JPH07143454A - High definition television receiver - Google Patents

High definition television receiver

Info

Publication number
JPH07143454A
JPH07143454A JP5285024A JP28502493A JPH07143454A JP H07143454 A JPH07143454 A JP H07143454A JP 5285024 A JP5285024 A JP 5285024A JP 28502493 A JP28502493 A JP 28502493A JP H07143454 A JPH07143454 A JP H07143454A
Authority
JP
Japan
Prior art keywords
signal
circuit
motion
output
motion vector
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
JP5285024A
Other languages
Japanese (ja)
Inventor
Yasuhiko Muto
靖彦 武藤
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.)
Toshiba Corp
Toshiba AVE Co Ltd
Original Assignee
Toshiba Corp
Toshiba AVE 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 Toshiba Corp, Toshiba AVE Co Ltd filed Critical Toshiba Corp
Priority to JP5285024A priority Critical patent/JPH07143454A/en
Publication of JPH07143454A publication Critical patent/JPH07143454A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To suppress deterioration in picture quality by suppressing a false edge when a motion vector is corrected. CONSTITUTION:A MUSE signal is given to a control signal separate circuit 2, in which the signal is separated into video information X1 and a motion vector correction signal X2 included in a control signal, and the video information X1 is fed to a still area interpolation circuit 3, a motion area interpolation circuit 4, a motion area detection circuit 5 and a vertical enhancer 7. A signal X3 subjected to still picture processing and a signal X4 subjected to motion picture processing are fed to a mixer circuit 6, in which the ratio of mixture of the signals X3, X4 is controlled based on a motion detection signal X5 to obtain an output signal X6. A low frequency replacement circuit 9 replaces a low frequency component of the signal X6 into a low frequency component of a signal X7 to obtain an output signal X8. An enhance quantity adjustment circuit 11 controls the vertical enhancer 7 when the motion vector correction signal X2 is in existence to adjust the enhance quantity thereby degrading the frequency characteristic of the picture subjected to low frequency replacement.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、帯域圧縮されたテレ
ビジョン信号を元の広帯域な高品位テレビジョン信号に
復調する高品位テレビジョン受信機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-definition television receiver for demodulating a band-compressed television signal into an original broadband high-definition television signal.

【0002】[0002]

【従来の技術】広帯域な高品位テレビジョン信号を、伝
送上実用的なレベルに帯域圧縮して伝送し、復元する一
方式としてMUSE(Mulitiple Sub-nyquist Sampling
Encoding) 方式が開発されている(特開昭61−264
889号)。
2. Description of the Related Art MUSE (Mulitiple Sub-nyquist Sampling) is used as a method of compressing and restoring a wide band high-definition television signal to a practical level for transmission.
Encoding method has been developed (Japanese Patent Laid-Open No. 61-264).
889).

【0003】MUSE方式においては、カメラがパンニ
ングしている場合など、一定速度の一定動きの場合、フ
ィールド内内挿処理が行われ画像のぼけが若干目立つ。
また内挿処理を行うに際して、動画領域と静画領域の判
断の間違いに起因して偽信号が発生する。
In the MUSE method, when the camera is panning, or when the camera moves at a constant speed, field interpolation is performed and the image is slightly blurred.
In addition, when performing the interpolation process, a false signal is generated due to a mistaken determination of the moving image area and the still image area.

【0004】このような画質劣化要因を防ぐ方法とし
て、動き補正処理が導入されている。エンコーダ側で
は、画像の動きベクトルを検出して、これをデコーダ側
にデジタル信号の形で伝送し、内挿処理時に、前フレー
ムの信号を使うべきタイミングでは動きベクトルの大き
さだけで位置補正を行い、例え画像が動いてもフレーム
間内挿処理を行うようにしている。
Motion correction processing has been introduced as a method of preventing such image quality deterioration factors. On the encoder side, the motion vector of the image is detected, and this is transmitted to the decoder side in the form of a digital signal, and during interpolation processing, the position correction is performed only by the size of the motion vector at the timing when the signal of the previous frame should be used. Then, even if the image moves, the inter-frame interpolation processing is performed.

【0005】MUSE方式においては、画像を強調する
ためにエンハンス機能がある。エンハンス機能は、画像
の有用性を増すために、画像の情報を選択的に強調した
り、抑制したりする処理である。代表的なものに、画像
のコントラスト強調、孤立雑音や周期雑音の抑制、幾何
学的歪み補正等がある。
In the MUSE system, there is an enhancement function for enhancing the image. The enhancement function is a process of selectively emphasizing or suppressing image information in order to increase the usefulness of the image. Typical examples are image contrast enhancement, suppression of isolated noise and periodic noise, and geometric distortion correction.

【0006】図4は、MUSE信号を元の広帯域な高品
位テレビジョン信号に復調するためのデコーダを示して
いる。入力端子1に導入されたMUSE信号は、コント
ロール信号分離回路2に入力され、映像情報X1と、コ
ントロール信号中に含まれる動きベクトル補正信号X2
とに分離される。映像情報X1は、静止領域補間回路
3、動き領域補間回路4、動き領域検出回路5、垂直エ
ンハンサ7に入力される。静止領域補間回路3では、映
像情報X1と動きベクトル補正信号X2を用いて静画処
理された信号X3を得る。動き領域補間回路4では、映
像情報X1を動画処理した信号X4を得る。信号X3、
X4は混合回路6に供給される。動き領域検出回路5
は、動き検出信号X5を得る。混合回路6では、動き検
出信号X5に基づいて、信号X3、X4の混合割合を制
御して、出力信号X6を得る。信号X6は、低域置換回
路9に供給される。またこの低域置換回路9には、垂直
エンハンサ7の出力信号X7が供給されている。
FIG. 4 shows a decoder for demodulating a MUSE signal into an original wideband high-definition television signal. The MUSE signal introduced to the input terminal 1 is input to the control signal separation circuit 2, and the video information X1 and the motion vector correction signal X2 included in the control signal are input.
And separated. The video information X1 is input to the still area interpolation circuit 3, the motion area interpolation circuit 4, the motion area detection circuit 5, and the vertical enhancer 7. The still area interpolation circuit 3 obtains a still image processed signal X3 using the video information X1 and the motion vector correction signal X2. The motion area interpolation circuit 4 obtains a signal X4 obtained by moving image processing the video information X1. Signal X3,
X4 is supplied to the mixing circuit 6. Motion area detection circuit 5
Obtains the motion detection signal X5. The mixing circuit 6 controls the mixing ratio of the signals X3 and X4 based on the motion detection signal X5 to obtain the output signal X6. The signal X6 is supplied to the low-frequency replacement circuit 9. Further, the output signal X7 of the vertical enhancer 7 is supplied to the low frequency replacing circuit 9.

【0007】低域置換回路9は、信号X6の低域成分を
信号X7の低域成分に置換して出力信号X8を得る。カ
メラがゆっくりパンニングしている時、MUSEデコー
ダでは動きベクトル補正信号に基づき静止領域補間回路
3において、画像全体の動き補正を行っている。この動
きベクトル補正を行っている際、MUSEデコーダを内
蔵する従来のテレビジョン受像機では、インターレース
方式を採用しているために、図5(A)に示すように、
インターレース方式の垂直解像度改善効果がなくなって
しまうように見える。これはまた、移動速度と走査線の
ライン間隔が等しいときが最も目立ち、垂直解像度改善
効果がなくなったように見える。本来、静止画処理して
いる信号がパンニングしていることと、走査線数が少な
くなるように見えることにより、図5(B)に示すよう
に、画像エッジ部分が強調されたように見える。さらに
これに加えて、垂直エンハンス処理が機能しているため
に、偽エッジが一層強調されて見える。
The low band substitution circuit 9 replaces the low band component of the signal X6 with the low band component of the signal X7 to obtain an output signal X8. When the camera is panning slowly, the still image interpolation circuit 3 in the MUSE decoder corrects the motion of the entire image based on the motion vector correction signal. When performing the motion vector correction, the conventional television receiver having the built-in MUSE decoder adopts the interlace system, and therefore, as shown in FIG.
It seems that the interlaced vertical resolution improvement effect has disappeared. This is most noticeable when the moving speed and the line spacing of the scanning lines are equal, and it seems that the vertical resolution improving effect is lost. Originally, the signal for the still image processing is panning and the number of scanning lines seems to be small, so that the image edge portion appears to be emphasized as shown in FIG. 5B. In addition to this, the false edges appear more emphasized due to the functioning of the vertical enhancement process.

【0008】[0008]

【発明が解決しようとする課題】上記したように、MU
SEデコーダを内蔵したインターレース方式のテレビジ
ョン受信機においては、カメラがゆっくりパンニングし
ている時の画像劣化が大きいという問題がある。そこで
この発明は、動きベクトル補正を行っている際、偽エッ
ジの発生を抑え画質劣化を抑圧する高品位テレビジョン
受信機を提供することを目的とする。
As mentioned above, the MU
In an interlaced television receiver with a built-in SE decoder, there is a problem that image deterioration is large when the camera is slowly panning. Therefore, an object of the present invention is to provide a high-definition television receiver that suppresses the occurrence of false edges and suppresses image quality deterioration during motion vector correction.

【0009】[0009]

【課題を解決するための手段】この発明は、MUSE信
号を映像情報と動きベクトル補正信号に分離する分離手
段と、前記映像情報から動き領域検出信号を得る動き領
域検出手段と、前記映像情報を用いて静画処理信号を得
る静画領域補間手段と、前記映像情報を用いて動画処理
信号を得る動画領域補間手段と、前記動き領域検出信号
に基づいて、前記静画処理信号と動作処理信号を混合比
を制御されて混合出力を得る混合手段と、前記映像情報
を用いて周波数特性を改善したエンハンス信号を得る垂
直エンハンサと、前記混合出力の低域成分を前記エンハ
ンス信号にて置換する置換手段と、前記動きベクトル補
正信号を積分して前記垂直エンハンサのエンハンス量を
調整するエンハンス量調整手段とを備えるものである。
According to the present invention, there is provided a separation means for separating a MUSE signal into video information and a motion vector correction signal, a motion area detection means for obtaining a motion area detection signal from the video information, and the video information. Still image area interpolating means for obtaining a still image processing signal using the moving image area interpolating means for obtaining a moving image processing signal using the video information, and the still image processing signal and motion processing signal based on the moving area detection signal. Mixing means for controlling a mixing ratio to obtain a mixed output, a vertical enhancer for obtaining an enhanced signal with improved frequency characteristics using the video information, and a replacement for replacing a low frequency component of the mixed output with the enhanced signal Means and means for adjusting the amount of enhancement of the vertical enhancer by integrating the motion vector correction signal.

【0010】[0010]

【作用】上記の手段により、垂直エンハンサのエンハン
ス量が、動きベクトル補正信号により抑圧、つまりパン
ニング等の動きベクトル補正を行っているときは不要な
エッジ強調が行われないようになる。
By the above means, the edge enhancer is prevented from performing unnecessary edge enhancement when the enhancement amount of the vertical enhancer is suppressed by the motion vector correction signal, that is, when motion vector correction such as panning is being performed.

【0011】[0011]

【実施例】以下、この発明の実施例を図面を参照して説
明する。図1はこの発明の一実施例である。先に説明し
た図4の回路と異なる部分は、動きベクトル補正信号X
2が供給されるエンハンス量調整回路11が新たに設け
られ、この調整回路11の出力が、垂直エンハンサ7の
制御端子に供給されている点である。その他の部分は、
図4の回路と同じであるから、同一符号を付している。
エンハンス量調整回路11は、動きベクトル補正信号X
2が存在するときは、垂直エンハンサ7を制御して、エ
ンハンス量を調整する。つまり低域置換する画像の周波
数特性を落とす。これにより、動きベクトル補正を行っ
ている際、偽エッジの発生を抑え画質劣化を抑圧するも
のである。入力端子1に導入されたMUSE信号は、コ
ントロール信号分離回路2に入力され、映像情報X1
と、コントロール信号中に含まれる動きベクトル補正信
号X2とに分離される。映像情報X1は、静止領域補間
回路3、動き領域補間回路4、動き領域検出回路5、垂
直エンハンサ7に入力される。静止領域補間回路3で
は、映像情報X1と動きベクトル補正信号X2を用いて
静画処理された信号X3を得る。動き領域補間回路4で
は、映像情報X1を動画処理した信号X4を得る。信号
X3、X4は混合回路6に供給される。動き領域検出回
路5は、動き検出信号X5を得る。混合回路6では、動
き検出信号X5に基づいて、信号X3、X4の混合割合
を制御して、出力信号X6を得る。信号X6は、低域置
換回路9に供給される。またこの低域置換回路9には、
垂直エンハンサ7の出力信号X7が供給されている。低
域置換回路9は、信号X6の低域成分を信号X7の低域
成分に置換して出力信号X8を得る。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. The difference from the circuit of FIG. 4 described above is that the motion vector correction signal X
The point is that an enhancement amount adjusting circuit 11 to which 2 is supplied is newly provided, and the output of this adjusting circuit 11 is supplied to the control terminal of the vertical enhancer 7. The other parts are
Since it is the same as the circuit of FIG. 4, the same reference numerals are given.
The enhancement amount adjustment circuit 11 uses the motion vector correction signal X
When 2 is present, the vertical enhancer 7 is controlled to adjust the amount of enhancement. That is, the frequency characteristic of the image to be low-pass replaced is degraded. As a result, it is possible to suppress the occurrence of false edges and suppress image quality deterioration during motion vector correction. The MUSE signal introduced to the input terminal 1 is input to the control signal separation circuit 2 and the video information X1
And the motion vector correction signal X2 included in the control signal. The video information X1 is input to the still area interpolation circuit 3, the motion area interpolation circuit 4, the motion area detection circuit 5, and the vertical enhancer 7. The still area interpolation circuit 3 obtains a still image processed signal X3 using the video information X1 and the motion vector correction signal X2. The motion area interpolation circuit 4 obtains a signal X4 obtained by moving image processing the video information X1. The signals X3 and X4 are supplied to the mixing circuit 6. The motion area detection circuit 5 obtains a motion detection signal X5. The mixing circuit 6 controls the mixing ratio of the signals X3 and X4 based on the motion detection signal X5 to obtain the output signal X6. The signal X6 is supplied to the low-frequency replacement circuit 9. In addition, the low-frequency replacement circuit 9 includes
The output signal X7 of the vertical enhancer 7 is supplied. The low-frequency replacement circuit 9 replaces the low-frequency component of the signal X6 with the low-frequency component of the signal X7 to obtain the output signal X8.

【0012】図2は、エンハンス量調整回路11の具体
的構成例である。動きベクトル信号X2は、1水平期間
の遅延量を有する1H遅延回路20に供給されるととも
に、加算器22に供給される。1H遅延回路20の出力
は、同じく1H遅延回路21、加算器23、加算器25
に入力される。1H遅延回路21の出力は、加算器22
に入力される。加算器22の出力は加算器23に入力さ
れる。加算器23の出力は、係数器24に入力されて係
数倍され加算器25に入力されている。係数器24の係
数は制御端子26から与えられる。
FIG. 2 shows a specific configuration example of the enhancement amount adjusting circuit 11. The motion vector signal X2 is supplied to the 1H delay circuit 20 having a delay amount of one horizontal period and the adder 22. The output of the 1H delay circuit 20 is the same as the 1H delay circuit 21, the adder 23, and the adder 25.
Entered in. The output of the 1H delay circuit 21 is the adder 22.
Entered in. The output of the adder 22 is input to the adder 23. The output of the adder 23 is input to the coefficient unit 24, multiplied by the coefficient, and input to the adder 25. The coefficient of the coefficient multiplier 24 is given from the control terminal 26.

【0013】通常は、垂直エンハンサ7から出力される
信号X7は、動きベクトル補正信号X2の大きさに比例
した信号、反比例した信号、n次関数倍した信号、さら
には動きベクトル信号X2がある大きさになると零ある
いは最大になる信号が考えられる。動きベクトル補正信
号X2は、不規則に変化する信号である。従って、エン
ハンス量調整回路11により、動きベクトル信号を積分
し、この積分出力により垂直エンハンス量を制御するこ
とになる。
Normally, the signal X7 output from the vertical enhancer 7 is a signal proportional to the magnitude of the motion vector correction signal X2, an inversely proportional signal, a signal obtained by multiplying by an nth function, and a magnitude of the motion vector signal X2. Then, a signal that is zero or maximum can be considered. The motion vector correction signal X2 is a signal that changes irregularly. Therefore, the enhancement amount adjusting circuit 11 integrates the motion vector signal and controls the vertical enhancement amount by the integrated output.

【0014】図3にはエンハンス量調整回路11の各部
の信号波形例を示している。1H遅延回路20、21を
用いることによりライン間の動き量が積分され、さらに
係数を設定することによりエンハンス量も調整できる。
このような動作により、画面上の斜め線画像にエッジビ
ジネスが目立つようなことがなくなり、画像品質が損な
われない。
FIG. 3 shows an example of the signal waveform of each part of the enhancement amount adjusting circuit 11. By using the 1H delay circuits 20 and 21, the movement amount between lines is integrated, and the enhancement amount can be adjusted by setting a coefficient.
By such an operation, the edge business is not conspicuous in the diagonal line image on the screen, and the image quality is not deteriorated.

【0015】[0015]

【発明の効果】以上説明したようにこの発明によれば、
動きベクトル補正を行っている際、偽エッジの発生及び
エッジ強調を抑え画質劣化を抑圧することができる。
As described above, according to the present invention,
When motion vector correction is performed, it is possible to suppress the occurrence of false edges and edge enhancement, and suppress image quality deterioration.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例を示す図。FIG. 1 is a diagram showing an embodiment of the present invention.

【図2】図1のエンハンス量調整回路の具体例を示す
図。
FIG. 2 is a diagram showing a specific example of the enhancement amount adjustment circuit of FIG.

【図3】図2の回路の各部信号波形例を示す図。FIG. 3 is a diagram showing an example of signal waveforms of respective parts of the circuit of FIG.

【図4】従来のMUSEデコーダを示す図。FIG. 4 is a diagram showing a conventional MUSE decoder.

【図5】従来のデコーダにおいてエッジビジネスが生じ
る原理説明図。
FIG. 5 is an explanatory diagram of a principle in which an edge business occurs in a conventional decoder.

【符号の説明】[Explanation of symbols]

2…コントロール信号分離回路、3…静止領域補間回
路、4…動き領域補間回路、5…動き領域検出回路、6
…混合回路、7…垂直エンハンサ、9…低域置換回路、
11…エンハンス量調整回路。
2 ... Control signal separation circuit, 3 ... Still area interpolation circuit, 4 ... Motion area interpolation circuit, 5 ... Motion area detection circuit, 6
... Mixing circuit, 7 ... Vertical enhancer, 9 ... Low-frequency replacement circuit,
11 ... Enhancement amount adjustment circuit.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】MUSE信号を映像情報と動きベクトル補
正信号に分離する分離手段と、 前記映像情報から動き領域検出信号を得る動き領域検出
手段と、 前記映像情報を用いて静画処理信号を得る静画領域補間
手段と、 前記映像情報を用いて動画処理信号を得る動画領域補間
手段と、 前記動き領域検出信号に基づいて、前記静画処理信号と
動作処理信号を混合比を制御されて混合出力を得る混合
手段と、 前記映像情報を用いて周波数特性を改善したエンハンス
信号を得る垂直エンハンサと、 前記混合出力の低域成分を前記エンハンス信号にて置換
する置換手段と、 前記動きベクトル補正信号を積分して前記垂直エンハン
サのエンハンス量を調整するエンハンス量調整手段とを
具備したことを特徴とする高品位テレビジョン受信機。
1. A separation means for separating a MUSE signal into video information and a motion vector correction signal, a motion area detection means for obtaining a motion area detection signal from the video information, and a still image processing signal using the video information. Still image area interpolating means, moving image area interpolating means for obtaining a moving image processing signal using the image information, and mixing of the still image processing signal and the motion processing signal on the basis of the moving area detection signal with a mixing ratio controlled. Mixing means for obtaining an output, a vertical enhancer for obtaining an enhanced signal with improved frequency characteristics using the video information, replacing means for replacing the low frequency component of the mixed output with the enhance signal, the motion vector correction signal A high-definition television receiver, comprising: an enhancement amount adjusting means for integrating the above to adjust the enhancement amount of the vertical enhancer.
【請求項2】前記エンハンス量調整手段は、入力動きベ
クトル補正信号を1水平期間ずつ順次遅延する第1、第
2の遅延手段と、 前記第2の遅延手段と前記入力動きベクトル補正信号を
加算して1/2する加算手段と、 前記加算手段の出力を前記第1の遅延手段の出力から減
算する減算手段と、 前記減算手段の出力を係数倍する係数器と、 前記係数器の出力と前記第1の遅延手段の出力とを加算
する加算手段とを具備しことを特徴とする請求項1記載
の高品位テレビジョン受信機。
2. The enhancement amount adjusting means adds first and second delay means for sequentially delaying the input motion vector correction signal by one horizontal period, and the second delay means and the input motion vector correction signal. And subtracting means for subtracting the output of the adding means from the output of the first delay means, a coefficient multiplier for multiplying the output of the subtracting means by a coefficient, and an output of the coefficient multiplier. The high-definition television receiver according to claim 1, further comprising: an addition unit that adds the output of the first delay unit.
JP5285024A 1993-11-15 1993-11-15 High definition television receiver Pending JPH07143454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5285024A JPH07143454A (en) 1993-11-15 1993-11-15 High definition television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5285024A JPH07143454A (en) 1993-11-15 1993-11-15 High definition television receiver

Publications (1)

Publication Number Publication Date
JPH07143454A true JPH07143454A (en) 1995-06-02

Family

ID=17686173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5285024A Pending JPH07143454A (en) 1993-11-15 1993-11-15 High definition television receiver

Country Status (1)

Country Link
JP (1) JPH07143454A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001082590A3 (en) * 2000-04-27 2002-04-25 Digital Reflection Inc Method and system for improving the processing of video signals for use with a microdisplay based video projection system
EP1686811A1 (en) * 2005-01-27 2006-08-02 Canon Kabushiki Kaisha Image processing apparatus and its method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001082590A3 (en) * 2000-04-27 2002-04-25 Digital Reflection Inc Method and system for improving the processing of video signals for use with a microdisplay based video projection system
EP1686811A1 (en) * 2005-01-27 2006-08-02 Canon Kabushiki Kaisha Image processing apparatus and its method
US7630020B2 (en) 2005-01-27 2009-12-08 Canon Kabushiki Kaisha Image processing apparatus and its method

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