JPS62160883A - Television receiver - Google Patents
Television receiverInfo
- Publication number
- JPS62160883A JPS62160883A JP247386A JP247386A JPS62160883A JP S62160883 A JPS62160883 A JP S62160883A JP 247386 A JP247386 A JP 247386A JP 247386 A JP247386 A JP 247386A JP S62160883 A JPS62160883 A JP S62160883A
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- signal
- memory
- image
- drop
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は受信する電波のレベル変動が多い例えば自動
車等の移動対に搭載するテレビ受信機にｙｌするもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applied to a television receiver mounted on a mobile vehicle such as a car, where the level of received radio waves fluctuates frequently.
自動車等の移動対に備えられたアンテナによってテレビ
電波を受信する場合、送信アンテナからの直接波と建物
、地面等からの反射波との干渉による定在波の影響でフ
ェージングが発生し、フラノターと呼ばれる画面のちら
つきや同期の乱れが生じテレビ画面が非常に見づらい状
態となる。When receiving television waves using an antenna installed on a moving vehicle such as a car, fading occurs due to standing waves caused by interference between direct waves from the transmitting antenna and reflected waves from buildings, the ground, etc. This causes screen flickering and synchronization disturbances, making it extremely difficult to view the TV screen.
これを軽減する為、複数のアンテナを異なる場所に立て
、それら複数のアンテナのうち、受信レベルが最大とな
るアンテナを選択して受信するダイパーシティ受信方式
の移動体搭載テレビ受信機が実用化されている。In order to alleviate this problem, a mobile TV receiver using a diversity reception method has been put into practical use, in which multiple antennas are installed in different locations, and the antenna with the highest reception level is selected for reception. ing.
〔発明が解決しようとする問題点］
しかして上記のようなテレビ受信機においては、アンテ
ナは定在波の山と谷に当たる距１碓たけ：！Ｉｕ して
立てるのが最も効果ある訳であるか、定在波は電波の周
波数によりその周１す１が変わりテレビ電波のように多
数のチャンネルを有する場合に全てのチャンネルで最良
位置にアンテナを立てることば実用上無理である。また
自動車のような限られた形状では最良の位置に立てられ
ない場合の方が多く、ダイパーシティ受信方式の効果も
充分には発揮されない。[Problems to be Solved by the Invention] However, in the above-mentioned television receiver, the antenna hits the peaks and troughs of the standing waves at a distance of 1.! The reason why it is most effective is to set the antenna at the best position for all the channels when the standing wave has many channels, such as TV radio waves, whose circumference changes depending on the frequency of the radio wave. It is practically impossible to put it into words. Furthermore, in a limited shape such as a car, it is often not possible to stand in the best position, and the effectiveness of the diversity reception method is not fully demonstrated.
更に、ビル等の陰で電波の届かない所ではダイパーシテ
ィ受信方式と言えども受信不可となる等ダイパーシティ
受信方式を採ってもなおかつ画面の見づらさがかなり残
るという問題点かあった。Furthermore, in areas where radio waves cannot reach, such as behind buildings, reception is impossible even with the diaperity reception method, and even if the diapercity reception method is used, the screen remains very difficult to see.
この発明は、このような問題点を解決する為になされた
もので、画面の見づらさを改善したテレビ受信機を得る
ことを目的とする。The present invention was made to solve these problems, and an object of the present invention is to provide a television receiver in which the difficulty of viewing the screen is improved.
この発明にかかるテレビ受信機は、アンチ、すによって
受信する電波の電界の落ら込みを検出する電界レベル検
出回路と、１画像分の映像信号をデジタル化して記憶す
る第１．第２の２つのメモリと、上記電界レベル検出回
路が電界の落ち込みを検出しない時は上記第１．第２の
メモリに記１ｉされた映像信号を交互に読み出し、上記
電界レベル検出回路か電界の落ち込みを検出した時は電
界が落ち込む前の１画像分の画像が記憶されている第１
、第２のメモリのいずれかの映（電画（象を読み出して
静止画像として画面に写し出すメモリ制御回路とを備え
たことを特徴とするものである。The television receiver according to the present invention includes an electric field level detection circuit that detects a drop in the electric field of radio waves received by an anti-wave, and a first electric field level detection circuit that digitizes and stores a video signal for one image. When the second two memories and the electric field level detection circuit do not detect a drop in the electric field, the first two memories. The video signals recorded in the second memory 1i are read out alternately, and when the electric field level detection circuit detects a drop in the electric field, the first memory stores the image for one image before the electric field drops.
, a memory control circuit that reads out an image (electronic image) from one of the second memories and projects it on the screen as a still image.
この発明にかかるテレビ受信機は１画像分の映像信号を
デジタル化して第１．第２の２つのメモリに記憶ｑてい
る。The television receiver according to the present invention digitizes the video signal for one image and transmits the first image. It is stored in the second two memories.
そしてメモリ制御回路は電界レベル検出回路が電界の落
ち込みを検出しない時は上記第１．第２のメモリに記憶
された映像信号を交互に読み出し、上記電界レベル検出
回路が電界の落ら込みを検出した時は電界が落ち込む前
の１画像分の画像が記憶されている第１．第２のメモリ
のいずれかの映像画像を読み出して静止画像として画面
に写し出す。Then, when the electric field level detection circuit does not detect a drop in the electric field, the memory control circuit performs the above-mentioned step 1. The video signals stored in the second memory are read out alternately, and when the electric field level detection circuit detects a dip in the electric field, the first memory stores the image for one image before the drop in the electric field. Any video image from the second memory is read out and displayed on the screen as a still image.
以下図面に基づいて本発明の一実施例を説明する。図面
は本発明の一実施例を示す構成図で、図において１は電
波を受信するアンテナ、２はアンテナで受信した電波を
人力して希望チャンネルの信号を選択するチューナと、
中間周波数に変換して増幅する中間周波数増幅回路と、
検波して複写映像信号を取り出し、音声信号を分岐する
検波回路とを有する受信回路、３は受信回路２で分岐し
た音声信号を増幅する音声回路、４ば音声回路３から出
力される音声信号によって音声を出力するスピーカ、５
は受信回路２で分岐した映像信号をデジタル信号に変換
するＡ／Ｄ変換器、６．７はＡ／Ｄ変換器５によってデ
ジタル化された映像信号を１画像分読み書きすることの
できる第１．第２のメモリ、８は第１．第２のメモリ６
．７から読み出したデジタル化された映像信号を再びア
ナログ信号に戻すＤ／Ａ変換器、９はＤ／Ａ変換器８か
ら出力されるアナログ映像信号の増幅や色処理を行う映
像処理回路、１０は映像処理回路９によって処理された
映像信号を写し出す受像管、１１は受信回路２から出力
さｎる複合映像信号から同期信号を分１副抽出して垂直
同期信号と水平同期信号を得る同期回路、１２：よ同期
回路１１からの同期信号に基ついて受像管１０のビーム
を偏向する偏向回路、１３は複合映像信号中の水平同期
信号のレベルを監視し、レベル低下傾向を検出すると次
にレベルが上昇するまで、即ら電界か落ち込み始めてか
ら、次に回復するまでの間、電界レベル低下信号を出力
する電界レベル検出回路、１４は上記電界レベル検出回
路１３が電界の落ち込みを検出しない時は上記第１．＠
２のメモリ６゜７に記憶された映像信号を交互に読み出
し、上記電界レベル検出回路１３が電界の落ら込みを検
出した時は電界が落ち込む前の１画像分の画像が記憶さ
れている第１．第２のメモリ６．７のいずれかの映像画
像を読み出して静止画像として画面に写し出すメモリ制
御回路である。An embodiment of the present invention will be described below based on the drawings. The drawing is a configuration diagram showing one embodiment of the present invention, and in the drawing, 1 is an antenna that receives radio waves, 2 is a tuner that manually selects the signal of a desired channel by using the radio waves received by the antenna,
an intermediate frequency amplification circuit that converts and amplifies the intermediate frequency;
3 is an audio circuit that amplifies the audio signal branched by the receiving circuit 2; 4 is an audio signal output from the audio circuit 3; Speaker that outputs audio, 5
6.7 is an A/D converter that converts the video signal branched by the receiving circuit 2 into a digital signal, and 6.7 is a first . The second memory, 8, is the first memory. second memory 6
．． 7 is a D/A converter which returns the read digitized video signal to an analog signal; 9 is a video processing circuit that performs amplification and color processing of the analog video signal output from the D/A converter 8; 10 is a video processing circuit A picture tube for projecting the video signal processed by the video processing circuit 9; a synchronization circuit 11 for sub-extracting a synchronization signal from the composite video signal outputted from the reception circuit 2 to obtain a vertical synchronization signal and a horizontal synchronization signal; 12: A deflection circuit that deflects the beam of the picture tube 10 based on the synchronization signal from the synchronization circuit 11. 13 monitors the level of the horizontal synchronization signal in the composite video signal, and when it detects a tendency for the level to decrease, the next level is adjusted. An electric field level detection circuit 14 outputs an electric field level reduction signal until the electric field rises, that is, from when the electric field starts to drop until it recovers. 1st. @
The video signals stored in the memory 6.2 are read out alternately, and when the electric field level detection circuit 13 detects a drop in the electric field, the video signal stored in the memory 6. 1. This is a memory control circuit that reads out any video image from the second memory 6 or 7 and displays it on the screen as a still image.
次にこのように構成された本発明の詳細な説明する。Next, the present invention configured as described above will be explained in detail.
まず、アンテナ１によって受信された電波は受信回路２
に人力され、ここで希望チャンネルの信号が選択され、
中間周波数に変換され、複合映像信号が取り出される。First, the radio waves received by the antenna 1 are transmitted to the receiving circuit 2.
The signal of the desired channel is selected here,
The signal is converted to an intermediate frequency and a composite video signal is extracted.
この取り出さｎた複合映像信号はＡ／Ｄ変換器５に入力
され、ここでデジタル信号に変換される。This extracted composite video signal is input to the A/D converter 5, where it is converted into a digital signal.
デジタル信号に変換ささた映像信号は第１．第２のメモ
リ６．７に一画像分ずつ交互に記憶される。The video signal converted into a digital signal is the first one. One image at a time is alternately stored in the second memory 6.7.
制御回路１４は電界レベル検出回路１３が電界の落ち込
みを検出しない時は上記第１．第２のメそり６．７に記
憶された映像信号を交互に読み出し、上記電界レベル検
出回路１３が電界の落ち込みを検出した時は電界か落ち
込む前の１画像分の画像が記憶されている第１．第２の
メモリ６．７のいずれかの映像画像を読み出して静止画
像として画面に写し出す。When the electric field level detection circuit 13 does not detect a drop in the electric field, the control circuit 14 performs the above-mentioned No. 1. The video signals stored in the second grid 6.7 are read out alternately, and when the electric field level detection circuit 13 detects a drop in the electric field, the second grid 6.7 stores the image for one image before the drop in the electric field. 1. Any video image from the second memory 6.7 is read out and displayed on the screen as a still image.
この場合第１のメモリ６に一画像分の映像信号が書き込
まれている間第２のメモリ６から一画像分の映像信号が
読み出され、第１のメモリ６から一画像分の映像信号が
読み出されている時第２のメモリ６に一画像分の映像信
号が書き込まれている。In this case, while the video signal for one image is written in the first memory 6, the video signal for one image is read out from the second memory 6, and the video signal for one image is read out from the first memory 6. At the time of reading, the video signal for one image is written in the second memory 6.
したがって受信したテレビ信号の１画像分を一旦第１９
メモリ６又は第２のメモリ７に書き込み、記・ｌｅ し
た後、次の１画像分で読み出し映像化するので結局テレ
ビ放送から１画像分即ち１／６０秒おくれた映像が出る
ことになる。Therefore, once one image of the received TV signal is
After writing to the memory 6 or the second memory 7 and recording, the next image is read out and converted into a video, so in the end, a video that is one image, that is, 1/60 seconds after the television broadcast, is output.
一方、音声は受信した内容がそのままスピーカ４から出
力されるので、映像より１／６０秒進むことになるが、
わずかな時間差の為実用上問題は起こらない電界が正常
な時は上記のように１画像分おくれた映像が出てくるか
、電界が落ち込んだ時は、メモリ制御回路１４によって
第１．第２のメモリ６．７の状態は切り換えられず、次
の画像においても電界が落ち込む前の１画像分の映像が
出力され続ける。電界が回復するまでこの病態が続くの
で、結局この間電界が正常な時の、正常な映像の静止画
が受像管１０に出ることになる。On the other hand, since the audio is output from the speaker 4 as it is received, it will be 1/60 seconds ahead of the video.
The time difference is so small that it does not cause any practical problems.When the electric field is normal, the image delayed by one image appears as described above, or when the electric field drops, the memory control circuit 14 outputs the first image. The state of the second memory 6.7 is not switched, and the image for one image before the electric field falls continues to be output for the next image as well. Since this condition continues until the electric field is restored, a normal still image will be displayed on the picture tube 10 during this period when the electric field is normal.
電界が回復した時には、次の垂直帰線期間の更に次の垂
直帰線期間から第１．第２のメモリ６゜７の状態の切り
換えが始まるので、電界の落ら込んだ時の乱れた映像は
全く出ないことになる。When the electric field is restored, the first . Since switching of the state of the second memory 6.7 begins, the distorted image caused by the electric field drop will not appear at all.
なお、上記実格例では、電界レベル検出回路１３は受信
回路２の出力の複合映像信号中の水平同期信号のレベル
を監視することにより電界レベルの低下を検出している
が、受信回路２の中の人力の大小に応じて増中度をコン
トロールするＡＧＣ電圧を監視することによっても同様
に電界レベルの低下を検出することができる。In the above practical example, the electric field level detection circuit 13 detects a decrease in the electric field level by monitoring the level of the horizontal synchronizing signal in the composite video signal output from the receiving circuit 2. Similarly, a decrease in the electric field level can be detected by monitoring the AGC voltage that controls the degree of increase depending on the amount of human power applied.
以上述べたようにこの発明はアンテナによって受信する
電波の電界の落ち込みを検出する電界レベル検出回路と
、１画像分の映像信号をデジタル化して記憶する第１．
第２の２つのメモリと、上記電界レベル検出回路が電界
の落ら込みを検出しない時は上記第１．第２のメモリに
記憶され、た映像信号を交互に読み出し、上記電界レベ
ル検出回路が電界の落ち込みを検出した時は電界か落ち
込む前の１画像分の画像が記憶されている第１．第２の
メモリのいずれかの映像画像を読み出して静止画像とし
て画面に写し出すメモリ制ｊ〕１１回路とを備えたので
、電界の落ち込みによる乱れた映像が切除され、画面の
見つらさか改善される。As described above, the present invention includes an electric field level detection circuit that detects a drop in the electric field of radio waves received by an antenna, and a first circuit that digitizes and stores a video signal for one image.
When the second two memories and the electric field level detection circuit do not detect a fall in the electric field, the first two memories and the electric field level detection circuit detect the electric field level detection circuit. The video signals stored in the second memory are read out alternately, and when the electric field level detection circuit detects a drop in the electric field, one image worth of images before the electric field drop is stored in the first memory. Equipped with a memory system 11 circuit that reads any video image from the second memory and projects it on the screen as a still image, the disturbed image due to the drop in the electric field is removed, improving the screen's difficulty in viewing. .
図面はこの発明の一実施例を示す構成図である。
５・・・Ａ／Ｄ変換器、６・−・第１のメモリ７・・・
第２のメモリ、８・・・Ｄ／Ａ変換器、１３・・・電界
レベル検出回路、１４・・・メモリ制御回路。
代理人 大 岩 増 雄（ばか２名）１丁ノ子
プ ２ 賀侶日ｙυ
３含１鴎洛 ４人び一右
５５５芝Ｆ史も ６ メセソ
７ メ七り ８ Ｄ／Ａ影梗も９１！９：ミイ
１ンミタシ１丁で［１ｒ！ココーミｒ １０ そ響ビ
イ１５２ウロ１１１ハｙＡ乱心 １２Φ臼可発
）３（匙Ｎルｎ（ロ）
１４メモリ對１ｆｔ’Ｉ＋回了各
昭和 年 月 日
回The drawing is a configuration diagram showing an embodiment of the present invention. 5... A/D converter, 6... First memory 7...
Second memory, 8...D/A converter, 13...Electric field level detection circuit, 14...Memory control circuit. Agent Oiwa Masuo (2 idiots) 1 Chonokopu 2 Kasyobi yυ 3 included 1 Oroku 4 people 1 right 555 Shiba F history 6 Meseso 7 Meshiri 8 D/A Kageyo also 91! 9: Mii 1 Inmitashi 1 gun [1r! Kokomi r 10 Sokyobii 152 Uro 111 HiA Ranshin 12Φ Usable) 3 (Spoon N Ru n (Ro) 14 Memory 1 ft'I + times completed each Showa year Month Day times
Claims (1)
する電界レベル検出回路と、１画像分の映像信号をデジ
タル化して記憶する第１、第２の２つのメモリと、上記
電界レベル検出回路が電界の落ち込みを検出しない時は
上記第１、第２のメモリに記憶された映像信号を交互に
読み出し、上記電界レベル検出回路が電界の落ち込みを
検出した時は電界が落ち込む前の１画像分の画像が記憶
されている第１、第２のメモリのいずれかの映像画像を
読み出して静止画像として画面に写し出すメモリ制御回
路とを備えたことを特徴とするテレビ受信機。An electric field level detection circuit that detects a drop in the electric field of radio waves received by the antenna, two memories, first and second, that digitize and store a video signal for one image, and the electric field level detection circuit detects a drop in the electric field. When the electric field level detection circuit detects no drop in the electric field, the video signals stored in the first and second memories are read out alternately, and when the electric field level detection circuit detects a drop in the electric field, the image for one image before the drop in the electric field is stored. 1. A television receiver comprising a memory control circuit that reads out a video image from either a first or second memory and projects it on a screen as a still image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP247386A JPS62160883A (en) | 1986-01-09 | 1986-01-09 | Television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP247386A JPS62160883A (en) | 1986-01-09 | 1986-01-09 | Television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62160883A true JPS62160883A (en) | 1987-07-16 |
Family
ID=11530294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP247386A Pending JPS62160883A (en) | 1986-01-09 | 1986-01-09 | Television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62160883A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01286587A (en) * | 1988-05-12 | 1989-11-17 | Toshiba Corp | Television picture processor |
| FR2643208A1 (en) * | 1989-02-10 | 1990-08-17 | Broadcast Television Syst | VIDEO SIGNAL SYNCHRONIZATION INSTALLATION |
| JPH02147983U (en) * | 1989-05-18 | 1990-12-17 | ||
| FR2656183A1 (en) * | 1989-12-15 | 1991-06-21 | Gold Star Co | FIXED IMAGE CIRCUIT FOR TELEVISION RECEIVER. |
| JP2007295431A (en) * | 2006-04-27 | 2007-11-08 | Fujitsu Ten Ltd | Digital data receiver |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58144958A (en) * | 1982-02-24 | 1983-08-29 | Hitachi Ltd | Shared memory controller |
| JPS61145976A (en) * | 1984-12-20 | 1986-07-03 | Nissan Motor Co Ltd | On-vehicle tv system |
-
1986
- 1986-01-09 JP JP247386A patent/JPS62160883A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58144958A (en) * | 1982-02-24 | 1983-08-29 | Hitachi Ltd | Shared memory controller |
| JPS61145976A (en) * | 1984-12-20 | 1986-07-03 | Nissan Motor Co Ltd | On-vehicle tv system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01286587A (en) * | 1988-05-12 | 1989-11-17 | Toshiba Corp | Television picture processor |
| FR2643208A1 (en) * | 1989-02-10 | 1990-08-17 | Broadcast Television Syst | VIDEO SIGNAL SYNCHRONIZATION INSTALLATION |
| JPH02147983U (en) * | 1989-05-18 | 1990-12-17 | ||
| FR2656183A1 (en) * | 1989-12-15 | 1991-06-21 | Gold Star Co | FIXED IMAGE CIRCUIT FOR TELEVISION RECEIVER. |
| JP2007295431A (en) * | 2006-04-27 | 2007-11-08 | Fujitsu Ten Ltd | Digital data receiver |
| JP4562684B2 (en) * | 2006-04-27 | 2010-10-13 | 富士通テン株式会社 | Digital data receiver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4394690A (en) | Variable aspect ratio television receiver | |
| US5805234A (en) | Television receiver | |
| US4864405A (en) | CRT video display device with automatically adjustable scanning amplitude | |
| US6636271B1 (en) | Apparatus and method for playing back a recorded video signal in a time compressed manner | |
| JPS62160883A (en) | Television receiver | |
| US6441847B1 (en) | Method for determining the quality of a video and/or television image signal | |
| JPH0550916B2 (en) | ||
| JPS58190180A (en) | Character broadcast receiver | |
| JPH05161083A (en) | Television receiver | |
| JPS62145972A (en) | Television receiver | |
| JPH0740727B2 (en) | Car TV | |
| US3763314A (en) | Ghost identification means in a television receiver | |
| CA2071283A1 (en) | Satellite television broadcasting receiver | |
| KR970009458B1 (en) | Method and apparatus of pip display system using one tuner | |
| JP3212089B2 (en) | Teletext receiving system for mobile objects | |
| JP2582371Y2 (en) | Video signal processing device | |
| KR20000000145U (en) | Test pattern display of television | |
| KR910005015Y1 (en) | Tele video-set | |
| JPS593662Y2 (en) | television receiver | |
| JPH0623103Y2 (en) | Television receiver | |
| JPH04302594A (en) | Muse-ntsc converter | |
| JPS6316206Y2 (en) | ||
| CA1165864A (en) | Variable aspect ratio televison receiver | |
| JPH05327639A (en) | Device for detecting audient source | |
| JPS60119183A (en) | Method for displaying information of television receiver on the basis of division of screen |