KR19990005411A - Broadcast System Adaptive Television Receiver - Google Patents

Abstract

According to the present invention, a broadcast system adaptive type is provided to determine a broadcast method based on a received broadcast signal and automatically adjust the output screen width and the horizontal position of the video signal to correspond to the broadcast method. A television receiver, comprising: an IF processor for converting a received broadcast signal into an intermediate frequency signal; and a vertical synchronous detector for detecting a vertical synchronization signal based on a signal output from the IF processor and outputting a resultant signal. A television receiver comprising a control unit for controlling the first half, and an image processing unit for performing image signal processing corresponding to an arbitrary broadcasting method under the control of the control unit; A switch for selectively combining the output signal with respect to the input signal according to the control signal of the controller), a first horizontal circuit for adjusting the horizontal scanning distance to correspond to the PAL-N broadcasting method, and PAL-M or NTSC broadcasting And a second horizontal circuit for adjusting the horizontal scanning distance so as to correspond to the method, wherein the control unit controls switching of the switch based on a predetermined detection result signal output from the vertical synchronous detection unit.

Description

Broadcast System Adaptive Television Receiver

The present invention relates to a television receiver, in particular, it is possible to provide a complete image output screen by automatically determining the output screen width and horizontal position of the video signal to correspond to the corresponding broadcast method by determining the broadcast method based on the received broadcast signal. The present invention relates to a broadcast system adaptive television receiver.

Currently, the television broadcasting system adopts the NTSC (National Television System Committee) method used in Korea, the United States, and Japan, and transmits one of two chroma signals by reversing the phase for each scanning line, and employs it in Germany, Western Europe, and China. PAL (Phase Alteration by Line) method and SECAM (SEquential Colors AMemoire) method proposed by France and adopted by French Eastern Europe and the Commonwealth of Independent States are recognized as standard methods. PAL-M and Argentina's PAL-N.

As described above, since the broadcasting methods of the countries are different, for example, images taken using a camcorder purchased in Europe cannot be reproduced through a Korean television receiver. That is, even if a video imager and a video cassette recorder (VCR) sold in Europe are provided, they cannot be seen in Korea. In addition, using a television receiver sold in our country will not be able to receive broadcast signals from Brazil or Argentina.

Thus, in order to solve this problem, a television receiver has been put to practical use in which a television receiver can discriminate a plurality of broadcast methods and process video signals corresponding to any broadcast method. It is a block diagram which shows the structure of a receiver.

In the drawing, reference numeral 1 denotes an antenna, and 2 denotes a tuner which tunes a broadcast signal received through the antenna 1 and outputs a corresponding intermediate frequency signal IF according to a control signal of a microprocessor 9 to be described later. 3 is an IF amplifying unit for amplifying the intermediate frequency signal output from this tuner 2, and 4 is an image intermediate frequency signal PIF and an audio intermediate frequency signal (from the intermediate frequency signal output from the IF amplifying unit 3). For example, a P / S separation unit composed of a surface acoustic wave filter or the like for separating the SIF, and 5 and 6 are the audio intermediate frequency signal (SIF) and the image intermediate frequency signal (PIF) which are separated and output from the P / S separation unit (4). Are audio and video detectors for detecting audio and video signals, respectively.

Further, reference numeral 7 is a remote control device for remotely controlling the television receiver, 8 is a receiving unit for receiving a remote control signal transmitted from the remote control device 7, converting it into a predetermined electrical code signal, and outputting the same. 9 is a microprocessor serving as a control unit for controlling the entire apparatus, 10 is a program storage unit for storing an operation program of the microprocessor 9, and 11 is a channel memory for storing predetermined channel data.

Further, reference numeral 12 is not shown for the voice signal output from the voice detector 5, but according to the control signal from the microprocessor 9 Bass, Treble, Volume, etc. 13 is a voice amplifier which amplifies the voice signal processed by the voice processor 12 and outputs it to the speaker.

Further, reference numeral 14 denotes an image such as color, tint, brightness, etc. according to a control signal from the microprocessor 8 with respect to an image signal output from the image detector 6. An image processor which executes processing to generate and output corresponding R (Red), G (Green), B (Blue), and luminance (-Y) signals, and 15 denotes R, G, The CRT driver drives the CRT based on the B and luminance (-Y) signals.

In this case, the image processor 14 performs an RGB signal by performing signal processing corresponding to an image signal transmitted in an arbitrary NTSC, PAL-N, and PAL-M modes according to the control signal of the microprocessor 9. And outputs a luminance signal, and the CRT driver 15 drives the CRT based on the RGB signal and the luminance signal signal-processed and output from the image processor 14.

On the other hand, reference numeral 16 is a vertical synchronization detector for detecting a vertical synchronization signal in the 50 or 60hz band from the intermediate frequency signal output from the IF amplifier 3 to output a predetermined detection result signal, and 17 is the image detection. It is a color part carrier detection unit which detects a color part carrier signal from the composite video signal output from the part 6 and outputs a predetermined detection result signal.

That is, in the television receiver having the above-described configuration, the microprocessor 9 determines that the vertical synchronization signal detection result signal of, for example, 50 Hz band is a PAL-N broadcast signal when the vertical synchronization signal detection result signal is input. The image processing unit 14 is controlled, and when the vertical synchronous detection unit 16 receives, for example, a vertical synchronization signal detection result signal of 60 Hz band, it is determined to be a PAL-M or NTSC broadcast signal, and then the color carrier is The image processor 14 is controlled based on a predetermined detection result signal input from the detector 17. That is, when the detection result signal for the 3.579545 MHz band or the 3.575611 MHz band signal is input from the color carrier detector 17, the image processor 14 controls the image processor 14 based on the detection result signal.

By the way, as described above, it is preferable to configure the signal processing for a plurality of broadcasting schemes in one television receiver, but due to the difference in the horizontal scanning frequency signal, the image output screen output to the CRT is originally the size of the CRT. There is a problem that does not fit. That is, since it is virtually impossible to configure the size of the CRT to vary with each broadcasting method, the horizontal size of the output screen is inevitably caused by applying a plurality of systems having different horizontal sizes of the output video signal to the horizontal size of the fixed CRT. There is a problem that the size of the and CRT do not match.

Accordingly, the present invention was created in view of the above circumstances, and by determining the broadcast method based on the received broadcast signal, and automatically adjusting the output screen width and the horizontal position of the video signal to correspond to the broadcast method. Its purpose is to provide a broadcast system adaptive television receiver that can provide a complete image output screen.

1 is a block diagram showing the configuration of a conventional general television receiver.

2 is a block diagram showing a configuration of a broadcast system adaptive television receiver according to an embodiment of the present invention;

Brief description of the main parts of the drawing

1: antenna 2: tuner

3: IF amplification unit 4: P / S separation unit

5: voice detector 6: image detector

7: Remote controller 8: Receiver

9: microprocessor 10: program storage unit

11: channel memory 12: voice processing unit

13: audio amplifier 14: image processor

15: CRT drive unit 16: vertical synchronous detection unit

17: color carrier detection unit 102: switch

103: first horizontal circuit 104: second horizontal circuit

The broadcast system adaptive television receiver according to the present invention for realizing the above object comprises: an IF processor for converting a received broadcast signal into an intermediate frequency signal, and detecting a vertical synchronization signal based on a signal output from the IF processor. A television receiver having a vertical synchronous detection unit which outputs a result signal, a control unit which controls the whole apparatus, and an image processing unit which performs image signal processing corresponding to an arbitrary broadcasting method according to the control of the control unit; A switch for selectively combining an output signal with respect to an input signal according to a control signal of the controller, a first horizontal circuit for adjusting a horizontal scanning distance to correspond to a PAL-N broadcasting scheme, and a PAL-M or NTSC broadcasting scheme And a second horizontal circuit for adjusting the horizontal scanning distance to correspond to the control unit, wherein the control unit controls switching of the switch based on a predetermined detection result signal output from the vertical synchronous detection unit.

Therefore, according to the above, it is possible to variably adjust the screen width of the output screen output to the CRT in accordance with a plurality of broadcasting system, the viewer can watch the plain screen regardless of the broadcasting system.

Next, an embodiment according to the present invention will be described with reference to the accompanying drawings.

2 is a block diagram showing a configuration of a broadcast system adaptive television receiver according to an embodiment of the present invention. In the figure, parts which perform the same functions as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the drawing, reference numeral 100 denotes a microprocessor for controlling the entire apparatus, 101 denotes a program storage unit for storing an operation program of the microprocessor 100, 102 denotes an image processor (in accordance with a control signal of the microprocessor 100). It is a switch to selectively output the signal output from 14).

Reference numerals 103 and 104 generate horizontal deflection driving pulses based on the signal input from the image processor 14 through the switch 102 to generate horizontal deflection coils (not shown) provided in the CRT. As the first and second horizontal circuits to drive, the first horizontal circuit 103 is the width of the output screen in the PAL-N broadcasting system, and the second horizontal circuit 104 is the output screen in the PAL-M or NTSC system. This is to correct the width of.

That is, in the present invention having the above-described configuration, the microprocessor 100 is based on a predetermined detection result signal output from the vertical synchronous detection unit 16 and the color carrier detection unit 17, the image processing unit 14 In addition to the control, the switch 102 is controlled to switch so that the signal output from the image processor 14 is selectively output to the horizontal circuits (103, 104) of the rear stage.

Next, the embodiment according to the present invention will be described in more detail.

First, when the power is turned on by the user, the microprocessor 100 tunes and controls the tuner 2 based on predetermined channel data. Then, the broadcast signal received and tuned through the antenna 1 is converted into an intermediate frequency signal and then processed into video and audio signals, respectively, and output to the speaker and the CRT.

Meanwhile, the vertical synchronous detection unit 16 detects the vertical synchronous signal based on the intermediate frequency signal output from the IF amplifier 3 and outputs a corresponding predetermined detection result signal to the microprocessor 100. . At this time, when a predetermined detection result signal for the 50Hz band vertical synchronization signal is input, the microprocessor 100 controls the image processor 14 to perform the corresponding image signal processing and the switch 102. ) Is controlled to switch so that the signal output from the image processor 14 is input to the first horizontal circuit 103.

Then, the first horizontal circuit 103 controls the horizontal scanning distance output to the CRT by driving the horizontal deflection coil based on the signal input from the image processor 14 through the switch 102.

On the other hand, when the predetermined detection result signal output from the vertical synchronization detection unit 16 is a detection result signal for the vertical synchronization signal of the 60hz band, the microprocessor 100 controls the image processing unit 14 to correspond to the corresponding image signal. In addition to controlling to perform processing, switching control of the switch 102 is performed to control switching so that a signal output from the image processor 14 is input to the second horizontal circuit 104.

Then, the second horizontal circuit 104 controls the horizontal scanning distance output to the CRT by driving the horizontal deflection coil based on the signal input from the image processor 14 through the switch 102.

That is, according to the above, the screen width of the output screen output to the CRT can be variably adjusted in accordance with a plurality of broadcasting system so that the viewer can watch the plain screen regardless of the broadcasting system.

In addition, this invention is not limited to the said Example, It can variously deform and implement within the range which does not deviate from the technical summary of this invention.

As described above, according to the present invention, not only the broadcasting method is determined based on the received broadcasting signal, but also the output screen width and the horizontal position of the video signal are automatically adjusted to correspond to the broadcasting method. By adapting the screen width of the output screen output to the CRT accordingly, a broadcast system adaptive television receiver can be realized that enables viewers to watch a plain screen regardless of the broadcasting method.

Claims (1)

An IF processor 3 for converting the received broadcast signal into an intermediate frequency signal, and a vertical synchronization detector 16 for detecting a vertical synchronization signal based on the signal output from the IF processor 3 and outputting the resultant signal; In the television receiver having a control unit 100 for controlling the overall device, and an image processing unit 14 for performing a video signal processing corresponding to any broadcast method according to the control of the control unit 100; A switch 102 for selectively combining an output signal with respect to an input signal according to a control signal of the controller 100, and a first horizontal circuit 103 for adjusting a horizontal scanning distance to correspond to a PAL-N broadcasting method; And a second horizontal circuit 104 for adjusting a horizontal scanning distance so as to correspond to a PAL-M or NTSC broadcasting system, wherein the control unit 100 outputs a predetermined output from the vertical synchronous detection unit 16. And a switching system for controlling said switch (102) based on a detection result signal.