KR19980082446A - Audio Dubbing Control Method for Composite Products - Google Patents

Abstract

The present invention relates to a method for controlling audio dubbing of a composite product, comprising: a volume level zero setting step of setting a volume level of a sound signal flowing from a CD to an audio deck as zero when an audio dubbing key is applied, and the volume level zero setting If the volume level is set to zero in the stage, the volume level increase stage increases the volume by a certain level. If the volume level increases in this volume level increase stage, it is equal to the increased volume level and the volume level introduced to the first audio. A reference level recording step of making a comparison judgment and a reference level recording step of recording the current volume level if it is determined that the current volume level is equal to the volume level introduced into the first audio as a result of the determination at the reference level reaching decision step; When the key signal for terminating the audio dubbing is input, the volume level decreases by a predetermined level to reduce the volume recorded so far. And a zero level reaching judging step of comparing the volume level to zero if the volume level is decreased by a certain level in this volume level decreasing step, and if the volume level is determined to be zero as a result of the zero level reaching judging step. When audio dubbing is started or blocked, the audio level at the beginning and the end of the recording is changed. Therefore, when recording the sound of a certain part, unexpected volume insertion is suppressed. Improve hearing quality.

Description

Audio Dubbing Control Method for Composite Products

The present invention relates to a method for controlling audio dubbing of a composite product. In particular, the audio dubbing control of a composite product enables a natural sound recording function to be added by variably proposing a sudden sound recording signal when recording audio from CD to audio. It is about a method.

In general, a combination product of VRF and CDP has a function to classify digital signals inferred from CDP's optical pickup device into sound signals and graphic signals and directly record and record the classified signals on magnetic recording media. It is provided to.

Then, referring to FIG. 1, the structure of the above-described conventional composite product will be described with reference to FIG. 1, an optical pickup unit 70 for reading out a recording signal recorded on a compact disc using a laser beam, and the optical pickup unit. A digital signal processor 71 for shaping and demodulating the waveform of the data read by the digital signal into a digital signal, and a digital signal processor 71 detects and converts an audio signal into an analog signal. A converting unit 72, an acoustic signal demodulation unit 73 for detecting only a sound signal through the low pass filter of the signal output from the die converting unit 72, and a graphic signal of the signals digitized by the digital signal processing unit 71. Graphic signal demodulation section 74 for detecting only, and AV signal switching section 7 for switching whether the signal output from the graphic signal demodulation section 74 and the acoustic signal demodulation section 73 is output to the inside or the outside. 5) and the microcomputer 76 which applies the control signal to the AV signal switching unit 75 to determine the input / output of the acoustic signal and the graphic signal, and controls the following functions collectively, and to the control signal of the microcomputer 76. Accordingly, when the AV signal switching unit 75 is connected to be switched inside, the video signal processing unit 76 performs a signal processing to record the video signal introduced therein to the magnetic recording medium, and the AV signal switching unit 75 The audio signal processing unit 77 is modulated with a record bias so as to record the incoming sound signal according to the internal switching of the audio signal, and the amplitude of the recording signal output from the audio signal processing unit 77 is varied. The amplitude of the record bias control unit 78 and the record bias control unit 78 to determine the volume by the intensity control of the microcomputer 76 and the control signal of the microcomputer 76 An electronic volume 79 for changing a bias input resistance value for a side and an output terminal of the record bias control unit 78 and the video signal processing unit 76 are used for storing and reproducing a signal on a magnetic recording medium. The head portion 80 is made.

The audio head unit 80 receives an audio signal from the record bias control unit 78 and records the audio signal according to the sound signal, and an image from the video signal processor 76. It is composed of a video alpha head 82 for receiving a signal to perform a video recording accordingly.

In addition, the AV signal switching unit 75 is connected to an external terminal 83 for inputting and outputting signals to the outside, and a key panel 84 for applying a control signal from a user to an input port of the microcomputer 76. Connected.

Meanwhile, the audio dubbing operation of the conventional composite product having the above configuration will be described.

First, when the CD dubbing function is selected from the user through the key panel 84, the data stored in the compact disc is read at a predetermined frequency by the laser beam through the optical pickup unit 70. The frequency is the digital signal processor 71. Digitize the waveform by using The digitized data is classified into sound data and graphic data, and the classified digital sound data is converted into a linear analog signal through a die conversion unit 72. In addition, the analog signal detects only an audible frequency after the high frequency component is removed through the sound signal demodulator 73 to extract the sound signal, and the image digital data output from the digital signal processor 71 is a graphic signal demodulator 74. The video signal is extracted through the < RTI ID = 0.0 >). ≪ / RTI > The audio signal and the video signal flow into the AV signal switching unit 75. Since the AV signal switching unit 75 is switched to the internal switching connection by the user's audio dubbing function selection, the AV signal switching unit 75 is switched. The audio signal and the video signal introduced into the unit 75 are connected to the audio signal processor 77 and the video signal processor 76, respectively. The video signal processor 76 modulates the incoming video signal and the oscillation frequency for recording, and then transmits the video signal to the video RF head 82. In addition, the audio signal processing unit 77 synthesizes the sound signal introduced thereto and a predetermined oscillation frequency and transmits the synthesized modulation signal to the audio ALhead 81 through the record bias control unit 78. In addition, the record bias control unit 78 is set by the user's key operation, which is a control signal of the microcomputer 76 is applied to the electronic volume 79 according to the record volume control set from the key panel 84. At this time, the applied control signal is a variable amplitude input resistance by varying the acoustic amplitude in the record bias control unit 78 is the recording signal is applied to the audio ALhead (81).

However, in the conventional composite product as described above, when dubbing from the CD player to the audio deck, the recorded audio signal is recorded in the maximum bias state, or the recording level is adjusted from the user. There is a problem that the hearing is degraded due to accidental sound insertion or the user must change the recording level from time to time.

Therefore, the present invention was invented to solve the above-mentioned problems. When the input of the audio dubbing signal is detected, the audio signal output from the CD player is sequentially changed from '0' level to the CD output level, When the audio dubbing complete signal is inputted, the audio signal output from the CD player is sequentially changed from the output level to the '0' level, so that unexpected volume insertion is suppressed when recording the sound of a specific part of the compact disc. An object of the present invention is to provide a method of controlling audio dubbing of a composite product to improve hearing quality.

On the other hand, the present invention for achieving the above object is an AV signal switching process for introducing the audio output signal and the video output signal of the CD player when the audio dubbing key is pressed, and the audio signal in the AV signal switching process It is characterized by consisting of an audio signal level variable process that changes the audio level when it is introduced or blocked.

1 is a functional block diagram showing the audio dubbing of the conventional composite product,

2 is a signal flow diagram according to the present invention,

3 is a flowchart of the present invention.

<Explanation of symbols for main parts of drawing>

4: RF amplifier 5: control signal processor

6: digital signal processing unit 7: CD decoder

8: Aljubi encoder 9: die conversion unit

10: low pass filter 11: AV I / O converter

12: audio signal processor 13: video signal processor

14: Video Mixer 15: Video Alpihead

16: Audio Mixer 19: Oscillation Bias Amplifier

20: micom 26: audio Rp head

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The signal flow diagram of the composite product constructed according to the present invention is a spindle motor 2 for rotating the compact disc 1 on which data is recorded, as shown in FIG. 2, and a compact rotated by the spindle motor 2. An optical pickup device 3 for converting data stored in the disk 1 into a predetermined electrical signal through a laser beam, and an EYE PATTERN signal output from the optical pickup device 3 depending on the presence or absence of pits. RF amplifier 4 for amplifying a, a control signal processor 5 for changing a speed of the spindle motor 2 by receiving a track signal among the amplified signals output from the RF amplifier 4, and the RF A digital signal processor (6) for shaping and digitizing the data signal amplified by the amplifier (4), and a CD decoder (7) for classifying the composite signal among the digitized signals in the digital signal processor (6). Why AUG bi-encoder 8 for synthesizing the color signal applied from the digital signal processor 6 to a composite video signal output from the CD decoder 7 at a constant rate, and the audio data is leaked from the digital signal processor 6. And a low pass filter (10) for detecting only an audio signal of the analog signals outputted through the die converting unit (9), and a voice output from the low pass filter (10). The AV input / output converter 11 for setting the input / output direction change of the input signal by receiving the signal and the video signal outputted through the AV encoder 8 and the output control of the AV I / O converter 11 according to the output control. The audio signal processor 12 converts the audio signal to a predetermined level so that the audio signal can be received and recorded, and the video signal can be received and recorded according to the output control of the AV input / output converter 11. A video signal processor 13 for converting to a constant level, a video mixer 14 for modulating a recording signal applied from the video signal processor 13 and a constant frequency for recording, and the video mixer 14 A video alpha head 15 for inducing magnetic radiation according to a signal output through the audio signal, an audio mixer 16 for modulating a predetermined frequency and a sound signal output from the audio signal processor 12, and the audio mixer 16 An audio alpha head 26 for inducing magnetic radiation in accordance with the signal outputted from the same), a high frequency oscillator 17 for applying a predetermined high frequency to the audio mixer 16 and the video mixer 14, and The oscillation unit 17 receives an oscillation signal from the oscillation unit 17 and is connected to an oscillator 18 for converting to an optimum input impedance and an output terminal for modulation with an audio signal among the output terminals of the opti 18. Signal An oscillation bias amplitude converter 19 for varying the bias amplitude, and a microcomputer 20 for controlling the oscillation bias while controlling the oscillation bias by applying a control signal to the oscillation bias amplitude converter 19. Lose.

In addition, the oscillation bias amplitude converter 19 receives a control signal from the microcomputer 20 and the electronic volume 21 whose resistance is varied according to the input signal and the resistance set by the electronic volume 21. It is composed of a bias control unit 22 that the amplitude of the oscillation bias is variable.

In addition, a switching transistor 23 is connected to the high frequency oscillator 17 so that high frequency oscillation can be performed according to a control signal of the microcomputer 20, and an operation for external control of a user is input to the input port of the microcomputer 20. The panel 24 is connected, and the AV I / O converter 11 is connected to an external terminal 25 for connection with an external signal.

On the other hand, look at the operation of the present invention made of such a configuration as follows.

First, when the audio dubbing key using the operation panel 24 is input from the user, the signal output from the optical pickup device 3 is amplified to a predetermined level through the RF amplifier 4, and then the digital signal processing unit 6 is operated. After this, the amplified signal is standardized, and the standardized amplified signal is converted into a digital signal. The converted digital signal is classified into a graphic signal and an audio signal. The audio signal is converted into an analog signal through the die conversion unit 9 and is detected and output only an acoustic signal through the low pass filter 10. .

At this time, the control signal of the signal amplified by the RF amplifier 4 is input to the microcomputer 20 via the control signal processor 5, wherein the microcomputer 20 is a control signal processor 5 corresponding to the control data Will be sent). Then, the control signal processor 5 drives the spindle motor 2 according to the input control data. In addition, the signal digitized by the digital signal processor 6 detects the composite signal through the CD decoder 7 and synthesizes the color signal through the AV encoder 8 to output an image signal.

Then, the audio signal output through the low pass filter 10 and the video signal output through the AV encoder 8 are introduced into the AV I / O converter 11. In addition, the AV I / O converter 11 receives the audio dubbing signal from the microcomputer 20 and disconnects the signal to the outside, and each signal is transmitted to the video signal processor 13 and the audio signal processor 12. . At this time, the video signal introduced into the video signal processor 13 is modulated with a predetermined high frequency through the video mixer 14 to radiate the magnetic force line corresponding to the video signal by the video ALhead 15. The audio signal introduced into the audio signal processor 12 is transmitted to the audio ALhead 26 through the audio mixer 16. In this case, the amplitude modulated frequency obtained by combining the high frequency signal and the acoustic signal with the audio mixer 16 is provided. Is applied. The oscillation signal output from the high frequency oscillation unit 17 oscillating a predetermined frequency is introduced into the oscillation bias amplitude variable unit 19 via the OPTI 18, and the oscillation bias introduced into the oscillation bias amplitude variable unit 19. The signal amplitude is varied according to the control signal of the microcomputer 20 and synthesized by the audio mixer 16, thereby raising or lowering the level of the recorded sound volume.

That is, as shown in FIG. 3, the process proceeds to the audio dubbing key input step S2 for inputting an audio dubbing key from a user through an initialization state S1 where power is supplied to the system and initial settings in the circuit are performed. Then, in the audio dubbing key input step (S2), if the signal input is made according to the pressing of the audio dubbing key for recording the sound recorded on the CD, the AV signal switching step of switching the flow of the audio signal and the video signal (S3). To proceed. At this time, if the switching connection is made so that the audio signal and the video signal flow into the own deck in the signal switching step S3, the volume level zero setting step of setting the volume level of the audio signal as the audio signal to zero proceeds to step S4. do. Then, the volume level increasing step S5 of raising the volume set to zero to the predetermined level in the volume level zero setting step S4 is performed. At this time, if the volume is increased to a predetermined level in the volume level increasing step (S5), the process proceeds to the reference level reaching judging step (S7) for determining whether the volume level is equal to the initial audio output level. If the result of the determination in the reference level reaching decision step S7 is not the same as the initial audio output level, the control proceeds to the setting level recording step S6 for recording at the current volume level. Then, the set level recording step (S6) is to record at the volume level raised in the volume level increase step (S5), at this time, the volume level increase step (S5) to increase the volume level again after recording for a predetermined time Is switched to.

In addition, the volume level is increased through the volume level increasing step S5, and the loop is repeatedly executed, and as a result of the determination of the reference level reaching step S7, the currently increased volume level is equal to the initial audio output level. If it is determined, the control proceeds to the reference level recording step (S8) for recording at this audio output level. When the process of recording to the audio output level is completed in the reference level recording step S8, the process proceeds to the dubbing stop key input step S9 by a key input to stop dubbing from the user. Then, proceeding to the volume level reduction step (S10) to gradually decrease the volume level recorded to date to reduce the volume recorded to date to a certain level, and at this time the volume level zero reaching judging step to determine whether the reduced volume level is zero Proceed to S12. If it is determined that the volume level is not zero as a result determined in the volume level zero reaching judging step S12, the process proceeds to the setting level recording step S11 in which the volume level is currently reduced. Then, the set level recording step (S11) is to perform the recording of the volume level currently set for a predetermined time, and then switch back to the volume level reduction step (S10). In addition, the loop is repeatedly performed by reducing the volume level currently recorded in the volume level decreasing step S10 by a predetermined level. In this case, there is no volume to be recorded as a result determined in the volume level zero reaching judgment step S12. In other words, if it is determined that the volume level is zero, the process proceeds to the dubbing stop step (S13) in which the dubbing process of the system is finished.

As described above, when the audio dubbing part of the compact disc is gradually increased or decreased, the volume level of the first and the end portions of the compact disc is prevented from being suddenly recorded, thereby improving the hearing during audio dubbing.

Claims (1)

When the audio dubbing key is applied, the volume level zero setting process sets the volume level of the sound signal flowing from the CD to the audio deck to zero. When the volume level is increased, and the volume level is increased to a certain level, the reference level reaching process for comparing the volume level with the volume level introduced to the first audio is reached. As a result of the determination process, if it is determined that the current volume level is equal to the volume level of the first audio input, the reference level recording process records the current volume level, and the result of the determination of the reference level reaching process. If the level is judged to be not equal to the volume level of the original audio, the setting is recorded at the currently increased volume level. If the volume level is decreased by a certain level during the temporary level recording process, the volume signal recorded so far when the key signal for ending the audio dubbing is input, and the volume level is reduced during the volume level reduction process, the volume level is zero. The zero level reaching judgment process for comparing the decision, the result determined in the zero level reaching judgment process, the audio dubbing completion process for stopping audio dubbing when it is determined that the volume level is zero, and the result determined in the zero level reaching judgment process. If it is determined that the volume level is not zero, the audio dubbing control method of the composite product, characterized in that the set-down level recording process to record at the current volume.