JP3397978B2 - SECAM signal processing circuit - Google Patents

SECAM signal processing circuit

Info

Publication number
JP3397978B2
JP3397978B2 JP15688296A JP15688296A JP3397978B2 JP 3397978 B2 JP3397978 B2 JP 3397978B2 JP 15688296 A JP15688296 A JP 15688296A JP 15688296 A JP15688296 A JP 15688296A JP 3397978 B2 JP3397978 B2 JP 3397978B2
Authority
JP
Japan
Prior art keywords
signal
circuit
secam
level
secam 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.)
Expired - Fee Related
Application number
JP15688296A
Other languages
Japanese (ja)
Other versions
JPH1013851A (en
Inventor
修一 久坂
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP15688296A priority Critical patent/JP3397978B2/en
Publication of JPH1013851A publication Critical patent/JPH1013851A/en
Application granted granted Critical
Publication of JP3397978B2 publication Critical patent/JP3397978B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Description

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

【0001】[0001]

【発明の属する技術分野】本発明は、家庭用VTRに用
いられるSECAM信号処理回路に関するもので、特
に、到来してきた信号がSECAM信号であるか否かを
判別するSECAM信号判別回路を備えたSECAM信
号処理回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a SECAM signal processing circuit used in a home VTR, and more particularly to a SECAM signal discriminating circuit for discriminating whether or not an incoming signal is a SECAM signal. The present invention relates to a signal processing circuit.

【0002】[0002]

【従来の技術】図2は、従来のSECAM信号処理回路
を示すもので、記録モードを示している。入力端子
(1)にはベースバンドの記録用のSECAMビデオ色
(クロマ)信号が印加される。フィルタ(2)はベルフ
ィルタであり色信号の周波数特性をフラットにするもの
である。
2. Description of the Related Art FIG. 2 shows a conventional SECAM signal processing circuit and shows a recording mode. A SECAM video color (chroma) signal for baseband recording is applied to the input terminal (1). The filter (2) is a bell filter that flattens the frequency characteristics of the color signal.

【0003】抽出された4.40MHZ,4.25MHZの色信号は、
リミッタ増幅器(3)で分周に耐えうるようにアンプさ
れる。アンプされた色信号は、低域記録のために1/4分
周回路(4)で1/4に分周される。分周された色信号
は、フィルタ(5)で周波数特性を持たせるようにした
後、出力回路(6)に印加される。出力回路(6)は、
ミュート回路として動作するものである。
The extracted color signals of 4.40MHZ and 4.25MHZ are
It is amplified by a limiter amplifier (3) so as to withstand the frequency division. The amplified color signal is divided into 1/4 by the 1/4 frequency dividing circuit (4) for low frequency recording. The divided color signal is applied to an output circuit (6) after having a frequency characteristic by a filter (5). The output circuit (6) is
It operates as a mute circuit.

【0004】一方、リミッタ増幅器(3)の出力信号
は、SECAM信号判別回路(7)でSECAM信号で
あるか否かが判別される。SECAM信号判別回路
(7)は、バースト期間に存在する4.40MHZ,4.25MHZの
色信号の周波数を識別することでSECAM信号である
か否かを判別する。SECAM信号判別回路(7)の判
別出力信号は、出力回路(6)に印加されるとともに端
子(8)に導出される。
On the other hand, the output signal of the limiter amplifier (3) is discriminated by the SECAM signal discriminating circuit (7) as to whether it is a SECAM signal or not. The SECAM signal discriminating circuit (7) discriminates whether or not the signal is a SECAM signal by discriminating the frequencies of the 4.40MHZ and 4.25MHZ color signals existing in the burst period. The discrimination output signal of the SECAM signal discrimination circuit (7) is applied to the output circuit (6) and is led to the terminal (8).

【0005】出力回路(6)は、ミュート回路として動
作するものであり、SECAM信号判別回路(7)の判
別出力信号がSECAM信号でないことを判別している
時にはミュート動作を行う。その結果、不要信号が出力
端子(9)に発生することはなくなる。又、端子(8)
に得られる判別信号は、マイクロコンピュータ(図示せ
ず)に印加され、マイクロコンピュータがVTR全体の
システムをSECAM記録状態に切り換える。
The output circuit (6) operates as a mute circuit, and performs a mute operation when it is determined that the determination output signal of the SECAM signal determination circuit (7) is not a SECAM signal. As a result, no unnecessary signal is generated at the output terminal (9). Also, terminals (8)
The discrimination signal obtained at 1 is applied to a microcomputer (not shown), and the microcomputer switches the system of the entire VTR to the SECAM recording state.

【0006】従って、図2の装置によれば、SECAM
色信号の記録と判別を行うことができる。
Therefore, according to the device of FIG.
Color signals can be recorded and discriminated.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、図2の
装置では白黒信号が到来した場合にSECAM色信号の
判別を誤動作する恐れがあった。即ち、白黒信号が到来
した場合にはリミッタ増幅器(3)の入力信号はゼロと
なる。すると、リミッタ増幅器(3)は、無入力で増幅
動作をし、ノイズが増幅されて出力される。この増幅さ
れたノイズがSECAM信号判別回路(7)に印加され
ると、SECAM信号判別回路(7)はノイズを4.40MH
Z,4.25MHZの色信号の周波数であると一時的に誤判別す
る場合がある。
However, in the apparatus of FIG. 2, there is a risk that the SECAM color signal discrimination may malfunction when a black and white signal arrives. That is, when a black and white signal arrives, the input signal of the limiter amplifier (3) becomes zero. Then, the limiter amplifier (3) performs an amplifying operation with no input, and noise is amplified and output. When this amplified noise is applied to the SECAM signal discriminating circuit (7), the SECAM signal discriminating circuit (7) converts the noise to 4.40 MHz.
There may be a temporary misjudgment as the frequency of the Z, 4.25MHZ color signal.

【0008】[0008]

【課題を解決するための手段】本発明は、上述の点に鑑
みなされたもので、記録時に到来してきた信号がSEC
AM信号であるか否かを判別するSECAM信号判別回
路を備えたSECAM信号処理回路において、平滑用の
コンデンサを備え再生SECAM信号のレベル調整を行
うAGC回路と、前記SECAM信号判別回路に入力さ
れる記録SECAM信号のレベル検出を前記平滑用のコ
ンデンサに基づいて行うレベル検出回路を設け、該レベ
ル検出回路の検出出力信号に応じて前記SECAM信号
判別回路の判別結果を切り換えるようにしたことを特徴
とする。
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a signal that arrives at the time of recording is SEC.
In a SECAM signal processing circuit having a SECAM signal discriminating circuit for discriminating whether or not it is an AM signal, an AGC circuit having a smoothing capacitor for adjusting the level of a reproduced SECAM signal and the SECAM signal discriminating circuit are inputted. A level detection circuit for detecting the level of the recorded SECAM signal based on the smoothing capacitor is provided, and the determination result of the SECAM signal determination circuit is switched according to the detection output signal of the level detection circuit. To do.

【0009】[0009]

【発明の実施の形態】図1は、本発明のSECAM信号
処理回路を示すもので、(10)はリミッタ増幅器
(3)におけるSECAM信号のレベル検出を行い、そ
の検出出力信号に応じて前記SECAM信号判別回路
(7)の判別結果を切り換えるレベル検出回路、(2
0)は再生SECAM信号が印加される入力端子、(2
1)は再生SECAM信号を増幅するAGC増幅器(2
2)と該AGC増幅器(22)に利得制御信号を印加す
るAGC検波回路(23)とを備えるAGC回路、(2
4)は平滑用のコンデンサ、(25)は記録時、レベル
検出回路(10)側に、再生時AGC検波回路(23)
側に切り替わるスイッチ、(26)はAGC増幅器(2
2)の再生SECAM信号の周波数特性をフラットにす
るフィルタ、(27)はクロマ信号の周波数を4逓倍す
る4逓倍回路、(28)は記録時、入力端子(1)側
に、再生時4逓倍回路(27)側に切り替わるスイッ
チ、(29)は同期信号期間のノイズを除去するシンク
ゲート回路、(30)はベルフィルタである。
FIG. 1 shows a SECAM signal processing circuit according to the present invention, in which (10) detects the level of the SECAM signal in a limiter amplifier (3), and the SECAM signal is detected according to the detected output signal. A level detection circuit for switching the discrimination result of the signal discrimination circuit (7), (2
0) is an input terminal to which the reproduced SECAM signal is applied, and (2)
1) is an AGC amplifier (2 that amplifies the reproduced SECAM signal)
2) and an AGC detection circuit (23) for applying a gain control signal to the AGC amplifier (22), (2)
4) is a smoothing capacitor, and (25) is a recording side AGC detection circuit (23) on the level detection circuit (10) side during recording.
A switch for switching to the side, (26) is an AGC amplifier (2
2) A filter for flattening the frequency characteristic of the reproduced SECAM signal, (27) is a 4 times multiplication circuit for multiplying the frequency of the chroma signal by 4, (28) is 4 times during reproduction on the input terminal (1) side during recording. A switch that switches to the circuit (27) side, (29) is a sync gate circuit that removes noise in the synchronization signal period, and (30) is a bell filter.

【0010】尚、図1において、図2と同一の回路ブロ
ックについては同一の符号を付し、説明を省略する。ま
ず図3を利用して図1のレベル検出回路(10)の動作
について説明する。図3ではリミッタ増幅器(3)から
のSECAM信号のレベル検出を行い、あるレベルに達
していないときには、到来している信号はSECAM信
号ではない、と判別している。
In FIG. 1, the same circuit blocks as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. First, the operation of the level detection circuit (10) shown in FIG. 1 will be described with reference to FIG. In FIG. 3, the level of the SECAM signal from the limiter amplifier (3) is detected, and when it does not reach a certain level, it is determined that the incoming signal is not the SECAM signal.

【0011】例えば、白黒信号が到来したとすると、レ
ベル検出回路(10)は入力信号が小レベルであると判
別する。そして、レベル検出回路(10)はSECAM
信号判別回路(7)の判別出力信号を強制的に切り換え
る。この為、出力回路(6)は、ミュート回路としてミ
ュート動作する。又、端子(8)に得られる判別信号に
より、マイクロコンピュータがVTR全体のシステムを
SECAM信号受信以外の状態に切り換える。
For example, if a black and white signal arrives, the level detection circuit (10) determines that the input signal is at a low level. Then, the level detection circuit (10) is SECAM
The discrimination output signal of the signal discrimination circuit (7) is forcibly switched. Therefore, the output circuit (6) performs a mute operation as a mute circuit. In addition, the microcomputer switches the system of the entire VTR to a state other than the SECAM signal reception by the discrimination signal obtained at the terminal (8).

【0012】このため、SECAM信号判別回路(7)
は、白黒信号が到来しても誤動作することなく、SEC
AM信号以外の状態であると判別できる。又、正常なS
ECAM信号が到来している場合には十分なレベルの信
号がレベル検出回路(10)で検出される。この場合に
は、元々のSECAM信号判別回路(7)の判別出力信
号がそのまま発生できるようにすればよい。
Therefore, the SECAM signal discrimination circuit (7)
Does not malfunction even if a black-and-white signal arrives.
It can be determined that the state is other than the AM signal. Also, normal S
When the ECAM signal arrives, a signal of sufficient level is detected by the level detection circuit (10). In this case, the discrimination output signal of the original SECAM signal discrimination circuit (7) may be generated as it is.

【0013】SECAM信号判別回路(7)の判別出力
信号の切換方法には様々なやり方が考えられる。例え
ば、SECAM信号判別回路(7)の判別出力信号とレ
ベル検出回路(10)の検出出力信号とのアンドゲート
をとるようにしてもよい。又、SECAM信号判別回路
(7)が差動増幅器で構成されているならば、該差動増
幅器の2入力の一方に強制的に差動増幅器が反転するよ
うな信号を加えてもよい。 又、レベル検出回路(1
0)に加えるSECAM信号は、リミッタ増幅器(3)
の途中の増幅信号でもよいし、リミッタ増幅器(3)の
入力信号でもよい。
Various methods are conceivable for switching the discrimination output signal of the SECAM signal discrimination circuit (7). For example, an AND gate may be used for the discrimination output signal of the SECAM signal discrimination circuit (7) and the detection output signal of the level detection circuit (10). If the SECAM signal discriminating circuit (7) is composed of a differential amplifier, a signal for forcibly inverting the differential amplifier may be added to one of the two inputs of the differential amplifier. In addition, the level detection circuit (1
The SECAM signal added to 0) is the limiter amplifier (3).
It may be an amplified signal in the middle of, or an input signal of the limiter amplifier (3).

【0014】図4は、図3のリミッタ増幅器(3)及び
レベル検出回路(10)の具体回路例である。リミッタ
増幅器(3)は、例えば、増幅器(11)(12)(1
3)で構成される。図4では増幅器(11)の出力信号
が積分回路(14)に印加されている。積分回路(1
4)は、入力信号の平均レベルを検出する。検出された
直流信号は、バッファ(15)を介してコンパレータ
(16)に印加され基準電圧と比較される。
FIG. 4 shows a concrete circuit example of the limiter amplifier (3) and the level detection circuit (10) of FIG. The limiter amplifier (3) includes, for example, amplifiers (11) (12) (1
3). In FIG. 4, the output signal of the amplifier (11) is applied to the integrating circuit (14). Integration circuit (1
4) detects the average level of the input signal. The detected DC signal is applied to the comparator (16) via the buffer (15) and compared with the reference voltage.

【0015】入力信号のレベルが大きければ、出力端子
(17)に「H」レベルの信号が発生し、入力信号のレ
ベルが小さければ、出力端子(17)に「L」レベルの
信号が発生する。従って、図4の回路によれば、リミッ
タ増幅器(3)におけるSECAM信号のレベル検出を
行うことができる。
When the level of the input signal is high, an "H" level signal is generated at the output terminal (17), and when the level of the input signal is low, an "L" level signal is generated at the output terminal (17). . Therefore, according to the circuit of FIG. 4, the SECAM signal level in the limiter amplifier (3) can be detected.

【0016】ところで、図3のレベル検出回路(10)
では図4に示すように積分回路(14)を必要とする。
積分回路(14)を構成するコンデンサの存在は、図1
の回路をIC化することを考えたときに問題となる。即
ち、IC内には容量をあまり入れることができない。そ
こで、本発明ではレベル検出回路(10)用のコンデン
サとして記録時に使用されていないAGC用の平滑コン
デンサを活用することにした。これにより、レベル検出
回路(10)専用のコンデンサを配置する必要がなくな
り、IC化に好適である。
By the way, the level detection circuit (10) of FIG.
Then, an integrating circuit (14) is required as shown in FIG.
The presence of the capacitor forming the integrating circuit (14) is shown in FIG.
This becomes a problem when considering making the circuit of FIG. That is, it is impossible to put much capacity in the IC. Therefore, in the present invention, a smoothing capacitor for AGC which is not used during recording is used as the capacitor for the level detection circuit (10). This eliminates the need to dispose a capacitor dedicated to the level detection circuit (10), which is suitable for IC implementation.

【0017】それについて図1を参照して説明する。ま
ず、記録時においてはスイッチ(25)は図示と逆の状
態になり、スイッチ(28)は図示の状態となる。この
状態は図3と同様であり、同様の動作を行う。次に、再
生時では前記スイッチが逆の状態になる。入力端子(2
0)からの再生SECAM信号は、再生SECAM信号
を増幅するAGC増幅器(22)と該AGC増幅器(2
2)に利得制御信号を印加するAGC検波回路(23)
とを備えるAGC回路(21)に印加されレベル調整が
行われる。コンデンサ(24)はAGCの検波に利用さ
れる。AGC増幅器(22)からの再生SECAM信号
からは、低域変換されているクロマ(色)信号はフィル
タ(26)で周波数特性がフラットになる。クロマ信号
は周波数を4逓倍回路(27)で4逓倍されスイッチ
(28)、リミッタ増幅器(3)を介して同期信号期間
のノイズを除去するシンクゲート回路(29)に印加さ
れる。そして、シンクゲート回路(29)からの信号
は、ベルフィルタ(30)で周波数特性が調整されて出
力される。
This will be described with reference to FIG. First, at the time of recording, the switch (25) is in a state opposite to that shown in the figure, and the switch (28) is in the state shown in the figure. This state is the same as in FIG. 3, and the same operation is performed. Next, during reproduction, the switch is in the reverse state. Input terminal (2
0) from the reproduced SECAM signal is amplified by the AGC amplifier (22) for amplifying the reproduced SECAM signal and the AGC amplifier (2).
AGC detection circuit (23) for applying a gain control signal to 2)
It is applied to the AGC circuit (21) provided with and the level is adjusted. The capacitor (24) is used for AGC detection. From the reproduced SECAM signal from the AGC amplifier (22), the low-frequency converted chroma (color) signal has a flat frequency characteristic in the filter (26). The frequency of the chroma signal is multiplied by 4 by a quadruple multiplication circuit (27), and is applied to a sync gate circuit (29) that removes noise in the sync signal period via a switch (28) and a limiter amplifier (3). Then, the frequency characteristics of the signal from the sync gate circuit (29) are adjusted by the bell filter (30) and output.

【0018】従って、図1の装置によれば、AGC用の
コンデンサをSECAM信号のレベル検出を行うレベル
検出回路用のコンデンサとして兼用して使用することが
可能となり、IC化に適する。
Therefore, according to the apparatus shown in FIG. 1, the AGC capacitor can be used also as the capacitor for the level detection circuit for detecting the level of the SECAM signal, which is suitable for IC implementation.

【0019】[0019]

【発明の効果】以上述べた如く、本発明によれば、到来
してきた信号がSECAM信号であるか否かを判別する
SECAM信号判別回路を備えたSECAM信号処理回
路において、SECAM信号のレベル検出を行うレベル
検出回路を設け、該レベル検出回路の検出出力信号に応
じて前記SECAM信号判別回路の判別結果を切り換え
るようにしているので、白黒信号が到来した場合にもS
ECAM色信号の判別を誤動作する恐れがない。
As described above, according to the present invention, in the SECAM signal processing circuit having the SECAM signal discriminating circuit for discriminating whether or not the incoming signal is the SECAM signal, the SECAM signal level is detected. Since a level detection circuit for performing the above operation is provided and the determination result of the SECAM signal determination circuit is switched according to the detection output signal of the level detection circuit, even if a black and white signal arrives, S
There is no risk of malfunction in the discrimination of ECAM color signals.

【0020】特に本発明によれば、AGC用のコンデン
サをSECAM信号のレベル検出を行うレベル検出回路
用のコンデンサとして兼用して使用することが可能とな
り、IC化に適する。
In particular, according to the present invention, the AGC capacitor can be used also as the capacitor for the level detection circuit for detecting the level of the SECAM signal, which is suitable for IC implementation.

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

【図1】本発明のSECAM信号処理回路を示すブロッ
ク図である。
FIG. 1 is a block diagram showing a SECAM signal processing circuit of the present invention.

【図2】従来のSECAM信号処理回路を示すブロック
図である。
FIG. 2 is a block diagram showing a conventional SECAM signal processing circuit.

【図3】本発明のSECAM信号処理回路の説明に供す
るブロック図である。
FIG. 3 is a block diagram for explaining a SECAM signal processing circuit of the present invention.

【図4】本発明のリミッタ増幅器(3)及びレベル検出
回路(10)の具体回路図である。
FIG. 4 is a detailed circuit diagram of a limiter amplifier (3) and a level detection circuit (10) of the present invention.

【符号の説明】[Explanation of symbols]

(3) リミッタ増幅器 (10) レベル検出回路 (22) AGC回路 (3) Limiter amplifier (10) Level detection circuit (22) AGC circuit

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 記録時に到来してきた信号がSECAM
信号であるか否かを判別するSECAM信号判別回路を
備えたSECAM信号処理回路において、 平滑用のコンデンサを備え再生SECAM信号のレベル
調整を行うAGC回路と、 前記SECAM信号判別回路に入力される記録SECA
M信号のレベル検出を前記平滑用のコンデンサに基づい
て行うレベル検出回路を設け、該レベル検出回路の検出
出力信号に応じて前記SECAM信号判別回路の判別結
果を切り換えるようにしたことを特徴とするSECAM
信号処理回路。
1. A signal which arrives at the time of recording is SECAM
In a SECAM signal processing circuit having a SECAM signal discriminating circuit for discriminating whether or not it is a signal, an AGC circuit having a smoothing capacitor for adjusting the level of a reproduced SECAM signal, and a record inputted to the SECAM signal discriminating circuit SECA
A level detection circuit for detecting the level of the M signal based on the smoothing capacitor is provided, and the determination result of the SECAM signal determination circuit is switched according to the detection output signal of the level detection circuit. SECAM
Signal processing circuit.
【請求項2】 記録時に到来してきた信号がSECAM
信号であるか否かを判別するSECAM信号判別回路を
備えたSECAM信号処理回路において、 平滑用のコンデンサを備え再生SECAM信号のレベル
調整を行うAGC回路と、 記録SECAM信号を増幅し、前記SECAM信号判別
回路に印加するリミッタ増幅器と、 該リミッタ増幅器からのSECAM信号のレベル検出を
前記平滑用のコンデンサに基づいて行うレベル検出回路
を設け、該レベル検出回路の検出出力信号に応じて前記
SECAM信号判別回路の判別結果を切り換えるように
したことを特徴とするSECAM信号処理回路。
2. A signal that arrives at the time of recording is SECAM
In a SECAM signal processing circuit having a SECAM signal discriminating circuit for discriminating whether the signal is a signal or not, an AGC circuit having a smoothing capacitor for adjusting the level of the reproduced SECAM signal, and a recorded SECAM signal are amplified to obtain the SECAM signal. A limiter amplifier applied to the discrimination circuit and a level detection circuit for detecting the level of the SECAM signal from the limiter amplifier based on the smoothing capacitor are provided, and the SECAM signal discrimination is performed according to the detection output signal of the level detection circuit. A SECAM signal processing circuit, characterized in that the circuit determination result is switched.
JP15688296A 1996-06-18 1996-06-18 SECAM signal processing circuit Expired - Fee Related JP3397978B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15688296A JP3397978B2 (en) 1996-06-18 1996-06-18 SECAM signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15688296A JP3397978B2 (en) 1996-06-18 1996-06-18 SECAM signal processing circuit

Publications (2)

Publication Number Publication Date
JPH1013851A JPH1013851A (en) 1998-01-16
JP3397978B2 true JP3397978B2 (en) 2003-04-21

Family

ID=15637461

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15688296A Expired - Fee Related JP3397978B2 (en) 1996-06-18 1996-06-18 SECAM signal processing circuit

Country Status (1)

Country Link
JP (1) JP3397978B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100241908B1 (en) * 1997-02-28 2000-02-01 윤종용 Register signalling control method

Also Published As

Publication number Publication date
JPH1013851A (en) 1998-01-16

Similar Documents

Publication Publication Date Title
JP3397978B2 (en) SECAM signal processing circuit
EP0639933A2 (en) Method and apparatus for processing an audio signal by surround modes
JPH09322177A (en) Secam signal processing circuit
JP2690991B2 (en) Y / C separation circuit
JP4426207B2 (en) Video recording device
US5982975A (en) Video signal copying apparatus
US5396372A (en) Audio signal recording and reproducing apparatus
EP0462746B1 (en) Automatic reproducing system of a VCR
US6219485B1 (en) Method and apparatus for automatically adjusting the amplitude of a color burst signal
JPH04348000A (en) Voice processor
JP2987891B2 (en) Color video signal playback device
US5523855A (en) Discriminating device for automatically discriminating between recorded video signal reproduction modes
EP0735539B1 (en) Double deck video cassette tape recorder
JP2551798B2 (en) Color video signal processing device
KR100379449B1 (en) Apparatus and method for preventing erroneous detection for hi-fi audio of vcr
KR100213676B1 (en) Device and method for selecting and monitoring hifi in image recording/reproducing apparatus(vcr)
JP2591118Y2 (en) VTR with automatic signal discrimination circuit
JPH069388B2 (en) Mode determination device for recording medium reproducing device
JPH08251623A (en) Recording/reproducing apparatus for secam video signal provided with image quality compensating function
JPH1098687A (en) Magnetic recording and reproducing device
JPH0225192A (en) Magnetic recording and reproducing device of secam system
JPS6150485A (en) Detection system of color video signal
JPH0554534A (en) Video recording and reproducing device
JPH09163402A (en) Magnetic recording and reproducing device
JPS61153874A (en) Inversion preventing circuit

Legal Events

Date Code Title Description
FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090214

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees