JPH0385066A - Television receiver - Google Patents

Abstract

PURPOSE:To attain non-interlace without change of a screen brightness and a signal band by using a normal interlace signal and an interpolation signal generated from this signal so as to apply plural scanning lines simultaneously. CONSTITUTION:A normal interlace signal from a video output circuit 14 is fed to an electron gun 16 via a delay circuit 15. On the other hand, a still picture frame interpolation signal and a moving picture field interpolation signal are formed from the normal interlace signal by a field memory 18, a line memory 19, an adder circuit 20 and a coefficient device 22 respectively and fed to the electron gun 23 via a switch 21 controlled by a movement detection circuit 17 to scan two or plural scanning lines simultaneously. Through the constitution above, non-interlace processing is attained without changing screen brightness and signal band or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a television receiver that scans a plurality of scanning lines simultaneously.

[Prior Art] As a scanning method conventionally employed in television receivers, an interlaced scanning method is known. this is,
As shown in Fig. 3, in the first field, half of the total scanning lines (1, 2, 3, ...) are scanned, and in the next field, between the previous scanning lines (1', 2'3', . . . ), and 2
One screen is made up of fields.

Furthermore, a method has been proposed in which multiple electron guns simultaneously scan signals for multiple horizontal scanning periods to increase screen brightness.

Furthermore, in recent years, as a method to prevent flicker and increase resolution, as shown in Figure 4, interpolated scanning lines are created from the previous and subsequent lines or from the previous field, and the interpolated scanning lines are inserted between the scanning lines. (■,■,...), a method of creating one screen in the time of one field has been proposed. The configuration of a television receiver that implements such a method is described in the fifth section.
As shown in the figure.

In FIG. 5, 1 is an antenna and 2 is a tuner.

3 is a video intermediate frequency amplification circuit, which amplifies the video intermediate frequency signal. IO is a video amplification circuit that amplifies the video detection output. Reference numeral 11 denotes a color signal processing circuit that demodulates a color signal from the separated carrier color signal component. 13 is a matrix circuit that processes the demodulated color signal to generate R, G, and B signals. 14 is a video output circuit, R, G.

The B signal voltage is set to a level that can sufficiently drive the electron gun 27.

Reference numeral 17 denotes a motion detection circuit, which discriminates between a moving image and a still image based on the signal from the video output circuit 14. 1
8 is a field memory; 1 from the video output circuit 14;
It stores signals for one field. A line memory 19 stores one line of signals from the video output circuit 14.

Reference numeral 20 denotes an adder circuit which adds the signal of one line before from the line memory 19 and the signal of one current line. 22 is a coefficient unit that averages the signal from the adder 230. 21 is a switch which is switched based on the detection result of the motion detection circuit 17. 25 is a time compression circuit, and a video output circuit 147! +) He compresses the time axis of the signals. 26 is a time compression circuit,
The time axis of the interpolation signal input via the switch 21 is compressed to the moon.

28 is a changeover switch which alternately switches between the time compression circuits 25 and 26. The compressed regular video signal and the interpolated signal are alternately sent to the electron gun 271. m is supplied.

9 is a deflection coil, which is attached to the neck of the picture tube. 6
is a jungle circuit, 7 is a horizontal deflection circuit, and 8 is a vertical deflection circuit.

4 is an audio processing circuit that detects and amplifies the audio signal separated by the video intermediate frequency amplification circuit 3; 5 is a speaker.

[Problem to be solved by the invention] Conventional television receivers can double the scanning speed to
I made one screen consist of the time of the field, so
There was a problem that the brightness of the screen was H.

Furthermore, since the signal band is doubled, the elements that can be used are limited, and therefore the circuit configuration is not easy.

In particular, in the case of HD, currently, even with normal interlaced scanning, the tube surface brightness is low and the signal band is 20 Mz to 30 Mz, so it has been difficult to double the scanning speed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a television receiver that can perform non-interlacing without changing screen brightness or signal band.

[Means for Solving the Problems] In order to achieve such an object, the present invention provides interpolation signal generation means for generating an interpolation signal from a regular interlaced signal, an interpolation signal generated by the interpolation signal generation means, and an interpolation signal generated by the interpolation signal generation means. The present invention is characterized by comprising a scanning means for simultaneously scanning a plurality of scanning lines based on a regular interlaced signal.

[Function] In the present invention, an interpolation signal is generated from a regular interlace signal by an interpolation signal generation means, and a plurality of scanning lines are simultaneously scanned by a scanning means based on the interpolation signal generated by the interpolation signal generation means and the regular interlace signal. do.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the invention.

In the figure, 1~9.1G, 11.17~22.25~
Reference numeral 28 indicates the same part as in FIG. 15 is a delay circuit that delays the scanning line based on the signal from the video output circuit 14 by a predetermined time in order to synchronize with the interpolated scanning line; 16 is an electron gun to which the signal from the delay circuit 15 is applied; ing. 23 is an electron gun to which an interpolation signal from the field memory 18 or an intra-field interpolation signal from the coefficient multiplier 22 is applied via a switch 21.

Field memory 18, line memory 19, adder 20
, and the coefficient unit 22 constitute interpolation signal generation means.

Video output circuit 14, delay circuit 15, field memory 18, line memory 19. The adder 20, the jungle circuit 6, the horizontal deflection circuit 7, and the vertical deflection circuit 8 constitute a scanning means.

Next, the operation will be explained.

A video signal is extracted from a television signal obtained via an antenna 1 by a tuner 2 and a video intermediate frequency amplification circuit 3.

One of the video signals output from the video intermediate frequency amplification circuit 3 is deflected by a jungle circuit 6, a horizontal deflection circuit 7, and a vertical deflection circuit 8 using a deflection yoke 9. From the horizontal deflection circuit 7, horizontal and vertical blanking signals are supplied to the video output circuit 14.

The other video signal passes through a video amplification circuit 10 and a color signal processing circuit 11, is synthesized by a matrix circuit 13, and is input to a video output circuit 14.

The signal output from the video circuit 14 is transmitted to a delay circuit 15,
The signal is applied to motion detection circuit 17, field memory 18, line memory 19, and addition circuit 20.

Then, the signal output from the video circuit 14 to the delay circuit 15 is delayed by a predetermined time by the delay circuit 15, and then applied to the electron gun 16.

Interpolated scanning line signals are generated by signals output from the video circuit 14 to the motion detection circuit 17, the field memory 18, the line memory 19, and the addition circuit 20.

In the case of still images, this is called frame interpolation, and the signal on the same line in the previous field is used as the interpolation signal. On the other hand, in the case of moving images, this is called intra-field interpolation, and the interpolation signal is obtained by taking the average of the signals of the current line and the next line. This is because when frame interpolation is performed, there is no correlation between frames, so a time lag may occur between the interpolated image and the current image.

The signal of the previous field is output from the field memory 18, and is output to the switch 21 as a frame interpolation signal. Further, the line memory 19 outputs a signal from one line before, the signal from one line before and the current signal are added by an adder circuit 20, and the added signal is sent to a coefficient unit 22.
The averaged signal is output to the switch 21 as an intra-field interpolation signal.

Then, the switch 21 is switched based on the determination result by the motion detection circuit 17, and a frame interpolation signal or an intra-field sleeve opening signal is applied to the electron gun 23.

In this way, the two electron guns 16, 234: the regular signal and the interpolation signal are applied simultaneously, and as shown in FIG. 2, two scanning lines are scanned.

On the other hand, the audio is separated by the video intermediate frequency amplification circuit 3,
The signal is detected and amplified by the audio processing circuit 4 and output from the speaker 5.

Although we have explained an example of a television receiver using a cathode ray tube, the intended purpose can also be achieved with other television receivers such as a liquid crystal television or plasma display, or even with a monitor. .

[Effects of the Invention] As explained above, according to the present invention, since it is configured as described above, there is an effect that non-interlacing can be performed without changing the luminance of the tube surface and the signal band.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram illustrating scanning in one embodiment, FIG. 3 is an explanatory diagram illustrating an example of conventional scanning, and FIG. 4 is a diagram illustrating conventional scanning. An explanatory diagram illustrating another example of scanning. FIG. 5 is a block diagram showing a conventional television receiver. 2...Tuner, 3...Video intermediate frequency amplification circuit, 7...Horizontal deflection circuit, 8...Vertical deflection circuit, 9...Deflection yoke, lO...Video amplification circuit, 11-.・Color signal processing circuit, 13--Matrix circuit, 14--Video output circuit, 15--Delay circuit, 16.23--Electron gun, 17--Movement detection circuit, 18--Field Memory, 19--line memory, 20--adder, 21--changeover switch, 22--coefficient unit. U Riri

Claims (1)

[Scope of Claims] Interpolation signal generation means for generating an interpolation signal from a regular interlace signal; and scanning means for simultaneously scanning a plurality of scanning lines based on the interpolation signal generated by the interpolation signal generation means and the regular interlace signal. A television receiver comprising: