KR100343436B1 - A method and a device of mixing for audio cd - Google Patents

Abstract

The present invention relates to reading and mixing audio signals from CDs, and more particularly, to mixing and inserting audio signals recorded in a specific section of the CD, recorded and stored in a memory, and then to signals reproduced normally by a user's needs. The present invention relates to an audio CD apparatus and method for mixing audio CDs, comprising: a mechanical part, an amplifier part, a servo part, a DS part, a DA, a driver part, and a PC, in which an encrypted data signal applied from the amplifying part is received. A servo unit for separating and outputting an operation state confirmation signal and a digital audio signal of the mechanism unit, respectively, and performing error correction and decryption processing on an encrypted digital audio signal applied from the servo unit under the control of the sipe oil, DS with variable bit rate and reverse playback, A compression / decompression unit which decompresses and outputs a digital signal applied by control and simultaneously decompresses and outputs a compressed signal, and stores a signal received from the compression / decompression unit under control of the sipe oil in a designated area. And a memory for outputting a signal stored in a designated area to the compression / decompression unit, so as to sample and broadcast a signal of the same channel or another channel using one CD driver device. There is an effect that can be repeatedly inserted and mixed in the channel.

Description

Mixing device and method of audio CD {A METHOD AND A DEVICE OF MIXING FOR AUDIO CD}

The present invention relates to reading an audio signal, which is an audible signal, from a specific channel of a compact disk (CD) in which an audio signal is digitally mixed, and outputting the mixed audio signal to another channel or the same channel. In particular, the audio signal recorded in a specific section of the compact disc or CD is read, recorded and stored in a memory, and then simply reproduces the signal stored in the memory to an audio signal normally reproduced by a user's needs. Or mixing or inserting a reverse audio and pitch variable to mix or insert a new audio signal, i.e., a techno music capable mixing device and It is about a method.

The compact disc or CD may record or collect a signal or data in a digital manner, and read the signal or data in an optical manner using a laser. The optical signal is converted into an electrical signal and output.

Such an optical CD has the advantage that a large amount of signals can be recorded in a small area by using a laser, the advantage that the recorded signal or data does not change even after a long time, and fine scratches on the CD. Data containing data used for audio CDs, computers, etc. that record voice and music signals due to the advantage of no problem in the perfect reproduction of the recorded signal even if there is a small amount of foreign matter such as dust. The usage range is rapidly spreading to CDs for video recordings and CDs for recording video and audio signals at the same time.

Generally, a device for reading, reproducing, and outputting data or signals recorded on a CD includes a single channel (CH) or a track (Track). The signal was output, and two channels of signal could not be read and output after being mixed or inserted.

Hereinafter, an audio CD device according to the prior art will be described with reference to the accompanying drawings.

1 is a functional block diagram of an audio CD device according to an embodiment of the prior art.

Referring to the accompanying drawings, a prior art audio device includes a motor for rotating the audio CD at a predetermined speed, a data signal recorded in a designated channel using a laser from the audio CD, and converted into an electrical signal for output. Mechanism section 10 consisting of a pickup,

The amplifying unit 20 receives the signal output from the mechanism unit 10, compensates the characteristic change caused by the transmission line, and amplifies and outputs the signal with an appropriate level signal. Wow,

Servo unit 30 for analyzing the signal received from the amplifying unit 20 to separate the mechanical unit operation confirmation signal and the digital data signal;

Digital signal processor (DSP) or DS skin 40 which receives the digital data signal from the servo unit 30 and processes and outputs error correction and decoding. ,

A digital analog converter (DAC) or die 50 for converting and outputting a digital signal received from the DS skin 40 to an analog signal;

It monitors and controls each part of the CD device and receives and processes a mechanism part operation confirmation signal from the servo unit 30 to determine whether the mechanism part 10 is operating normally in a controlled state, and determines the mechanism part ( If 10) does not operate normally, the CPU (60) to output the corresponding control signal,

By generating and processing a signal for controlling the normal operation of the mechanism unit 10 under the control and monitoring of the CPU 60, a conversion generation signal for controlling the motor and the pickup of the mechanism unit 10 to operate normally. And a driver unit 70 for converting to a constant level and applying the same to the mechanism unit 10.

Hereinafter, an audio CD device according to the related art having the above configuration will be described in detail with reference to the accompanying drawings.

The CD 10 is rotated by a spindle motor which rotates the CD at a constant speed, and the pickup searches for a selected channel among a plurality of channels included in the CD. The digital signal recorded by the laser is read from the found channel, and then converted into an electrical signal and output.

The amplifying unit 20 receiving the signal output from the instrument unit 10 compensates for the characteristic change of the digital signal generated when the instrument unit 10 reads and transmits the digital signal from the CD. Equalizing) and at the same time, amplifies to an appropriate level and outputs.

The servo unit 30 processes a digital signal applied from the amplifying unit 20 to separate a confirmation signal and a data signal which can confirm whether the mechanism unit 10 is operating normally, and the confirmation signal is the CPU ( 60), and the data signal is applied to the DSP unit 40.

The CPU 60 monitors and controls all parts of the device, and analyzes the confirmation signal received from the servo unit 30, thereby controlling the motor and the pickup, which are the operating parts of the mechanism unit 10, in a controlled state. At the same time, it is determined whether to maintain the normal operation state, and when the normal operation is not maintained as described above, a corresponding control signal is output to the driver unit 70.

The driver unit 70 processes a control signal for controlling the mechanism unit 10 applied from the CPU 70 to convert the driver unit 70 into a signal for directly controlling the operation of the motor and the pickup of the mechanism unit 10. It is converted to an appropriate level and applied to the corresponding motor and pickup of the mechanism unit 10, respectively.

Accordingly, the mechanism unit 10 can accurately find the corresponding channel and read the necessary signal by the continuous closed loop control as described above.

In addition, the DSP unit 40 processes the digital data signal received from the servo unit 30 by monitoring and controlling the CPU 60 to correct an error of the data and simultaneously encrypt the data. The decoded digital data signal is decoded and output.

The DAC unit 50 converts the digital signal, which has been error corrected and decoded from the DSP unit 40, into an analog signal and outputs the analog signal, thereby converting the digital audio signal contained in the CD into analog. The audio signal is output.

The audio CD device according to the prior art operating in the above-described configuration uses a single audio CD device to read a signal of a specific other channel, to mix and reproduce the signal of another channel, to reproduce and output or to a necessary section. There is a problem that two (2) or more audio CDs must be used since the part of the part cannot be inserted and played and output.

In addition, the transmission speed of the Sub CH signal inserted or mixed according to the user's intention is varied, and the normal playback is performed after the reverse sampling process is performed. There was a problem that the above insertion and mixing is not performed on the signal of the main channel that is broadcasted.

According to the present invention, an audio CD can be mixed and inserted into a signal reproduced from a main channel by processing a variable transmission rate and reverse playback by a user after reading and storing a signal of a specific subchannel in a memory. It is an object to provide an apparatus and method.

In order to achieve the above object, the present invention provides an encrypted data signal applied from the amplifying unit in an audio CD device comprising a mechanical unit, an amplifying unit, a servo unit, a DS unit, a DA, a driver unit, and a PC. And a servo unit for separating and outputting the operation state confirmation signal and the digital audio signal of the mechanism unit, respectively, and performing error correction and decryption processing on the encrypted digital audio signal applied from the servo unit under the control of the sipeuil. And a compression for variable rate and reverse playback, a compression / decompression unit for decompressing and outputting the compressed signal while compressing and outputting a digital signal applied by the control of the sipe oil, and controlling the sipe oil. Store the signal received from the compression / decompression unit in the designated area And a memory configured to output a signal stored in an area to the compression / decompression unit.

In still another aspect of the present invention, there is provided a first process for determining whether a signal is normally reproduced or sampled from a CD, and a second process for extracting a signal of a selected section from a selected channel when sampling in the process. And a third process of compressing the sampled signal in the process, storing the signal in a designated area of the memory, and returning the signal to the first process, and reproducing the signal of the selected channel in the first process. A fourth process proceeds to the next step if it is not determined whether to mix the normal reproduction signal and the sampling signal, and sets a section to mix the sampling signal if the process proceeds to the next step; A sixth process, a seventh process of executing a routine for processing the sample, and the normal reproduction signal and the sample signal processed in the seventh process to remix The eighth process and the ninth process if it is not mixed in the fifth process is determined whether or not to insert the sampling signal, and if not, the ninth process proceeds to the next step; A tenth step of setting a section into which the data is to be inserted; an eleventh step of executing a routine for processing the sample; and reproducing by inserting the sample signal processed in the eleventh step into the normal reproduction or mixed signal And a thirteenth process of determining whether or not the reproduction is completed, and if so, proceeds to the end step, and returns to the fourth process if it is not completed.

1 is a functional block diagram of an audio CD device according to an embodiment of the prior art;

2 is a functional block diagram of an audio CD mixing apparatus according to an embodiment of the present invention as an embodiment;

3 is a flowchart of a method of mixing audio CDs according to an embodiment of the present invention as an embodiment;

4 is a detailed flowchart of a sampling routine according to the present disclosure as an embodiment.

** Explanation of symbols on the main parts of the drawing **

10,110: mechanism 20,120: amplifier

30,130: Servo part 40,140: DS skin

50,150: DA 60,160: SI

70,170: driver 180: compression / decompression

190: memory

Hereinafter, as an embodiment, an apparatus and method for mixing audio CDs according to the present invention will be described.

FIG. 2 is a functional block diagram of an audio CD mixing apparatus according to an embodiment of the present invention, and FIG. 3 is a flowchart of a method of mixing audio CDs according to an embodiment of the present invention, and FIG. 4 is an embodiment. As a detailed flowchart of a sampling routine according to the present invention.

Referring to FIG. 2, the mixing apparatus of an audio CD according to the present invention includes a spindle motor for rotating the audio CD at a constant and uniform speed, and laser light from the audio CD. Mechanism unit 110 consisting of an optical pickup for reading the encrypted data signal selected by using and contained in the designated channel as the optical signal of the maximum level that can be read from the CD, and converts it into an electrical signal and outputs the converted signal. Receiving an electrical data signal output from the mechanism unit 110, reading the data as an optical signal using the laser, and an optical / electric conversion process for converting the optical signal into an electrical signal, and passes through the corresponding transmission line Amplifying the output of the signal by amplifying the signal with the proper level while compensating for the characteristic change that occurs. The unit 120, a servo unit for analyzing and outputting an encrypted data signal received from the amplifier unit 120, a digital data signal is received from the servo unit 130, and error correction and De-Skin which performs decoding and outputting, De-Sie 50 which converts the digital signal received from the De-Su skin into an analog signal and outputs it, and the above-mentioned CD device While monitoring and controlling the control unit while receiving and processing the operation unit 110 confirmation signal from the servo unit to determine whether the operation unit 110 is operating normally in a controlled state, and the operation unit 110 operates normally. If not, the CPU 160, which outputs a corresponding control signal, is controlled and monitored by the CPU 160, and receives a signal for controlling the normal operation of the mechanism unit 110. Thus, an audio CD comprising a driver unit 170 which converts a signal for controlling the spindle motor and the optical pickup of the mechanism unit 110 to operate normally, converts the signal to a constant level, and applies the signal to the instrument unit 110. In the apparatus,

By analyzing the coded data signal received from the amplifier 120 under the control of the CPU 160, the servo unit separates the operation state confirmation signal from the digital audio data signal and outputs the digital audio data signal. (Servo) unit 130,

Error correction (ErrorCorrection) of the digital audio signal received from the servo unit 130, encoding or decoding (encoded) of the encrypted signal, at the same time variable transmission (Pitch Variable) and reverse sampling (Reverse Sampling), A DSP unit 140 output by the control of the CPU 160,

Compresses the signal received from the DS skin 140 by the control signal of the CPU 160 and outputs the compressed signal, and decompresses and receives the compressed signal to the DS skin 140. Compression / decompression unit 180 for outputting,

The memory 190 is configured to store a signal received from the compression / decompression unit 180 by the control signal of the CPU 160 in a corresponding area and output the stored signal to the compression / decompression unit 180.

3 to 4, the mixing method of an audio CD according to the present invention is specified by a user's intention among digital signals encrypted in an audio CD and classified into a plurality of channels. A first step (S110) of determining whether to normally reproduce or sample the signal of the channel;

In the case of sampling the first step (S110), a second step (S120) of extracting a signal of a section selected from a channel selected by a user as a sample under the control of the CPU 160;

The first process (S110) after the digital signal sampled in the second process is compressed by the compression / decompression unit 180, stored in a designated area of the memory 190. A third process (S130) for allowing the sample to be repeatedly extracted by feeding back to (Feedback);

In the case of normal playback in the first step (S110), a fourth step (S140) of reproducing by reading a digital signal of a channel selected from the audio CD according to a user's intention;

The fifth step proceeds to the next step if it is not determined whether to mix the normal signal reproduced in the fourth process (S140) and the sampled signals by the second and third processes (S120, S130). Process (S150),

In the case of mixing by the user's intention in the fifth process (S150), a sixth process (S160) of setting a section in which the sampled signal is mixed with the normal reproduced signal;

A fourteenth step (S240) of selecting one sample from a plurality of samples extracted by the second to third processes (S120 and S130) and stored in the memory 190; A fifteenth step (S250) of proceeding to the next step if it is determined that the sample selected in the fourteenth step (S240) is to be reversely reproduced (Reverse Sampling); In the case of performing reverse playback in the fifteenth step S250, a sixteenth step S260 of performing reverse sampling in the DSP unit 140 under the control of the CPU 160; If the sample signal selected without the reverse playback in the fifteenth step (S250) or the reverse-reproduced signal in the sixteenth step (S260) is determined to determine whether the transmission rate is variable, a routine is performed. A seventeenth process S270 of returning to the started process; An eighteenth step (S280) of setting a range of a transmission rate to be changed when the transmission speed is variable in the seventeenth step (S270); A seventh process of executing a sample processing routine comprising a nineteenth process of returning to a process of starting a routine after processing a transmission speed to a value set in the eighteenth process (S280) (S170),

The normal reproduction signal and the sample signal processed in the seventh step S170 are mixed in the DSP unit 140 and the digital audio signal is converted into analog audio in the DAC 150. An eighth process (S180) for reproducing for broadcast output by converting into a signal;

In the case of not mixing in the fifth process (S150), it is determined whether to select and insert the signal extracted into the sample, and if not, the ninth process (S190) proceeding to the next step;

In the case of inserting the signal extracted into the sample in the ninth step (S190), a tenth step (S200) of setting a section in which the sampling signal is inserted into the normal reproduced or mixed signal;

An eleventh process S210 of executing the same function of the sample processing routine as that performed in the seventh process S170, and

The sample signal processed by the sample processing routine of the eleventh process S210 is inserted into the DSP 140 by the control of the CPU 160 to the normal reproduced or mixed signal, and the DSP 140 is processed. A 12th step (S220) of converting the digital audio signal processed by the DAC 150 into an analog audio signal, thereby reproducing the signal for broadcast output;

As described above, it is determined whether the reproducing output by mixing and inserting is completed, and when it is completed, the process proceeds to the end step, and when it is not completed, the process is fed back to the fourth process (S140). A thirteenth process S230 is included.

Hereinafter, an apparatus and method for mixing an audio CD configured according to an embodiment of the present disclosure as described above will be described in detail with reference to the accompanying drawings.

According to the intention of a user using an audio CD device according to the present invention, whether one channel is selected from a plurality of audio channels contained in the audio CD and played back normally, or for mixing and inserting a signal of a specific channel and a specific section, In order to use later, it is determined whether to extract a sample (S110). In the case of sampling in the first process, when the sampling section is selected while listening to a signal of a channel selected by the user, the CPU 160 By the control of the DSP unit 140, the sampled signal is applied to the compression / decompression unit 180, the compression / decompression unit 180 under the control of the CPU 160 is applied The received signal is compressed and applied to the memory 190, and the memory 190 is stored in an area designated by the control of the CPU 160, and the first process S110 is performed again. By feedback to (S130), the user can extract another sample.

In the first step (S110), if you want to play by selecting one channel without sampling from the audio CD, the servo unit receives the encrypted signal through the instrument unit 110, amplification unit 120 The controller 130 extracts a signal capable of confirming an operation state of the controller from the digital audio signal, extracts it from the digital audio signal, and then applies it to the CPU 160 under the control of the CPU 160.

The CPU 160 processes the applied signal to determine whether the mechanism unit 110 is operating normally and stably, and sends a signal to the driver unit 170 to control the mechanism unit 110 stably. Will print with

The driver unit 170 processes a signal for stably operating the mechanism unit 110 according to a control signal applied from the CPU 160 and converts the signal into an appropriate level signal to convert the spindle motor of the mechanism unit 110 and Each of the pickups is precisely controlled by a closed loop control method, and a digital audio signal having a stable and sufficient level from the audio CD is applied to the DSP unit 140.

The DSP unit 140 outputs an error-corrected and decrypted digital audio signal to the DAC 150 by the control of the CPU 160, thereby converting it into an analog signal by the DAC 150 for broadcast output. Is output.

While being output as described above, the user determines whether to mix the sampled signal (Six), and when mixing, sets a section to be mixed with the normal reproduced signal (S160), The sample processing routine is executed (S170).

The sample processing routine S170 selects one specimen from among the plurality of specimens processed in the specimen and stored in the memory 190 (S240), determines whether to reverse playback (S250), and performs reverse playback. After the reverse playback process (S260), it is determined whether the transmission rate is variable (Pitch Variable) (S270), if the transmission rate is variable after setting the above-mentioned variable range (Sange), the Pitch Variable processing is performed with the value of the set range of and returns.

The signal processed by the sample processing routine S170 as described above is reproduced and output for broadcast output by mixing the normal reproduced signal with the DSP unit 140 and applying it to the DAC 150.

In the mixed signal reproduced as described above, it is determined whether the user inserts the sampled signal (S190), and in case of insertion, the section for inserting the sample is set (S200), and the seventh time. A routine (Routine) of the same process as that of the routine processed in step S170, that is, reverse reproduction and transmission speed of the sample to be inserted is executed (S210).

The signal processed as described above is inserted into the DSP unit 140 under the control of the CPU 160, and is applied to the DAC 150 to be output for broadcast output.

Through the above process, it is determined whether the regeneration is completed without further mixing and insertion process, and when it is completed, the process proceeds to the end step, and when additionally mixing or inserting, the process returns to the fourth process (S140). (S230).

As described above, the apparatus and method for mixing audio CDs according to the present invention according to an embodiment of the present invention use a single CD device to sample signals of different channels or the same channel, and to simultaneously mix and repeat the necessary parts ( By mixing and inserting, a kind of techno music can be generated and output.

The technique of the present invention has the effect of sampling the signals of the same channel or different channels by using one CD driver device, and repeatedly inserting and mixing the signals of a channel to be broadcast.

In addition, there is an industrial and industrial use effect that can be easily applied not only to the audio signal but also to the mixing and insertion of the video signal using the video CD.

Claims (3)

In the audio CD device which consists of a mechanism part, an amplification part, a servo part, a DS skin, a die, a driver part, and a sipe oil, A servo unit for processing an encrypted data signal applied from the amplifying unit to separate and output an operation state confirmation signal and a digital audio signal of the mechanism unit, respectively; DPS which performs error correction and decryption processing of the encrypted digital audio signal applied from the servo unit under the control of the sipe oil, and performs variable transmission speed and reverse playback; A compression / decompression unit configured to decompress and output the digital signal applied under the control of the sipeu, and to decompress and output the compressed signal; And a memory configured to store a signal received from the compression / decompression unit in a designated area and to output a signal stored in the designated area to the compression / decompression unit under the control of the CP. Mixing device. A first process of determining whether to reproduce or sample a signal from the CD; In the case of sampling in the above process, a second process of sampling a signal of a selected section from a selected channel; A third process of compressing the sampled signal in the process and storing the signal in a designated area of the memory and then feeding back to the first process; In the case of normal reproduction in the first process, the fourth process of reproducing the signal of the selected channel; A fifth process of proceeding to the next step if it is not determined whether to mix the normal reproduction signal and the sampling signal; In the case of mixing in the process, a sixth process of setting a section for mixing the sampling signal; A seventh process of executing a routine for processing a sample; An eighth process of mixing and playing back the normal playback signal and the sample signal processed in the seventh process; In the case of not mixing in the fifth process, it is determined whether to insert the sampling signal. In the case of inserting in the process, the tenth process of setting the section to insert the sampling signal; An eleventh process of executing a routine for processing the sample; A twelfth process of inserting and reproducing the sample signal processed in the eleventh process into the normal reproduction or mixed signal; And a thirteenth step of returning to the fourth step if it is not completed, and proceeding to the end step if it is completed. The method of claim 2, The method of claim 7 or 11, wherein the fourteenth process of selecting one of the plurality of samples extracted; If it is not determined whether to play the selected sample in the reverse direction, the fifteenth step of proceeding to the next step; In the case of performing reverse playback in the above process, the sixteenth process of performing reverse playback processing; If it is determined whether the transmission speed is variable or not, the process returns to the process of starting the routine; In the case of varying the transmission rate in the above process, the eighteenth process of setting a range of the transmission rate to be changed; And a nineteenth step of varying the transmission speed to a value set in the step.