JPS6243989A - Video adaptive scanning line interpolating device - Google Patents
Video adaptive scanning line interpolating deviceInfo
- Publication number
- JPS6243989A JPS6243989A JP60184443A JP18444385A JPS6243989A JP S6243989 A JPS6243989 A JP S6243989A JP 60184443 A JP60184443 A JP 60184443A JP 18444385 A JP18444385 A JP 18444385A JP S6243989 A JPS6243989 A JP S6243989A
- Authority
- JP
- Japan
- Prior art keywords
- correlation
- scanning line
- circuit
- weighting
- scanning lines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Television Systems (AREA)
Abstract
Description
【発明の詳細な説明】
発明の目的
産業上の利用分野
本発明は、テレビジョン映像信号の走査線を補間して画
質の改善を図る走査線補間装置に関し、特に画面の状態
に適応して補間信号の合成方法を変化させる映像適応型
走査線補間装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scanning line interpolation device that interpolates scanning lines of a television video signal to improve image quality, and in particular to a scanning line interpolation device that interpolates scanning lines of a television video signal to improve image quality. The present invention relates to a video adaptive scanning line interpolation device that changes a signal synthesis method.
従来の技術
テレビジョン映像信号の走査線を補間して画質の改善を
図る走査線補間装置が知られている。2. Description of the Related Art A scanning line interpolation device is known that interpolates scanning lines of a television video signal to improve image quality.
この走査線補間装置の一つとして、第6図(A)に示す
ように、原映像信号入力端子1.原映像信号出力端子2
及び補間映像信号出力端子3を備え、原映像信号と同一
の信号を補間映像信号として出力する、いわゆる2度書
きの装置がある。As one of the scanning line interpolation devices, as shown in FIG. 6(A), an original video signal input terminal 1. Original video signal output terminal 2
There is a so-called double writing device which is equipped with an interpolated video signal output terminal 3 and outputs the same signal as the original video signal as an interpolated video signal.
他の走査線補間装置として、同図(B)に示すように、
原映像信号入力端子1.原映像信号出力端子2.補間映
像信号出力端子3.原映像信号を1 (水平)走査線分
遅延させる1走査線遅延回路4、加算回路5及び1/2
係数器6を備え、隣接走査線間の相加平均値を補間映像
信号として出力するものがある。As another scanning line interpolation device, as shown in the same figure (B),
Original video signal input terminal 1. Original video signal output terminal 2. Interpolated video signal output terminal 3. 1 scanning line delay circuit 4 that delays the original video signal by 1 (horizontal) scanning line, addition circuit 5 and 1/2
Some devices include a coefficient unit 6 and output an arithmetic average value between adjacent scanning lines as an interpolated video signal.
更に他の走査線補間装置として、原映像信号入力端子l
、原映像信号出力端子2.補間映像信号出力端子3及び
原映像(8号を1フイ一ルド分遅延させるlフィールド
遅延回路7を備え、フィールド間の相関を利用して1フ
イールド前の映像信号を補間映像信号として出力するも
のがある。Furthermore, as another scanning line interpolation device, the original video signal input terminal l
, original video signal output terminal 2. It is equipped with an interpolation video signal output terminal 3 and an l field delay circuit 7 that delays the original video (No. 8 by one field), and outputs the video signal one field before as an interpolation video signal by using the correlation between fields. There is.
発明が解決しようとする問題点
」−記2度書きによる走査線補間装置においては、第7
図(A)に例示するように画面内に斜め線が出現する場
合には、同図(B)に示すように、捕間後の画面内に階
段状の線分が表示され、線分の滑らかさが損なわれてし
まうという問題がある。"Problems to be Solved by the Invention" - In the scanning line interpolation device written twice, the seventh
When a diagonal line appears on the screen as shown in Figure (A), a stair-like line segment is displayed on the screen after interpolation, as shown in Figure (B), and the line segment is There is a problem that smoothness is lost.
また、隣接走査線間の相加平均値を補間映像信号とする
走査線補間装置では、同図(C)に示すように、垂直方
向への輪郭がぼけてしまうという問題がある。Furthermore, in a scanning line interpolation device that uses an arithmetic average value between adjacent scanning lines as an interpolated video signal, there is a problem in that the contour in the vertical direction becomes blurred, as shown in FIG.
また、1フイールド前の映像信号を補間映像信号とする
装置では、高価な大容量のフィールド・メモリを必要と
するだけでなく、画面の動きが大きくフィールド間の相
関が小さい場合には画質がかえって劣化してしまうとい
う問題もある。Furthermore, devices that use the video signal from one field before as an interpolated video signal not only require an expensive, large-capacity field memory, but also suffer from poor image quality when the screen moves large and the correlation between fields is small. There is also the problem of deterioration.
発明の構成
問題点を解決するための手段
上記従来技術の問題点を解決する本発明の走査線補間装
置は、隣接走査線−ヒで垂直方向に隣接する原映像信号
から制御可能な重み付け補間信号を作成する合成回路と
、隣接走査線上で垂直方向及び斜め方向に隣接する原映
像信号の相関の度合を検出する相関検出回路と、この相
関検出回路で検出される相関の度合が大きいほど上記合
成回路の重み付けを均等化する方向に制御する重み付け
制御回路とを備えている゛。Structure of the Invention Means for Solving the Problems The scanning line interpolation device of the present invention solves the problems of the prior art as described above. a correlation detection circuit that detects the degree of correlation between original video signals adjacent in the vertical and diagonal directions on adjacent scanning lines, and the higher the degree of correlation detected by this correlation detection circuit, the more and a weighting control circuit that controls the weighting of the circuits in a direction that equalizes the weighting of the circuits.
本箱2の発明に係わる走査線補間装置は、隣接走査線−
トで垂直方向及び斜め方向に隣接する原映像信号から制
御可能な重み付け補間信号を作成する合成回路と、隣接
走査線上で垂直方向及び斜め方向に隣接する原映像信号
の相関の度合を検出する相関検出回路とを備えている。The scanning line interpolation device according to the invention in Bookcase 2 has the following features:
A synthesis circuit that creates a controllable weighted interpolation signal from vertically and diagonally adjacent original video signals on an adjacent scanning line, and a correlation that detects the degree of correlation between vertically and diagonally adjacent original video signals on adjacent scanning lines. and a detection circuit.
更に、この走査線補間装置は、上記相関検出回路で検出
される垂直方向の相関の度合が大きいほど−h記合成回
路の垂直方向の重み付けを斜め方向よりも大きくかつ隣
接走査線間で均等化する方向に制御し、上記相関検出回
路で検出される斜め方向の相関の度合が大きいほど上記
合成回路の斜め方向の重み付けを垂直方向よりも大きく
かつ隣接走査線間で均等化する方向に制御する重み付け
制御回路とを備えている。Furthermore, as the degree of vertical correlation detected by the correlation detection circuit increases, the scanning line interpolation device weights the vertical direction of the synthesis circuit to be greater than that in the diagonal direction and equalizes the weighting between adjacent scanning lines. As the degree of correlation in the diagonal direction detected by the correlation detection circuit increases, the weighting in the diagonal direction of the synthesis circuit is controlled to be greater than that in the vertical direction and equalized between adjacent scanning lines. and a weighting control circuit.
以下、本発明の作用を実施例と共に詳細に説明する。Hereinafter, the operation of the present invention will be explained in detail together with examples.
実施例
第1図は、本発明の一実施例の走査線補間装置の構成を
示す構成ブロック図である。Embodiment FIG. 1 is a block diagram showing the configuration of a scanning line interpolation device according to an embodiment of the present invention.
この走査線補間装置は、原映像信号入力端子1と、原映
像信号出力端子2と、補間映像信号出力端子3とを備え
ている。This scanning line interpolation device includes an original video signal input terminal 1, an original video signal output terminal 2, and an interpolated video signal output terminal 3.
また、この走査線補間装置は、映像信号を1 (水平)
走査線分遅延させる1走査線遅延回路10と、映像信号
を1画素分遅延させる1画素遅延回路21,22.23
及び24と、減算器3】、32及び33とを備えている
。In addition, this scanning line interpolation device converts the video signal into 1 (horizontal)
A one-scan line delay circuit 10 that delays the video signal by one pixel, and one-pixel delay circuits 21, 22, and 23 that delay the video signal by one pixel.
and 24, and subtractors 3], 32, and 33.
更に、この走査線補間装置は、絶対値回路41゜42及
び43と、最小値選択回路44と、係数発生器45と、
係数器46.47と加算器48から成る合成回路とを備
えている。Furthermore, this scanning line interpolation device includes absolute value circuits 41, 42 and 43, a minimum value selection circuit 44, a coefficient generator 45,
It is provided with a synthesis circuit consisting of coefficient multipliers 46 and 47 and an adder 48.
入力端子1に供給される原映像信号は、1走査線遅延回
路IOで1走査線分の時間だけ遅延され、後続の走査線
112がこの1走査線遅延回路IOに供給され始めると
同時に先行の走査綿H1としてここから出力される。こ
の先行の走査1!H1は、1画素遅延回路23と24に
おいて更に1画素分の時間ずつ遅延され、減算器33の
一方の入力端子に供給される。The original video signal supplied to the input terminal 1 is delayed by the time of one scanning line in the one scanning line delay circuit IO, and at the same time the subsequent scanning line 112 starts to be supplied to this one scanning line delay circuit IO, the original video signal is delayed by one scanning line delay circuit IO. It is output from here as scanning cotton H1. This advance scan 1! H1 is further delayed by one pixel in the one-pixel delay circuits 23 and 24, and is supplied to one input terminal of the subtracter 33.
この走査線補間装置をディジタル形式で実現する場合に
は、1走査線遅延回路10や1画素遅延回路23.24
等はRAM等で構成され、映像信号の書込み終了後1走
査線分あるいは1画素分の時間をおいて読出しが開始さ
れる。When realizing this scanning line interpolation device in a digital format, one scanning line delay circuit 10 and one pixel delay circuit 23, 24 are used.
etc. are constituted by a RAM or the like, and readout is started after a time period of one scanning line or one pixel has elapsed after the writing of the video signal is completed.
一方、入力端子1に供給される原映像信号は、後続の走
査線H2として1画素遅延回路21と22において1画
素分の時間ずつ遅延され、減算器32の一方の入力端子
に供給される。減算器32の他方の入力端子には、1走
査線遅延回路10から出力された先行の走査線Hlが供
給される。また、減算器33の他方の入力端子には、後
続の走査線H1が供給される。更に、減算器31の両人
内端子には、それぞれ1画素遅延回路21と23の出力
が供給される。On the other hand, the original video signal supplied to the input terminal 1 is delayed by one pixel time in the one pixel delay circuits 21 and 22 as the subsequent scanning line H2, and is supplied to one input terminal of the subtracter 32. The other input terminal of the subtracter 32 is supplied with the previous scanning line Hl output from the one-scanning line delay circuit 10. Further, the subsequent scanning line H1 is supplied to the other input terminal of the subtracter 33. Furthermore, the outputs of the one-pixel delay circuits 21 and 23 are supplied to both terminals of the subtracter 31, respectively.
第2図は、第1図の動作を説明するための概念図であり
、同図中、Hl、H2は原映像信号中の隣接走査線、■
はこれら隣接走査線上の原映像信号から合成される補間
走査線である。また、a。FIG. 2 is a conceptual diagram for explaining the operation of FIG. 1. In the figure, H1 and H2 are adjacent scanning lines in the original video signal,
is an interpolated scanning line synthesized from original video signals on these adjacent scanning lines. Also, a.
b及びCは先行の走査線Hl上の隣接画素、d。b and C are adjacent pixels on the previous scanning line H1; d;
e及びfは後続の走査線H2上の隣接画素、lは補間走
査線I−Fの補間画素である。上記第2図中の走査線H
1,H2及び画素a % fは、第1図中同一参照符号
が付された箇所の映像信号に対応している。e and f are adjacent pixels on the subsequent scanning line H2, and l is an interpolated pixel on the interpolated scanning line IF. Scanning line H in Figure 2 above
1, H2, and pixel a%f correspond to the video signals at the locations with the same reference numerals in FIG.
減算器31からは、先行の走査線■1上の映像信号すと
後続の走査線H2上の映像信号eの差分出力b−eが、
隣接走査線間の垂直方向差分信号として出力される。ま
た、減算器32からは、先行の走査線Hl上の映像信号
Cと後続の走査線H2上の映像信号dの差分出力c−d
が、隣接走査線間の斜め方向差分信号として出力される
。更に、減算器33からは、先行の走査線Hlトの映像
体号aと後続の走査線H2−Lの映像信号fの差分出力
a−rが、隣接走査線間の斜め方向差分信号として出力
される。From the subtracter 31, a difference output b-e between the video signal on the preceding scanning line 1 and the video signal e on the subsequent scanning line H2 is obtained.
It is output as a vertical difference signal between adjacent scanning lines. Further, from the subtracter 32, a difference output c-d between the video signal C on the preceding scanning line Hl and the video signal d on the succeeding scanning line H2 is output.
is output as a diagonal difference signal between adjacent scanning lines. Further, the subtracter 33 outputs a difference output a-r between the video signal number a of the preceding scanning line Hl and the video signal f of the succeeding scanning line H2-L as a diagonal direction difference signal between adjacent scanning lines. be done.
減算器3I〜33の差分出力は、対応の絶対値回路41
〜43において絶対値がとられ、差分出力の絶対値1c
mdi、1b−el、1a−flとして最小値選択回路
44に供給される。−に記各絶対稙は、隣接走査線間の
斜め方向と垂直方向の相関の度合を表示し、対応の絶対
値が小さければ小さいほど斜め方向又は垂直方向の相関
の度合が大きいことを表示する。The difference outputs of the subtracters 3I to 33 are sent to the corresponding absolute value circuit 41.
The absolute value is taken at ~43, and the absolute value of the difference output is 1c
The signals are supplied to the minimum value selection circuit 44 as mdi, 1b-el, and 1a-fl. - Each absolute value indicated in the box indicates the degree of correlation between adjacent scanning lines in the diagonal direction and the vertical direction, and the smaller the corresponding absolute value, the greater the degree of correlation in the diagonal direction or the vertical direction. .
最小値選択回路44は、この走査線補間装置をディジタ
ル形式で実現する場合には減算器と論理ゲートとの組合
せ回路で構成され、絶対値回路41〜43から供給され
た3個の差分出力の絶対値のうち最小のもの、すなわち
隣接走査線間の相関の最大のものを選択して係数発生器
45に供給する。When implementing this scanning line interpolation device in a digital format, the minimum value selection circuit 44 is composed of a combination circuit of a subtracter and a logic gate, and selects the three differential outputs supplied from the absolute value circuits 41 to 43. The smallest absolute value, ie, the one with the largest correlation between adjacent scanning lines, is selected and supplied to the coefficient generator 45.
係数発生器45は、この走査線補間装置をディジタル形
式で実現する場合には最小値のアドレスに対応の係数を
格納するROMなどで構成され、最小値選択回路44か
ら供給された最小値に応じた大きさの係数kを係数器4
6.47と加算器48から構成される合成回路に供給す
る。When realizing this scanning line interpolation device in a digital format, the coefficient generator 45 is composed of a ROM or the like that stores the corresponding coefficient at the address of the minimum value, and generates a coefficient according to the minimum value supplied from the minimum value selection circuit 44. The coefficient k of the magnitude
6.47 and an adder 48.
係数器46は、後続の走査線H2上の映像信号eをに倍
した信号を加算器48の一方の入力端子に供給する。ま
た、係数器47は、先行の走査線Hl上の映像信号すを
(1−k)倍した信号を加算器48の他方の入力端子に
供給する。The coefficient multiplier 46 supplies a signal obtained by multiplying the video signal e on the subsequent scanning line H2 to one input terminal of the adder 48. Further, the coefficient multiplier 47 supplies a signal obtained by multiplying the video signal S on the previous scanning line Hl by (1-k) to the other input terminal of the adder 48.
係数発生器45に供給される最小値と、係数発生器45
から出力される係数にとの関係は、第3図に例示するよ
うに、最小値が0の時、すなわち斜め方向又は垂直方向
の相関が100%の時にはに=0.5 である。係数
には、最小値の増加(隣接走査線間の相関の弱まり)と
共に1に接近し、最小値がある程度大きな範囲(隣接走
査線間の相関がない範囲)では1になる。The minimum value supplied to the coefficient generator 45 and the coefficient generator 45
As illustrated in FIG. 3, the relationship between the coefficients output from and the coefficients is 0.5 when the minimum value is 0, that is, when the correlation in the diagonal direction or the vertical direction is 100%. The coefficient approaches 1 as the minimum value increases (correlation between adjacent scanning lines weakens), and becomes 1 in a range where the minimum value is large to some extent (range where there is no correlation between adjacent scanning lines).
従って、斜め又は垂直方向の相関が100%の場合には
、先行の走査線Hl上の映像信号すと、後続の走査線H
2上の映像信号1(2上の映像信号eとが均等に重み付
けされることにより合成された補間映像信号iが補間信
号出力端子3から出力される。Therefore, if the correlation in the diagonal or vertical direction is 100%, the video signal on the preceding scanning line H1 will be
An interpolated video signal i is outputted from an interpolation signal output terminal 3 by equally weighting the video signal 1 on 2 (and the video signal e on 2).
また、斜め方向又は垂直方向の相関が小さくなるにつれ
て後続の走査線H2上の映像信号eの比重が増加してゆ
く。更に、隣接走査線間の相関がほとんど存在しなくな
るとに=1となり、後続の走査線H2−トの映像信号e
のみが補間出力端子に供給され、いわゆる2度書きによ
る走査線補間が行われ、垂直輪郭のぼけが回避される。Further, as the correlation in the diagonal direction or the vertical direction becomes smaller, the specific weight of the video signal e on the subsequent scanning line H2 increases. Furthermore, when there is almost no correlation between adjacent scanning lines, the value becomes 1, and the video signal e of the subsequent scanning line H2-
Only the scan line is supplied to the interpolation output terminal, and scanning line interpolation by so-called double writing is performed to avoid blurring of the vertical contour.
係数器46と47の入れ換えにより、隣接走査線間の相
関がほとんど存在しなくなった場合に、先行の走査線上
Hl上の映像信号すによって2度書きするようにしても
よい。When there is almost no correlation between adjacent scanning lines by exchanging the coefficient units 46 and 47, it may be possible to write twice using the video signal on H1 on the previous scanning line.
第4図は、本箱2の発明の一実施例の走査線補間V装置
の構成を示す構成ブロック図である。FIG. 4 is a block diagram showing the configuration of a scanning line interpolation V device according to an embodiment of the invention in Bookcase 2.
第4図中、第2図と同一の参照符号を付した構成要素は
第2図に関して既に説明した構成要素と同一のものであ
るから、これらについては重複した説明を省略する。Components in FIG. 4 denoted by the same reference numerals as those in FIG. 2 are the same as the components already described in connection with FIG.
第4図の走査線補間装置では、第2図の装置にスイッチ
51.52が付加されると共に、最小(1^選択回路4
4には、選択した最小値に応じてスイッチ51.52の
切り替えを制御する機能が付加されている。In the scanning line interpolation device shown in FIG. 4, switches 51 and 52 are added to the device shown in FIG.
4 has an added function of controlling switching of the switches 51 and 52 according to the selected minimum value.
すなわち、最小(直選択回路44は、絶対値回路41か
ら出力される垂直方向の差分信号の絶対値Ib−elを
最小値として選択したときには、スイッチ51と52を
図中の中段の位置に切り替えて、映像信号eとbをそれ
ぞれ係数器46と47に供給すると共に、映像信号eと
bの相関の度合に応じた係数kを各係数器46と47に
供給する。That is, when the minimum direct selection circuit 44 selects the absolute value Ib-el of the vertical difference signal output from the absolute value circuit 41 as the minimum value, it switches the switches 51 and 52 to the middle position in the figure. The video signals e and b are supplied to coefficient multipliers 46 and 47, respectively, and a coefficient k corresponding to the degree of correlation between video signals e and b is supplied to each coefficient multiplier 46 and 47.
この係数発生器45における最小値と係数にの関係は、
第3図のものとほぼ同様であり、最小値が0の極限では
均等の重み付けが行われ、最小値の増加につれて漸次一
方への重み付けが行われる。The relationship between the minimum value and the coefficient in this coefficient generator 45 is as follows:
This is almost the same as that in FIG. 3, and in the limit where the minimum value is 0, equal weighting is performed, and as the minimum value increases, weighting is gradually applied to one side.
従って、第5図(A)に例示するように、画面内に垂直
の線分が出現する場合には、同図の点線で示すように、
この垂直線分上に存在する映像信号すとeの均等合成に
よる補間信号iが補間信号出力端子3から出力される。Therefore, as illustrated in FIG. 5(A), when a vertical line segment appears in the screen, as shown by the dotted line in the same figure,
An interpolated signal i is outputted from an interpolated signal output terminal 3 by uniformly combining the video signals S and e existing on this vertical line segment.
また、最小値選択回路44は、絶対値回路42から出力
される斜め方向の差分信号の絶対値1cmdlを最小値
として選択したときには、スイッチ51と52を図中の
上段の位置に切り替えて、映像信号dとCをそれぞれ係
数器46と47に供給すると共に、映像信号dとCの相
関の度合に応じた係数kを各係数器46と47に供給す
る。従って、第5図(B)に例示するように、画面内に
左下がりの斜め線が出現したときには、同図の点線で示
すように、この斜め線上に存在する映像信号dとCの合
成による補間信号iが補間信号出力端子3から出力され
る。Further, when the minimum value selection circuit 44 selects the absolute value 1 cmdl of the diagonal difference signal outputted from the absolute value circuit 42 as the minimum value, it switches the switches 51 and 52 to the upper position in the figure to Signals d and C are supplied to coefficient multipliers 46 and 47, respectively, and a coefficient k corresponding to the degree of correlation between video signals d and C is supplied to each coefficient multiplier 46 and 47. Therefore, when a diagonal line slanting downward to the left appears on the screen, as illustrated in FIG. Interpolation signal i is output from interpolation signal output terminal 3.
更に、最小値選択回路44は、絶対値回路43から出力
される斜め方向の差分信号の絶対値1a−flを最小値
として選択したときには、スイッチ51と52を図中の
下段の位置に切り替えて、映像信号fとaをそれぞれ係
数器46と47に供給すると共に、映像信号aとfの相
関の度合に応じた係数kを各係数器46と47に供給す
る。従って、第5図(C)に例示するように、画面内に
右下がりの斜め線が出現したときには、同図の点線で示
すように、この斜め線上に存在する映像信号aとfの合
成による補間信号iが補間信号出力端子3から出力され
る。Further, when the minimum value selection circuit 44 selects the absolute value 1a-fl of the diagonal difference signal outputted from the absolute value circuit 43 as the minimum value, the minimum value selection circuit 44 switches the switches 51 and 52 to the lower position in the figure. , video signals f and a are supplied to coefficient multipliers 46 and 47, respectively, and a coefficient k corresponding to the degree of correlation between video signals a and f is supplied to each coefficient multiplier 46 and 47. Therefore, when a diagonal line slanting downward to the right appears on the screen, as illustrated in FIG. Interpolation signal i is output from interpolation signal output terminal 3.
第5図から明らかなように、画面内に出現する線分の種
類、すなわち映像信号に応じて、滑らかな斜め線や垂直
線分が表示される。As is clear from FIG. 5, smooth diagonal lines and vertical line segments are displayed depending on the type of line segment appearing on the screen, that is, the video signal.
なお、いずれの最小値が選択される場合でも、その値が
ある程度以上大きい場合、すなわち斜め又は垂直方向の
相関がある程度率さい場合には、係数回路46の出力d
、e又はfがそのまま補間信号iとして補間信号出力端
子3から出力されるいわゆる2度書きの状態となり、垂
直輪郭のぼけが有効に回避される。Incidentally, no matter which minimum value is selected, if the value is larger than a certain degree, that is, if the correlation in the diagonal or vertical direction is high to a certain extent, the output d of the coefficient circuit 46
.
第2図の場合と同様に、係数器46と47を入れ換える
ことにより、後続の走査線H2−トの映像信号を2度書
きすることに代えて先行の走査線111上の映像信号を
2度書きするように構成してもよい。As in the case of FIG. 2, by exchanging the coefficient units 46 and 47, the video signal on the preceding scanning line 111 is written twice instead of writing the video signal on the subsequent scanning line H2-to twice. It may be configured to write.
なお、第4図の走査線補間装置において、スイッチ51
と52に代えて垂直方向と斜め方向の映像信号に対する
連続可変重み付け回路を設置し、相関の大きな方向に大
きな重み付けを行う構成とすることもできる。Note that in the scanning line interpolation device shown in FIG.
It is also possible to install a continuously variable weighting circuit for video signals in the vertical direction and diagonal direction in place of .
発明の効果
以上詳細に説明したように、本発明の走査線補間装置は
、隣接走査線上で垂直方向と斜め方向に隣接する原映像
信号の相関の度合を検出し、相関の度合が大きいほど合
成回路の重み付けを均等化したり、相関の大きな方向に
大きな重み付けを行いつつ隣接走査線間で重み付けを均
等化する方向に制御することにより画面の状況に適応し
た走査線の補間を行う構成であるから、従来の装置のよ
うに斜め線の滑らかさが損なわれたり、垂直輪郭がぼけ
たり、あるいはフィールド間相関の欠如に伴って画質が
かえって劣化したりするという問題を全て有効に解決で
きるという効果が奏される。Effects of the Invention As explained in detail above, the scanning line interpolation device of the present invention detects the degree of correlation between original video signals that are adjacent to each other in the vertical and diagonal directions on adjacent scanning lines, and the greater the degree of correlation, the higher the degree of synthesis. This is because it is configured to perform scanning line interpolation that adapts to the screen situation by equalizing the weighting of the circuit, or by controlling the weighting to be equalized between adjacent scanning lines while giving greater weighting in the direction of greater correlation. The effect of this method is that it can effectively solve all of the problems that occur with conventional devices, such as loss of smoothness of diagonal lines, blurring of vertical contours, and deterioration of image quality due to lack of correlation between fields. It is played.
第1図は本発明の一実施例の構成ブロック図。
第2図と第3図は本発明の詳細な説明するだめの概念図
、第4図は本箱2の発明の一実施例の構成ブロック図、
第5図は第4図の走査線補間装置の作用を説明する概念
図、第6図は従来の走査線補間装置の構成ブロック図、
第7図は第6図の従来装置の問題点を説明するための概
念図である。
1・・原映像信号入力端子、2・・原映像信号出力端子
、3・・補間信号出力端子、10・・l走査線遅延回路
、21〜24・・1画素遅延回路、31〜33・・減算
器141〜43・・絶対値回路、45・・係数発生回路
、46.47・・係数器、48・・加算器、51.52
・・スイッチ。FIG. 1 is a block diagram of an embodiment of the present invention. FIGS. 2 and 3 are conceptual diagrams that do not provide detailed explanations of the present invention, and FIG. 4 is a block diagram of the configuration of an embodiment of the invention in the bookcase 2.
FIG. 5 is a conceptual diagram explaining the operation of the scanning line interpolation device shown in FIG. 4, and FIG. 6 is a block diagram of the configuration of a conventional scanning line interpolation device.
FIG. 7 is a conceptual diagram for explaining the problems of the conventional device shown in FIG. 1.. Original video signal input terminal, 2.. Original video signal output terminal, 3.. Interpolation signal output terminal, 10.. l scanning line delay circuit, 21-24.. 1 pixel delay circuit, 31-33.. Subtractors 141-43...absolute value circuit, 45...coefficient generation circuit, 46.47...coefficient unit, 48...adder, 51.52
··switch.
Claims (2)
ら制御可能な重み付け補間信号を作成する合成回路と、 隣接走査線上で垂直方向及び斜め方向に隣接する原映像
信号の相関の度合を検出する相関検出回路と、 この相関検出回路で検出される相関の度合が大きいほど
前記合成回路の重み付けを均等化する方向に前記重み付
けを制御する重み付け制御回路とを備えたことを特徴と
する映像適応型走査線補間装置。(1) A synthesis circuit that creates a controllable weighted interpolation signal from vertically adjacent original video signals on adjacent scanning lines, and detects the degree of correlation between vertically and diagonally adjacent original video signals on adjacent scanning lines. and a weighting control circuit that controls the weighting in a direction that equalizes the weighting of the combining circuit as the degree of correlation detected by the correlation detection circuit increases. type scan line interpolator.
原映像信号から制御可能な重み付け補間信号を作成する
合成回路と、 隣接走査線上で垂直方向及び斜め方向に隣接する原映像
信号の相関の度合を検出する相関検出回路と、 この相関検出回路で検出される垂直方向の相関の度合が
大きいほど前記合成回路の垂直方向の重み付けを斜め方
向よりも大きくかつ隣接走査線間で均等化する方向に前
記重み付けを制御し、前記相関検出回路で検出される斜
め方向の相関の度合が大きいほど前記合成回路の斜め方
向の重み付けを垂直方向よりも大きくかつ隣接走査線間
で均等化する方向に前記重み付けを制御する重み付け制
御回路とを備えたことを特徴とする映像適応型走査線補
間装置。(2) A synthesis circuit that creates a controllable weighted interpolation signal from vertically and diagonally adjacent original video signals on adjacent scanning lines, and a correlation between vertically and diagonally adjacent original video signals on adjacent scanning lines. a correlation detection circuit that detects the degree of correlation in the vertical direction, and a direction in which the higher the degree of correlation in the vertical direction detected by the correlation detection circuit, the greater the weighting in the vertical direction of the synthesis circuit than in the diagonal direction and equalization between adjacent scanning lines; The weighting is controlled in a direction such that the greater the degree of correlation in the diagonal direction detected by the correlation detection circuit, the more the weighting in the diagonal direction by the combining circuit is made larger than in the vertical direction and equalized between adjacent scanning lines. A video adaptive scanning line interpolation device comprising: a weighting control circuit that controls weighting.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60184443A JPS6243989A (en) | 1985-08-22 | 1985-08-22 | Video adaptive scanning line interpolating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60184443A JPS6243989A (en) | 1985-08-22 | 1985-08-22 | Video adaptive scanning line interpolating device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6243989A true JPS6243989A (en) | 1987-02-25 |
JPH0342832B2 JPH0342832B2 (en) | 1991-06-28 |
Family
ID=16153235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60184443A Granted JPS6243989A (en) | 1985-08-22 | 1985-08-22 | Video adaptive scanning line interpolating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6243989A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6477383A (en) * | 1987-09-18 | 1989-03-23 | Toshiba Corp | Sequential scanning converter |
JPS6477385A (en) * | 1987-09-18 | 1989-03-23 | Toshiba Corp | Sequential scan converting circuit |
JPS6477384A (en) * | 1987-09-18 | 1989-03-23 | Toshiba Corp | Sequential scanning converter |
US5032899A (en) * | 1988-07-22 | 1991-07-16 | Kabushiki Kaisha Toshiba | Interpolation signal generating circuit for progressive scanning conversion system television receiver |
US6995775B2 (en) | 2002-10-31 | 2006-02-07 | Sony Corporation | Image processing apparatus and method, recording medium, and program thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776979A (en) * | 1980-10-30 | 1982-05-14 | Hitachi Ltd | Signal processing circuit for television receiver |
-
1985
- 1985-08-22 JP JP60184443A patent/JPS6243989A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5776979A (en) * | 1980-10-30 | 1982-05-14 | Hitachi Ltd | Signal processing circuit for television receiver |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6477383A (en) * | 1987-09-18 | 1989-03-23 | Toshiba Corp | Sequential scanning converter |
JPS6477385A (en) * | 1987-09-18 | 1989-03-23 | Toshiba Corp | Sequential scan converting circuit |
JPS6477384A (en) * | 1987-09-18 | 1989-03-23 | Toshiba Corp | Sequential scanning converter |
US5032899A (en) * | 1988-07-22 | 1991-07-16 | Kabushiki Kaisha Toshiba | Interpolation signal generating circuit for progressive scanning conversion system television receiver |
US6995775B2 (en) | 2002-10-31 | 2006-02-07 | Sony Corporation | Image processing apparatus and method, recording medium, and program thereof |
US6999099B2 (en) | 2002-10-31 | 2006-02-14 | Sony Corporation | Image processing apparatus and method, recording medium, and program thereof |
US7009623B2 (en) | 2002-10-31 | 2006-03-07 | Sony Corporation | Image processing apparatus and method, recording medium, and program thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH0342832B2 (en) | 1991-06-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2605013B2 (en) | Motion adaptive video signal processing circuit | |
JPH0548666B2 (en) | ||
JP3365333B2 (en) | Resolution converter | |
CN101521785A (en) | Video signal processing apparatus and method | |
EP0703704B1 (en) | Half-pixel motion compensation controller accepting MPEG2 | |
JPS6243989A (en) | Video adaptive scanning line interpolating device | |
US6259480B1 (en) | Sequential scanning converter | |
JP3898546B2 (en) | Image scanning conversion method and apparatus | |
JP2650896B2 (en) | Motion adaptive signal processing circuit | |
KR20040028683A (en) | Video signal processor and video signal processing method | |
JP4439603B2 (en) | Television receiver | |
JPH0479509B2 (en) | ||
JP3314963B2 (en) | Scan conversion device for image signal | |
JP2007019708A (en) | Image processing apparatus | |
JP2510699B2 (en) | Contour compensator for progressive scanning television signal | |
JP2557500B2 (en) | Progressive scan conversion device for television signals | |
JPH06339124A (en) | Motion detector | |
JP3242164B2 (en) | Scanning line number converter for image signals | |
JP2600884B2 (en) | Television receiver | |
JP3292233B2 (en) | Interpolation processing circuit | |
JP3158781B2 (en) | Noise reduction device | |
KR920007917B1 (en) | Progressive scanning circuit | |
JPH0733499Y2 (en) | High definition television decoder | |
JP2001292387A (en) | Image processing, apparatus, its method and recording medium | |
JPH09116912A (en) | Video signal processor |