KR101696997B1 - Output Audio Size Automatic Adjustment Apparatus According to the Nosie using the DSP Codec Built - Google Patents

Abstract

The present invention relates to an apparatus for automatically adjusting an output sound size according to noise using a DSP built-in codec, and more particularly, to an apparatus for automatically adjusting an output sound size of a sound source device, An external noise magnitude calculation unit 120 for calculating a magnitude of external noises input through the external noise input unit and noise or noise of all surroundings except the sound input unit 110 and the sound source being output from the sound source device, A DSP (Digital Signal Processor) 100 having a sound amplitude amplifying unit 130 for amplifying sound to be output to the OUT terminal output unit according to the magnitude of the noise value calculated through the noise magnitude calculating unit; A sound source storage unit 200 for storing a digital audio (or sound source) signal output from the sound source apparatus; A line input unit 300 for receiving a digital audio signal stored in the sound source storage unit; An audio codec 400 having a coder 410 for compressing a digital audio signal input through the LINE input unit and a decoder 420 for decompressing the digital audio signal into an analog audio signal; The DSP extracts the analog audio signal from the audio codec, and adjusts the size of the sound source according to the result of signal processing calculated according to the external noise from the external noise size calculator of the DSP, or cuts off the sound, An OUT terminal output unit 500 that performs a function of automatically returning the output signal according to the output signal; The sound output display unit 600 displays the size of the sound source and the result of the sound blocking according to the result of the signal processing operation from the external noise size calculating unit of the DSP, It is possible to automatically cut off the sound when the size of the sound source being outputted is too large because the ambient sound size is too large.

Description

TECHNICAL FIELD [0001] The present invention relates to an automatic adjustment of output sound size according to noise using a DSP built-in codec,

The present invention relates to a device for automatically adjusting the output sound size of a sound source device, and more particularly, to a DSP capable of adjusting the volume magnitude in a short period of time according to ambient noise or noise using a high-speed computation function and a real- And an apparatus and method for automatically adjusting an output sound size according to a noise using a codec.

Generally, DSP is an abbreviation of digital signal processor used in electronic circuit design, and refers to an integrated circuit capable of processing digital signals in hardware. However, in the AV (Audio Video) system, it means a digital sound field processing process (Digita Sound Field Processing), and in the AV receiver, it is also used as an abbreviation of a DSP surround program.

Developed by Yamaha engineers in Japan in 1986, DSP is a technology that collects acoustic samples from famous European churches, jazz bars, concert halls, etc., and designs integrated circuits through analysis to reproduce the sounds there. Yamaha engineers have developed a technology called "Single Point Quad Miking" to accurately measure the sound field at multiple locations, collecting data from performance venues around the world and storing it on a computer chip.

DSP products are divided into three categories by signal dimension. The one-dimensional signal typically refers to a voice signal, an audio signal, and a communication signal received by the antenna. The two-dimensional signal refers to a still image such as a photograph, and the three-dimensional signal refers to a moving image signal. The reason we need these DSPs is simply that we use everyday words, for example, the closer the sound is, the closer it sounds, but the farther away the sound is, the less it sounds or becomes less audible. This phenomenon is due to noise in the air. DSPs are needed to ignore these noises and send signals. It is also the most basic, but the DSP is also used to convert the analog signals we use to digital signals used by the computer.

In other words, DSP refers to performing algebraic operation on digital data obtained by A / D conversion of an analog signal to perform signal processing such as filtering and spectrum analysis. It basically aims at real-time digital processing of analog signals. DSP is a mathematical operation semiconductor that can digitally compute digital signals quickly. Microprocessor performs these functions, but is slower than DSP, which specializes only in mathematical operations. The DSP is a dedicated processor that is designed to dramatically improve the hardware architecture of a general-purpose microprocessor, and to achieve high-speed operation and compactness. The DSP has the advantage of upgrading the system by replacing only the software. In addition, you can watch movies on your PC, enjoy your favorite accompaniments, use a high-speed modem and ISDN to make TV conferences, and apply high-speed 3D graphics and virtual reality to games. DSP is widely used in personal computers, radar, oil field exploration, space exploration and medical fields because it employs circuits that can process high speed digital signals, such as addition, multiplication and so on.

Such a DSP is gradually used for a wide range of applications, and is recently used for voice coding for digitizing an analog signal and is being used for digital mobile communication, answering machine, video phone and multimedia. In the field of sound signal processing, it is also used for electronic sound generation devices and electronic entertainment for the blind or ordinary people, and is also used for three-dimensional image processing and animation. It can control small mechanical devices such as HDD, and is used as a digital filter for pure communication. When it is used in a computer, it is used as an auxiliary processor separate from the main CPU, thereby reducing the burden on the CPU when performing sound or image processing. The DSP provides a powerful anti-collision system that reduces the risk of car accidents by demonstrating powerful functions for real-time calculation of voice, data and video signals, a dryer that tells you how to dry the laundry, and an automatic washer It seems to be installed in the product. In addition, DSP is expected to be used for a robot arm that feels sensation, an ear-type hearing aid with advanced functions, and so research and development on this field is actively under way.

For example, according to the automatic volume control device and the automatic volume control method disclosed in Korean Patent Laid-Open Publication No. 10-2007-0028622 (Mar. 13, 2007) proposed in Patent 1, An information searching unit for searching for a noise corresponding to the input noise from the database unit, and a controller for comparing the input noise with the searched noise, A sound volume level determining unit for determining a sound volume output level, and a speaker for outputting sound according to the determined sound volume output level, the sound can be output in consideration of ambient noise (see FIG. 1 ).

According to the automatic volume control device for a bell sound volume and its control method according to the ambient noise detection of Korean Patent Publication No. 2000-0030353 (Jun. 2000) proposed in Patent 2, if the output of the ring tone is automatically controlled After setting the output range of the ringing intensity of the mode according to the intensity of the sound and the range of the reference value, the mode according to the intensity of the sound is selected, and the ambient noise is detected to measure the duration and intensity of the noise. If the detected noise is smaller than the reference value range, the ring tone is set to the lower limit value in the mode according to the sound intensity. If the detected noise is within the reference value range, the ring tone is set to the reference value range in the mode according to the sound intensity, If it is larger than the reference value range, the ring tone is set to the upper limit value in the mode according to the sound intensity so that the ring tone is outputted at the set sound intensity Write, is a bell of the mobile phone sound volume level of the mobile phone automatically adjusted according to the noise level of ambient sound according to the called party when it is possible to reduce the noise level of the damage (see I in Fig. 1).

However, the above-mentioned Patent 1 can automatically adjust the volume, but there is no method for setting the volume to be increased to some extent and a case where the level of noise increases to a level exceeding the limit and the output level becomes very high.

In addition, patent 2 applies only to the mobile phone terminal, and it is possible to set the output range of the ringing intensity of the mode depending on the sound intensity, the mode selection according to the sound intensity, And the noise is compared with the reference value to determine the ring tone as the lower limit value, the reference value mode, and the upper limit value, and then the complex algorithm is applied. The application of such a complicated algorithm is inevitably limited due to the specificity considering communication of the mobile phone. In particular, in the case of noise reaching the output volume limit, it is not possible to block the volume or limit the volume, There is no means or method that is available.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a digital signal processor So as to provide a user-friendly function of automatically adjusting the volume and blocking the volume when the output volume is at a limit or limiting the volume of the output, thereby providing an automatic adjustment of the output sound size according to the noise using the DSP built-in codec .

According to another aspect of the present invention, there is provided an apparatus for automatically adjusting an output sound size of a sound source, the apparatus comprising: an external noise input unit for inputting external noise to the sound source device via a MIC IN terminal; And an external noise size calculation unit 120 for calculating a size of external noise inputted through the external noise input unit except for the sound source output from the sound source device and the external noise size calculation unit A DSP (Digital Signal Processor) 100 having a sound magnitude amplifying unit 130 for amplifying sound to be output to the OUT terminal output unit according to the calculated magnitude of the noise value; A sound source storage unit 200 for storing a digital audio (or sound source) signal output from the sound source apparatus; A line input unit 300 for receiving a digital audio signal stored in the sound source storage unit; An audio codec 400 having a coder 410 for compressing a digital audio signal input through the LINE input unit and a decoder 420 for decompressing the digital audio signal into an analog audio signal; The DSP extracts the analog audio signal from the audio codec, and adjusts the size of the sound source according to the result of signal processing calculated according to the external noise from the external noise size calculator of the DSP, or cuts off the sound, An OUT terminal output unit 500 that performs a function of automatically returning the output signal according to the output signal; And a sound output display part (600) for displaying the sound source size and sound blocking result according to a result of the signal processing calculation from the external noise size calculation part of the DSP by a character or code. And an automatic output sound size adjusting device according to the present invention.

The apparatus for automatically adjusting the output sound size according to noise using the DSP built-in codec of the present invention has the following effects.

(1) When the volume control device is used, it is possible to provide the user convenience that is automatically controlled without requiring any manual control by the user.

(2) It automatically increases the volume control speed according to external noise, and can cut off the volume or limit the volume increase when the output volume limit is reached.

(3) By displaying the sound source size and sound blocking result with characters or symbols, the user can confirm that the sound source device is not broken due to external noise or noise.

1 (a) and 1 (b) are a block diagram and a flowchart of a volume control apparatus and method for a conventional technique,
2 is a block diagram schematically illustrating a general DSP chip structure for an automatic output sound size adjusting apparatus according to noise using a DSP built-in codec according to a preferred embodiment of the present invention,
3 is a block diagram illustrating an overall technical configuration of an apparatus for automatically adjusting an output sound size according to noise using a DSP built-in codec according to a preferred embodiment of the present invention,
4 is a block diagram illustrating an audio codec for an automatic output sound size adjusting apparatus according to a noise using a DSP built-in codec according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. Although the same reference numerals are used in the different drawings, the same reference numerals are used throughout the drawings. The prior art should be interpreted by itself. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 to 4, a technical configuration of an automatic output sound size adjusting apparatus according to noise using a DSP built-in codec according to an embodiment of the present invention includes a DSP (Digital Signal Processor) 100, a sound source storage unit A LINE input unit 300, an audio codec 400, an OUT terminal output unit 500, and an audio output display unit 600.

First, a DSP (Digital Signal Processor) structure according to an embodiment of the present invention will be described with reference to FIG.

The DSP structure is designed so that, when a signal is input, a process of performing a signal processing operation on the input signal and the data stored in the internal memory within a predetermined time and outputting the operation result is continuously repeated . The components of the DSP include an input / output unit 101, an operation unit 102, a data memory 103, an address operation unit 104, a control unit 105, and a program memory 106, have. Input / output circuits include serial input / output and parallel input / output. The arithmetic unit includes multiplication elements, arithmetic and logical units (ALU), and shifts. ROM and RAM are used as a data memory and a program memory, and a sequencer and the like as a control circuit are used as basic components.

DSP is a kind of A-D, D-A signal converter that converts analog (A) signal into digital (D) signal and conversely converts D signal into A signal. However, because DSP chips are essentially microprocessor (MPU) chips, these signals are processed and processed by the computer for ease of use by fast calculation (or computation) by a unique algorithm (or logic structure).

These DSPs are suitable for streaming media codecs with low power consumption and low cost. Software-programmable DSPs are the best A / V system solution for implementing various existing and future codec standards.

In other words, DSP is designed to process mainly digital signals, whereas most of life, including human voice, is an analog signal, so it is seen as a medium mediation technique in which human and computer can easily communicate with each other have. DSP technology is a state of the art sound processing technology that can pick and synthesize only the desired sound through digital recording and reproduction process like a "magician of sound" in a word.

If you use advanced sound equipment that uses DSP technology, you can listen to the realistic foreign language by using the method of filtering only the voice of the main character. On the other hand, when you use this equipment to relay the crime scene with the helicopter, You can filter out the noise and only relay the voice of a clean field reporter. In addition, various advanced functions for cassette tapes, such as those found in car audios and the like, can be said to be cases in which DSP chip technology is applied although it is a rudimentary form. For example, there is a BS (blank space) switch that jumps over unoccupied empty space and plays a tape, or an RPT (RePeaT) switch that allows only the specified song to be repeated.

However, the core of DSP technology is 'Algorithm' which means 'a method of calculating how to perform the desired operation most effectively'

Therefore, in the preferred embodiment of the present invention, the algorithm is modified as shown in FIG. 3 so as to be suitable for an automatic adjustment of the output sound size according to the noise using the DSP built-in codec.

Referring to FIG. 3, the DSP (Digital Signal Processor) 100 detects a sound actually recognized by the human ear due to sound or noise that is interfered with in the process of outputting sound (or sound) A digital signal processing means designed in consideration of the inconvenience and troublesomeness of the user making a sudden decrease in the sound volume by button operation or the like and the external noise inputting means for inputting external noise to the sound source device through the MIC IN terminal An external noise size calculation unit 120 for calculating a size of external noise input through the external noise input unit 110 and an OUT terminal output unit 500 according to a noise value calculated through the external noise size calculation unit, And a sound amplitude amplifying unit 130 for amplifying the sound intensity to be output.

The external noise input unit 110 is a type of sound recognition sensor unit mounted on the DSP, and detects external noise or noise during the process of outputting sound (or sound) from the sound source.

The external noise size calculator 120 receives the size of the externally interfering sound or noise detected from the external noise input unit 110 and determines a preset parameter (for example, a sound size that the user actually wants to listen to And a reference value of how much the ambient noise size should activate the automatic adjustment function), the signal processing operation is performed within a predetermined time by the operation unit 102 having the multiplier element or the arithmetic and logical unit (ALU) And the operation of outputting the operation result is repeatedly performed.

The sound magnitude amplification unit 130 amplifies the magnitude of sound to be output to the OUT terminal output unit 500 according to the result of signal processing computed by the external noise magnitude calculation unit 120.

In addition, the DSP (Digital Signal Processor) 100 according to the embodiment of the present invention can reduce the noise level that the user actually hears due to noise or noise that is interfered in the process of outputting the sound of the sound source device, Can be set in advance to determine how much the size of the output sound size should be activated to activate the function of automatically adjusting the output sound size.

In addition, the output sound automatic adjustment function may include a function of outputting sound or noise of all surroundings except for the sound source being output by mounting the external noise input unit 110 having the MIC IN terminal mounted on the DSP to the external noise size calculation unit 120 ).

Then, it is judged whether or not to execute the automatic control of the output sound by comparing with the minimum noise level of the parameter set by the user. In this case, when the sound volume of the surroundings is too large and the size of the sound source to be outputted becomes too large, it is automatically cut off.

In the embodiment of the present invention, when the size of the sound source is excessively large so that the size of the sound source is too large to be automatically blocked, unnecessary power consumption in the situation where the sound of the sound source device can not be heard due to ambient noise or noise And to provide convenience in which the user does not need to use the stop button. Also, in the embodiment of the present invention, it is possible to perform a function of automatically returning according to the degree of noise after blocking.

3, the sound source storage unit 200 is a means for storing a digital audio (or sound source) signal output from the sound source apparatus, and the sound source storage unit 200 may be a desktop, a notebook, And can be stored in the data memory (RAM) 103 of the DSP of FIG. 2 described above.

Referring to FIG. 3, the LINE input unit 300 receives digital audio (or sound source) signals stored in the sound source storage unit 200. The LINE input unit 300 is for transmitting the sound source stored in the sound source storage unit 200 to the audio codec 400. When the sound source is stored in the data memory (RAM) 103 of the DSP of FIG. 2, The audio codec 400 can be directly transmitted to the audio codec 400. [

3 and 4, the audio codec 400 includes a coder 410 for converting (or compressing) a digital audio signal input through the LINE input unit 300, a compressed digital And a decoder (Decoder) 420 for decompressing the audio signal into an analog audio signal.

In other words, the contents of the sound (or sound) file are compressed and stored in numbers, and then the sound is played back through the player in real time.

3, the OUT terminal output unit 500 is a means for outputting an analog audio signal decompressed from the audio codec. The OUT terminal output unit 500 is connected to the external noise size calculation unit 120 of the DSP 100, According to the result of the signal processing operation, the output of the sound source is adjusted according to the result of the operation, or the sound output is cut off when the sound needs to be increased due to the noise. In order to block the acoustic output, a semiconductor switching element is built in the OUT terminal output unit 500.

3, the sound output display unit 600 displays a sound source size and sound blocking result according to a result of signal processing computed from the external noise size calculator 120 of the DSP 100, .

As described above, displaying the sound source size and sound blocking result according to the embodiment of the present invention by letters or symbols has a feature that the user can confirm that the sound source device is not broken due to external noise or noise.

Hereinafter, the operation and effect of the apparatus for automatically adjusting the output sound size according to the noise using the DSP built-in codec according to the preferred embodiment of the present invention will be described in detail.

First, in a preferred embodiment of the present invention, an external noise input unit 110 for detecting external noise to a sound source device, an external noise size calculation unit 120 for calculating a size of external noise, A DSP 100 having a sound magnitude amplifying unit 130 for amplifying sound to be output according to the sound magnitude; A sound source storage unit 200 for storing a digital audio (or sound source) signal output from the sound source apparatus; A line input unit 300 for receiving a digital audio signal stored in the sound source storage unit; An audio codec 400 having a coder 410 for compressing a digital audio signal input through the LINE input unit and a decoder 420 for decompressing the digital audio signal into an analog audio signal; An OUT terminal output unit 500 for adjusting the size of a sound source or blocking sound according to a result obtained by performing signal processing on the analog audio signal decompressed from the audio codec from the external noise size calculation unit of the DSP; A sound output display unit 600 configured to display the size and sound blocking result of the sound source calculated by the external noise size calculation unit of the DSP by letters or symbols can be compared with the minimum noise level set by the user, Control function is executed. However, there is a unique characteristic that when the size of the surrounding sound is too large and the size of the sound source to be outputted becomes too large, it can be automatically blocked.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Digital Signal Processor (DSP)
110: External noise input section
120: external noise size calculation unit 130: sound size amplification unit
200: Sound source storage unit
300: LINE input
400: Audio Codec
500: OUT terminal Output section
600: Sound output display

Claims (2)

1. An apparatus for automatically adjusting an output sound size of a sound source apparatus,
An external noise input unit 110 for inputting external noise to the sound source device through a MIC IN terminal and external noises inputted through the external noise input unit, And a sound magnitude amplification unit 130 for amplifying the sound to be output to the OUT terminal output unit according to the magnitude of the noise value calculated through the external noise magnitude calculation unit A DSP (Digital Signal Processor) 100;
A sound source storage unit 200 for storing a digital audio (or sound source) signal output from the sound source apparatus;
A line input unit 300 for receiving a digital audio signal stored in the sound source storage unit;
An audio codec 400 having a coder 410 for compressing a digital audio signal input through the LINE input unit and a decoder 420 for decompressing the digital audio signal into an analog audio signal;
The DSP extracts the analog audio signal from the audio codec, and adjusts the size of the sound source according to the result of signal processing calculated according to the external noise from the external noise size calculator of the DSP, or cuts off the sound, An OUT terminal output unit 500 that performs a function of automatically returning the output signal according to the output signal;
And a sound output display part (600) for displaying the sound source size and sound blocking result according to a result of the signal processing calculation from the external noise size calculation part of the DSP by a character or code. Output sound size automatic adjustment device according to. delete

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