JPH07250044A - Satellite tuner - Google Patents

Abstract

PURPOSE:To cancel the scrambled signal supplied from the outside by the unused one of both scramble decoders of a satellite tuner. CONSTITUTION:The scrambled signal received from a detection part 3 is sent to the corresponding scramble decoder 4, and another scrambled signal inputted to an external terminal is sent to a scramble decoder 5. The output of the decoder 4 is used as the output signal of a satellite tuner 10, and the output of the decoder 5 is connected to an output terminal 6 and used as a descramble signal to an external signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite tuner, and more particularly to releasing a scrambled signal from the outside and outputting it to the outside.

[0002]

2. Description of the Related Art Recently, broadcasting satellite (BS), communication satellite (S)
Reception of television broadcasting from CC, JC-SAT, etc. has become common. To receive these radio waves, a satellite tuner is required, and if the transmitted waves are scrambled, a scramble decoder (circuit for canceling the scrambled signal) is required. BS, JCS
The scrambled signal of the transmission wave distributed by the AT is of the core tech system, and the SCC is of the skyport system. For this reason, the CS / BS satellite tuner has two types of scramble decoders for canceling both types of scrambled signals, but when one scramble decoder is operating, the other scramble decoder is not used. . For example, when one person receives a BS broadcast by a satellite tuner and uses a scrambled signal of the core tech system after descrambling it with the same scramble decoder, another person cannot cancel the scrambled signal. There is no satellite tuner that can perform such operations even if you want to connect this signal to the satellite tuner and cancel it with a scramble decoder that is not used by the satellite tuner when you receive SCC broadcast on the / CS television receiver. there were.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art. The scramble decoder which is not used in the satellite tuner is used to cancel the scrambled signal from the outside. The purpose is to do.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a satellite tuner for receiving satellite broadcasting / communication satellites, a detector for detecting the received radio wave, and a different scramble from the detector. A first scramble decoder and a second scramble decoder for releasing the applied signal, an input section for selecting one of the scrambled signals, and an input and descrambled scrambled signal detected from the outside. Provided is a satellite tuner including an input / output terminal for outputting a squeezed signal, a relay for switching the signal, a drive unit for driving the relay, and a control unit for controlling the input unit and the drive unit. .

[0005]

According to the above construction, the output signal of the detection section is connected to the scramble decoder corresponding to the scramble system of the same signal, and the scrambled signal inputted to the external terminal is connected to the other scramble decoder. By connecting the output signal of the latter scramble decoder to the output terminal, the scramble decoder which is not used in the satellite tuner is used as the release of the scrambled signal from the outside.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, 1a is a first input terminal,
The received signal from the antenna is connected. 2 is a second converter, which converts the input radio wave into the second intermediate frequency. A detector 3 detects the output signal of the second converter 2. Reference numeral 4 is a first scramble decoder, and 5 is a second scramble decoder (a circuit for canceling a scrambled signal), which cancels two kinds of different scrambled signals output from the detection unit 3 by either decoder. To do. An input unit 13 selects which of the two types of scrambled signals from the detection unit 3 to be released. 1b is a second input terminal to which a scrambled signal detected by an external tuner is input.
Video / audio output terminals 6a and 6b are terminals for outputting the signals released by the first scramble decoder 4 or the second scramble decoder 5 to the outside. 7a, 7
Reference numerals b, 7c, 7d, 7e and 7f are relays for switching signals from the respective parts. A drive unit 8 drives the relay 7.
A control unit 9 controls the input unit 13 and the drive unit 8.

Further, the connection of each part is as follows. Input section
13 is connected to the control unit 9, and the control unit 9 is connected to the drive unit 8. The drive unit 8 is connected to each relay 7. Second
The input terminal 1b is connected to the second terminals of the relays 7a and 7b, and the detection unit 3 is connected to the first terminals of the relays 7a and 7b. The movable terminal of the relay 7a is connected to the input of the first scramble decoder 4, and the movable terminal of the relay 7b is connected to the input of the second scramble decoder 5. The video output of the first scramble decoder 4 is connected to the first terminal of the relay 7c and the second terminal of the relay 7e. The audio output of the first scramble decoder 4 is connected to the first terminal of the relay 7d, and the relay 7f
Connected to the second terminal of the. Second scramble decoder 5
The video output of is connected to the second terminal of the relay 7c and the first terminal of the relay 7e. The audio output of the second scramble decoder 5 is connected to the second terminal of the relay 7d and the first terminal of the relay 7f. On the other hand, a video signal for the satellite tuner is taken out from the movable terminal of the relay 7c, and an audio signal for the satellite tuner is taken out from the movable terminal of the relay 7d. The movable terminal of the relay 7e is connected to the video output terminal 6a, and the movable terminal of the relay 7f is connected to the audio output terminal 6b.

In the above configuration, the satellite tuner 1
If the user wants to receive BS broadcast at 0, the satellite name "BS" and channel "NO5" are input from the input unit 13. Then, the S11 channel of the SCC broadcast is selected by the external tuner. At this time, the detected signal of the S11 channel is input to the second input terminal 1b. Based on this, the control unit 9 causes the drive unit 8 to switch the relay 7 as follows. That is, the movable terminal of the relay 7a is the first terminal, the movable terminal of the relay 7b is the second terminal, the movable terminal of the relay 7c is the first terminal, and the movable terminal of the relay 7d is the first terminal.
The movable terminal of the relay 7e is switched to the first terminal, and the movable terminal of the relay 7f is switched to the first terminal. As a result, the core-tech type scrambled signal output from the detection unit 3 is input to the first scramble decoder 4 via the relay 7a and is released. Then, the released video signal is output via the relay 7c to be the output signal of the satellite tuner, and the audio signal is output via the relay 7d to be the output signal of the satellite tuner. On the other hand, input terminal 5
The S11 channel skyport scrambled signal input to is input to the second scramble decoder 5 via the relay 7b, and the scrambled signal is released. The released video signal is output to the output terminal 6a via the relay 7e, and the audio signal is output to the output terminal 6b via the relay 7f.

Similarly, when the output signal of the detector 3 is the sky port system and the signal input to the second input terminal 1b is the core tech system, the control unit 9 causes the drive unit 8 to relay the relay 7
Is switched to a terminal different from the above, two different scrambled signals are released in the same manner as above, and the signals are output to the respective terminals.

In another embodiment, as shown in FIG. 2, input terminals 11a and 11b for inputting two different detection signals from an external tuner are provided. The input terminal 11a is connected to the second terminal of the relay 7a, and the input terminal 11b is connected to the second terminal of the relay 7b. On the other hand, the detection unit 3
Is connected to the first terminals of the relays 7a and 7b,
Is connected to the input of the first scramble decoder 4, and the movable terminal of the relay 7b is connected to the input of the second scramble decoder 5. First scramble decoder 4
The video output of is connected to the video terminal 12a and the first terminal of the relay 7g, and the audio output is connected to the audio terminal 12b and the first terminal of the relay 7h. The video output of the second scramble decoder 5 is the second output of the video terminal 6a and the relay 7g.
The audio output is connected to the audio terminal 6b and the second terminal of the relay 7h.

In the satellite tuner 10, for example, BS
To receive a broadcast, input "BS" and channel "NO5" from the input unit 13. And the input terminal 11
For example, a core-tech system scrambled signal is connected to a, and a skyport system scrambled signal is connected to the input terminal 11b. Therefore, if the S11 channel of the SCC broadcast is selected by the external tuner, the detected skyport scrambled signal of the S11 channel is input to the input terminal 11b.
Based on this, the control unit 9 causes the drive unit 8 to switch the relay 7 as follows. That is, the movable terminal of the relay 7a is switched to the first terminal, the movable terminal of the relay 7b is switched to the second terminal, the movable terminal of the relay 7g is switched to the first terminal, and the movable terminal of the relay 7h is switched to the first terminal. The core-tech type scrambled signal output from the detection unit 3 is input to the first scramble decoder 4 via the relay 7a,
The scrambled signal is released. The released video signal is output via the relay 7g, and the audio signal is output via the relay 7h. On the other hand, the input terminal 11b
The S11 channel skyport scrambled signal input to is input to the second scramble decoder 5 via the relay 7b, the scrambled signal is released, and the video signal is output to the output terminal 6a and the audio signal is output. The signal is output to the output terminal 6b.

Next, when "SCC" and channel "S11" are input from the input section 4 and the BS tuner 5 channel is selected by the external tuner, the control section 9 causes the drive section 8 to switch the relay 7. That is, the movable terminal of the relay 7a is switched to the second terminal, the movable terminal of the relay 7b is switched to the first terminal, the movable terminal of the relay 7g is switched to the second terminal, and the movable terminal of the relay 7h is switched to the second terminal. The skyport-type scrambled signal is output from the detection unit 3 and input to the second scramble decoder 5 via the relay 7a, and the scrambled signal is released. The released video signal is output via the relay 7g, and the audio signal is output via the relay 7h. On the other hand, input terminal 1
The BS5-channel core-tech scrambled signal input to 1a is input to the first scramble decoder 4 via the relay 7a, the scrambled signal is released, and the video signal is output to the output terminal 12a and the audio signal is output. The signal is output to the output terminal 12b.

[0013]

As described above, in the present invention, when one of the scramble decoders of the satellite tuner having the two-system scramble decoder is used, the other scramble decoder cancels the externally scrambled signal. Therefore, the satellite tuner can be effectively used.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a satellite tuner of the present invention.

FIG. 2 is a block diagram showing another embodiment of the satellite tuner of the present invention.

[Explanation of symbols]

 1a 1st input terminal 1b 2nd input terminal 2 2nd converter 3 Detection section 4 1st scramble decoder 5 2nd scramble decoder 6 Output terminal 7 Relay 8 Drive section 9 Control section 10 Satellite tuner 11 Input terminal 12 Output terminal 13 Input section

Claims (3)

[Claims] 1. A satellite tuner for receiving a satellite broadcasting / communication satellite, wherein a detector for detecting a received radio wave, and a first scramble decoder and a second scramble decoder for canceling different scrambled signals from the detector. , An input section for selecting the scrambled signal to be released, an input / output terminal for inputting the scrambled signal detected from the outside and an output for the scrambled signal to be released, and a relay for switching the signal A satellite tuner including a drive unit for driving the relay and a control unit for controlling the input unit and the drive unit. 2. The first scramble decoder or the second scramble decoder cancels the scrambled signal from the detection unit, and the scramble decoder not used cancels the scrambled signal from the outside. The satellite tuner according to claim 1, wherein the satellite tuner is output to the outside. 3. Two sets of the input / output terminals are provided, and two different types of scrambled signals are connected to the respective input terminals, and the released scrambled signals are output to the outside from the respective input terminals. The satellite tuner according to claim 1, characterized in that: