KR0131525B1 - Analog control apparatus of television - Google Patents

Abstract

An analog control apparatus of a television set is disclosed. The analog control apparatus comprises a voice signal processing unit(21) for controlling the state of a voice output of the television set; an image signal processing unit(23) for controlling the state of a video output of the television set; a storing unit(26) for storing an analog control data for each channel of the television set; a channel recognition unit(27) for recognizing a present watching channel and generating a recognizing signal; and a microprocessor(11) for reading an analog control data from the storing unit(26) according to the recognizing signal and controlling the voice signal processing unit(21) and the image signal processing unit(23) based on the read analog control data.

Description

TV's Analog Control Unit

1 is a block diagram showing a conventional television receiver.

2 is a block diagram showing an analog control apparatus for a television according to the present invention.

* Explanation of symbols for main parts of the drawings

1 antenna 2 RF amplifier

3,24 mixer 4 IF amplifier section

5: P / S separation unit 6: voice detector

7: image detector 8: remote control device

9: receiver 10: channel memory

11: microprocessor 12: OSD generator

13: PWM generator 14: Integrating circuit

15: AFT circuit 16: adder

17: local oscillation circuit 18: AGC circuit

19: external AV device 20: switching unit

21: voice processing unit 22: voice amplification unit

23: image processor 25: CRT driver

26: setting state storage unit 27: channel recognition unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to television receivers, and more particularly, to an analog control apparatus for televisions having improved convenience in analog control setting. Currently, televisions that have been developed and used are equipped with various convenience devices in addition to a simple broadcast reception function as a result of technology development. Recently, as video and audio playback devices such as VCR (Video Cassette Recorder), laser disk player, and compact disk graphics player have been developed and disseminated, it is possible to watch video and audio signals played back from these playback devices on TV. TV is gradually being developed toward the purpose of utilizing TV as a composite image output device. 1 is a block diagram schematically showing the configuration of a television set to perform this function. In the drawing, reference numeral 1 denotes an antenna, 2 denotes an RF amplifying unit for amplifying a radio frequency (RF) signal received through the antenna 1, and 3 denotes an RF signal from the RF amplifying unit 2 and later. A mixer for generating an intermediate frequency signal (IF signal) by mixing the oscillation frequency from the local oscillation circuit 17 to be described. Reference numeral 4 denotes an IF amplifier for amplifying the IF signal output from the mixer 3, and 5 denotes an image intermediate frequency signal PIF and an audio intermediate frequency from the IF signal output from the IF amplifier 4; A P / S separation unit for separating 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 a video signal from the PIF signal. Further, reference numeral 8 is a remote control device for selecting a channel desired by the viewer or performing TV / AV mode switching, etc. 9 is a receiving unit for converting an infrared signal from the remote control device 8 into an electric code signal; 10 denotes a channel memory in which predetermined channel data is stored, and 11 denotes a microprocessor which controls the entire apparatus according to the remote controller signal from the remote controller 8. In addition, reference numeral 12 denotes an OSD generator for guiding operation signal input of a television. Reference numeral 13 denotes a PWM generator for generating a predetermined Pulse Width Modulation (PWM) signal in accordance with a control signal from the microprocessor 11, and 14 denotes a PWM generator. An integrating circuit for generating a predetermined level signal by integrating the output PWM signal. When the viewer selects a predetermined channel using the remote controller 8, the microprocessor 11 converts the channel data corresponding to the channel selected by the viewer. Reads from the channel memory 10 and then controls the PWM generator 13 to generate a predetermined PWM signal, wherein the PWM signal corresponds to the channel selected by the viewer through the integrating circuit 14. It is output as a voltage control signal. Subsequently, reference numeral 16 denotes an adder for adding a voltage signal applied from the integrating circuit 14 and a voltage signal applied from an AFT (Automatic Fine Tunning) circuit 15 to be described later, and 17 denotes a local oscillating circuit. This generates a predetermined frequency signal in accordance with the level of the voltage signal applied through the adder 16 and outputs it to the mixer 3 to execute the broadcast station. On the other hand, the AFT circuit 15 is referred to as an automatic fine circuit, which is provided for precise tuning operation. In other words, the local oscillation circuit 17 is a local oscillation frequency that is output in accordance with the change in the ambient temperature or time. When the local oscillation frequency is changed in this manner, the intermediate frequency output from the mixer 3 is varied, so that stable image reproduction is impossible.

The AFT circuit 15 is provided to solve the above problems, which is output from the local oscillation circuit 17 by outputting a voltage signal (± ΔV) with respect to the fluctuation range Δf of the intermediate frequency to the adder 16. It is to stabilize the local oscillation frequency.

In addition, in the television, 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 18 denotes the image signal detected by the image detection unit 7. AGC (Automatic Gain Control) for controlling the output level of the image signal from the image detector 7 by controlling the amplification degree of the above-described RF amplifier 2 and IF amplifier 4 based on the level. Control) circuit.

On the other hand, reference numeral 19 denotes an external AV device such as a VCR or a laser disc player, and 20 denotes the above-described voice detector 6 and image detector 7 according to the switching signal from the microprocessor 11. Is a switching unit for selectively outputting audio and video signals and audio and video signals from the external AV device 19. Although reference numeral 21 is not shown for the audio signal output from the switching unit 20, the base, treble, and volume according to the control signal from the microprocessor 11 is shown. And a voice amplifier for amplifying and outputting the voice signal processed by the voice processor 21 to the speaker. Although reference numeral 23 is not shown with respect to the image signal output from the switching unit 20, the color, tint, and brightness according to a control signal from the microprocessor 11 is used. And an R (Red), G (Green) and B (Blue) signal corresponding to the video signal, and 24 denotes an RGB signal output from the image processor 23 and the above-described OSD generation. A mixer for mixing and outputting the RGB and OSD blanking signal (Y ') output from the unit 12, 25 is a CRT driving unit for driving the CRT based on the RGB signal output from the mixer 24. Analog control is the adjustment of the screen brightness, contrast, sharpness, etc., and the audio output of the volume, base, and treble. Although the analog control is not shown in FIG. 1, a PWM generator and an integrated circuit are installed in front of the audio processor 21 and the image processor 23, and the microprocessor 11 performs the PWM generation of the PWM. Signal generation is controlled and executed. The PWM signal of the PWM generating unit is converted into an analog signal by the integrating circuit, and the above-described screen state and audio output are adjusted according to the magnitude of the analog signal. That is, the analog control means that the screen state and the like described above are adjusted based on the analog value. Looking at the changes in the current broadcasting environment, not only new broadcasting channels are created but also the distribution of cable television is being activated. This means that the number of channels that the viewer can select increases. As channels diversify, each channel becomes more professional, especially in the case of cable television. On the other hand, when the channel is diversified and specialized as described above, for example, when watching a movie-only channel, the screen state and the audio output such as screen brightness and contrast are adjusted according to the characteristics of the movie. In addition, in the case of the music channel, analog control of the audio output is performed to increase the listening effect of the sound. That is, as described above, the viewer changes the setting of the analog control according to the characteristics of the channel. However, as the number of channels increases, the frequency of change of the analog control becomes higher. Therefore, the viewer has to adjust the analog control according to the program characteristics of the channel whenever the viewing channel is changed. Moreover, since the broadcast transmission and reception states are different according to the channel, as the TV is multi-channel, the inconvenience of analog control increases. The present invention has been invented to solve the above-described problem, and an object thereof is to provide an analog control apparatus for a television that can set an analog control state according to the characteristics of the channel for each channel. An analog control apparatus for a television according to the present invention for achieving the above object comprises a sound processor for adjusting the audio output state of the television, an image processor for adjusting the video output state of the television, and analog control data for each channel of the television. A stored state storage unit, a channel recognition unit that recognizes a current viewing channel and generates a predetermined recognition signal, and extracts analog control data for the channel from the set state storage unit according to a recognition signal of the channel recognition unit. And, based on this, it characterized in that it comprises a microprocessor for controlling the sound processor and the image processor. According to the present invention having the above configuration, not only can the analog control data be set for each channel, but also if the channel is newly changed while watching TV, the analog control state of the television is automatically adjusted according to the analog control data set for the corresponding channel. do. EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described, referring drawings. 2 is a diagram illustrating an analog control apparatus for a television according to an embodiment of the present invention, in which the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 2, reference numeral 26 denotes a setting state storage unit, which stores analog display data such as screen brightness, contrast, and sharpness, and audio output states such as voice level, bass, and treble for each channel. have. In addition, reference numeral 27 denotes a channel recognition unit, which recognizes the current viewing channel of the television based on the oscillation frequency of the local oscillation circuit 17. FIG. That is, in the above-described configuration, the viewer stores the data value for the analog control for each channel in consideration of the characteristics of each channel and its own preference in the setting state storage unit 26 using the remote controller device 8 or the like. . Next, the microprocessor 11 sets an analog control state for a channel initially selected based on the analog control data stored in the setting state storage unit 26 at power-on. Next, when the viewing channel is changed by the user, the channel recognition unit 27 recognizes the changed channel and applies the recognition signal to the microprocessor 11 accordingly. The microprocessor 11 extracts analog control data for the corresponding channel from the setting state storage unit 26 based on the channel recognition signal from the channel recognition unit 27, and based on this, the voice processor 21 ) And the image processor 23 to set the screen state and the audio output state according to the analog control data preset by the viewer. In addition, this invention is not limited to the said Example, A deformation | transformation is possible in the range which does not deviate from the technical summary of this invention. As described above, according to the present invention, when changing the channel, the viewer does not need to change the analog control state. In other words, the tuned channel is automatically recognized by the channel recognition unit, while the TV's analog control device is automatically adjusted according to the analog control data preset for the corresponding channel. do.

Claims (1)

An audio processing unit 21 for adjusting the audio output state of the television, an image processing unit 23 for storing the video output state of the television, a setting state storage unit 26 storing analog control data for each channel of the television, present A channel recognition unit 27 which recognizes a viewing channel and generates a predetermined recognition signal, and extracts analog control data for the corresponding channel from the set state storage unit 26 according to the recognition signal of the channel recognition unit 27. And a microprocessor (11) for controlling the sound processor (21) and the image processor (23) on the basis of this.