JPH0734499U - Recording medium playback device - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a karaoke apparatus that is easy for beginners to use, even if the singing is not understood, and it is easy to match the timing with the accompaniment. [Constitution] The control unit 12 detects the operation of the switch unit 34 and reproduces the music recorded on the CD 10. The audio signal from the microphone is input to the mix output unit 28 via the input circuit 30, and is mixed there with the music signal reproduced from the CD 10. In this CD 10, the accompaniment and the vocal are recorded on different channels, and this vocal is used as a start signal for singing. The audio signal from the microphone is input to the input circuit 30 and the A / D converter 32.
It is also input to the control unit 12 via. During playback,
If there is no input signal from the microphone at the beginning of the vocal,
When the silent state continues for a predetermined time, the reproduction of the CD 10 is stopped. The control unit 12 searches for the vocal start position and sets it in the pause state. At the same time when the input signal is generated in the microphone, the reproduction of the CD 10 is restarted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a recording medium reproducing device suitable for use in, for example, a karaoke device.

[0002]

[Prior art]

 Recently, karaoke devices have become popular and have become popular, and have become popular entertainment devices. The number of age groups to be used has expanded, the capacity of recording media has also increased due to the use of laser disks, etc., and the installed songs have become diversified and the rate of change has become faster. The number of users has expanded not only to the limited enthusiasts at the beginning of the spread, but also to school groups and families.

Under such a background, the functions required of the karaoke device are also changing. Simply put, a device that people can enjoy easily, young and old, is preferred.

In karaoke, the first step to successfully ride an accompaniment is to match the start. When singing a song along with an accompaniment, it is not so easy for a beginner to adjust the timing of singing. Also, even if a person frequently uses karaoke, it is not always so easy to match the start time when singing a song for the first time. In order to get a good start, you need some experience with the song.

In order to match this timing, a method of changing the color of the lyrics display on the display screen has been generally used conventionally.

[0006]

[Problems to be solved by the device]

 It can be said that the above method is suitable for adjusting the singing speed. However, even if such a method is used, the start timing is often unknown. Further, this method cannot be applied to a karaoke device in which a display device is not prepared.

The present invention has been made in view of such a situation, and it is possible to realize a karaoke device which is easy to use for beginners even if the singing is not understood, and the timing is easily matched with the accompaniment. An object is to provide a reproducing device.

[0008]

[Means for Solving the Problems]

 The recording medium reproducing apparatus of the present invention reproduces a recording medium (for example, the compact disc 10 in FIG. 2) on which an accompaniment signal and an input instruction signal whose timing is synchronized with the accompaniment signal, and reproduces a predetermined input signal. In a recording medium reproducing apparatus for outputting together with an accompaniment signal reproduced from a medium, a reproducing means (for example, the pickup 20 in FIG. 2) for reproducing a signal recorded on the recording medium and a reproduced signal reproduced from the recording medium, First detecting means for detecting the input instruction signal (for example, step S808 in the program of FIG. 8) and measuring means for measuring the time from when the input instruction signal is detected by the first detecting means (for example, Step S854 in the program of FIG. 8), a second detecting means for detecting the input signal (for example, step S802 in the program of FIG. 8), and a measuring hand. And the control means (for example, steps S824 and S842 in the program of FIG. 8) for controlling the reproduction state of the recording medium corresponding to the time measured by the second detection means and the detection result of the second detection means. Characterize.

The control means causes the reproducing means to be in the paused state when the time measured by the measuring means reaches a preset predetermined reference time in a state where the second detecting means does not detect the input signal. Can be

Further, at this time, the reproducing means can be returned to the detection position of the input instruction signal and put into the pause state.

Further, the input instruction signal can be a vocal signal recorded corresponding to the accompaniment signal, or a music signal including an input signal of a predetermined musical instrument.

[0012]

[Action]

 In the recording medium reproducing apparatus having the above structure, the reproducing state of the recording medium is controlled in accordance with the time measured by the measuring means and the detection result of the second detecting means. Therefore, it is possible to easily match the timing of the accompaniment signal and the input signal.

[0013]

【Example】

 Next, an embodiment of a recording medium reproducing apparatus according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a compact disc player to which the recording medium reproducing apparatus of the present invention is applied. As shown in the figure, a lid 52 is openably and closably supported on the main body 51. When the pressing portion 53 is pressed, the lid 52 is opened with respect to the main body 51, and the compact disc 10 (FIG. 2) can be mounted.

On the right side of the lid 52, a display unit 54 made of, for example, an LCD (liquid crystal display device) is formed above the lid 52. On the display unit 54, the titles and the like of the songs reproduced from the compact disc are displayed as needed.

Various buttons are arranged below the display unit 54. The button 55 is a power button and is operated when turning the power on or off. The button 56 is a playback button and is operated when starting playback of the compact disc. Button 57 and button 58 are a pause button and a stop button, respectively, and are used to temporarily stop (pause) the reproduction operation or to stop the reproduction operation. Further, the skip buttons 59 and 60 are respectively operated when skipping a music piece to be reproduced in the forward direction or the reverse direction.

Further, the button 61 is operated to turn off the vocal among the accompaniment sounds reproduced from the compact disc. The button 62 is operated when setting a wait mode described later.

FIG. 2 shows the internal structure of this compact disc player. This device includes a control unit 12 that controls the operation of the entire apparatus, a disk drive unit 16, a pickup drive unit 18, a pickup 20, a signal processing unit 22, a D / A conversion unit 24, a gate circuit 26, and a mix output unit 28. , An input circuit 30, an A / D conversion section 32, a switch section 34, and a display section 54.

The control unit 12 is composed of, for example, a microcomputer (CPU), and controls driving of the compact disc (CD) 10, reproduction control of information recorded on the CD 10, reception of operation switch signals, and display of various information. It has a function to drive.

The disk drive unit 16 drives the CD 10 at a predetermined rotation speed (constant linear velocity). The pickup driving unit 18 moves the pickup 20 to a reproduction start position, and performs focus control and tracking control of the pickup 20. The pickup 20 detects a signal such as a voice signal or a subcode recorded in the CD 10 in advance by a laser beam, converts the detected signal into an electric signal, and outputs the electric signal.

The signal processing unit 22 receives the reproduction signal output from the pickup 20 as an input, and checks the presence or absence of an error in the input signal, corrects the error signal, corrects the error signal, and the like. The D / A conversion unit 24 receives the digital audio signal from the signal processing unit 22 and converts it into an analog audio signal of L and R channels. The gate circuit 26 selects the output of the reproduced L channel and R channel audio signals. The mix output unit 28 mixes the reproduced sound and the vocal sound from the input circuit 30, amplifies the sound, and outputs the sound to a speaker (not shown).

A signal obtained by collecting a song sung by the user with a microphone (not shown) is input to the input circuit 30, and the input circuit 30 amplifies and outputs the audio signal. The A / D converter 32 converts the analog audio signal from the input circuit 30 into a digital signal and outputs the digital signal to the controller 12.

The operation switch section 34 is composed of various switches in addition to the buttons 55 to 62 of FIG.

Next, the reproducing operation of this embodiment will be described with reference to the flowcharts shown in FIGS. Of these flowcharts, FIG. 3 shows the main routine, and FIGS. 4 to 8 show the subroutine.

The main routine of FIG. 3 is started when the power of the recording medium reproducing apparatus is turned on. Prior to the start of reproduction, the initial processing of step S10 of FIG. 3 is first performed. The contents of this initial processing are shown in the subroutine of FIG. 4, and in steps S202 to S208, the flag PLF indicating the reproduction state, the flag PSF indicating the pause state, the flag WTF indicating the wait mode, and the predetermined time β ( Each flag of a flag TMF, which indicates counting (time measurement) (see FIG. 9, which will be described later), is initialized (set to 0). These flags are used on the assumption that the progress of step processing is identified, as described later. In addition, in the subroutine of FIG. 4, in addition to this, processing necessary for the operation of the present apparatus is performed in advance.

After such initial processing, the presence / absence of the CD 10 is checked in step S20 of FIG. If the CD 10 is not set in the device, the process proceeds to step S28, waits for a predetermined time, and waits for the CD 10 to be set. When the CD 10 is set, the table of contents (TOC) data of the disc is read in step S22.

That is, the control unit 12 controls the pickup driving unit 18 to move the pickup 20 to the innermost circumferential position of the CD 10 and read the TOC data recorded therein. The TOC data is demodulated by the signal processing unit 22 and error-corrected, then supplied to the control unit 12 and stored in the internal memory. By reading this TOC data, it is possible to know the recording state of the set CD 10, such as the track start address, end address, and playing time.

Next, in step S 24, a switch scan is executed to search the state of the switch section 34. If neither button has been operated, the process proceeds to step S27. When the reproduction button (button 56 in FIG. 1) is operated, the reproduction start process of step S30 is executed. The contents of the reproduction start process (S30) are shown in the subroutine of FIG. 5, and it is checked in step S302 whether or not the reproduction process is executed first. That is, when the reproduction flag PLF is 0 (when not in the reproduction state now), reproduction is started (S304), the flag PLF is set to 1 (S306), and then the process returns to the main routine.

However, if the flag PLF is 1 in the check in step S302, it means that the button 56 has already been operated during the playback operation, and it is an erroneous operation. Therefore, the main routine is immediately executed without any processing. Return.

When the stop button (button 58 in FIG. 1) is operated, the reproduction stop process is executed in step S40 in FIG. The content of this reproduction stop processing (S40) is shown in the subroutine of FIG. 6. In step S402, it is determined whether or not reproduction is in progress (PLF = 1), and if the flag PLF is 1 (reproduction is in progress). In this case, the reproduction is stopped (S404), the flag PLF is initialized (S406), and the process returns to the main routine. If the flag PLF is not 1 in the check in step S402, it means that the button 58 has been operated during the stop, which is an erroneous operation. Therefore, the main routine is immediately returned without performing any special processing.

When the wait button (button 62 in FIG. 1) is operated, the wait mode start processing of step S 50 in FIG. 3 is executed. The contents of this wait mode start processing (S50) are shown in the subroutine of FIG. 7. In step S502, it is determined whether or not the wait mode (WTF = 1) is currently set, and the flag WTF is set to 1. In the case (wait mode), the flag WTF is initialized (S504). That is, the wait mode is released.

Next, the flag TMF indicating that the predetermined time β is being counted is checked (S506), and if it is 1 (when counting (while measuring time)), the time counting is stopped (S508), If the flag TMF is not 1 (not counting (time counting)), the time counting stop processing (S508) is not necessary, so skip this processing and proceed to step S510.

In step S510, the pause flag PSF is checked, and if the flag PSF is 1 (in the case of pause), the pause release processing (S512) is performed. If it is not 1 (not in the pause), that processing is unnecessary. , Skip this and return to the main routine.

When the flag WTF is not 1 (not in wait mode) in the check in step S502, the flag is set to 1 (wait mode is set) (S514), and the process returns to the main routine.

When any other switch is operated, the process corresponding to each switch is executed in step S60 of FIG.

When the opening / closing of the lid 52 is detected (a switch (not shown) is provided in the main body 51 for this detection), the process proceeds to step S70, and the processing when the lid is opened, For example, after stopping the disk drive unit 16 or the like, the process returns to step S20 and waits until the disk is mounted.

After the processing of step S30, S40, S50 or S60, the process proceeds to steps S72 and S74, and when the wait mode flag WTF and the reproduction flag PLF are both 1 (when the wait mode is set and the reproduction state is set). ) Executes the wait mode process of step S80.

That is, when the user wants to match the accompaniment sound to the performance sound (own song) (to execute the wait mode processing), the user operates the button 62 to set the wait mode ( WTF = 1 is set in step S514 of FIG. 7) and the button 56 is operated to start reproduction of the CD 10 (PLF = 1 is set in step S306 of FIG. 5). However, the operation order of the buttons 62 and 56 may be reversed.

The details of the wait mode process (S80) are shown in FIG. First, the input signal from the microphone input from the input circuit 30 is input to the control unit 12 via the A / D conversion unit 32, the level thereof is detected (S802), and the detected value is stored in the register MIC. Next, when the flag PSF is 0 in the check of step S804 (when it is not pause), the L channel of the reproduced sound of the CD 10, that is, the input level of the vocal is detected (in this embodiment, the CD 10 has Vocal is recorded in the channel and accompaniment sound is recorded in the R channel), and the detected value is stored in the register VPT (S808).

That is, when the button 56 is operated to start the reproduction in step S304 of FIG. 5, the signal reproduced by the pickup 20 from the CD 10 is input to the signal processing unit 22 and the signal is re-adjusted and error correction and correction are performed. Is processed. This signal (digital signal) is converted into an analog signal by the D / A conversion section 24, and then supplied to the mix output section 28 via the gate circuit 26, and further output to the speaker from there. At this time, if the vocal off button 61 is not turned on, both the accompaniment sound (R channel signal) and the corresponding recorded vocal (L channel signal) are output.

When functioning as karaoke, this button 61 is normally turned on. At this time, the control unit 12 controls the gate circuit 26 to mute the signal of the L channel. The mix output unit 28 mixes the audio signal from the input circuit 30 with the L channel signal from the gate circuit 26 and outputs the mixed signal. Therefore, in this case, the accompaniment signal is output from the R channel of the speaker and the L channel is output from the L channel. The user's voice signal will be output.

However, even if the button 61 is turned on and the vocal is turned off, since the signal of the L channel reproduced from the CD 10 is supplied from the signal processing unit 22 to the control unit 12, the level of this vocal is changed. It is possible to detect.

Next, in steps S810 and S812, it is determined whether or not the input level to the microphone is less than a predetermined threshold value α, and whether or not the vocal reproduction level is greater than or equal to the threshold value α.

When there is an input from the microphone (when MIC ≧ α) or when there is no vocal in the audio signal reproduced from the CD 10 (when VPT <α), the process proceeds to step S 814. Then, it is determined whether or not the flag TMF indicating whether or not the time is being measured is 1. In this case, since TMF = 0 is set in step S208 of FIG. 4, the wait mode process of FIG. 8 ends.

Therefore, the process proceeds to step S82 in FIG. 3 and, after waiting for a predetermined time, returns to step S24 to execute the switch scan process, and in step S26, the process corresponding to the operated switch is executed. In this case, the switch is not operated because the user is singing the song in a normal state. Therefore, in this case, the process proceeds from step S26 to step S72. That is, in this case, steps S72, S74, S802, S804, S808, S810 (S812), S814, S24, and S26 are repeatedly executed. In this state, practically no special processing is executed.

On the other hand, in steps S810 and S812 of FIG. 8, when it is detected that there is no input from the microphone and the vocal from the CD 10 is reproduced, the process proceeds to step S816, and the time is being measured. It is determined whether or not (whether TMF = 1). In this case, since the time measurement has not started yet, the process proceeds to step S850, the current position of the CD 10 is read by the control unit 12 from the subcode included in the reproduction signal, and stored in the register VSP. That is, the position where the vocal starts is stored in the register VSP.

Next, proceeding to step S852, after resetting the register TIM to 0, in step S854, the control unit 12 counts the built-in clock and starts the operation of setting the count value in the register TIM. Next, proceeding to step S856, since the time measurement has started at step S854, 1 is set in the flag TMF.

As described above, the wait mode process is ended, and the wait mode process of step S80 is started again through steps S82, S24, S26, S72, and S74 of FIG.

In the wait mode process, the microphone input level is set in the register MIC again in step S802, and the vocal level is set in the register VPT in step S808. Then, in steps S810 and S812, the level of the signal input from the microphone and the vocal level are compared with the threshold value α, and when there is no input from the microphone and the vocal reproduction sound is present, In step S816, it is determined whether the time is being measured (whether TMF = 1 or not).

In this case, since TMF = 1 is set in step S856, the process proceeds to step S818, and the register T IM indicating the time from the position where the vocal starts is equal to or larger than the preset reference value β. Is determined. The time measurement process is continued until there is no input from the microphone and the vocal playback sound is present until the reference time β is reached.

When it is determined in step S818 that the time during which there is no input from the microphone and the vocal playback sound exists until the reference time β is reached from the beginning position of the vocal, the process proceeds to step S820 and the CD 10 The reproduction of is ended and the position VSP on the CD 10 is searched. This position VSP is the position where the vocal starts, which is detected in step S850.

That is, the control unit 12 controls the pickup 20 via the pickup driving unit 18, and moves the pickup 20 to the position set in the register VSP in step S850. Then, the process advances to step S824 to set a pause state. Correspondingly, in step S826, 1 is set in the flag PSF indicating the pause state.

Further, proceeding to step S828, the clock counting operation started at step S854 is stopped, and correspondingly, a flag T MF indicating whether or not measurement is in progress is set to 0.

After executing the wait mode process as described above, the process returns to the wait mode process of step S80 again through steps S82, S24, S26, S72 and S74 of FIG.

Then, in step S 802 of FIG. 8, the microphone input level is set again in the register MIC, and in step S 804, it is determined whether or not the pause state. In this case, since it is in the pause state, the process proceeds from step S804 to step S840, and it is determined whether or not the microphone input level set in step S802 is equal to or larger than the threshold value α. That is, the CD 10 is now in the pause state and the reproduction is suspended. In this state, it is determined whether or not the user has input an input signal from the microphone.

When the user still does not input the voice signal, the wait mode process is ended.

Then, after the processing of steps S82, S24, S26, S72, and S74 of FIG. 3, the process returns to the wait mode processing of step S80.

When the user has not input a voice signal from the microphone yet, the processes of steps S802, S804 and S840 of FIG. 8 are repeatedly executed.

In the paused state, when the user inputs a voice signal from the microphone, the process proceeds from step S840 to step S842 to cancel the paused state. Then, correspondingly, the flag PSF is set to 0.

As a result, the reproduction of the CD 10 is started again from the head position of the vocal stored in the register V SP in step S850. That is, although the vocal was reproduced from the CD10, the user did not input a voice signal from the microphone (does not start singing) even if the time β passed from that time, so the reproduction was paused. However, when the user starts singing, the reproduction of the CD 10 is restarted accordingly. Therefore, the singing timing coincides with the accompaniment.

After the wait mode process is completed as described above, the processes of steps S82, S24 and S26 of FIG. 3 are performed again, and the process corresponding to the new input is executed.

It should be noted that, even though the vocal from the CD 10 has started, there is no input from the microphone, so in the state where the time measurement has started, before the time TIM reaches the reference time β, in step S810. , If it is determined that the input from the microphone has occurred, or if it is determined in step S812 that the vocals have disappeared, it is during the time period currently being measured (because TMF = 1). From step S814 to step S828, the time counting operation is stopped (stopped), and correspondingly, the flag TMF is set to 0 in step S830.

That is, in this case, the CD 10 is continuously played back without being paused.

The above reproduction operation will be further described with reference to the timing chart of FIG. 9, (A) is an accompaniment sound reproduced from the R channel of the CD 10, (B) is a vocal reproduced from the L channel, and (C) is input to the input circuit 30. Each signal from the microphone is shown. In these figures, a high level indicates that a signal (a signal having a level of α or higher) exists, and a low level indicates that a signal (a signal of a level of α or higher) does not exist. Further, FIG. 9D shows the reproduction position of the CD 10.

Now, at time t ₀ , the reproduction of the CD 10 is started and the accompaniment sound of the R channel is output. That is, the pickup 20 reproduces the signal recorded on the CD 10, and the reproduced signal is supplied to the signal processing unit 22. The signal processing unit 22 demodulates the input signal, performs error correction and correction, and outputs the signal to the D / A conversion unit 24. The D / A converter 24 converts the input signal from a digital signal into an analog signal, and outputs the analog signal to the mix output unit 28 via the gate circuit 26.

At time t ₁ , the vocal of the L channel is started (FIG. 9 (B)). However, at this time, the user's voice signal is not input from the input circuit 30 (FIG. 9 (C)). If such a state continues for time β, at time t ₂ , the control unit 12 controls the pickup 20 via the pickup driving unit 18 to return the pickup 20 to the position where the vocal started. Then, at that position, the robot stands by in a paused state.

Next, at time t ₄ , when the user's voice signal is input from the input circuit 30 (FIG. 9C), the control unit 12 controls the pickup 20 via the pickup driving unit 18. , Cancel the pause from that point and resume playback. As a result, the accompaniment sound of the R channel is output from the mix output unit 28 from time t ₄ . Also, at this time, the microphone input signal input from the input circuit 30 at the same time is output from the L channel of the mix output unit 28 to a speaker (not shown).

On the other hand, when the vocal starts again from time t ₅ after the absence of the L channel vocals, the time from this time t ₅ to the time t ₆ when the microphone is input is shorter than the reference time β. In some cases, the CD 10 is not paused and is continuously played as it is.

It should be noted that the above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, in the above-described embodiment, the R channel is set as accompaniment and the L channel is set as vocal, but the reverse may be set. It is also possible to record a flag indicating the presence or absence of vocals in the subcode of the CD and detect it.

Further, one of the L channels may be a music signal of a musical instrument such as a piano, and the R channel may be a music signal of an orchestra, so that it can be configured for piano practice.

Further, the recording medium is not limited to a CD, but a digital audio tape (DAT), a mini disk (MD), a digital cassette tape (DCC), an analog cassette tape, a hard disk (HD), a video disk (LD), a memory card. Etc., various things are applicable.

[0072]

As described above, according to the recording medium reproducing apparatus of the present invention, the reproducing state of the recording medium is controlled according to the time measured by the measuring means and the detection result of the second detecting means. Since it is possible to generate the accompaniment sound in time with singing or playing a musical instrument, for example, in a karaoke device, even if the singing is delayed, the accompaniment sound can be adjusted to the delayed singing. Produce an effect.

[Brief description of drawings]

FIG. 1 is a plan view showing a planar configuration of a compact disc player to which a recording medium reproducing device of the present invention is applied.

FIG. 2 is a block diagram showing an internal configuration of the embodiment shown in FIG.

FIG. 3 is a flowchart illustrating the operation of the embodiment of FIG.

FIG. 4 is a flowchart illustrating a more detailed process of the initial process of step S10 of FIG.

5 is a flowchart illustrating a more detailed process of the reproduction start process of step S30 of FIG.

FIG. 6 is a flowchart illustrating a more detailed process of the reproduction stop process of step S40 of FIG.

FIG. 7 is a flowchart illustrating a more detailed process of a wait mode start process of step S50 of FIG.

FIG. 8 is a flowchart illustrating a more detailed process of a wait mode process in step S80 of FIG.

FIG. 9 is a timing chart illustrating the operation of the embodiment of FIG.

[Explanation of symbols]

 10 compact disc (CD) 12 control unit 16 disc drive unit 18 pickup drive unit 20 pickup 22 signal processing unit 24 D / A conversion unit 26 gate circuit 28 mix output unit 30 input circuit 32 A / D conversion unit 34 switch unit 51 main body 54 display 55 to 62 buttons

Claims (5)

[Scope of utility model registration request] 1. A recording medium that reproduces a recording medium on which an accompaniment signal and an input instruction signal whose timing is synchronized with the accompaniment signal are reproduced, and outputs a predetermined input signal together with the accompaniment signal reproduced from the recording medium. In the reproducing device, reproducing means for reproducing the signal recorded on the recording medium, first detecting means for detecting the input instruction signal from the reproduced signal reproduced from the recording medium, and the first detecting means. Measuring means for measuring time from the time when the input instruction signal is detected by means, second detecting means for detecting the input signal, time measured by the measuring means, and second detecting means And a control means for controlling the reproduction state of the recording medium in accordance with the detection result of 1. 2. The reproduction means, when the time measured by the measuring means reaches a predetermined reference time set in advance in a state where the second detecting means does not detect the input signal. The recording medium reproducing apparatus according to claim 1, wherein the means is in a pause state. 3. The recording medium reproducing apparatus according to claim 2, wherein the control means returns the reproducing means to a detection position of the input instruction signal and puts it in a pause state. 4. The recording medium reproducing apparatus according to claim 1, wherein the input instruction signal is a music signal recorded corresponding to the accompaniment signal. 5. The recording medium reproducing apparatus according to claim 4, wherein the music signal is a vocal or an input signal of a predetermined musical instrument.