KR200155134Y1 - Automatic control apparatus using wide screen signal - Google Patents

Abstract

The present invention provides a chroma chip 400 that performs a function for reproducing various images such as an aspect ratio when using a video tape as a source of an image and a resolution thereof, and an aspect ratio when using a film as a source of an image. And a television broadcast receiver having an EEPROM 500 that stores reference data for reproducing various images, such as resolution, in particular, receiving a CVBS signal from among received signals and receiving a wide-screen signal. The chroma chip 400 and the EEPROM 500 according to the wide vision signal detector 600 for detecting and outputting the logic state of the fourth bit of the second group, and the output signal from the wide vision signal detector 600. By using a wide screen signal, characterized in that it comprises a microprocessor (300A) for generating a playback screen suitable for the source of the broadcast image If it relates to an automatic adjustment device.

Description

Screen automatic adjustment device using wide screen signal

The present invention relates to an apparatus for automatically adjusting a screen using a wide screen signal for changing a picture quality of a playback screen in a television receiver to an optimal state depending on a means used for screen reproduction of a television broadcast signal, that is, a film or a camera. will be.

A typical television receives and demodulates a broadcast signal transmitted from a broadcasting station and outputs the demodulated signal as a video signal and an audio signal through a CRT and a speaker. The approximate components of a typical television that performs these functions are the microcomputer that controls the overall operation of the system, the intermediate frequency processing module for processing video and audio intermediate frequencies (VIF, SIF), and the received video signal. A video demodulation module for restoring an image signal and a deflection module for deflection are separately configured into each module (meaning each chip) to receive and process broadcast signals.

A brief description of a part of a configuration for processing a video signal received in a conventional television system composed of each module as described above is shown in FIG. As shown therein, reference numeral 1 denotes an oscillator for generating an oscillation clock, and 2 denotes an oscillator clock that is obtained from the oscillator 1, and sets driving timing and output control and deflection of the OSD image according to the input synchronization signal. The microcomputer 2 performs a general control operation for outputting video and audio at the same time.

And 3 denotes an intermediate frequency processing module for processing audio and video intermediate frequencies, and 4 denotes between the intermediate frequency processing module 3 and the microcomputer 2 to provide a level matching circuit for level matching or automatic fine adjustment. Indicates. 5 denotes a crystal oscillator which oscillates to generate an arbitrary oscillation frequency, and 6 denotes a video demodulation module which demodulates a received video signal into an original video signal.

In addition, 7 denotes a synchronous separation circuit separating vertical and horizontal synchronization from the signal CVBS demodulated by the video demodulation module 6, and 8 denotes a caption signal or a buffer / filter circuit for buffering and filtering the CVBS. 9 shows a deflection module for vertical and horizontal deflection.

In the conventional TV configured as described above, when a viewer selects a TV / AV mode or an arbitrary channel by using a remote controller, each circuit starts operation under the control of the microcomputer, and the video and audio signals of the channel tuned. By processing the video, the image is displayed on the CRT, and the audio is sent to the speaker so that the viewer can watch the video and the audio.

When the user selects the caption mode, the microcomputer enables the caption operation, simultaneously extracts the caption signal (subtitle signal) from the caption broadcast signal obtained from the broadcasting station, and controls the on-screen display to perform caption display. If the TV on-screen is displayed by the remote controller or key input device while performing the caption display as described above, the caption-on-screen display is turned off, and the television on-screen display is operated to display the corresponding state. Again, the television on screen is turned off and the caption on screen is enabled to control the caption display again.

However, in television broadcasting stations, film or video tape is used as a source of a television video signal. When using film or video tape as a source, the aspect ratio of the playback screen and the color of the image are different. Therefore, the television receiver should correct this.

Accordingly, a technique for correcting a playback screen in a receiver according to a source of television broadcasting has been proposed, which is briefly shown in FIG.

FIG. 2 is a simplified configuration diagram of a correction apparatus in a receiver according to a source of a conventional broadcast image, which performs functions for reproducing various images such as aspect ratio and corresponding resolution when a video tape is used as a source of an image. The chroma chip 400, the EEPROM 500 which stores reference data for reproducing various images such as the aspect ratio and the resolution when the film is used as the image source, and the state of the screen reproduced by the user After checking the remote control 100 for commanding the degree to be adjusted according to the state of the playback screen, and a receiving unit for receiving a command in the form of a wireless signal generated by the remote control 100 and converts it into the form of an electrical signal ( 200) and the microcomputer controlling the chroma chip 400 and the EEPROM 500 according to the signal output from the receiver to generate a playback screen suitable for the source of the broadcast video. It is composed of a processor (300).

In the above configuration, the chroma chip 400 and the EEPROM 500 are configured inside the video demodulation module 6 in FIG.

Looking at the large operation of the correction apparatus in the receiver according to the source of the conventional broadcast image configured as described above, first, when the video signal is received, the chroma chip 400 unconditionally operates when the video tape is used as the image source A corresponding playback screen is formed. The reason is that most of the current broadcast video is captured by the camera and stored on video tape.

In this case, if a broadcast using a film as an image source is received, a slight distortion occurs on the screen, and the color of the image is reproduced in an inconsistent state, so the user uses the remote controller 100 to change the playback mode of the screen. You can choose to switch or enter a custom mode to adjust manually. Accordingly, the microprocessor 300 controls the operation of the chroma chip 400 based on the data stored in the EEPROM 500 to maintain the optimal state of the playback screen.

However, the conventional method as described above is a situation that has been pointed out as a significant problem, as the user is inconvenient to adjust the screen or check the display state of the screen.

An object of the present invention for solving the above problems is to widen the image quality of the playback screen on the television receiver to the optimum state depending on the means used for screen reproduction of the television broadcast signal, that is, film or camera. The present invention provides a device for automatically adjusting a screen using a screen signal.

1 is a partial schematic configuration diagram of a conventional television system

2 is a simplified configuration diagram of a correction apparatus in a receiver according to a source of a conventional broadcast video;

Figure 3 is a block diagram of a screen automatic adjustment device using a wide screen signal according to the present invention

4 is a flowchart illustrating operations according to the present invention.

A feature of the present invention for achieving the above object is the use of a chroma chip and a film that performs functions for reproducing various images such as the aspect ratio and the resulting resolution when a video tape is used as a source of an image. In a television broadcast receiver having a reference data for reproducing various images such as an aspect ratio and a resolution thereof according to the present invention, the fourth group of the second group of wide screen signals receives the CVBS signal among the received signals. A wide vision signal detector for detecting and outputting a logic state of a bit, and a microprocessor for controlling the chroma chip and the EEPROM according to the output signal output from the wide vision signal detector to generate a playback screen suitable for a source of a broadcast video. There is.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention in detail as follows.

First, describing a technical background to be used in the present invention, when a wide vision having an aspect ratio of 16: 9 is generated in a broadcast signal, a wide screen signal is used so that the aspect ratio can be adjusted by the receiver. Is transmitted along with the broadcast signal, and the wide screen signal is uniformly added to all broadcasts with or without wide vision. In addition, the wide screen signal is formed of several digital signal groups, and most bit positions have a specific value. In this case, since the fourth bit of the second group of the wide-screen signal is a unique digit representing the film mode, the fourth bit is recognized and automatically processed.

3 is a block diagram of a device for automatically adjusting a screen using a wide screen signal according to the present invention, which performs functions for reproducing various images such as aspect ratio and resolution according to the case where a video tape is used as an image source. A chroma chip 400, an EEPROM 500 that stores reference data for reproducing various images such as an aspect ratio when using a film as an image source and a resolution thereof, and a CVBS signal among the received signals are received. According to the wide vision signal detector 600 for detecting and outputting a logic state of the fourth bit of the second group of the wide-screen signal, and the output signal output from the wide vision signal detector 600. The microprocessor 300A controls the chroma chip 400 and the EEPROM 500 to generate a playback screen suitable for the source of the broadcast video.

Referring to Figure 4 attached to the preferred operation example of the automatic screen adjustment device using a wide screen signal according to the present invention constituted by the wax tie as follows.

In step S101, the microprocessor 300A determines whether the WSS signal is detected through the wide-vision vision signal detection unit 600, and if not detected, proceeds to step S104 to proceed to the normal operation mode.

If the process proceeds to step S102, it is determined whether the logic value of the bit in which the fourth bit in the second group of the wide-screen signal is in the unique position indicating the film mode is high. In this case, if it is determined that the film mode is not, the process proceeds to step S104. If it is determined that the film mode is determined, the process proceeds to step S103. The user-defined value is redefined according to the movie mode, and the state of the screen is reconfigured accordingly.

By providing a screen automatic adjustment device using a wide screen signal according to the present invention that operates as described above, it is possible to automatically change the image quality of the playback screen on the television receiver to the optimal state depending on whether it is a film or a camera.

Claims (1)

A chroma chip 400 which performs functions for reproducing various images such as the aspect ratio when the video tape is used as the source of the image and the resolution thereof, and the aspect ratio when the film is used as the source of the image, and accordingly In a television broadcast receiver having an EEPROM 500 that stores reference data for reproducing various images such as resolution, A wide vision signal detector 600 which receives a CVBS signal among the received signals and detects and outputs a logic state of a fourth bit of a second group of a wide-screen signal; And It includes a microprocessor (300A) for controlling the chroma chip 400 and the EEPROM (500) in accordance with the output signal output from the wide vision signal detector 600 to generate a playback screen suitable for the source of the broadcast image Automatic screen adjustment using a wide screen signal characterized by.