JPH10224248A - Receiver for satellite broadcast and method for adjusting direction of antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate an input signal to be a broadcast signal from a desired satellite, in the case of installation of a reception antenna for a satellite broadcast. SOLUTION: When a reception antenna 1 for a satellite broadcast is installed, a level of a reception signal calculated by a CPU 21 based on a C/N of the reception signal only in the case that identification information indicating a genre of a satellite broadcast service is obtained from the reception signal inputted to the reception antenna 1, and the identification information are the information based on a desired satellite broadcast service, is displayed on a screen 4s of a television receiver 4 in numerals and bars. A high/low beep tone Sbp is generated in place of the screen display of the reception signal level or in addition to the screen display, corresponding to the increase/decrease in the C/N of the reception signal level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast receiving apparatus and an antenna direction adjusting method suitable for adjusting the installation direction of a satellite broadcast receiving antenna.

[0002]

2. Description of the Related Art In satellite broadcasting in Japan, a satellite broadcasting service (hereinafter referred to as BS broadcasting) using analog video signals was first implemented using a broadcasting satellite (BS). This BS broadcast is transmitted, for example, in a 12 GHz band from a broadcast satellite launched into a geosynchronous orbit at a distance of 36000 km above the equator, and can provide high-quality video and audio without ghost interference.

[0003] Then, similarly to the BS, a plurality of communication satellites (CS) are launched in a geosynchronous orbit above the equator at predetermined longitude intervals such as 4 ° and 8 °, and using these communication satellites, Satellite broadcasting services (hereinafter referred to as CS broadcasting) using analog video signals have been implemented.

Recently, satellite broadcasting services (hereinafter referred to as digital broadcasting) using digital video signals have been implemented using communication satellites. This digital broadcast is on the cusp of accelerating in the future, with the participation of new broadcasters.

[0005] The above-mentioned BS broadcast, CS broadcast and digital CS broadcast have different transmission systems, respectively.
Due to scrambling, etc., dedicated receiving devices (Integrated Receive
erDecoder) is required.

Since the orbital positions of the satellites are different from each other, it is necessary to prepare a receiving antenna such as a parabolic antenna corresponding to each satellite, and to properly adjust the orientation (azimuth and elevation) of the receiving antenna at the time of installation. There is.

For this reason, conventionally, this type of satellite broadcast receiving apparatus has a function of displaying an antenna input level on a screen for convenience of adjusting the direction of a receiving antenna at the time of installation. There is something (for example, 2-24
253).

FIG. 4 is a diagram for explaining this type of satellite broadcast receiving apparatus. As shown in FIG. 4, the output signal of, for example, a 1 GHz band is output from the converter 2 integrated with the receiving antenna 1 to the receiver 10 for satellite broadcasting.
It is supplied through a coaxial cable 3. At the time of adjusting the antenna orientation, the satellite broadcast receiving apparatus 10 calculates the antenna input level based on the C / N (carrier to noise ratio) of the output signal of the converter 2 and incorporates the so-called OSD.
The video signal output for displaying the antenna input level using the (on-screen display) function is displayed on the display screen 4s of the monitor receiver 4.

In this case, the antenna input level is
As shown in FIG. 4, when the direction of the antenna is adjusted,
The maximum value up to that point and the input level value (current value) in the direction of the antenna at that time are numerically displayed and displayed as bars.

The viewer adjusts the azimuth angle θ and the elevation angle φ of the receiving antenna 1 so that the current value becomes the maximum value on the screen 4 s, so that the broadcast signal S from the desired satellite STd is adjusted.
The receiving antenna 1 can be installed in a correct direction for receiving gd.

[0011]

However, in the geosynchronous orbit above the equator, a plurality of communication satellites are launched at relatively small longitude intervals, such as 4 ° and 8 °, as described above. Even if the direction of the receiving antenna 1 is adjusted to receive the broadcast signal Sgd from the desired satellite STd,
When the adjustment of the azimuth angle θ is not correct, a broadcast wave from an adjacent undesired satellite STu may be captured, and the undesired broadcast signal Sgu may be input to the receiving antenna 1.

In this case, the conventional satellite broadcast receiving apparatus 10
Then, as described above, the C / N of the output signal of converter 2
, The antenna input level is displayed in spite of the broadcast signal Sgu from the undesired satellite STu having a different transmission system. For this reason, the viewer sees the display of the antenna input level and mistakenly recognizes that the desired satellite STD has been captured, so that the number on the screen 4s is maximized.
There is a possibility that the direction of the receiving antenna 1 may be adjusted to the undesired satellite STu by continuing the adjustment.

Then, such an undesired satellite STu
When the direction of the receiving antenna has been adjusted, the viewer will be prompted by the fact that the broadcast signal transmission method and scramble method are different when the satellite broadcast receiving device is set to the broadcast receiving mode. The broadcast signal cannot be received and the broadcast signal is from an undesired satellite broadcast service. Then, after that, the viewer sets the receiving antenna 1
In this case, it is necessary to perform an operation of adjusting the direction of the receiving antenna again, and there is a problem that it takes much time and effort to adjust the direction of the receiving antenna.

Further, when the direction of the receiving antenna is adjusted to the undesired satellite STu, the viewer who cannot recognize that it is another undesired satellite broadcasting service from another adjacent satellite is not recognized. In such a case, there is a possibility that the satellite broadcast receiving apparatus may be erroneously recognized as being out of order.

[0015] In the scramble of the analog satellite broadcasting, even if the scramble is not canceled, an image-like thing can be seen.
From the content of the broadcast program, it can be determined whether or not it is a desired satellite broadcast. However, in digital satellite broadcasting, since no image is displayed unless the scramble is released, it is impossible to determine whether or not the satellite broadcasting is the desired satellite broadcasting. It becomes a problem.

In view of the above, the present invention provides a satellite broadcast receiving apparatus and an antenna direction adjusting method capable of easily and surely adjusting the direction of a receiving antenna to a desired satellite direction. It is in.

[0017]

In order to solve the above-mentioned problems, a satellite broadcast receiving apparatus according to the present invention includes a satellite broadcast receiving means for notifying the level of a received signal input to a receiving antenna. In the receiving device, there is provided notification control means for obtaining identification information indicating the type of satellite broadcasting service from the received signal and operating the antenna input level notification means only when the identification information is that of a desired satellite broadcasting service. It is characterized by having.

Further, the method for adjusting the orientation of a satellite broadcast antenna according to the present invention includes the steps of:
By notifying the level of the received signal input according to the direction of the receiving antenna, in the method of adjusting the direction of the receiving antenna for satellite broadcasting, the identification information indicating the type of the satellite broadcasting service is obtained from the received signal. Only when the identification information is for a desired satellite broadcasting service, the level of the received signal is notified.

Since the antenna input level informing means is operated only when a radio wave from a desired satellite is received, the direction of the antenna can be easily and reliably adjusted to the desired satellite.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a satellite broadcast receiving apparatus according to the present invention will be described for a digital satellite broadcast receiving apparatus with reference to FIGS.

FIG. 1 shows the configuration of the satellite broadcast receiving apparatus of this example.
Shown in In FIG. 1, portions corresponding to those in FIG. 4 are denoted by the same reference numerals, and a part of the description will be omitted.

In FIG. 1, a digital satellite broadcast receiving apparatus 10D includes a tuner circuit 11, a decoding circuit 12, a video signal processing circuit 13, an audio signal processing circuit 14, a beep sound generating circuit 15, and a microcomputer 20. The receiving apparatus 10D has an antenna orientation adjustment mode in addition to the broadcast normal reception mode, and the microcomputer 20 performs control in each of these modes.

An output signal from the converter 2 integrated with the receiving antenna 1 is supplied to the tuner circuit 11 through the coaxial cable 3 to demodulate data such as video and audio data. Is subjected to a predetermined decoding process. The video signal and the audio signal from the decoding circuit 12 are sent to the corresponding signal processing circuit 13
And 14 are subjected to predetermined processing and supplied to the video input terminal 4v and the audio input terminal 4a of the television receiver 4.

The beep sound generation circuit 15 is used in the antenna direction adjustment mode. In this example, the beep sound generation circuit 15 generates two types of beeps, a high-pitched beep and a low-pitched beep. Which beep sound is generated from the beep sound generation circuit 15 is determined by a control signal supplied from the microcomputer 20 to the beep sound generation circuit 15.

The microcomputer 20 includes a CPU 21
And a ROM 22 storing various control programs such as an antenna orientation adjustment routine described later, a RAM 23 mainly used as a work area for calculation, and a video RAM 24. Connected. The video RAM 24 is an OSD (on-screen display) that generates a display image of an antenna input level to be displayed on a screen of the television receiver 4 described later.
It is for configuring the function of.

Although not shown, the receiving device 10D
For example, a display unit including a liquid crystal display is provided, and this display unit is also connected to the system bus 25 through a display interface.

The microcomputer 20 has input / output ports 26t, 26d, 27a, 27v, 27b,
And an interface circuit 28, each of which is connected to the system bus 25.

The ports 26t and 26d are connected to the tuner circuit 11 and the decode circuit 12, respectively, and the ports 27a and 27v are connected to the audio signal processing circuit 14
And the video signal processing circuit 13 are connected to each other. The beep sound generation circuit 15 is connected to the port 27b.

A program selection signal is supplied to the tuner circuit 11 through the port 26t. In the antenna orientation adjustment mode, identification information indicating the type of satellite broadcast service described later is fetched from the tuner circuit 11 through the port 26t.

A control signal is supplied to the video signal processing circuit 13 and the audio signal processing circuit 14 through the ports 27a and 27b. In the antenna direction adjustment mode, the video signal processing circuit 13 controls the level of the antenna input from the video RAM 24. The display image is output, and the audio signal processing circuit 14 outputs a beep sound from the beep sound generation circuit 15. Then, in the normal broadcast reception mode, the video signal processing circuit 13 and the audio signal processing circuit 14 output signals obtained by subjecting the video signal and the audio signal decoded by the decoding circuit 12 to predetermined processing, respectively.

The beep sound generating circuit 15 receives a control signal from the port 27b, and is set to an operating state in the antenna direction adjustment mode. As described later, when the microcomputer 20 determines that the antenna input level has become larger than before due to the user changing the direction of the receiving antenna in the antenna direction adjustment mode, a high-pitched beep sound is generated. Occurs,
When it is determined that the antenna input level is lower than before, the microcomputer 20 controls the microcomputer 20 through the port 27b so as to generate a low-pitched beep.

A plurality of operation keys Ka... Kn are connected to the key interface circuit 28. Operation key Ka
... Kn include a key for selecting a program and a key for switching between a broadcast normal reception mode and an antenna orientation adjustment mode.

[Adjustment of Direction of Receiving Antenna] Next, FIG.
An embodiment of the method for adjusting the antenna orientation of satellite broadcasting according to the present invention will be described with reference to FIG. As described above, the satellite broadcast receiving apparatus 1 of this example
0D has an antenna orientation adjustment mode in addition to the broadcast normal reception mode. When the device 10D is set to the antenna orientation adjustment mode, the processing routine 1 shown in FIG.
00 is executed.

That is, when the receiving antenna 1 is installed, the viewer changes the azimuth angle θ and the elevation angle φ in order to adjust the direction of the receiving antenna 1 correctly.
Prior to this, for example, a predetermined operation key is pressed to select a program menu, and an antenna direction adjustment routine 100 as shown in FIG. 2 is started.

In the first step 101, the receiving antenna 1 receives a broadcast signal from any of a plurality of communication satellites, and waits for the output of the tuner circuit 11 of FIG. 1 to be taken into the CPU 21 through the port 26t. .

When a broadcast signal from any communication satellite is received, the process proceeds to the next step 102, where it is determined whether or not the received signal is a broadcast signal from a desired communication satellite. .

If it is determined in step 102 that the signal is not a broadcast signal from a desired communication satellite, step 1
03, the display of the antenna input level as in the above-described conventional example and the generation of a beep sound as described later are prohibited, and the flow returns to step 101.

By prohibiting the display of the antenna input level, even when the receiving antenna 1 captures an undesired communication satellite, there is no possibility that the viewer may mistakenly recognize that the communication satellite is the desired communication satellite as in the above-described conventional example. Absent.

The determination in step 102 is made based on the additional information packet Pi included in the signal received by the receiving antenna 1 as shown in FIG. That is, since the additional information packet Pi includes, for example, the identification information of the broadcaster as the identification information indicating the type of the satellite broadcast service, the broadcast wave received from the identification information of the broadcaster is It is determined whether or not the service is a satellite broadcasting service.

That is, the identification information is taken into the CPU 21 from the decoding circuit 12 in FIG. 1 through the port 26d. Then, as a result of the determination based on the identification information,
If it is not the intended satellite broadcasting service, in step 103, the control information corresponding to the prohibition is transmitted to the port 27v,
27a, the video and audio signal processing circuit 13,
14.

Incidentally, in digital CS broadcasting, video data, audio data and additional data are transmitted by a packet multiplexing method as shown in FIG. 3, and the additional information packet Pi contains identification information of the broadcaster. It is. The additional information has not been scrambled.

In the above step 102, if the received signal is a broadcast signal from a desired communication satellite, step 1
In step 04, as shown in FIG. 1, the antenna input level is displayed on the screen 4s of the television receiver 4 in the same numerical and bar format as in the above-described conventional example. And
A beep is generated in addition to displaying the antenna input level. Since the initial value of the antenna input level is set to, for example, zero, the beep sound is initially set to a high tone.

The display image of the antenna input level displayed in step 104 is generated as follows. That is, based on the C / N of the output signal of the tuner circuit 11 captured through the port 26t of FIG.
Calculates the antenna input level. Based on the calculated input level information, display image data of the antenna input level is generated in the video RAM 24 using the character information of the ROM 22. Then, the display data of the video RAM 24 is supplied to the video input terminal 4v of the television receiver 4 through the video signal processing circuit 13.

At the same time, control information for generating a high-pitched beep is supplied to the beep generator 15 through the port 27b. Then, a high-frequency beep signal generated by the beep generation circuit 15 is supplied to the audio input terminal 4a of the television receiver 4 through the audio signal processing circuit 14, and a beep is output from a speaker (not shown). The sound Sbp is emitted.

By listening to this beep sound Sbp, the viewer can confirm that the receiving antenna 1 has captured a desired communication satellite, and the azimuth angle θ of the receiving antenna 1 can be confirmed.
And precise adjustment of the elevation angle φ.

In the next step 105, it is determined whether or not the C / N of the received broadcast signal has increased according to the adjustment of the antenna direction. If the C / N of the received broadcast signal is increased in accordance with the adjustment of the antenna direction, the process returns to step 104, where the antenna input level is displayed and a high-pitched beep is continuously emitted.

By continuing the emission of the high-pitched beep sound, the viewer can recognize that the current antenna direction is approaching the optimum direction of the receiving antenna 1.

Further, if the C / N of the received broadcast signal does not increase after the fine adjustment of the direction of the antenna is advanced in the same direction, the processing proceeds from step 105 to step 1.
In step 06, the antenna input level is displayed, a low-frequency beep signal is generated, and a low-pitched beep is emitted.

The change in the pitch of the beep sound allows the viewer to recognize that the current antenna orientation has gone beyond the optimal orientation of the receiving antenna 1, and the direction of the orientation adjustment is reversed. .

Thereafter, the fine adjustment is advanced using the change in the pitch of the beep sound as an index, and the receiving antenna 1
Is adjusted to the optimal orientation, the antenna direction adjustment routine 100 is forcibly terminated by the viewer pressing an appropriate operation key.

In the above embodiment, the antenna input level is displayed on the screen of the television receiver only when a broadcast signal from a desired communication satellite is received.
Since the high and low beep sounds are used, even if the receiving antenna captures an undesired communication satellite, there is no possibility that the viewer may mistakenly recognize that the communication satellite is the desired communication satellite.

Further, since the increase or decrease of the antenna input level is notified by a high or low beep sound, even if the receiving antenna is installed in a place where the screen of the television receiver is difficult to see, the direction can be easily adjusted. be able to.

In the above example, the antenna direction is adjusted by using both the level display and the beep sound. However, it is possible to adjust the direction of the receiving antenna by using one of them. Of course it is good.

[0054]

As described above, according to the present invention, even when a receiving antenna captures an undesired communication satellite at the time of installing a satellite broadcasting receiving antenna, the viewer can obtain a desired communication satellite. There is no risk of being mistaken as.

When the direction of the antenna is adjusted using the beep sound, the direction can be easily adjusted even if the receiving antenna is installed in a place where the screen of the television receiver is difficult to see.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a satellite broadcast receiving apparatus according to the present invention.

FIG. 2 is a flowchart for explaining a method of installing a satellite broadcasting receiving antenna according to the present invention.

FIG. 3 is a conceptual diagram for explaining the present invention.

FIG. 4 is a conceptual diagram showing a configuration example of a conventional satellite broadcast receiving device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Receiving antenna, 2 ... Converter, 4 ... Television receiver, 4s ... Screen, 10 ... Satellite broadcast receiving apparatus, 10
D: Digital satellite broadcast receiving device, 11: Tuner circuit, 12: Decoding circuit, 13: Video signal processing circuit, 1
4: audio signal processing circuit, 20: microcomputer,
100: antenna direction adjustment routine, Sbp: beep sound, STd, STu: communication satellite, θ: azimuth angle, φ: elevation angle

Claims (6)

[Claims] 1. A satellite broadcast receiving apparatus comprising an antenna input level notifying unit for notifying a level of a signal received from a receiving antenna, wherein identification information indicating a type of satellite broadcast service is obtained from the received signal, and the identification information is obtained. A satellite broadcast receiving apparatus, comprising: a notification control unit that operates the antenna input level notification unit only when the information is for a desired satellite broadcast service. 2. The satellite broadcast receiving apparatus according to claim 1, wherein said antenna input level notifying means generates information by a plurality of kinds of sounds. 3. The satellite broadcast receiving apparatus according to claim 1, wherein said antenna input level notifying means generates image information for displaying a level on a display screen. 4. A method for adjusting the direction of the receiving antenna by notifying the level of a received signal input according to the direction of the receiving antenna when the receiving antenna for satellite broadcasting is installed. A satellite characterized in that identification information indicating a type of a satellite broadcast service is obtained from a received signal, and the level of the received signal is reported only when the identification information is of a desired satellite broadcast service. Broadcast antenna orientation adjustment method. 5. The method according to claim 4, wherein the level of the received signal is reported by a plurality of types of sounds. 6. The method according to claim 4, wherein the level of the received signal is notified by image information.