JPH0353080U - - Google Patents
Info
- Publication number
- JPH0353080U JPH0353080U JP11445689U JP11445689U JPH0353080U JP H0353080 U JPH0353080 U JP H0353080U JP 11445689 U JP11445689 U JP 11445689U JP 11445689 U JP11445689 U JP 11445689U JP H0353080 U JPH0353080 U JP H0353080U
- Authority
- JP
- Japan
- Prior art keywords
- ghost
- evaluation value
- amplitude ratio
- wave
- 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.)
- Granted
Links
- 238000011156 evaluation Methods 0.000 claims description 8
- 238000012935 Averaging Methods 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Description
第１図は、この考案のゴースト評価値表示装置
を適用したゴースト除去装置の一実施例を示す概
略構成図、第２，３図は、それぞれ第１図に示し
た中央処理装置の演算動作を説明するためのフロ
ーチヤート及び信号波形図、第４，５図は、それ
ぞれ視覚特性フイルタを構成するウインドウ・フ
イルタとローパス・フイルタの各フイルタ特性を
示す図、第６図Ａ，Ｂは、それぞれゴースト除去
用基準信号の一例を示す波形図、第７，８図は、
それぞれゴースト除去装置を適用した従来のテレ
ビジヨン受像機の一例を示す概略構成図及び要部
回路構成図、第９図は、第７図に示したテレビジ
ヨン受像機の正面図である。
２１……ゴースト除去装置、２４……近接ゴー
スト除去回路、２５……通常ゴースト除去回路、
２６，２７，２８……バツフアメモリ、２９……
中央処理装置、３２……ゴースト評価値表示装置
、３３……オンスクリーン表示回路。
FIG. 1 is a schematic configuration diagram showing an embodiment of a ghost removal device to which the ghost evaluation value display device of this invention is applied, and FIGS. 2 and 3 show the calculation operations of the central processing unit shown in FIG. 1, respectively. Flowcharts and signal waveform diagrams for explanation; FIGS. 4 and 5 are diagrams showing the filter characteristics of the window filter and low-pass filter that constitute the visual characteristic filter; FIGS. 6A and B are diagrams showing the ghost filter characteristics, respectively. Waveform diagrams 7 and 8 showing an example of the reference signal for removal are as follows:
FIG. 9 is a schematic configuration diagram and an essential circuit configuration diagram showing an example of a conventional television receiver to which a ghost removal device is applied, and FIG. 9 is a front view of the television receiver shown in FIG. 7. 21...Ghost removal device, 24...Proximity ghost removal circuit, 25...Normal ghost removal circuit,
26, 27, 28... Buffer memory, 29...
Central processing unit, 32... Ghost evaluation value display device, 33... On-screen display circuit.
Claims (1)
するゴースト除去用基準信号を抽出し、一定の評
価基準に従つて定量化したゴースト評価値を視覚
表示するゴースト評価値表示装置であつて、ゴー
スト波によつて歪んだゴースト除去用基準信号を
時間微分する微分手段と、この微分手段の微分出
力について、希望波に対するゴースト波の振幅比
と希望波に対するゴースト波の平均振幅比とを求
め、得られた振幅比と平均振幅比を、受信テレビ
ジヨン信号の信号対ノイズ比に応じて加重平均し
、ゴースト評価値を求めるゴースト評価手段とを
具備することを特徴とするゴースト評価値表示装
置。 This is a ghost evaluation value display device that extracts a reference signal for ghost removal superimposed on the vertical blanking period from a received television signal and visually displays a ghost evaluation value quantified according to a certain evaluation standard. The amplitude ratio of the ghost wave to the desired wave and the average amplitude ratio of the ghost wave to the desired wave are determined for the differentiating means for time-differentiating the distorted reference signal for ghost removal and the differential output of this differentiating means. 1. A ghost evaluation value display device comprising ghost evaluation means for calculating a ghost evaluation value by averaging the amplitude ratio and the average amplitude ratio in a weighted manner according to the signal-to-noise ratio of a received television signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11445689U JP2504240Y2 (en) | 1989-09-29 | 1989-09-29 | Ghost evaluation value display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11445689U JP2504240Y2 (en) | 1989-09-29 | 1989-09-29 | Ghost evaluation value display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0353080U true JPH0353080U (en) | 1991-05-22 |
| JP2504240Y2 JP2504240Y2 (en) | 1996-07-10 |
Family
ID=31662824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11445689U Expired - Lifetime JP2504240Y2 (en) | 1989-09-29 | 1989-09-29 | Ghost evaluation value display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2504240Y2 (en) |
-
1989
- 1989-09-29 JP JP11445689U patent/JP2504240Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2504240Y2 (en) | 1996-07-10 |
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