JPH0524716B2 - - Google Patents
Info
- Publication number
- JPH0524716B2 JPH0524716B2 JP63320513A JP32051388A JPH0524716B2 JP H0524716 B2 JPH0524716 B2 JP H0524716B2 JP 63320513 A JP63320513 A JP 63320513A JP 32051388 A JP32051388 A JP 32051388A JP H0524716 B2 JPH0524716 B2 JP H0524716B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- band
- motion
- circuit
- motion detection
- 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.)
- Expired - Lifetime
Links
- 230000033001 locomotion Effects 0.000 claims description 62
- 238000001514 detection method Methods 0.000 claims description 46
- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 9
- 230000006866 deterioration Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は映像信号の帯域圧縮伝送方式に係
り、特に動き検出手段を有するHD（High
Definition）TVやED（Extended Definition）
TVの伝送装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a band compression transmission method for video signals, and in particular to an HD (High
Definition) TV and ED (Extended Definition)
This relates to TV transmission equipment.
（発明の概要）
この発明は、広帯域伝送の静止系回路と狭帯域
伝送の動系回路の両出力を動き検出回路の出力に
応じて混合して伝送する映像信号の帯域圧縮伝送
方式に関するもので、
送信側で入力映像信号の周波数帯域を受信側で
動き検出可能な低周波数帯域と受信側で動き検出
不可能な高周波帯域の２つの帯域に分割し、分割
したそれぞれの帯域に対して画像の動き検出を行
ない、前記低周波数帯域では動きが検出されず、
かつ、前記高周波数帯域では動きが検出された場
合に限つて、静止系統の映像伝送信号の帯域を前
記低周波数帯域に制限している。(Summary of the Invention) The present invention relates to a band compression transmission method for video signals in which the outputs of a stationary circuit for wideband transmission and a dynamic circuit for narrowband transmission are mixed and transmitted according to the output of a motion detection circuit. , The frequency band of the input video signal is divided on the transmitting side into two bands: a low frequency band where motion can be detected on the receiving side and a high frequency band where motion cannot be detected on the receiving side, and the image is divided into two bands for each divided band. motion detection is performed, and no motion is detected in the low frequency band;
Moreover, only when motion is detected in the high frequency band, the band of the static video transmission signal is limited to the low frequency band.
これにより動き検出の対象となる周波数帯域が
送信側と受信側で異なる場合でも受信画像に劣化
の生じないようにしている。 This prevents deterioration of the received image even if the frequency bands targeted for motion detection differ between the transmitting side and the receiving side.
（従来の技術）
従来のこの種の技術は、動き検出を行なう方法
として、伝送すべき映像信号を入力とし、それか
らレベル信号（非線形処理などに起因するレベル
変化情報）、エツジ信号および時間差信号（例え
ば１フレーム間差の絶対値）を生成した上で画像
の静止／動きの判定を行なつていた。以下、具体
的にこれを説明する。(Prior Art) This type of conventional technology uses as an input a video signal to be transmitted as a method for motion detection, and then inputs a level signal (level change information due to nonlinear processing, etc.), an edge signal, and a time difference signal ( For example, the absolute value of the difference between one frame) is generated to determine whether the image is still or moving. This will be explained in detail below.
第３図は従来の動き検出回路の略構成図であ
る。レベル抽出回路１、エツジ抽出回路２、時間
差信号検出回路３はそれぞれレベル信号、エツジ
信号、時間差信号を入力信号ｘから生成する回路
である。それらを用いて判定回路４により動き検
出信号ｋを得る。判定回路４は、たとえば時間差
信号の絶対値をレベル信号に応じた感度でエツジ
信号で除算する回路である。 FIG. 3 is a schematic diagram of a conventional motion detection circuit. The level extraction circuit 1, the edge extraction circuit 2, and the time difference signal detection circuit 3 are circuits that generate a level signal, an edge signal, and a time difference signal from the input signal x, respectively. Using them, the determination circuit 4 obtains a motion detection signal k. The determination circuit 4 is, for example, a circuit that divides the absolute value of the time difference signal by the edge signal with sensitivity depending on the level signal.
第４図は従来の方法による伝送信号の略処理系
統図である。入路映像信号ｘは静止系回路５と動
系回路６で別々の信号処理（例えばそれぞれ別の
二次元空間周波数フイルタを通す）を行つたあ
と、動き検出信号ｋの制御により混合回路７で混
合され伝送信号が形成される。混合回路７は例え
ば動き検出信号と（０≦ｋ≦１）に関し、動系回
路出力にｋを乗じ静止系回路出力に１−ｋを乗じ
て加算する回路である。 FIG. 4 is a schematic diagram of a transmission signal processing system according to a conventional method. The incoming video signal x undergoes separate signal processing in the static circuit 5 and the dynamic circuit 6 (for example, passing through separate two-dimensional spatial frequency filters), and then is mixed in the mixing circuit 7 under the control of the motion detection signal k. and a transmission signal is formed. The mixing circuit 7 is a circuit that multiplies the output of the dynamic system circuit by k and the output of the stationary system circuit by 1-k and adds the results, regarding the motion detection signal and (0≦k≦1), for example.
（発明が解決しようとする課題）
映像信号を帯域圧縮して伝送する場合、映像の
静止部分は広い空間周波数成分を、動き部分は狭
い空間周波数成分をそれぞれ異なる手段で伝送す
るのが通常である。この場合画像の動き部分と静
止部分を識別する動き検出回路が送信側、受信側
に必要である。(Problem to be Solved by the Invention) When transmitting a video signal after band compression, it is normal to transmit a wide spatial frequency component for a still part of the video and a narrow spatial frequency component for a moving part using different means. . In this case, motion detection circuits that distinguish between moving parts and static parts of an image are required on the transmitting and receiving sides.
動き検出は静止部分の空間周波数帯域に相当す
る広い帯域を対象に行なう必要があるが、受信側
では伝送信号の性質上、動き部分に相当するかあ
るいはそれ以下の狭い帯域だけを対象とした動き
検出を行なうことになる。このため従来の方法を
用いた動き検出では送信側と受信側の動き検出信
号が異なる場合が発生し、受信画像を劣化させて
いた。 Motion detection needs to be performed over a wide band corresponding to the spatial frequency band of a stationary part, but due to the nature of the transmitted signal, on the receiving side, motion detection must be performed only in a narrow band corresponding to or smaller than the moving part. Detection will be performed. For this reason, in motion detection using the conventional method, there are cases where the motion detection signals on the transmitting side and the receiving side are different, which deteriorates the received image.
以下、この事を添付図面を用いて説明する。第
５図は帯域圧縮を行なつて映像信号を伝送する場
合の伝送可能な２次元空間周波数の例を表わした
ものである。０、Ｌ／２、Ｃ、Ａで囲まれた領域
８は動き部分の伝送可能帯域であり、０、Ｌ、
Ｆ、Ｂで囲まれた領域９は静止部分の伝送可能帯
域である。Ａ、Ｂ、Ｆ、Ｅ、の領域は２フレーム
シーケンスなどで多重した部分である。 This will be explained below using the attached drawings. FIG. 5 shows an example of two-dimensional spatial frequencies that can be transmitted when a video signal is transmitted after performing band compression. The region 8 surrounded by 0, L/2, C, and A is the transmission band of the moving part, and 0, L,
The area 9 surrounded by F and B is the transmission band of the stationary part. Areas A, B, F, and E are parts multiplexed with a two-frame sequence or the like.
一般にはインターレースなどにより、第５図に
示したように静止部分と動き部分では伝送可能な
垂直空間周波数も異なるが、以下の説明では簡単
のため水平空間周波数のみに着目し、垂直方向に
は一律に０〜Ｌ／２の範囲を考えるものとする。 In general, due to interlacing, etc., the vertical spatial frequencies that can be transmitted differ between stationary parts and moving parts, as shown in Figure 5, but in the following explanation, we will focus only on horizontal spatial frequencies for the sake of simplicity; Let us consider a range of 0 to L/2.
受信側の動き検出可能な領域が０、Ｌ／２、
CN、ANで囲まれた領域であるとする。この領域
が動き部分の伝送可能領域８より狭い領域となる
のは、帯域AN、CN、Ｃ、Ａ、が例えばNTSCに
おける色副搬送波の重畳など伝送信号への信号多
重からくる制約により動き検出に用いることがで
きないためである。 The motion detectable area on the receiving side is 0, L/2,
Suppose that it is an area surrounded by C N and A N. The reason why this region is narrower than the transmission possible region 8 of the moving part is that the bands A N , C N , C, and A are moving due to constraints caused by signal multiplexing on the transmission signal, such as the superimposition of color subcarriers in NTSC. This is because it cannot be used for detection.
このとき領域AN、CN、Ｄ、Ｂ内だけに動きが
発生した場合、送信側では動きが検出されるが、
受信側では検出されない。この場合は、実際は動
き部分として信号が伝送されているにも拘わらず
受信機の動作は静止モードとして動作し、受信画
像の劣化を生ずる。 At this time, if movement occurs only within areas A N , C N , D, and B, the movement will be detected on the transmitting side, but
Not detected on the receiving side. In this case, even though the signal is actually being transmitted as a moving part, the receiver operates in a stationary mode, resulting in deterioration of the received image.
この対策として、送信側も受信側と同じ領域
０、Ｌ／２、CN、ANに帯域を制限した信号を用
いて動き検出を行なう方法が考えられるが、この
方法では領域AN、CN、Ｄ、Ｂ内だけに動きが発
生した場合は、本来動きのある部分を送受とも静
止部分として処理するために受信画像の劣化をき
たす。 As a countermeasure to this problem, a method can be considered in which the transmitting side performs motion detection using a signal whose band is limited to the same areas 0, L/2, C N , and A N as the receiving side, but this method If movement occurs only within N , D, and B, the received image deteriorates because the originally moving parts are treated as static parts in both transmission and reception.
（課題を解決するための手段）
従つて本発明の目的は、前述の欠点を排除し、
動き検出の対象となる周波数帯域が送信側と受信
側で異なる場合でも受信画像の劣化の生じない映
像信号の帯域圧縮伝送方式を提供せんとするもの
である。(Means for Solving the Problems) Therefore, it is an object of the present invention to eliminate the above-mentioned drawbacks,
It is an object of the present invention to provide a band compression transmission system for video signals that does not cause deterioration of received images even when the frequency bands targeted for motion detection differ between the transmitting side and the receiving side.
この目的を達成するため本発明映像信号の帯域
圧縮伝送方式は、広帯域伝送の静止系回路と挟帯
域伝送の動系回路の両出力を動き検出回路の出力
に応じて混合して伝送する映像信号の帯域圧縮伝
送方式において、送信側で入力映像信号の周波数
帯域を受信側で動き検出可能な低周波帯域と受信
側で動き検出不可能な高周波数帯域の２つの帯域
に分割し、分割したそれぞれの帯域に対して画像
の動き検出を行ない、前記周波数帯域では動きが
検出されず、かつ、前記高周波数帯域では動きが
検出された場合に限つて、静止系統の映像伝送信
号の帯域を前記低周波帯域に制限することを特徴
とするものである。 To achieve this objective, the video signal band compression transmission method of the present invention transmits a video signal by mixing the outputs of a stationary circuit for wideband transmission and a dynamic circuit for narrowband transmission according to the output of a motion detection circuit. In the band compression transmission method of Image motion detection is performed for the frequency band, and only when no motion is detected in the frequency band and motion is detected in the high frequency band, the band of the video transmission signal of the stationary system is detected as the low frequency band. It is characterized by being limited to a frequency band.
（実施例）
以下添付図面を参照し実施例により本発明方式
を詳細に説明する。(Example) The system of the present invention will be described in detail below by way of an example with reference to the accompanying drawings.
第１図は本発明方式に係る動き検出回路、実施
例の略構成図である。フイルタ（F1）１１は第
５図示の領域０、Ｌ／２、CN、ANを通過させる
フイルタ、フイルタ（F2）１２はAN、CN、Ｄ、
Ｂを通過させるフイルタである。動き検出回路(1)
１３、および(2)１４はそれぞれ第３図示構成回路
と同一のものである。動き検出信号(1)および(2)は
論理判定回路１５に入力され全帯域の動き検出信
号ｋと制御信号ｌを出力する。 FIG. 1 is a schematic diagram of a motion detection circuit according to an embodiment of the present invention. The filter (F 1 ) 11 is a filter that passes areas 0, L/2, C N , and A N shown in the fifth figure, and the filter (F 2 ) 12 is a filter that passes A N , C N , D,
This is a filter that allows B to pass through. Motion detection circuit (1)
13 and (2) 14 are the same as the configuration circuits shown in the third diagram. The motion detection signals (1) and (2) are input to a logic decision circuit 15, which outputs a motion detection signal k and a control signal l for the entire band.
以下、論理判定回路１５の動作の例を説明す
る。出力ｋは通常は検出信号(1)および(2)の値の大
きい方の値とするが、動き検出信号(2)が動きを検
出しかつ動き検出信号(1)が動きを検出しないとき
に限り静止の判定を与えるものとする。制御信号
ｌは動き検出信号(2)が動きを検出しかつ動き検出
信号(1)が動きを検出しないときに限り有効値を与
えるものである。 An example of the operation of the logic determination circuit 15 will be described below. The output k is normally the larger value of the detection signals (1) and (2), but when the motion detection signal (2) detects movement and the motion detection signal (1) does not detect movement, A judgment of stillness shall be given for as long as possible. The control signal l gives a valid value only when the motion detection signal (2) detects motion and the motion detection signal (1) does not detect motion.
第２図は制御信号ｌによる制御を説明するもの
である。送信側の伝送映像信号の内静止部分の系
統内に周波数帯域を第５図示領域０、Ｌ／２、
CN、ANに制限する帯域制御フイルタ１６を設け
るものとする。動き検出信号(2)が動きを検出しか
つ動き検出信号(1)が動きを検出しないときに限り
制御信号ｌによりフイルタ１６側の経路を切換え
回路１７により選択される。 FIG. 2 explains control using the control signal l. The frequency bands in the stationary part of the transmitted video signal on the transmitting side are set in the fifth illustrated area 0, L/2,
It is assumed that a band control filter 16 is provided to limit the bandwidth to C N and A N . Only when the motion detection signal (2) detects motion and the motion detection signal (1) does not detect motion, the path on the filter 16 side is selected by the switching circuit 17 in accordance with the control signal 1.
以上の構成により受信側の動き検出の帯域が狭
い場合でも動き検出の送受信不整合による受信画
像の劣化を防ぐことができる。 With the above configuration, even when the motion detection band on the receiving side is narrow, it is possible to prevent deterioration of the received image due to mismatch between transmission and reception of motion detection.
以上は水平空間周波数を分割処理した場合であ
るが同様に垂直空間周波数についてあるいは水平
垂直両方についても考えることができる。また、
制御信号ｌは２値信号でなく多値を用いて第２図
示の２つの経路からの信号、静止系信号と帯域制
限フイルタ１６を介した静止系信号とを混合する
ものでも良い。また帯域制限フイルタ１６の挿入
位置、および制御信号ｌによる制御位置は入力映
像信号を静止系信号、動き系信号に分岐する以前
の信号位置であつても良い。 The above is a case where the horizontal spatial frequency is divided, but it is also possible to consider the vertical spatial frequency or both horizontal and vertical. Also,
The control signal l may be a multi-value signal instead of a binary signal, and may be a signal that mixes the signals from the two paths shown in the second diagram, the stationary signal and the stationary signal passed through the band-limiting filter 16. Further, the insertion position of the band-limiting filter 16 and the control position using the control signal 1 may be the signal position before the input video signal is branched into a still signal and a motion signal.
（発明の効果）
以上詳細に説明してきたように、本発明方式に
よれば、HDTVやEDTVなど動き検出回路を備
えた帯域圧縮伝送方式において、動き検出の対象
となる映像信号の周波数帯域が送信側と受信側で
異なる場合、従来受信画像に劣化の生じていたの
を排除することができる。(Effects of the Invention) As described in detail above, according to the method of the present invention, in a band compression transmission method such as HDTV or EDTV equipped with a motion detection circuit, the frequency band of the video signal subject to motion detection is transmitted. In the case where the image quality is different between the receiving side and the receiving side, it is possible to eliminate the deterioration that conventionally occurs in the received image.
また、送信側の動き判定をいくつかの帯域に分
割して行なうので、動き検出信号により制御され
る他の回路とも帯域に応じた検出回路を共用させ
るおとができるので、システム全体を簡易化する
ことができる利点もある。 In addition, since the motion determination on the transmitting side is performed by dividing it into several bands, it is possible to share the detection circuit according to the band with other circuits controlled by the motion detection signal, which simplifies the entire system. There are also advantages to being able to do so.
第１図は、本発明に係る動き検出回路の略構成
図を示し、第２図は、本発明に係る動き検出信号
および制御信号による制御を説明する略構成図を
示し、第３図は、従来例の動き検出回路の略構成
図を示し、第４図は、第３図示動き検出信号によ
る伝送信号の略処理系統図を示し、第５図は、映
像信号の伝送可能な２次元空間周波数帯域を示す
図である。
１……レベル抽出回路、２……エツジ抽出回
路、３……時間差信号検出回路、４……判定回
路、５……静止系回路、６……動系回路、７，１
８……混合回路、８，９……それぞれ空間周波数
帯域の領域、１１，１２……それぞれフイルタ
（F1）とフイルタ（F2）、１３，１４……それぞ
れ動き検出回路(1)と動き検出回路(2)、１５……論
理判定回路、１６……帯域制限フイルタ、１７…
…切換え回路。
FIG. 1 shows a schematic block diagram of a motion detection circuit according to the present invention, FIG. 2 shows a schematic block diagram illustrating control using a motion detection signal and a control signal according to the present invention, and FIG. A schematic configuration diagram of a conventional motion detection circuit is shown, FIG. 4 shows a schematic processing system diagram of a transmission signal using the motion detection signal shown in FIG. 3, and FIG. It is a figure showing a band. 1... Level extraction circuit, 2... Edge extraction circuit, 3... Time difference signal detection circuit, 4... Judgment circuit, 5... Stationary system circuit, 6... Dynamic system circuit, 7,1
8... Mixing circuit, 8, 9... Spatial frequency band area, respectively, 11, 12... Filter (F 1 ) and filter (F 2 ), respectively, 13, 14... Motion detection circuit (1) and motion, respectively. Detection circuit (2), 15...Logic judgment circuit, 16...Band limit filter, 17...
...Switching circuit.
Claims (1)
回路の両出力を動き検出回路の出力に応じて混合
して伝送する映像信号の帯域圧縮伝送方式におい
て、 送信側で入力映像信号の周波数帯域を受信側で
動き検出可能な低周波数帯域と受信側で動き検出
不可能な高周波数帯域の２つの帯域に分割し、分
割したそれぞれの帯域に対して画像の動き検出を
行ない、前記低周波数帯域では動きが検出され
ず、かつ、前記高周波数帯域では動きが検出され
た場合に限つて、静止系統の映像伝送信号の帯域
を前記低周波数帯域に制限することを特徴とする
映像信号の帯域圧縮伝送方式。[Scope of Claims] 1. In a video signal band compression transmission system in which the outputs of a stationary circuit for wideband transmission and a dynamic circuit for narrowband transmission are mixed and transmitted according to the output of a motion detection circuit, on the transmitting side: The frequency band of the input video signal is divided into two bands: a low frequency band where motion can be detected on the receiving side and a high frequency band where motion cannot be detected on the receiving side, and image motion detection is performed for each divided band. and limiting the band of the static video transmission signal to the low frequency band only when no motion is detected in the low frequency band and motion is detected in the high frequency band. Bandwidth compression transmission method for video signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320513A JPH02166983A (en) | 1988-12-21 | 1988-12-21 | Motion detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320513A JPH02166983A (en) | 1988-12-21 | 1988-12-21 | Motion detecting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02166983A JPH02166983A (en) | 1990-06-27 |
| JPH0524716B2 true JPH0524716B2 (en) | 1993-04-08 |
Family
ID=18122287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63320513A Granted JPH02166983A (en) | 1988-12-21 | 1988-12-21 | Motion detecting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02166983A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9894805B2 (en) | 2015-10-08 | 2018-02-13 | Samsung Electronics Co., Ltd. | Heat sink and memory module having the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2371998C (en) * | 1999-02-11 | 2006-01-24 | British Telecommunications Public Limited Company | Analysis of video signal quality |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6320984A (en) * | 1986-07-15 | 1988-01-28 | Nippon Hoso Kyokai <Nhk> | Compression system for television signal band |
| JPS63214093A (en) * | 1987-03-02 | 1988-09-06 | Matsushita Electric Ind Co Ltd | Movement detecting circuit |
-
1988
- 1988-12-21 JP JP63320513A patent/JPH02166983A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6320984A (en) * | 1986-07-15 | 1988-01-28 | Nippon Hoso Kyokai <Nhk> | Compression system for television signal band |
| JPS63214093A (en) * | 1987-03-02 | 1988-09-06 | Matsushita Electric Ind Co Ltd | Movement detecting circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9894805B2 (en) | 2015-10-08 | 2018-02-13 | Samsung Electronics Co., Ltd. | Heat sink and memory module having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02166983A (en) | 1990-06-27 |
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