KR19990016498A - Automatic channel setting method of satellite broadcasting receiver - Google Patents

Abstract

According to the present invention, an input signal is searched for all frequency bands inputted from an arbitrary satellite broadcasting antenna by using a center frequency for each section, and according to the result of the search, an output band of the satellite broadcasting receiving antenna is found and a corresponding channel band is found. The present invention relates to an automatic channel setting method of a satellite broadcasting receiver capable of receiving all satellite broadcasts regardless of the type of antenna, the first channel setting a center frequency of a plurality of frequency channels for each section according to a predetermined input signal frequency range. step ; Detecting an input signal based on the center frequency; A third step of setting a channel group of a center frequency in which the detected signal amount is greater than or equal to a predetermined level; A fourth step of discriminating a broadcast signal source from input signal data of one channel in the set channel group; A fifth step of comparing the broadcast signal source corresponding to the channel with the determined broadcast signal source; And a sixth step of designating and storing a channel in the predetermined input signal frequency range if the broadcasting signal source is the same. It consists of, including, automatically detects the output frequency band set differently according to the manufacturer of the antenna, recognizes the output band of the installed antenna and automatically stores the data for tuning the input signal accordingly, even if the antenna is different from manufacturer to manufacturer Nevertheless, it is compatible and can be purchased and installed by changing the antenna or satellite broadcasting receiver respectively. It is very convenient to maintain the device, and it is a useful invention that eliminates economic disadvantages such as the need to purchase a new antenna for matching with the receiver. It can be said.

Description

Automatic channel setting method of satellite broadcasting receiver

The present invention relates to an automatic channel setting method of a satellite broadcasting receiver that automatically sets a channel of a satellite broadcasting so that the satellite broadcasting can be viewed with an arbitrary receiving antenna, and more particularly, can be input from any satellite broadcasting receiving antenna. Search the input signal using the center frequency of each frequency band by section, and find the output band of the satellite broadcasting receiving antenna according to the search result, and set the channel band according to it. The present invention relates to an automatic channel setting method of a satellite broadcasting receiver that enables reception.

The satellite satellite downlink signal has a frequency range of 11.71 kHz to 12.01 kHz, which is received by the satellite antenna and based on the local oscillation frequency of the frequency converter 20 installed in the antenna unit. The output is downconverted.

In the conventional satellite broadcasting receiver for receiving the output signal, as shown in FIG. 1, a ROM (ROM) that stores the center frequency and phase synchronization data of each repeater (channel group) based on the local oscillation frequency ( 50); A tuner (30) for tuning the frequency band outputted from the low pass on the basis of the center frequency and phase synchronization data (PLL data); A controller 40 for controlling the tuner 30 to tune a frequency band corresponding to the center frequency of the ROM 50; An analog / digital converter (hereinafter, referred to as an 'A / D converter') 60 for converting and outputting the tuned output analog signal into a digital signal; A demodulator (70) for demodulating the digitally converted modulated (QPSK) signal into an original digital signal; An error corrector (80) for detecting and correcting an error in the demodulated digital signal; A demultiplexer (90) for separately outputting the error corrected complex data; MPEG decoder (L00) for decoding video and audio data of the separated output signal and restoring video and audio: Broadcast signal converter 110 for converting and outputting the restored video data to a broadcast signal (NTSC or PAL, etc.). ); And a voice signal processor 120 for converting and outputting the restored audio data into an analog audible signal.

In the satellite broadcasting receiver configured as described above, first, the frequency converter 20 in addition to the antenna unit 11 mixes a signal of 11.71 kHz to 12.01 kHz input from the antenna 10 with a local oscillation frequency stored in itself. The tuner 30 receives the low frequency-converted frequency band. In the case of an LG electronic antenna having a local oscillation frequency of 10.678 kHz of the frequency converter 20 installed in the antenna unit 11, the tuner 30 The low-converted frequency band received by λ is 1032 MHz to 1332 MHz.

The low-frequency converted frequency band is input to the tuner 30, and the control unit 40 matches the local oscillation frequency of the frequency converter 20 of the antenna unit 11 with reference to FIG. The PLL data stored in the form as described above reads data corresponding to the channel requested by the user and transmits the data to the tuner 30, and the tuner 30 generates a center frequency corresponding to the transmitted PLL data. The signal band of the input frequency band is tuned and transmitted to the A / D converter 60. The A / D converter 60 converts and outputs an input analog signal into a digital signal, and the demodulator 70 demodulates and outputs the converted digital modulated signal into original digital data. The demodulated digital data is output as an image through the demultiplexer 90, the MPEG decoder 100, and the broadcast signal converter 110 after the transmission error is corrected by the error corrector 80, and the MPEG decoder 100 The audio data output from) is output to the audio signal processor 120 and converted into an audible signal, thereby allowing viewers to watch satellite broadcasts.

However, in the conventional satellite broadcasting receiver configured as described above, when the manufacturer of the antenna and the satellite broadcasting receiver are different, for example, when the manufacturer of the antenna is LG Electronics and the manufacturer of the satellite broadcasting receiver is Samsung Electronics, the output frequency of the antenna While the band ranges from 1032 MHz to 1332 MHz, the tuning band of Samsung's satellite broadcasting receiver is 960 MHz to 1260 MHz, which is adjusted to its antenna output band. Is not received, and the channel in the receivable repeater also has a poor reception state because the center frequency is not set correctly, and there is a problem that a broadcast to be received from a channel of a specific repeater is received from a channel of another repeater.

Therefore, the user who wants to watch satellite broadcasting had to bear a lot of trouble in purchasing, repairing or replacing after installation due to the limitation that the receiver and antenna must be manufactured by the same company.

Accordingly, the present invention has been created to solve the above problems, by identifying the installed antennas and automatically setting resistance of the satellite broadcasting channels in all the repeaters corresponding thereto, the satellite broadcasting channel can be received by any antenna. The purpose is to provide an automatic channel setting method of a satellite broadcasting receiver.

1 illustrates a configuration of a receiver for conventional satellite broadcasting reception;

2 illustrates a configuration of a satellite broadcasting receiver for implementing an automatic channel setting method of a satellite broadcasting receiver according to the present invention.

3 is a flowchart of an embodiment of an automatic channel setting method of a satellite broadcasting receiver according to the present invention;

4 and 5 are flowcharts of another embodiment of an automatic channel setting method of a satellite broadcasting receiver according to the present invention;

6 and 7 are graphs of the difference between the output signal band and the center frequency according to the local oscillation frequency of the antenna,

8 shows a virtual range of output signal frequency bands of various antennas.

Explanation of symbols for main parts of the drawings

10 antenna 11 antenna portion

20: frequency converter 30: tuner

40,400: control unit 50,500: ROM

60: analog-to-digital converter 70: demodulator

80: Forward Error Correction

90: demultiplexor 100: MPEG decoder

110: broadcast signal converter 120: voice signal processor

130: signal detector

According to an aspect of the present invention, there is provided a method for automatically setting a channel of a satellite broadcasting receiver, the method comprising: setting a center frequency of a plurality of frequency channels for each section according to a predetermined input signal frequency range; Detecting an input signal based on the center frequency; A third step of setting a channel group of a center frequency in which the detected signal amount is greater than or equal to a predetermined level; A fourth step of discriminating a broadcast signal source from input signal data of one channel in the set channel group; A fifth step of comparing the broadcast signal source corresponding to the channel with the determined broadcast signal source; And a sixth step of designating and storing a channel in the predetermined input signal frequency range if the broadcasting signal source is the same. It is made, including;

Setting a center frequency of a plurality of frequency channels for each section according to a predetermined input signal frequency range; Detecting an input signal based on the center frequency; A third step of counting a channel group of a center frequency when the detected signal amount is greater than or equal to a predetermined level; A fourth step of comparing whether the number of counted channel groups and the number of pre-allocated channel groups are the same; And a fifth step of designating and storing a channel in the predetermined input signal frequency range when the number of channels is the same as the comparison result.

Selecting a predetermined input signal frequency range having a frequency section which does not overlap in a plurality of predetermined input signal frequency ranges; Setting a center frequency of a plurality of frequency channels in the non-overlapping frequency section of the selected input signal frequency range; Detecting an input signal based on the center frequency; And a fourth step of designating and storing a channel in the selected input signal frequency range when the detected signal amount is above a predetermined level.

In the automatic channel setting method of the satellite broadcasting receiver according to the present invention as described above, first, one of a plurality of predetermined input signal frequency ranges is selected, and the center frequencies of a plurality of frequency channels in an arbitrary range within the range are set. The input signal is tuned at a frequency to detect the output amount. When the detected signal amount is higher than or equal to a predetermined level, one of the channel groups assigned to the corresponding center frequency is tuned to discriminate the broadcast signal source from the tuned broadcast signal data, and to match the broadcast signal source corresponding to the channel. Compare. As a result of the comparison, if the broadcast signal source is the same, the selected input signal frequency range is identical to the output band of the antenna, and thus the channel is designated and stored in the selected input signal frequency range, and the broadcast signal source is not the same or the detected signal. If the amount is not more than a predetermined level, the above-described process is repeated by selecting another predetermined input signal frequency range.

In another method of automatic channel setting of a satellite broadcasting receiver, one of a predetermined frequency range of an input signal is selected, a center frequency of a plurality of frequency channels for each section within the range is set, and the input signal is synchronized with the set center frequency. The output amount is detected. If the detected signal amount is greater than or equal to a predetermined level, the coefficient value is increased, and the above-described process is repeated for a plurality of frequency channels in all remaining sections within the selected input signal frequency range, and then the increased coefficient value and pre-allocation are performed. Compare whether the number of repeaters (channel group) is the same. As a result of the comparison, if the values are identical, the center frequency and the channel according to the selected input signal frequency range are designated and stored, and if not identical, another predetermined input signal frequency range is selected and the above-described process is repeated.

In another method of automatic channel setting of a satellite broadcasting receiver, a predetermined input signal frequency range having a frequency section not overlapping with another predetermined input signal frequency range among a plurality of predetermined input signal frequency ranges is selected, and the selected input signal frequency is selected. After setting a center frequency of a plurality of frequency channels in the non-overlapping frequency range of the range, the input signal is tuned to the set center frequency to detect the output amount. If the detected signal amount is greater than or equal to a predetermined level, the center frequency and channel according to the selected input signal frequency range are designated and stored, and if the detected signal amount is not greater than or equal to a predetermined level, the selected input signal frequency range is The above-described process is repeated by selecting a predetermined input signal frequency range having a frequency section that does not overlap with other input signal frequency ranges among a plurality of predetermined input signal frequency ranges excluding.

Hereinafter, preferred embodiments of an automatic channel setting method of a satellite broadcasting receiver according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating a satellite broadcast receiver in which the automatic channel setting method of the satellite broadcast receiver according to the present invention is implemented. A / D converter 60; Demodulation unit 70; An error corrector 80; Demultiplexer 90; MPEG decoder 100; A broadcast signal converter 110; And a voice signal processor 120 and a ROM 500 in which the center frequency and PLL data of each repeater according to the local oscillation frequency of the antenna of each manufacturer are stored. A control unit 400 for controlling the tuner 30 to read the PLL data of the ROM 500 and tune the frequency band; And a signal detector 130 that detects a signal output from the tuner 30 and outputs data according to the detected signal amount.

3 is a flowchart illustrating an embodiment of an automatic channel setting method of a satellite broadcasting receiver according to the present invention. Hereinafter, the satellite broadcasting receiver of FIG. 3 according to the present invention will be described with reference to the configuration of the satellite broadcasting receiver of FIG. The automatic channel setting method will be described in detail.

First, a low-conversion signal band is input to the tuner 30 in the same manner as the conventional method by the frequency converter 20 other than the antenna unit 11. If the antenna 10 is an antenna of LG Electronics, the tuner 30 is input. ), A frequency band of 1032 MHz to 1332 MHz is input, and a frequency band of 960 MHz to 1260 MHz is inputted if the antenna of Samsung Electronics. The control unit 400 first selects an input frequency range of 1032 MHz to 1332 MHz from the PLL data stored in the ROM 500 as shown in FIG. 7 to generate the center frequency of the repeater 2 among them. Phosphorus 3061h is read out and applied to the tuner 30 (S2).

The tuner 30 generates a 1068.66 MHz, which is a center frequency corresponding to 3061h data, and tunes a signal band (bandwidth of about 50 MHz) corresponding to the center frequency generated in the frequency band of the input signal. 130 detects the amount of the signal output to be tuned (S11) and transmits it to the control unit 400.

On the other hand, the signal detector 130 in the tuner 30, instead of detecting the amount of the tuned output signal as described above, when one or more broadcast channels are not assigned to all of the satellite broadcast repeaters of FIG. It is possible to replace the detection signal amount by directly receiving the carrier of each tuned repeater and detecting the presence or absence of the carrier.

The control unit 400 selects one channel from 31 to 34 channels, which are channels of the repeater 2, if the amount of detected detection signals is greater than or equal to a predetermined level (S12) (S13), and decodes the broadcast signal information of the channel to demultiplexer. It is obtained through PAT (Program Association Table), PMT (Program Map Tab1e) and PID (Packet Identifier) information received from 90 (S14).

The control unit 400 compares the obtained broadcast signal source of one channel with the broadcast signal source of the channel previously stored in the ROM 500 (S41). In the case where the TV is 31 and the broadcasting signal source of 31 channels previously stored in the ROM 500 is the same as the star TV, the installed antenna has an input frequency range (1032 MHz to 1332 MHz) currently read by the control unit 400. Since the antenna corresponds to the antenna, the center frequency (PLL data) and the channel are read out and set (S42), and the controller 400 uses the repeater and channel frequency information stored therein at a later user request. This will tune the satellite signal.

If the signal band tuned to the center frequency set in the tuner 30 is not detected and the detected signal amount is less than a predetermined level (S12), since the installed antenna does not output the corresponding band, it is currently being read. If the input frequency range is determined to be inappropriate and the broadcasting signal sources are not the same as a result of the comparison of the broadcasting signal sources, the overlapping area between the output band of the installed antenna and the input frequency range currently being read (LG Electronics Repeater 2 And the repeater 6 of Samsung Electronics, etc.), it is determined that the frequency range does not correspond to the installed antenna. Also, the control unit 400 has a different input frequency range (960MHz to 7) from the ROM 500. 1260MHz), and accordingly set the center frequency for each section in the tuner 30 (S31), and repeat the above process until the broadcast signal source is the same. It is blessed.

After the channel is automatically set by the above method, when the user's channel selection is input to the control unit 400, the control unit 400 tunes the tuner 30 to the repeater to which the channel belongs in the stored input frequency range. In addition, the tuned signal is decoded by a data string having a corresponding channel number (PID) through the same process as that of a conventional process, and then output after being processed by the broadcast signal converter 110 and the voice signal processor 120, respectively. In addition, the viewer can watch a broadcast corresponding to the input satellite broadcast channel.

4 and 5 are flowcharts according to another embodiment of the automatic channel setting method of the satellite broadcasting receiver according to the present invention. Hereinafter, another embodiment of the automatic channel setting method of the satellite broadcasting receiver according to the present invention will be described with reference to the flowchart. The operation of the example will be described in detail.

First, the controller 400 selects one of the plurality of input frequency ranges (1032 MHz to 1332 MHz) stored in the ROM 500, and selects PLL data corresponding to the center frequency for each section within the selected input frequency range. In turn, it transmits to the tuner 30 and detects the amount of the tuned signal accordingly. First, a 3061h code corresponding to the PLL data of the repeater 2 is transmitted to the tuner 30 (S62), and the tuner 30 is connected thereto. A corresponding center frequency (1068.66 MHz) is generated to tune the input signal.

The signal detector 130 detects a tuned signal amount (or presence of a tuned repeater carrier) (S71) and transmits the signal to the control unit 400, and the control unit 400 detects that the detected signal amount is higher than or equal to a predetermined level (S72). The number of detected repeaters is increased (S73) and the increased number of detected repeaters is compared with the number of repeaters 6 allocated to satellite broadcasting (S102). As a result of the comparison, if the number of repeaters is the same, the output band of the installed antenna and the input frequency range currently read by the controller 400 correspond to each other, and accordingly, the center frequency (PLL data) and the channel are stored and set accordingly (S103). If the number of channels is not the same as the result of the comparison, a PLL value corresponding to the center frequency of the next section within the currently selected input frequency range is transmitted to the tuner 30 (S111), detection (S71), and determination (S72). The process of

During the process, if the amount of signal detected from the signal band tuned by the tuner 30 at the set center frequency is less than or equal to a predetermined level, the input frequency range currently selected and read out and the output band of the installed antenna are inappropriate. Since the control unit 400 reads a different input frequency range (960 MHz to 1260 MHz) and each center frequency from the ROM 500 (S91) and transmits the same to the tuner 30, the other input frequency. You will be asked to confirm the range and the installed antenna.

FIG. 8 illustrates virtually the output frequency band according to the local oscillation frequency of each manufacturer's antenna for explaining another method of automatic channel setting of the satellite broadcasting receiver according to the present invention of FIG. 5. They overlap each other.

First, the controller 400 finds an antenna installed from various antennas A, B, C, D,... Having an output band as shown in FIG. 8, that is, a signal band input to the tuner 30. An input frequency range (either A or D) having a frequency section that does not overlap with each other is selected from the ROM 500 in which a signal band and a center frequency are stored (S122). The control unit 400 stores PLL data for generating a center frequency of any repeater in a non-overlapping frequency range (relay 2 when A is selected and repeater 12 when D is selected) among previously selected input frequency ranges. Read from the ROM 500 and apply to the tuner (30) (S123), the tuner 30 generates a corresponding center frequency to tune the output signal.

The signal detector 130 detects the amount of the signal to be synchronized output (S131) and transmits it to the control unit 400, and the control unit 400 checks whether the detected signal amount is above a predetermined level (S132). If it is above a certain level, the antenna corresponding to the currently selected input frequency range (A antenna is detected by A repeater 2 of A and D antenna is detected by D repeater 12 of D) is installed. The center frequency (PLL data) and the channel of each repeater according to the frequency range are stored and set in the controller 400 (S134).

If the amount of signal tuned by the center frequency set in the tuner 30 is less than or equal to a predetermined level (S132), the control unit 400 controls a plurality of input frequency ranges A, B, C, and the like in the ROM 500. D…) removes the input frequency range (A or D) just detected (S141), and checks the number of remaining input frequency ranges (S151). If the number of remaining input frequency ranges is 2 or more, the control unit 400 includes a plurality of input frequency ranges (B, C, and D when A is searched, and A, B, and C when D is searched. In this case, an input frequency range having a frequency section that does not overlap again is selected (A is one of C and D when the previous search is performed, and one of A and B when D is searched immediately) (S122) The procedure is performed again to find and set the center frequency and channel.

In the process of repeating the above method, if there is only one number of the remaining input frequency ranges excluding the immediately searched input frequency range (S151), the control unit 400 corresponds to the output band of the installed antenna. It is apparent that the center frequency and the channel corresponding to the residual input frequency range are stored and set in the controller 400 without using the signal detection for the residual input frequency range (S152) and used for subsequent channel selection.

The automatic channel setting method of the satellite broadcasting receiver according to the present invention, as described above, automatically detects the output frequency band set differently according to the manufacturer of the antenna, recognizes the output band of the installed antenna, and tunes the input signal accordingly. By automatically memorizing data, the antennas are compatible even though they are different from manufacturer to manufacturer. The antennas or satellite broadcasting receivers can be changed and installed during use, so the maintenance of the device is very convenient and new for matching with the receiver. It can be said to be a useful invention that eliminates economic disadvantages such as the need to purchase an antenna.

Claims (7)

A first step of setting center frequencies of a plurality of frequency channels for each section according to a predetermined input signal frequency range; Detecting an input signal based on the center frequency; A third step of setting a channel group of a center frequency in which the detected signal amount is greater than or equal to a predetermined level; A fourth step of discriminating a broadcast signal source from input signal data of one channel in the set channel group; A fifth step of comparing the broadcast signal source corresponding to the channel with the determined broadcast signal source; And a sixth step of designating and storing a channel in the predetermined input signal frequency range if the broadcasting signal source is the same. The method of claim 1, wherein, as a result of the comparison in the fifth step, if the broadcast signal sources are not the same, setting the center frequencies of the plurality of frequency channels for each section according to different predetermined input signal frequency ranges and repeating from the second step. An automatic channel setting method of a satellite broadcasting receiver characterized in that. The method of claim 1, wherein in the third step, when the detected signal amount in the second step is less than or equal to a predetermined level, a center frequency of a plurality of frequency channels for each section according to another predetermined input signal frequency range is set; Automatic channel setting method of the satellite broadcasting receiver, characterized in that repeating from. A first step of setting center frequencies of a plurality of frequency channels for each section according to a predetermined input signal frequency range; Detecting an input signal based on the center frequency; A third step of counting a channel group of a center frequency when the detected signal amount is greater than or equal to a predetermined level; A fourth step of comparing whether the number of counted channel groups and the number of pre-allocated channel groups are the same; And a fifth step of designating and storing a channel in the predetermined input signal frequency range when the number of channels is the same, as a result of the comparison. Selecting a predetermined input signal frequency range having frequency intervals that do not overlap in a plurality of predetermined input signal frequency ranges; Setting a center frequency of a plurality of frequency channels in the non-overlapping frequency section of the selected input signal frequency range; Detecting an input signal based on the center frequency; And a fourth step of designating and storing a channel in the selected input signal frequency range when the detected signal amount is greater than or equal to a predetermined level. Automatic channel setting method of the satellite broadcasting receiver comprising a. 6. The method of claim 5, wherein in the fourth step, if the detected signal amount is less than or equal to a predetermined level, another predetermined input signal frequency range having a frequency section that does not overlap in a plurality of predetermined frequency ranges excluding the selected input signal frequency range is selected. Selecting and repeating from the second step. 6. The method of claim 5, wherein in the fourth step, if the detected signal amount is less than or equal to a predetermined level, the selected input signal frequency range is excluded, and if the remaining predetermined input signal frequency range is one, the channel is divided into the input signal frequency range. Automatic channel setting method of a satellite broadcasting receiver characterized in that the designation and storing.