JP3310005B2 - Muse signal conversion device and method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a muse signal conversion device and method for receiving an image with a TSC receiver.

[0002]

2. Description of the Related Art Hi-vision test broadcasting is currently being carried out, and the main broadcasting is scheduled for the near future. Therefore, various high-vision receivers have been proposed. The HDTV receiver is significantly different from the conventional NTSC system in that the image is clear and the image is displayed on a 16: 9 wide screen.

At present, such a high-definition television receiver is priced at about several million yen and cannot be easily purchased. Therefore, a conventional NTSC receiver is required to receive a high-definition broadcast. A down-converter for converting a muse signal, which is a signal of the above, into an NTSC signal has also been proposed. When this converter is used, a high-definition broadcast can be viewed on a conventional NTSC receiver.

[0004] By the way, in recent years, even for a receiver for receiving broadcasts of the NTSC system, efforts have been made to improve the image quality in order to provide a display close to high definition at least. In recent years, devices having a large screen are preferred.
There is also provided a device with a large screen of 16: 9 even if it is a receiver of the system.

[0005]

However, since the downconverter described above is for displaying a high-definition broadcast on a 4: 3 screen, if this converter output is displayed on a receiver having a 16: 9 screen. will be able to upper side and lower side no signal section screen, there is a problem that becomes hard to see the screen.

The present invention has been made in view of such a situation, and is intended to prevent the downconverter output from being difficult to view even when displayed on a receiver having a 16: 9 screen.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a muse signal conversion circuit is provided.
The conversion device converts the received muse signal into an NTSC signal.
Conversion means for performing conversion processing for conversion, and conversion by the conversion means
The NTSC signal obtained as a result of processing is
Display control means for displaying on a 6: 9 screen and conversion means
First determining means for determining whether or not the conversion processing is being performed; and when the first determination means determines that the conversion processing is being performed, the conversion processing is displayed on a 16: 9 screen.
All of the displayed muse signals are displayed on the entire 4: 3 screen.
Full screen conversion process to be shown on the 16: 9 screen
All of the muse signals in 4: 3
Wide screen conversion processing to display on the screen or 16: 9
Second determining means for determining whether any of the muse signals displayed on the screen is one of zoom screen conversion processes for displaying only the portion represented by 4: 3 on the entire 4: 3 screen , If the conversion means determines that the conversion processing is full screen conversion processing, the result of the full screen conversion processing is obtained.
If it is determined that the conversion process is a wide-screen conversion process without changing the NTSC signal obtained , the wide-screen conversion process is performed.
The NTSC signal obtained as a result of the zoom screen conversion process is enlarged by mainly expanding the NTSC signal obtained as a result of the above, and it is determined that the conversion process is a zoom screen conversion process.
Is compressed mainly in the horizontal direction, and there is no signal
And output means for outputting to the display control means .

[0008] MUSE signal conversion method of the present invention, converts hand
First to determine whether conversion processing is being performed by the stage
The conversion process is performed in the determination step of
If the conversion processing is determined to be
All the muse signals displayed on the screen are 4: 3 screen
Full screen conversion processing to display the whole, 16: 9 screen
All of the displayed muse signals remain 16: 9
Wide screen conversion processing for displaying on a 4: 3 screen, or
Of the muse signals displayed on the 16: 9 screen, 4:
Only the portion represented by 3 is displayed on the entire 4: 3 screen
Second to determine whether any of the zoom screen conversion processes
In the determination step and the second determination step
If it is determined that the process is a full screen conversion process,
The NTSC signal obtained as a result of the screen conversion process is
If the conversion processing is determined to be wide screen conversion processing
The NTSC signal obtained as a result of the wide screen conversion process
Is enlarged mainly in the vertical direction, and the conversion process is
If it is determined that the zoom screen conversion process
Compress the resulting NTSC signal mainly in the horizontal direction
With the addition of a non-signal part on the left and right,
And an output step of outputting.

[0009]

In the muse signal conversion apparatus and method of the present invention, it is determined whether or not conversion processing is being performed by the conversion means.
If it is determined that the conversion process has been performed,
Muse signal displayed on 16: 9 screen when conversion process
Screen conversion to display all of the image on the entire 4: 3 screen
Processing, all of the muse signals displayed on the 16: 9 screen
To display on a 4: 3 screen with 16: 9 as is
Screen conversion processing or muting displayed on a 16: 9 screen
Only the portion represented by 4: 3 in the
In one of the zoom screen conversion processes to display the entire screen
Is determined, and the conversion process is a full screen conversion process
Is determined, the N obtained as a result of the full screen conversion process
The conversion process is wide screen conversion process with the TSC signal as it is
If it is determined that the
The expanded NTSC signal is expanded mainly in the vertical direction and transformed.
If the conversion process is determined to be a zoom screen conversion process,
The NTSC signal obtained as a result of the zoom screen conversion process is
The signal is compressed mainly in the direction, and no-signal parts are added to the left and right.
And output to the display control means.

[0010]

[0011]

FIG. 1 is a block diagram showing an embodiment of the present invention. A muse-NTSC down converter 1 converts a muse signal into an NTSC signal and supplies it to a time axis conversion circuit 2, and also sets muse on / off. The signal is supplied to the system control computer 3. The system control computer 3 receives a muse-NTS by a key input or a control signal input by a remote controller.
The mode in which the C down converter 1 and the time axis conversion circuit 2 operate is determined.

The operation mode of the muse-NTSC downconverter 1 is to change the aspect ratio of the muse screen shown by the symbol (a) in FIG. 2 to change the entire muse screen to a 4: 3 screen as shown by the symbol (b) in FIG. Full screen mode to display the whole,
The aspect ratio of the muse screen is the same, and the width direction of the muse screen is fully displayed in the 4: 3 screen, as shown by the symbol (c) in FIG. 2, and the aspect ratio of the muse screen remains unchanged. As shown by the symbol (d) in FIG.
There is a zoom screen mode in which only the portion that can be displayed on the screen is cut out and displayed on the entire 4: 3 screen. As described above, the mode to be operated is determined by the output signal of the system control computer 3. I have.

In this case, when the image is displayed on the wide screen, there is a portion where the image is not displayed in the vertical direction. When the image is displayed on the zoom screen, the image is displayed on the entire screen, but only a part of the muse screen is displayed. Will be.

The time axis conversion circuit 2 is a muse-NTSC
From the down converter 1 , a wide screen display signal,
When the zoom screen display signals are supplied,
Time axis so that the number is displayed on the 16: 9 screen ,
Output to a display unit not shown . The time axis conversion circuit 2 also
When a full-screen display signal is supplied, the signal is
Output to the display unit as it is. That is, the symbol (b) in FIG.
The full-screen display of the 4: 3 screen as shown in FIG. 2 is displayed on the 16: 9 screen as shown by the symbol (e) in FIG.
Is shown .

As shown in the symbol (c) in FIG. 2, a 4: 3 screen is displayed on a wide screen in a vertical direction in which the image is enlarged mainly in the vertical direction. ) in shows
This is displayed as a 16: 9 screen . The screen subjected to the zoom processing in the 4: 3 screen shown by the symbol (d) in FIG.
A horizontal subject reduction process that mainly reduces the horizontal direction is performed.
Then , as shown by the symbol (g) in FIG. 2, the screen is displayed as a 16: 9 screen. In this case, the screen shown by the symbol (g) in FIG. 2 does not have a signal on the left and right sides of the display screen, so that portion is not displayed.

FIG. 3 is a flowchart for explaining this operation. In step 100, the system control computer 3 determines that a muse signal has been input from the muse on / off signal supplied from the muse-NTSC down converter 1. When it is determined, it is determined in step 101 what the user selection is. Now the user select is determined to be a full screen display, the system control computer 3 step 102, the MUSE -NTSC downconverter 1 full-screen mode, the time base converting circuit 3, when
To perform inter-axis no-conversion processing (Muse-NTSC
Output NTSC signal from Barter 1 as it is
Control ) .

In step 101, when the system control computer 3 determines that the mode is not the full screen mode, in step 103, it determines whether or not the wide screen processing is performed. As a result, when the system control computer 3 determines that the display is a wide screen display, as shown in step 104, the muse-NTSC downconverter 1 is set to the wide screen mode, and the time axis conversion circuit 2 performs the vertical enlargement processing. Control.

If the system control computer 3 determines in step 103 that the mode is not the wide screen mode, the process proceeds to step S105, in which the muse-NTS
The C down converter 1 is set to the zoom screen mode, and the time axis conversion circuit 2 performs a horizontal main reduction process, and
For the signal supplied from NTSC downconverter 1
Control to add silence on the right and left sides.
You.

[0019]

According to the present invention, conversion processing is performed by the conversion means.
The conversion process is performed.
If it is determined that there is, the conversion processing is performed on the 16: 9 screen.
All of the displayed muse signals are spread over the entire 4: 3 screen.
Full screen conversion processing to be displayed, displayed on 16: 9 screen
All of the muse signals that are
Wide screen conversion processing to be displayed on the screen, or 16: 9
Of the muse signal displayed on the screen of 4: 3
Image that displays only the part to be displayed on the entire 4: 3 screen
Judge whether it is any of the surface conversion processes, and
Full screen conversion if it is determined to be
Conversion processing of the NTSC signal obtained as a result of processing
Is determined to be a wide screen conversion process,
The NTSC signal obtained as a result of the screen conversion process is
Mainly, the conversion process is a zoom screen conversion process
Is determined, the result of the zoom screen conversion process is obtained.
The NTSC signal is compressed mainly in the horizontal direction,
A non-signal part is added to the right and output to the display control means
Therefore, there is an effect that even a NTSC receiver for a 16: 9 screen can view a high-definition broadcast on an easy-to-view screen.

[0020]

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a muse signal receiving apparatus to which the present invention is applied.

FIG. 2 is a diagram showing a state of a display screen.

FIG. 3 is a flowchart for explaining the operation of the apparatus of FIG. 1;

[Explanation of symbols]

 1 Muse-NTSC down converter 2 Time axis conversion circuit 3 Computer for system control

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-9680 (JP, A) JP-A-3-218192 (JP, A) JP-A-3-218193 (JP, A) JP-A-3-218193 54980 (JP, A) JP-A-2-28597 (JP, A) JP-A-2-29191 (JP, A) JP-A-3-132185 (JP, A) JP-A-2-145882 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04N 7/01

Claims (2)

(57) [Claims] 1. A received muse signal is converted to an NTSC signal.
Converting means for performing a converting process for converting the data into NTS, and NTS obtained as a result of the converting process by the converting means.
Display the C signal on a screen with an aspect ratio of 16: 9
If the conversion process is determined to be performed by a display control unit, a first determination means for determining whether or not the conversion processing is performed by the conversion means, said first determination means, The conversion process is performed on a 16: 9 screen
All of the displayed muse signals are displayed on the entire 4: 3 screen.
Full screen conversion processing to be displayed on the body, displayed on 16: 9 screen
All of the muse signals shown remain 16: 9
Wide screen conversion processing for displaying on a 4: 3 screen , or
Among the muse signals displayed on the 16: 9 screen,
4: only a part represented by 3 4: is displayed on the entire 3 screen
A second determination unit that determines whether the conversion process is any of the zoom screen conversion processes to be performed. If the second determination unit determines that the conversion process is the full screen conversion process, the full screen conversion process
Intact resulting NTSC signal, if the conversion process <br/> is determined to be the wide screen conversion process, the resulting NTSC signal of the wide-screen conversion process,
If it is determined that the conversion process is the zoom screen conversion process by mainly expanding in the vertical direction, the NTSC signal obtained as a result of the zoom screen conversion process is mainly converted to the horizontal direction.
While compressing, add a no-signal part on the left and right,
MUSE signal conversion apparatus characterized by and output means for outputting the示制control means. 2. A received muse signal is converted to an NTSC signal.
Converting means for performing a converting process for converting the data into NTS, and NTS obtained as a result of the converting process by the converting means.
Display the C signal on a screen with an aspect ratio of 16: 9
Muse of muse signal conversion device provided with display control means
In the signal conversion method, whether or not the conversion processing is performed by the conversion unit
And the conversion processing is performed in the first determination step of determining
Is determined, the conversion processing is performed on the 16: 9 screen.
All of the displayed muse signals are displayed on the entire 4: 3 screen.
Full screen conversion processing to be displayed on the body, displayed on 16: 9 screen
All of the muse signals shown remain 16: 9
Wide screen conversion processing for displaying on a 4: 3 screen, or
Among the muse signals displayed on the 16: 9 screen,
Only the portion represented by 4: 3 is displayed on the entire 4: 3 screen.
Judge whether it is any of the zoom screen conversion processing
In the processing of the second determination step and the second determination step, the conversion processing
When it is determined that the screen conversion processing is performed, the full screen conversion is performed.
The NTSC signal obtained as a result of the conversion
If the conversion process is determined to be the wide screen conversion process,
The NTSC signal obtained as a result of the wide screen conversion process.
The signal is enlarged mainly in the vertical direction, and the conversion process
If it is determined that the zoom screen conversion process, the zoom
The NTSC signal obtained as a result of the screen conversion
In addition to compressing the subject, adding a non-signal part on the left and right,
MUSE signal conversion method characterized by comprising an output step of outputting to the display control unit.