TWI228003B - System and method for 2D Y/C adaptive separation - Google Patents

Abstract

2D Y(luminance)/C(chrominance) adaptive separation includes a 1-D Y/C separation and a 2-D Y/C separation. 1-D Y/C separation and 2-D Y/C separation is used for separating the luminance and chrominance from the lines with horizontal correlation and vertical correlation separately. For critical vertical color transition, luminance is the primary concerned and chrominance is the secondary concerned for the judgment in the present invention. With another special judgment for gray level pictures, the interference of hanging dots can be eliminated.

Description

1228003 V. Description of the invention (1) 1. [Technical field to which the invention belongs] The present invention relates to a method and a device for separating brightness and chroma. #% I Two-dimensional brightness and chroma for solving the problem of hanging dots > _ Method and device. 2. [Previous technology] The separated video signal (composite video signal) is a signal summed up by (luminance) and chrominance (chrominance). In video technology, it is represented by Y signal and C signal. . The C signal is another two types of intermediate signals (modulated combination of I and Q). These two types of intermediary signals are generated by the three primary colors (red, green, and blue) of the video system. Λ TV signals are modulated (m o d u 1 a t e) and separated video signals on RF (Radio Frequency) carrier signals, which can be transmitted over the air or on cable system. Separated video signals and narrow-band sound signals can be easily separated because the two do not overlap in the frequency spectrum. In order to have more channels for TV signal transmission, it is necessary to reduce the bandwidth of the separated video signal, and design the frequency range of brightness (Y) and chroma (0 signal to overlap. Because of the brightness and chroma The problem with overlapping is that they can't be completely separated. The designers of the early US NTSC television standards also knew about this problem, but compared to the additional channels, this is a good choice.

1228003 ------- V. Description of the invention (2) ^ Brightness and chroma are overlapped in a staggered manner. The Y and C signal energy clusters of brightness and chroma are only known for their level. The 8¾ frequency is staggered like the teeth of two combs, as shown in the first a. On some moving images or patterns, these clusters will become wider. 'In some cases, brightness and chroma will become difficult to separate, but' On most video images, this kind of brightness cluster The ways of interlacing with chroma clusters all work well. The most basic brightness and chroma separation technology uses simple analog filters to separate the brightness and chroma + of the video signal. The shell signal is derived from the brightness of the separated video signal with a low-frequency filter (10wpassfi 11 er, 〇r notch fi Iter). This is feasible because the frequency band (freqUenCy band) of chroma is concentrated at about 3 · 58MHz, as shown in the first figure B. Therefore, the brightness low-frequency filter is excluded from frequencies above 2.5Mhz, and most of the brightness signals can be obtained. However, this f effectively excludes most of the The chroma signal is also removed. The bandwidth loss (the i0ss bandwidth) of the car driver ’s frequency-free signal reduces the horizontal brightness resolution, and the finer details on the screen are also lost. If the shirt is not completely filtered, it will cause the interference of the brightness signal. In the example of ☆, the bright spot (checkerboard-like) on the color point (patcheS "Ιορ) will be generated.

1228003 _______—_ _ 5. Description of the invention (3) Brightness pattern), so that the lack of chroma can not be completely removed from the brightness. It is generally called cross-luminance, which will cause stagnation along the border of the person or the edge of the object. (Stationary) or crawling dot patterns are called hanging dots or dot crack 1. Similarly, chroma is obtained by filtering out frequencies other than 3.0 MHz to 4.2 MHz, and unfortunately there will still be luminance signals in this range that cannot be removed. This can cause unwanted color patterns in the details of the day (

Color patterns) or rainbows become tricky when these similar lines of concealment exist. Such color interference is called cross-color. Such a bandpass filtering technique also reduces the bandwidth of the chroma signal. The original chroma bandwidth can reach 2 · 1 MHz. Although the naked eye is less sensitive to chroma details than brightness. , But still limits the presentation of picture quality. An improved method is the separation of one-dimensional brightness and chroma, (1 ^ h comb filter Λ / sweep t line delay (1-a ... can Une del: y) to: interlaced processing of two chroma in 1 field The positive value of the front brightness plus the positive value of the chroma, the front line delay below the second = the positive value of i plus the negative value of the chroma. Therefore, adding a scan of the cat's line of sight can add twice the brightness. Value and vice versa

The seventh sage 1228003 V. Description of the invention (4) Subtracting the two scanning lines to take the absolute value can get twice the chroma value. The advantage of this method is that the quality of the day is obviously better, and the effect of cross color is dynamically reduced. However, after all, it is the result of comparing the different scanning lines in the vertical color change, that is, when the Different scan lines have different colors at the same horizontal position, so the chroma cannot be completely filtered out. Due to the relationship of cross-color, the situation of cross-brightness will also be caused, so there will be dangling points. . The method of separating two-dimensional brightness and chroma by comparing three consecutive scanning lines can greatly reduce the above-mentioned hanging point, because the color change in the vertical direction is in most cases, the upper two scanning lines or the lower two The scan lines will be similar. If the three scan lines are significantly different, the overhangs will still not be resolved, but in terms of performance cost and improvement, it is a very good choice. Although the two-dimensional brightness and chroma separation method can effectively improve the problem of overhanging points, on the grayscale or black other daytime surfaces, due to the relationship of mixed colors, the original black-and-white daytime surfaces have colored points, so it is necessary to A method and system for two-dimensional adaptive brightness and chroma separation to specifically process color and black and white images. 3. Summary of the Invention One of the main objectives of the present invention is to provide a method and system for two-dimensional adaptive brightness and chroma separation. Another main object of the present invention is to improve the hanging dots.

Page 8 1228003 V. Description of the Invention (5) Problem. Another main object of the present invention is to identify black and white images to avoid the problem of mixed colors. Therefore, the present invention proposes a two-dimensional adaptive brightness and chroma separation method. First, three scanning lines of a field are received, which are a first scanning line, a second scanning line, and a third scanning line in order. Then, a detection value set is generated, and the detection value set is generated according to these scan lines. Next, a detection decision is generated, and the detection decision is generated based on the detection value set. Next, a chroma and a brightness are separated, and the chroma and the brightness are generated according to the detection decision. The invention also proposes a two-dimensional adaptive brightness and chroma separation system, including: a first scanning line delay device To output a first scan line, the first scan line is input from a second scan line delay device and is output after being delayed by a time unit; a second scan line delay device is used to output a The second scan line, which is output from a scan line input terminal after being delayed by a time unit; a scan line input terminal is used to input a third scan line, the first scan line, The second scanning line and the third scanning line are three consecutive scanning lines in the same field. A detection device generates a detection value set based on the three scanning lines, and generates a detection value set based on the detection value set. A detection decision; a two-dimensional chroma generating device, which generates one-line one-two chroma and one-line two-three chroma according to these three age-sweeping lines; a dimensional chroma generating device, which is based on the second scan

Page 9 1228003

In the content of the book disclosed in the present invention, "this word is considered to include = several, & any of the mentioned plural should also be properly smoked. Ϊ: a? Adaptable brightness and chroma separation method The second picture is a schematic diagram of a preferred embodiment. As shown in step 210, receiving the Γ scans and lines of ::: are the-scan line and the second scan, respectively. : Scan line I. Then, as shown in step 22, a detection value set 4 is generated. The measurement set is generated based on these scan lines. Next, a detection decision is generated as described in step 2. The detection decision is made based on the detection value set. As shown in step 240, a chroma and a brightness are separated, and the chroma and the brightness are generated according to the detection decision. Contains line one high frequency value, line two three high frequency value, line low frequency value, line two three low frequency value, line three one low frequency value, line one two difference value Γ one two difference. The above high frequency The value and the low-frequency value are respectively a band pass; a bandpass filter and a low-pass filter (low pass f 1 1) respectively separate the low-frequency signal and the high-frequency signal. Generated by signal filtering. Detection

The method of generating set 0 includes: generating line one or two high-frequency values. The method of generating line one or two frequency values includes adding the first scanning line and the second scanning line, passing the high, considering the wave and taking the absolute value. Generated by the value; generating line two or three high frequency values, the method of generating line two one = frequency value includes adding the second scanning line and the third scanning line, generating by inter-frequency filtering and taking the absolute value; generating the line One-two difference. The method of generating one-to-one difference of this line includes the second scan line minus the first scan line and the absolute value.

1228003 V. Description of the invention (9) 'Use the second scan line and the third scan line to solve the chroma, that is, the output line two or three chroma 338 (2D2 3), otherwise, use the first scan line and the second scan line. Sight the line to find the chroma, that is, the output line has a chroma of 3 37 (2D1 2). If the condition of decision 331 is not true, as shown in decision 332, when abs [LPF (Ll-L2)] < T, & 乜 3 [1 ^? (乙 2-13)] > 1 'and 3乜 3 [1 ^? ([1-1 ^ 2)] < 1 'holds, the similarity between the brightness of the first scan line and the second scan line is greater than the brightness of the second scan line and the third scan line The similarity is high, and the chroma at this time is solved by the first scanning line and the second scanning line. If the condition of decision 3 3 2 is not satisfied, as shown in decision 3 3 3, when abs [LPF (Ll-L2)] > T, abs [LPF (L2-L3)] < T and abs [LPF ( Ll

-L 2)] < When T is established, the similarity of the brightness of the first scanning line and the second scanning line is lower than the similarity of the brightness of the second scanning line and the third scanning line, and the chroma at this time Use the second scan line and the third scan line to solve. If the condition of decision 3 3 3 is not true, as shown in decision 33 4, when 358 [1 ^ 卩 (11-12)] < 1 [, 3dagger 5 [1 ^? (1243)] < 1 [ And 31 ^ [1 ^? (1 ^ -12)] &1; 1 [When it is true, at this time, as shown in decision 334 1, abs [BPF (Ll + L2)] < T, it represents the first scan The similarity between the brightness of the sight line and the second scan line is very high, and the resolution at this time is solved by the first scan line and the Kanichichime line. The condition of right decision 3 3 4 1 does not hold, as shown in decision 3 3 42. If 363 [6 ?? (乙 2 + 1 ^ 3)] < 1 ', it represents the second scanning line and the third The similarity of the brightness of the Satoshi line is very high, and the resolution at this time is solved by the second scanning line and the third scanning line. If the conditions of decision 3 3 4 2 do not hold, as shown in decision 3343, if abs [BPF (Ll + L2)]> T and abs [BPF (L2 + L3)]> T represent the first scan line The second scan line and the third scan line are not similar in chroma, but the mode at this time should be the high-frequency vertical line of the black and white mode. Today, it is against abs [(Ll-L2)] < abs [( L2-L3)] 'represents the first scan of the black and white mode

Page 13 l228〇03 V. Description of the invention (10) The brightness similarity between the ^ line and the second scanning line is higher than the brightness similarity between the second scanning line and the third scanning line, and the chroma at this time Solve with the first scan line and the second scan line, and conversely, solve with the second scan line and the third scan line. If the condition of decision 334 is not true, as shown in decision 3 3 5, when abs [LPF (Ll -L2)] < T, abs [LPF (L2-L3)] > T and abs [LPF (L 卜L2)] > When T is established, the similarity between the brightness of the first scanning line and the second scanning line may be very high. At this time, as shown in decision 3 3 5 1, it represents the first scanning in the black and white mode. The brightness of the line is similar to that of the second scanning line. At this time, the chroma is solved by the first scanning line and the second scanning line. Otherwise, the second scanning line is separated by one-dimensional brightness and chroma. The solution, that is, after the second scanning line is subjected to high-frequency filtering, takes its absolute value, that is, the second scanning line chroma 3 3 9 (1 D) is output. If the condition of decision 335 is + is not true, as shown in decision 3 3 6, when abs [LPF (Ll-L2)] > T, abs [LPF (L2-L3)] < T and abs [LPF (L Bu L2)] > When T is established, the similarity between the brightness of the second scanning line and the third scanning line may be very high. At this time, as shown in decision 3 3 6 1, it represents the second in black and white mode. The brightness of the scan line is similar to the brightness of the third scan line. The chroma at this time is solved by the second scan line and the third scan line. Otherwise, the second scan line uses one-dimensional brightness and chroma. Separate the solution, that is, output the second scan line chroma 3 3 9. Finally, if it is not in the above range, it is solved by using the second scanning line to separate one-dimensional brightness and chroma. In summary, this detection decision is the occurrence of the output line's chroma. 0 includes: when the line 1-2 low frequency value, the line 2-3 low frequency value and the line 1-3 low frequency value are less than a threshold, and the line One or two high frequency quality is less than the line two or three high frequency value; when the line one or two low frequency value and the line one or three low frequency value is less than the threshold

Page 14 1228003 V. Description of the invention (11), but the low frequency value of the line two or three is greater than the threshold value; when the low frequency value of the line two or three and the low frequency value of the line is less than the threshold value, but the low frequency value of the line is one to three Value is greater than the threshold value, and the line one or two wide frequency values are less than the threshold value; when the line one or two low frequency values and the line two or three low frequency values are less than the threshold value, but the line one or three low frequency values are greater than the threshold value, and The difference between the line 1 and 2 is smaller than the difference between the line 2 and 3; when the line 2 or 3 low frequency value is less than the threshold value, but when the line 2 or 3 low frequency value and the line 1 3 low frequency value are greater than the threshold value, and the line 1 2 The difference is less than this threshold. The detection decision is a line low frequency value of the line, a threshold value of the line, and the line when the line low frequency value of the line is large, the line low frequency value is greater than the line low frequency value, and the line low frequency value is smaller than the threshold. The low-frequency value of the line is greater than the threshold value, and the line measurement decision is to output the occurrence of the second sweep of the chroma value. Line and the low frequency south frequency threshold; however, the difference between the threshold and the saturation level of the second line includes three low frequency lines, two three two, and three low frequency values, the line one is smaller than the one, but the line is one line, one line, and three low frequency values. Greater than the threshold value; when the line is one value, but when the line two or three is lower than the threshold value. The occurrence of this situation does not include the occurrence of trichroma. The values include the south frequency value and the low frequency value of the gate, which are included in the less than value; and the frequency value of the second limit value of the line is less than the above detection line. When the detection and decision-making system outputs one or two chroma lines, the chroma is one or two chroma lines, and the one or two chroma lines are half the difference between the second scanning line and the first scanning line. When the detection decision system outputs two or three chroma, the chroma is two or three.

Page 15 1228003

The difference between the two and three chroma 4 5 4 and the line 佶 ^ ^ ^ Redundancy 455, the same day, one-dimensional chroma generation device 46 line 沭 绿 green / Yi? The urinary brother moved the U corpse / T to return to his brother and knew the chroma 4 6 2. In addition, the difference between the chroma of the second scanning line and the second scanning line or the second scanning line is filtered by low frequency to generate a second scanning line brightness 46 3. Finally, the chroma and brightness output device 47 outputs the chroma 472 and chroma 474 described in the previous preferred embodiment according to the detection decision 442. '' Other details of this two-dimensional adaptive brightness and chroma separation system are the same as those of the previous embodiment, and will not be repeated here. The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of patent application of the present invention; all other equivalent changes or modifications made without departing from the spirit disclosed by the present invention shall be included in the following The scope of this patent application. θ

1228003 Simple illustration of the diagram. V. [Simplified illustration of the diagram] The advantages and benefits of the present invention over the previous art are that it will be easier to see after comparison with the specific embodiments with reference to the following diagrams, where: The first A picture and the first B Figures are schematic diagrams of the prior art description; Figures 2 and 3A to 3B are not intended to be a preferred embodiment of the present invention, and Figures 4 to 3 are schematic diagrams of another preferred embodiment of the present invention. Symbols 331 decision 331 3311 decision 3311 332 decision 332 333 decision 333 334 decision 334 334 1 decision 3341 3342 decision 3342 3343 decision 3343 335 decision 335 3351 decision 335 1 336 decision 336 336 1 decision 336 1

Page 181228003 Schematic description of 3 3 7 output line one or two chroma 3 3 8 output line two or three chroma 3 3 9 output second scan line chroma 41 first scan line delay device 4 1 2 first Scan line

4 2 Second scan line delay device 4 2 2 Second scan line 4 3 Scan line input 4 3 2 Third scan line 44 Detection device 45 Two-dimensional chroma generation device 4 5 2 Line one two color Degree 4 5 3 Line 1 2 Brightness 4 5 4 Line 2 3 Brightness 4 5 5 Line 2 3 Brightness 46 —Dimensional Saturation Generator 4 6 2 Second Scan Line Saturation 463 Second Scan Line Brightness 47 Saturation And brightness output device

T9

Claims (1)

1228003 6. Scope of patent application 1. A two-dimensional adaptive brightness and chroma separation method, including: receiving three scanning lines of a field, which are sequentially the first scanning line, the second scanning line, and the third Scanning line; generating a detection value set, which is generated based on the scanning lines; generating a detection decision, which is determined based on the detection value set; and separating a chroma And a brightness, the chroma and the brightness are generated according to the detected drab. 2. For example, the two-dimensional adaptive brightness and chroma separation method of item 1 of the scope of patent application, wherein the above-mentioned detection value set includes one line one two high frequency values, one line two three high frequency values, one line one two low frequency values , One line two three low frequency value, one line three one low frequency value, one line one two difference and one line two three difference. 3. For example, the two-dimensional adaptive brightness and chroma separation method of item 2 of the scope of patent application, wherein the method of generating the above-mentioned detection value set includes: The generating method includes adding the first scanning line and the second scanning line, and generating the high-frequency filtering and taking an absolute value; ❿ generating two or three high-frequency values of the line, and generating methods of the two or three high-frequency values of the line; Including the addition of the second scanning line and the third scanning line, generated by high-frequency filtering and taking an absolute value; generating a difference of one or two of the line, and a method of generating the difference of one or two of the line including the Page 20 1228003 VI. Patent application scope The second scanning line is generated by subtracting the first scanning line and taking the absolute value; generating the line one or two low frequency values, and the method of generating the line one or two low frequency values includes the first The second scan line is subtracted from the first scan line, and is generated by low-frequency filtering and taking an absolute value. The line two-three difference value is generated. The method of generating the line two or three low-frequency values includes the third scan line minus the The second scanning line is generated by taking the absolute value; generating the second low frequency value of the line, and the method of generating the second low frequency value of the line includes subtracting the second scanning line from the third scanning line, filtering and obtaining the low frequency The absolute value is generated; and the low-frequency value generation method includes low-frequency filtering and taking the absolute generation of the line and three low-frequency values. The line includes the third scan line minus the first scan line value. 4. For the two-dimensional adaptive brightness and chroma separation method in item 2 of the scope of patent application, the above detection decision is one of the following groups: output one line one two chroma, output one line two three chroma and output one Second scan line chroma. 5. For the two-dimensional adaptive brightness and chroma separation method of item 4 in the scope of patent application, the above detection decision is to output one or two chroma of the line, and the detection decision is to output one or two chroma of the line. Including: When the line has one or two low frequency values, the line has two or three low frequency values and the line has one or three low frequency values are less than a threshold value, and the line has one or two high frequency qualities less than the line two or three high frequency values; The two low frequency values and the line one and three low frequency values are less than the threshold. Page 21 1228006 6. The scope of patent application but the low frequency value of the line two or three is greater than the threshold value; when the low frequency value of the line two or three and the low frequency value of the line is less than the threshold value, but the low frequency value of the line one or three is greater than the threshold value Value, and the line one or two wide frequency value is less than the threshold value; when the line one or two low frequency value and the line two or three low frequency value are less than the threshold value, but the line one or three low frequency value is greater than the threshold value, and the line one or two The difference is less than the line two or three difference; when the line one or two low frequency value is less than the threshold, but when the line two or three low frequency value or the line one or three low frequency value is greater than the threshold value, and the line one or two difference is less than the threshold Threshold. 〇. According to the two-dimensional adaptive brightness and chroma separation method in item 4 of the scope of the patent application, the above-mentioned detection decision is to output the two-thirds chroma of the line. The generation of the two-thirds chroma of the line includes: When the line One or two low frequency values, two or three low frequency values of the line, and one or three low frequency values of the line are all less than a threshold value, and the quality of the one or two high frequencies of the line is not less than the two or three south frequency values of the line. When the line one or two low frequency values are greater than The threshold value, but the line two or three low frequency value and the line one or three low frequency value are greater than the threshold value; when the line one or two low frequency value or the line two or three low frequency value is less than the threshold value, Φ but the line one or three low frequency value Greater than the threshold value, and the line two or three wide frequency value is less than the threshold value; when the line one or two low frequency value and the line one or three low frequency value are greater than the threshold value, but when the line two or three low frequency value is less than the threshold value, and the Line one or two difference is less than Page 22 1228003 6. Scope of patent application The threshold. 7. For the two-dimensional adaptive brightness and chroma separation method of item 4 in the scope of patent application, wherein the detection decision is to output the chroma of the second scan line, and the occurrence of the chroma of the second scan line is not Included in the situation where the line has one or two chroma generations and the line's two or three chroma cases. 8. For the two-dimensional adaptive brightness and chroma separation method in item 4 of the scope of patent application, where the detection decision is to output one or two chroma of the line, the chroma is one or two chroma of the line, and the line one Two chroma is half the difference between the second scan line and the first scan line, and the brightness is the difference between the second scan line and the chroma. 9. If the two-dimensional adaptive brightness and chroma separation method of item 4 of the patent application range, wherein the detection decision is to output two or three chroma of the line, the chroma is two or three chroma of the line, or two The three chroma is half the difference between the third scan line and the second scan line, and the brightness is the difference between the second scan line and the chroma. 10. For the two-dimensional adaptive brightness and chroma separation method according to item 4 of the scope of patent application, wherein the detection decision is outputting the chroma of the second scan line, the chroma is the chroma of the second scan line The chroma of the second scan line is generated after the second scan line is filtered by high frequency, and the brightness is the difference between the second scan line and the chroma. Page 23 1228003 6. Application for patent scope 11. A two-dimensional adaptive brightness and chroma separation system, comprising: a first scan line delay device for outputting a first scan line, the first scan line A second scan line delay device is input after being delayed by a time unit after being input. The second scan line delay device is used to output a second scan line. The second scan line is output from a scan line. The input end is delayed after the time unit is input and output; the scan line input end is used to input the third scan line, the first scan line, the second scan line, and the third scan line. Three consecutive cat scan lines of the same field; a detection device generates a set of detection values based on the first scan line, the second scan line, and the third scan line, and according to the detection The set of measured values generates a detection decision; a two-dimensional chroma generating device generates one-line one-two chroma, one-line one-two brightness according to the first scan line, the second scan line, and the third scan line , One-line two-three chroma and one-line two-three brilliance; According to the second scan line to generate a second scan line and a second scan luminance saturation; saturation and a luminance output means outputs a color system and a luminance degree based on the detection decision. 12. The two-dimensional adaptive brightness and chroma separation system according to item 11 of the scope of patent application, wherein the above detection value set includes one line, two high frequency values, and one line Page 24 1228003 6. Scope of patent application One or two south frequency values, one line one or two low frequency values, one line two or three low frequency values, one line three or one low frequency values, one line one or two differences, and one line two or three differences. 13. The two-dimensional adaptive brightness and chroma separation system according to item 12 of the scope of patent application, wherein the method for generating the above-mentioned detection value set includes: generating one or two high-frequency values of the line and one or two high-frequency values of the line The generating method includes adding the first scanning line and the second scanning line, generating the high-frequency filtering and taking an absolute value; generating the second-third high-frequency value of the line, and generating the second-third high-frequency value of the line. Including the addition of the second scanning line and the third scanning line, generated by high-frequency filtering and taking an absolute value; generating a difference of one or two of the lines, and a method of generating the difference of one or two of the lines including the second scanning It is generated by subtracting the first scanning line and taking an absolute value from the Miao line; generating a low frequency value of the line, and a method of generating the low frequency value of the line, including the second scanning line minus the first scanning line. Line, after low-frequency filtering and taking the absolute value; generating two or three difference values of the line, the method of generating two or three low-frequency values of the line includes the third scanning line minus the second scanning line and taking the absolute value Generate; generate the low frequency values of the second and third lines of the 5 Hai line; Including the far third scan line minus the second scan line, generated by low-frequency filtering and taking an absolute value; and generating a three line low frequency value, the method of generating one line three low frequency values includes the second scan The aiming line is generated by subtracting the first scanning line, filtering by a low frequency, and taking an absolute value. Page 25 1228003 6. Scope of patent application 14. For example, the two-dimensional adaptive brightness and chroma separation system of item 12 of the patent application scope, wherein the detection decision is one of the following groups: output one or two chroma of the line , Output the two-three chroma of the line and one output the chroma of the second scan line. 15. For example, the two-dimensional adaptive brightness and chroma separation system in item 14 of the scope of patent application, in which the above-mentioned detection decision is to output one or two chroma of the line. The generation of one or two chroma of the line includes: When the line The one or two low frequency values, the two or three low frequency values of the line, and the one or three low frequency values of the line are all less than a threshold value, and the line one or two high frequency quality is less than the line two or three high frequency values; when the line one or two low frequency values and The low frequency value of the line one or three is less than the threshold value, but the low frequency value of the line two or three is greater than the threshold value; when the low frequency value of the line two or three and the low frequency value of the line is less than the threshold value, but the low frequency value of the line one or three is greater than The threshold value, and the wideband value of the line is less than the threshold value; when the low frequency value of the line and the low frequency value of the line are smaller than the threshold value, but the low frequency value of the line is greater than the threshold value, and the line The one-two difference is less than the line two-three difference; when the line one-two low-frequency value is less than the threshold, but when the line two-three low-frequency value and the line one-three low-frequency value are greater than the threshold, and the line one-two difference Less than this threshold. 16. Separate two-dimensional adaptive brightness and chroma as in the scope of application for patent No. 14 Page 26 1228003 6. The patent application system, in which the above-mentioned detection and decision-making system outputs the second and third chroma of the line. The generation of the second and third chroma of the line includes: when the line has one or two low frequency values, the line has two or three low frequency values. The low-frequency value of the line is less than a threshold value, and the high-frequency quality of the line is not less than the high-frequency value of the line. When the low-frequency value of the line is greater than the threshold value, the low-frequency value of the line is two or three. The low-frequency value of the line is three or more than the threshold value; when the low-frequency value of the line is two or three and the low-frequency value of the line is less than the threshold value, but the low-frequency value of the line is one or three, and the wide-value value of the line is two or three. Less than the threshold value; when the line one or two low frequency values and the line one or three low frequency values are greater than the threshold value, but when the line two or three low frequency values are less than the threshold value, and the line one or two difference values are less than the threshold value. 17. For example, the two-dimensional adaptive brightness and chroma separation system of item 14 in the scope of patent application, wherein the detection decision is to output the chroma of the second scan line, and the chroma of the second scan line is generated as follows: It does not include the occurrence of one or two chroma of the line and the occurrence of two or three chroma of the line. 18. If the two-dimensional adaptive brightness and chroma separation system of item 14 of the scope of patent application, wherein the above-mentioned detection decision is to output one or two chroma of the line, the chroma and the brightness are respectively one or two of the line. The chroma and the line are one or two, the line one or two is the half of the difference between the second scan line and the first scan line, and the line one or two is the second scan line and The difference in chroma. Page 27 1228003 6. Application for patent scope 19. For example, the two-dimensional adaptive brightness and chroma separation system for item 14 of the scope of application for patent, where the above-mentioned detection decision is to output two or three chroma of the line, the chroma and The party degree is the two-second degree of the line and the two-third degree of the line. The two-third degree of the line is half of the difference between the third scan line and the second scan line, and the line The two or three brightness is the difference between the second scan line and the chroma. 20. For example, the two-dimensional adaptive brightness and chroma separation system for item No. 14 of the scope of patent application, wherein when the detection decision is to output the chroma of the second scanning line, the chroma and the brightness are respectively the first and the second. The second scan line chroma and the second scan line brightness, the second scan line chroma is generated after the second scan line is filtered by high frequency, and the second scan line brightness is the second The difference between the scan line and the chroma. Page 28