JPH01246981A - Picture quality improvement device - Google Patents

Picture quality improvement device

Info

Publication number
JPH01246981A
JPH01246981A JP63075593A JP7559388A JPH01246981A JP H01246981 A JPH01246981 A JP H01246981A JP 63075593 A JP63075593 A JP 63075593A JP 7559388 A JP7559388 A JP 7559388A JP H01246981 A JPH01246981 A JP H01246981A
Authority
JP
Japan
Prior art keywords
circuit
signal
signals
low
flare
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
Application number
JP63075593A
Other languages
Japanese (ja)
Inventor
Hideaki Miura
英明 三浦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP63075593A priority Critical patent/JPH01246981A/en
Publication of JPH01246981A publication Critical patent/JPH01246981A/en
Pending legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)
  • Color Television Systems (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To satisfactorily perform flare correction irrespective of the content of a picture by detecting the presence or absence of movement in inputted TV signals by means of a detection circuit and changing a gain of low-band extracted signals based on the movement signal of the circuit and the degree of the flare correction in accordance with the presence/absence of the movement. CONSTITUTION:When the input luminance signal YID of the dynamic part of a picture is given, a movement detection circuit 15 detects the signal YID and switches a switch 13 so as to select an LPF 12 through a phase shift circuit 14. Then the circuit 15 sends the output of the switch 13 to an arithmetic circuit 3 after D/A conversion 2. At the circuit 3 a low-band extracted signal YL is subtracted from signals YIA and subtracted signals YS are given to an adder 6 after the signals YS are multiplied by a prescribed number at a constant multiplier 7. At the circuit 6, the signals YIA are added to the multiplied signals YSM and output signals YO whose intermediate-high band is emphasized stronger than the low band in both horizontal and vertical directions, namely, flare-corrected output signals YO are extracted. Therefore, easily seeable pictures are realized by changing the intermediate-high band emphasizing degree of flare correction depending upon the still and dynamic parts of pictures.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は画質改善装置に関し、例えば、テレビジョン受
像機やビデオプロジェクタ等に適用し得るものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an image quality improvement device, and can be applied to, for example, a television receiver, a video projector, and the like.

[従来の技術] テレビジョン受像機やビデオプロジェクタ等において、
例えば、第2図に示すような所定色の周囲部BLと異な
る彩色が施された矩形形状の中央部WTでなる画像を表
示する場合、投射管や受1象管のレンズや照射面におけ
る光線の反射、散乱のために、輝度差や色度差の大きい
エツジ部EDがぼけるフレアという現象が生じる。
[Prior art] In television receivers, video projectors, etc.
For example, when displaying an image consisting of a peripheral part BL of a predetermined color and a rectangular central part WT colored differently as shown in FIG. Due to the reflection and scattering of light, a phenomenon called flare occurs in which edge portions ED with large differences in brightness and chromaticity are blurred.

このようなフレア現象による画質低下をテレビジョン信
号の処理系において補正する画質改善装置が既に提案さ
れている。すなわち、例えば、第2図の水平方向の走査
線L1に対応するテレビジョン信号は、第3図(A>に
示すように矩形パルス信号S1となるが、この信号を第
3図(B)に示すように中高域成分を強調した信号S2
に変換して受像管や照射面に表示させた場合に輝度差や
色度差の大きい部分をも明確に見えるようにする補正を
行なう。このような中高域強調を水平方向及び垂直方向
の全てに行ない、フレア補正を実行する。
An image quality improvement device has already been proposed that corrects the deterioration in image quality due to such a flare phenomenon in a television signal processing system. That is, for example, the television signal corresponding to the horizontal scanning line L1 in FIG. 2 becomes a rectangular pulse signal S1 as shown in FIG. Signal S2 with emphasized mid-high frequency components as shown
When displayed on a picture tube or illumination surface, correction is performed so that even areas with large differences in brightness and chromaticity can be clearly seen. Such mid-high range emphasis is performed in both the horizontal and vertical directions to perform flare correction.

「発明が解決しようとする課題1 ところで、現在普及しているテレビジョンカメラは、移
動物体を撮影するとき著しく解像度が低下する。しかし
、人間の目は移動物体に対する視力が低下するなめに、
多くの場合には移動物体に対するテレビジョンカメラの
解像度の低下による不都合を生じない。そこで、フレア
補正のための中高域成分の強調度合は、静止部に対して
良好に見える程度に選定されていた。
``Problem to be solved by the invention 1 By the way, the resolution of the currently popular television cameras decreases significantly when photographing moving objects.However, since the human eye's visual acuity for moving objects decreases,
In many cases, the reduction in resolution of the television camera for moving objects does not cause any inconvenience. Therefore, the degree of emphasis of mid-high frequency components for flare correction has been selected to a level that makes the stationary part look good.

しかしながら、ゆっくりと移動する物体等がある場合に
は、視力低下がさほどではなく、移動によるエツジ部分
のぼけとフレア現象とが相俟ってかえって表示画像を見
苦しくすることがある。そこで、そのようなゆっくりと
移動する物体を含む画像に合わせてフレア補正における
強調度合を選定することが考えられるが、この場合にお
いて画像の静止部をフレア補正して表示すると、強調が
過度になって画質を低下させることが生じる。
However, when there is an object that moves slowly, the visual acuity decrease is not so great, and the blurring of the edge portion due to the movement and the flare phenomenon may combine to make the displayed image difficult to see. Therefore, it may be possible to select the degree of emphasis in flare correction according to images that include such slowly moving objects, but in this case, if the still part of the image is displayed with flare correction, the emphasis may be excessive. This may cause the image quality to deteriorate.

本発明は、以上の点を考慮してなされたもので、画像内
容に拘らずフレア補正を良好に実行することのできる画
質改善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 it is an object of the present invention to provide an image quality improvement device that can satisfactorily perform flare correction regardless of the image content.

[課題を解決するための手段] かかる課題を解決するため、本発明においては、入力テ
レビジョン信号を2次元ローパスフィルタ部を介してそ
の低域成分を抽出し、この低域抽出信号と原テレビジョ
ン信号とを合成して原テレビジョン信号の中高域成分を
強調した出力テレビジョン信号を得る画質改善装置にお
いて、入力テレビジョン信号の動きの有無を検出する動
き検出回路と、動き検出信号に応じて2次元ローパスフ
ィルタ部から出力される低域抽出信号の利得を可変する
利得可変手段とを設けた。
[Means for Solving the Problems] In order to solve the problems, the present invention extracts the low frequency components of an input television signal through a two-dimensional low-pass filter section, and combines this low frequency extracted signal with the original television signal. In an image quality improvement device that obtains an output television signal that emphasizes mid-high frequency components of the original television signal by combining it with a motion detection circuit and a motion detection circuit that detects the presence or absence of movement in the input television signal, and gain variable means for varying the gain of the low frequency extraction signal output from the two-dimensional low-pass filter section.

[作用] 入力テレビジョン信号の低域成分を抽出し、原テレビジ
ョン信号と合成してフレア補正された出力テレビジョン
信号を得ると共に、その際入力テレビジョン信号におけ
る動きの有無を動き検出回路によって検出し、その動き
検出信号に基づいて利得可変手段が低域抽出信号の利得
を可変し、動きの有無によってフレア補正度合を異なら
せるようにした。
[Operation] Extracts the low-frequency component of the input television signal and combines it with the original television signal to obtain a flare-corrected output television signal. The gain variable means varies the gain of the low frequency extraction signal based on the motion detection signal, and the degree of flare correction is varied depending on the presence or absence of motion.

その結果、動いている部分及び静止している部分の両方
について適切なフレア補正を実行できるようになった。
As a result, it has become possible to perform appropriate flare correction for both moving and stationary parts.

[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、デジタル信号でなる入力輝度信号YI
Dは、2次元ローパスフィルタ部1に与えられる。この
2次元ローパスフィルタ部1は、入力輝度信号YIDか
ら水平方向及び垂直方向についての低域成分を抽出し、
その2次元的な低域抽出信号をデジタル/アナログ変換
回路2を介してアナログ信号YLに変換して減算回路3
に減算信号として与える。
In FIG. 1, the input luminance signal YI is a digital signal.
D is given to the two-dimensional low-pass filter section 1. This two-dimensional low-pass filter section 1 extracts low-frequency components in the horizontal and vertical directions from the input luminance signal YID,
The two-dimensional low frequency extraction signal is converted into an analog signal YL via a digital/analog conversion circuit 2 and a subtraction circuit 3
is given as a subtraction signal.

また、入力輝度信号YIDは、遅延補償回路4に与えら
れる。遅延補償回路4は、2次元ローパスフィルタ部1
が低域抽出動作するに要する時間だけ入力輝度信号YI
Dを遅延させてデジタル/アナログ変換回路5に与える
。デジタル/アナログ変換回路5は、遅延後の入力輝度
信号YIDをアナログ信号YIAに変換して減算回i¥
83に被減算信号として与える。
Further, the input luminance signal YID is provided to the delay compensation circuit 4. The delay compensation circuit 4 includes a two-dimensional low-pass filter section 1
input luminance signal YI for the time required for low frequency extraction operation.
D is delayed and applied to the digital/analog conversion circuit 5. The digital/analog conversion circuit 5 converts the delayed input luminance signal YID into an analog signal YIA and performs subtraction times i\
83 as a signal to be subtracted.

減算回路3は、アナログ信号に変換された入力輝度信号
YIAから、この輝度信号YIAの2次元的な低域成分
である低域抽出信号YLを減算して係数器7に与える。
The subtraction circuit 3 subtracts a low frequency extraction signal YL, which is a two-dimensional low frequency component of the luminance signal YIA, from the input luminance signal YIA converted into an analog signal, and supplies the result to the coefficient unit 7.

係数器7は、フレア補正が良好になるようにその減算信
号YSを所定倍して加算回路6に与える。加算回路6に
はまた、入力輝度信号YIAが与えられており、到来す
る所定倍された減算信号YSMにこの輝度信号YIAを
加算する。
The coefficient multiplier 7 multiplies the subtracted signal YS by a predetermined value and supplies the multiplied signal to the adder circuit 6 so as to improve flare correction. The adder circuit 6 is also supplied with an input luminance signal YIA, and adds this luminance signal YIA to the incoming subtraction signal YSM that has been multiplied by a predetermined value.

従って、加算回路6の出力信号YOは、入力輝度信号Y
IAに比較して、低域成分に対して中高域成分が強11
された輝度信号、すなわち、フレア補正された輝度信号
となっており、次段に出力される。
Therefore, the output signal YO of the adder circuit 6 is the input luminance signal Y
Compared to IA, mid-high frequency components are stronger than low frequency components11
The brightness signal is a flare-corrected brightness signal, and is output to the next stage.

以上の構成に加えて、この実施例では、画像の動き情報
に応じてフレア補正の度合を可変する構成を有する。
In addition to the above configuration, this embodiment has a configuration in which the degree of flare correction is varied according to image motion information.

2次元ローパスフィルタ部1は、詳細には、画像の静止
部分用の2次元ローパスフィルタ11と、画像の動部分
用の2次元ローパスフィルタ12とを備えており、2人
力1出力構成のスイッチ回路13を介してこれらローパ
スフィルタ11または12からの一方の2次元低域抽出
信号をこの2次元ローパスフィルタ部1の出力信号YL
として送出するようになされている。
Specifically, the two-dimensional low-pass filter unit 1 includes a two-dimensional low-pass filter 11 for a static part of an image and a two-dimensional low-pass filter 12 for a moving part of an image, and is a switch circuit with a two-manufacturing and one-output configuration. 13, one of the two-dimensional low-frequency extracted signals from these low-pass filters 11 or 12 is converted into an output signal YL of this two-dimensional low-pass filter section 1.
It is designed to be sent as .

なお、静止部分用の2次元ローパスフィルタ11の通過
特性は、動部分用の2次元ローパスフィルタ12の通過
特性に比べて通過片波数帯域が等しく、その利得が大き
くなるように選定されている。すなわち、静止部分用の
ローパスフィルタ11が選択された場合に加算回路6か
ら出力される輝度信号Y○における中高域強調度合より
、動部分用のローパスフィルタ12が選択された場合に
加算回路6から出力される輝度信号YOにおける中高域
強調度合が大きくなるように各ローパスフィルタ11及
び12の通過特性が選定されている。
Note that the pass characteristics of the two-dimensional low-pass filter 11 for the stationary part are selected so that the pass wave number band is the same and the gain is larger than that of the two-dimensional low-pass filter 12 for the moving part. That is, when the low-pass filter 12 for the moving part is selected, the degree of emphasis of the mid-high range in the brightness signal Y○ output from the adder circuit 6 is higher than the degree of emphasis from the adder circuit 6 when the low-pass filter 11 for the static part is selected. The pass characteristics of each of the low-pass filters 11 and 12 are selected so that the degree of emphasis of middle and high frequencies in the output luminance signal YO is increased.

上述のスイッチ回路13には、移相回路14を介した動
き検出回路15からの動き検出信号が切換制御信号SW
として与えられるようになされている。動き検出回路1
5には、入力輝度信号YIDと、この入力輝度信号YI
Dが1フレーム遅延回路16を介して1フレームだけ遅
延された輝度信号YIDDとが与えられており、これら
輝度信号YID及びYIDDを比較して画像内容の動き
の有無を1サンプリング周期毎に検出しており、動きが
あると検出したときには、動部分用のローパスフィルタ
12からの出力信号を選択させ、動きがないと検出した
ときには、静止部分用のローパスフィルタ11からの出
力信号を選択させるような切換制御信号SWを移相回路
14を介してスイッチ回路13に与えるようになされて
いる。
The above-mentioned switch circuit 13 receives the motion detection signal from the motion detection circuit 15 via the phase shift circuit 14 as a switching control signal SW.
It is given as follows. Motion detection circuit 1
5 contains the input luminance signal YID and the input luminance signal YI.
A luminance signal YIDD in which D is delayed by one frame through a one-frame delay circuit 16 is provided, and the presence or absence of movement in the image content is detected every sampling period by comparing these luminance signals YID and YIDD. When it is detected that there is movement, the output signal from the low-pass filter 12 for the moving part is selected, and when it is detected that there is no movement, the output signal from the low-pass filter 11 for the stationary part is selected. The switching control signal SW is applied to the switch circuit 13 via the phase shift circuit 14.

なお、移相回路14は、ローパスフィルタ11及び12
による低域抽出動作に伴う処理時間と、動き検出回路1
5による動き検出動作に伴う処理時間との差を補償する
ためのものである。
Note that the phase shift circuit 14 includes low-pass filters 11 and 12.
Processing time associated with low frequency extraction operation and motion detection circuit 1
This is to compensate for the difference in processing time associated with the motion detection operation according to No. 5.

以上の構成において、画像の動部分の入力輝度信号YI
Dが与えられると、動き検出回路15がこの入力輝度信
号YIDと1フレーム遅延回路16を介した輝度信号Y
IDDとから動きがあることを検出して移相回路14を
介してローパスフィルタ12側を選択させる切換制御信
号SWをスイッチ回路13に与えて切換動作させる。
In the above configuration, the input luminance signal YI of the moving part of the image
When D is given, the motion detection circuit 15 converts this input luminance signal YID and the luminance signal Y via the one frame delay circuit 16.
When detecting that there is movement from the IDD, a switching control signal SW for selecting the low-pass filter 12 side is applied to the switch circuit 13 via the phase shift circuit 14 to perform a switching operation.

かくして、動部分用のローパスフィルタ12が入力輝度
信号YIDから抽出した2次元低域抽出信号YLがスイ
ッチ回路13を介し、さらにデジタル/アナログ変換回
路2によってアナログ信号に変換されて減算回路3に与
えられる。
In this way, the two-dimensional low-frequency extraction signal YL extracted from the input luminance signal YID by the low-pass filter 12 for the moving part passes through the switch circuit 13, is further converted into an analog signal by the digital/analog conversion circuit 2, and is applied to the subtraction circuit 3. It will be done.

また、入力輝度信号YIDは遅延補償回路4に与えられ
、2次元ローパスフィルタ部1による動作遅延時間を補
償する分だけ遅延され、デジタル/アナログ変換回路5
を介して減算回路3に与えられる。
In addition, the input luminance signal YID is given to the delay compensation circuit 4, and is delayed by an amount to compensate for the operation delay time caused by the two-dimensional low-pass filter section 1, and the digital/analog conversion circuit 5
is applied to the subtraction circuit 3 via.

この減算回路3によって、アナログ信号に変換された入
力輝度信号YIAから2次元ローパスフィルタ部1によ
る低域抽出信号YLが減算され、この減算信号YSが係
数器7を介して所定倍されて加算回路6に与えられ、こ
れに加算回路6によって入力輝度信号YIAが加算され
て水平方向及び垂直方向についてその中高域が低域より
大きく強調された、すなわち大きくフレア補正された出
力輝度信号YOが得られて次段に出力される。
This subtracting circuit 3 subtracts the low frequency extraction signal YL from the two-dimensional low-pass filter unit 1 from the input luminance signal YIA converted into an analog signal, and this subtracted signal YS is multiplied by a predetermined value via a coefficient unit 7, and then the adder circuit 6, and the input luminance signal YIA is added to this by the adder circuit 6 to obtain an output luminance signal YO in which the mid-high range is emphasized more than the low range in the horizontal and vertical directions, that is, the output luminance signal YO is largely flare-corrected. and output to the next stage.

他方、画像の静止部分の入力輝度信号YIDが与えられ
ると、動き検出回路15からの切換制御信号SWによっ
て静止部分用のローパスフィルタ11が選択され、この
ローパスフィル多11による2次元低域抽出信号YLが
スイッチ回路13及びデジタル/アナログ変換回路2を
介して減算回路3に与えられる。
On the other hand, when the input luminance signal YID of the still part of the image is given, the low-pass filter 11 for the still part is selected by the switching control signal SW from the motion detection circuit 15, and the two-dimensional low-frequency extraction signal by this low-pass filter multiplier 11 is YL is applied to the subtraction circuit 3 via the switch circuit 13 and the digital/analog conversion circuit 2.

かくして、この減算回路3、係数器7及び加算回路6に
よって上述の動部分の場合と同様に処理されてフレア補
正された出力輝度信号YOが次段に出力される。なお、
このときには、ローパスフィルタ11が選択されている
ため、出力輝度信号Y○における中高域強調度合は小さ
くなっている。
Thus, the subtracter circuit 3, coefficient unit 7, and adder circuit 6 process the flare-corrected output luminance signal YO in the same manner as in the case of the moving part described above, and output it to the next stage. In addition,
At this time, since the low-pass filter 11 is selected, the degree of emphasis of the middle and high frequencies in the output luminance signal Y○ is small.

従って、上述の実施例によれば、画像の静止部分である
か、動部分であるかによってフレア補正の中高域強調度
合を変化させるようにしたので、画像内容に応じたフレ
ア補正を実行でき、このフレア補正によって画像内容に
拘らず見易い画像を実現できる。
Therefore, according to the above-described embodiment, since the degree of emphasis of the mid-high range of flare correction is changed depending on whether the image is a static part or a moving part, flare correction can be performed according to the image content. This flare correction makes it possible to realize an image that is easy to view regardless of the image content.

なお、上述の実施例においては、輝度信号の段階でフレ
ア補正する装置に対して適用するものを示したが、原色
信号の段階でフレア補正するものに対しても適用するこ
とができる。また、輝度信号から2次元低域成分を抽出
し、この2次元低域抽出信号によって各原色信号をフレ
ア補正するものに対しても適用することができる。
In the above-described embodiment, the present invention is applied to an apparatus that performs flare correction at the luminance signal level, but the present invention can also be applied to an apparatus that performs flare correction at the primary color signal level. The present invention can also be applied to a system in which a two-dimensional low-frequency component is extracted from a luminance signal, and each primary color signal is subjected to flare correction using this two-dimensional low-frequency extracted signal.

また、上述の実施例においては、静止部分用のローパス
フィルタ11と、動部分用のローパスフィルタ12とを
別個に設けてフレア補正の強調度合を可変するものを示
したが、他の方法によってフレア補正の強調度合を可変
するよう−しても良い。例えば、1個の2次元ローパス
フィルタを設け、その出力を可変増幅器または可変減衰
器を介して減算回路に与えると共に、動き検出回路の検
出信号によって可変増幅器または可変減衰器の増幅率ま
たは減衰率を可変することでフレア補正の強調度合を可
変するようにしても良い。
Furthermore, in the above-described embodiment, the low-pass filter 11 for the stationary portion and the low-pass filter 12 for the moving portion are provided separately to vary the degree of emphasis of flare correction, but other methods may be used to correct flare. The degree of emphasis of the correction may be varied. For example, one two-dimensional low-pass filter is provided, its output is fed to a subtraction circuit via a variable amplifier or variable attenuator, and the amplification factor or attenuation factor of the variable amplifier or variable attenuator is determined by the detection signal of the motion detection circuit. The degree of emphasis of flare correction may also be varied by varying this.

さらに、上述の実施例においては、動きの有無によって
フレア補正における強調度合を可変するものを示したが
、これに加えて動きの速度によってもフレア補正の強調
度合を可変するようにしても良い。
Further, in the above embodiment, the degree of emphasis in flare correction is varied depending on the presence or absence of movement, but in addition to this, the degree of emphasis in flare correction may also be varied depending on the speed of movement.

[発明の効果] 以上のように、本発明によれば、動いている部分と静止
している部分とでフレア補正における中高域強調の程度
を可変するようにしたので、画像内容に拘らず良好にフ
レア補正を実行することのできる画質改善装置を得るこ
とができる。
[Effects of the Invention] As described above, according to the present invention, the degree of mid-high range emphasis in flare correction is varied between moving parts and stationary parts, so that good results can be obtained regardless of the image content. Accordingly, an image quality improvement device capable of performing flare correction can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明による画質改善装置の一実施例を示すブ
ロック図、第2図はフレア現象の説明に供する路線図、
第3図はフレア現象の補正の説明に供する信号波形図で
ある。 1・・・2次元ローパスフィルタ部、3・・・減算回路
、6・・・加算回路、7・・・係数器、11・・・静止
部分用のローパスフィルタ、12・・・動部分用のロー
パスフィルタ、13・・・スイッチ回路、15・・・動
き検出回路。
FIG. 1 is a block diagram showing an embodiment of the image quality improvement device according to the present invention, and FIG. 2 is a route map for explaining the flare phenomenon.
FIG. 3 is a signal waveform diagram for explaining correction of the flare phenomenon. DESCRIPTION OF SYMBOLS 1... Two-dimensional low-pass filter section, 3... Subtraction circuit, 6... Addition circuit, 7... Coefficient unit, 11... Low-pass filter for stationary part, 12... For moving part Low-pass filter, 13... switch circuit, 15... motion detection circuit.

Claims (2)

【特許請求の範囲】[Claims] (1)入力テレビジョン信号を2次元ローパスフィルタ
部を介してその低域成分を抽出し、この低域抽出信号と
原テレビジョン信号とを合成して上記原テレビジョン信
号の中高域成分を強調した出力テレビジョン信号を得る
画質改善装置において、上記入力テレビジョン信号の動
きの有無を検出する動き検出回路と、 動き検出信号に応じて上記2次元ローパスフィルタ部か
ら出力される低域抽出信号の利得を可変する利得可変手
段とを設けたことを特徴とする画質改善装置。
(1) Extract the low-frequency components of the input television signal through a two-dimensional low-pass filter section, combine this low-frequency extracted signal with the original television signal, and emphasize the mid-high frequency components of the original television signal. A picture quality improvement device for obtaining an output television signal, comprising: a motion detection circuit for detecting the presence or absence of motion in the input television signal; and a motion detection circuit for detecting the presence or absence of motion in the input television signal; 1. An image quality improvement device comprising: gain variable means for varying gain.
(2)上記入力テレビジョン信号と上記原テレビジョン
信号とが同一のものであることを特徴とする特許請求の
範囲第1項に記載の画質改善装置。
(2) The image quality improvement device according to claim 1, wherein the input television signal and the original television signal are the same.
JP63075593A 1988-03-29 1988-03-29 Picture quality improvement device Pending JPH01246981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63075593A JPH01246981A (en) 1988-03-29 1988-03-29 Picture quality improvement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63075593A JPH01246981A (en) 1988-03-29 1988-03-29 Picture quality improvement device

Publications (1)

Publication Number Publication Date
JPH01246981A true JPH01246981A (en) 1989-10-02

Family

ID=13580653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63075593A Pending JPH01246981A (en) 1988-03-29 1988-03-29 Picture quality improvement device

Country Status (1)

Country Link
JP (1) JPH01246981A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276887A (en) * 1985-09-30 1987-04-08 Hitachi Ltd Signal processing circuit
JPS6346880A (en) * 1986-08-14 1988-02-27 Nec Corp Picture emphasizing circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276887A (en) * 1985-09-30 1987-04-08 Hitachi Ltd Signal processing circuit
JPS6346880A (en) * 1986-08-14 1988-02-27 Nec Corp Picture emphasizing circuit

Similar Documents

Publication Publication Date Title
EP0868089B1 (en) An image processing system
EP1924097A1 (en) Motion and scene change detection using color components
JPH042278A (en) Movement detection circuit and hand blur correction device
JP2007208399A (en) Image processing unit, image processing method, program thereof, and recording medium for recording the same
WO1994024830A1 (en) Screen filtering boundary detection for image compositing
US7106386B2 (en) Device and method for improving picture quality
JPH06507776A (en) video enhancer
JPH1051795A (en) Image synthesis circuit
JPH06327030A (en) Motion detecting circuit
JPS6245285A (en) Video signal processing circuit
JP2751447B2 (en) Noise reduction device
JPH01246981A (en) Picture quality improvement device
JPH01215185A (en) Contour compensation circuit
JPH11155108A (en) Video signal processor and processing method and video camera using the same
US7227579B2 (en) Light modulation remover
KR930008182B1 (en) Motion signal detecting circuit
JP2935389B2 (en) Video signal processing device and nonlinear signal processing device
US4979024A (en) Vertical contour enhancement suppression circuit
KR940006179B1 (en) Method and appatatus for detecting moving picture for tv receiver
JPH10294892A (en) Solid-state image pickup device
JPH01176188A (en) Moving adaptive type luminance signal chrominance signal separator
JPH05244462A (en) Video signal processor
JPH02222376A (en) Video camera
JPH04159869A (en) Noise reduction circuit
JPH0314388A (en) Movement adaptive type brightness signal/chrominance signal separating device