hei 5-67948 (JP, U) Actually open Hei 6-16999 (JP, U) Actually open Hei 6-73,995 (JP, U) Actually open 1987-67308 (JP, U) Actually open 1988 146362 (JP, U) Japanese Utility Model Hei 1-15357 (JP, U) Japanese Utility Model Hei 2-42257 (JP, U) Japanese Utility Model Hei 4-54064 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) G11B 20/00

Claims (2)

(57) [Claims] An audio signal reproducing means for outputting an audio signal; a connection terminal of a microphone; and a first audio signal output from the audio signal reproducing means and a second audio signal output from the microphone. Audio signal synthesizing means for synthesizing, detecting means for detecting whether a microphone is connected to the connection terminal, control means for controlling the operation of the audio signal reproducing means, and instructing the operation of the audio signal reproducing means When the audio signal reproducing means is in a reproducing state and the input means instructs a cueing operation of a predetermined music, the control means, based on a detection output of the detecting means, When the microphone is connected to the connection terminal, the audio signal reproducing means is controlled so as to be in a pause state after cueing the predetermined music, and An audio signal reproducing device, wherein when the microphone is not connected to a terminal, the audio signal reproducing means is controlled so as to be in a reproducing state immediately after the start of the predetermined music. 2. The audio signal reproducing apparatus according to claim 1, wherein said pause state is automatically canceled after a predetermined time.