KR101739822B1 - Method and apparatus for compressing analog image signal - Google Patents

Abstract

A method and apparatus for compressing an analog video signal are provided. A method and apparatus for compressing an analog video signal divides a horizontal line of an analog video signal into a predetermined number of intervals, calculates image complexity of each interval, classifies the intervals into a plurality of groups based on the image complexity, The compressed analog video signal can be generated based on the compressed sections.

Description

TECHNICAL FIELD [0001] The present invention relates to an analog video signal compression method and apparatus,

The technical field relates to an analog image signal processing technique, and more particularly, to a method of compressing an analog image signal.

A method of transmitting an image includes a method using an open circuit and a method using a closed circuit. Since a method using an open circuit transmits an image signal to a plurality of unspecified users, a standardized method can be used to transmit the image. On the other hand, since a method of transmitting an image using a closed circuit is to transmit a video signal to only a specific user, only a specific user may know a method of transmitting the video signal.

In general, the composite signal used in a closed circuit system follows a standard method for analog color television. Since the standard method uses a limited frequency band, cross color problems and luminance blending problems may occur.

Korean Unexamined Patent Application Publication No. 10-2007-0074804 (published on July 18, 2007) discloses a DVR device and a video signal compression method thereof that improve a video signal transmission function to a network. The present invention discloses a digital video camera, comprising: a plurality of ADC (Analog Digital Converter) units for converting analog video signals received from a plurality of surveillance cameras into respective digital video signals; A second encoder unit for compressing one or more digital video signals output from the MUX unit to a predetermined size, and a second encoder unit for outputting the output from the MUX unit, And a first encoder unit for compressing the one or more digital video signals to a different size from the second encoder unit. The disclosure invention can improve the transmission function of the DVR device to the network.

One embodiment can provide an apparatus and method for compressing an analog video signal.

One embodiment can provide an apparatus and method for decoding an analog video signal.

According to an aspect of the present invention, there is provided an analog video signal compression method, comprising: dividing a horizontal line of an analog video signal into a predetermined number of intervals; calculating image complexity of each of the intervals; Classifying the intervals into a plurality of groups, respectively, compressing the intervals according to the classified group, and generating compressed analog video signals based on the compressed intervals.

Dividing the horizontal line into a predetermined number of intervals may include dividing an active region of the horizontal line into the predetermined number of intervals.

Dividing the horizontal line into a predetermined number of intervals may further include compressing a horizontal blank of the horizontal line to a predetermined compression rate.

The analog video signal compression method may further include the step of displaying the compression method by compressing the intervals on the horizontal line.

The step of displaying the compression method compressing the intervals on the horizontal line may be a step of displaying the compression method on a horizontal blank of the horizontal line.

The compression method may be indicated in a burst of the horizontal blank.

The compression method can be displayed by adjusting the phase of the signal of the burst according to the compression method.

The compression method can be displayed by adjusting the frequency of the signal of the burst according to the compression method.

The compression method can be displayed by adjusting the length of the signal of the burst according to the compression method.

The compression method may be displayed in a horizontal sync of the horizontal blank.

The method of compressing an analog video signal may further include determining a format of the horizontal line.

Dividing the horizontal line into a predetermined number of intervals may be performed when the format of the horizontal line is an active horizontal line.

The method of compressing an analog video signal may further include compressing the horizontal line at a predetermined compression rate when the format of the horizontal line is not an active horizontal line.

The compressing may comprise down-scaling the pixels of the interval at a compression rate set in the group.

The analog video signal compression method may further include transmitting the compressed analog video signal using a coaxial cable.

The analog image signal may be a signal of an ultra high definition (UHD) image or a signal of 8K UHD image.

The method further comprises the step of comparing the horizontal line with a previous horizontal line and displaying an area of the horizontal line that refers to a previous horizontal line on a horizontal line based on a result of the comparison Dividing the horizontal line into a predetermined number of intervals may include dividing the area of the horizontal line that does not refer to the previous horizontal line into a predetermined number of intervals.

The analog video signal compression method may further include comparing a frame to be processed with a previous frame, and displaying a portion of the frame that refers to the previous frame in the frame based on the comparison result Dividing the horizontal line into a predetermined number of intervals may include dividing an area of the horizontal line of the current frame that does not refer to the previous frame into a predetermined number of intervals.

According to another aspect of the present invention, there is provided an analog video signal compression apparatus, comprising: a communication unit for receiving an analog video signal; and an image compression unit for calculating image complexity of each of the intervals and classifying the intervals into a plurality of groups based on the image complexity, And compresses the sections according to the group, and generates a compressed analog image signal based on the compressed sections.

According to yet another aspect, an analog video signal decoding method includes receiving an analog video signal, detecting a compression method displayed within a horizontal line of the analog video signal, And decoding the line.

The step of decoding the horizontal line based on the compression method may be a step of decoding the horizontal line using a decoding method corresponding to the compression method.

The decoding of the horizontal line based on the compression method may include dividing an active region of the horizontal line into a predetermined number of intervals, and decoding each of the intervals based on the compression method Step < / RTI >

The detecting of the compression method may be a step of detecting the compression method displayed on a horizontal blank of the horizontal line.

The compression method may be indicated in a burst of the horizontal blank.

The step of detecting the compression method may be a step of detecting the compression method indicated by adjusting the phase of the signal of the burst according to the compression method.

The step of detecting the compression method may be a step of detecting the compression method indicated by adjusting the frequency of the signal of the burst in accordance with the compression method.

The step of detecting the compression method may be a step of detecting the compression method indicated by adjusting the length of the signal of the burst according to the compression method.

The compression method may be displayed in a horizontal sync of the horizontal blank.

The step of receiving the analog video signal may be a step of receiving the analog video signal using a coaxial cable.

According to another aspect of the present invention, there is provided an apparatus for decoding an analog video signal, the apparatus comprising: a communication unit for receiving an analog video signal; and a control unit for detecting a compression method displayed in a horizontal line of the analog video signal, And a processor that decodes the data.

An apparatus and method for compressing an analog video signal are provided.

An apparatus and method for decoding an analog video signal are provided.

1 illustrates an analog video signal transmission / reception system according to an example embodiment.
2 is a block diagram of an analog video signal compression apparatus according to an exemplary embodiment of the present invention.
3 is a flowchart of an analog video signal compression method according to an exemplary embodiment.
4 is a flowchart of a method of dividing a horizontal line of an analog video signal according to an example into a predetermined number of intervals.
5 shows a frame represented by an analog video signal according to an example.
FIG. 6 illustrates a horizontal line of an analog video signal according to an example.
FIG. 7 illustrates an active area of a horizontal line divided into four sections according to an example.
8 is a flowchart of an analog video signal compression method according to another example.
FIG. 9 illustrates bursts of signals that are phase adjusted in accordance with a compression method according to an example.
FIG. 10 shows the signals of the frequency-adjusted burst according to the compression method according to an example
Figure 11 shows the signals of a burst of length adjusted according to the compression method according to an example
12 shows a method of indicating a compression method in a horizontal sync according to an example.
13 and 14 illustrate a method of indicating a compression method in a front burst interval according to an example.
FIG. 15 illustrates a method of indicating a compression method in a back burst interval according to an example.
16 is a flowchart of an analog video signal compression method using a previous horizontal line according to an example.
17 is a flowchart of an analog video signal compression method using a previous frame according to an example.
18 is a configuration diagram of an analog video signal decoding apparatus according to an embodiment.
19 is a flowchart of an analog video signal decoding method according to an embodiment.
20 is a flowchart of a method for decoding a horizontal line according to an example.

In the following, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

1 illustrates an analog video signal transmission / reception system according to an example embodiment.

The analog video signal transmission and reception system 100 includes an analog video signal compression apparatus 110 (hereinafter, the analog video signal compression apparatus 110 is outlined as a compression apparatus 110) and an analog video signal decoding apparatus 120 The analog video signal decoding apparatus 120 is outlined in the decoding apparatus 120). For example, the analog video signal transmission / reception system 100 may be a closed circuit television (CCTV) system.

The compression device 110 can compress the analog video signal and transmits the compressed analog video signal to the decoding device 120. For example, the compression device 110 may transmit the compressed analog video signal through the cable 130 to the decoding device 120. The cable 130 may be a coaxial cable.

For example, a clock frequency of 13.5 MHz is required to transmit a 720x480 progressive image at 30 frames per second, and a clock frequency of 297MHz is required for an Ultra High Definition (UHD) image. And a clock frequency of 1.188 GHz is required for an 8K UHD image. The higher the resolution of the image, the higher the frequency is required to transmit the image, and there may be a limit to transmitting the higher frequency in the analog format. A method of compressing a video signal to transmit a high-resolution video signal in an analog format can be considered.

A method for compressing an analog video signal by the compression apparatus 110 will be described in detail below with reference to FIGS. 2 to 15, and for a method for the decoding apparatus 120 to decode a compressed analog video signal, 16 and 17, respectively.

2 is a block diagram of an analog video signal compression apparatus according to an exemplary embodiment of the present invention.

The compression device 110 includes a communication unit 210, a processor 220, and a storage unit 230.

The communication unit 210 is connected to an external device and transmits / receives data. For example, the communication unit 210 may receive an analog video signal. The analog video signal may be a signal obtained by converting the digital video signal, and the digital video signal may be generated by the camera.

The processor 220 processes the data received by the communication unit 210 and the data stored in the storage unit 230.

The storage unit 230 stores data received by the communication unit 210 and data processed by the processor 220.

The communication unit 210, the processor 220, and the storage unit 230 will be described in detail below with reference to FIGS. 3 to 15. FIG.

3 is a flowchart of an analog video signal compression method according to an exemplary embodiment.

In step 310, the processor 220 may divide the horizontal line of the analog video signal into a predetermined number of intervals. The analog video signal may be a standard definition (SD) video, a full high definition video, a UHD, or an 8K UHD video signal. The detailed specification of the analog video signal is explained using [Table 1] below.

SD (720x480) FHD (1920x1080) UHD (3840x2160) 8K (8192x4320) H V H V H V H V Total number 858 525 2200 1125 4400 2250 8800 4500 Active area 720 480 1920 1080 3840 2160 8192 4320 Blank 138 45 280 45 560 90 608 180 frame
Rate 30 30 30 30 Frame time
(ms) 33.3333 33.3333 33.3333 33.3333 Number of total pixels 450450 2475000 9900000 39600000 Pixel clock
(MHz) 13.5135 74.25 297 1188

In Table 1, H is the number of data corresponding to pixels or pixels included in one horizontal line, and V is the number of horizontal lines included in one frame. For example, in the case of an analog video signal of UHD, the number of horizontal lines is 2250, and each horizontal line may include 4400 pixels. Hereinafter, a pixel can be understood as meaning a pixel or data representing a value of a pixel.

The processor 220 divides the horizontal line into a predetermined number of intervals. For example, the processor 220 may divide the active region of the horizontal line into a predetermined number of intervals. A method of dividing the active area of the horizontal line into a predetermined number of intervals will be described in detail below with reference to FIG.

In step 320, the processor 220 calculates the image complexity of the divided intervals. For example, the processor 220 may calculate the image complexity based on the color values of the pixels included in each interval. If the color value of the pixels is large, the image complexity can be calculated large, and if the color value is small, the image complexity can be calculated low.

At step 330, the processor 220 classifies the intervals into a plurality of groups based on the image complexity. The plurality of groups may be groups classified according to image complexity. For example, the sections with the largest image complexity are classified into the first group, and the sections with the lowest image complexity are classified into the second group.

A plurality of groups will be described in detail below with reference to FIG.

At step 340, the processor 220 compresses the intervals, respectively, according to the classified group. For example, a group with a high image complexity may have a low compression rate, and a group with a low image complexity may have a high compression rate. The compression rate for each group can be set in advance.

According to one aspect, the processor 220 may down-scramble the pixels of the interval at a compression rate set in the group.

At step 350, the processor 220 generates a compressed analog video signal based on the compressed intervals. The processor 220 may generate a compressed analog video signal using horizontal lines for one frame.

4 is a flowchart of a method of dividing a horizontal line of an analog video signal according to an example into a predetermined number of intervals.

The above-described step 310 in FIG. 3 may include the following steps 410 and 420.

At step 410, the processor 220 may divide the active area of the horizontal line into a predetermined number of intervals. For example, in the case of a UHD analog video signal, the horizontal line may include an active area including 3840 pixels and a horizontal blank including 560 pixels. The processor 320 may divide 3840 pixels into four sections, which are a predetermined number. Each interval may include 960 pixels.

At step 420, the processor 220 may compress the horizontal blank of the horizontal line to a preset compression ratio. For example, if the predetermined compression ratio is 50%, the analog image signal of the UHD can be compressed to 280 pixels of 560 pixels of the horizontal blank.

5 shows a frame represented by an analog video signal according to an example.

The analog video signal may represent a frame 500. The frame 500 may be implemented with a plurality of horizontal lines, and the horizontal lines may be horizontal lines including the vertical blank line 520 or the active area 550. Each of the horizontal lines including the active area 550 may include a horizontal blank 540. For example, in the case of an analog video signal of UHD, the total number of vertical lines 510 is 2250, the number of vertical blank lines 520 is 90, and the number of horizontal lines including the active area 550 is 2160. Each horizontal line including the active area 550 includes 560 pixels of the horizontal blank 540 and 3840 pixels of the active area 550. [

FIG. 6 illustrates a horizontal line of an analog video signal according to an example.

A horizontal line 610, which is not a horizontal line constituting the vertical blank line, includes a horizontal blank area 611, a horizontal sync 612, a front burst interval 612, An active area 613, a burst 614, a back burst interval 615, and an active area 616. Horizontal line 610 may include pixels or samples corresponding to each region. The horizontal blank area 611, the horizontal sync 612, the front burst interval 613, the burst 614, and the back burst interval 615 may be included in the horizontal blank 540 described above in FIG.

FIG. 7 illustrates an active area of a horizontal line divided into four sections according to an example.

In step 410 of FIG. 4 described above, the processor 220 may divide the active area 616 of the horizontal line into a predetermined number of intervals. For example, the processor 220 may divide the active area 616 of the horizontal line into a first section 710, a second section 720, a third section 730, and a fourth section 740. Each section may be the same size. For the UHD analog video signal, each interval may include 960 pixels.

3, the processor 220 may calculate the image complexity for the first interval 710, the second interval 720, the third interval 730, and the fourth interval 740 have.

3, the processor 220 classifies the first section 710 into a first group based on the image complexity, classifies the second section 720 into a second group, The third section 730 and the fourth section 740 may be classified into a third group. The first group may be a group with a compression rate of 0%, the second group with a compression ratio of 50%, and the third group with a compression ratio of 75%.

Table 2 below shows compressed sections of the analog video signal of the UHD using various schemes. The method shown in [Table 2] is only an example, and can be variously modified according to the implementation method.

Section 1 The second section Section 3 Section 4 Horizontal blank Total number case 1 960 480 240 240 280 2200 case 2 960 240 480 240 280 2200 case 3 960 240 240 480 280 2200 case 4 480 960 240 240 280 2200 case 5 240 960 480 240 280 2200 case 6 240 960 240 480 280 2200 case 7 480 240 960 240 280 2200 case 8 240 480 960 240 280 2200 case 9 240 240 960 480 280 2200 case 10 480 240 240 960 280 2200 case 11 240 480 240 960 280 2200 case 12 240 240 480 960 280 2200 case 13 480 480 480 480 280 2200 case 14 720 720 240 240 280 2200 case 15 240 720 720 240 280 2200 case 16 240 240 720 720 280 2200

A section where the number of compressed pixels is 960 belongs to a group having a compression rate of 0% and a section where the number of compressed pixels is 720 belongs to a group having a compression rate of 25%, and a section where the number of compressed pixels is 480 The section belonging to the group having the compression rate of 50% and the section having the number of compressed pixels of 240 belongs to the group having the compression rate of 75%. The horizontal blank is compressed to a compression ratio of 50%.

[Table 3] below is a detailed specification of the UHD analog video signal before compression and a detailed specification of the UHD analog video signal after compression.

Before compression After compression H V H V Total number 4400 2250 2200 2250 Active area 3840 2160 1920 2160 Blank 560 90 280 90 Frame rate 30 30 Frame time (ms) 33.33333 33.33333 Number of total pixels 9900000 4950000 Pixel Clock (MHz) 297 148.5

The horizontal line of the analog video signal of the UHD before compression includes 4400 pixels, but since it contains 2200 pixels after compression, the horizontal line is compressed to 50% compression as a whole. By compressing the pixels, the bandwidth used for transmission of the analog video signal can be reduced.

8 is a flowchart of an analog video signal compression method according to another example.

In step 810, the communication unit 210 receives an analog video signal. For example, the communication unit 210 may receive an analog video signal from the camera. As another example, the communication unit 210 may receive an analog video signal and the processor 220 may convert the digital video signal to an analog video signal.

At step 820, the processor 220 determines the type of horizontal line to process. The processor 220 may determine whether the horizontal line is a vertical blank line or an active horizontal line.

At step 830, the processor 220 determines the format of the horizontal line. If the format of the horizontal line is an active horizontal line, steps 310 to 340 described above with reference to FIG. 3 may be performed. If the format of the horizontal line is not an active horizontal line, step 840 may be performed.

Step 835 may be performed after step 340 is performed.

At step 835, the processor 220 displays the compression method of compressing the horizontal line on the horizontal line. The compression method may be related to what compression ratio is applied to which of the plurality of intervals. Information on the compression method can be shared between the compression device 110 and the decryption device 120. [

In step 840, the processor 220 compresses the horizontal line to a predetermined compression rate if the horizontal line is not an active horizontal line.

At step 850, the processor 220 changes the horizontal line to be processed. For example, if the nth horizontal line is processed in steps 820 through 840, the processor 220 may change the horizontal line to be processed to the (n + 1) th horizontal line. For the (n + 1) th horizontal line, steps 820 through 840 may be performed again. After processing for all horizontal lines, step 860 may be performed.

At step 860, the processor 220 generates a compressed analog video signal based on the compressed intervals. The processor 220 may generate compressed analog video signals using compressed horizontal lines.

In step 870, the communication unit 210 transmits the compressed analog video signal. For example, the communication unit 210 may transmit a compressed analog video signal to the decoding apparatus 120 using a coaxial cable.

FIG. 9 illustrates bursts of signals that are phase adjusted in accordance with a compression method according to an example.

According to one aspect, the processor 220 may indicate the compression method on the horizontal blank of the horizontal line. For example, a compression method may be indicated in a burst of horizontal blanks. The compression method can be displayed by adjusting the phase of the signal of the burst according to the compression method.

The reference phase and data phase may be indicated in the burst signal. The reference phase can be set the same for all compression methods. The processor 220 may indicate the compression method by adjusting the data phase. Depending on the compression method, the offset of the beginning of the data phase may be different. For example, the first compression method 910 may have the same data phase as the reference phase. As another example, preset offsets may be set such that the second compression method 920 and the third compression method 930 are displayed, respectively.

FIG. 10 shows the signals of the frequency-adjusted burst according to the compression method according to an example

As another example, the processor 220 may adjust the frequency of the signal of the burst to indicate the compression method.

The reference frequency and the data frequency may appear in the signal of the burst. The reference frequency may be set the same for all compression methods. The processor 220 may indicate the compression method by adjusting the data frequency. Depending on the compression method, the data frequencies may be different. For example, the fourth compression method 1010 may have a data frequency equal to a reference frequency. As another example, a preset data frequency may be set so that the fifth compression method 1020 and the sixth compression method 1030 are displayed, respectively.

Figure 11 shows the signals of a burst of length adjusted according to the compression method according to an example

As another example, the processor 220 may adjust the length of the burst's signal so that the compression method is displayed.

The processor 220 may indicate the compression method by adjusting the data length. Depending on the compression method, the data length may be different. For example, the seventh compression method 1110 may have a data length equal to a reference length. As another example, preset data lengths may be set so that the eighth compression method 1120 and the ninth compression method 1130 are displayed, respectively

12 shows a method of indicating a compression method in a horizontal sync according to an example.

The processor 220 may display the compression method on the horizontal sync 1212 of the horizontal blank of the compressed horizontal line 1210. [ For example, the processor 220 may indicate the compression method by adjusting the size of the horizontal sync 1210.

13 and 14 illustrate a method of indicating a compression method in a front burst interval according to an example.

The processor 220 may indicate the compression method to the front burst interval 1313 or 1413 of the horizontal blank of the compressed horizontal line 1310 or 1410. [ For example, the processor 220 can display the compression method by making the size of the front burst interval 1313 larger than the existing value. As another example, the processor 220 may display the compression method by making the size of the front burst interval 1413 smaller than the existing value.

FIG. 15 illustrates a method of indicating a compression method in a back burst interval according to an example.

The processor 220 may indicate the compression method in the back burst interval 1515 of the horizontal blank of the compressed horizontal line 1510. [ For example, the processor 220 may display the compression method by making the size of the back burst interval 1515 larger than the existing value. As another example, the processor 220 may indicate the compression method by making the size of the back burst interval 1515 smaller than the existing value.

16 is a flowchart of an analog video signal compression method using a previous horizontal line according to an example.

The following steps 1610 and 1620 may be performed before step 310 described above in FIG. 3 is performed.

At step 1610, the processor 220 may compare the horizontal line with the previous horizontal line. The number of previous horizontal lines may be plural. For example, if the current horizontal line to be processed is the nth, then the (n-1) th, (n-2) th and (n-3) th previous horizontal lines may be compared to the current horizontal line. The number of previous horizontal lines to be compared may vary depending on the processing capabilities of the compression device 110.

At step 1620, the processor 220 may display on the horizontal line the portion of the horizontal line that references the previous horizontal line, based on the comparison result. For example, if the first section of the current horizontal line is the same as the first section of the previous horizontal line, the processor 220 determines that the data for the first section of the current horizontal line is the first section of the previous horizontal line Can be displayed on the current horizontal line for reference. The first interval of step 1620 may be different from the intervals divided in step 310. [

If the current horizontal line refers to a previous horizontal line, the amount of data to be included in the current horizontal line may decrease.

If a portion of the horizontal line refers to a previous horizontal line, then at step 310, the processor 220 may divide the area of the horizontal line that does not reference the previous horizontal line into a predetermined number of intervals. If some of the horizontal lines refer to a previous horizontal line, the compression rate of the area of the remaining horizontal lines may be lowered. When the compression rate is lowered, data lost by compression can be reduced.

If some area of the horizontal line refers to a previous horizontal line, the description of steps 320 to 340 may be a description of the area of the remaining horizontal lines above.

17 is a flowchart of an analog video signal compression method using a previous frame according to an example.

The following steps 1710 and 1720 can be performed before step 310, described above in FIG. 3, is performed.

At step 1710, the processor 220 may compare the frame to be processed with the previous frame. The number of previous frames may be plural. For example, if the current frame to be processed is the n-th, then the n-1, n-2, and n-3 th previous frames may be compared to the current frame. The number of previous frames to be compared may vary depending on the processing capabilities of the compression device 110.

Frame-by-frame comparison can be understood as an enlargement of comparison in horizontal line units. If the performance of the compression device 110 is good, the comparison may be performed frame by frame.

At step 1720, the processor 220 may display in the frame the portion of the frame that references the previous frame, based on the comparison result. For example, the processor 220 may display a portion of the first horizontal line of the frame that references the previous frame. The above embodiment is for the purpose of explanation, and the displayed portion is not limited to a specific frame.

If the current frame refers to a previous frame, the amount of data to be included in the current frame may be reduced. For example, extra data may be allocated for a portion that does not refer to a previous frame. As another example, extra data may be used for the next frame.

If the current frame refers to a previous frame, step 310 may be performed on a horizontal line that does not reference the previous frame. For example, the step 310 may be a step of dividing the area of the horizontal line of the current frame, which does not refer to the previous frame, into a predetermined number of intervals.

18 is a configuration diagram of an analog video signal decoding apparatus according to an embodiment.

The decryption apparatus 120 includes a communication unit 1810, a processor 1820, and a storage unit 1830.

The communication unit 1810 is connected to an external device and is capable of transmitting and receiving data. For example, the communication unit 1810 can receive a compressed analog video signal from the compression device 110. [

The processor 1820 can process the data received by the communication unit 1810 and the data stored in the storage unit 1830.

The storage unit 1830 may store data received by the communication unit 1810 and data processed by the processor 1820. [

The communication unit 1810, the processor 1820, and the storage unit 1830 will be described in detail below with reference to FIGS. 19 and 20. FIG.

19 is a flowchart of an analog video signal decoding method according to an embodiment.

In step 1910, the communication unit 1810 can receive the compressed analog video signal from the compression device 110. [ For example, the communication unit 1810 can receive a compressed analog video signal using a coaxial cable.

In step 1920, the processor 1820 may detect the compression method displayed within the horizontal line of the compressed analog video signal.

According to one aspect, the processor 1820 may detect the compression method indicated in the horizontal blank of the horizontal line. The compression method can be indicated in the burst of the horizontal blank. For example, the processor 1820 may detect the compression method indicated by adjusting the phase of the signal of the burst according to the compression method. As another example, the processor 1820 may detect the compression method indicated by adjusting the frequency of the signal of the burst in accordance with the compression method.

According to another aspect, the processor 1820 may detect the compression method indicated in the horizontal sync of the horizontal blank.

The method of detecting the compression method can correspond to the method of displaying the compression method described with reference to Figs. 9 to 14, and thus a detailed description thereof will be omitted.

In step 1930, the processor 220 may decode the compressed horizontal line based on the detected compression method. The processor 220 may generate a decoded analog video signal based on the decoded horizontal line.

20 is a flowchart of a method for decoding a horizontal line according to an example.

Step 1930, described above in FIG. 19, may include the following steps 2010 and 2020.

At step 2010, the processor 220 may divide the active area of the compressed horizontal line into a predetermined number of intervals.

In step 2020, the processor 220 may decode each of the intervals based on the detected compression method. The detected compression method may represent the compression ratio of each of the sections. The processor 220 may decode the horizontal line using a decoding method corresponding to the compression method.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

100: Analog video signal transmission / reception system
110: Analog image compression device
120: Analog video decoding device

Claims (29)

Dividing a horizontal line of the analog video signal into a predetermined number of intervals;
Calculating image complexity of each of the intervals;
Classifying the intervals into a plurality of groups based on the image complexity;
Compressing each of the intervals according to the classified group; And
Generating a compressed analog video signal based on the compressed intervals
Lt; / RTI >
Dividing the horizontal line into a predetermined number of intervals,
Dividing an active region of the horizontal line into the predetermined number of intervals
/ RTI >
A method for compressing an analog video signal.
delete The method according to claim 1,
Dividing the horizontal line into a predetermined number of intervals,
Compressing the horizontal blank of the horizontal line to a preset compression ratio
≪ / RTI >
A method for compressing an analog video signal.
The method according to claim 1,
Displaying the compression method by compressing the intervals on the horizontal line
≪ / RTI >
A method for compressing an analog video signal.
5. The method of claim 4,
Wherein the compressing method compresses the intervals on the horizontal line,
And displaying the compression method on a horizontal blank of the horizontal line,
A method for compressing an analog video signal.
6. The method of claim 5,
Wherein the compression method comprises the steps of:
A method for compressing an analog video signal.
The method according to claim 6,
Wherein the compression method is displayed by adjusting the phase of the signal of the burst according to the compression method,
A method for compressing an analog video signal.
The method according to claim 6,
The frequency of the signal of the burst being adjusted according to the compression method,
A method for compressing an analog video signal.
The method according to claim 6,
Wherein a length of a signal of the burst is adjusted according to the compression method,
A method for compressing an analog video signal.
6. The method of claim 5,
Said compression method comprising the steps of: displaying a horizontal sync of the horizontal blank,
A method for compressing an analog video signal.
The method according to claim 1,
Determining a format of the horizontal line
Further comprising:
Dividing the horizontal line into a predetermined number of intervals,
Wherein the horizontal line is an active horizontal line,
A method for compressing an analog video signal.
12. The method of claim 11,
If the format of the horizontal line is not an active horizontal line, compressing the horizontal line to a predetermined compression rate
≪ / RTI >
A method for compressing an analog video signal.
The method according to claim 1,
Wherein the compressing comprises:
Down-scaling the pixels of the interval with the compression rate set in the group
/ RTI >
A method for compressing an analog video signal.
The method according to claim 1,
Transmitting the compressed analog video signal using a coaxial cable
≪ / RTI >
A method for compressing an analog video signal.
The method according to claim 1,
Wherein the analog image signal is a signal of an ultra high definition (UHD) image or a signal of an 8K UHD image,
A method for compressing an analog video signal.
The method according to claim 1,
Comparing the horizontal line with a previous horizontal line; And
Displaying an area on the horizontal line that refers to the previous horizontal line among the areas of the horizontal line based on the comparison result
Further comprising:
Dividing the horizontal line into a predetermined number of intervals,
Dividing an area of the horizontal line that does not refer to the previous horizontal line into a predetermined number of intervals,
A method for compressing an analog video signal.
The method according to claim 1,
Comparing the current frame with a previous frame; And
Displaying a portion of the current frame that refers to the previous frame on the frame based on the comparison result
Further comprising:
Dividing the horizontal line into a predetermined number of intervals,
Dividing an area of a horizontal line of the current frame not referring to the previous frame into a predetermined number of intervals,
A method for compressing an analog video signal.
A communication unit for receiving an analog video signal; And
Dividing a horizontal line of the analog video signal into a predetermined number of intervals, calculating image complexity of each of the intervals, classifying the intervals into a plurality of groups based on the image complexity, A processor for compressing the intervals according to the groups and generating compressed analog video signals based on the compressed intervals,
Lt; / RTI >
Wherein the processor divides an active region of the horizontal line into the predetermined number of intervals,
An analog video signal compression device.
Receiving an analog video signal;
Detecting a compression method displayed in a horizontal line of the analog video signal; And
Decoding the horizontal line based on the compression method
Lt; / RTI >
Wherein the decoding of the horizontal line based on the compression method comprises:
Dividing an active region of the horizontal line into a predetermined number of intervals; And
Decrypting each of the intervals based on the compression method
/ RTI >
A method for decoding an analog video signal.
20. The method of claim 19,
Wherein the decoding of the horizontal line based on the compression method comprises:
And decoding the horizontal line using a decoding method corresponding to the compression method
Further included,
A method for decoding an analog video signal.
delete 20. The method of claim 19,
Wherein the detecting the compression method comprises:
Detecting the compression method displayed on a horizontal blank of the horizontal line
≪ / RTI >
A method for decoding an analog video signal.
23. The method of claim 22,
Wherein the compression method comprises the steps of:
A method for decoding an analog video signal.
24. The method of claim 23,
Wherein the detecting the compression method comprises:
Detecting the compression method indicated by adjusting the phase of the signal of the burst according to the compression method,
A method for decoding an analog video signal.
24. The method of claim 23,
Wherein the detecting the compression method comprises:
Detecting the compression method indicated by adjusting the frequency of the signal of the burst according to the compression method,
A method for decoding an analog video signal.
24. The method of claim 23,
Wherein the detecting the compression method comprises:
Detecting a compression method indicated by adjusting a length of a signal of the burst according to the compression method,
A method for decoding an analog video signal.
23. The method of claim 22,
Wherein the compression method comprises the steps of:
A method for decoding an analog video signal.
20. The method of claim 19,
Wherein the step of receiving the analog video signal comprises:
A method of receiving an analog video signal using a coaxial cable,
A method for decoding an analog video signal.
A communication unit for receiving an analog video signal; And
A processor for detecting a compression method displayed in a horizontal line of the analog video signal and decoding the horizontal line based on the compression method,
Lt; / RTI >
Wherein the processor divides an active region of the horizontal line into a predetermined number of intervals and decodes each of the intervals based on the compression method,
An apparatus for decoding an analog video signal.

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