JPH03190473A - Video signal processor - Google Patents
Video signal processorInfo
- Publication number
- JPH03190473A JPH03190473A JP1330679A JP33067989A JPH03190473A JP H03190473 A JPH03190473 A JP H03190473A JP 1330679 A JP1330679 A JP 1330679A JP 33067989 A JP33067989 A JP 33067989A JP H03190473 A JPH03190473 A JP H03190473A
- Authority
- JP
- Japan
- Prior art keywords
- scanning line
- video signal
- line interpolation
- circuit
- signal
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims description 34
- 230000002708 enhancing effect Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009978 visual deterioration Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
- Studio Circuits (AREA)
- Television Systems (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はビデオ信号処理装置に関し、特に、輪郭強調回
路を備えたものに適用して好適なものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a video signal processing device, and is particularly suitable for application to a device equipped with an edge enhancement circuit.
［従来の技術］
いわゆるＥＤＴＶやＩＤＴＶ等の高画質化テレビジョン
受像機の中には、走査線補間回路を備えてビデオ信号の
走査線数を例えば倍増させてノンインターレースさせる
ように処理するものがある。[Prior Art] Some high-definition television receivers, such as so-called EDTV and IDTV, are equipped with a scanning line interpolation circuit that doubles the number of scanning lines of a video signal to make it non-interlaced. be.
一般に、走査線補間方式としては、フィールド相関を利
用して１フイールド前の走査線を補間走査線とする３次
元走査線補間方式と、ライン相関を利用して、同一走査
線を重ねて出力して、又は上下走査線を平均処理して補
間走査線を形成する２次元走査線補間方式とがある。最
近のテレビジョン受像機では、外部からの選択操作に応
じて、又は、自動かつ適応的に、これらの補間方式を選
択できるようになされている。In general, scanning line interpolation methods include a three-dimensional scanning line interpolation method that uses field correlation to use the previous scanning line as the interpolated scanning line, and a three-dimensional scanning line interpolation method that uses line correlation to output the same scanning line overlappingly. There is also a two-dimensional scanning line interpolation method in which an interpolated scanning line is formed by averaging upper and lower scanning lines. In recent television receivers, these interpolation methods can be selected in response to an external selection operation or automatically and adaptively.
自動かつ適応的に選択させるテレビジョン受像機では、
その選択を決定する特性として、ビデオ信号の動き特性
を用いている。すなわち、動画に対してフィールド相関
を利用した走査線補間方式を適用した場合には、１フイ
ールドという時間差のために輪郭部分が櫛歯となるため
、動画に対してはライン相関を利用した走査線補間方式
を適用し、静止画に対しては、ライン相関より原画像に
近い再現性が得られるフィールド相関を利用した走査線
補間方式を適用している。In a television receiver that automatically and adaptively selects
The motion characteristics of the video signal are used as the characteristics that determine the selection. In other words, when a scanning line interpolation method using field correlation is applied to a moving image, the contour part becomes comb-like due to the time difference of one field. An interpolation method is applied, and for still images, a scanning line interpolation method using field correlation, which provides reproducibility closer to the original image than line correlation, is applied.
［発明が解決しようとする課題］
しかしながら、フィールド相関を利用した走査線補間方
式を適用している静止画の場合には、原画像に近い垂直
解像度を確保することができるが、ライン相関を利用し
た走査線補間方式を適用している動画の場合、平均処理
のために又は重ね出力のために、垂直解像度が静止画の
場合に比べて半減する。[Problems to be Solved by the Invention] However, in the case of still images to which a scanning line interpolation method using field correlation is applied, it is possible to secure a vertical resolution close to that of the original image; In the case of a moving image to which the scanning line interpolation method is applied, the vertical resolution is halved compared to that of a still image due to averaging processing or overlapping output.
ところで、走査線補間回路を有するテレビジョン受像機
で輪郭強調回路を備えているものがある。By the way, some television receivers having a scanning line interpolation circuit are equipped with an edge enhancement circuit.
このような受像機では、固定的な輪郭強調処理を通じて
垂直解像度の視覚的な劣化を改善することができる。し
かし、全ての画像に対して垂直解像度を適切に改善でき
るわけではなく、輪郭強調によって却って違和感を抱か
せるようになることも生じていた。In such a receiver, visual deterioration in vertical resolution can be improved through fixed edge enhancement processing. However, it is not possible to appropriately improve the vertical resolution of all images, and the edge enhancement sometimes makes the image look unnatural.
このような適用している走査線補間方式によって垂直解
像度が変化するという問題は、走査線補間方式の選択を
自動適応的に行なう場合だけでなく、ユーザの操作によ
って選択する場合にも同様に生じる。This problem of vertical resolution changing depending on the applied scanning line interpolation method occurs not only when the scanning line interpolation method is selected automatically and adaptively, but also when it is selected by user operation. .
本発明は、以上の点を考慮してなされたものであり、入
力ビデオ信号の内容に関係なく、又は、ビデオ信号に対
する所定の処理の適用方式に関係なく解像度を高めるこ
とができるビデオ信号処理装置を提供しようとするもの
である。The present invention has been made in consideration of the above points, and provides a video signal processing device that can increase the resolution regardless of the content of the input video signal or the method of applying predetermined processing to the video signal. This is what we are trying to provide.
［課題を解決するための手段］
かかる課題を解決するため、第１の本発明においては、
入力ビデオ信号の動き検出を行なう動き検出手段と、動
き検出結果に応じて、入力ビデオ信号の少なくとも垂直
方向の輪郭強調量を可変して輪郭強調を行なう輪郭強調
手段とを備えた。[Means for solving the problem] In order to solve the problem, in the first invention,
The apparatus includes a motion detecting means for detecting motion of an input video signal, and an edge emphasizing means for enhancing an edge by varying the amount of edge enhancement in at least the vertical direction of the input video signal in accordance with the motion detection result.
第１．の本発明に係るビデオ信号処理装置が、動き検出
手段から出力された動き検出結果に応じて、走査線補間
方式を選択してビデオ信号の走査線補間を行なう走査線
補間手段を備えていることは、効果からみて特に好まし
い。1st. The video signal processing device according to the present invention comprises scanning line interpolation means for selecting a scanning line interpolation method and performing scanning line interpolation of the video signal according to the motion detection result output from the motion detection means. is particularly preferable in terms of effects.
また、第２の本発明においては、外部からの選択指令に
基づいて、走査線補間方式を選択してビデオ信号の走査
線補間を行なう走査線補間手段を備えたビデオ信号処理
装置において、選択された走査線補間方式に応じて、入
力ビデオ信号の少なくとも垂直方向の輪郭強調量を可変
して輪郭強調を行なう輪郭強調手段を備えた。Further, in the second aspect of the present invention, in a video signal processing device provided with a scanning line interpolation means for selecting a scanning line interpolation method and performing scanning line interpolation of a video signal based on a selection command from the outside, the selected scanning line interpolation method is selected. The apparatus is provided with an edge emphasizing means for emphasizing an edge by varying the amount of edge enhancement in at least the vertical direction of an input video signal in accordance with the scanning line interpolation method.
［作用］
第１の本発明においては、動き検出手段が入力ビデオ信
号の動き検出を行ない、その動き検出結果に応じて、輪
郭強調手段が入力ビデオ信号の少なくとも垂直方向の輪
郭強調量を可変してその入力ビデオ信号に対して輪郭強
調を行なう。すなわち、動き量に応じて輪郭強調量を最
適化する。[Operation] In the first aspect of the present invention, the motion detection means detects the motion of the input video signal, and the edge enhancement means varies the amount of edge enhancement in at least the vertical direction of the input video signal according to the motion detection result. and performs edge enhancement on the input video signal. That is, the amount of edge enhancement is optimized according to the amount of movement.
動き量が解像度に影響を与える場合としては、動き検出
結果に応じて走査線補間方式を切り替える場合が多く、
動き適応型の走査線補間手段を有するものに第１の本発
明を適用することが好ましい。When the amount of motion affects resolution, the scanning line interpolation method is often switched depending on the motion detection results.
It is preferable to apply the first aspect of the present invention to an apparatus having a motion-adaptive scanning line interpolation means.
第２の本発明は、外部からの選択指令に基づいて、走査
線補間方式を選択してビデオ信号の走査線補間を行なう
走査線補間手段を備えたビデオ信号処理装置に対しても
、上述と同様に、入力ビデオ信号の少なくとも垂直方向
の輪郭強調量を可変できる輪郭強調手段を設けて、選択
された走査線補間方式に応じた輪郭強調量をもって、入
力ビデオ信号の少なくとも垂直方向の輪郭を強調するよ
うにした。The second invention also provides a video signal processing device equipped with a scanning line interpolation means for selecting a scanning line interpolation method and performing scanning line interpolation of a video signal based on a selection command from the outside. Similarly, an edge enhancement means that can vary the amount of edge enhancement in at least the vertical direction of the input video signal is provided to emphasize the edge of the input video signal in at least the vertical direction with the amount of edge enhancement depending on the selected scanning line interpolation method. I decided to do so.
［実施例］
以下、本発明の一実施例を図面を参照しながら詳述する
。[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１−図において、コンポジットビデオ信号が入力端子
１を介して入力され、アナログ／デジタル変換回路２に
与えられる。このアナログ／デジタル変換回路２によっ
てデジタル信号に変換されたビデオ信号は、動き検出回
路３及び動き適応型Ｙ／Ｃ分離回路４に与えられる。In FIG. 1, a composite video signal is input through an input terminal 1 and applied to an analog/digital conversion circuit 2. In FIG. The video signal converted into a digital signal by this analog/digital conversion circuit 2 is provided to a motion detection circuit 3 and a motion adaptive Y/C separation circuit 4.
動き検出回路３は、入力ビデオ信号の動き検出を行ない
、入力ビデオ信号が動画であるか静止画であるかを指示
する動き検出信号を出力する。The motion detection circuit 3 performs motion detection on the input video signal and outputs a motion detection signal indicating whether the input video signal is a moving image or a still image.
動き適応型Ｙ／Ｃ分離回路４は、動き検出回路３から与
えられる動き検出信号に応じたＹ／Ｃ分離方式に従って
入力ビデオ信号をＹ／Ｃ分離する。The motion adaptive Y/C separation circuit 4 separates the input video signal in Y/C according to a Y/C separation method according to the motion detection signal provided from the motion detection circuit 3.
例えば、動画の場合にはライン相関を利用してＹ／Ｃ分
離を行ない、静止画の場合にはフレーム相関を利用して
Ｙ／Ｃ分離を行なう。For example, in the case of a moving image, Y/C separation is performed using line correlation, and in the case of a still image, Y/C separation is performed using frame correlation.
分離された色信号は、色信号処理回路５に与えられて自
動彩度調整（ＡＣＣ）及び色復調処理が施された後、さ
らに、色信号走査線補間回路６に与えられて走査線補間
がなされて時間軸圧縮回路７に与えられる。The separated color signals are fed to a color signal processing circuit 5 where they are subjected to automatic saturation adjustment (ACC) and color demodulation processing, and then fed to a color signal scanning line interpolation circuit 6 where they are subjected to scanning line interpolation. and is applied to the time axis compression circuit 7.
分離された輝度信号は、第１及び第２の水平輪郭強調回
路８及び９に与えられる。これら水平輪郭強調回路８及
び９はそれぞれ、後述する第２図に示す詳細構成を有し
、入力された輝度信号に対して水平方向の輪郭を強調し
て出力する。第１の水平輪郭強調回路８は静止画に対応
したものであり、その強調量は小さく選定されている。The separated luminance signals are given to first and second horizontal edge enhancement circuits 8 and 9. Each of these horizontal contour emphasizing circuits 8 and 9 has a detailed configuration shown in FIG. 2, which will be described later, and emphasizes the horizontal contour of the input luminance signal and outputs the result. The first horizontal edge enhancement circuit 8 is compatible with still images, and the amount of enhancement thereof is selected to be small.
一方、第２の水平輪郭強調回路９は動画に対応したもの
であり、その強調量は大きく選定されている。On the other hand, the second horizontal edge enhancement circuit 9 is compatible with moving images, and its enhancement amount is selected to be large.
これら水平輪郭強調回路８及び９からの各出力信号は、
２人力１出力構成のスイッチ回路１０に与えられる。こ
のスイッチ回路１０には切替え制御信号として動き検出
回路３からの動き検出信号が与えられ、スイッチ回路１
０は、動き検出信号が静止画を指示しているときに第１
の水平輪郭強調回路８の出力を選択し、動き検出信号が
動画を指示しているときに第２の水平輪郭強調回路９の
出力を選択する。Each output signal from these horizontal contour enhancement circuits 8 and 9 is
This is applied to a switch circuit 10 having a two-manpower, one-output configuration. A motion detection signal from the motion detection circuit 3 is given to this switch circuit 10 as a switching control signal.
0 is the first when the motion detection signal indicates a still image.
The output of the second horizontal edge enhancement circuit 8 is selected, and when the motion detection signal indicates a moving image, the output of the second horizontal edge enhancement circuit 9 is selected.
このようにして選択された水平輪郭強調後の輝度信号は
、動き適応型の輝度信号走査線補間回路１１に与えられ
る。この輝度信号走査線補間回路］、１．にも、動き検
出回路３から出力された動き検出信号が与えられている
。輝度信号走査線補間囲路１１は、動き検出信号が動画
を指示しているときにライン相関を利用した走査線補間
方式を適用して前後ラインの平均値を得て走査線補間を
行ない、動き検出信号が静止画を指示しているときにフ
ィールド相関を利用した走査線補間方式を適用して走査
線補間を行ない、走査線補間された輝度信号を第１及び
第２の垂直輪郭強調回路１２及び１３に与える。The luminance signal after horizontal edge enhancement selected in this manner is provided to a motion-adaptive luminance signal scanning line interpolation circuit 11. This luminance signal scanning line interpolation circuit], 1. The motion detection signal output from the motion detection circuit 3 is also applied to the motion detection circuit 3. The luminance signal scanning line interpolation circuit 11 performs scanning line interpolation by applying a scanning line interpolation method that utilizes line correlation when the motion detection signal indicates a moving image to obtain the average value of the front and rear lines. When the detection signal indicates a still image, scanning line interpolation is performed by applying a scanning line interpolation method using field correlation, and the scanning line interpolated luminance signal is sent to the first and second vertical edge enhancement circuits 12. and 13.
これら垂直輪郭強調回路１２及び１３はそれぞれ、後述
する第２図に示す詳細構成を有し、入力された輝度信号
に対して垂直方向の輪郭を強調して出力する。第１の垂
直輪郭強調回路１２は静止画に対応したものであり、そ
の強調量は小さく選定されている。一方、第２の垂直輪
郭強調回路１３は動画に対応したものであり、その強調
量は大きく選定されている。Each of these vertical contour emphasizing circuits 12 and 13 has a detailed configuration shown in FIG. 2, which will be described later, and emphasizes the vertical contour of the input luminance signal and outputs it. The first vertical contour enhancement circuit 12 is compatible with still images, and the amount of enhancement thereof is selected to be small. On the other hand, the second vertical contour enhancement circuit 13 is compatible with moving images, and its enhancement amount is selected to be large.
これら垂直輪郭強調回路１２及び１３からの各出力信号
は、２人力１出力構成のスイッチ回路１４に与えられる
。このスイッチ回路１４には切替え制御信号として動き
検出回路３からの動き検出信号が与えられており、スイ
ッチ回路１４は、動き検出信号が静止画を指示している
ときに第１の垂直輪郭強調回路１２の出力を選択し、動
き検出信号が動画を指示しているときに第２の垂直輪郭
強調回路１３の出力を選択する。Each output signal from these vertical contour emphasizing circuits 12 and 13 is applied to a switch circuit 14 having a two-manufacturing and one-output configuration. The switch circuit 14 is given a motion detection signal from the motion detection circuit 3 as a switching control signal, and when the motion detection signal indicates a still image, the switch circuit 14 switches the first vertical contour emphasizing circuit to the first vertical contour emphasizing circuit. 12 is selected, and when the motion detection signal indicates a moving image, the output of the second vertical edge enhancement circuit 13 is selected.
このようにしてスイッチ回路１４で選択されな垂直方向
の輪郭強調後の輝度信号は、時間軸圧縮回路７に与えら
れる。In this way, the vertical edge-enhanced luminance signal that is not selected by the switch circuit 14 is given to the time-base compression circuit 7.
ここで、水平方向及び垂直方向の輪郭強調を行なう際に
、動画と静止画とで強調量を異ならせるようにしたのは
、以下の理由による。動画はライン相関を利用して走査
線補間を行なっているので、静止画に比べて解像度が低
い。そこで、輪郭を明確にして視覚的解像度を高めるよ
うに強調量を一律に高くすることが考えられる。しかし
、強調量を一律に高くすると、フィールド相関を利用し
た走査線補間方式を採用している静止画については、輪
郭が強調されすぎて見にくい画像となる。これに対して
、静止画での解像度を意識して強調量を一律に低くする
と、動画での輪郭部分のぼけ状態を解消することができ
ない。そこで、動画と静止画とで強調量を変えるように
した。Here, the reason why the amount of emphasis is made different between moving images and still images when performing edge enhancement in the horizontal and vertical directions is as follows. Since moving images perform scanning line interpolation using line correlation, their resolution is lower than that of still images. Therefore, it is conceivable to uniformly increase the amount of emphasis so as to clarify the outline and increase visual resolution. However, if the amount of enhancement is uniformly increased, the outline of a still image that uses a scanning line interpolation method using field correlation will be too emphasized, making the image difficult to see. On the other hand, if the amount of enhancement is uniformly lowered with consideration given to the resolution of still images, it will not be possible to eliminate the blurred state of the outline in moving images. Therefore, we decided to change the amount of emphasis between videos and still images.
また、水平輪郭強調回路８又は９の後段に輝度信号走査
線補間回路１１を設け、輝度信号走査線補間回路１１の
後段に垂直輪郭強調回路１２又は１３を設けるようにし
たのは、以下の理由による。Furthermore, the reason why the luminance signal scanning line interpolation circuit 11 is provided after the horizontal edge enhancement circuit 8 or 9 and the vertical edge enhancement circuit 12 or 13 is provided after the luminance signal scanning line interpolation circuit 11 is as follows. by.
水平輪郭強調回路が実行する走査線補間は、走査線が少
ない段階で行なう方が処理がし易く、そのため走査線補
間回路の前段に設けられている。垂直輪郭強調回路は、
各走査線に対して処理を施すものであるので、全ての走
査線が揃う走査線補間回路の後段に設けられる。The scanning line interpolation executed by the horizontal contour emphasizing circuit is easier to perform when the number of scanning lines is small, and therefore it is provided before the scanning line interpolation circuit. The vertical contour enhancement circuit is
Since it processes each scanning line, it is provided after the scanning line interpolation circuit where all the scanning lines are aligned.
時間軸圧縮回路７は、走査線補間処理された輝度信号及
び色信号の時間軸を１／２に圧縮して出力すると共に、
色信号については、さらに第１．及び第２の色差信号に
振り分けて出力する。このようにして時間軸圧縮回路７
から出力された輝度信号及び２個の色差信号はそれぞれ
対応するデジタル／アナログ変換回路１５．１６．１７
によってアナログ信号に変換されて次段に出力される。The time axis compression circuit 7 compresses the time axis of the luminance signal and chrominance signal subjected to the scanning line interpolation process to 1/2 and outputs the compressed time axis.
Regarding the color signal, see 1. and a second color difference signal and output them. In this way, the time axis compression circuit 7
The luminance signal and two color difference signals outputted from the respective digital/analog conversion circuits 15, 16, and 17
is converted into an analog signal and output to the next stage.
次に、第１及び第２の水平輪郭強調回路８及び９、並び
に、第１及び第２の垂直輪郭強調回路１２及び１３の詳
細構成を説明する。Next, detailed configurations of the first and second horizontal edge enhancement circuits 8 and 9 and the first and second vertical edge enhancement circuits 12 and 13 will be explained.
ここで、第２図はこれら輪郭強調回路８．９．１２．１
３を普遍化して示したものであり、第３図は第２図の各
部信号波形図である。Here, FIG. 2 shows these contour enhancement circuits 8.9.12.1
3 is generalized and shown, and FIG. 3 is a signal waveform diagram of each part of FIG. 2.
第２図において、入力輝度信号が縦続接続された２個の
単位遅延回路２０及び２１に与えられ、単位時間ずつ異
なる３個の輝度信号５Ａ−３Ｃ（第３図（Ａ）〜（Ｃ）
）が取出される。In FIG. 2, an input luminance signal is given to two unit delay circuits 20 and 21 connected in cascade, and three luminance signals 5A to 3C (FIGS. 3A to 3C) that differ by unit time are input.
) is retrieved.
輪郭強調回路が水平輪郭強調回路８及び９であれば単位
時間は１ドツト分の時間であり、輪郭強調回路が垂直輪
郭強調回路１２及び１３であれば単位時間は１水平走査
期間（ＩＨ）である。If the edge enhancement circuits are horizontal edge enhancement circuits 8 and 9, the unit time is the time for one dot, and if the edge enhancement circuits are vertical edge enhancement circuits 12 and 13, the unit time is one horizontal scanning period (IH). be.
時間差が最も大きい２個の輝度信号ＳＡ及びＳＣは、加
算器２２に与えられて加算された後、１／２逓倍器２３
によって１／２倍される。かくして、第３図（Ｄ）に示
すように、２個の輝度信号ＳＡ及びＳＣの平均値信号Ｓ
Ｄが得られる。The two luminance signals SA and SC with the largest time difference are given to an adder 22 and added, and then sent to a 1/2 multiplier 23.
is multiplied by 1/2 by Thus, as shown in FIG. 3(D), the average value signal S of the two luminance signals SA and SC
D is obtained.
減算器２４には、出力対象としてのタイミングを有する
輝度信号ＳＢが被減算入力として与えられ、上述した平
均値信号ＳＤが減算入力として与えられており、その差
信号ＳＥ（第３図（Ｅ））を輪郭として取出す。取出さ
れた輪郭信号ＳＥは、ローパスフィルタ回路２５によっ
てノイズ成分が除去され、さらに、バッファ増幅回路２
６によって所定倍されて強調用信号として加算器２７に
与えられる。The subtracter 24 is supplied with a luminance signal SB having timing as an output target as an input to be subtracted, the above-mentioned average value signal SD as a subtraction input, and a difference signal SE (FIG. 3(E)). ) is extracted as a contour. The extracted contour signal SE has noise components removed by a low-pass filter circuit 25, and is further passed through a buffer amplifier circuit 2.
6 is multiplied by a predetermined value and applied to the adder 27 as an emphasis signal.
ここで、この輪郭強調回路が静止画用の回路８及び１２
であれば、バッファ増幅回路２６の利得は小さく選定さ
れており、動画用の回路９及び１３であれば、バッファ
増幅回路２６の利得はそれより大きく選定されている。Here, this contour emphasizing circuit is used for still image circuits 8 and 12.
If so, the gain of the buffer amplifier circuit 26 is selected to be small, and if the circuits 9 and 13 are for moving pictures, the gain of the buffer amplifier circuit 26 is selected to be larger than that.
加算器２７には、出力対象としてのタイミングを有する
輝度信号ＳＢも与えられており、この輝度信号ＳＢに強
調用信号が加算され、強調された輝度信号ＳＦ（第３図
（Ｆ））が形成されて出力される。The adder 27 is also supplied with a brightness signal SB having timing as an output target, and an emphasis signal is added to this brightness signal SB to form an emphasized brightness signal SF (FIG. 3(F)). and output.
この実施例では、第２図に示す構成を有して上述したよ
うに動作する輪郭強調回路を、第１図の各輪郭強調回路
８．９．１２．１３に適用している。In this embodiment, the contour emphasizing circuit having the configuration shown in FIG. 2 and operating as described above is applied to each of the contour emphasizing circuits 8.9.12.13 in FIG.
従って、上述の実施例によれば、ビデオ信号（輝度信号
）の内容に応じて輪郭強調量を変えるようにしているの
で、動画及び静止画ともに十分な解像度を実現すること
ができる。また、走査線補間処理によって生じる解像度
の劣化を補っている。Therefore, according to the above-described embodiment, since the amount of edge enhancement is changed depending on the content of the video signal (luminance signal), sufficient resolution can be achieved for both moving images and still images. It also compensates for the deterioration in resolution caused by scanning line interpolation processing.
なお、上述の実施例では、走査線補間回路を有するもの
に適用した場合を示したが、走査線補間回路の有無に関
係なく輪郭強調回路を有するビデオ信号処理装置に、本
発明を広く適用することができる。In addition, although the above-mentioned embodiment shows the case where the present invention is applied to an apparatus having a scanning line interpolation circuit, the present invention can be broadly applied to a video signal processing apparatus having an edge enhancement circuit regardless of the presence or absence of a scanning line interpolation circuit. be able to.
また、走査線補間回路を有するものであって、その走査
線補間方式の選択がユーザによって指示されるものに対
しても、本発明を適用することができる。すなわち、フ
ィールド相関を利用した補間方式が選択された場合には
強調量を小さくし、ライン相関を利用した補間方式が選
択された場合には強調量を大きくする。Further, the present invention can also be applied to devices that include a scanning line interpolation circuit, and the selection of the scanning line interpolation method is instructed by the user. That is, when an interpolation method using field correlation is selected, the amount of emphasis is reduced, and when an interpolation method using line correlation is selected, the amount of emphasis is increased.
上述では、輪郭強調を輝度信号に対して施すものを示し
たが、コンポジットビデオ信号に対して行なうものであ
っても良い。In the above description, edge enhancement is applied to a luminance signal, but it may also be applied to a composite video signal.
輪郭強調量の可変方法として、上述の実施例では２個の
輪郭強調回路を設けてそれを選択するようにしたものを
示したが、可変構成の１個の輪郭強調回路（例えば、第
２図におけるバッファ増幅回ｉｉ！＠２６の利得を可変
できるもの）を適用してその強調量を可変させるように
しても良い。また、複数の輪郭強調回路を設けてその出
力の合成を動き検出信号によって適応的に変えて強調量
を変えるようにしても良い。As a method for varying the amount of edge enhancement, in the above-described embodiment, two edge enhancement circuits are provided and the selected one is selected. The amount of emphasis may be varied by applying a buffer amplification circuit ii!@26 whose gain can be varied. Alternatively, a plurality of contour enhancement circuits may be provided and the amount of enhancement may be changed by adaptively changing the synthesis of their outputs depending on the motion detection signal.
また、上述では、動画と静止画とで強調量を変えるもの
を示したが、動画でも動きの速いものと遅いものとで強
調量を変えるようにしても良い。Further, although the above description shows that the amount of emphasis is changed between moving images and still images, the amount of emphasis may also be changed between fast moving images and slow moving images.
すなわち、３以上の範囲で変えるようにしても良い。こ
のことは、動き検出を利用しないものにも言えることで
ある。すなわち、走査線補間方式として３個以上の補間
方式を切り替えて用いるものに対しても本発明を適用す
ることができる。In other words, it may be changed within a range of 3 or more. This also applies to those that do not use motion detection. That is, the present invention can also be applied to a scanning line interpolation method that switches between three or more interpolation methods.
［発明の効果］
以上のように、本発明によれば、入力ビデオ信号の内容
に関係なく、又は、ビデオ信号に対する走査線補間処理
の適用方式に関係なく、従来に比して解像度を高めるこ
とができる。[Effects of the Invention] As described above, according to the present invention, the resolution can be increased compared to the conventional art, regardless of the content of the input video signal or the method of applying scanning line interpolation processing to the video signal. I can do it.
第１図は本発明によるビデオ信号処理装置の一実施例を
示すブロック図、第２図はその輪郭強調回路の詳細構成
を示すブロック図、第３図は第２図の各部信号波形図で
ある。
３・・・動き検出回路、６・・・色信号走査線補間回路
、８．９・・・水平輪郭強調回路、１−０．１４・・・
スイッチ回路、１１・・・輝度信号走査線補間回路、１
２．１３・・・垂直輪郭強調回路。FIG. 1 is a block diagram showing an embodiment of a video signal processing device according to the present invention, FIG. 2 is a block diagram showing a detailed configuration of an edge enhancement circuit thereof, and FIG. 3 is a signal waveform diagram of each part of FIG. 2. . 3...Motion detection circuit, 6...Color signal scanning line interpolation circuit, 8.9...Horizontal contour enhancement circuit, 1-0.14...
Switch circuit, 11... Luminance signal scanning line interpolation circuit, 1
2.13... Vertical contour enhancement circuit.
Claims (4)
と、 動き検出結果に応じて、上記入力ビデオ信号の少なくと
も垂直方向の輪郭強調量を可変して輪郭強調を行なう輪
郭強調手段とを備えたことを特徴とするビデオ信号処理
装置。(1) A motion detecting means for detecting motion of an input video signal; and an edge emphasizing means for enhancing an edge by varying the amount of edge enhancement in at least the vertical direction of the input video signal according to the motion detection result. A video signal processing device characterized by:
応じて、走査線補間方式を選択してビデオ信号の走査線
補間を行なう走査線補間手段を設けたことを特徴とする
請求項第１項に記載のビデオ信号処理装置。(2) A scanning line interpolation means is provided which selects a scanning line interpolation method and performs scanning line interpolation of the video signal according to the motion detection result outputted from the motion detection means. The video signal processing device described in Section 1.
を選択してビデオ信号の走査線補間を行なう走査線補間
手段を備えたビデオ信号処理装置において、 選択された走査線補間方式に応じて、入力ビデオ信号の
少なくとも垂直方向の輪郭強調量を可変して輪郭強調を
行なう輪郭強調手段を備えたことを特徴とするビデオ信
号処理装置。(3) In a video signal processing device equipped with a scanning line interpolation means that selects a scanning line interpolation method and performs scanning line interpolation of a video signal based on an external selection command, 1. A video signal processing device comprising: an edge emphasizing means that performs edge enhancement by varying an amount of edge enhancement in at least the vertical direction of an input video signal.
求項第１項〜第３項のいずれかに記載のビデオ信号処理
装置。(4) The video signal processing device according to any one of claims 1 to 3, wherein the video signal is a luminance signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1330679A JPH03190473A (en) | 1989-12-20 | 1989-12-20 | Video signal processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1330679A JPH03190473A (en) | 1989-12-20 | 1989-12-20 | Video signal processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03190473A true JPH03190473A (en) | 1991-08-20 |
Family
ID=18235369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1330679A Pending JPH03190473A (en) | 1989-12-20 | 1989-12-20 | Video signal processor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03190473A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06334902A (en) * | 1993-05-20 | 1994-12-02 | Victor Co Of Japan Ltd | Picture quality compensating device |
| US6215525B1 (en) | 1997-08-26 | 2001-04-10 | Nec Corporation | Scanning line interpolation apparatus and method |
| JP2001203911A (en) * | 2000-01-24 | 2001-07-27 | Canon Inc | Circuit and method for driving image display device |
| WO2005091648A1 (en) * | 2004-03-23 | 2005-09-29 | Sony Corporation | Motion-adaptive 3d y/c separation system and image improving method |
| JP2006217385A (en) * | 2005-02-04 | 2006-08-17 | Sharp Corp | Television image processor |
| JP2008028507A (en) * | 2006-07-19 | 2008-02-07 | Sony Corp | Image correction circuit, image correction method and image display |
| WO2008136286A1 (en) * | 2007-04-27 | 2008-11-13 | Sharp Kabushiki Kaisha | Image processing device and method, and image display device and method |
| JP2009159337A (en) * | 2007-12-27 | 2009-07-16 | Mitsubishi Electric Corp | Video signal processing apparatus, video signal processing method and video signal display apparatus |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61152185A (en) * | 1984-12-26 | 1986-07-10 | Hitachi Ltd | Scan converting circuit |
| JPS6310892A (en) * | 1986-07-01 | 1988-01-18 | Matsushita Electric Ind Co Ltd | Vertical contour correction device |
| JPS6359172A (en) * | 1986-08-28 | 1988-03-15 | Matsushita Electric Ind Co Ltd | Contour compensating device for television signal |
| JPS63217782A (en) * | 1987-03-05 | 1988-09-09 | Matsushita Electric Ind Co Ltd | Scanning converting circuit |
| JPS63260277A (en) * | 1987-04-16 | 1988-10-27 | Victor Co Of Japan Ltd | Movement adaptive type picture quality improvement device |
| JPS63268376A (en) * | 1987-04-27 | 1988-11-07 | Hitachi Ltd | Video signal processing circuit |
| JPH01157675A (en) * | 1987-12-15 | 1989-06-20 | Matsushita Electric Ind Co Ltd | Vertical outline correcting device |
| JPH01215185A (en) * | 1988-02-24 | 1989-08-29 | Hitachi Ltd | Contour compensation circuit |
-
1989
- 1989-12-20 JP JP1330679A patent/JPH03190473A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61152185A (en) * | 1984-12-26 | 1986-07-10 | Hitachi Ltd | Scan converting circuit |
| JPS6310892A (en) * | 1986-07-01 | 1988-01-18 | Matsushita Electric Ind Co Ltd | Vertical contour correction device |
| JPS6359172A (en) * | 1986-08-28 | 1988-03-15 | Matsushita Electric Ind Co Ltd | Contour compensating device for television signal |
| JPS63217782A (en) * | 1987-03-05 | 1988-09-09 | Matsushita Electric Ind Co Ltd | Scanning converting circuit |
| JPS63260277A (en) * | 1987-04-16 | 1988-10-27 | Victor Co Of Japan Ltd | Movement adaptive type picture quality improvement device |
| JPS63268376A (en) * | 1987-04-27 | 1988-11-07 | Hitachi Ltd | Video signal processing circuit |
| JPH01157675A (en) * | 1987-12-15 | 1989-06-20 | Matsushita Electric Ind Co Ltd | Vertical outline correcting device |
| JPH01215185A (en) * | 1988-02-24 | 1989-08-29 | Hitachi Ltd | Contour compensation circuit |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06334902A (en) * | 1993-05-20 | 1994-12-02 | Victor Co Of Japan Ltd | Picture quality compensating device |
| US6215525B1 (en) | 1997-08-26 | 2001-04-10 | Nec Corporation | Scanning line interpolation apparatus and method |
| JP2001203911A (en) * | 2000-01-24 | 2001-07-27 | Canon Inc | Circuit and method for driving image display device |
| WO2005091648A1 (en) * | 2004-03-23 | 2005-09-29 | Sony Corporation | Motion-adaptive 3d y/c separation system and image improving method |
| JP2006217385A (en) * | 2005-02-04 | 2006-08-17 | Sharp Corp | Television image processor |
| JP4526405B2 (en) * | 2005-02-04 | 2010-08-18 | シャープ株式会社 | TV image processing device |
| JP2008028507A (en) * | 2006-07-19 | 2008-02-07 | Sony Corp | Image correction circuit, image correction method and image display |
| WO2008136286A1 (en) * | 2007-04-27 | 2008-11-13 | Sharp Kabushiki Kaisha | Image processing device and method, and image display device and method |
| US8462266B2 (en) | 2007-04-27 | 2013-06-11 | Sharp Kabushiki Kaisha | Image processing device and method, and image display device and method |
| JP2009159337A (en) * | 2007-12-27 | 2009-07-16 | Mitsubishi Electric Corp | Video signal processing apparatus, video signal processing method and video signal display apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5095354A (en) | Scanning format converter with motion compensation | |
| JP2634632B2 (en) | Motion detection circuit | |
| JP2001204045A (en) | Motion detector | |
| JPH06327030A (en) | Motion detecting circuit | |
| JPH03190473A (en) | Video signal processor | |
| JP3231309B2 (en) | Motion information signal detection circuit | |
| JPH0779476B2 (en) | Luminance signal Color signal separation circuit | |
| JPH0832025B2 (en) | Motion-aware signal processing circuit | |
| JPH06311488A (en) | Scanning line converter | |
| JP2942261B2 (en) | Motion detection circuit | |
| JPH02111188A (en) | Picture quality improving device | |
| JPS62128288A (en) | Movement detecting circuit for high definition television system | |
| JP3350322B2 (en) | Video signal processing device | |
| JPH04172875A (en) | Adaptive contour emphasis circuit | |
| JPH082101B2 (en) | Motion adaptive scan line interpolation circuit | |
| JP2523373B2 (en) | Motion adaptive luminance signal color signal separation device | |
| JP3058647B2 (en) | Image signal motion detection circuit and motion adaptive signal processing circuit | |
| JP2600196B2 (en) | Signal separation device | |
| JPH0638541Y2 (en) | Digital processing circuit for television signals | |
| JP2804795B2 (en) | Motion detection circuit | |
| JP2690174B2 (en) | Luminance / color signal separation device | |
| JP2600884B2 (en) | Television receiver | |
| JPH01195793A (en) | Television receiver | |
| JP2897277B2 (en) | Video signal control device | |
| JP3517037B2 (en) | Motion adaptive video signal processor |