KR0136514Y1 - Sound reflection auto reproduction apparatus - Google Patents

Abstract

The present invention relates to an automatic sound field reproducing apparatus, and includes an accompaniment signal output from the accompaniment signal generator, an analog / digital converter for converting the microphone signal output through the microphone signal processor into a digital form, and an analog / digital converter. A level counter for counting the level size of the digital accompaniment signal and the microphone signal, a level comparator for comparing the level magnitude of the accompaniment signal and the level g key of the microphone signal, and controlling the difference between the values compared through the level comparator A balance adjustment unit for adjusting the balance of the signal and applying it to the accompaniment / microphone signal synthesizing unit, a sound field code reading unit for reading the unique sound field code of the accompaniment signal selected by the user and applying it to the sound field processing unit, and an accompaniment / microphone signal synthesizing unit Sound field processing unit for processing the accompaniment / microphone signal coupled through the sound field, and sound field processing through the sound field processing unit A digital / analog converting unit converts the converted signal into an analog form and outputs it to a speaker, and automatically adjusts the level of the accompaniment signal generated by the video accompaniment device and the microphone signal input through the microphone, and then performs the sound field processing. By outputting, it gave the user more live accompaniment and microphone sound. This design is used for all video accompaniment devices, and especially useful for home use.

Description

Automatic sound field player

1 is a schematic block diagram showing a conventional image accommodating device.

2 is a schematic block diagram of an automatic sound field reproducing apparatus according to the present invention.

3 is a waveform diagram showing that the levels of the accompaniment signal and the microphone signal are counted by the level counter shown in FIG.

FIG. 4 is a detailed block diagram of the sound field processor shown in FIG.

* Explanation of symbols for main parts of the drawings

90: accompaniment signal generator 100: microphone signal processor

110: accompaniment / microphone signal synthesis unit 130, 160: analog / digital conversion unit

140, 170: level counter 150: level comparison unit

180: balance adjustment unit 190: sound field processing unit

200: sound field code reader 210: merge

220, 230: digital / analog converter 1910: low pass filter

1920: Early reflection sound generator 1930 ~ 1933: 1st ~ 4th synthesizer

1940: Retarder 1950 ~ 1953: First to fourth combination filter

1960, 1970: first and second all pass filters

The present invention relates to an automatic sound field reproducing apparatus. More specifically, when an accompaniment signal output from an image accompaniment apparatus and an audio signal input to a microphone are simultaneously applied, the level balance of the two signals is automatically adjusted. The present invention relates to an automatic sound field reproducing apparatus for automatically providing a sound field effect suitable for accompaniment through a sound field processing unit.

In general, when a sound is heard in a theater or a concert hall, a sound generated by a characteristic unique to the place, that is, a halftone sound, is called a sound field. In addition, the sound field is classified into a direct wave arriving directly to the listener from a sound source on the stage, and a reflected wave arriving later in time as the distance reflected from the wall or ceiling and the floor is greater than the direct wave.

A more detailed breakdown of the reflected waves is a series of random reflections from all directions, with the first reflected waves (called hyper-based, early reflections, or first-order reflections) reflected through the left and right side walls, followed by a few more reflections. There is a reflected wave (called high-order reflection, subsquent reflection, or reverberation).

On the other hand, the video accompaniment device that is currently rapidly developed and marketed is a device that displays lyrics along with song accompaniment by connecting to a TV monitor, and includes an LD (ac) video accompaniment device using a laser disc player and a compact disc graphic player. It is divided into CDG image accompaniment device and computer image accompaniment device using memory.

Each of the image accompaniment apparatus displays the image information, accompaniment information and lyrics information on the monitor by using the LCD or CDG and memory in which the image and accompaniment information are recorded, and sings using a microphone used.

That is, as shown in FIG. 1, when the user directly selects each function key attached to the image accommodating device, the control signal corresponding to the function key is transmitted to the microcomputer 20 through the command input unit 10. FIG. ) Is entered. In addition, when the user selects each function by using a remote controller (not shown), the remote controller signal is inputted to the preamplifier 30 to be signaled and then input to the microcomputer 20.

The microcomputer 20 reads a function corresponding to each input signal and applies the control signal to the controller 40. The control unit 40 controls the generation of the image and text signals and the accompaniment signal according to the control signal applied from the microcomputer 20.

The image signal generator 50 generates an image signal according to the control signal of the controller 40. At this time, the generated signal is changed according to the type of the image accommodating device. That is, in the case of an image accommodating device using an LD, an image signal recorded in the LD is output. In the case of an image accommodating device using a CDG, a graphic signal recorded in the CDG is output. The still picture signal recorded in the device is output.

In addition, the text signal generation unit 60 outputs information on the current music, such as lyrics information, volume, channel, song title, and song number, to the video / text signal synthesis unit 70.

The video / text signal combiner 70 combines the video signal output from the video signal generator 50 and the text signal output from the text signal generator 60 and outputs the same to the monitor 80.

The monitor 80 displays the image / text signal combined by the image / text signal synthesizer 70, so that the user can enjoy various information about the song and the background screen.

On the other hand, the accompaniment signal generator 90 outputs the accompaniment signal of the music selected by the user. In addition, the microphone signal processing unit 100 receives a user's voice signal input from an external microphone, processes the signal, and outputs the signal to the accompaniment / microphone signal synthesizing unit 110.

The accompaniment / microphone signal combiner 110 synthesizes the accompaniment signal output from the accompaniment signal generator 90 and the microphone signal output from the microphone signal processor 100 and outputs the synthesized microphone signal to the speaker 120.

The speaker 120 converts the synthesized signal (accompaniment signal + microphone signal) applied from the accompaniment / microphone signal synthesizing unit 110 into a voice signal so that the user can directly hear the synthesized signal.

In the image accompaniment apparatus having such a configuration, since the accompaniment signal generator 90 outputs the accompaniment signal stored therein but there is no equalizing function, only the sound volume is adjusted and output according to the volume amount adjusted by the user. .

In addition, since the microphone signal processor 100 processes only the audio signal input from the external microphone, only the volume of the sound is adjusted and output according to the volume amount adjusted by the user, similarly to the accompaniment signal generator 90.

Therefore, in an unbalanced state in which the accompaniment signal and the microphone signal are not properly adjusted, one of the accompaniment signal or the microphone signal is emphasized and output, and the accompaniment and audio signals output through the speaker are not harmonized. There was a problem that occurs.

In addition, in the above case, since the equalization state is fixed and always performs accompaniment and songs only with a constant sound field effect, there is a problem in that the user feels bored when listening to the same song repeatedly.

The present invention is to solve the above problems, the object of the present invention is to automatically adjust the level balance of the audio signal input through the accompaniment signal and the microphone output signal processing unit and the signal processing through the microphone signal processing unit By accommodating the accompaniment signal and the audio signal in harmony, and automatically processing sound field effects suitable for the accompaniment signal output from the accompaniment signal generator, to provide various sound field effects to provide more interesting to the user. An automatic sound field reproducing apparatus is provided.

Features of the automatic sound field reproducing apparatus according to the present invention for achieving the object as described above, the accompaniment signal generating unit for generating an accompaniment signal, a microphone signal processing unit for processing a microphone signal input from the microphone, the accompaniment signal generator The accompaniment / microphone signal synthesizing unit which combines the generated accompaniment signal and the microphone signal processed through the microphone signal processing unit, and the speaker that converts the left and light signals combined through the accompaniment / microphone signal synthesizing unit into audio signals and outputs the audio signal. An automatic sound field reproducing apparatus provided; An analog / digital converter for converting the accompaniment signal output from the accompaniment signal generator and the microphone signal output through the microphone signal processor into a digital form; A level counter for counting level levels of the digital accompaniment signal and the microphone signal converted through the analog / digital converter; A level comparison unit for comparing the level size of the accompaniment signal with the level size of the microphone signal; A balance adjustment unit for adjusting the balance of the two signals by adjusting the difference of the values compared through the level comparison unit and applying the balance to the accompaniment / microphone synthesis unit; A sound field code reading unit for reading the unique sound field code of the accompaniment signal selected by the user and applying it to the sound field processing unit; A sound field processor for sound field processing the accompaniment / microphone signal coupled through the accompaniment / microphone signal synthesis unit; A digital / analog converting unit converts a signal processed by the sound field through the sound field processing unit into an analog form and outputs the signal to a speaker.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of an automatic sound field reproduction apparatus according to the present invention will be described in detail.

FIG. 2 is a schematic block diagram showing an automatic sound field reproducing apparatus according to the present invention. The same components as those in FIG. 1 use the same reference numerals.

The accompaniment signal of the analog form output from the accompaniment signal generator 90 is applied to the analog / digital (abbreviated as A / D) conversion unit 130 and converted into a digital accompaniment signal. It is output to the level counter 140.

The level counter 140 divides the digital accompaniment signal into N frames, counts the magnitude of the signal level of each frame, and outputs the value to the level comparator 150. At this time, the level of the accompaniment signal is counted by the level counter 140 as shown in FIG.

Meanwhile, the analog microphone signal output from the microphone signal processor 100 is input to the A / D converter 160, converted into a digital microphone signal, and then output to the level counter 170.

As described above, the level counter 170 divides the digital microphone signal into N frames, counts the signal level of each frame, and outputs the value to the level comparison unit 150. At this time, the level of the microphone signal is counted by the level counter 170 as shown in FIG.

The level comparator 150 detects the difference between the two signal levels by comparing the magnitudes of the signal levels per frame applied from the two level counters 140 and 170, and then applies the result to the balance adjusting unit 180. do.

The balance adjusting unit 180 properly adjusts the level difference between the two signals according to the result applied by the level comparator 150 so that the levels of the two signals are the same, and outputs them to the accompaniment / microphone signal combining unit 110.

The accompaniment / microphone signal synthesizing unit 110 combines the accompaniment signal and the microphone signal of which the balance of the level is adjusted by the balance adjusting unit 180, and then outputs them to the sound field processing unit 190. At this time, the signal output from the accompaniment / microphone signal combination unit 110 is a left (hereinafter, abbreviated as L) signal and a light (hereinafter, abbreviated as R) signal.

On the other hand, the control signal output from the control unit 40 is applied to the accompaniment signal generating unit 90 to control the output of the accompaniment signal, and is also applied to the sound field code reading unit 200.

The sound field code reading unit 200 stores the unique sound field codes of all the accompaniment signals output from the accompaniment signal generator 90, and corresponds to the songs selected by the user according to the control signal applied from the control unit 40. The sound field code is output to the sound field processor 190. Therefore, the L and R signals applied from the accompaniment / microphone signal synthesizing unit 110 are subjected to sound field processing according to the sound field codes output from the sound field code reading unit 200, so that sound field processing suitable for each song can be performed.

The sound field processing unit 190 uses a left (L) and a light (R) signal applied from the accompaniment / microphone signal synthesizing unit 110 and a sound field code applied by the sound field code reading unit 200 to suit the sound field code. After the operation, the front left (hereinafter abbreviated as FL) signal, the front light (hereinafter abbreviated as FR) signal and the real left (hereinafter abbreviated as RL) signal and the real light (hereinafter abbreviated as RR) Output the signal.

Meanwhile, the L / R signal output from the accompaniment / microphone signal synthesizing unit 110 and the FL / FR signal output from the sound field processing unit 190 are combined through merge (Merge) 210, and then digital / analog (Digital / Analog) is applied to the conversion unit 220. In this case, a signal applied to the D / A converter 220 is a signal in which L and FL are combined (L + FL) and a signal in which R and FR are combined (R + FR). In addition, the RL / RR signal output from the sound field processor 190 is applied to the D / A converter 230.

The two D / A converters 220 and 230 convert each input digital signal into an analog voice signal and then convert the main signal into a digital signal, that is, a (L + FL) signal and a (R + FR). ) Outputs the signal to the main speaker 120, and outputs the surround signal RL signal and RR signal to the surround speaker.

Meanwhile, the sound field processor 190 described above will be described in more detail with reference to FIG. 4.

The low pass filter 1910 removes low frequency components of the L signal and the R signal applied from the accompaniment / microphone signal synthesizing unit 110 according to the sound field code applied from the sound field code reading unit 200. That is, the low frequency component is removed and then output to the initial reflection sound generator 1920 to convert the L / R signal to the same frequency of the sound reflected through the wall.

The initial reflection sound generator 1920 generates an initial reflection sound such as reflected through the wall using the L / R signal applied from the low pass filter 1910, and then generates the first to fourth synthesizers 1930. ~ 1933).

Meanwhile, the delay unit 1940 delays the L / R signal applied by the accompaniment / microphone signal synthesizing unit 110 by the reverberation delay time of the reflected wave according to the sound field code applied from the sound field code reading unit 200. Outputs the first to fourth combination filters 1950 to 1953.

The first to fourth combination filters 1950 to 1953 are connected in series to the first and second all pass filters 1960 and 1970. The first to fourth combination filters 1950 to 1953 and the first and fourth combination filters 1950 to 1953 are connected in series. The two all-pass filters 1960 and 1970 generate reverberation sound using the L / R signal. Here, the frequency output from the first to fourth combination filters 1950 to 1953 is not smooth, so the frequency characteristics are smoothed using the first and second all pass filters 1960 and 1970 so that the frequency characteristics are smooth. If you don't, you can eliminate the loss and create a more detailed pattern in the time domain to create a lively sound field.

The L / R signals output from the first and second all-pass filters 1960 and 1970 are applied to the respective synthesizers 1930 to 1933, and the first to fourth synthesizers 1930 to 1933 are the first and second. The L / R signals output from the all-pass filters 1960 and 1970 and the L / R signals output from the early reflection generator 1920 are combined to generate FL signals, FR signals, RL signals, and RR signals.

The generated FL signal and FR signal are applied to the merge 210 shown in FIG. 2, and the RL signal and the RR signal are applied to the D / A converter 230.

As described above, according to the automatic sound field reproducing apparatus according to the present invention, since the level of the accompaniment signal and the microphone signal are automatically adjusted, the user can enjoy the image accompaniment function in a state where the accompaniment signal and the microphone signal are in harmony, By reading the sound field codes of the songs and performing sound field processing suitable for the sound field codes, the accompaniment signals are output, so that the user can listen to the accompaniment signals with sound field feeling as if they are being played in a concert hall.

Claims (1)

Accompaniment that combines the accompaniment signal generator for generating accompaniment signal, the microphone signal processor for processing the microphone signal input from the microphone, the accompaniment signal generated from the accompaniment signal generator and the microphone signal processed through the microphone signal processor An automatic sound field reproducing apparatus comprising a microphone signal synthesizing unit and a speaker for converting a left signal and a light signal combined through an accompaniment / microphone signal synthesizing unit into a voice signal; An analog / digital converter for converting the accompaniment signal output from the accompaniment signal generator and the microphone signal output through the microphone signal processor into a digital form; A level counter for counting the level sizes of the digital accompaniment signal and the microphone signal through the analog / digital converter; A level comparison unit for comparing the level size of the accompaniment signal with the level size of the microphone signal; A balance adjustment unit for adjusting the balance of the two signals by adjusting the difference of the values compared through the level comparison unit and applying the balance to the accompaniment / microphone synthesis unit; A sound field code reading unit for reading the unique sound field code of the accompaniment signal selected by the user and applying it to the sound field processing unit; A sound field processor for sound field processing the accompaniment / microphone signal coupled through the accompaniment / microphone signal synthesis unit; And a digital / analog converter for converting a signal processed by the sound field through the sound field processor into an analog form and outputting the signal to a speaker.