JP2001148817A - Wide display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wide display system that consists of a wide display device and of a tuner that is compatible with a digital turner, has excellent noise immunity in the case of a single operation or in an interlocking operation and can execute aspect control to obtain a stable image. SOLUTION: The wide display system consists of the tuner that has a D terminal and an aspect ratio discrimination means to discriminate aspect ratio information included in a control signal at the terminal D and has an interlocking mode where a communication means informs of the aspect ratio information and a single mode where the turner is singly in operation, and of the wide display device that users the communication means to receive the aspect ratio information from an external device, has an interlocking mode where the aspect ratio control means conducts prescribed aspect conversion processing on the basis of the aspect ratio information and a single mode where the aspect control means conducts prescribed aspect conversion processing on the basis of the result of detection of an aspect ratio in a video input signal by the aspect ratio detection means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wide display system, and more particularly, to a tuner device and a wide display device for determining an aspect ratio based on a video input signal or a control signal, and performing an aspect conversion based on a result of the determination. And a wide display system.

[0002]

2. Description of the Related Art In recent years, the screens of displays such as televisions have become wider, and many wide displays have been sold in the market. 1 for wide display
At the same time as displaying a 6: 9 video source, the number of cases where a 4: 3 screen is converted to a wide screen for viewing is increasing. Also, the digitization of broadcasting is progressing rapidly, and BS
In broadcasting, digital broadcasting has begun, and terrestrial broadcasting is also being digitized. Around such a transition period, there is a demand for the emergence of a device that can cope with the digital broadcasting that will become mainstream in addition to the current broadcasting.

A conventional tuner device, a wide display device, and a wide display system combining them will be described with reference to FIG. 4 showing an example of a plasma wide display system. The wide display system A 'includes a tuner device B' and a wide display C '. In the tuner device B ', first, the signals received by the terrestrial broadcast antenna 3a and the satellite broadcast antenna 3b are tuned and amplified by the tuning / IF unit 4, and are composite video signals (hereinafter referred to as video signals) by the demodulation unit 5. Is demodulated. In addition to the broadcast reception, the tuner device B 'has a plurality of video input terminals 7 as an interface with the external AV equipment 6, an S terminal 8 for Y / C signals separated into a luminance signal and a chrominance signal, and Y, Pb, Pr. An input terminal 9 is provided for component signals such as signals.
The demodulated broadcast video signal and the video signal from the external AV device 6 are selected by the video switch 10 and output from the output terminal 11a. The video signal of the broadcast wave branched from the video switch 10 is Y / C separated by the Y / C separation unit 12, selected by the Y / C signal input from the external AV device 6 and the video switch 10b, and output from the output terminal 31b. Is done. The component signal input from the external AV device 6 is also output from the output terminal 11c. Tuner device B '
Is provided with a remote control receiving unit 16, and the CPU 17 performs signal switching and various controls based on the received command from the remote control. The CPU 17 is a tuner device B '
In addition to performing overall control, it also controls the communication control unit 18 and can perform information communication with an external device such as the wide display C ′. The command from the remote controller is controlled by the tuner device B ′ based on the command, and information communication is performed via the communication control unit 18.

In the wide display C ', an input video signal is first converted into a Y / C signal by a Y / C separation unit 12, and a Y / C signal input from an S terminal 31b is selected by a video switch 33a. Are converted into color difference signals by a color processing unit 34. The converted color difference signal is selected by a video switch 33b together with a component signal input from the outside, and is converted into a primary color signal by a matrix circuit 35. The converted primary color signal is aspect-converted by the aspect conversion section 36 based on the aspect ratio of the video input signal, and is displayed on the display section 37. The wide display C ′ includes a remote control light receiving unit 39, and performs various controls such as input signal switching and aspect conversion by the CPU 40 based on the received command. The CPU 40 controls the entire wide display C ′ as well as controls the communication control unit 42, and can perform information communication with an external device such as the tuner device B ′.

[0005] The wide display C 'is provided with an aspect ratio detecting section 38 for detecting the aspect ratio. Detection by the aspect ratio detection unit 38 is based on the input Y /
A method of determining the DC level of the color signal of the C signal and determining the aspect ratio based on the level, determining the ratio from the number of scanning lines to the number of horizontal pixels, and detecting a mask portion at the top and bottom of the screen of the video and It is determined whether the signal is a letterbox signal in which a 16: 9 screen is inserted into a 4: 3 screen having a mask portion. In the case of the wide display C ′, when the screen control is set to the auto mode, if the signal is determined to be a letterbox signal, the horizontal and vertical directions of the screen are enlarged and the
6: 9 wide display is performed. The wide display C ′ is compatible with multi-scan and can support various frequencies. It also has a wide mode that expands horizontally, and a zoom mode that also expands horizontally and vertically.
The screen can be selected according to the viewer's preference.

[0006] By combining the above-described tuner device B 'and wide display device C' to form a wide display system A ', it was possible to display various signals. Has been performed only by the aspect ratio detection unit built in the wide display device B ′. However, in the conventional method of determining the aspect ratio, the aspect ratio is determined based on the ratio between the number of scanning lines and the number of horizontal pixels, and the aspect ratio detection unit 38 monitors the image level of the mask portion at the top and bottom of the screen of the image.
When a levelless picture signal is detected for a certain period of time, the method is a 16: 9 letterbox signal. However, this method is a letterbox signal when noise is superimposed on the mask portion despite the letterbox signal. However, there is a problem that if a scene with dark top and bottom of the screen continues for a long time despite the presence of a normal signal, it is erroneously recognized as a letterbox signal. When the screen control of the wide display device C ′ is set to auto, the screen is frequently switched based on the erroneous recognition, which is very obstructive.

[0007] A digital tuner expected to appear newly has an interface called a D terminal, which adds component signals (Y, Pb, Pr) for video and control signals for scanning lines and aspect information. Standards have been proposed. Therefore, in order to easily perform display corresponding to the digital tuner and control the screen according to the aspect ratio,
It has been desired to equip the wide display device with the D terminal to perform stable aspect ratio discrimination based on a control signal and perform a stable display associated therewith. However, a large display device such as a plasma display is often installed on a wall or a ceiling, and providing a D terminal on the display device side requires a long wiring and impairs signal reliability. Thus, there is a problem that the cost of wiring work increases. In addition to the plasma display, many wide displays also support multi-scan, and the aspect ratio can be adjusted by remote control using wide and zoom screen operations. There has been a demand for a method of coping with a low-cost digital tuner that can be used effectively and operates more stably even in combination with a conventional device.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a so-called D terminal in a current analog tuner to support a digital tuner. It is an object of the present invention to provide a low-cost display system capable of performing excellent and stable aspect control of a screen.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a tuner apparatus having satellite broadcast and terrestrial broadcast receiving means and an input / output terminal for external AV equipment, and a wide display apparatus. A wide display system including communication means for performing communication, wherein the tuner device is an interface terminal (hereinafter referred to as a D terminal) for outputting a digital tuner interface signal including a video signal and a control signal. A) a digital tuner for receiving a digital broadcast having the following; a D terminal for inputting an interface signal for the digital tuner; and a D signal for inputting a signal obtained by separating a luminance signal and a chrominance signal from the external AV device. An interface terminal (hereinafter referred to as an S terminal), an input signal selected from the D terminal and the S terminal. An analog tuner having an aspect determining means for determining an aspect ratio of the image, and a CPU for performing control according to a first command for screen control from a tuner input unit. A CPU that performs screen control by a second command for screen control, an aspect ratio detection unit that detects an aspect ratio of a video input signal, and an aspect conversion unit that converts a screen into a different aspect ratio. The first command and the aspect ratio information determined by the aspect determination unit are notified of information from the tuner device to the wide display device by the communication unit, and the wide display device is notified by the aspect conversion unit based on the information notification. An interlock mode for performing a predetermined aspect conversion process; And a single mode in which second command and on the basis of aspect ratio information of the video input signal according to the aspect ratio detecting means and the widescreen display device performs a predetermined aspect ratio conversion process with the aspect ratio conversion unit.

The aspect determining means determines aspect ratio information included in the control signal from the digital tuner and the color signal of the S terminal from an external AV device.

The aspect ratio detecting means determines aspect ratio information contained in the color signal of the S terminal, and also determines the horizontal or vertical synchronization frequency of the video signal, the number of horizontal pixels, and the image of the mask portion above and below the screen. The aspect ratio information is determined based on the presence / absence detection.

The color signal of the S terminal and the control signal are input to an input port of a CPU having an A / D conversion function, and the aspect ratio information is determined based on a DC level of the input.

Further, when the tuner device has a video level control unit for controlling a level of a video output signal, and the aspect ratio information determined by the aspect determination means indicates a signal having a mask portion above and below a screen, A tuner device masks and outputs a signal of the input video signal from the mask unit by the video level control unit.

If the aspect ratio information determined by the aspect determining means is a signal having no mask portion above and below the screen, the tuner device controls the video level controller to control the mask of the input video signal. A predetermined portion of the section is output as a predetermined level.

Further, the operation of the video level control unit can be selected to be permitted or not permitted.

Further, the predetermined aspect conversion processing is as follows:
16: 9 when the aspect ratio information of the input signal is 16: 9
9 display, 4: 3 display having mask portions on both sides if the information is 4: 3, or display extending the screen in the horizontal direction, or letterbox signal having mask portions at the top and bottom of the screen. Display to expand the screen.

Further, the wide display device includes a storage unit, and stores a screen position, a screen size, and an aspect ratio for each type of signal having different horizontal synchronization frequency and scanning, and stores the same every time the same signal is input. The same screen position, the same size, and the same aspect ratio are restored.

Further, the predetermined aspect conversion processing includes:
Automatic or manual can be selected based on the determination result of the aspect ratio determination means.

Further, the wide display device includes an interlock mode switch, and the switch enables the interlock mode and the single mode to be selected.

If there is no communication response from the communication means, the tuner device and the wide display device each operate in a single mode.

Further, when the D terminal is not selected, the wide display device performs a predetermined aspect conversion process in the aspect conversion means based on the aspect ratio information from the aspect ratio detection means.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram of a tuner device, a wide display device, and a wide display system combining them for explaining an embodiment of the present invention. A description will be given based on FIG. In the figure, the same components as those of the conventional example are denoted by the same reference numerals. A wide display system A according to the present invention includes a tuner device B and a wide display device C. The tuner device B is an analog tuner 1 for receiving analog broadcast.
And a digital tuner 2 for receiving digital broadcasts interfaced with an analog tuner 1 through a so-called D terminal.

In the analog tuner 1, signals received by the terrestrial broadcast antenna 3a and the satellite broadcast antenna 3b are first tuned and amplified by a tuning / IF unit 4 serving as a receiving means.
The demodulation unit 5 demodulates the composite video signal. In addition to broadcast reception, the analog tuner 1 has a plurality of video input terminals 7 as an interface with an external AV device 6, an S terminal 8 for Y / C signals separated into a luminance signal and a chrominance signal, and Y, Pb, Pr signals. The input terminal 9 is provided for the component signal of. The demodulated broadcast wave video signal and the video signal from the external AV device 6 are transmitted to the video switch 1.
0a is selected and output from the output terminal 11a. The broadcast wave video signal branched from the demodulation unit 5 is converted to a Y / C separation unit 1.
2, Y / C separation, and Y input from the external AV device 6
The signal is selected by the / C signal and the video switch 10b, the level of a predetermined portion of the video signal is controlled under predetermined conditions by a video level control unit 13 described later, and is output from the output terminal 11b. The component signal input from the external AV device 6 is selected by the video switch 10 c and the component signal input from the D terminal 15 provided for the interface of the digital tuner 2, and output via the video level control unit 13. 11c. The D terminal 15 is formed integrally with a video terminal 15a and a control signal terminal 15b, and the control signal includes aspect ratio information and the like.

The analog tuner 1 is provided with a command input means such as a remote control receiving section 16 and an operation input switch (not shown) as a tuner input section. A
Various controls such as switching of input signals such as V equipment 6 and digital tuner input and switching of video switches are performed. The CPU 17 performs overall control of the analog tuner 1 and also controls a communication control unit 18 as a communication unit, and can perform information communication with an external device such as the wide display device C. A command from a remote controller or the like can also perform information communication via the communication control unit 18.

The analog tuner 1 has a CPU 17.
Is provided with an aspect determination unit 19 composed of an analog port of the digital tuner.
When the S terminal input from the V device is selected, the aspect ratio is determined. The control line input from the D terminal 15 and the color signal input of the S terminal are connected to separate ports having an A / D conversion function of the CPU 17, and the input selection of the tuner device B is performed by the digital tuner 2, that is, D. When the terminal input is selected, the port to which the control line input from the D terminal 15 is connected is selected to determine the DC level, and the input selection of the tuner device B selects the S terminal input of the external AV equipment. Determines the DC level of the port to which the color signal of the Y / C signal is connected, and determines the aspect ratio information of each input signal. In the analog tuner 1, the discrimination result of the aspect discrimination unit 19 and the level control setting switch 2
Based on the setting of 0, the video level control unit 13 controls the level of a predetermined portion of the video signal, and the aspect ratio information is notified to the wide display device C by the communication unit 18.

In the wide display device C, the video signal input from the input terminal 31a is
In step 2, the image signal is converted into a Y / C signal, the Y / C signal input from the S terminal 31b is selected by the video switch 33a, and the color processing unit 34 converts it into a color difference signal. The converted color difference signal is selected by a video switch 33b together with a component signal input from the outside, and is converted into a primary color signal by a matrix processing unit 35. The converted primary color signal is sent to the aspect conversion unit 3
In step 6, aspect conversion is performed based on the aspect ratio of the video input signal, and display is performed on the display unit 37. The color signal of the Y / C signal input from the S terminal 31b branches and is also input to the aspect ratio detection unit 38, where the aspect ratio information included in the color signal is detected. The component signal output from the video switch 33b branches and is input to the aspect ratio detection unit 38, where detection of the aspect ratio and whether or not the signal is a letterbox signal is performed.

The wide display device C is provided with command input means such as a remote control light receiving section 39 and an operation input switch (not shown) as a display input section. Various controls such as screen control such as switching and aspect conversion are performed. The CPU 40 has storage means 41 as a memory, and stores detected aspect ratio information, various screen control information, and the like. The CPU 40 generally controls the entire wide display device C and also controls the communication control unit 42, which is a communication unit, and can perform information communication with an external device such as the analog tuner 1. Further, the CPU 40 has an interlocking mode setting switch 43. When the switch 43 is turned on, the interlocking mode is set. When the switch 43 is turned off, the CPU 40 performs a series of operations. I have. In the interlocking mode, the CPU 40
Also monitors the state of the tuner device B and performs control as a wide receiver.

As the NTSC signal, a signal having an aspect ratio of 4: 3 is mainly used. However, as shown in FIG. 2, an EDTV having a mask portion above and below, and superimposing a high-definition component on the mask portion.
There are also two signals and a signal called a letterbox signal in which a non-picture part is inserted vertically into a landscape image of a cinemascope movie. FIG. 2 shows an example of an interlaced NTSC signal obtained by converting a 16: 9 screen into a 4: 3 screen. As shown in the figure, lines 23 to 52 are upper non-image portions, lines 233 to 262 are lower non-image portions, and the 16: 9 main screen is a line 53 to a line 232.
Inserted between. In addition to this, 16:
There is also a signal that inserts the screen of No. 9 by compressing it horizontally.
This is called a squeeze signal.

FIG. 3 is a diagram showing the relationship between the three control signals included in the D terminal 15 provided in the analog tuner 1 and the DC level included in the color signal component of the S terminal 8 and the aspect ratio information. Line 1 of the control signal of the D terminal 15 is used for identifying the number of scanning lines.
2V indicates 720 lines, and 0V indicates 480 lines. Line 2 indicates whether the scan is interlaced or interlaced or progressive or progressive and 5V is indicated by 60p at 60p.
Hz progressive scan, 0V is indicated by 60i 60
2 shows a Hz interlaced scan. Line 3 indicates the aspect ratio identification, and 5V indicates a 16: 9 screen, 2.2V indicates a letterbox screen, and 0V indicates a 4: 3 screen. Also, S
The color signal at terminal 8 also represents the aspect ratio at the DC level on which it is superimposed, a 16: 9 signal in which 5 V is compressed, ie, a squeeze signal, 2.2 V is a letterbox signal, and 0 V is 4: 3.
Is a normal signal.

In order to display the correct aspect ratio on the wide display device C, the aspect ratio information is obtained by determining the DC level of the control line of the D terminal and the color signal of the S terminal as described above. Can be displayed. However, large screen wide displays, such as plasma wide displays, are often mounted on a wall or mounted on a ceiling. Providing a D terminal on the display side requires a long wiring and requires a large wiring work. In order to solve this problem, in this embodiment, the analog tuner 1 is provided with a D terminal 15 and an aspect determination unit 19 is provided to determine the aspect ratio information, and the communication control unit 18 notifies the wide display device C of the information. Thus, a display with a correct aspect ratio is performed.

On the other hand, the wide display device C is provided with an aspect ratio detecting section 37 to operate independently, and the aspect ratio is detected independently. In the wide display device C, a line counter is provided inside,
The scanning lines are counted from the horizontal synchronization frequency, and by determining the phase difference of the screen for each field, it is also determined whether the scanning is interlaced or progressive.
The number of pixels is converted from the sampling clock in the horizontal scanning period, and the aspect ratio is also determined. In addition, the aspect ratio detector 38 also detects the Y / C signal and the letterbox signal.
And a method for determining the DC level of the color signal of the input Y / C signal and determining the aspect ratio based on the level, and a method for detecting upper and lower mask portions of a video image and having upper and lower mask portions. : 3 is a method of determining whether or not a 16: 9 screen is a letterbox signal inserted into a 16: 9 screen. In the wide display device C, when the screen control is set to the auto mode, if it is determined to be a letterbox signal, the horizontal and vertical directions of the screen are enlarged and the
6: 9 wide display is performed.

The wide display device C can be easily coped with by connecting the D terminal to the digital tuner 2 in combination with the analog tuner 1. However, the digital tuner 2 includes the Y, Pb, and Pr signal terminals 31c independently of each other and does not have the D terminal, and is a multi-scan type in which the aspect ratio detection unit 38 detects the aspect ratio.
Is possible. Further, the Y, Pb, and Pr signals of the digital tuner 2 and the Y / C signal are input simultaneously,
Since the detection of the aspect ratio of the signal of the Y, Pb, Pr signal terminal 31c can be selected to be determined by the Y / C signal, stable aspect determination and video display can be performed.

In the wide display device C, if it is determined from the detected or received aspect ratio information that the signal has an aspect ratio of 16: 9, a 16: 9 display is performed on the entire screen. If it is determined that the signal has an aspect ratio of 4: 3, display is performed by adding a mask portion having a gray signal on the left and right sides of the screen for displaying 4: 3 at the center of the screen.
Display the screen of 3 on the left or right on average, or
The center part keeps a perfect circle and displays both sides stretched.
These selections are made by the user's control, but the previous screen setting with the same input is stored in the storage unit 41,
It is set automatically. The wide display device C is multi-scan compatible, and has a wide mode that expands in the horizontal direction and a zoom mode that also expands in the horizontal and vertical directions so that it can support various frequencies. The screen position, size and aspect ratio can be selected and adjusted.

The analog tuner 1 is provided with the video level control unit 13 as described above. When the video signal is determined to be a 4: 3 or letterbox signal from the determined aspect ratio information, the top of the video signal screen is displayed. An operation of replacing a signal of a specific level in several lines corresponding to the lower end is performed. This is because in the wide display device C, the aspect of the 4: 3 or letterbox signal screen is determined in order to enlarge and display the screen, the aspect of the Y / C color signal is detected, and the upper and lower video levels of the screen are detected. Monitoring is performed, and when a non-image signal is detected for a certain period of time, the screen is enlarged as a letter box signal. Although the aspect detection of the Y / C color signal is considered to be stable, monitoring of the video level at the top and bottom of the screen determines that there is no non-picture part when noise is superimposed, and that the scene at the top and bottom of the screen is dark for a long time. If it continues, it will be mistaken as a letterbox signal. When the screen control of the wide display device C is set to auto, these switchings are frequently performed depending on the state of the signal, which is extremely annoying. In order to cope with this problem, according to the Y / C color signal and the information obtained from the line 3 of the D terminal 15, in the case of a letter box, the non-image portions at the top and bottom of the screen are replaced with black signals. On the other hand, in the case of the 4: 3 screen, several lines among the effective lines on the upper and lower sides of the screen are replaced with gray level signals slightly raised in level. This can prevent a normal screen from being mistaken for a letterbox signal. As a result, stable aspect control can be performed even when the analog tuner 1 operates alone and is combined with another wide display having no communication function.

In the case of the NTSC signal, there is also a method of superimposing high-definition components on the upper and lower mask portions like the EDTV2 signal. Therefore, whether to remove these signal components can be selected by the level control setting switch 20. ing. If the connected wide display device C does not have a function of restoring the high-definition component of the mask portion, the screen can be enlarged unconditionally.

The wide display device C of the present invention is provided with a line counter therein to count scanning lines.
By determining the phase difference of the screen for each field, it is also possible to determine whether the scanning is interlaced or pregressive,
In particular, it is not necessary to determine the line 1 and the line 2 of the control signal of the D terminal 15. Only the color signal of the line 3 and the Y / C signal need be determined. The DC level of each signal is determined by inputting the integrated signal to a port of the CPU 40 having an A / D conversion function and converting the signal into a voltage value. Then, the aspect ratio information is determined. By using the analog port of the CPU 40, additional circuits and parts can be reduced, and the cost can be reduced.

The screen mode of the wide display device C of this embodiment is set to auto-wide 1-wide 2-zoom 1.
-Zoom 2 can be set, and the horizontal width, vertical width, horizontal position, vertical position, etc. can be set and stored for each type of input signal, that is, for each signal having a different frequency and scanning. Therefore, if an optimal screen is set for each input signal, each time the same signal is input, the storage unit 4
1 is restored so that the screen state is reproduced. Although it is assumed that the latest information is used for the aspect ratio, stable automatic driving can be achieved with such a configuration. By combining the analog tuner 1 and the wide display device C as described above, a wide display system A is provided to display various signals and to use an expensive display for a digital tuner.

In the wide display system of the present invention, the tuner device B and the wide display device C have a single mode in which they operate independently and an interlock mode in which they operate in combination with each other. In the stand-alone mode, the analog tuner 1 does not communicate commands from the remote controller or aspect information from the aspect determination unit by communication means. The wide display device C performs control according to a command from its own remote control light receiving unit 39, and also determines the aspect ratio of the video signal by the aspect ratio detection unit 38, and according to the information,
Performs screen aspect conversion. In the interlocking mode, the tuner device B and the wide display device C operate as a wide display system A integrated. That is, the tuner device B notifies the wide display device C of the command from the remote controller or the like and the aspect information from the aspect determination unit 19 by the communication unit 18, and the wide display device C ignores the command from its own remote control receiving unit 39. Then, control is performed according to a command from the communication unit 42, and the screen aspect is converted according to the aspect ratio information of the received video signal. The single mode and the interlock mode are set by the interlock mode setting switch 43 built in the wide display device C. However, even if it is set as the interlock mode, there is no response from the communication means,
When an error does not occur and recovery is not performed, the operation is performed in the single mode, so that an erroneous setting of the interlocking mode setting switch 43 or a communication failure can be dealt with. With these functions, stable operation is possible as the display system A or as a single device.

If the input selection does not select the D terminal 15, does not select the S terminal 8, or if the selection of the S terminal 8 does not determine that the identification signal of the aspect is valid, etc. Information is notified from the tuner device B, and the wide display device C performs aspect ratio detection equivalent to that in the single mode and accompanying aspect processing. This is because the tuner device B has no means for detecting a letterbox signal.

In the aspect processing in the aspect conversion section 36, whether to automatically perform the aspect conversion can be set by a remote controller. Normally, it is generally considered to make full use of the 16: 9 screen, but this is also a matter of preference of the viewer, and selection setting is possible. further,
The screen mode that has been automatically set based on the aspect ratio information can also be changed using a remote controller or the like. In any case, the command from the remote controller or the like is given priority, and the screen mode once set is stored in the storage unit 41 for each type of input signal, and the past screen mode stored in the storage unit 41 other than the automatic mode is used. , In response to a command from a remote controller or the like.

[0041]

As described above, according to the present invention, an aspect determining means and a D terminal are provided. The aspect determining means determines the aspect ratio information included in the control signal of the D terminal and transmits the aspect ratio information. A tuner device having an interlock mode in which information is notified by means and a single mode operating independently, receiving aspect ratio information from the outside by communication means, and performing a predetermined aspect conversion process in aspect conversion means based on the information. To a digital tuner by combining an interlock mode in which the aspect ratio is detected by the aspect ratio detection means and a single mode in which the aspect conversion means performs predetermined aspect conversion processing based on the detection result of the aspect ratio of the video input signal. At the same time, it has excellent noise resistance in both independent operation and interlocking operation. Can perform the aspect control screen, low cost, can provide a wide display system including a tuner device and the wide display device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a wide display system of the present invention.

FIG. 2 is a diagram showing a screen configuration for explaining operations of an aspect detection unit and a video level control unit of the wide display system of the present invention.

FIG. 3 is a diagram showing a control signal of a D terminal and an identification signal of an S terminal, which are determined by an aspect determining unit of the wide display system of the present invention.

FIG. 4 is a block diagram showing a conventional example.

[Explanation of symbols]

Reference Signs List 1 analog tuner 2 digital tuner 3a terrestrial broadcasting antenna 3b satellite broadcasting antenna 4 channel selection / IF section 5 demodulation section 6 external AV equipment 7, 31a video input terminal 8, 31b S terminal 9, 31c component input terminal 10a, 10b , 10c, 33a, 33b Video switch 11a, 11b, 11c Output terminal 12 Y / C separation unit 13 Video level control unit 15 D terminal 16, 39 Remote control light receiving unit 17, 40 CPU 18, 42 Communication control unit 19 Aspect determination unit 20 Level control setting switch 32 Y / C separation unit 34 Color processing unit 35 Matrix processing unit 36 Aspect conversion unit 37 Display unit 38 Aspect ratio detection unit 43 Interlock mode setting switch A, A 'Wide display system B, B' Tuner device C, C 'wide display

Claims (13)

[Claims] 1. A wide display system comprising a tuner device and a wide display device having satellite broadcasting and terrestrial broadcasting receiving means and input / output terminals for external AV equipment, each having communication means for performing communication. A tuner device for receiving a digital broadcast having an interface terminal (hereinafter referred to as a D terminal) for outputting a digital tuner interface signal including a video signal and a control signal; The D terminal for inputting an interface signal for a tuner, and an interface terminal (hereinafter referred to as S) for inputting a signal obtained by separating a luminance signal and a chrominance signal from the external AV device.
A terminal), an aspect determining means for determining an aspect ratio of an input signal selected from the D terminal and the S terminal, and a CPU which performs control by a first command for screen control from a tuner input unit. An analog tuner having the wide display device, the CPU performs screen control by a second command for screen control from a display input unit, and an aspect ratio detection unit that detects an aspect ratio of a video input signal, And an aspect conversion unit for converting a screen into a different aspect ratio. The tuner device informs the aspect ratio information determined by the aspect determination unit from the tuner device to the wide display device by the communication unit. And the wide display device transmits the aspect based on the information notification. An interlocking mode in which a predetermined aspect conversion process is performed by a conversion unit, and the wide display apparatus performs a predetermined aspect conversion process in the aspect conversion unit based on the second command and aspect ratio information of a video input signal by the aspect ratio detection unit. And a single mode for performing the following. 2. The apparatus according to claim 1, wherein the aspect determination unit determines aspect ratio information included in the control signal from the digital tuner and a color signal of the S terminal from the external AV device. The wide display system as described. 3. The aspect ratio detecting means determines aspect ratio information included in the color signal of the S terminal, and also sets a horizontal or vertical synchronization frequency of a video signal, the number of horizontal pixels, and a video of a mask portion above and below a screen. The aspect ratio information is determined based on the presence or absence of the information.
Or the wide display system according to 2. 4. The color signal of the S terminal and the control signal are input to an input port of a CPU having an A / D conversion function, and the aspect ratio information is determined based on a DC level of the input. 4. The wide display system according to claim 1, wherein: 5. When the tuner device includes a video level control unit for controlling a level of a video output signal, and the aspect ratio information determined by the aspect determination unit indicates a signal having a mask portion above and below a screen. 5. The wide display system according to claim 1, wherein the tuner device masks and outputs a signal of the input video signal from the mask unit by the video level control unit. 6. When the aspect ratio information determined by the aspect determination means is a signal having no mask portion above and below a screen, the tuner device controls the mask of the input video signal by the video level control unit. 6. The wide display system according to claim 5, wherein a predetermined portion of the section is output as a predetermined level. 7. The wide display system according to claim 5, wherein the operation of the video level control unit can be selected from permission and non-permission. 8. The predetermined aspect conversion processing includes displaying 16: 9 when the aspect ratio information of the input signal is 16: 9, and 4: 3 having mask portions on both sides when the aspect ratio information of the input signal is 4: 3. Display or display that stretches the screen horizontally,
8. The wide display system according to claim 1, wherein, in the case of a letter box signal having a mask portion above and below the screen, a display is performed by extending the screen vertically and horizontally. 9. The wide display device includes a storage unit, and stores a screen position, a screen size, and an aspect ratio for each type of signal having different horizontal synchronization frequency and scanning, and stores the same every time the same signal is input. 2. The method according to claim 1, wherein the same screen position, the same size, and the same aspect ratio are restored.
9. The wide display system according to any one of items 8 to 8. 10. The apparatus according to claim 1, wherein the predetermined aspect conversion processing can select either automatic or manual based on a determination result of the aspect ratio determination means.
10. The wide display system according to any one of claims 9 to 9. 11. The wide display system according to claim 1, wherein the wide display device includes an interlock mode switch, and the switch enables the interlock mode or the single mode to be selected. 12. When there is no communication response from the communication means,
The tuner device and the wide display device,
The wide display system according to any one of claims 1 to 11, wherein the operation is performed in a single mode. 13. The wide display device, wherein when the D terminal is not selected, the wide display device performs a predetermined aspect conversion process in the aspect conversion unit based on the aspect ratio information from the aspect ratio detection unit. system.