KR100550577B1 - Voice adaptive image correction method and device - Google Patents

Abstract

The present invention relates to an image correction method in a device capable of separating and reproducing an image signal and an audio signal from a provided source, and in particular, a first process of detecting a sound level for each frequency band divided into a predetermined region in the audio signal. And a second process of detecting a level of color and luminance that implements an image from the image signal, and comparing a sound level for each frequency band obtained through the first process with reference levels to obtain data about a correction range of the image. Display of the image signal by a third process of generating, a fourth process of calculating a correction value of the level detected in the second process on the basis of the data generated in the third process, and a correction value calculated in the fourth process And a fifth process of adjusting the state, and an apparatus according to the same. If it is provided, if the volume change is sudden or only a certain frequency such as monologue and solo is detected, it adjusts the video signal to change the screen change with the beat and volume or increase the screen concentration by increasing the sharpness in monologue and solo. Stereoscopic imaging.

Description

Voice adaptive image correction method and device

The present invention relates to image correction, and more particularly, to a video adaptive video correction method and apparatus for improving the realism of an image by correcting and changing a video signal based on a dynamic sound effect when watching a music video. It is about.

In recent years, with the advancement of industry and the specialization and fragmentation of work, modern people tend to be a part of the industrial structure in which production and consumption occur together as an individual rather than as a member of a specific organization. And diversification of personality is on the rise. According to this trend, modern people have a lot of interest in the use of their spare time and spare no interest and effort in improving and living quality of life.

Therefore, a television broadcast receiver or a video cassette recorder, which is conventionally simply used to receive a broadcast program or play a recorded program, does not satisfy the needs of consumers, and consumers want to be provided with clearer and clearer picture quality.

The technology that has been proposed until recently to satisfy the consumer's needs is representative of SONY's' OPC (Optimum Picture Compensation) ',' HITACHI ''s' recording current automatic negating device' and LG's' With reference to Figure 1 attached to the contents of OPR 'briefly as follows.

FIG. 1 is a diagram for explaining an OPR operation, in which a signal accessed through a video head HD that accesses video data recorded in a magnetized state on a video tape is amplified by an amplifier AMP. In addition, a signal according to the envelope of the reproduced signal detected through the envelope detector 10 which receives a signal not passed through the amplifier AMP, that is, an RF output signal initially output during reproduction, and detects an envelope of the signal is received. The smoothing circuit 20 smoothes the signal according to the envelope of the detected playback signal.

In this case, the signal Venv according to the envelope converted into the DC voltage through the smoothing circuit 20 is input to the non-inverting data input terminal of the comparator OP, and the comparator OP is input to the inverting data input terminal. Compared to (Vref), when the state voltage compared with each reference voltage, that is, the reference voltage is larger than the reference voltage, a high state signal is output.

The comparison state signal output from the comparator OP compares the signal Venv input to the non-inverting data input terminal with a reference value divided into a first reference voltage and a second reference voltage representing a threshold range. In the case of maintaining a very poor state, the magnitude of the DC voltage is low, in which case it is compared with the first reference voltage, and in a good state it is compared with the second reference voltage.

The CPU 30 receiving the output signal of the comparator OP operating as described above adjusts the impedance of the parking unit 40 and the phase correction unit 50 for tuning the resolution of the reproduced video signal and the main waveform characteristics. The first and second impedance adjusting units 60A and 60B to be adjusted are adjusted.

Accordingly, the CPU 30 adjusts the first and second impedance adjusting units 60A and 60B to correct the signal-to-noise ratio when the reproduction signal is poor and to increase the resolution when the recording state is good. By performing the control operation, the image signal processing unit 70 performs a function of maintaining the quality of the image displayed on the CRT in a high state.

The image compensation technique operating as described above is a method of compensating a reproduction signal of a video state with a predetermined pattern set for each viewer's taste by comparing with a preset threshold reference value.

However, the demands of consumers in recent years tend to pursue the reproduction of a more magnificent and lively image, and in order to satisfy such needs, the sound and the image must be adaptively changed in conjunction with the above-described conventional image compensation. Since the technique is to adjust according to the taste of the user based on the state of the simple video playback signal, there is a problem that there is a limit to satisfy the needs of consumers as described above.

An object of the present invention for solving the above problems is to adjust the video signal based on the dynamic sound effect when watching a music video and the like to increase the realism of the video by the adaptive video correction method and To provide the device.

An image correction method of the present invention for achieving the above object is a video correction method in a device capable of reproducing a video signal and an audio signal from a provided source, each of the low frequency band, intermediate frequency band, high frequency band in the audio signal A first process of detecting a sound level, a second process of detecting a level of color and luminance for implementing an image from the video signal, and a sound level for each frequency band obtained through the first process, by comparing with reference levels And a fifth process of generating data on a correction range of the image, and a fifth process of adjusting a display state of the image signal by the correction value calculated in the fourth process, wherein the fifth process is performed by the first process. If only a certain frequency is detected as a result of the process detection, the display status changes depending on the volume or the beat of the sound signal. And further characterized in that to increase the contrast at the time of monologue or solo.

According to an aspect of the present invention, there is provided an apparatus for correcting an audio adaptive image, the apparatus for correcting a video signal and an audio signal separated from a provided source. An acoustic characteristic detector for detecting a level characteristic of an acoustic signal for each intermediate frequency band and a high frequency band, an image characteristic detector for detecting a state of a current video signal by receiving a reproduced video signal, and outputting from the acoustic characteristic detector and an image characteristic detector A controller for controlling a degree of correction of the reproduced image based on the data; And an execution unit configured to change a characteristic of an image signal actually reproduced under the control of the controller, wherein the controller is configured to display a display state according to a volume or a beat of an acoustic signal when only a predetermined frequency is detected by the acoustic characteristic detection unit. The execution unit may be controlled so as to change and increase the sharpness at the time of monologue or solo.

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exemplary configuration diagram of an apparatus for correcting a voice adaptive image according to the present invention. In the present embodiment, a case applied to a VCR will be described as an example.

The VCR to which the voice adaptive video correction device according to the present invention shown in FIG. 2 is applied converts an audio signal that is converted into an electrical signal by accessing an audio signal recorded as a shade of magnetization on an audio track of a videotape. The video signal processor 130, which accesses the video signal recorded in the video track of the videotape with a shade of magnetization, and converts the video signal into an electrical signal, and the signal converted by the sound signal converter 100. ALC / AGC (110) outputs after adjusting the automatic sound level and amplification degree and receives the signal output from the ALC / AGC (110), the image signal is converted and output from the image signal processor 130 The buffer 120 to match the time delay until the display is displayed on the CRT side, and the zero based on the sound signal output from the sound signal converter 100. The image adaptation processor 200 is configured to adjust the color, brightness, contrast, and the like of the video signal output from the image signal processor 130.

Although the image adaptation processor 200 of the above components is shown to some extent in FIG. 2, the detailed configuration is shown in FIG. 3.

Therefore, referring to the configuration of the image adaptation processing unit 200 according to the present invention with reference to FIG. 3, a sound characteristic detection unit for detecting a characteristic of an acoustic signal by receiving a reproduced audio signal, which is not particularly limited to blocks, and An image characteristic detector which receives a reproduced video signal and detects a state of a current image signal, a controller which controls a degree of correction of the reproduced image based on data output from the acoustic characteristic detector and the image characteristic detector, and a control of the controller According to the present invention, it can be classified into an execution unit that changes the characteristics of the image signal actually reproduced.

First, referring to the configuration of the acoustic characteristic detection unit, a low pass filter 201 for receiving a signal output from the sound signal converter shown in FIG. 2 and filtering only a signal of a low frequency band and outputting the low pass filter ( A low pass level detector 2034 which detects and outputs a level of the frequency signal output from 201, and a band pass filter that receives the signal output from the sound signal converter and filters only signals of a predetermined frequency band and outputs the filtered signal; 202, a band level detector 205 for detecting and outputting a level of a frequency signal output from the band pass filter 202, and a signal output from the sound signal converter to filter only signals of a high frequency band A high frequency pass filter 203 for outputting, a high frequency level detector 206 for detecting and outputting a level of a frequency signal output from the high pass filter 203, and And a smoothing circuit 207 for converting the level values output from the level detectors 204 to 206 into DC voltage values, and a DC corresponding to the level values for each frequency domain output through the smoothing circuit 207. And a comparator 209 for comparing the voltage with any reference voltage and outputting the comparison value.

Also, the image characteristic detector receives the signal output from the image signal processor of FIG. 2 and filters only the signals of the low frequency band to output only the luminance signal, and the luminance detector 210 outputs the luminance signal. A luminance level detector 212 that receives the luminance signal, extracts the level, and outputs the level; and a luminance level comparator 214 that compares the level data output from the luminance level detector 212 with preset reference data and outputs the comparison value. And a color detector 211 for outputting a color signal by filtering only signals of a predetermined frequency band by receiving the signal output from the image signal processor, and receiving a color signal output from the color detector 211. A phase reference unit 213 for detecting and outputting a phase difference for each color and a phase reference detected by the phase detector 213. And a phase comparator 215 for comparing the data and outputting the comparison value.

In this case, the reason for detecting the level of the luminance signal by the image characteristic detector as described above is to obtain reference data for emphasizing the luminance of the screen according to the difference in the visual brightness felt by the viewer based on the basic level. The reason for the detection is to obtain reference data for emphasizing a constant color which is visually distinguishing color through phase detection.

In addition, the execution unit receives a signal output from the image signal processor shown in FIG. 2, and includes a sharpness adjusting unit 218 for tuning the brightness and clarity of the video signal, and a color change of the color by receiving the signal output from the image signal processor. The first and second characteristic variable parts 217 and 219 for varying the operational characteristics of the sharpness adjusting part 218 and the color adjusting part 220 according to a control signal input from the control part. And a contrast adjusting unit 221 which receives the signals output from the sharpness adjusting unit 218 and the color adjusting unit 220 and adjusts the brightness of the entire screen according to a control signal input from the control unit.

Finally, the controller receives the data output from the smoothing circuit 207 and outputs the data according to the correction of the video signal according to a predetermined logical association process, the luminance level comparator 214 and And a CPU 216 which receives data according to a current video state characteristic from a phase comparator 215 and controls the execution unit based on the operation data and the comparison data of the comparator 209 from the calculator 208. .

Referring to Figure 4 attached to the preferred operation example of the voice adaptive image correction device according to the present invention configured as described above are as follows.

4 is a diagram illustrating signal waveforms of main parts related to voice in FIG. 3.

First, assuming that the OID signal output from the acoustic signal conversion unit 100 is output in the form of a signal waveform as indicated by reference numeral a in FIG. 4, the low pass filter 201 uses the base of the audio signal input. In order to detect a sound, only a frequency signal belonging to a low frequency is filtered to output a signal as indicated by reference numeral b in FIG. 4.

In addition, the band pass filter 202 filters only frequency signals belonging to a specific frequency band to detect human growth and midtones among the input audio signals, and outputs a signal as indicated by reference numeral c in FIG. 4. .

Similarly, the high pass filter 203 also detects a high-pitched sound among the input audio signals and outputs a signal indicated by reference numeral d in FIG.

The signals output from the filters 201 to 103 are respectively output from the corresponding level detectors 203 to 206, wherein the signals detected and output from the respective level detectors 204 to 206 are smoothed out of the smoothing circuit 207. It changes to DC waveform through.

In this case, the changed DC waveform is transformed and output as shown in the accompanying reference numerals b ', c', and d 'in FIG. 4, and the DC voltage values of the respective bands of the sound are transmitted to the comparator 209. It compares whether the smoothed output value is higher than the input voltage and outputs the comparison value.

When the luminance signal 210 and the color detector 211 detect the luminance signal and the signal for each color, the luminance level detector 212 outputs the signal output from the image signal processor. The luminance signal is input, the level is detected, and transmitted to the luminance level comparator 214. Therefore, the luminance level comparator 214 compares the preset reference data with the level data output from the luminance level detector 212 and outputs the comparison value.

In addition, when the color detector 211 filters only signals of a predetermined frequency band and outputs color signals, the phase detector 213 receives the color signals output from the detector 211 to detect phase differences for each color. To the phase comparator 215. Therefore, the phase comparator 215 compares the preset reference data with the phase data detected by the phase detector 213 and outputs the comparison value.

Accordingly, the calculator 208 constituting the control unit receives the data output from the smoothing circuit 207 and outputs data according to the correction of the video signal according to a predetermined logic operation process, and the CPU 216. Receives data according to the current video state characteristics from the luminance level comparator 214 and the phase comparator 215 and configures the execution unit based on the calculation data from the calculator 208 and the comparison data of the comparator 209. The first and second characteristic variable parts 217 and 219 and the contrast adjusting part 221 are controlled.

Accordingly, the sharpness and color of the image signals output from the sharpness adjusting unit 218 and the color adjusting unit 220 are changed according to the change of the characteristics of the first and second characteristic varying units 217 and 219. The contrast of the screen is adjusted by 221.

According to the present invention, there is provided a voice adaptive image correction method and apparatus which operate as described above, when a change in volume is abrupt or when only a predetermined frequency is detected, such as a monologue or a solo lamp. It can be changed to match the beat and volume, or the monologue and the solo can be made three-dimensional by increasing the screen concentration by increasing the sharpness.

1 is a configuration diagram for explaining the OPR operation

2 is an exemplary configuration diagram of a voice adaptive image correction device according to the present invention.

3 is an exemplary configuration diagram of the image adaptation processor 200 illustrated in FIG. 2.

4 is an exemplary signal waveform diagram of a voice-related main part in FIG.

<Explanation of symbols on main parts of the drawings>

201: low pass filter 202: band pass filter

203: High pass filter 204: Low pass level detector

205: band level detector 206: high frequency level detector

207: smoothing circuit 208: calculator

209: comparator 210: luminance detector

211: color detector 212: luminance level detector

213: phase detector 214: luminance level comparator

215: phase comparator 216: CPU

218: sharpness adjustment unit 220: color adjustment unit

217, 219: characteristic variable part 221: contrast adjusting part

Claims (9)

An image correction method in a device capable of separating and reproducing a video signal and an audio signal from a provided source, the method comprising: A first step of detecting a sound level for each of a low frequency band, an intermediate frequency band, and a high frequency band of the voice signal; A second process of detecting a level of color and luminance of an image from the image signal; A third process of generating data on a correction range of an image by comparing the sound level for each frequency band obtained through the first process with reference levels; And a fifth process of adjusting the display state of the image signal by the correction value calculated in the fourth process. In the fifth process, when only a predetermined frequency is detected as a result of the detection of the first process, the display state is changed according to the volume or the beat of the sound signal, and the sharpness of the voice adaptive image is increased during the monologue or the solo. Way. The method of claim 1, In the first process, a frequency band for detecting a sound level is divided into a low frequency band for detecting a bass sound, a specific frequency band for detecting human growth and a middle sound, and a high frequency band for detecting a sharp high sound. Adaptive voice correction method, characterized in that the loss. The method of claim 1, The level detection of the luminance signal in the second process is to obtain reference data for emphasizing the brightness of the screen according to the difference in the visual brightness felt by the viewer on the basis of the base level. The method of claim 1, In the second process, phase detection is a voice adaptive image correction method, characterized in that to obtain reference data for emphasizing a constant color with strong color discrimination. An image correcting apparatus in a device capable of separating and reproducing a video signal and an audio signal from a provided source, the apparatus comprising: An acoustic characteristic detection unit configured to receive the reproduced audio signal and detect level characteristics of the acoustic signal for each of a low frequency band, an intermediate frequency band, and a high frequency band; An image characteristic detector for receiving a reproduced video signal and detecting a state of a current image signal; A controller for controlling the degree of correction of the reproduced image based on the data output from the acoustic characteristic detector and the image characteristic detector; And an execution unit for changing a characteristic of an image signal reproduced substantially under the control of the controller. The control unit changes the display state according to the volume or the beat of the sound signal when only a predetermined frequency is detected by the sound characteristic detection unit, and controls the execution unit to increase the clarity when reading or soloing. Correction device. The method of claim 5, The acoustic characteristic detection unit may include a low pass filter for receiving a reproduced sound signal and filtering only a signal of a low frequency band; A low pass level detector for detecting and outputting a level of a frequency signal output from the low pass filter; A band pass filter for receiving the reproduced sound signal and filtering and outputting only signals of a predetermined specific frequency band; A band level detector for detecting and outputting a level of the frequency signal output from the band pass filter; A high pass filter for receiving the reproduced sound signal and filtering and outputting only a signal of a high frequency band; A high frequency level detector for detecting and outputting a level of a frequency signal output from the high frequency pass filter; A smoothing circuit for converting and outputting level values output from the level detectors into DC voltage values; And And a comparator for comparing the DC voltage corresponding to the level value of each frequency domain output through the smoothing circuit with an arbitrary reference voltage and outputting the comparison value. The method of claim 5, The image characteristic detection unit receives a reproduced image signal and filters only a signal of a low frequency band and outputs only a luminance signal; A luminance level detector which receives a luminance signal output from the luminance detector and detects and outputs a level; A luminance level comparator for comparing the level data output from the luminance level detector with preset reference data and outputting a comparison value; A color detector which receives the reproduced video signal and filters only signals of a predetermined frequency band and outputs a color signal; A phase detector which receives a color signal output from the color detector and detects and outputs a phase difference for each color; And And a phase comparator configured to compare phase data detected by the phase detector with preset reference data and output a comparison value. The method of claim 5, The execution unit receives a video signal to be reproduced and a sharpness adjusting unit for tuning the brightness and sharpness of the video signal; A color adjusting unit which receives a reproduced video signal and adjusts color change of the color; First and second characteristic varying units configured to vary operational characteristics of the sharpness adjusting unit and the color adjusting unit according to a control signal input from a control unit; And And a contrast adjuster for receiving the signals output from the sharpness adjuster and the color adjuster and adjusting the brightness of the entire screen according to a control signal input from the controller. The method according to any one of claims 5 to 8, The controller may include a calculator that receives data output from the smoothing circuit and outputs data according to a correction of a video signal according to a preset logic operation process; And a CPU configured to receive different data on a current video state characteristic from the luminance level comparator and the phase comparator, and control the execution unit based on the operation data and the comparison data of the comparator from the calculator. Image correction device.