KR19990043030A - Television receiver with automatic tuning of the same program when switching channels - Google Patents

Abstract

The present invention relates to a television receiver configured to select and tune only a channel on which a program of a corresponding type is broadcasted when a user performs channel switching while a user selects a specific broadcast program type. Key input units 28 and 29 for designation, an OSD generator 34 for outputting OSD guide subtitles to designate the field of a program to be searched according to a predetermined control signal, and a subtitle output from the OSD generator 34. A mixer 35 for mixing the video signal and the video signal output from the image processor 21 and outputting it through a CRT screen, and a program classification data storage unit for storing program classification data specified through the key input units 28 and 29. (32), a KBPS code extracting unit (30) for extracting KBPS code information from a composite video signal, and decoding the KBPS information extracted by the KBPS code extracting unit (30); When the program search function is selected through the decoder 31 which detects the program classification data, and the key input units 28 and 29, the OSD generator 34 is driven to output a guide subtitle and the program. When the program classification information is set in the division data storage unit 32, a control unit for controlling the tuner 2 such that sequential channel switching is performed until the setting information matches the data detected by the decoder 31 ( 33) characterized in that configured to include.

Description

Television receiver with automatic tuning of the same program when switching channels

The present invention relates to a television receiver, and in particular, when a user performs channel switching in a state in which a user selects a specific broadcast program type, only the channel on which the program of the type is broadcast can be selected and tuned. A television receiver having an automatic tuning function.

With the recent rise of CATV, the number of broadcasting channels has increased significantly compared to the past, and it is expected that a number of professional channels will ride on various expectations of viewers in the future. There is a risk that even in the middle of the channel that he wants to select, it becomes difficult to distinguish.

1 is a view for explaining a tuning process of a conventional television receiver used in the prior art. In FIG. 1, reference numeral 1 denotes an antenna for receiving an airwave broadcasting signal, and 2 denotes an antenna 1. The tuner 2 tunes a signal of a broadcast channel selected by a user among the broadcast signals received by the user. The tuner 2 includes an RF amplifier 2a for amplifying the received RF signal and the RF amplifier 2a. The mixer 2b generates an intermediate frequency signal (IF signal) by mixing the signal outputted from the oscillation frequency from the local oscillation circuit 2d and the adder 2c to be described later.

Further, reference numeral 4 is an IF amplifier section for amplifying the IF signal output from the mixer 2b, and 5 is an image intermediate frequency signal PIF and an audio intermediate frequency from the IF signal output from the IF amplifier section 4; A P / S separation unit configured to separate a signal SIF, for example, a surface acoustic wave filter, etc., 6 is an audio detector for detecting an audio signal from the SIF signal, and 7 is an image detector for detecting an image signal from the PIF signal. .

Further, reference numeral 8 denotes a remote control unit for selecting a channel desired by the viewer or performing TV / AV mode switching, etc. 9 denotes a receiving unit for converting an infrared signal from the remote control unit 8 into an electric code signal, 10 Denotes a channel memory in which predetermined channel data is stored, and 11 denotes a microprocessor that controls the entire apparatus in accordance with a remote controller signal from the remote controller 8.

Reference numeral 12 denotes a PWM generator for generating a predetermined Pulse Width Modulation (PWM) signal according to the control signal from the microprocessor 11, and 13 denotes an output from the PWM generator 12. An integrated circuit for integrating a PWM signal to generate a predetermined level signal. When the viewer selects a predetermined channel using the remote controller 8, the microprocessor 11 receives channel data corresponding to the channel selected by the viewer. By reading from the channel memory 10 and controlling the PWM generator 12 based on this, a predetermined PWM signal is generated. The PWM signal is then transmitted to the channel selected by the viewer through the integrating circuit 13. It is output as a corresponding voltage control signal.

Subsequently, reference numeral 14 denotes an Automatic Fine Tunning (AFT) circuit provided for precise tuning operation, and 2c represents a voltage signal applied from the integrating circuit 13 and the AFT circuit 14. An adder for adding the output voltage signal, 2d is a local oscillation circuit, which generates a predetermined frequency signal according to the level of the voltage signal applied through the adder 2c and outputs it to the mixer 2b to execute a broadcast station. Done.

Meanwhile, in the local oscillation circuit 2d, the local oscillation frequency outputted is changed according to a change in ambient temperature or time elapses. When the local oscillation frequency is changed in this way, the intermediate frequency output from the mixer 2b is changed. As a result, stable image reproduction becomes impossible.

The AFT circuit 14 is provided to solve the above problem, which is the variation of the intermediate frequency ( Δ By outputting the voltage signal (± V) for f) to the adder 2c, the local oscillation frequency output from the local oscillation circuit 2d is stabilized.

In addition, in the TV receiver, the magnitude of the input signal received through the antenna 1 is changed due to the strength or fluctuation of the reception signal, and reference numeral 17 denotes an image signal detected by the image detector 7. AGC (Automatic Gain Control) for constantly controlling the output level of the image signal from the image detector 7 by controlling the amplification degree of the above-described RF amplifier 2a and IF amplifier 4 based on the level of? Control) circuit.

Although reference numeral 18 is not shown with respect to the audio signal output from the P / S separation unit 5, bass, treble, and volume (in accordance with a control signal from the microprocessor 11) are not shown. A voice processing unit for executing a voice processing such as a volume), and 19 denotes a voice amplifier for amplifying and outputting the voice signal processed by the voice processing unit 18 to the speaker 20.

Reference numeral 21 denotes a color, tint, brightness, etc. according to a control signal from the microprocessor 11 with respect to the image signal output from the P / S separation unit 5. Is an image processing unit which outputs R (Red), G (Green), and B (Blue) signals corresponding to the image signal, and 22 denotes a CRT 23 based on the RGB signal output from the image processing unit 21. CRT driving unit for driving the.

That is, in the device having the above-described configuration, when the user executes the broadcasting station through the remote control device 8, the microprocessor 11 drives the PWM generator 12 according to a user input value so that the local oscillation is performed. The oscillation frequency of the circuit 2c is controlled so that the video and audio signals of the channel selected by the user are output through the CRT 23 and the speaker 20 through respective processing.

On the other hand, when watching TV broadcasts, sometimes, the news or documentary program is interested in a program in a particular field, and sometimes a program in that field may be switched to find a channel. There was no efficient automatic channel selection function according to the user, and the user had to change the receiving channel randomly and find the desired program.

In recent years, G-coded reservation recording has various problems, and the broadcasting station transmits information about each broadcasting program to a specific frequency band of the broadcasting signal, and detects and restores it on the TV receiver. KBPS (Korea Broadcast Program Service) method has been developed to provide rough information on the end time and program contents, and it is in a state of practical use. When such KBPS information is used for broadcasting stations, You will find useful add-ons to search for programs in the field and tune into the channel.

The present invention has been made in view of the above circumstances, and when a user performs channel switching in a state in which a user selects a specific broadcast program type, the channel switching is performed so that only the channel on which the program of the type is broadcast can be selected and tuned. The aim is to provide a television receiver with automatic program selection.

1 is a diagram for explaining a channel switching operation in a general television receiver.

Figure 2 is a block diagram showing the main configuration of a television receiver equipped with automatic program tuning of the same personality program when switching channels according to an embodiment of the present invention.

******* Explanation of symbols on the main parts of the drawings *******

1 antenna 2 tuner (TUNER)

2a: RF amplifier 2b: mixer

2c: adder 2d: local oscillation circuit

4: IF amplification unit 5: P / S separation unit

6: voice detector 7: image detector

8,28: remote control device 9,29: receiver

10: channel memory 11,33: microprocessor

12: PWM generator 13: integrating circuit

14: AFT circuit 17: AGC circuit

18: voice processing unit 19: voice amplifier

20: speaker 21: image processing unit

22: CRT drive unit 23: CRT (Cathode-Ray Tube)

30: KBPS code extraction unit 31: Decoder

32: program classification data storage unit 34: OSD generation unit

35 mixer (MIXER)

In order to achieve the above object, a television receiver having an automatic personal tuning function of equality program in channel switching according to the present invention detects a tuner (2) and a broadcast signal tuned by the tuner (2) for a broadcast station and composite video signal. A television receiver comprising an image detector (7) for outputting a signal and an image processor (21) for processing an output signal of the image detector (7) and outputting a video signal for screen output. A key input unit 28, 29 for designating a program to be tuned; an OSD generator 34 for outputting an OSD guide subtitle to designate a field of a program to be searched according to a predetermined control signal; Mixer 35 for mixing the subtitle video signal outputted with the video signal outputted from the image processor 21 and outputting it through a CRT screen and storing the program classification data designated through the key input units 28 and 29. The program classification data storage unit 32, the KBPS code extraction unit 30 for extracting the KBPS code information ubiquitous in the contracted area of the broadcast signal from the composite video signal output from the image detector 7, this KBPS Decoder 31 which decodes the KBPS information extracted by the code extraction unit 30 to detect the classification data indicating the characteristics of the program, and when the program search function is selected through the key input units 28 and 29. When the OSD generation unit 34 drives the guide subtitles and the program classification information is set in the program classification data storage unit 32, the set information matches the data detected by the decoder 31. It characterized in that it comprises a control unit 33 for controlling the tuner 2 so that sequential channel switching is executed until.

That is, according to the present invention having the above-described configuration, it is possible to tune only a program of a desired field when switching channels based on KBPS information, thereby obtaining an effect of performing channel selection more quickly and easily.

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

FIG. 2 is a block diagram showing the main configuration of a television receiver equipped with the same personality program automatic tuning function when switching channels according to an embodiment of the present invention. FIG. 2 is a component that performs substantially the same function as the configuration shown in FIG. Are denoted by the same reference numerals and detailed description thereof will be omitted.

In FIG. 2, reference numeral 28 denotes a remote control device having a broadcasting station and a program designation key, and 29 denotes a receiving unit which receives an infrared signal transmitted from the remote control device 28, converts it into an electrical code signal, and outputs it. Is a microprocessor as a control unit which controls the overall operation of the apparatus on the basis of the code signal applied from the receiver 29 and executes the automatic tuning function of the program designated by the user.

Reference numeral 30 denotes a KBPS code extracting unit which extracts KBPS code information ubiquitous in the contracted area of the broadcast signal from the composite video signal output from the image detector 7, and 31 denotes the KBPS code extracting unit ( The decoder decodes the KBPS information extracted by 30) and outputs classification data indicating the characteristics of the program to the microprocessor 33.

Reference numeral 32 denotes a program classification data storage for storing program classification data designated by the user through the remote controller 28, and 34 denotes a user searching according to a control signal from the microprocessor 33. An OSD generator for outputting an OSD guide subtitle to designate a field of a desired program, 35 is a CRT driver by mixing the caption video signal output from the OSD generator 34 and the video signal output from the image processor 21; It is a mixer to output to (22).

Next, the operation of the device having the above configuration will be described.

If the user selects a predetermined function key (not shown) provided in the remote control device 28 to search only channels of a specific field during TV viewing, the microprocessor 33 drives and controls the OSD generator 34. By outputting a predetermined OSD guide subtitle on the screen to the user to select the program field to search.

On the other hand, when the user checks the guide caption output on the screen, and then selects the field of the program to search by operating the numeric keys of the remote control device 28, the microprocessor 33 is the program information selected by the user Is stored in the program classification data storage 32 to register the classification data of the program to be searched.

When the field setting of the search target program through the above process is completed, the microprocessor 33 sequentially switches the channel selection by controlling the tuner 2 through the PWM generator 12. The KBPS code extractor 30 extracts KBPS information of broadcast channels sequentially selected and outputs the extracted information to the decoder 31.

Meanwhile, the decoder 31 decodes the KBPS information applied from the KBPS code extractor 30 and outputs classification data indicating a program characteristic to the microprocessor 33. If the program classification data applied from the decoder 31 is matched with the data set in the program classification data storage unit 32, the program of the field designated by the user is automatically indexed by stopping the channel switching operation that was sequentially executed. I will do it.

On the other hand, the user can repeatedly search for the desired program by repeatedly executing the program search function through the operation of the channel up / down key provided in the remote control device 28.

That is, according to the embodiment, if a user performs channel switching while a user selects a specific broadcast program type, automatic tuning of the same personality program during channel switching is performed so that only the channel on which the program of the type is broadcast can be selected and tuned. It is possible to realize a television receiver equipped with a camera.

Meanwhile, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

As described above, according to the present invention, it is possible to tune only a program of a desired field during channel switching based on the KBPS information, thereby obtaining an effect of performing channel selection more quickly and easily.

Claims (1)

A video detector 7 for detecting a tuner 2 for broadcasting station and a broadcast signal tuned by the tuner 2 and outputting a composite video signal, and processing the output signal of the video detector 7 In the television receiver having an image processing unit 21 for outputting a video signal for screen output, A key input unit (28,29) for executing broadcast tuning and designating a program to be tuned; An OSD generator 34 for outputting an OSD guide caption to designate a field of a program to be searched according to a predetermined control signal; A mixer 35 for mixing the caption video signal output from the OSD generator 34 with the video signal output from the video processor 21 and outputting the mixed video signal through a CRT screen; Program classification data storage unit 32 for storing the program classification data specified by the key input unit 28, 29, KBPS code extraction unit 30 for extracting the KBPS code information ubiquitous in the contracted area of the broadcast signal from the composite video signal output from the image detector 7, A decoder 31 which decodes the KBPS information extracted by the KBPS code extraction section 30 and detects classification data indicating the nature of the program; and When the program search function is selected through the key input units 28 and 29, the OSD generating unit 34 is driven to output guide subtitles, and program classification information is set in the program classification data storage unit 32. And a control unit 33 for controlling the tuner 2 so that sequential channel switching is performed until the set information and the data detected by the decoder 31 coincide with each other. Personality program A television receiver with automatic tuning.