JPH027685A - Television receiver - Google Patents

Abstract

PURPOSE:To observe a picture part thrown away in the case of conversion of the system into the standard system on a reproduced pattern by displaying a reduced pattern of the high definition system onto a reproduced pattern of a video signal of the standard system converted from that of the high definition system. CONSTITUTION:A frame memory 15 stores one pattern of a picture data sent from a buffer memory 14 and read by a speed at a multiple of K of the data readout speed from the frame memory 14 by using the readout signal of a memory control section 16 and converted into a reduced pattern signal. A switch 17 uses a switching signal of a switch control section 18 so as to switch the video signal from a frame memory 13 into a video signal of the reduced pattern from the frame memory 15 and a synthesized video data subject to time division multiplex is outputted so that the pattern of the entire reduced MUSE system video signal whose longitudinal and lateral sizes are reduced respectively into 1/K to a prescribed position of the reproduced pattern. Thus, in the case of converting the high definition video signal into the video signal of the standard system, the entire pattern of high definition broadcast is observed.

Description

[Detailed Description of the Invention] [Industrial Application Field J] This invention receives high-definition television broadcasts of different formats and generates images on a television receiver of the current standard format of television broadcasts. television reception (ri)
Regarding equipment.

[Prior art] NTS is one of the standard methods for current television broadcasting.
High-definition television signal with wider bandwidth than ClJ type
M LJ S is one of the methods for reducing the band Ir and transmitting.
17: (MulLiple 5ub-Nyquist
A sampling 14ncoding system has been proposed by eight broadcasting associations. Also, this M tJ
SL two-system television (+1; replace J with the current N)
The system conversion device to enable tri-viewing on a TSC system receiver is the 1MUsl': system reception standard system adapter (hereinafter referred to as rMjJSE-Ni'S).
C conversion device” or 1i1- [referred to as conversion device J)
Television' in 1984 from the Japan Broadcasting Corporation.
? It has been reported at the meeting. As shown in Fig. 5, this conversion device performs aspect conversion that cuts off the top and bottom, left and right sides of a screen with an aspect ratio of 3:5 (hereinafter referred to as ``wide aspect screen''), and converts 1050 scanning lines into 525.
This converter converts the number of scanning lines to be thinned out in a book, and the configuration of this converter is shown in FIG.

In the figure, (1) is band-compressed M LJ S I
:, input terminal of the system video signal, (2) is a human power section consisting of a de-emphasis circuit, a clamp circuit and an A/D converter, (3) is a synchronization section, and (4) is detected at the synchronization section (3). A control signal generator that generates a control signal from a synchronization signal (
5) is a two-dimensional interpolation filter, (6) is a time axis conversion unit, (
7) is a frame memory processing unit, (8) is a motion detection unit, (
9) is a mixed part of dynamic region and static IL region, (10) is Y
Signal separation/C (No. 11 decoding section, (11) is an output section consisting of a D/A converter, LPF and inverse matrix circuit, (12) is NTS C system R, G.

This is an output terminal for the B video signal.

Next, the operation of this conversion device will be explained. Human Resources Department (2
), the input terminal (1) performs A/D conversion of the input MtJSE video signal, the synchronization section (3) detects the synchronization signal and performs phase synchronization, and the control unit No. 11 generation section (4) performs the following: M
Creates IJS Iζ system and NTSC system master clock +Ii raw and various control signals.

On the other hand, the M tJ S 1 image No. 1 outputted from the human power section (1) is processed by the two-dimensional interpolation filter (5) in 6.
2Ml1z is returned to the 1 area, and the time axis converter (6
), M LJ S l'=: From the method, N T S C
Aspect conversion and scanning line number conversion are performed. The frame memory processing unit (7) removes aliasing components generated by inter-frame offset sampling, and the motion detection unit (8) detects moving parts of the video and distinguishes between frame 11 and the current frame in the moving area. The mixing section (9) performs the sum calculation 211, and mixes the moving area and the stationary area. The Y separation/C decoding section (10) separates the luminance signal Y and the color signal +3-Y, ! '? -Y, time expansion is performed for color signal 1J, and the output section (II
) are the luminance signal Y and the color signal 13-Y.

II-Y D/Δ conversion and inverse matrix processing are performed to convert M to NTSC R, G, 13 signals.
IJSE Outputs the video signal.

[Problems to be Solved by the Invention] Conventional conversion devices cut off the top F and part of the left and right sides of the screen when converting high-definition video signals into 51ILJ format video signals, so high-definition broadcasting is not possible. There was a problem that the entire screen could not be seen.

Furthermore, the content of the video signal output from the conventional conversion device is limited to high-definition broadcasting video, and there is also the problem of lack of versatility in that standard broadcasting screens cannot be viewed at the same time.

This invention was made to solve the above-mentioned problems, and it is possible to display high-definition broadcast images on a standard television receiver, and also to display a reduced screen of the high-definition broadcast being received on the screen. An object of the present invention is to obtain a television receiving device capable of projecting images at a predetermined position.

The second purpose is to create a composite screen of a reduced screen of high-definition broadcasting and a screen of high-definition broadcasting converted to the standard format, or a composite screen of a reduced screen of high-definition broadcasting and a screen of broadcasting in the standard format. The first objective is to obtain a television receiving device that allows one to be selected.

[F-stage to solve the problem] The television receiving device according to the first invention has the following features: +'
-': A means for converting an R-quality horn-type video signal into a video signal compatible with the standard system (Li-), and a video signal representing a reduced screen compatible with the Toka system with a high-quality video signal as a standard. The present invention is characterized in that it is provided with a stage for converting the video signals and an r-stage for synthesizing these video signals into a video signal t representing a reduced screen at a predetermined position of the beef cattle screen.

Further, a second invention provides a method for transmitting a video signal j-, in which the reduced screen video signal is time-divided, as a high-definition video signal converted to conform to the standard r1 (J formula) in the first invention. It is characterized by having one stage for switching to either standard broadcasting video A or ``i''.

[Function] The L stage, which converts a high-quality video signal to conform to a standard format, performs one-time axis compensation, thinning of the number of scanning lines, and deletion of video signals to change the aspect ratio. and convert it to a standard video signal. The reduced screen signal generating means converts the high-quality video signal into a video signal compatible with the TV E format that is displayed in a predetermined size on the screen of a standard television receiver. The video signal synthesis means time-division multiplexes the high-quality video signal converted to conform to the standard format and the reduced-screen video signal, and
Composite video in which a reduced screen is displayed at a predetermined position on the live screen 1.
Since the first screen is created, it is possible to display a high-definition broadcast and a reduced version of the original full screen at the same time.

Moreover, the signal switching means in the second invention
．． No. 1 selects either the high-definition video signal converted to the standard format or the video signal of the standard format television broadcast as the frequently used video signal, so it can be You can choose to display either a reduced screen, standard broadcasting, or a high-definition reduced screen.

[Embodiment of the Invention] Hereinafter, an embodiment of the first invention will be described. In Figure 1, the same parts as in Figure 6 are given the same symbols, so
The explanation will be omitted. In the figure, (61) is a time axis correction unit that only converts the number of lines from the MUSE system to the NTSC system.

(13) is the frame memory for N'l'SC screen (hereinafter referred to as frame memory).

Frame memory (called 13N) separates Y and C:]
- Of the video signals of the MtJSE system converted to the NTSC system output from the code section (10).

Aspect ratio conversion r° that stores and reads out one screen worth of data that corresponds to the aspect ratio of the NTSC system.
It makes up a tier. (14) is buffer memo J, Y
The video data of the MUS I: format converted to the NTSC format and output from the separation/C decoding section (10) is stored one scanning line at a time. (15) is a frame memory for wide aspect screens (hereinafter referred to as ``frame l-memory + 15''), which compresses the data from the buffer memory (I4) in the time axis and sequentially reads out one scanning line at a time to make one screen. Memorize minutes. This buffer memory (I4) and frame memory (15) constitute means for converting the MUSE system visualization-3 converted into the NTSC system into a reduced screen video signal. (16) is these memories (1
31, (141 and (15)), a memory control unit that controls the aging and readout timing, (17) is a switch that selects either frame memory (13) or (I5), (1B) is a switch ( The switch control unit (17) performs switching control, and the switch (17) and the switch control unit (18) constitute one stage that time-monitors and synthesizes video signals.

Next, the operation will be explained. The M LJ S E system video signal input manually from the input terminal (1) is sent to the input terminal (1).
After the Y separation/C decoding unit (Al1) is converted
The process until it is converted into R, G, B data of NTSC system is the same as the conventional example shown in Fig. 6, but in the 1 time axis hli positive part (61), the number of lines is changed from MUSFζ system to NTSC system. There are four points at 5° that perform the conversion of The frame memory (13) receives LI from the memory control unit (16).
5, excluding the left and right sides of each running line, controlled by the I-incoming signal.
By storing image data corresponding to 4:3, data for one screen with the aspect ratio of the screen converted to 4:3 is stored.

The buffer memory (14) is connected to the - of the memory control unit (16).
1 input signal, the Y separation/C decoding section (1
Out of the 525 running lines output from 0), data is thinned out at a rate of one line for every K (K is a constant value determined by the size of the high-definition screen shown in Table 11 within the standard screen). is sent to the frame memory (15). Frame memory (15)
stores one screen worth of image data sent from the buffer memory (14), and is controlled by the read signal tJ of the memory control unit (16) to read out data from the frame memory (14) at a speed K (fl). Read i and reduce screen message 13
Convert to The switch (I7) is a switch control unit (1
8) is controlled by the switching signal of frame memory (
13) Switch between the video signal converted into the Nl'S (: method) read from the frame memory (I5) and the video A, 1Sj representing the reduced screen read from the frame memory (I5),
As shown in Figure 2, an M I whose vertical and horizontal sizes are reduced to (+/K) is placed at a predetermined position on the birth screen.
The output section (11) outputs the synthesized video data in such a way that the entire screen of the video devotion is displayed. It demodulates into R, G, l'3 signals and outputs them from terminal r-+121.

In addition, in this embodiment, it is necessary to insert an overlapping direction P I'' into the curve of the buffer memory (14) in order to eliminate aliasing interference that occurs when thinning out the number of running lines. is omitted to make it I/1iIiii.

FIG. 3 is a diagram showing an embodiment of the second invention, in which the embodiment of the first invention shown in FIG. The luminance 1.1 Y is separated from the output signal, and the color (3-; ny, R
-Y and the Y separation/C decoding section (22) converting this output video signal into N'rS which is output from the Y separation/C decoding section (!O).
The configuration is the same as that shown in FIG. 1, except that it includes a switch (19) for manually inputting a video signal of SIF and SIF to the frame memory (13).

In this example, the switch (19) is M tJ S E
When closed to the side, the ilSl amphibian shown in FIG. 2 is obtained, similar to the embodiment shown in FIG.
As shown in the figure, 1 of the NTSC video signal
On one screen, a reduced screen of the MIJS video transmission system is displayed.

In addition, 1. In the registered embodiment, the NTS C method is standard 1.
1 type, and the M IJ S r: method was explained as a high-quality type 11. The ΔM method may be used (and it goes without saying that a high-quality method may be a method other than the M IJ S l': force method).

[Effects of the Invention] As described above, according to the first invention, it is possible to display a reduced picture quotient of the product 1 system on a playback screen of a high-quality video signal converted to a standard format. This has the effect that the image portion that is cut off when converting to the standard format can be viewed on the +1 raw screen.

Further, according to the second invention, a reduced picture quotient of the entire high-definition video signal is displayed on a part of the main screen of the video signal of the N'VS C system, and a reduced picture quotient of the entire high-definition video signal is displayed. 1 of the high-definition video signal [#in the main screen, v
1. Since a reduced screen of the entire product-level video signal can be displayed, the versatility of the device 6 can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of an embodiment of the first invention;
The figure shows the +'Q raw white screen of this embodiment, and Figure 3 shows the second
4 is a diagram showing one type of tIi raw screen of this embodiment, FIG. 5 is a diagram for explaining the difference between the playback screen of the MUSE system and the NTSC system, FIG. 6 is a block circuit diagram of the conventional Must Me N' SC conversion device 4. (21, +211...human power section, (3)...synchronization section
(4)... Control No. 4A generation unit, (5)... Two-dimensional interpolation filter, (61)... Time axis conversion unit, (7)...
・Frame memory processing unit. +81...Motion detection section, (9)...Mixing section, (l
[ll, (22)...Y separation/C decoding section,
(11)...Output section, (13)...NTSC screen-frame memory 141...Buffer memory,
+151...Frame memory for wide aspect screen,
(16)...Memory control unit, (+71. +191.
...Switch, (+81...Switch control unit. In each figure, the same - sign indicates the same, or the phase 11 is smaller.

Claims (2)

[Claims] (1) means for converting a video signal of high-definition television broadcasting to be compatible with a standard television signal;
means for converting the high-definition video signal into a high-definition video signal compatible with a standard format television signal and representing a reduced screen; What is claimed is: 1. A television receiving device comprising means for time-division multiplexing a high-quality video signal representing the reduced screen and combining the reduced screen with a video signal displayed at a predetermined position on a playback screen. (2) The apparatus according to claim 1, further comprising means for switching a video signal in which a high-definition video signal representing a reduced screen is time-division multiplexed to a high-definition video signal converted into a standard format or a video signal of standard format television broadcasting. Television receiver.