JP2577432Y2 - Satellite receiver - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite receiver for automatically silencing or reducing sound output when receiving a scrambled satellite broadcast.

[0002]

2. Description of the Related Art Various information services using satellites include a television broadcast currently using a broadcasting satellite (BS). In television broadcasting, operation of private broadcasting has begun in addition to NHK broadcasting programs. However, in the case of a private broadcasting station, it will be a scrambled (confidential) broadcast that assumes paid reception based on an individual reception contract. Therefore, if a descrambler (scramble decoder) lent or purchased with a paid contract is not connected, reception will be performed I can't. The satellite receiver shown in FIG. 7 receives a radio wave by a satellite antenna, controls a tuning and demodulation unit 1 by a microcomputer unit 6, processes a demodulated signal D by a video processing unit 2 and an audio processing unit 3, and outputs a video signal. V1 and audio outputs L1 and R1.

[0003]

[Problems to be Solved by the Invention] If a scrambled broadcast is selected and received when a pay contract is not made and a scramble decoder is not connected, the scramble state is not released, and therefore, the video output V1 is not displayed. Are output in a spread state, and the audio outputs L1 and R1 are also output in a spread state. In particular, there has been a problem that the sound outputs L1 and R1 become noise sounds in the sense of hearing and are unpleasant. Also, Japanese Unexamined Patent Publication (Kokai) No. 3-117993, "Paid broadcast
Switch the receiving channel during pay broadcast reception
Output until descrambling is performed normally
A pay broadcast receiving apparatus that mutes the
ing. However, this receiver does not
After the change, the sound continues until the fixed time set in the timer elapses.
Voice mute, voice mute
The only prerequisite is the fact that the pay broadcast was selected.
The mute period exceeds the initialization period of the cryptographic generator.
It is only the time set by the timer set in between.
Was. Therefore, for some reason, the initialization time of the
If the time set for the timer is exceeded, the timer
The audio mute is released when the set time of
Unpleasant noise is not silenced until the livelihood is initialized
However, there is a problem that the information is output to a computer. Ma
To avoid such mute failure, set the timer
If the time is set long enough, the
It is scheduled to be able to receive paid broadcasts
Regardless, the audio mute continues to be applied
I want to watch the switched channel as soon as possible
Issues such as not being able to meet the demands of the desired users
It was something to have. Also, Japanese Patent Application Laid-Open No. 2-279082
No. “Data receiver” is specified in the audio format.
Scrambled data superimposed on the independent data part
Data SDA and extract the scrambled data SDA
A television that takes a signal processing form according to the content
A broadcast receiving device is disclosed. However, this
The receiving device is operated by a user such as a switch switching operation.
No, scrambled broadcast is descrambled and transmitted
Non-scrambled broadcasts are transmitted without descrambling
Of the signal processing form
The choice of signal processing form is
It was clear that it did not extend to sew processing. You
That is, a scrambled broadcast is output without descrambling.
Countermeasures against unpleasant output sound due to force
Does not take into account the fine dust, just release the scramble
Option to output without descrambling the transmission
There is no need for audio mute measures just because there is no
It was nothing more.

[0004] Therefore, an object of the present invention is to provide a user with an audio output that becomes noise when receiving a scrambled broadcast.
It is an object of the present invention to provide a satellite receiving apparatus that performs appropriate silencing or sound reduction according to the selection of television sound or independent sound .

[0005]

SUMMARY OF THE INVENTION Accordingly, in order to achieve the above object, the present invention provides a tuning demodulator for receiving and selecting and demodulating a satellite broadcast, and a modulated signal included in an output of the tuning demodulator. demodulated to extract the audio signal, and a voice processing unit for outputting an audio signal, TV / Germany for switching and selecting the independent audio and television sound
Standing sound selecting means, and the scrambler for selecting TV sound.
Of scrambled bits related to TV audio
Only when the audio signal indicates that scramble processing has been performed.
Mute or reduce the sound output from the processing unit, and
When the option is selected, the
If the scramble bit indicates that scramble processing has been performed,
Only in this case, there is provided a sound output control means for muting or reducing the sound output from the sound processing unit. Further , the present invention provides a tuning demodulator for receiving and selecting and demodulating a satellite broadcast, and a voice processing for extracting and demodulating a modulated voice signal included in an output of the tuning demodulator and outputting a voice signal. And a scramble bit indicating the presence or absence of a scramble process detected in the process of the audio processing unit is supplied and determined, and when the scramble bit indicates that only one of the television sound and the independent sound indicates the presence of the scramble process, And an audio output control means for switching the audio output from the audio processing unit to the non-scrambled television audio or independent audio and outputting the same.

[0006]

The present invention works to mute or reduce noise in the audio output when the satellite receiver receives a scrambled broadcast, and solves problems such as unpleasantness in hearing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing an example of a satellite receiving apparatus . FIG.
Rather than a receiver, it has a rough audio mute function
It is. The audio processing unit 3 of the satellite receiver shown in FIG.
A voice modulated wave is extracted from the demodulated signal D by the 5.73 MHz BPF 31, input to the four-phase PSK demodulation circuit 32, demodulated, PCM processed by the PCM decoder / digital voice processing circuit 33, and voice output L1 from the voice processing circuit 34. , R1 are output. A signal is supplied from the PCM decoder / digital audio processing circuit 33 to the scramble bit determination section 5, and the scramble bit determination section 5
Take out 2, 3, and 4 scramble bit information. The scramble bit discriminating section 5 discriminates and detects scramble information in the PCM signal. In the case of BS, there are four channels of audio,
3, 4 scrambled bits are detected. Audios 1 and 2 are television audios, and audios 3 and 4 are independent audio information.

When the scrambled bit is set to "H" at the time of scrambled broadcasting, a logical sum (OR) circuit 7 performs a logical operation on the scrambled bit, and the PCM decoder / digital audio processing circuit 33 uses the audio output control information A. To mute or reduce sound output. That is, when either one of the television audios 1 and 2 or the independent audio information 3 and 4 has a scramble bit of “H”, the audio output control information A
Becomes "H", and the sound output in the PCM decoder / digital sound processing circuit 33 is muted. As a result, the audio circuit 34 does not output the audio outputs L1 and R1 of only the noise sound.

FIG. 2 is a block diagram showing a first embodiment of the satellite receiver of the present invention. The audio processing unit 3 of the satellite receiver shown in the figure performs audio output control at the time of scrambled broadcast reception according to the audio output selection state.
In the case of a broadcast satellite (BS), there are four channels of audio,
TV / independent audio switching is performed as audio selection, and each channel (L, R) can be selected. In the case of the present embodiment, when the TV audio is selected in the audio selection state, for example, when the TV audio is scrambled or not, the audio output control is performed according to each selected state and the scrambled state. Shown to audio output controller 8 in FIG. 2 is configured as shown in FIG. 3, TV / independent audio switching signal C (TV sound when: L, when independent voice: H) and the scrambling bit determination of 2 The audio output is controlled by calculation with the scramble bits of the audio 1, 2, 3 and 4 obtained from the section 5. The sound output control information A is to mute or reduce sound at “H”.

In FIG. 3, for example, in the case of television audio, if the audios 1 and 2 are scrambled broadcasts, the output becomes H by the OR circuit OR1 and the logical product circuit AND1 outputs "L" indicating the television audio state. And the output "H" of the OR circuit OR1 is input, and "H" is input as an output to the OR circuit OR3. OR circuit O
Regarding the other input of R3, "H" is output as the audio output control information A as the output of the OR circuit OR3 regardless of whether or not the audios 3 and 4 have a scrambled broadcast, so that the sound can be muted or reduced. .

FIG. 4 is a block diagram showing a second embodiment of the satellite receiver according to the present invention. The audio processing unit 3 of the satellite receiver shown in FIG. 2 performs the audio output control described in the first embodiment by software processing.
The microcomputer section 6 outputs a television / independent sound switching signal C to the PCM decoder / digital sound processing circuit 33 by the sound selection control signal E. The scrambled bits detected by the scrambled bit discriminating unit 5 are logically operated on the audio signals 1 and 2 by the OR circuit OR1 and are also logically operated on the audio signals 3 and 4 by the OR circuit OR2. The independent voice bit B2 is extracted and input to the microcomputer unit 6. Since the microcomputer unit 6 recognizes the current television / independent audio selection state, the microcomputer unit 6 outputs the audio output control information A by calculating the television audio bit B1 for television audio and the independent audio bit B2 for independent audio. .

FIG. 5 shows an operation flowchart of the microcomputer section 6. In step 11, the television / independent audio switching signal C is determined. For example, if the signal is television audio, the television audio bit B1 is determined in the processing in step 12, and B1 = H
Then, if the audio output control information A = H, B1 = L, A = L
And On the other hand, if it is determined in step 11 that the voice is an independent voice,
If the independent audio bit B2 = H, the audio output control information A =
If H, B2 = L, A = L. For this reason, the audio output from the audio processing unit 3 is muted or reduced only when the scramble bit related to the television audio among the scramble bits indicates that the scramble processing is performed when the television audio is selected. Only when the scramble bit relating to the independent sound indicates that the scramble processing is performed, the sound output from the sound processing unit 3 can be muted or reduced. In other words, if only the TV sound is scrambled, the independent sound that has not been scrambled is not muted or reduced, and the scramble processing is also performed only on the independent sound. In this case, there is no possibility to mute or reduce the sound of the television sound that has not been subjected to the scramble processing.

FIG. 6 is a flowchart for explaining the operation of the third embodiment of the satellite receiver of the present invention. In the third embodiment, in the audio processing unit 3 of the satellite receiver shown in FIG. 4, the TV / independent audio selection state in the microcomputer unit 6 and the television audio bit B1 and the independent audio bit B2 do not automatically perform scramble broadcasting. This is to switch to an audio channel. If the independent audio side is not a scrambled broadcast when the scrambled broadcast starts at the time of selecting the TV audio, it is automatically switched to the independent audio side,
If the independent audio side is also performing scramble broadcasting, the audio output is muted or reduced. In Furochi <br/> chart shown in the figure, it determines the TV / independent audio switching signal C in step 20, when the television audio in step 21,
If the television audio bit B1 is "L", the audio output control information A = "L" and the television audio state is maintained.
If "= H", if the independent voice bit B2 = "L" in step 22, the independent voice is not scrambled, so that C = "H" and A = L are switched to the independent voice side. , B2 = “H”, then A
= “H” to mute or reduce sound. When using independent sound,
Switching is performed by steps 23 and 24, and television sound switching, mute or sound reduction is performed. Therefore, when a scrambled satellite broadcast is received, the non-scrambled audio of the television sound or the independent audio can be automatically and selectively output, and the scrambled broadcast can be output. The user's response burden can be reduced with the most appropriate choice according to the situation.

[0014]

[Effects of the Invention] As described above, according to the present invention ,
It is possible to switch and select between TV sound and independent sound, and at the time of TV sound selection, mute or reduce sound output from the sound processing unit only when the scramble bit related to TV sound among the scramble bits indicates that scramble processing is performed. When the independent voice is selected, only when the scramble bit related to the independent voice among the scramble bits indicates that the scramble process is performed, the voice output from the voice processing unit is muted or reduced.
When the scramble processing is performed only on the TV sound, the independent sound that has not been subjected to the scramble processing is not muted or reduced, and the scramble processing is similarly performed only on the independent sound. In this case, there is no need to mute or reduce even the sound of the television sound that has not been subjected to the scramble processing, and it is possible to provide an excellent effect such that a fine-grained response corresponding to the actual state of the scramble processing is possible. Play. Still further, according to the present invention, when only the scramble bit indicates that the television audio or the independent audio is scrambled, the audio output from the audio processing unit is output to the non-scrambled television audio or the independent audio. So that when it receives a scrambled satellite broadcast,
It is possible to automatically and selectively output the audio of the television audio or the independent audio that has not been subjected to scramble processing, and reduce the user's burden of responding to scrambled broadcasting with the most appropriate selection according to the situation. It has effects such as being able to do.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a satellite receiver .

FIG. 2 is a block diagram showing a first embodiment of the satellite receiver according to the present invention;

FIG. 3 is a block diagram illustrating a detailed configuration of an audio output control unit illustrated in FIG. 2;

FIG. 4 is a block diagram showing a second embodiment of the satellite receiver according to the present invention;

FIG. 5 is a flowchart for explaining the operation of the microcomputer unit shown in FIG. 4;

FIG. 6 is a flowchart for explaining the operation of the third embodiment of the satellite receiver of the present invention.

FIG. 7 is a block diagram illustrating an example of a conventional satellite receiver.

[Explanation of symbols]

 Reference Signs List 3 audio processing unit 33 PCM decoder / digital audio processing circuit 5 scramble bit discrimination unit 6 microcomputer unit 7 OR circuit 8 audio output control unit

Claims (2)

(57) [Scope of request for utility model registration] 1. A tuning demodulation unit for receiving and selecting and demodulating a satellite broadcast, and a speech processing unit for extracting and demodulating a modulated speech signal included in an output of the tuning demodulation unit and outputting a speech signal. When,
TV / independent audio to select and switch between TV audio and independent audio
Selection means, and the scramble
Scrambled bits related to TV audio
Only when it indicates that there is a crumble process, the audio processing unit
Mute or reduce the sound output from the
Is the scrambled bit for the independent voice.
When the rumble bit indicates that scramble processing is
See, Mamoruhoshi receiving apparatus characterized by comprising an audio output control means for silencing or noise reducing audio output from the audio processing unit. 2. A channel recovery unit that receives a satellite broadcast and performs channel selection demodulation.
Tuning section and a modulated audio signal included in the output of the channel selection demodulation section
An audio processing unit that extracts and demodulates and outputs an audio signal;
Scramble processing detected in the processing of the audio processing unit
Is determined by being supplied with a scramble bit indicating the presence or absence of
The scrambled bit is either TV audio or independent audio
Only indicates that there is scrambling,
The audio output from the control unit is not scrambled.
Switch to the other TV sound or independent sound and output
A satellite receiver comprising: a voice output control unit .