JP4604315B2 - Television receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a television receiver incorporating a video disk playback device such as a DVD.
[0002]
[Prior art]
FIG. 9 relates to a conventional television receiver with a reproducing apparatus.
In FIG. 9, 1 is a TV input, 2 is a video input with S1 signal detection, 3 is an AV input selector switch AVSW, 4 is an RGB processor, 5 is a display, 6 is an audio controller, 7 is a speaker, 8 is a control unit, 9 is an operation key input unit, and 10 is a video CD playback device.
[0003]
Hereinafter, the operation will be described with reference to FIG.
[0004]
In the conventional example of FIG. 9, a video CD playback device is incorporated in a television receiver.
[0005]
The TV input 1 and the video input 2 are input to the AVSW 3. The control unit 8 switches the input of the AVSW 3 according to the input of the operation key and supplies the video signal and the audio signal to the RGB processor 4 and the audio controller. The RGB processor 4 converts the video signal from the AVSW 3 into an RGB signal, drives the display 5 and displays the screen.
[0006]
Similarly, the audio controller 6 controls the audio signal from the AVSW 3 and supplies it to the speaker 7 for audio output. When the video CD playback device 10 is selected by the user through the operation key input unit 9, the control unit 8 performs drive control on the video CD playback device 10 and simultaneously switches the AVSW 3 to the video CD playback device 10 side.
[0007]
When the user wants to switch to the TV input and view the broadcast contents during video CD playback, the control unit 8 sends a pause signal to the video CD playback device 10 when the user operates the operation key input unit 9. And switch AVSW3 to TV input 1. Thereafter, when the user performs an operation of switching the AVSW 3 to the original video CD playback device 10, the control unit 8 toggles from the TV input 1 to the video input 2 and further switches to the video CD playback device 10. On the other hand, a signal for canceling the pause is sent to start reproduction from the place where the AVSW is switched.
[0008]
Alternatively, even when the AVSW 3 is switched, there may be a case where the reproduction is continued as it is without issuing a pause signal to the video CD reproducing apparatus 10.
[0009]
[Problems to be solved by the invention]
The above conventional example is based on a television receiver with a reproducing apparatus disclosed in Japanese Patent Laid-Open No. 7-240882.
[0010]
It is assumed that a general television broadcast or a video of a typical video package medium is displayed on a display having an aspect ratio of 4: 3. On the other hand, it is assumed that a receiver for HDTV broadcasting such as high-definition is displayed on a display having an aspect ratio of 16: 9. On the other hand, a so-called wide TV having no HDTV reception function but having a display with an aspect ratio of 16: 9 has been commercialized.
[0011]
There is an S1 video signal as a signal that makes use of the functions of such a wide TV. The S1 video signal is also called a squeeze signal, and is a signal having a roundness of 1 when displayed on a display having an aspect ratio of 16: 9. When such a signal is displayed on a screen with a normal aspect ratio of 4: 3, it becomes a vertically long image. This display image is shown in FIG.
[0012]
When a 4: 3 aspect ratio display is used to display a 16: 9 aspect ratio screen, the original feed signal has black frames at the top and bottom of the screen, and there are approximately 480 effective scanning lines. The number of scanning lines effective for display is about 360. This display image is shown in FIG.
[0013]
For example, when a squeeze signal is displayed on a wide TV of about 24 inches and an aspect ratio of 16: 9, and a normal TV of about 29 inches and an aspect ratio of 4: 3 has black frames at the top and bottom as shown in FIG. When the signal is displayed, the area in which the effective video is actually displayed is almost the same. However, the wide TV has 480 effective scanning lines and the normal TV has 360 effective scanning lines. It will be better.
[0014]
In a television receiver with a reproducing apparatus as shown in the conventional example, the video CD originally does not correspond to the aspect of the squeeze signal and does not correspond to the squeeze signal with higher quality. Video CDs and other images are originally assumed to be viewed on a 4: 3 aspect ratio screen. Therefore, in such a conventional example, a squeeze signal format signal cannot be correctly reproduced. Therefore, in order to view an image having an aspect ratio of 16: 9 with such a television receiver, it is necessary to select an image signal with black frames at the top and bottom in advance.
[0015]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes the following means.
[0016]
The first television receiver is a television receiver for displaying an AV signal from a video disk on a display, a reading aspect ratio register for storing an aspect ratio of the AV signal read from the video disk, and the video When a video disk stores an aspect ratio of 16: 9 in the readout aspect ratio register, the deflection angle of the AV signal is switched by the deflection means to switch the deflection angle of the AV signal from the disk. Control means for controlling the display of an image with an aspect ratio of 16: 9 on a screen with a ratio of 4: 3, and when the deflection angle is switched, an OSD is used to arbitrarily set the boundary between the image signal and no signal A television receiver comprising on-screen means for horizontally writing display characters of a black block having a size.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
The first television receiver is a television receiver for displaying an AV signal from a video disk on a display, a reading aspect ratio register for storing an aspect ratio of the AV signal read from the video disk, and the video When a video disk stores an aspect ratio of 16: 9 in the readout aspect ratio register, the deflection angle of the AV signal is switched by the deflection means to switch the deflection angle of the AV signal from the disk. Control means for controlling the display of an image with an aspect ratio of 16: 9 on a screen with a ratio of 4: 3, and when the deflection angle is switched, an OSD is used to arbitrarily set the boundary between the image signal and no signal A television receiver comprising on-screen means for horizontally writing display characters of a black block having a size.
[0026]
Embodiments of the television receiver of the present invention will be described below based on the embodiments shown in FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to what has the effect | action similar to what was shown in FIG. 9 which shows a prior art example.
[0027]
(Embodiment 1)
FIG. 1 shows Embodiment 1 of the present invention.
[0028]
In addition, those having the same number have already been described in function, and the description thereof will be omitted.
[0029]
In FIG. 1, reference numeral 8a denotes a control unit that performs various control processes.
11a is a video disc playback device for playing back video discs,
12 is a disk control unit that performs various disk controls for driving the video disk;
13 is an aspect ratio setting register for setting the read aspect ratio of the video disc;
14 is a read aspect ratio register for sequentially storing the aspect ratio read from the video disc;
15 is such that the vertical deflection signal read out from the RGB processor is vertically scanned to fill the display 5 at the normal time when the aspect ratio is 4: 3, and when the aspect ratio is 16: 9. , A deflection circuit that can switch the vertical amplitude angle of the vertical deflection signal constant so that it can be displayed with the correct roundness,
20 is an AV decoder for processing an AV signal from the video disc;
A disk data reading unit 30 reads data from a video disk.
[0030]
A detailed block diagram of the AV decoder 20 is shown in FIG.
[0031]
In FIG. 2, reference numeral 21 denotes an SDRAM which is a 16 MB memory used for data reproduction.
22 is a video decoder for decoding MPEG data, MP @ ML,
23 is an audio decoder for decoding various audio signals AC3, MPEG, and linear PCM;
24 is an NTSC decoder for converting a signal from the video decoder 22 into an NTSC signal;
25 is a DAC that converts a digital signal from an NTSC encoder into an analog signal;
A DAC 26 converts a digital signal from the audio decoder 23 into an analog signal.
[0032]
A detailed block diagram of the disk data reading unit 30 is shown in FIG.
[0033]
In FIG. 3, reference numeral 31 denotes a spindle motor for driving the disk,
32 is a motor driver for driving the spindle motor,
33 is an optical pickup for reading data from a video disc;
34 is a head amplifier for amplifying the signal from the optical pickup;
35 is a signal processing unit for converting the signal from the head amplifier into a digital signal,
36 is a disk servo controller for controlling the rotation of the disk based on the signal read from the head amplifier 34;
Reference numeral 37 denotes a descrambler for descrambling the signal from the scrambled signal processing unit 35.
[0034]
Hereinafter, a description will be given based on FIG. The operation key input unit 9 sets the aspect ratio setting register 13 in the video disk playback device 11a to an aspect ratio of 16: 9 or an aspect ratio of 4: 3. When the aspect ratio is set to 16: 9, it is possible to read from the video disc a video signal that is displayed correctly with an aspect ratio of 16: 9 with about 480 effective scanning lines.
[0035]
On the other hand, when the aspect ratio is set to 4: 3, a video signal correctly displayed at an aspect ratio of 4: 3 with about 480 effective scanning lines can be read from the video disk. In this case, a so-called letterbox signal form, that is, the number of effective scanning lines is about 480, and a signal indicating a black frame is sent to about 60 scanning lines above and below, and a video signal other than a black frame is sent to the central 360 scanning lines. It is done.
[0036]
Alternatively, a so-called pan-scan signal form, that is, the number of effective scanning lines is about 480, and the vertical width is the same as that of the original 16: 9 signal without any black frame signals being up and down, and 12: 9 (4: The video signal obtained by cutting out the video signal is sent as shown in 3). The disc data reading unit 30 reads whether the signal form recorded on the video disc has an aspect ratio of 16: 9 or an aspect ratio of 4: 3.
[0037]
The read aspect ratio register 14 stores the aspect ratio of the signal read from the video disk. However, some video disks do not have a signal form with an aspect ratio of 16: 9, and the aspect ratio setting register 13 has the aspect ratio. Even if 16: 9 is set, the aspect ratio 16: 9 may not be recorded in the read aspect ratio register 14. When the aspect ratio 16: 9 is set in the aspect ratio setting register 13 and the aspect ratio 16: 9 read from the video disk is recorded in the read aspect ratio register 14, the disk control unit 12 uses the communication means to transmit the contents thereof. It transmits to the control part 8a.
[0038]
When detecting the aspect ratio 16: 9, the control unit 8a sets the deflection circuit 15 to reduce the vertical deflection angle so that an image with an aspect ratio of 16: 9 is displayed correctly. When detecting the aspect ratio 4: 3, the control unit 8a sets the setting of the deflection circuit 15 so that an image with an aspect ratio of 4: 3 is correctly displayed in the same manner as other normal signals.
[0039]
(Embodiment 2)
FIG. 4 shows a second embodiment of the present invention.
[0040]
In addition, the same code | symbol is attached | subjected and demonstrated to FIG. 9 which shows an example, and the thing which carries out the same effect | action as FIG.1, FIG.2 and FIG.3 of an Example. In addition, those having the same number have already been described in function, and the description thereof will be omitted.
[0041]
16 is an auto aspect for selecting whether or not to match the aspect ratio of the display screen by automatically switching the deflection angle when conditions for switching the deflection angle to 16: 9 are met. It is a register.
[0042]
This will be described below with reference to FIG.
[0043]
The aspect ratio setting register 13 sets the aspect ratio 16: 9 from the operation key input section 9, the disk data reading section 30 reads the aspect ratio 16: 9 from the video disk to be reproduced, and the read aspect ratio register 14 reads the aspect ratio. Even in the case of 16: 9, whether or not the deflection angle is automatically switched can be set by the setting of the auto aspect register 16.
[0044]
The aspect ratio setting is performed on the video disk playback unit 11a. However, the auto aspect register 16 is performed on the playback video here, and has an advantage that the switching of the aspect ratio can be selected more freely.
[0045]
(Embodiment 3)
FIG. 5 shows a third embodiment of the present invention.
[0046]
Note that the same reference numerals are used in the description of the conventional example shown in FIG. 9 and the components having the same functions as those in FIGS. 1, 2, 3 and 4 of the embodiment. In addition, those having the same number have already been described in function, and the description thereof will be omitted.
[0047]
Reference numeral 17 denotes an OSD which is an on-screen means for masking a switching portion between a non-signal portion and a signal portion generated on the display when the deflection angle is reduced.
[0048]
A display example when the deflection angle is switched to the aspect ratio of 16: 9 is shown in FIG. In this case, depending on the performance of the hardware to be used, a troublesome synchronization switching point different from the video display, various problems of synchronization pull-in, etc. may be displayed at the boundary between the black frame and the video signal. In order to solve this problem, the control unit 8a can improve this defect display by writing the display character of the black block of an arbitrary size in the horizontal direction at the boundary using the OSD 17.
[0049]
(Embodiment 4)
FIG. 7 shows a fourth embodiment of the present invention.
[0050]
In FIG. 9, which shows the conventional example, and those having the same functions as those of FIGS. 1, 2, 3, 4, 5, and 6 of the embodiment, the same reference numerals are used for description. In addition, those having the same number have already been described in function, and the description thereof will be omitted.
[0051]
Reference numeral 18 denotes a blanking signal generation circuit for masking a switching portion between a non-signal portion and a signal portion generated on the display when the deflection angle is reduced.
[0052]
FIG. 6 shows a display example when the deflection angle is switched to an aspect ratio of 16: 9. In this case, depending on the performance of the hardware used, the display differs from the video display at the boundary between the black frame and the video signal. In some cases, a troublesome synchronization switching point, problems of synchronization pull-in, etc. may be displayed. In order to solve this problem, in order to reduce the burden on the control unit 8a, a necessary signal as a video signal is output to the display 5 by a blanking signal without an on-screen operation from the control unit 8a.
[0053]
The blanking generation circuit receives a synchronization signal from the RGB processor 4, generates a blanking signal by processing the synchronization signal, and returns the signal to the RGB processor 4, thereby supplying a defective signal to the display 5. To lose.
[0054]
(Embodiment 5)
FIG. 8 shows a fifth embodiment of the present invention.
[0055]
9 showing the conventional example, and those having the same functions as those of FIGS. 1, 2, 3, 4, 5, 6, and 7 of the embodiment are denoted by the same reference numerals. . In addition, those having the same number have already been described in function, and the description thereof will be omitted.
[0056]
19 detects an arbitrary voltage (normally 5V) superimposed on the color signal portion when the S1 video signal is detected. The present invention provides not only a video signal for reproducing a video disk having a built-in deflection angle switching function but also a video signal from an external device.
[0057]
The luminance signal and the color signal are separated and input to the video signal input unit with S1 detection. At this time, when the voltage indicating the S1 video signal of the color signal is superimposed, the control unit 8a immediately detects it and the deflection angle of the deflection circuit 15 when the video signal having an aspect ratio of 16: 9 is input. By setting to, the same effect as that of the internal video disk can be obtained for external signals.
[0058]
【The invention's effect】
According to this research, the following effects are obtained.
[0059]
According to the first aspect of the present invention, it is possible to cope with a squeeze signal having an aspect ratio of 16: 9 that has not been provided in a conventional TV with a built-in video CD playback function, and the aspect ratio is set inside the television receiver. In addition, the deflection angle of the deflection circuit can be switched automatically by communicating the detection of the aspect ratio between the two control units, and the number of operation lines on the screen with an aspect ratio of 4: 3 is not lost. An effect that a video signal having an aspect ratio of 16: 9 can be displayed can be obtained.
[0060]
According to the invention described in claim 2, by using the auto aspect register, it is possible to obtain an extremely excellent effect that the aspect ratio can be instantaneously switched for each required video disk.
[0061]
According to the third aspect of the present invention, it is possible to obtain an effect that the fault display at the boundary between the black frame portion on the display screen and the video signal can be erased by performing on-screen masking by OSD.
[0062]
According to the fourth aspect of the present invention, the burden of the OSD writing of the control unit is reduced, and the video signal itself is blanked by the generation of the blanking signal by the synchronization signal, so that the boundary between the black frame portion on the display screen and the video signal is obtained. It is possible to obtain an effect that it is possible to turn off the trouble display.
[0063]
According to the fifth aspect of the present invention, the deflection angle of the deflection circuit can be automatically switched even with respect to an external signal by having a video input unit with S1 detection. A video signal with an aspect ratio of 16: 9 can be displayed on the screen of 3: 3 without detracting from the number of operation lines.
[Brief description of the drawings]
FIG. 1 is a block diagram of a display device according to a first embodiment. FIG. 2 is a detailed block diagram of an AV decoder according to a first embodiment. FIG. 3 is a detailed block diagram of a disk data reading diagram according to a first embodiment. FIG. 5 is a block diagram of a display device according to a second embodiment. FIG. 5 is a block diagram of a display device according to a third embodiment. FIG. 6 is a diagram showing a display example of the present invention. FIG. 8 is a block diagram of the display device in the fifth embodiment. FIG. 9 is a block diagram of the display device in the conventional example. FIG. 10 is an explanatory diagram of a squeeze signal. Figure showing a display example of a book (a so-called letterbox signal)
11 Video Disc Playback Unit 12 Disc Control Unit 13 Aspect Ratio Setting Register 14 Reading Aspect Ratio Register 15 Deflection Circuit 16 Auto Aspect Register 17 OSD
18 Blanking generation circuit 19 Video input unit with S1 detection 20 AV decoder 21 SDRAM
22 MPEG2 MP @ ML Video decoder 23 AC3 / MPEG / Linear PCM audio decoder 24 NTSC encoder 25 DAC (for video signal)
26 DAC (for audio signals)
30 Disc Data Reading Unit 31 Spindle Motor 32 Motor Driver 33 Optical Pickup 34 Head Amplifier 35 Signal Processing Unit 36 Disk Servo Control 37 Descrambler

Claims (1)

A television receiver for displaying an AV signal from a video disc on a display,
A read aspect ratio register for storing the aspect ratio of the AV signal read from the video disc;
Deflection means for switching the deflection angle of the AV signal from the video disc;
When a video disk stores an aspect ratio of 16: 9 in the readout aspect ratio register, the deflection angle of the AV signal is switched by the deflecting unit, and an image with an aspect ratio of 16: 9 is displayed on a screen with an aspect ratio of 4: 3. Control means for performing control to display
A TV comprising on-screen means for horizontally writing a display character of a black block of an arbitrary size at a boundary between a video signal and no signal using the OSD when the deflection angle is switched. John receiver .

Images