JP3006137B2 - Special effects device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a special effect device for processing a so-called EDTV video signal.

[0002]

2. Description of the Related Art For example, an EDTV having a screen aspect ratio of 16: 9, which is compatible with the current television standard system, is being studied. Such an EDTV
In, since the synchronization signal is the same as that of the current television standard system, the current one can be used as it is as the special effect device for switching or synthesizing screens.

That is, FIG. 3 shows a current special effect device, and 31 _{1 to} 31 _n are input terminals for video signals.
Video signals from the input terminals 31 ₁ to 31 _n are supplied to the switch circuit 32 of the matrix type, signal selected is taken out to the bus A33 ₁ and the bus B33 _2. These buses A33 ₁ and signal extracted in bus B33 ₂ is supplied to the synthesizing circuit 34, wipes, synthetic fading or the like is performed. The synthesized signal is taken out to the output terminal 35.

However, in this device, the input terminal 31
There is no problem if the video signals supplied to _{1 to} 31 _n are all the same. However, for example, if the aspect ratio is 1
When an EDTV of 6: 9 and a current television signal of 4: 3 are supplied simultaneously, for example, a video signal having an aspect ratio of 16: 9 as shown in FIG. When a video signal with such an aspect ratio of 4: 3 is synthesized,
As shown at C in the figure, a video signal having an aspect ratio of 4: 3 was stretched horizontally so that good synthesis could not be performed.

[0005] The possibility of supplying video signals having different aspect ratios as described above is considered when there is a mixture of new and old devices during the transition period or when it is desired to use an old program source. This is likely to occur many times.

On the other hand, it is conceivable that the supplied video signal is unified to one aspect ratio in advance by using a converter or the like. However, a huge video network such as a broadcasting station is constructed. In such cases, it is difficult to perform management one by one in advance.

[0007]

The problem to be solved is that, when a video signal having a different aspect ratio is supplied in the conventional apparatus, the video signal is distorted and good synthesis cannot be performed. Things.

[0008]

According to the present invention, a first signal having a first aspect ratio (4: 3) and a second signal having a second aspect ratio (16: 9) are supplied (input). Terminals 1 ₁ to 1
_n) is converted, along with means for determining the signal of at least one of the aspect ratio of the (circuit 6 _1, 6 ₂₎ are provided, the first aspect ratio of said first signal to said second aspect ratio Means (circuits 5 ₁ , 5 ₂ ) are provided, and when the first signal having the first aspect ratio is supplied, the signal passed through the conversion means is combined with the synthesis circuit 6.
This is a special effect device to be input to the device.

[0009]

According to this, when the signal of the first aspect ratio is supplied, it is converted into the second aspect ratio and supplied to the synthesizing circuit, so that the signal of the second aspect ratio is always supplied to the synthesizing circuit. Supplied and good synthesis without distortion can be performed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG.₁~ 1_nIs the video signal input
Terminal. These input terminals 1 ₁~ 1_nVideo signal from
Is supplied to the matrix-type switch circuit 2 and the selected
The received signal is bus A3₁And bus B3_TwoIs taken out.
These buses A3₁And bus B3_TwoSignal extracted to
Is changeover switch 4₁, 4_TwoSupplied to one of the fixed contacts
You.

[0011] These buses A3 ₁ and signal extracted in the bus B3 ₂ is supplied to the conversion circuit 5 _1, 5 ₂ for converting the aspect ratio of the video signal, for example an aspect ratio of 4: 3 signal aspect ratio 16 : 9. These converter 5 _1, 5 ₂ in the converted signal is supplied to the changeover switch 4 _1, 4 ₂ of the other fixed contact.

Further, the signals taken out to the bus A3 ₁ and the bus B3 ₂ are used as an aspect ratio discriminating circuit 6 _{1 for} a video signal.
Is supplied to the 6 _2, for example, the aspect ratio of the video signal is 16: When Not found 9, the changeover switch 4 _1, 4 ₂ is switched to the other fixed contact side. The signals from the changeover switches 4 ₁ and 4 ₂ are supplied to the synthesizing circuit 7 and synthesizing such as wipe and fade is performed. The synthesized signal is taken out to the output terminal 8.

Therefore, in this device, for example, the input terminal
1₁EDTV with 16: 9 aspect ratio is supplied to
Force terminal 1_TwoThe current television with an aspect ratio of 4: 3
A signal is supplied, and the input terminal 1₁
Is bus A3₁Is selected and input terminal 1_TwoIs bus B3_TwoTo
If selected, 4: 3 of the current television signals
Input terminal 1 to which the signal is supplied_TwoSelected bus B3_TwoTo
Discrimination circuit 6 connected _TwoThe aspect ratio of this video signal
Is not 16: 9, this bus B3_TwoContact
Continued changeover switch 4_TwoIs switched in the opposite direction
You. Thereby, the changeover switch 4_TwoFrom the input terminal 1
_Two4: 3 aspect ratio TV
Conversion signal 5_TwoConverted to 16: 9 aspect ratio
The converted signal is taken out and the converted aspect ratio 1
6: 9 signal and input terminal 1₁Aspect supplied to
An EDTV signal having a ratio of 16: 9 is supplied to the synthesizing circuit 7.
You.

That is, when a video signal having an aspect ratio of 16: 9 as shown in FIG. 2A and a video signal having an aspect ratio of 4: 3 as shown in B ₁ of FIG. the aspect ratio of the 4: is converted to 9 of the video signal: 3 video signal aspect ratio of 16, as shown in B ₂ in FIG. Then, by combining these video signals, good combining can be performed as shown in C of FIG.

[0015] Thus, according to the apparatus described above, the first aspect ratio (4: 3) the second aspect ratio when a signal is supplied (16: 9) to be converted (circuit 5 _1, 5 ₂₎ Since the signal is supplied to the synthesizing circuit 7, the signal of the second aspect ratio (16: 9) is always supplied to the synthesizing circuit 7, so that good synthesis without distortion can be performed.

[0016] In the apparatus described above, determination of the aspect ratio of the video signal, for example an aspect ratio of 16: 9 is provided an ID signal into the video signal, presence or absence of the ID signal by discriminating circuit 6 _1, 6 ₂ May be determined.

The above-described apparatus may convert a video signal having an aspect ratio of 16: 9 into an aspect ratio of 4: 3 when extracting a video signal having an aspect ratio of 4: 3 by synthesis.

[0018]

According to the present invention, when a signal having a first aspect ratio is supplied, the signal is converted into a second aspect ratio and supplied to a synthesizing circuit. Is supplied, and good synthesis without distortion can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example of a special effect device according to the present invention.

FIG. 2 is a diagram for explaining this.

FIG. 3 is a configuration diagram of a conventional device.

FIG. 4 is a diagram for the explanation.

[Explanation of symbols]

1 ₁ to 1 _n Video signal input terminal 2 Matrix type switch circuit 3 ₁ bus A 3 ₂ bus B 4 ₁ , 4 ₂ changeover switch 5 ₁ , 5 ₂ Video signal aspect ratio conversion circuit 6 ₁ , 6 ₂ video Signal aspect ratio determination circuit 7 Synthesis circuit 8 Output terminal

Claims (1)

(57) [Claims] 1. A first signal having a first aspect ratio and a second signal having a second aspect ratio are supplied, and means for determining at least the one aspect ratio signal is provided. Means for converting the first aspect ratio of the first signal to the second aspect ratio is provided;
A special effect device wherein, when a first signal having the first aspect ratio is supplied, a signal passing through the conversion means is input to a synthesis circuit.