JPH0644282U - Satellite receiver - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a satellite broadcasting receiver which is easy to use in connection with a scramble decoder for pay broadcasting. [Structure] Two systems of input / output terminals for a scramble decoder for pay broadcasting are provided, and the input from each of the scramble decoders 9a and 9b and the input from the internal video processing circuit 5 and audio processing circuit 6 are received. It can be automatically switched by the switch 8 depending on whether the signal being scrambled is a scrambled signal and by which method the scrambled signal is. Further, the decoder input terminals 13a-13
f can also be used as an external input terminal by connecting to AV equipment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a satellite broadcasting receiver which is easy to use in connection with a scramble decoder for pay broadcasting.

[0002]

[Prior art]

 The satellite broadcasts currently being broadcast include broadcasts in which radio waves transmitted from ground stations are relayed through the broadcast satellites (BS broadcasts below) and broadcasts relayed through communication satellites (CS broadcasts below). There is. Some broadcasts are scrambled pay broadcasts, and to view pay broadcasts, a scramble decoder is required in addition to the satellite broadcast receiver.

FIG. 2 shows an example of a conventional satellite broadcast receiver.

The BS-IF and / or CS-IF signals that have entered the satellite broadcast receiver 1 from the input terminal 11 are converted into intermediate frequency signals after being selected by the frequency conversion circuit 2 to a desired satellite broadcast channel. The signal is detected by the AGC circuit 3 and the FM demodulation circuit 4 and converted into a baseband signal. The baseband signal is processed by the video processing circuit 5 and the audio processing circuit 6, becomes a video signal V and left and right audio signals L and R, and is supplied to the switch 8.

Further, in the video processing circuit 5 and the audio processing circuit 6, the detection signal and the bit stream signal are output to the scramble decoder 9a. The signal input to the scramble decoder 9a is descrambled, and then supplied as a video signal and a left and right audio signal from the decoder input terminals 13a, 13b, 13c of the satellite broadcast receiver 1 to the switch 8, respectively.

The switching control circuit 7 determines whether the signal being received is a scrambled signal or a non-scrambled signal, based on the signal supplied from the audio processing circuit 6. If it is a scrambled signal, the switch 8 is switched to the input side from the scramble decoder, and if it is a non-scrambled signal, the switch 8 is switched to the input side from the video processing circuit 5 and the audio processing circuit 6 in the receiver 1. . Also, the connection of the connection cord to the input terminal 13a of the video signal from the scramble decoder is discriminated, and the switch 8 is not switched to the input side from the scramble decoder when the cord is not connected to this terminal. ing. The video signal V and the left and right audio signals L and R output from the switch 8 are output from the common output terminals 14a, 14b and 14c to the external VTR 10a and the TV receiver 10b, respectively.

[0007]

[Problems to be solved by the device]

 Currently, two types of scramble systems are used for pay-per-view broadcasting that can be received individually from satellites. In order to cancel the scrambled broadcast for viewing, the scramble that matches the system is used. Decoder needed. Therefore, two scramble decoders are required to view two pay broadcasts with different scramble systems.

However, the conventional satellite broadcast receiver 1 has only one system each of which has a detection output terminal 12a for connecting a scramble decoder, a bit stream output terminal 12b, and decoder input terminals 13a, 13b, 13c. Therefore, in order to connect the two scramble decoders, as shown in FIG. 2, the detector signal and the bit stream signal output from the satellite broadcast receiver are distributed by the distributors 16a and 16b, respectively. After that, the data is input to the two scramble decoders 9a and 9b. Then, it is necessary to input the signals of the two systems released and output by the scramble decoders 9a and 9b to the satellite broadcast receiver 1 after switching them by an external switch 17 or a human hand. As described above, the conventional satellite broadcast receiver 1 is not easy to use in order to view pay broadcasts of different systems.

The problem to be solved by the present invention is how to make a satellite broadcasting receiver which is easy to connect a plurality of scramble decoders and is easy to use even when watching pay broadcasting of different systems. There is a point that should be taken.

[0010]

[Means for Solving the Problems]

 Therefore, in order to solve the above problems, the present invention provides

In a satellite broadcasting receiver that receives satellite broadcasting and outputs a detection signal and a bit stream signal,

At least two systems of detection output terminals, bit stream output terminals and decoder input terminals for connecting the scramble decoder,

A switching circuit for switching and outputting a video signal and an audio signal input from the decoder input terminal and a video signal and an audio signal input from the video processing circuit and the audio processing circuit in the satellite broadcast receiver,

A control circuit for controlling switching of the switching circuit;

An output terminal for outputting the switched signal is provided,

The control circuit is

When the scramble decoder is connected, switching control is performed according to whether or not the satellite broadcast signal being received is a scramble signal and which method of the scramble signal.

When a device other than the scramble decoder is connected to the decoder input terminal, switching control is performed according to a switching signal from the outside to provide a satellite broadcasting receiver. .

[0019]

【Example】

 FIG. 1 shows an embodiment of the present invention. The same parts as those of the conventional example are designated by the same reference numerals.

Similar to the conventional example, the BS-IF and / or CS-IF signals input to the satellite broadcast receiver 1a are selected by the frequency conversion circuit 2 to the desired satellite broadcast channel, The signal is converted into an intermediate frequency signal, detected by the FM demodulation circuit 4, and output. This signal is processed by the video processing circuit 5 and the audio processing circuit 6, becomes a video signal V and left and right audio signals L and R, and is supplied to the switch 8. Further, the video processing circuit 5 and the audio processing circuit 6 output two systems of the detection signal and the bit stream signal. The output of one system is supplied from the detection output terminal 12a and the bit stream output terminal 12b to the scramble decoder 9a, and the other output is supplied from the detection output terminal 12c and the bit stream output terminal 12d to the scramble decoder 9b. The supplied signals are descrambled by scrambling decoders of different scrambling methods, and then, as video signals and left and right audio signals, decoder input terminals 13a, 13b, 13c of the satellite broadcast receiver 1a or decoders. It is supplied to the switch 8 via the input terminals 13d, 13e, 13f, respectively.

When connecting the scramble decoder to the decoder input terminals 13a to 13f, the switch button 15 is set to the position of “scramble decoder”. In this setting, the switching control circuit 18 determines the scramble data included in the control bit and range bit signals sent from the audio processing circuit 6 according to the broadcast being received at that time. If the signal being received is a non-scrambled signal, the switch 8 is switched to the input side from the video processing circuit 5 and the audio processing circuit 6, and if it is a scrambled signal, the same scramble decoding as that of the scramble system is performed. The switch 8 is switched to the input side from the switch. Further, the switching control circuit 18 determines the connection from the respective scramble decoders 9a, 9b to the video input terminals 13a, 13d, and if they are not connected, the switch 8 is provided on the input side from the scramble decoder. It is controlled so that it does not switch.

On the other hand, when connecting not the scramble decoder but the AV devices 18a and 18b to the decoder input terminals 13a to 13f, the switching button 15 is switched to the position of "external input 1" or "external input 2". By this setting, the switch 8 is forcibly switched to the input side from the decoder input terminals 13a, 13b, 13c when "external input 1" is specified, and the decoder input terminals 13d, 13e when "external input 2" is specified. , 13f, the switch 8 is forcibly switched to the input side.

As described above, the satellite broadcast receiver can also function as a selector for two systems of external AV equipment.

Further, when the satellite broadcasting receiver 1a is turned off and the switch button 15 is in the position of "external input 1", the switch 8 is switched to the decoder input terminals 13a to 13c side. Therefore, the signals from the decoder input terminals 13a to 13c are forcibly output from the common output terminals 14a to 14c. Similarly, when the switching button 15 is in the position of "external input 2", the switch 8 is switched to the decoder input terminals 13d to 13f side, and the signals from the decoder input terminals 13d to 13f are forced to be forced. It is output from the common output terminals 14a to 14c. Therefore, the signal of the AV device connected to the decoder input terminal can be viewed on the TV receiver 10b without turning on the satellite broadcasting receiver 1a.

Although the two systems of scramble decoders can be connected in the present embodiment, it is of course possible to increase the number of terminals and connect three or more systems of scramble decoders.

[0026]

[Effect of device]

 As described above, the satellite broadcast receiver according to the present invention can be connected to at least two scramble decoders, and determines whether the satellite broadcast signal being received is a scramble signal and which scramble signal is used. Accordingly, it can automatically output the optimum signal and is extremely convenient when receiving pay broadcasts of two or more systems.

Furthermore, when a scramble decoder is not connected to the decoder input terminal, it can be used as a selector for at least two systems by connecting an AV device or the like to the terminal, which has a wide range of applications.

[Brief description of drawings]

FIG. 1 is a diagram showing an example.

FIG. 2 is a diagram showing a conventional example.

[Explanation of symbols]

1a satellite broadcast receiver 2 frequency conversion circuit 3 AGC circuit 4 FM demodulation circuit 5 video processing circuit 6 audio processing circuit 8 switch 9a, 9b scramble decoder 11 BS-IF, CS-IF signal input terminal 12a, 12c detection output terminal 12b, 12d bit stream output terminal 13a, 13b, 13c, 13d, 13e, 13f decoder input terminal 14a, 14b, 14c common output terminal 15 switching button 18 switching control circuit

Claims (1)

[Scope of utility model registration request] 1. A satellite broadcast receiver for receiving a satellite broadcast and outputting a detection signal and a bitstream signal, wherein at least two for connecting a scramble decoder.
System detection output terminal, bit stream output terminal and decoder input terminal, video signal and audio signal input from the decoder input terminal, video signal and audio signal input from video processing circuit and audio processing circuit in the satellite broadcast receiver And a control circuit for controlling the switching of the switching circuit, and an output terminal for outputting the switched signal. The control circuit, when the scramble decoder is connected, , Whether the satellite broadcast signal being received is a scrambled signal,
In addition, switching control is performed according to which type of scramble signal, and when a device other than the scramble decoder is connected to the decoder input terminal, switching control is performed according to a switching signal from the outside. Characteristic satellite broadcasting receiver.