JPH05167994A - Muse signal reception device - Google Patents

Abstract

PURPOSE:To prevent a display from becoming hard to see even when the output of a down converter which receives a high-vision signal and outputs an NTSC signal is displayed on an image receiver which has a 16:9 screen. CONSTITUTION:While the MUSE NTSC down converter 1 outputs a full-screen display signal, a computer 3 for system control performs lateral main body expansion processing by a time-base converting circuit 2 to converts a 4:3 screen output into a 16:9 screen output, thereby obtaining the easy-to-see screen.

Description

Detailed Description of the Invention

[0001]

The present invention relates to high-definition broadcasting for N
The present invention relates to a muse signal receiving device for receiving an image with a TSC receiver.

[0002]

2. Description of the Related Art Hi-vision test broadcasts are currently being conducted, and main broadcasts are scheduled in the near future. Therefore, various Hi-vision receivers have been proposed. The HDTV receiver is very different from the conventional NTSC system in that the image is sharp and the image is displayed on a 16: 9 wide screen.

Since such a high-definition television receiver is currently available at a price of several million yen, it cannot be easily purchased. Therefore, in order to allow a conventional NTSC television receiver to receive high-definition broadcasting, There is also proposed a down converter for converting a muse signal which is a signal of the above into an NTSC signal. By using this converter, you can watch high-definition broadcasts on a conventional NTSC receiver.

By the way, in recent years, efforts have been made to improve the image quality even in the case of an NTSC-type receiver for broadcasting images, in order to perform display as close to high-definition as possible. Also, recent devices are preferred to have a large screen, which is why NTSC
A 16: 9 large-screen device is also provided even though it is a system type receiver.

[0005]

However, since the down converter described above is for displaying the high-definition broadcast on the 4: 3 screen, when the converter output is displayed on the receiver having the 16: 9 screen. There is a problem in that there are no signal portions on the right and left sides of the screen, which makes the screen difficult to see.

The present invention has been made in view of such a situation, and it is an object of the present invention to make it difficult to see the down converter output even when it is displayed on a receiver having a 16: 9 screen.

[0007]

In order to solve such a problem, a muse signal receiving apparatus according to a first aspect of the present invention uses a down converter 1 for converting a muse signal to an NTSC signal and an aspect ratio of a down converter output signal. 1
The time axis conversion circuit 2 for converting to 6: 9 is provided.

According to a second aspect of the present invention, in the muse signal receiving apparatus of the first aspect, the down-converter 1 is a full screen conversion process for converting the entire muse screen into a 4: 3 NTSC screen. : 3 NTS
It is equipped with a wide screen process for converting to a C screen and a zoom process for converting only an area represented by 4: 3 of the muse screen to an NTSC screen. The time axis conversion circuit 2 mainly uses the result of the full screen conversion process in the horizontal direction. The horizontal main subject enlargement process is performed to enlarge the image to a muse screen, and the vertical enlargement process is performed to enlarge the result of the wide screen process mainly in the vertical direction to convert it to a muse screen.

[0009]

In the muse signal receiving apparatus according to the first aspect, the output of the down converter 1 is time-axis converted by the time-axis conversion circuit 2 and displayed on a 16: 9 screen.

In the muse signal receiving apparatus according to the second aspect, a horizontal main subject enlargement process for widening the result of the full screen conversion process in the time axis conversion circuit 2 to a horizontal direction main subject and converting it to a muse screen, a wide screen. Any one of the vertical expansion processing for expanding the processed result mainly in the vertical direction and converting it to a muse screen is performed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 base conversion circuit 2 and also muse on / off. The signal is supplied to the system control computer 3. The system control computer 3 is operated by a key input or a control signal input from a remote controller, and the Muse-NTS
It is configured to determine in which mode the C down converter 1 and the time base conversion circuit 2 operate.

The operation mode of the muse-NTSC down converter 1 is such that the aspect ratio of the muse screen shown by the symbol (a) in FIG. 2 is changed and the entire muse screen is displayed as a 4: 3 screen as shown by the symbol (b) in FIG. Full-screen mode, which displays the whole
The aspect ratio of the muse screen is the same, and the aspect ratio of the muse screen is not changed, while the horizontal direction of the muse screen is displayed in the 4: 3 screen horizontal direction as shown by the symbol (c) in FIG. As shown by the symbol (d) in FIG.
There is a zoom screen mode in which only the part that can be displayed on the screen is cut out and displayed on the entire 4: 3 screen. As described above, which mode is to be operated is determined by the output signal of the system control computer 3. There is.

In this case, a wide-screen display has a portion in which the display is not performed in the vertical direction, and a zoom-screen display has an image displayed on the entire screen but only a part of the muse screen. It will be.

The time axis conversion circuit 2 is 16: 9 in accordance with the aforementioned full screen display signal, wide screen display signal and zoom screen display signal supplied from the Muse-NTSC down converter 1. The time axis is converted so that it is displayed on the screen. That is, the symbol (b) in FIG.
As shown in FIG. 2, the screen displayed in full screen in the 4: 3 screen is subjected to the horizontal main subject enlargement processing in which the main subject is enlarged in the horizontal direction, and as shown by the symbol (e) in FIG. Displayed on the screen.

As shown by the symbol (c) in FIG. 2, the screen displayed in wide screen with the 4: 3 screen is subjected to the vertical enlargement process which is enlarged mainly in the vertical direction. ) Is displayed on the 16: 9 screen. The screen to be zoomed in the 4: 3 screen shown in the symbol (d) of FIG. 2 is not subjected to the time axis conversion, and as shown by the symbol (g) of FIG.
It is displayed as a screen of 6: 9. In this case, the screen indicated by the symbol (g) in FIG. 2 has no signals on the left and right sides of the display screen, so that part is not displayed.

FIG. 3 is a flow chart for explaining this operation. When the system control computer 3 receives the muse signal from the muse on / off signal supplied from the muse-NTSC down converter 1 in step 100. If so, in step 101 it is determined what the user select is. If it is determined that the user selection is the full screen display, the system control computer 3 sets the Muse-NTSC down converter 1 to the full screen mode in step 102, and the time axis conversion circuit 3 performs the horizontal main subject enlargement processing. To control.

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

When it is determined in step 103 that the system control computer 3 is not in the wide screen mode, the Muse-NTSC down converter 1 is set to the zoom screen mode and the time axis conversion circuit 2 is controlled to perform the time axis non-conversion processing. .. In this case, the time axis non-conversion processing converts a signal for a 4: 3 screen to a signal for a 16: 9 screen, but does not perform a time axis conversion for a video signal, and Muse-N.
A signalless portion is added to the right and left sides of the signal supplied from the TSC down converter 1.

[0019]

As described above, in the muse signal receiving apparatus according to the first aspect, since the muse-NTSC down converter output signal is time-axis converted, the NT for 16: 9 screen is used.
Even in the case of the SC system receiver, it is possible to view the high-definition broadcast on an easy-to-see screen.

Since the muse signal receiving apparatus according to claim 2 controls the time axis conversion circuit in correspondence with the full screen display, wide screen display and zoom screen display operations of the Muse-NTSC down converter, each screen is displayed. Correspondingly, there is an effect that a high-definition broadcast is displayed in the most observable state on a 16: 9 screen receiver.

[Brief description of drawings]

FIG. 1 is a block diagram showing an 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.

[Explanation of symbols]

 1 Muse-NTSC down converter 2 Time base conversion circuit 3 System control computer

Claims (2)

[Claims] 1. A down converter for converting a muse signal to an NTSC signal, and an aspect ratio of the down converter output signal is 16:
9. A muse signal receiving apparatus comprising a time axis conversion circuit for converting to 9. 2. The full screen conversion process according to claim 1, wherein the down converter converts the entire muse screen to a 4: 3 NTSC screen, and the wide screen converts a muse screen to a 4: 3 NTSC screen with a constant aspect ratio. Only the area represented by 4: 3 in the processing and muse screen is NTSC.
The time axis conversion circuit expands the result of the full screen conversion process to a horizontal direction and converts it to a muse screen, and the time axis conversion circuit vertically expands the result of the wide screen process. A muse signal receiving device, which performs vertical enlargement processing for expanding mainly a direction to convert it into a muse screen.