JPS58212286A - Circuit for detecting dynamic pal signal - Google Patents
Circuit for detecting dynamic pal signalInfo
- Publication number
- JPS58212286A JPS58212286A JP58092365A JP9236583A JPS58212286A JP S58212286 A JPS58212286 A JP S58212286A JP 58092365 A JP58092365 A JP 58092365A JP 9236583 A JP9236583 A JP 9236583A JP S58212286 A JPS58212286 A JP S58212286A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- frame
- difference
- component
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Color Television Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はＰＡＬ方式カラーテレビ信号から被写体の動き
情報を抽出する新規の動き検出回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a novel motion detection circuit that extracts motion information of a subject from a PAL color television signal.
ＰＡＬ方式カラーテレビ信号の副搬送波周波数ｆ、ｅは
水平走査周波数ｆ、に対して
の関係にある。そのため、■フレーム周期すなわち６２
５１（（ｆ（は水平走査周期）前の走査線とは副搬送波
位相が９０ 異なっている。The subcarrier frequencies f and e of the PAL color television signal have a relationship with the horizontal scanning frequency f. Therefore, ■ frame period, that is, 62
51 ((f (horizontal scanning period)) The subcarrier phase differs from the previous scanning line by 90 degrees.
被写体の動き情報を抽出するため、ＰＡＬ方式カラーテ
レビ信号のフレーム間差信号を利用しようとすると、こ
の信号には不要な色信号成分が含まれる。このため従来
公凡の装置では１フレーム前のＰＡＬカラーテレビ信号
をＹＣ分離し、搬送色信号Ｃの位相を９０ずらし現カラ
ーＴＶ信号に合わせる処理を施こして輝度信号Ｙに加算
して搬送色信号位相が一致した擬似ＰＡＬカラーテレビ
信号を作成し、現在の信号とこの信号との差から被写体
の動き情報を抽出していた。この方式ではＹＣ’分離、
Ｃ信号の９０ 位相調整などの処理のため信号が歪み、
正しい動き情報の抽出が困難であった。If an attempt is made to use the interframe difference signal of a PAL color television signal in order to extract motion information of a subject, this signal will contain unnecessary color signal components. For this reason, in conventional devices, the PAL color TV signal of one frame before is separated into Y and C, the phase of the carrier color signal C is shifted by 90 degrees to match the current color TV signal, and the signal is added to the luminance signal Y to produce the carrier color signal. A pseudo PAL color television signal with matching signal phases was created, and object movement information was extracted from the difference between the current signal and this signal. In this method, YC' separation,
90 of the C signal The signal is distorted due to processing such as phase adjustment,
It was difficult to extract correct motion information.
本発明は上述した従来回帖の問題点を除去し、正しい動
き情報が抽出できる新規の動き情報抽出回路を提供する
ことを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a new motion information extraction circuit that can eliminate the problems of the conventional circuit described above and extract correct motion information.
上記目的を達成するため、本発明の動き情報抽出回路で
は、標本化周波数をｆ の４倍に選び、かつその位相ｆ
ｕ酸成分対して４５ ．１３５ 。In order to achieve the above object, the motion information extraction circuit of the present invention selects the sampling frequency to be four times f and its phase f
45 for the u acid component. 135.
２２５ ．３１５ に設定する。225. Set to 315.
まず実施例を説明する前にＰ Ａ Ｌ方式の搬送色信号
について説明する。First, before explaining embodiments, a carrier color signal of the PAL system will be explained.
ＰＡＬ方式では搬送色（ｉｔ号Ｃは２種の色差成分Ｕ、
Ｖを
Ｃ＝Ｕｓｉｎ（２πｆ ｔ）＊Ｖｃｏｓ（２ｆｆｆ
ｔ）：：：）
の関係で変調したものであり、■成分は走査線ととに極
性が反転されて変調されている。第１図は第Ｕ走査巌と
１フレーム前の同一走査線すなわち第（Ｊ−６２５）走
査線と１フレーム後の同一走査線すなわち第（Ｊ＋６２
５）走査線の搬送色信号の位相を示す。ｍｌ走査線は１
フレーム前の第（ｊ−６２５）走査線に対してＵ成分（
・、■印）は９０ 遅れ、■成分は９０ 進んでいる。In the PAL system, the transport color (it number C is two types of color difference components U,
V as C=Usin(2πf t)*Vcos(2fff
t):::), and the (2) component is modulated with its polarity inverted between the scanning line and the scanning line. Figure 1 shows the U-th scanning line, the same scanning line one frame before, that is, the (J-625th) scanning line, and the same scanning line one frame later, that is, the (J+62nd) scanning line.
5) Indicates the phase of the color signal carried by the scanning line. ml scan line is 1
The U component (
・, ■ mark) is behind by 90, and ■ component is ahead by 90.
図中に矢印で示すように、現在の走査Ｉ＃Ａｊにおいて
Ｕの位相に対して４５ ．２２５ 進んだ位相の成分
と１フレーム前の第（ｔ−６２ｓ ）走査−の４５ 。As shown by the arrow in the figure, 45 . 225 Component of advanced phase and 45 of the (t-62s)th scan one frame before.
２２５ 遅れた位相成分（すなわち３１５ ．１３５゜
の位相成分）とは同一信号となっている。したがって、
ＰＡＬカラーテレビ信号をｆ の４倍でかつ標本化位相
がＵ成分に対して４５ ．１３５ 。The phase component delayed by 225 degrees (that is, the phase component of 315.135 degrees) is the same signal. therefore,
PAL color television signal is 4 times f and the sampling phase is 45. 135.
２２５ ．３１５ となるように選んで標本化すれば
、そのうち４５ ．２２５ の位相の標本値は１フレ
ーム前の走査線の同一標本値と正しく一致しており、か
つその搬送色信号レベルも等しい。したがってそのフレ
ー、ム間差信号は正しい動き情報１：、：
信号となっている。225. If we select and sample 315, 45. The sample value of phase 225 correctly matches the same sample value of the scanning line one frame before, and the carrier color signal level thereof is also the same. Therefore, the frame-to-frame difference signal is the correct motion information 1:,: signal.
第２図は本発明の動き情報抽出回路の実施例の構成を示
す。同図（ａ）において、入力端子１に入力されたＰ
Ａ Ｌ方式カラーテレビ信号は標本化回路２において、
Ｕ成分に対して４５ ．１３５ 。FIG. 2 shows the configuration of an embodiment of the motion information extraction circuit of the present invention. In the same figure (a), P input to input terminal 1
The AL color television signal is processed by the sampling circuit 2.
45 for the U component. 135.
２２５ ．３１５ の位相のくり返し周波数４ｆ、。225. 315 phase repetition frequency 4f.
の信号で標本化される。この信号はフレームメモリ３に
入力され、かつその出力（１フレーム前の信号）との差
が減算回路４で算出される。減算回路４の出力のうち、
現在の走査線のＵ成分に対してに対して４５ および２
２５ の位相の信号のみを切換回＠５で選べば出力端子
６に動′＠情報のみから成るフレーム間差信号を漫ろ〇
第２図（ｂ）は本発明の他の実施例で、フレームメモリ
の容−１を半減させた構成ｆｉｌを示す。すなわち入力
端子７に入力されたＰλ１ｊカラーテレビ信号は標本化
回路８で標本化され、切損間ｗＪ９でＵ成分に対し４５
．２２５ の標本値と１３５ 。is sampled by the signal. This signal is input to the frame memory 3, and the difference between it and its output (signal from one frame before) is calculated by the subtraction circuit 4. Of the outputs of the subtraction circuit 4,
45 and 2 for the U component of the current scanline
If only a signal with a phase of 25 is selected in the switching circuit @5, an inter-frame difference signal consisting only of dynamic information is sent to the output terminal 6. Figure 2(b) shows another embodiment of the present invention. A configuration file in which the memory capacity -1 is halved is shown. That is, the Pλ1j color television signal input to the input terminal 7 is sampled by the sampling circuit 8, and the U component is
．． Sample value of 225 and 135.
３１５ の標本値の２系統に分離し、後者の標本値をフ
レームメモリ１０に配憶する。減算回路１１はくり返し
２ｆ、。の周波数で動作し、４５ 。315 sample values are separated into two systems, and the latter sample value is stored in the frame memory 10. The subtraction circuit 11 repeats 2f. It operates at a frequency of 45.
２２５ の標本値と１フレームメモリ前の１３５ 。Sample value of 225 and 135 one frame memory ago.
３１５ の標本１直とを減算することにより、出力
端子１２には同図（ａ）の端子６と同じフレーム差信号
が得られる。By subtracting 315 samples from 1, the same frame difference signal as that at terminal 6 in FIG. 3(a) is obtained at output terminal 12.
以上の説明では１フレ一ム周期前の信号との差から動き
情報を抽出する場合について述べたが、ｌフレーム後の
信号との差から動′＃、情報を抽出する（すなわち、第
１図で（ｊ＋６２ｓ）走査線の動＠１１＃報を抽出する
には、Ｕに対して１３５ ＊３１５ の標本値を利
用し、１フレーム後の４５ 。In the above explanation, we have described the case where motion information is extracted from the difference with the signal one frame period before, but the motion information is extracted from the difference with the signal one frame later (i.e., Fig. 1 To extract the motion @11# information of the (j+62s) scanning line, use 135 * 315 sample values for U, and 45 after one frame.
２２５ の標本値との差をとればよいことは明らかであ
る。It is clear that it is sufficient to take the difference from the sample value of 225.
また１フレーム前との差の代りに１フイールド前あるい
は１フイールド後の３１３Ｈ周期離れた画像上隣接した
走査線間でも同様に差信号が算出でき、動き情報として
利用可能である。Furthermore, instead of the difference from one frame before, a difference signal can be similarly calculated between adjacent scanning lines on the image separated by 313H periods one field before or after one field, and can be used as motion information.
以上詳述したように本発明の動き検出回路ではＹＣ分離
回路等を用いず、複合カラーテレビ信号そのもののフレ
ーム差をとっているため、１０分離などに起因する劣化
、歪のために色信号成分が漏れこみ静止した部分に偽の
動き情報が生じることがなく、高品質の動き情報が抽出
できる。As detailed above, the motion detection circuit of the present invention does not use a YC separation circuit or the like and takes the frame difference of the composite color television signal itself. High-quality motion information can be extracted without leaking in and creating false motion information in stationary parts.
したがって、本発明回路は動き情＠を利用する各種画像
機器すなわちフレーム間符号化装置、雑音除去装置など
のパラメータ制御に用いて大きな効果を発揮する本ので
ある。Therefore, the circuit of the present invention can be used to great effect in controlling parameters of various image devices that utilize motion information, such as interframe coding devices and noise removal devices.
第１図は本発明の原理動作の説明図、第２図は本発明の
実施例の構成を示す〇
■、７・・・入力端子、２．８・・・標本化回路、３゜
１０・・・フレームメモＩハ ４，１１・・・減算回路
、５゜９・・・切損回路、６．１２・・・切損回路。
猶 Ｉ 図
第２図
（（ｊ）
（ｂ：、。
４９７一Fig. 1 is an explanatory diagram of the principle operation of the present invention, and Fig. 2 shows the configuration of an embodiment of the present invention. ...Frame memo Ic 4,11...Subtraction circuit, 5゜9...Breaking circuit, 6.12...Breaking circuit. Figure 2 ((j) (b:,. 497-1)
Claims (1)
ビ信号被写体の動き情報を抽出する回路において、搬送
色信号のＵ成分に対し４５°。 ２２５°（あるいは１３５°、３１５° ）の位相で該
ＰＡＬカラーテレビ信号を標本化し、１フレ一ム周期（
６２５Ｈ，Ｈ：水平走査周期）前（あるいは後）または
１フイ一ルド周期（３１３Ｈ）後（あるいは前）のＵに
対し１３５°、３１５°（あるいは４５ ．２２５
）の標本値との差信号から動き情報を抽出することを特
徴とするＰＡＬ信号の動き検出回路。[Scope of Claims] 1. In a circuit for extracting movement information of a PAL color television signal subject having 625 scanning lines, the angle is 45° with respect to the U component of the carrier color signal. The PAL color television signal is sampled at a phase of 225° (or 135°, 315°), and one frame period (
625H, H: 135°, 315° (or 45.225
) A motion detection circuit for a PAL signal is characterized in that motion information is extracted from a difference signal between a sample value and a sample value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58092365A JPS58212286A (en) | 1983-05-27 | 1983-05-27 | Circuit for detecting dynamic pal signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58092365A JPS58212286A (en) | 1983-05-27 | 1983-05-27 | Circuit for detecting dynamic pal signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58212286A true JPS58212286A (en) | 1983-12-09 |
Family
ID=14052384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58092365A Pending JPS58212286A (en) | 1983-05-27 | 1983-05-27 | Circuit for detecting dynamic pal signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58212286A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5375726A (en) * | 1976-12-16 | 1978-07-05 | Nec Corp | Coder for color television signal |
-
1983
- 1983-05-27 JP JP58092365A patent/JPS58212286A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5375726A (en) * | 1976-12-16 | 1978-07-05 | Nec Corp | Coder for color television signal |
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