JP2002244677A - Audio reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable even a driver who is driving to reasonably enjoy karaoke with reproduced music. SOLUTION: A reproduced sound (2) for text recognition is outputted with small sound volume a specific time before a reproduced sound (3) for karaoke is outputted and then the user is able to previously listen to the text at the head of a phrase, so the user can remember the text of the phrase and pleasantly sing synchronizing to the reproduced sound (3) for karaoke which is outputted later.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio reproducing apparatus mounted on a vehicle, and more particularly, to an audio reproducing apparatus having a karaoke function for assisting a user singing.

[0002]

2. Description of the Related Art In recent years, an audio reproducing apparatus capable of reproducing music media such as a CD, an MD, and an analog cassette tape is provided as standard equipment on a vehicle.
By playing back two channels (right) or three channels or four channels in surround mode, etc.
The user can enjoy music performance in the vehicle. In addition to simply listening to music, the user can enjoy karaoke by canceling only the vocal component from the playback sound of normal music media and playing back the song, and the user singing himself.

Conventionally, there has been an example in which a reproducing function for canceling vocal sound is mounted on a reproducing apparatus such as a CD player, for example, called a karaoke mode function. This function utilizes, for example, that the vocal sound is localized at the center of the normal LR stereo sound. That is, by subtracting the L channel audio signal and the R channel audio signal, the center localization component, that is, the component having the same frequency and the same phase in the L channel audio signal and the R channel audio signal, is canceled,
The pseudo karaoke mode is realized by deleting the vocal sound.

[0004] In addition, when an in-vehicle device such as an audio reproducing device or a navigation device has a function of displaying lyrics information of a karaoke-only CD such as a CD-G, a display provided in the device is provided. By using the screen to display the lyrics of the reproduced song, the user was able to sing while watching the lyrics displayed on the display screen even for songs that did not remember the lyrics.

[0005]

By the way, in order to memorize a song, a method of playing back a normal CD or the like in which an accompaniment sound and a vocal sound of the song are recorded, and repeatedly listening to the song,
It is common to adopt a method of singing along with the reproduction of the CD to learn the song. Most users can remember the lyrics of the song by repeating the action several times, and if they know the lyrics of the beginning of the phrase, they can remember the lyrics of the phrase and sing all the lyrics of the song. However, in the karaoke function described above, unless the user remembers all the lyrics of the song, the user cannot sing along with the song being reproduced comfortably. In addition, when displaying the lyrics of the song being reproduced on the display screen, it is suitable for the user in the front passenger seat or the rear seat, but not suitable for the driver while traveling. Therefore, you couldn't enjoy karaoke unless you remembered the lyrics of the song.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an audio reproducing apparatus having a karaoke-like function that allows even a driving driver to easily sing along with the reproduced music.

[0007]

According to the present invention, there is provided a signal acquisition unit for acquiring an audio signal from a music medium, and a volume for adjusting and outputting a volume of the audio signal acquired by the signal acquisition unit. Adjusting means, signal accumulating means for accumulating the audio signal acquired by the signal acquiring means, and delaying the audio signal accumulated by the signal accumulating means by a predetermined time from the audio signal output from the volume adjusting means. This problem is solved by providing delay output means for outputting, and synthesis output means for synthesizing and outputting audio signals output from the volume control means and the delay output means.

[0008] In this way, before the playback sound of the normal volume flows from the speaker, the playback sound for the lyrics recognition with the reduced volume flows, so that the first lyrics of the phrase can be known in advance, and You can sing comfortably along with the normal volume of the playback sound that flows from. Also, since the playback voice for lyrics recognition can be heard between the phrases that are the delimiters of the song, the lyrics of the next phrase can be recognized in advance, and as a result, all the phrases can be sung.

[0009]

(A) Outline of the present invention FIG. 1 is a diagram for explaining an outline of the present invention. FIG. 1A is an external view of an audio reproducing apparatus according to an embodiment of the present invention.
O is a volume for adjusting the volume of the reproduced voice output from the speaker, KA is a karaoke button for switching from the other mode to the karaoke mode of the present invention, and WO is an adjusted volume of the reproduced voice for lyric recognition output from the speaker. Volume control setting button to switch to
I is a delay time setting button for switching to a mode for setting how long the playback sound of the normal volume (for karaoke) is output after the playback sound for lyrics recognition is output. FIG. 2B is a diagram showing the temporal relationship between the reproduced sound output for karaoke and the reproduced sound output for lyrics recognition and the output sound volume in the karaoke mode of the audio reproducing device AU. .

In FIG. 1B, the signal (1) indicates a reproduced sound having a volume set by the volume VO of the audio reproducing apparatus AU when reproducing the music media. The signal (2) indicates a reproduced voice for lyrics recognition output at a lower volume than the reproduced voice (1). The signal (3) indicates a karaoke playback sound having the same volume as the playback sound (1) output after a predetermined time (for example, 3 seconds) delay from the playback sound (2) for lyrics recognition. I have.

When the user presses the karaoke button KA of the audio reproducing apparatus AU, first, a reproduced voice for lyrics recognition (2) from a speaker provided in the audio reproducing apparatus AU.
Is output, and after a lapse of a predetermined time, a reproduced sound (3) for karaoke is output. That is, before the karaoke playback sound (3) plays, the lyric recognition playback sound (2) plays a small volume, so that the user can hear the first lyric of the phrase, and remembers the lyric of the phrase. You can sing along with the karaoke playback audio that is played later. In addition, since the playback sound for recognizing the lyrics of the next phrase can be heard even at the section of the song, the lyrics of the phrase to be sung next can be recognized.

(B) Overall Configuration FIG. 2 is a block diagram of an audio reproducing apparatus showing an embodiment of the present invention. Here, a CD player apparatus for reproducing a CD will be described. 1 is an optical disk, 2 is a spindle motor for rotating and driving the optical disk 1, 3 is an optical pickup for reading digital signals recorded by pits on the signal recording surface of the optical disk 1 with a semiconductor laser, and 4 is an optical pickup 3 It is a sled motor that moves in the direction.

Reference numeral 5 denotes an RF amplifier, and an optical pickup 3
A focus error signal and a tracking error signal are generated and output based on the RF signal output from, and the RF signal is amplified and output. Reference numeral 6 denotes a servo controller, which is controlled by a central processing unit 11 described later.
Using the focus error signal and the tracking error signal output from the F-amplifier 5, a control signal necessary for performing a focus servo and a tracking servo of the optical pickup 3 and a thread servo for sending the thread motor 4 is output. During playback, the EFM
(Eight to Fourteen Modulation) Compares the phase of the frame synchronization signal in the signal with the phase of the frequency-divided signal of the reference oscillation signal output from the crystal oscillator (not shown), and performs spindle servo based on the phase difference. Output a control signal.

Reference numeral 7 denotes a focus / tracking servo, which is a focus / tracking servo output from the servo controller 6.
By using the tracking servo control signal, the focus servo actuator of the optical pickup 3 is driven or output from the optical pickup 3 so that the focus of the objective lens of the optical pickup 3 always coincides with the signal recording surface of the optical disc 1. This is a driver for driving the tracking servo actuator of the optical pickup 3 so that the semiconductor laser to be traced always tracks on the track of the optical disk 1.

Reference numeral 8 denotes a thread servo, which uses a thread servo control signal output from the servo controller 6 so that the semiconductor laser output from the optical pickup 3 traces on a signal track of a predetermined optical disk 1. The driver drives the motor 4. Reference numeral 9 denotes a spindle servo, which uses the spindle servo control signal output from the servo controller 6 to rotate the optical disc 1 at a constant linear velocity (CLV) or a constant rotation speed (CA).
V) is a driver for driving the spindle motor 2 to rotate.

Reference numeral 10 denotes a signal processing unit (DSP),
Based on the RF signal output from the amplifier 5, it performs signal reproduction processing such as EFM demodulation processing, error correction processing, and interpolation processing, and outputs an audio signal (digital signal). 11
Reference numeral denotes a central processing unit (CPU) for controlling the operation of the entire audio reproducing apparatus AU. Although not shown, an internal memory for storing a program, a volume control value of a volume control unit to be described later, and a delay time of an output delay unit, I / O It is composed of ports.
Further, when the karaoke mode is selected by the user, the volume control value and the delay time stored in the internal memory are transmitted to a volume control unit and an output delay unit, respectively, which will be described later. Control.

Reference numeral 12 denotes a D / A converter for converting an audio signal (digital signal) output from the DSP 10 into an analog signal, which is output after passing through a filter (not shown). Reference numeral 13 denotes a CPU 1 which controls the volume of the analog signal output from the D / A converter 12
1 is a volume control unit for controlling the volume control value transmitted from the control unit 1 and, as shown in FIG.
In the adjustment setting mode switched by pressing O, the volume is adjusted to the set volume value. The volume value is set by using the volume VO shown in FIG. 1 in the setting mode, and when the volume is not set, the user can adjust the volume VO in conjunction with the volume VO operation. If the value is increased, this volume control unit 1
The volume of the signal output from 3 also increases.

Reference numeral 14 denotes a memory for storing the audio signal (digital signal) output from the DSP 10, and reference numeral 15 reads the audio signal stored in the memory 14 and delays the reproduced audio output from the volume controller 13 by a predetermined time. 1 to a D / A converter to be described later, and as shown in FIG. 1A, is set to the input delay time in a setting mode switched by pressing a delay time setting button TI. . Reference numeral 16 denotes a D / A converter for converting an audio signal (digital signal) output from the output delay unit 15 into an analog signal, which is output after passing through a filter (not shown).

Reference numeral 17 denotes a mixer for synthesizing the analog signal output from the volume controller 13 and the analog signal output from the D / A converter 16, 18 an amplifier for amplifying the synthesized signal output from the mixer 17, and 19 a speaker. It is. Reference numeral 20 denotes an operation unit for inputting various operations such as a switching operation for switching from another mode to the karaoke mode of the present invention by a user, a switching operation for a volume control mode and a delay time setting mode of a reproduced voice for lyrics recognition, and a volume operation. , 21 are display units for displaying information and states in each mode of the audio reproducing apparatus AU (for example, display of a selected music media, volume display and time display in a setting mode), and the like.

In the above description of the configuration of the audio reproducing apparatus AU, the DSP 10, the D / A converter 12,
Volume control unit 13, memory 14, output delay unit 15, D / A
Although the converter 16 and the mixer 17 are individually configured, they may be configured by a one-chip DSP.

(C) Karaoke Mode Processing FIG. 3 is a flowchart showing the operation processing in the karaoke mode of the present invention. First, the CPU 11 determines whether or not the karaoke button KA (see FIG. 1) of the operation unit 20 is pressed by the user (step 101). If the karaoke button KA is pressed, the volume adjustment value of the reproduced voice for lyrics recognition, and From the internal memory, a delay time indicating how long the playback sound for karaoke is output from the playback sound for lyrics recognition is read (step 102). Next, the CPU 11 stores the read volume control value and the delay time in the volume control unit 1 respectively.
3. Transmit to the output delay unit 15 and set to the value transmitted by each unit (step 103).

Then, the CPU 11 instructs the DSP 10 to output the reproduced audio signal to two systems,
The DSP 10 that has received this outputs audio signals that have been subjected to reproduction processing to the respective processing units in order to generate two reproduced sounds for lyrics recognition and karaoke.
As a result, the processing unit on the volume control unit 13 creates reproduced sound for lyrics recognition with the volume reduced, and the processing unit on the output delay unit 15 generates reproduced sound for lyrics recognition. Further, these generated reproduced sounds are synthesized by the mixer 17, amplified by the amplifier 18, and output from the speaker 19. That is, the karaoke mode of the present invention is set (step 104).

Next, the CPU 11 operates the operation unit 2 of the user.
It is determined whether or not the volume control value or the delay time has been changed by the operation of 0, that is, the operation of the volume control setting button WO, the delay time setting button TI, and the volume VO (step 105). If, CP
U11 stores the changed value in the internal memory, returns to step 102, performs the subsequent processing, and continues the karaoke mode based on the value set by the user. If not changed, it is determined whether or not the karaoke button KA is pressed by the operation of the operation unit 20 by the user (step 106). Here, if the karaoke button KA is pressed, the karaoke mode of the present invention is ended. If the karaoke button KA is not pressed, the process returns to step 104 to continue the karaoke mode.

Although the embodiment according to the present invention has been described with reference to a CD player apparatus, the present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention excludes these. is not.

[0025]

As described above, according to the present invention, a low-volume playback sound is used for lyrics recognition before a playback sound for karaoke is played, so that the user can recall the lyrics and output it later. It is possible to sing along with the karaoke playback sound, and even a driving driver can enjoy karaoke without difficulty.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an outline of the present invention.

FIG. 2 is a block diagram of an audio reproducing device according to an embodiment of the present invention.

FIG. 3 is a flowchart showing an operation process in a karaoke mode of the present invention.

[Explanation of symbols]

 AU Audio playback device VO Volume KA Karaoke button WO Volume control setting button TI Delay time setting button 1. Optical disc 2. Spindle motor 3. Optical pickup 4. Thread motor 5. -RF amplifier 6-Servo controller 7-Focus / tracking servo 8-Thread servo 9-Spindle servo 10-Signal processing unit (DSP) 11-Central processing unit (CPU) 12-D / A converter 13. Volume control unit 14. Memory 15. Output delay unit 16. D / A converter 17. Mixer 18. Amplifier 19. Speaker 20. Operation unit 21. Display unit

Claims (1)

[Claims] A signal acquisition unit for acquiring an audio signal from music media; a volume adjustment unit for adjusting and outputting a volume of the audio signal acquired by the signal acquisition unit; and an audio acquired by the signal acquisition unit. A signal accumulating unit for accumulating a signal; a delay output unit for delaying the audio signal accumulated by the signal accumulating unit by a predetermined time from an audio signal output from the volume adjusting unit; An audio reproducing apparatus comprising: a synthesizing output unit that synthesizes and outputs an audio signal output from the delay output unit.