JPH0898135A - Wide television signal recording and reproducing device - Google Patents

Abstract

PURPOSE: To optimize a reproduced video signal in accordance with the aspect ratio of a recorded signal and the aspect ratio of a display device. CONSTITUTION: A High Vision signal is converted into the NTSC signal of a second TV system whose aspect ratio is 16:9 in a MUSE/NTSC signal processing circuit 5. This NTSC signal and the NTSC signal of a present system are selected by switch circuits 9 and 10 and are recorded on a magnetic tape 24. An identification control signal SCTL showing that a recording signal is either of the NTSC signals is generated in an identification control signal generation circuit 19, and is recorded on the magnetic tape 24. The reproduced NTSC signal is processed in a reproduced chrominance signal processing circuit 33 and a reproduced luminance signal processing circuit 37. The characteristics of the circuits 33 and 37 are controlled in accordance with the judged result of the identification signal in the identification control signal by a recording mode identification circuit 30, and the optimum characteristics are set in the respective NTSC signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus having a built-in television system converter, and more particularly to recording / reproducing wide television signals for preserving compatibility with the existing television system and widening the screen. Regarding the device.

[0002]

2. Description of the Related Art With the commercialization of a high-definition television system, commercialization of high-definition VTRs, high-definition laser discs, etc. has been promoted. The high-definition television system is in principle not compatible with the current television system. However, while the prevalence rate of high-definition television receivers, recording / reproducing devices, etc. is still extremely low, the prevalence rate of almost 100% has been obtained for the current television system. Therefore, a signal generation device that widens the screen while maintaining compatibility with the current television system can be considered. As one example, Japanese Patent Laid-Open No. 5-24
There is a letter box type television signal generating device as disclosed in Japanese Patent No. 4569.

This is a scanning line number conversion process for carrying out a 3: 1 scanning line thinning process for 1080 effective pixel scanning lines in a video signal of a high-definition television system having an aspect ratio of 16: 9 and scanning lines of 1125. In this way, a video signal is generated by the letterbox method with 360 effective pixel scanning lines, and thereby the screen is widened.

On the other hand, the aspect ratio is 16: 9 and the number of scanning lines is 1.
A television image receiving system in which 125 high-definition television image signals are converted into a television image signal with an aspect ratio of 16: 9 and 525 scanning lines, and a wide screen is obtained by receiving the image signals. Machines are rapidly becoming popular.

[0005]

By the way, as described above, when a letter box type video signal is supplied to a wide television receiver, the displayed image seems to be horizontally elongated, but the vertical non-image part is displayed. Therefore, by enlarging the image in the vertical direction by that amount, it is possible to display the letterbox image in the full screen by adjusting the circularity. However, such image enlargement is usually performed by enlarging the vertical deflection width in the deflection circuit of the picture tube. With such a method, the resolution in the vertical direction does not change, but the number of scanning lines appearing on the screen becomes 360, so that the roughness of the scanning lines becomes more conspicuous as the screen becomes larger.

Further, with the expansion of high-definition broadcasting, a recording / reproducing apparatus for converting a high-definition image signal into a current television image signal and recording / reproducing is required. In this case, in the recording / reproducing apparatus, in addition to two modes for a video signal of the current television system and a video signal obtained by converting a video signal of the high-definition system into the current television system, a television receiver of the current television system and a wide screen are used. Optimal signal processing is required for the TV receiver.

When the aspect ratio of the display screen is 16: 9 and is horizontally long as in the high-definition system, the aspect ratio of the display screen is 4: 3 as compared with the display screen of the current television system.
High horizontal resolution is desirable. For this purpose, it is better to increase the frequency of band emphasis applied to the video signal. However, when the video signal processing is performed in this way, when a video signal of the current television system having an aspect ratio of 4: 3 is supplied, the horizontal resolution becomes excessively high and the image quality deteriorates. I will end up.

The object of the present invention is to solve this problem and
It is an object of the present invention to provide a wide television signal recording / reproducing apparatus capable of obtaining an optimum video signal according to the aspect ratio of each kind.

[0009]

In order to achieve the above object, the present invention has an aspect ratio of 16: 9 and a scan line number of 112.
The five video signals of the first television system are converted into video signals of the second television system having an aspect ratio of 16: 9 and 525 scanning lines, and converted to video signals of the second television system. A video signal of the current television system having an aspect ratio of 4: 3 and 525 scanning lines is selected and recorded on a recording medium, and the recording signal is the video signal of the second television system or the current television system. An identification signal for identifying whether the video signal is a video signal is recorded in the recording medium, the characteristic is switched according to the determination signal, and the video signal reproduced from the recording medium is reproduced.

Further, according to the present invention, the characteristic of the first means is switched depending on whether the connected display device is based on the second television system or the current television system. .

Then, the second means for processing the output video signal of the first means to remove the deformation of at least a part of the original picture, the identification signal and the display device are the second television. There is provided a selecting means for selectively outputting the output video signals of the first and second means to the display device depending on whether it is based on the television system or the current television system.

Further, instead of the second means, a means which makes it possible to select the characteristic of compressing the image in the vertical direction and the characteristic of cutting both sides of the image and extending it in the horizontal direction is used.

[0013]

The characteristics of the reproduction processing can be made different depending on whether the video signal reproduced from the recording medium is the video signal of the second television system or the video signal of the current television system. Therefore, it is possible to set various characteristics such as the frequency characteristic of the luminance signal and the contour correction characteristic according to each method, and it is possible to obtain a display image of optimum image quality regardless of the method.

The characteristics of the reproduction process can be made different depending on whether the connected display device is based on the second television system or the current television system. Therefore, the respective systems can be made different from each other. It is possible to set various characteristics such as the frequency characteristic and the contour correction characteristic of the luminance signal according to the above, and it is possible to obtain a display image of optimum image quality regardless of the method of the display device.

The selecting means selects the output video signal of the second means only when the reproduced video signal is the video signal of the second television system and the display device is the current television system. At other times, the output video signal of the first means is selected, and thus, a display image without distortion can be obtained regardless of the reproduction video signal or the display device.

Further, when the reproduced video signal is the video signal of the second television system and the display device is the current television system, the display image is vertically compressed so that no image is displayed above and below the screen. A part appears, but the image can be displayed without distortion as a whole, and it is also possible to display the image on the entire screen without distortion, although both sides of the image are missing, whichever display is performed. Alternatively, the user can arbitrarily select.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a wide television signal recording / reproducing apparatus according to the present invention, in which 1 is a recording mode selection terminal, 2 and 3 are input terminals, 4 is a BS (satellite broadcast) tuner, 5 Is a MUSE / NTSC signal processing circuit,
6 is a TV tuner, 7 is a switch circuit, 8 is a luminance / color separation circuit, 9 and 10 are switch circuits, 11 is a recording luminance signal processing circuit, 12 is an emphasis circuit, 13 is a frequency modulation circuit, and 14 is a recording color signal processing. Reference numeral 15 is a low-pass conversion circuit, 16 is a low-pass filter (LPF), 17 is an adding circuit, 18 is a recording amplifier, 19 is an identification control signal generating circuit, 20 and 21 are magnetic heads, 22 and 23 are guide posts, and 24. Is a magnetic tape, 25 is a rotating cylinder, 26
Is a recording amplifier, 27 is a CTL (control) head,
28 and 29 are reproduction amplifiers, 30 is a recording mode identification circuit,
Reference numeral 31 is an LPF, 32 is a high frequency conversion circuit, 33 is a reproduction color signal processing circuit, 34 is a high pass filter (HPF), 35 is a frequency demodulation circuit, 36 is a de-emphasis circuit, 37 is a reproduction luminance signal processing circuit, and 38 is addition. The circuit, 39 is an identification signal superimposing circuit, 40 is a color signal output terminal, 41 is a video signal output terminal, and 42 is a luminance signal output terminal.

In the figure, a satellite broadcast reception signal input from the input terminal 2 is supplied to the BS tuner 4, and an HDTV system signal having an aspect ratio of 16: 9 and 1125 scanning lines (hereinafter referred to as the first This is referred to as a television system video signal, which is herein referred to as a MUSE signal) or an NTSC signal of a current television system (hereinafter, simply referred to as a current system) having an aspect ratio of 4: 3 and 525 scanning lines. The terrestrial received signal input from the input terminal 3 is selected by the TV tuner 6, and an NTSC signal of the current television system having an aspect ratio of 4: 3 and 525 scanning lines is obtained. NTSC signal output from BS tuner 4 or N output from TV tuner 6
The TSC signal is selected by the switch circuit 7 (hereinafter, these NTSC signals are referred to as current system NTSC signals),
The luminance / color separation circuit 8 separates the luminance signal and the color signal,
The luminance signal is supplied to the side b of the switch circuit 9, and the color signal is supplied to the side b of the switch circuit 10. On the other hand, the video signal of the first television system output from the BS tuner 4 is converted into the NTSC signal of the second television system by the MUSE / NTSC signal processing circuit 5, and at the same time converted into a luminance signal and a chrominance signal. The luminance signal is separated to the side a of the switch circuit 9, and the color signal is separated to the side a of the switch circuit 10.
Supplied to each side.

In the MUSE / NTSC signal processing circuit 5,
As shown in FIG. 2, a scanning line thinning process of 2: 1 is performed on a signal series of 960 effective pixel scanning lines, and the aspect ratio is 16: 9, the number of scanning lines is 525, and effective pixel scanning is performed. A video signal sequence in the form of interlaced scanning with 480 lines, 30 frames / second, is generated. This is the above-mentioned second television system NTSC signal. On the other hand, the NTSC signal of the current system is the NTSC signal of the third television system.

The switch circuits 9 and 10 are provided with a recording mode selection signal M from the recording mode selection terminal 1 in response to a user operation.
Controlled by S, the second television system NTS
Either the C signal or the current system NTSC signal is selected. Therefore, one of the NTSC signal of the second television system and the NTSC signal of the current system is selected according to the preference of the user.

Further, the identification control signal generation circuit 19
Generates a control (CTL) signal necessary for tracking servo during reproduction, and whether the NTSC signal of the second television system is recorded by supplying the recording mode selection signal MS to the current system. NTS
An identification signal is added to indicate whether the C signal is recorded. Hereinafter, such a control signal is referred to as an identification control signal. This identification control signal SCTL is
After being amplified by the recording amplifier 26, it is supplied to the magnetic head 27 and recorded on the control track of the magnetic tape 24.

The magnetic tape 24 travels while being obliquely wound around the outer periphery of the rotary cylinder 25 by the guide posts 22 and 23 over a predetermined range.

The luminance signal selected by the switch circuit 9 is
The recording luminance signal processing circuit 11 including at least the pre-emphasis circuit 12 and the frequency modulation circuit 13 performs a recording process to form a frequency-modulated luminance signal, and the color signal selected by the switch circuit 10 is at least The recording color signal processing circuit 14 including the low frequency conversion circuit 15 and the LPF 16 performs a recording process to form a low frequency conversion color signal, which is added by the addition circuit 17, respectively. The output signal of the adder circuit 17 is amplified by the recording amplifier 18, and then supplied to the magnetic heads 20 and 21 on the rotary cylinder 25 and recorded on the magnetic tape 24.

At the time of reproduction, the signal reproduced from the magnetic tape 24 by the magnetic heads 20 and 21 is amplified by the reproduction amplifier 29 and then supplied to the LPF 31 and the HPF 34, where L
The PF 31 extracts the low-frequency conversion color signal, and the HPF 34 extracts the frequency-modulated luminance signal.

The low-pass conversion color signal extracted by the LPF 31 is converted into the original high-pass color signal by the high-pass conversion circuit 32, and processed by the reproduction color signal processing circuit 33. On the other hand, the frequency-modulated luminance signal extracted by the HPF 34 is demodulated to a baseband luminance signal by the frequency demodulation circuit 35, de-emphasized by the de-emphasis circuit 36, and then processed by the reproduction luminance signal processing circuit 37 to output the luminance signal. The reproduction color signal processing circuit 3 is output from the addition circuit 38 while being output from the terminal 42.
It is added to the color signals from 3 and output to the video output terminal 41 as a video signal. The color signal from the reproduction color signal processing circuit 33 is output from the color signal output terminal 40 via the identification signal superimposing circuit 39.

The identification control signal SCTL reproduced from the magnetic tape 24 by the magnetic head 27 is used as a tracking servo signal (not shown) after being amplified by the reproduction amplifier 28 and supplied to the recording mode identification circuit 30. , The signal reproduced according to the identification signal included in the identification control signal SCTL is an NTSC signal of the second television system or N of the current system.
It is determined whether it is a TSC signal. The characteristics of the reproduction color signal processing circuit 33 and the reproduction luminance signal processing circuit 37 and the signal superposition circuit 39 are controlled according to the determination result of the recording mode identification circuit 30.

In the above configuration, first, the operation for recording and reproducing a video signal according to the second television system having an aspect ratio of 16: 9 and 525 scanning lines will be described.

The identification control signal SCTL reproduced from the magnetic tape 24 by the magnetic head 27 is supplied to the recording mode identification circuit 30, and whether the reproduced signal is the second television system NTSC signal as described above. ,
It is determined whether the current system is the NTSC signal. In this case, the recording mode identification circuit 30 outputs the identification control signal S
It is determined from the identification signal included in the CTL that it is the second television system NTSC signal, and the control signal CL corresponding to the determination result is output. By the control signal CL, the reproduction color signal processing circuit 33 and the reproduction luminance signal processing circuit 3
The characteristic of No. 7 is set to the characteristic according to the NTSC signal of the second television system, and a DC voltage is applied to the color signal in the identification signal superimposing circuit 39.

Thus, when a wide-screen television receiver having an aspect ratio of 16: 9 and 525 scanning lines is connected to the output terminals 40, 41, and 42, a wide-screen image is displayed on the entire display screen. To be done.

On the other hand, when the NTSC signal of the current system having the aspect ratio of 4: 3 is recorded / reproduced, the control signal CL from the identification signal superimposing circuit 39, which judges this, causes the identification signal superimposing circuit 39 to change the color. No DC voltage is applied to the signal, and the output configuration is the same as that of a conventional VTR.

FIG. 3 is a block diagram showing a specific example of the reproduction luminance signal processing circuit 37 in FIG.
Is an input terminal, 45 is an output terminal, 46 and 47 are delay circuits,
Reference numeral 48 is an adder circuit, 49 is a level setting circuit, and 50 is an adder circuit.

In the figure, the output luminance signal of the de-emphasis circuit 36 (FIG. 1) is supplied from the input terminal 43, and the control signal corresponding to the discrimination result of the recording mode discrimination circuit 30 (FIG. 1) is inputted from the input terminal 44. CL is supplied. The input luminance signal is delayed by the delay circuits 46 and 47, and the input luminance signal and the output luminance signals of the delay circuits 46 and 47 are added by the adding circuit 48. The output signal of the adding circuit 48 is set to a predetermined level by the level setting circuit 49, and then added with the output luminance signal of the delay circuit 46 in the adding circuit 50 and output as the output luminance signal of the reproduction luminance signal processing circuit 37. It is supplied from the terminal 45 to the output terminal 42 and the adder circuit 38 of FIG.

In FIG. 1, when an NTSC signal of the current system having an aspect ratio of 4: 3 is reproduced, the input terminal 44
The delay circuits 46 and 4 are controlled by the control signal CL input from
7 is set to T1, the frequency characteristic becomes the characteristic curve A shown in FIG. 4, and the waveform response characteristic is shown in FIG.
As shown in.

On the other hand, the aspect ratio is 16: 9 and the number of scanning lines is 5.
When 25 NTSC signals of the second television system are reproduced, the control signal C input from the input terminal 44
Due to L, the delay time of the delay circuits 46 and 47 is T2 (T1
> T2) and the frequency characteristics are as shown in FIG.
The characteristic curve B is emphasized on the higher frequency side of the characteristic curve A, and the waveform response characteristic is as shown in FIG.

As described above, the frequency enhancement characteristics of the NTSC signal of the second television system having the aspect ratio of 16: 9 and the number of scanning lines of 525 are the frequency enhancement characteristics of the NTSC signal of the current system having the aspect ratio of 4: 3. The horizontal resolution can be increased by setting it higher in the frequency region to be emphasized than the characteristic, and when a wide-screen television receiver is used by being connected to the output terminals 40, 41, 42 of FIG. As shown in FIG. 5, the width of the chute can be narrowed. As a result, the horizontal resolution can be increased only for the video signal of the wide television system that requires the horizontal resolution, and the horizontal resolution does not become excessively high when the television signal of the current system is used. It is possible to obtain an optimum video signal according to different television systems.

FIG. 6 is a reproduction color signal processing circuit 3 in FIG.
51 is a block diagram showing a part of one specific example of FIG.
52 is an input terminal, 53 is an output terminal, 54 and 55 are delay circuits, 56 and 57 are switch circuits, 58 is a differentiation circuit, and 59.
Is an absolute value conversion circuit, 60 is a differentiation circuit, and 61 is a waveform shaping circuit.

FIG. 8 is a waveform diagram showing the signals of the respective parts of FIG. 7, and the signals corresponding to those of FIG. 6 are designated by the same reference numerals.

This specific example will be described below, but here, the outline correction in the color difference signal obtained by demodulating the color signal will be described as an example.

In FIGS. 6 and 7, the high frequency converter 32 is shown.
The color signal from (FIG. 1) is demodulated by means (not shown) to become a color difference signal A, and this color difference signal A is input terminal 5
Input from 1. Further, the control signal CL from the input terminal 52 according to the discrimination result of the recording mode discrimination circuit 30 (FIG. 1).
Is supplied. The input color difference signal A is delayed by the delay circuit 54,
The output color difference signals F and G of the delay circuits 54 and 55 are supplied to the a side and the b side of the switch circuit 56, respectively. The selected color difference signal on the side a or the side b of the switch circuit 56 is supplied to the side a of the switch circuit 57, and the input color difference signal A is supplied to the side b of the switch circuit 57.

Further, the output color difference signal F of the delay circuit 54 is differentiated by the differentiating circuit 58, and the positive part thereof is the absolute value converting circuit 5.
The differential signal B is extracted and absolute valued in 9, and the differential signal B is further differentiated in the differential circuit 60 to obtain the secondary differential signal C. The waveform of the secondary differential signal C is shaped by the waveform shaping circuit 61, and the control signal D in which the positive part of the secondary differential signal C is shaped and the control signal E in which the negative part of the secondary differential signal C is shaped are obtained.

The switch circuit 56 is switch-controlled by the control signal D, and the switch circuit 57 is switch-controlled by the control signal E. That is, the switch circuit 56 selects the delayed color difference signal G on the b side for the period of the control signal D, and the delayed color difference signal on the a side for a period other than the period of the control signal D, and the switch circuit 57 selects the control signal E. , The delayed color difference signal from the switch circuit 56 on the a side is selected as the input color difference signal A on the b side during a period other than the period of the control signal E.

When reproducing the NTSC signal of the current system having the aspect ratio of 4: 3 in FIG. 1, the delay time of the delay circuits 54 and 55 is set to T3 by the control signal inputted from the input terminal 52. The color difference signal H is obtained from the input color difference signal A, and the contour is improved. On the other hand, the aspect ratio is 16:
9, the second television system NT with 525 scanning lines
When the SC signal is reproduced, the delay time of the delay circuits 54 and 55 is set to T4 (T3 <T4) by the control signal input from the input terminal 52. This increases the contour correction amount.

In this way, the amount of contour correction can be increased in the case of a wide television system signal which requires horizontal resolution, and the amount of contour correction is excessive in the case of the NTSC signal of the current system. Without increasing
It is possible to output an optimum video signal according to two different television systems.

FIG. 8 is a block diagram showing a second embodiment of the wide television signal recording / reproducing apparatus according to the present invention.
Reference numeral 2 is a discrimination control circuit, 63 is a vertical filter, 64 and 65 are switch circuits, and 66 is an input terminal. The parts corresponding to those in FIG.

In the figure, at the time of reproduction, the color signal processed by the reproduction color signal processing circuit 33 is directly supplied to the side b of the switch circuit 64, and also processed by the vertical filter 63 to the side a of the switch circuit 64. Is supplied to. The brightness signal processed by the reproduction brightness signal processing circuit 37 is directly supplied to the b side of the switch circuit 65, processed by the vertical filter 63 and supplied to the a side of the switch circuit 65. The vertical filter 63 processes the video signal of the second television NTSC signal so as to remove the deformation of at least a part of the original image.

The color signal selected by the switch circuit 64 and the brightness signal selected by the switch circuit 65 are added by the adder circuit 38 and output from the output terminal 41 as a video signal, and the brightness signal is output from the output terminal 42. The color signal is processed by the identification signal superimposing circuit 39 as described above and output from the output terminal 40.

On the other hand, from the input terminal 66 to the output terminals 40 to 4
A display device identification signal indicating whether the television receiver connected to 2 is of a high-definition type or a current type is input, and in accordance with this identification signal, as described above, the reproduction color signal processing circuit 33 and Reproduction luminance signal processing circuit 3
7 characteristics are controlled.

The discrimination control circuit 62 controls the switch circuits 64 and 65 and the discrimination signal superposition circuit 39 according to the display device discrimination signal input from the input terminal 66 and the output signal of the recording mode discrimination circuit 30.

Therefore, an NTSC signal of the second television system having an aspect ratio of 16: 9 and 525 scanning lines is recorded and reproduced from the magnetic tape 24, and the output terminals 40 to 40
When the television receiver to which the reproduction signal is supplied from 42 is of the current system having an aspect ratio of 4: 3, the recording mode identification circuit 31 identifies that the reproduction signal is the second television system NTSC signal. On the other hand, on the other hand, since the display device identification signal input from the input terminal 66 indicates that the television receiver is of the current system with the aspect ratio of 4: 3, the discrimination control circuit 62 is the switch circuit. 64 and 65 are closed to the a side, and the luminance signal and the color signal processed by the vertical filter 63 are selected. Therefore, the luminance signal and the chrominance signal supplied to the television receiver have been processed by the vertical filter 63.

Here, the vertical filter 63 converts the second television system NTSC signal having an aspect ratio of 16: 9 and 525 effective pixel scanning lines into an aspect ratio of 16: 9.
The video signal is converted into a video signal with 360 effective pixel scanning lines, which allows an image with an aspect ratio of 16: 9 to have an aspect ratio of 4: 3 as shown in FIG. It will be displayed without distortion on the display screen in letterbox mode with the perfect circularity.

The vertical filter 6 is composed of the switch circuits 64 and 65.
It is thus possible to select the luminance signal and the chrominance signal processed by 3 from the aspect ratio 16: 9,
Second television system NTSC with 525 scanning lines
This is only when the television receiver for recording and reproducing the signal and displaying the reproduced signal is of the current system having an aspect ratio of 4: 3. In other cases, the discrimination control circuit 32 causes the switch circuit 64 to operate. , 65 selects the b side.

Here, the reproduction luminance signal processing circuit 37 is shown in FIG.
In this case, the control signal input from the input terminal 44 in FIG. 3 is the display device identification signal input from the input terminal 66 in FIG. Therefore, when the connected television receiver is a wide screen television receiver having an aspect ratio of 16: 9, the characteristics of the reproduction luminance signal processing circuit 37 are the frequency characteristics B and 5 shown in FIG. The waveform response characteristics shown in (b) are obtained, and the connected television receiver has an aspect ratio of 4:
In the case of the current type 3 television receiver, the frequency characteristic A shown in FIG. 4 and the waveform response characteristic shown in FIG. As a result, the horizontal resolution can be increased only when a wide-screen television receiver that requires horizontal resolution is connected, and when the current-type television receiver is connected, the horizontal resolution is increased. It does not become too high.

The reproduction color signal processing circuit 33 in FIG. 8 has the structure shown in FIG. 6, but in this case, the control signal input to the input terminal 52 in FIG. 6 is input from the input terminal 66 in FIG. It is a display device identification signal that is input. Therefore, the characteristics of the reproduction color signal processing circuit 33 are such that when the connected television receiver is a wide-screen television receiver having an aspect ratio of 16: 9, the delay circuit 54,
If the delay time of 55 is set to T4 and the connected television receiver is a current television receiver having an aspect ratio of 4: 3, the delay time of the delay circuits 54 and 55 is T3 (T3 <T4 ) Will be set. As a result, the contour correction amount can be increased only when a wide-screen television receiver that requires horizontal resolution is connected, and when the current-type television receiver is connected, the contour correction amount can be increased. Do not overdo it.

FIG. 10 is a block diagram showing a third embodiment of the wide television signal recording / reproducing apparatus according to the present invention.
Reference numeral 67 is a vertical / horizontal filter, and 68 is a display range control input terminal. The parts corresponding to those in FIG.

In this embodiment, as shown in FIG.
In the embodiment shown in FIG. 7, a vertical / horizontal filter 67 is used instead of the vertical filter 63, and the characteristics of the vertical / horizontal filter 67 are controlled by a display range control signal from the input terminal 50. The configuration other than this is the same as that of the embodiment shown in FIG.

If the image by the NTSC signal of the second television system having an aspect ratio of 16: 9 and 525 effective pixel scanning lines is as shown in FIG. 11A, the characteristics of the vertical / horizontal filter 67 are By the display range control signal from the terminal 68, the number of effective pixel scanning lines is set to 360 by the scanning line number conversion process, and as shown in FIG. , Fig. 11
As shown in (c), it is possible to switch to a characteristic in which both sides of the image are cut and the central portion of the image is stretched in the horizontal direction (horizontal direction).

Here, this display range control signal is in accordance with the user's operation, and therefore the aspect ratio 16:
9. When an NTSC signal of the second television system having 525 effective pixel scanning lines is reproduced, there is a non-image part at the top and bottom as shown in FIG. 11B according to the user's preference. , It is possible to select whether to display a wide image, or to display the image on the full display screen although both sides are missing, as shown in FIG. 11C, without affecting the recording medium. it can.

[0058]

As described above, according to the present invention,
When reproducing two types of video signals with different aspect ratios and outputting the video signals to two types of display devices with different aspect ratios, by switching the characteristics of the reproduced video signals according to the aspect of the display device. , The optimum characteristics can be set for each.

According to the present invention, the aspect ratio is 1
When recording / reproducing a signal of 6: 9 and outputting a video signal to a display device having an aspect ratio of 4: 3, the user operates the
Whether there is a non-image part at the top and bottom but a wide image is displayed, or whether both sides are missing but a full screen image is displayed,
It can be selected at the time of reproduction without affecting the recording medium.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a wide television signal recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram showing a display image by a video signal converted from an HDTV signal to an NTSC signal in the embodiment shown in FIG.

3 is a block diagram showing a specific example of a reproduction luminance signal processing circuit in FIG.

FIG. 4 is a diagram showing frequency characteristics for each television system in the specific example shown in FIG.

5 is a diagram showing waveform response characteristics for each television system in the specific example shown in FIG.

6 is a block diagram showing a specific example of a reproduction color signal processing circuit in FIG.

FIG. 7 is a waveform diagram showing signals of respective parts of FIG.

FIG. 8 is a block diagram showing a second embodiment of the wide television signal recording / reproducing apparatus according to the present invention.

FIG. 9 is a diagram showing a display image by a video signal converted from an HDTV signal to an NTSC signal in the embodiment shown in FIG.

FIG. 10 is a block diagram showing a third embodiment of a wide television signal recording / reproducing apparatus according to the present invention.

11 is a diagram showing a display image by a video signal converted from an HDTV signal to an NTSC signal in the embodiment shown in FIG.

[Explanation of symbols]

 1 Input terminal for identification signal 2 Input terminal for reception signal of satellite broadcasting 3 Input terminal for reception signal of terrestrial broadcasting 4 BS tuner 5 MUSE / NTSC signal processing circuit 6 TV tuner 7 switch circuit 9, 10 switch circuit 11 recording luminance signal Processing circuit 14 Recording color signal processing circuit 19 Identification control signal generating circuit 20, 21 Magnetic head 24 Magnetic tape 27 Magnetic head 30 Recording mode identification circuit 33 Reproduction color signal processing circuit 37 Reproduction luminance signal processing circuit 38 Addition circuit 39 Identification signal superposition circuit 40 to 42 Output terminal 62 Discrimination control circuit 63 Vertical filter 64, 65 Switch circuit 66 Input terminal for display device identification signal 67 Vertical / horizontal filter 68 Input terminal for display range control signal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location H04N 9/80 H04N 7/00 Z 9/80 A (72) Inventor Yagushi Fumishige Katsuta, Ibaraki Prefecture 1410 Inada, Ichi, Japan, Hitachi, Ltd. AV Equipment Division

Claims (8)

[Claims] 1. Aspect ratio 16: 9, number of scanning lines 112
A system conversion means for converting five first television system video signals into a second television system video signal having an aspect ratio of 16: 9 and a scanning line number of 525 different from this, and a second system Recording / reproducing means for selecting a television system video signal and a current television system video signal having an aspect ratio of 4: 3 and 525 scanning lines as a recording signal, and recording / reproducing on / from a recording medium; An identification signal for discriminating whether the recording signal is the video signal of the second television system or the video signal of the current television system is recorded on the recording medium and reproduced, and reproduced by the recording / reproducing means. Recording mode identification means for identifying whether the video signal is the video signal of the second television system or the video signal of the current television system by the reproduced identification signal, and the judgment of the recording mode identification means. A characteristic according to another result is set, first means for processing the reproduced video signal with the set characteristic and outputting to a connected display device, and an identification result of the recording mode identification means. A wide television signal recording / reproducing apparatus having identification output means for outputting to the display device. 2. Aspect ratio 16: 9, number of scanning lines 112
A system conversion means for converting five first television system video signals into a second television system video signal having an aspect ratio of 16: 9 and a scanning line number of 525 different from this, and a second system Recording / reproducing means for selecting a television system video signal and a current television system video signal having an aspect ratio of 4: 3 and 525 scanning lines as a recording signal, and recording / reproducing on / from a recording medium; An identification signal for discriminating whether the recording signal is the video signal of the second television system or the video signal of the current television system is recorded on the recording medium and reproduced, and reproduced by the recording / reproducing means. Recording mode identification means for identifying whether the video signal is the video signal of the second television system or the video signal of the current television system by the reproduced identification signal, and the identification of the recording mode identification means. Another result is that the connected display device is based on the second television system having an aspect ratio of 16: 9 and 525 scanning lines, or the current television having an aspect ratio of 4: 3 and 525 scanning lines. Identification control means to which a display device identification signal indicating whether the display system identification signal is supplied and a characteristic according to the display device identification signal are set, and the reproduced video signal is processed with the set characteristic. The first means, and the first means for removing at least a part of the deformation of the original image generated when an image is displayed on the display device according to the current method by the video signal of the second television method. Second means for processing the video signal processed by the above, and the video signal reproduced by being controlled by the identification control means is the video signal of the second television system, and the display device is currently in use. Only when those according to formula, selects the output video signal of said second means, when other than this,
A selection means for selecting the output video signal of the first means and supplying it to the display device, an identification output means for supplying the output of the identification control means to the display device, and an identification result of the recording mode identification means are displayed. A wide television signal recording / reproducing apparatus comprising: an identification output unit for outputting to the apparatus. 3. Aspect ratio 16: 9, number of scanning lines 112
A system conversion means for converting five first television system video signals into a second television system video signal having an aspect ratio of 16: 9 and a scanning line number of 525 different from this, and a second system Recording / reproducing means for selecting a television system video signal and a current television system video signal having an aspect ratio of 4: 3 and 525 scanning lines as a recording signal, and recording / reproducing on / from a recording medium; An identification signal for discriminating whether the recording signal is the video signal of the second television system or the video signal of the current television system is recorded on the recording medium and reproduced, and reproduced by the recording / reproducing means. Recording mode identification means for identifying whether the video signal is the video signal of the second television system or the video signal of the current television system by the reproduced identification signal, and the identification of the recording mode identification means. According to another result, whether the connected display device is based on the second television system having an aspect ratio of 16: 9 and 525 scanning lines, or an existing television having an aspect ratio of 4: 3 and 525 scanning lines. Identification control means to which a display device identification signal indicating whether the display system identification signal is supplied and a characteristic according to the display device identification signal are set, and the reproduced video signal is processed with the set characteristic. First means, second means capable of processing the output video signal of the first means, and selectively changing the display form of the image, and reproduced by being controlled by the identification control means. The output video signal of the second means is selected only when the video signal is the video signal of the second television system and the display device is based on the current system, and otherwise. ,
Selection means for selecting the output video signal of the first means and supplying it to the display device, identification output means for superimposing the output of the identification control means and supplying it to the display device, and identification of the recording mode identification means A wide-screen television signal recording / reproducing device, comprising: an identification output unit for outputting the result to a display device. 4. The first frequency enhancement characteristic for the luminance signal of the video signal of the second television system, and the current television system according to claim 1, 2, or 3. And a second frequency emphasis characteristic for the luminance signal of the video signal are switched and set, and the frequency area emphasized in the first frequency emphasis characteristic is set to the frequency area emphasized in the second frequency emphasis characteristic. Wide TV signal recording / reproducing device characterized by being made higher than. 5. The method according to claim 1, wherein the first means includes a first contour correction characteristic for a color signal of a video signal of the second television system and the current television system. The wide television signal recording / reproducing apparatus characterized in that the second contour correction characteristic for the color signal of the video signal is switched and set, and the first contour correction amount is made larger than the second contour correction amount. . 6. The first means according to claim 1, 2 or 3, wherein the first means has a first frequency enhancement characteristic for a luminance signal of a video signal of the second television system and the current television system. Second for luminance signal of video signal
And the frequency emphasis characteristic of the second
The first contour correction characteristic for the color signal of the television system video signal and the second contour correction characteristic for the color signal of the current television system video signal are set to be switched, The frequency range to be emphasized in the frequency emphasis characteristic is made higher than the frequency range to be emphasized in the second frequency emphasis characteristic, and the first contour correction amount is set to be larger than the second contour correction amount. Characteristic wide-screen TV signal recording / reproducing device. 7. The aspect ratio according to claim 2, wherein the aspect ratio of the second television system video signal is 16:
9. A wide television signal recording / reproducing apparatus having means for converting into a video signal of a third television system having 360 effective pixel scanning lines. 8. The means according to claim 3, wherein the second means converts the video signal of the second television system so that the display image is vertically compressed. A means for performing a conversion process on the video signal of the television system of No. 2 so that both sides of the image are cut and expanded in the horizontal direction to form an image having an aspect ratio of 4: 3, and these two means are selectively used. A wide television signal recording / reproducing apparatus comprising: means for switching to.