KR0158324B1 - Automatic channel setting-up apparatus and method by using kbps code - Google Patents

Abstract

According to the present invention, when the ACMS (Auto Channel Memory System) function is executed, only the strong signal channel is selectively stored for the same channel, so that the same channel can be prevented from being duplicated due to the proximity channel signal or the interference channel signal. And a method comprising: a tuner (TUNER) for a broadcast station and an AGC circuit for constantly controlling the output level of the video signal by controlling the amplification degree inside the tuner based on the output level of the video signal, and a channel automatic setting function. A television receiver having a retrieval channel storage means for storing channel data set by the apparatus; KBPS code detection means for separating and detecting the KBPS code signal from the broadcast signal, synchronous signal detection means for detecting a synchronous signal for broadcast signal channel broadcasting, and when the signal signal channel is selected by the synchronous signal detection means, channel data and AGC level storage means for storing the corresponding code signal detected by the KBPS code detection means and the AGC level of the channel in correspondence with each other, and comparing and storing the data stored in the AGC level storage means, the AGC level is increased for each channel. A channel automatic setting apparatus comprising a control means for selecting a minimum broadcasting channel and controlling to selectively store the selected broadcasting channel in the search channel storage means; A code data detection step of detecting code data of a corresponding channel if a synchronization signal exists in a channel currently tuned and input; A pre-signal channel data storage step of storing channel data of the detected channel, AGC level, and code data in correspondence with each other; According to the AGC level, the channel tuning data storing step of selecting the channel data having the lowest AGC level for each channel of the stored data as the basis data of the channel selection, the channel automatic setting method characterized in that it comprises. .

Description

Channel automatic setting device and method using KBPS code

1 is a diagram showing the internal configuration of a general TV receiver having an automatic channel search function.

2 is a block diagram showing an internal configuration of an automatic channel setting apparatus using a KBPS code according to an embodiment of the present invention.

3 is a flow chart for explaining the operation of the device of the configuration of FIG.

* Explanation of symbols for main parts of the drawings

1: broadcast station 1: antenna

2: RF amplifier 3: Mixer

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

6: voice detector 7: image detector

8: remote control unit 9: receiver

10: channel memory 11,111: microprocessor

12: PWM generator 13: integral circuit

14 AFT circuit 15 adder

16: local oscillation circuit 17: AGC circuit

18: voice processing unit 19: voice amplifier

20: speaker 21: image processing unit

22: CRT drive unit 23: CRT

24: sync signal detector 25, 125: search channel storage unit

124: A / D converter 126: KBPS decoder unit

125: AGC level storage unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel automatic setting apparatus and a method thereof for a TV receiver, in particular, when executing an Auto Channel Memory System (ACMS) function, a KBPS code is detected from a broadcast signal, and a KBPS code is compared for each channel, thereby making a strong signal channel for the same channel. The present invention relates to a channel automatic setting apparatus and method using a KBPS code capable of selectively storing only bays.

Recently, due to the development of electronic technology, electronic products have been diversified in their functions. In particular, in the case of a TV, more practical functions have been added in addition to a function of simply receiving a signal transmitted from a broadcasting station, and convenience for use has been emphasized.

On the other hand, as the number of broadcasters increased, users felt inconvenient in selecting a channel.As a result, an ACMS (Auto Channel Memory System) function, that is, a function of automatically searching for a broadcast channel and storing and setting searched channel data in a memory, was developed. It has been.

FIG. 1 is a diagram showing the internal structure of a general TV receiver having an automatic channel search function. In FIG. 1, reference numeral 1 denotes an antenna, and 2 denotes an RF amplifier for amplifying an RF signal received through the antenna 1. And 3 is a mixer which mixes the RF signal from the RF amplifier 2 and the oscillation frequency from the local oscillation circuit 17 to be described later to generate an intermediate frequency signal (IF signal).

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 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 a PWM generator 12. 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 controls the PWM generator 12 based on this to generate a predetermined PWM signal. The PWM signal is a channel selected by the viewer through the integrating circuit 13 at this time. It is output as a voltage control signal corresponding to.

Subsequently, reference numeral 14 denotes an automatic fine tuning (AFT) circuit provided for precise tuning operation, and 15 denotes a voltage signal applied from the integrating circuit 13 and the AFT circuit 14. 16 is a local oscillation circuit, which generates a predetermined frequency signal according to the level of the voltage signal applied through the adder 15 and outputs it to the mixer 3 to execute a broadcasting station. Done.

That is, the local oscillation circuit 16 changes the local oscillation frequency output according to a change in ambient temperature or time. When the local oscillation frequency fluctuates in this way, the intermediate frequency output from the mixer 3 is fluctuated so that stable image reproduction is impossible.

The AFT circuit 14 is provided to solve the above problem, which is output from the local oscillation circuit 16 by outputting a voltage signal (± ΔV) with respect to the fluctuation range Δf of the intermediate frequency to the adder 15. It is to stabilize the local oscillation frequency.

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 2 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, the base, treble, and volume according to the control signal from the microprocessor 11 are not shown. A speech processing section for executing speech processing, and 19 denotes a speech amplifying section for amplifying and outputting the speech signal processed by the speech processing section 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. A CRT driver 24 for driving a synchronous signal detector for detecting a synchronous signal from the video signal output from the image detector 7, and 25 for a broadcast channel in which the synchronous signal is detected by the synchronous signal detector 24. A retrieval channel storage for storing the channel data.

That is, in the device having the above-described configuration, when the viewer executes the broadcasting station through the remote control device 18, the viewer processes the video and audio signals for the corresponding channel and outputs them through the CRT 23 and the speaker 20, respectively. If the user presses the automatic channel search selection key installed in the remote control device or the like as necessary, the channel for receiving the broadcast signal is automatically searched based on the synchronization detection by the synchronization signal detection unit 24.

However, in the conventional automatic channel search apparatus, since the same broadcast channel can be set to be overlapped with different numbers due to the influence of adjacent channels or channel interference, the user has to search for and erase the unnecessary redundant channels one by one. .

The present invention was created in view of the above circumstances, by detecting the KBPS code from the broadcast signal when the ACMS (Auto Channel Memory System) function is executed, and comparing the KBPS code for each channel, by selectively storing only the strong signal channel for the same channel, It is an object of the present invention to provide an automatic channel setting apparatus and a method for preventing a phenomenon in which the same channel is overlapped due to a proximity channel signal or an interference channel signal.

An apparatus for automatically setting a channel of a television according to the present invention for achieving the above object is to adjust the output level of a video signal by controlling the amplification degree inside the tuner based on a tuner (TUNER) for a broadcast channel and the output level of the video signal. A television receiver comprising: a retrieval channel storage means for storing channel data set by an AGC circuit and a channel automatic setting function for controlling the data; KBPS code detection means for separating and detecting the KBPS code signal from the broadcast signal, synchronization signal detection means for detecting a synchronization signal from the broadcast signal tuned through the tuner, and when the synchronization signal is detected by the synchronization signal detection means AGC level storage means for storing the data corresponding to the code signal detected by the KBPS code detection means and the AGC level of the channel output through the AGC circuit together with the channel data, KBPS for each channel stored in the AGC level storage means Control means for detecting whether the same broadcast channel exists by comparing codes, and comparing and calculating the AGC level data for the same broadcast channel, and selectively storing the broadcast channel having the minimum AGC level in the search channel storage means. Characterized in that; According to an aspect of the present invention, there is provided a television channel automatic setting method comprising: a television automatic channel setting method for automatically searching for and storing a signal channel with respect to a received television signal; Code data detection step of detecting KBPS code data from a corresponding broadcast signal when a synchronization signal is detected in the currently tuned channel, and a signal signal data storage step of storing channel data, KBPS code data, and AGC levels of the selected channel in correspondence with each other. Among the stored data, KBPS codes are compared for each channel to detect whether the same broadcast channel exists, and for the same broadcast channel, the AGC level data is compared and calculated to store channel data having the lowest AGC level as the basis data of channel selection. And a channel tuning data storage step.

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

2 is a diagram showing the internal configuration of another channel automatic setting apparatus according to the first embodiment of the present invention. The same components as those of FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 2, reference numeral 124 denotes an A / D converter which converts and outputs an analog AGC signal output from the AGC circuit 17 into a digital signal, and 126 separates a KBPS code signal among broadcast signals transmitted from a broadcasting station. The KBPS decoder 127 to detect is an AGC level storage unit for storing AGC levels for each channel as data. The microprocessor 111 stores the AGC level when the signal signal channel is selected by the synchronization signal detector 24. In the unit 127, the corresponding code signal detected by the KBPS decoder 126 along with the channel data at this time and the AGC level of the corresponding channel are stored in correspondence with each other.

The operation of the apparatus having the above-described configuration will be described below with reference to the flowchart shown in FIG.

First, when the user selects a channel automatic setting key (not shown) installed in the remote controller 8 (ST1), the microprocessor 111 is output to the PWM generator 12 for broadcasting station. The channel is searched (ST2) while the predetermined control signal is sequentially changed at predetermined time intervals, and the KBPS coder 126 detects the KBPS code from the broadcast signal.

Meanwhile, while the channel search is executed, the synchronization signal detection unit 24 continuously checks whether or not the signal channel is tuned based on the synchronization signal detection (ST3). In this case, the synchronization signal detection unit 24 determines the presence of the signal channel. When this is detected, the microprocessor 111 sequentially associates the corresponding code signal detected by the KBPS decoder 126 with the channel data at this time and the AGC level of the corresponding channel to the AGC level storage unit 127. Save to (ST 4).

Subsequently, the microprocessor 111 determines whether all the searches for the remaining channels are completed according to the search order (ST 5). When the channel search for all the channels is completed, the microprocessor 111 is completed. Compares the KBPS codes of the channels detected by the KBPS decoder 126, reads data stored in the AGC level storage unit 127 for the same channel, and compares and compares the AGC levels for each channel. (ST 6), a channel with a minimum AGC level is selected for each channel as a result of the calculation and stored in the search channel storage unit 125 (ST 7), and the data stored in the AGC level storage unit 127 is cleared. By pressing (ST 8), the automatic channel setting function is completed.

That is, according to the embodiment, when executing the Auto Channel Memory System (ACMS) function, the KBPS code is detected from the broadcast signal and the KBPS is compared for each channel to store and store only the strong signal channel for the same channel. This prevents the same channel from overlapping.

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.

Claims (2)

By storing the channel data set by the tuner (TUNER), the AGC circuit for controlling the output level of the video signal constantly by controlling the amplification degree inside the tuner based on the output level of the video signal and the channel automatic setting function. A television receiver having a search channel storage means; KBPS code detection means for separating and detecting the KBPS code signal from the broadcast signal, synchronization signal detection means for detecting a synchronization signal from the broadcast signal tuned through the tuner, and when the synchronization signal is detected by the synchronization signal detection means AGC level storage means for storing the AGC level of the corresponding channel output through the AGC circuit and the corresponding code signal detected by the KBPS code detection means together with the channel data, KBPS for each channel stored in the AGC level setting means Control means for detecting whether the same broadcast channel exists by comparing codes, and comparing and calculating the AGC level data for the same broadcast channel, and selectively storing the broadcast channel having the minimum AGC level in the search channel storage means. Automatic channel setting device using a KBPS code, characterized in that. A channel automatic setting method of a television for automatically searching for and storing a signal channel with respect to a received television signal; Code data detection step of detecting KBPS code data from a corresponding broadcast signal when a synchronization signal is detected in the currently tuned channel, and a signal signal data storage step of storing channel data, KBPS code data, and AGC levels of the selected channel in correspondence with each other. Among the stored data, KBPS codes are compared for each channel to detect whether the same broadcast channel exists, and for the same broadcast channel, the AGC level data is compared and computed so that the channel data having the lowest AGC level is used as the basis data of channel selection. Channel auto-setting method using KBPS, characterized in that the channel tuning data storage step comprising the step of storing.