KR101677544B1 - Device of receiving high definition analog video signal - Google Patents

Abstract

A high-resolution analog image receiving apparatus according to embodiments of the present invention includes an analog scan signal receiving unit for receiving an analog scan signal including a color burst signal and an image signal, an analog scan signal converting unit for analog- An analog to digital converter for generating image signal samples and a video signal for interpolating color burst samples to generate interpolated color burst samples and for restoring image components from image signal samples using local signals synchronized to interpolated color burst samples, And a restoration unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a video signal transmission technology, and more particularly, to an analog transmission / reception technique of a high-resolution video.

With the rapid development of image sensor technology, the cost required to acquire high-resolution images has been lowered, and display devices capable of displaying high-resolution images have been developed and spread, and various technologies for transmitting high-resolution images have been proposed.

In particular, high-resolution analog video transmission technologies are being developed and developed along with advanced digital image compression technology and wired / wireless digital signal transmission technology, such as digital terrestrial digital television broadcast service, Internet-based video on demand service, Is becoming popular.

While high-resolution analog video transmission technology is mainly based on digital video data transmission technology, most video surveillance systems around the world are based on analog cameras and analog video transmission infrastructure. In fact, it is known that around 400 million analog video cameras are still being used worldwide. The length of the coaxial cables built to connect them and the scale of the analog infrastructure such as repeaters and distributors are enormous. Although currently installed analog video cameras or DVR systems can easily be replaced with digital video cameras or digital DVRs when upgrading to a full-life or high-resolution system, it will be difficult to replace all the devices at once, It is not easy to replace coaxial cables that have already been complicatedly installed in the surveillance area.

Accordingly, there is a need for a technique capable of transmitting a high-resolution video signal while utilizing the existing analog transmission infrastructure, or a technology capable of integrating a new high-resolution video system into an existing analog transmission infrastructure.

One such technique is High Definition Serial Data Interface (HD-SDI). HD-SDI is SDI's high-definition compliance standard originally proposed by the Society of Motion Picture and Television Engineers (SMPTE) in 1989. It combines 1.485 Gb / s uncompressed, unencrypted digital video signals with conventional BNC connectors and coaxial cable- Lt; / RTI > However, the technology used in broadcasting and film studios in the first place is that the recommended transmission distance of high-resolution video signals is only up to 300 m and the transmission and reception cost is very high.

The HD Composite Video Interface (HD-CVI) proposed by China's Dahua Technology in 2010 is different from HD-SDI, which transmits uncompressed digital video signals in that it transmits analog video signals over coaxial cable. HD-CVI uses a baseband modulation technique and a QAM (Quadrature Amplitude Modulation) technique to avoid cross-talk of CVBS (Composite Video Blanking Sync) Hue signals are transmitted over one cable in a completely separated state in the frequency domain. HD-SDI technology has a longer transmission length, can utilize the existing analog transmission infrastructure, and the chipset and other devices are relatively inexpensive. It may be cheaper to adopt.

HD-CVI technology separates the luminance and color components from each other in the scan line from the frame of the image taken by the camera. The luminance component Y is mounted on the baseband unmodulated and the chrominance components, precisely the chrominance components Cb and Cr, are mounted in a QAM-modulated state on a carrier of a high frequency selected so as not to overlap the bandwidth of the baseband , A waveform in which a front porch, a horizontal sync, a back porch, a color burst, a blank, and an active video are repeated every scan cycle, Lt; / RTI > The modulation signal of the luminance component and chrominance components is transmitted in the active video section.

At this time, since the frequency of the color burst signal is determined according to the carrier frequency for QAM modulation and demodulation of the chrominance components Cb and Cr, a color burst signal is necessarily required to fix the frequency and phase of the carrier wave on the receiving side.

The name HD-CVI is derived from the fact that a luminance signal and a color difference signal are transmitted together on one channel like a conventional analog composite video signal transmission technique.

Since human vision better perceives the difference in luminance than the difference in color, it is reasonable to load luminance information on a high-frequency carrier that is mounted on a baseband that has low distortion and can be restored and is vulnerable to attenuation.

Since most HD-CVI receiving systems simultaneously receive analog video signals from a plurality of channels, a multi-channel, high-performance analog-to-digital converter is required, which is a major factor in increasing the power consumption of the receiver.

Lowering the resolution of the image in the transmitting / receiving system can reduce the required bandwidth and lower the sampling frequency, which can simplify the receiving system and reduce the power consumption, but is not a suitable solution.

Accordingly, there is still a need for a system for receiving a high-resolution image signal with low power consumption while restoring a high-quality image of good quality from an analog video signal using HD-CVI technology.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-resolution analog video signal receiving system capable of using an existing analog transmission infrastructure and reducing power consumption while reducing the complexity of a receiving side.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-resolution analog video demodulator capable of reducing the power consumption of a receiver by receiving a HD-CVI or HD-TVI signal at a sampling rate of about Nyquist of a color burst signal, And a signal receiving system.

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

The apparatus for receiving high resolution analog video signals according to the technical idea of the present invention includes an analog scan signal receiving unit for receiving an analog scan signal including a color burst signal and an image signal, And interpolating the color burst samples to generate interpolated color burst samples and using the localized signals synchronized to the interpolated color burst samples to interpolate image components from the video signal samples And a video signal reconstruction unit for reconstructing the video signal.

According to an aspect of the present invention, there is provided a high-resolution analog image receiving apparatus including an analog scan signal receiving unit for receiving an analog scan signal including a color burst signal and a video signal, an analog-digital converter for analog- Interpolating the analog to digital converted data to generate interpolated color burst samples and interpolated video signal samples and restoring the image components from the interpolated video signal samples using local signals synchronized to the interpolated color burst samples And a video signal restoration unit.

According to an aspect of the present invention, there is provided a high-resolution analog image receiving method including receiving an analog scan signal including a color burst signal and a video signal, analog-to-digital converting the received analog scan signal, Generating localized signals that are synchronized with the interpolated color burst samples interpolated between the color burst samples, and recovering image components from the image signal samples of the analog to digital converted data using the localized signals .

According to an aspect of the present invention, there is provided a high-resolution analog image receiving method including receiving an analog scan signal including a color burst signal and a video signal, analog-to-digital converting the received analog scan signal, Generating a local signal whose frequency and phase are synchronized with respect to the interpolated color burst samples of the interpolated samples and interpolating the interpolated color burst samples from the interpolated image signal samples of the interpolated samples using the local signal And reconstructing the image components.

According to the high-resolution analog video signal receiving apparatus of the present invention, the existing analog transmission infrastructure can be used, and the power consumption can be reduced while reducing the complexity of the receiving side.

According to the high-resolution analog video signal receiving apparatus of the present invention, the power consumption of the receiving end can be reduced by receiving the existing HD-CVI or HD-TVI signal at a sampling rate of about Nyquist of the color burst signal and demodulating the color signal have.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a block diagram illustrating an apparatus for receiving a high-resolution analog video signal according to an exemplary embodiment of the present invention.
2 is a waveform diagram illustrating waveforms of an analog scan signal of a scan period received by a high-resolution analog image signal receiving apparatus according to an exemplary embodiment of the present invention.
3 is a block diagram illustrating an image signal restoring unit of a high-resolution analog image signal receiving apparatus according to an exemplary embodiment of the present invention.
4 is a block diagram illustrating an apparatus for receiving a high-resolution analog video signal according to another embodiment of the present invention.
5 is a block diagram illustrating an image signal restoring unit of a high-resolution analog image signal receiving apparatus according to another embodiment of the present invention.
6 is a flowchart illustrating an image restoration method in a high-resolution analog image signal receiving apparatus according to an exemplary embodiment of the present invention.
7 is a flowchart illustrating an image restoration method in a high-resolution analog image signal receiving apparatus according to another embodiment of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a block diagram illustrating an apparatus for receiving a high-resolution analog video signal according to an exemplary embodiment of the present invention.

1, an apparatus 10 for receiving a high-resolution analog image signal according to an exemplary embodiment of the present invention includes an analog scan signal receiver 11, an analog-to-digital converter (A / D) 12, 13).

Specifically, the analog scan signal receiving unit 11 can receive an analog scan signal from the camera or from the repeater, and perform appropriate analog signal compensation operations. For example, the analog scan signal receiving unit 11 performs amplification, filtering, and equalization on the received analog scan signal to compensate for distortion during transmission and restore the DC level through clamping.

At this time, in the camera or high-resolution analog video signal transmission system 15, the analog scan signal is generated so as to include a video signal obtained by modulating a plurality of video components using a carrier wave of a predetermined frequency, and a color burst signal having a frequency and phase of a carrier wave And is transmitted to the high-resolution analog video signal receiving apparatus 10 through the coaxial cable 14. [

The analog scan signal is an analog signal according to the HD-CVI (High Definition Composite Video Interface) standard, and the plurality of image components are luminance components and chrominance components, respectively. The luminance component may be unmodulated on the baseband and the chrominance components may be up-modulated using a carrier wave, for example, according to a QAM modulation technique.

The analog-to-digital converter 12 may analog-to-digital convert the analog scan signal modulated to include the color burst signal and the video signal to generate color burst samples and video signal samples.

The image signal restoration unit 13 can restore image components from the image signal samples using the local signals synchronized with the frequency and phase of the carrier based on the color burst samples and the interpolating interpolated color burst samples have.

2 is a waveform diagram illustrating waveforms of an analog scan signal of a scan period received by a high-resolution analog image signal receiving apparatus according to an exemplary embodiment of the present invention.

2, in an apparatus for receiving a high-resolution analog image signal according to the present invention, an analog scan signal is a waveform in which actual image components are modulated each time a horizontal sync signal and a color burst signal, which are one of the timing signals, An analog video signal may be generated.

Since the color burst signal of the HD-CVI system is derived from the analog image system as seen from the form and position, and the carrier used for QAM modulation of the chrominance components is a color burst signal, the HD- It is necessary to accurately recover the frequency and phase of the color burst signal.

However, in the past analogue television system, the color burst signal was about 3.5 MHz, whereas in the HD-CVI system, the color burst signal was about 40 MHz in the case of 1080p resolution.

In the HD-CVI receiving system, in order to fix the frequency and phase of the local oscillation signal (or local signal) to approximately 40 MHz carrier, the analog-to-digital converter Can be set.

Even if the sampling rate is low, the frequency and phase of the color burst signal can be fixed, but if the fixed time is long, the video loss may increase.

Due to this problem, existing HD-CVI or HD-TVI receiving systems are required to provide color burst signals with a much higher sampling rate than the Nyquist frequency of the color burst signal, so that the local oscillation signal can be quickly and accurately fixed to the received color burst signal. The burst signal, and the analog scan signal. Accordingly, a conventional HD-CVI or HD-TVI receiving system can reduce video loss, but consumes a lot of power.

The image signal restoring unit 13 of the high resolution analog image signal receiving apparatus 10 of the present invention samples the color burst signal at a sampling rate as low as the Nyquist frequency of the color burst signal, A detailed configuration capable of fixing the local signal accurately and quickly according to the frequency and phase of the carrier wave from the carrier can be described with reference to FIGS. 3 and 4. FIG.

3 is a block diagram illustrating an image signal restoring unit of a high-resolution analog image signal receiving apparatus according to an exemplary embodiment of the present invention.

3, the video signal restoring unit 13 includes a color burst sample extracting unit 131, an interpolation filtering unit 132, a first phase locked loop 133, a second phase locked loop 134, and a demodulating unit 135 ).

Specifically, the color burst sample extracting unit 131 may extract the color burst samples CB1 corresponding to the color burst signal interval among the samples of the analog scan-converted analogue signal.

The interpolation filtering unit 132 may generate interpolated color burst samples CB2 interpolating the color burst samples CB1.

At this time, the color burst samples CB1 are discrete data sequences having a sampling rate on the order of the Nyquist frequency or slightly higher. The interpolated color burst samples CB2 interpolating these color burst samples CB1 are expected to be substantially unlike the color burst samples analog-digitally converted from the beginning with a high sampling rate.

Particularly, the color burst signal is basically a sinusoidal signal in which the frequency and the phase are strictly determined, so that it can be more effectively interpolated.

Accordingly, by using the interpolation filtering unit 132 in the video signal restoring unit 13, the sampling rate of the analog-to-digital converting unit 12 at the front end is lowered to the Nyquist frequency of the bandwidth of the carrier wave or analog scan signal .

The first phase locked loop 133 generates a synchronized first discrete time oscillation output signal DTO_OUTl based on the interpolated color burst samples CB2 interpolating the color burst samples CB1.

According to an embodiment, the first phase locked loop 133 is a digital phase locked loop comprising a phase comparator 1331, a loop filter 1332, a frequency / phase error detector 1333, a Discrete Time Oscillator (DTO) Numerical Controlled Oscillator) 1334 and a first sinusoidal signal lookup table 1335. The first and second sinusoidal signal lookup tables 1335 and 1335 may be referred to as "

The phase comparator 1331 compares the phase of the input signal, that is, the interpolated color burst samples CB2, with the phase of the fixed signal, i.e., the first sine wave SIN1 output from the first LUT 1335, And outputs information and phase difference information.

The loop filter 1332 is a kind of low frequency filter, and the frequency / phase error detector 1333 outputs the frequency / phase control signal according to the filtered frequency difference information and the phase difference information.

The discrete time oscillator (DTO) 1334 is also referred to as a numerically controlled oscillator (NCO) and generates a first discrete time oscillation output signal DTO_OUT1 that oscillates at a frequency in accordance with the frequency / phase control signal.

The second phase locked loop 134 adjusts the phase of the second discrete time oscillation output signal DTO_OUT2 by downsampling the first discrete time oscillation output signal DTO_OUT1 to generate a local signal to be applied to the demodulator 135 local signal (LOCAL). The local signal (LOCAL) means a sinusoidal wave and a sine wave that can be mixed into the modulation signal in the receiving system for QAM demodulation.

Specifically, the second phase locked loop 134 includes a second discrete time oscillation (DCT) that is a downsampled sampling rate of the first discrete time oscillation output signal (DTO_OUTl) to be equal to a sampling rate of the color burst samples CB1 before interpolation Generates the output signal DTO_OUT2 and controls the phase of the second discrete time oscillation output signal DTO_OUT2 to synchronize the second sinusoidal wave SIN2 with the color burst samples CB1 to generate the local signal LOCAL can do.

To this end, the second phase locked loop 134 may include a phase comparator 1341, a loop filter 1342, a phase error detector 1343, a down sampler 1344 and a second sinusoidal lookup table 1345 .

First, the down-sampler 1344 down-samples the sampling rate of the first discrete time oscillation output signal DTO_OUT1 to be equal to the sampling rate of the color burst samples CB1 before interpolation.

The phase comparator 1341 compares the phases of the second sinusoidal wave SIN2 and the color burst samples CB1 whose sampling rate is reduced by the down sampler 1344 and outputs the phase difference information.

The phase difference information through the loop filter 1342 is applied to a phase error detector 1343 and the phase error detector 1343 generates a phase control signal in accordance with the filtered phase difference information.

The second sine wave lookup table 1345 can generate the local signal LOCAL by adjusting the phase of the second sine wave SIN2 according to the phase control signal.

Since the second phase locked loop 134 adjusts only the phase with respect to the first discrete time oscillation output signal DTO_OUT1 whose frequency is fixed in the first phase locked loop 133, no separate numerically controlled oscillator is required, It can be implemented simply.

The demodulator 135 may recover the image components from the image signal samples by the local signal LOCAL.

On the other hand, the first phase locked loop 133 should be relatively high in operating speed because the interpolation is based on the interpolated color burst samples CB2 whose number of samples is increased by interpolation, but the second phase locked loop 134 is not interpolated The color burst samples CB1 and the downsampled second sinusoidal wave SIN2, so that the operation speed may be relatively low.

Accordingly, only the first phase locked loop 133 can operate at a speed similar to that of the conventional system, and the speed of the remaining components, particularly, the analog-to-digital converter 12 and the demodulator 135 can be significantly lowered, , The power consumption and the area of the chip can both be reduced, and there is almost no problem in restoring the video signal.

Although the embodiment of FIG. 3 is an embodiment for interpolating only the color burst signal to synchronize the local signals, it is also possible to synchronize the local signals after interpolating all the input analog scan signals. do.

4 is a block diagram illustrating an apparatus for receiving a high-resolution analog video signal according to another embodiment of the present invention.

4, a high-resolution analog video signal apparatus 40 according to another embodiment of the present invention includes an analog scan signal receiving unit 41, an analog-digital converter 42, an interpolation filtering unit 43, (44).

The analog scan signal receiving unit 41 receives an analog scan signal from the camera in the same manner as the analog scan signal receiving unit 11 of FIG.

Here, the analog scan signal is supplied to the camera or the high-resolution analog video signal transmitting system 15 so as to include a video signal obtained by modulating a plurality of video components using a carrier wave of a predetermined frequency and a color burst signal having a frequency and phase of the carrier wave And can be transmitted to the high-resolution analog video receiving apparatus 60 through the coaxial cable 14. [

Like the analog-to-digital converter 12 of FIG. 1, the analog-to-digital converter 42 can analog-to-digital convert the received analog scan signal to generate color burst samples and video signal samples.

The interpolation filtering unit 43 may interpolate color burst samples and image signal samples, respectively, to generate interpolated color burst samples and interpolated image signal samples.

Unlike the embodiment of FIG. 1, the interpolation filtering unit 43 of FIG. 4 performs interpolation over all of the analog-to-digital converted samples to produce interpolated color burst samples and interpolated video signal samples.

The video signal reconstruction unit 44 may generate a local signal synchronized with the frequency and phase of the interpolated color burst samples, and reconstruct the image components from the interpolated video signal samples using the local signal.

1, unlike the configuration in which the video signal samples are demodulated with the local signals of the sampling rate reduced again after interpolation in the embodiment of FIG. 1, the local signal of the high sampling rate To demodulate interpolated video signal samples of a high sampling rate which are likewise not reduced after interpolation. The video signal restoring unit 44 can be implemented using a high-speed digital signal processor (DSP), and can be relatively easily implemented rather than speed up the analog-to-digital converter.

However, the embodiment of FIG. 4 can operate with a low sampling rate close to the Nyquist frequency, as in the embodiment of FIG.

5 is a block diagram illustrating an image signal restoring unit of a high-resolution analog image signal receiving apparatus according to another embodiment of the present invention.

5, the video signal restoring unit 44 according to another embodiment of the present invention may include a color burst sample extracting unit 441, a phase locked loop 442, and a demodulating unit 443.

First, the interpolation filtering unit 43 generates interpolated color burst samples CB2 from the color burst samples CB1 output from the analog-to-digital conversion unit 42, And generates interpolated video signal samples from the output video signal samples.

The image signal reconstruction unit 44 reconstructs image components using the interpolated color burst samples and the interpolated image signal samples interpolated by the interpolation filtering unit 43.

The color burst sample extracting unit 441 can extract interpolated color burst samples and interpolated color burst samples from interpolated color burst samples and interpolated video signal samples in the interpolation filtering unit 43. [

The phase locked loop 442 may generate a local signal LOCAL that is frequency and phase synchronized to the interpolated color burst samples.

To this end, the phase locked loop 442 specifically includes, as a digital phase locked loop, a phase comparator 4421, a loop filter 4422, a frequency / phase error detector 4423, a DTO 4424 and a sinusoidal lookup table 4425 ).

The phase comparator 4421 compares the phase of the input signal, that is, the interpolated color burst samples CB2, with the phase of the sinusoidal wave SIN output from the LUT 4425, and outputs the frequency difference information and the phase difference information .

The loop filter 4422 is a kind of low frequency filter, and the frequency / phase error detector 4423 outputs a frequency / phase control signal in accordance with the filtered frequency difference information and the phase difference information.

A discrete time oscillator (DTO) 4424 generates a discrete time oscillation output signal DTO_OUT that oscillates at a frequency in accordance with the frequency / phase control signal.

The lookup table 4425 can generate the local signal LOCAL to be applied to the demodulator 443 by adjusting the phase of the discrete time oscillation output signal DTO_OUT in accordance with the frequency / phase control signal.

The demodulator 443 can recover the image components from interpolated video signal samples having an increased sampling rate through interpolation, using a local signal having an increased sampling rate through interpolation.

6 is a flowchart illustrating an image restoration method in a high-resolution analog image signal receiving apparatus according to an exemplary embodiment of the present invention.

In step S61, the high-resolution analog video signal receiving apparatus 10 can receive an analog scan signal from the camera.

Here, the analog scan signal may be generated to include a video signal modulating a plurality of image components using a carrier wave of a predetermined frequency, and a color burst signal having a frequency and phase of a carrier wave.

In step S62, the high-resolution analog video signal receiving apparatus 10 can analog-to-digital convert the received analog scan signal to generate color burst samples and video signal samples.

In step S63, the high-resolution analog video signal receiving apparatus 10 can generate a local signal whose frequency and phase are synchronized based on the interpolated color burst samples interpolated from the color burst samples.

According to an embodiment, generating local signals in step S63 includes extracting color burst samples, interpolating color burst samples to generate interpolated color burst samples, interpolating the color burst samples for interpolated color burst samples Generating a synchronized sinusoidal wave, and generating a local signal by adjusting the phase of the sinusoidal wave according to the color burst samples.

In step S64, the high-resolution analog video signal receiving apparatus 10 may include restoring image components from the video signal samples based on the generated local signal.

7 is a flowchart illustrating an image restoration method in a high-resolution analog image signal receiving apparatus according to another embodiment of the present invention.

In step S71, the high-resolution analog video signal receiving apparatus 40 can receive the analog scan signal from the camera.

Here, the analog scan signal is generated by the camera or the high-resolution analog video signal transmitting apparatus to include a video signal modulating a plurality of image components using a carrier wave of a predetermined frequency, and a color burst signal having a frequency and phase of a carrier wave .

In step S72, the high-resolution analog video signal receiving apparatus 40 can analog-to-digital convert the received analog scan signal.

Specifically, in step S72, the high-resolution analog video signal receiving apparatus 40 can analog-to-digital convert the received analog scan signal to generate color burst samples and video signal samples.

In step S73, the high-resolution analog video signal receiving apparatus 40 can interpolate the analog-to-digital converted data.

Specifically, in step S73, the high-resolution analog video signal receiving apparatus 40 may interpolate the color burst samples and the video signal samples, respectively, to generate interpolated color burst samples and interpolated video signal samples.

In step S74, the high-resolution analog video signal receiving apparatus 40 can generate a local signal whose frequency and phase are synchronized with interpolated interpolated color burst samples.

Specifically, in step S74, the high-resolution analog video signal receiving apparatus 40 can generate a local signal whose frequency and phase are synchronized with the interpolated color burst samples.

In step S75, the high-resolution analog video signal receiving apparatus 40 can recover the image components from the interpolated samples, for example, interpolated video signal samples, based on the synchronized local signal.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood that variations and specific embodiments which may occur to those skilled in the art are included within the scope of the present invention.

10, 40 high resolution analog video receiver
11, 41 Analog scan signal receiver
12, 42 analog digital conversion section
13, and 44,
131, 441 color burst sample extracting unit
132, 43 interpolation filtering unit
133, 134, 442 phase locked loops
135, 443 demodulator
14 Cable
15 camera or high-resolution analog video transmission system

Claims (8)

An analog scan signal receiving unit for receiving an analog scan signal including a color burst signal and a video signal;
An analog-to-digital converter (ADC) for analog-to-digital converting the received analog scan signal to generate color burst samples and image signal samples; And
And an image signal reconstruction unit for interpolating the color burst samples to generate interpolated color burst samples and for restoring image components from the image signal samples using a local signal synchronized with the interpolated color burst samples,
Wherein the video signal restoring unit comprises:
A color burst sample extracting unit for extracting the color burst samples;
An interpolation filtering unit interpolating the color burst samples to generate the interpolated color burst samples;
A first phase locked loop generating a first discrete time oscillation output signal synchronized to a frequency of the interpolated color burst samples;
A second phase locked loop for generating the localized signal by downsampling the first discrete time oscillation output signal to produce a second discrete time oscillation output signal and regulating the phase of the second discrete time oscillation output signal; And
And a demodulator for recovering the image components from the image signal samples by the local signal. delete The method of claim 1, wherein the second phase locked loop
And a downsampler for downsampling the sampling rate of the first discrete time oscillation output signal such that a sampling rate of the first discrete time oscillation output signal is equal to a sampling rate of the color burst samples. delete delete A high-resolution analog video receiving method using a high-resolution analog video signal receiving apparatus,
Receiving an analog scan signal including a color burst signal and a video signal;
Analog-to-digital converting the received analog scan signal;
Generating a localized signal that is synchronized with interpolated color burst samples interpolating color burst samples of the analog to digital converted data; And
And restoring image components from the image signal samples of the analog to digital converted data using the local signal
Wherein the generating the local signal comprises:
Extracting color burst samples from the analog-to-digital converted data;
Generating a sinusoidal wave whose frequency is synchronized with the interpolated color burst samples interpolating the color burst samples; And
And generating the local signal by adjusting the phase of the sinusoidal wave according to the color burst samples.
delete delete

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