JPH0759079A - Broadcast receiver - Google Patents

Abstract

PURPOSE:To prevent a viewer from having an incredible sense by selecting automatically broadcast channels before and after a selected channel while an identification code read by a read means indicates a non-broadcast channel. CONSTITUTION:A microcomputer 13 reads a control code detected by a control code detection circuit 25 to discriminate whether a 7th bit indicates a television broadcast channel or a television non-broadcast channel. When it is discriminated that the 7th bit indicates the television non-broadcast channel, a computer 13 increments a channel selected at present by 1 or decrements it by 1. Thus, a 2nd converter 12 is controlled to select channels before or after the channel selected at present thereby allowing automatic channel skip. Thus, trial viewing of the channel is prevented and it is prevented that the viewer has an incredible sense.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast receiver for receiving television broadcasts using communication satellites, for example.

[0002]

2. Description of the Related Art As is well known, a television broadcast signal transmitted from a satellite is frequency-converted by a satellite broadcast antenna installed outdoors, and then a satellite broadcast installed indoors via a coaxial cable. Input to the receiver. In a satellite broadcast receiver, an input television signal is subjected to various signal processing such as amplification and demodulation to generate an image signal and an audio signal. The image signal and the audio signal generated by the satellite broadcast receiver are output to a television receiver for image display and audio reproduction.

By the way, in the case of television broadcasting by a communication satellite, a channel for television broadcasting and a channel for communication are mixed in many channels. For this reason, in a satellite broadcast receiver intended to receive a television broadcast from a communication satellite, when the communication channel is selected, the screen is automatically blacked out and the sound is muted, so that the communication content is Measures have been taken to prevent eavesdroppers from being intercepted.

That is, each channel of the communication satellite is
A 16-bit control code is added together with the information signal, and the 7th bit (hereinafter bit) of this control code is added.
7) is a broadcasting / non-broadcasting identification bit indicating a television broadcasting channel or a television non-broadcasting channel (communication channel). Therefore, the satellite broadcasting receiver checks bit 7 of the selected channel, and if the channel is a television non-broadcasting channel, the screen is automatically blacked out and the sound is muted.

However, in the conventional satellite broadcast receiver as described above, when the television non-broadcast channel is selected, the screen is automatically blacked out and the audio is muted. On the other hand, the situation in which neither the image nor the sound is produced continues, which causes a problem of being very unfriendly. Further, as soon as the viewer tunes in to a certain channel, there is no image or sound, which may cause an erroneous determination as to whether or not there is a malfunction.

[0006]

As described above, in the conventional satellite broadcast receiver, when the television non-broadcast channel is selected, neither the image nor the sound is produced.
There is a problem that it is very unfriendly to the viewer and also causes an erroneous decision as to whether or not it is a malfunction.

Therefore, the present invention has been made in view of the above circumstances, and when a television non-broadcast channel is selected, the channel is prevented from being viewed and the viewer feels distrust. It is an object of the present invention to provide an extremely good broadcast receiving device that does not cause it.

[0008]

A broadcast receiving apparatus according to the present invention is intended for receiving and selecting broadcast signals of a plurality of channels including broadcast and non-broadcast. Then, an identification code which is added to each of the plurality of channels and which indicates whether the channel is a broadcast channel or a non-broadcast channel is read from the selected channel, and the identification code read by the reading means is In a state where a non-broadcast channel is shown, a control means for automatically selecting a broadcast channel before or after the selected channel is provided.

Further, in the broadcast receiving apparatus according to the present invention, in the state where the identification code read by the reading means indicates a non-broadcast channel, the broadcast selected before the selected channel is broadcast. The control means for automatically selecting a channel is provided.

[0010]

According to the above-mentioned structure, in the state where the identification code indicating whether the selected channel is the broadcast channel or the non-broadcast channel indicates the non-broadcast channel, the channel before the selected channel or A television non-broadcast channel is selected because the latter broadcast channel is automatically selected, or the broadcast channel that was selected before the selected channel is automatically selected. In this case, it is possible to prevent the channel from being viewed and prevent the viewer from feeling distrustful.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1, reference numeral 11 is an input terminal, to which a plurality of channels of television signals, which are received by a satellite broadcasting antenna (not shown) installed outdoors and converted to an intermediate frequency, are supplied. Input terminal 1
The multi-channel television signals supplied to 1 are
The channel is selected by the 2nd converter 12.

The tuning operation of the 2nd converter 12 is controlled by the microcomputer 13 and is realized by extracting the frequency band corresponding to the selected channel. When the viewer operates the up / down type tuning key or the direct tuning key of the keyboard 14 to input the information of tuning operation of a desired channel, the microcomputer 13 receives the 2nd signal.
The converter 12 is controlled.

The television signal selected by the 2nd converter 12 is supplied to an FM demodulation circuit 15 for frequency demodulation, and then an image signal is passed through a de-emphasis circuit 16, a dispersal removal circuit 17 and an image amplification circuit 18. Is converted into the output terminal 19 and taken out from the output terminal 19. Also, F
The television signal frequency-demodulated by the M demodulation circuit 15 is phase-demodulated by the QPSK demodulation circuit 20, PCM-demodulated by the PCM demodulation circuit 21, and then supplied to the D / A (digital / analog) converter 22 and L ( Left) and R
It is converted into a (right) audio signal and taken out from the output terminals 23 and 24.

Here, from the PCM demodulation circuit 21,
The control code detection circuit 25 can detect the control code described above. The control code detected by the control code detection circuit 25 is supplied to the microcomputer 13 and bi
By reading t7, it is determined whether the currently selected channel is a television broadcasting channel or a television non-broadcasting channel. When the microcomputer 13 determines that the channel is a television non-broadcast channel, it controls the 2nd converter 12 to automatically change the selected channel.

FIG. 2 is a flow chart showing an example of the operation of the microcomputer 13 during the tuning operation. First, the microcomputer 13 executes step S1.
Then, the user operates the keyboard 14 to determine whether or not the key input for selecting the desired channel has been made. When the key input for the channel selection has been made (YES), the step In S2, the 2nd converter 12 is controlled so as to extract the frequency band corresponding to the selected channel.

Next, in step S3, the microcomputer 13 reads the control code detected by the control code detection circuit 25, and in step S4, whether bit7 indicates a television broadcasting channel or a television non-broadcasting channel. If it is determined that bit7 indicates a television broadcast channel (broadcast), the process returns to step S1.

If it is determined in step S4 that bit7 indicates a television non-broadcast channel (non-broadcast), the microcomputer 13 determines in step S4.
In step 5, change the currently selected channel to +1 or -1.
Then, the process returns to step S2. As a result, the 2nd converter 12 is controlled so as to select the channel after or before the currently selected channel, and the channel skip is automatically performed.

Therefore, according to the configuration of the above embodiment, when the selected channel is a television non-broadcast channel, the channel is automatically changed to the channel after or before the currently selected channel. Since the channel is skipped, it is possible to prevent the channel from being viewed and prevent the viewer from feeling distrustful. Whether the channel is incremented by +1 or -1 in step S5 is, for example, in the case of up / down type channel selection, +1 is selected when the up key is operated and the result channel is skipped. If it is done, it should be set to -1.

FIG. 3 is a flow chart showing another example of the operation of the microcomputer 13 during the tuning operation. First, the microcomputer 13 executes step S6.
Then, the user operates the keyboard 14 to determine whether or not the key input for selecting the desired channel has been made. When the key input for the channel selection has been made (YES), the step In S7, the 2nd converter 12 is controlled so as to extract the frequency band corresponding to the selected channel.

Next, in step S8, the microcomputer 13 reads the control code detected by the control code detection circuit 25, and in step S9, whether bit7 indicates a television broadcasting channel or a television non-broadcasting channel. If it is determined that bit7 indicates a television broadcast channel (broadcast), the process returns to step S6.

If it is determined in step S9 that bit7 indicates a television non-broadcast channel (non-broadcast), the microcomputer 13 determines in step S9.
In step S6, the channel selected before the key input is returned to the channel selected in step S6, and the process returns to step S6. As a result, the 2nd converter 12 is controlled so as to select the channel selected before the key input, and the channel is automatically canceled. This method of canceling a channel is effective when a channel selection operation is performed by directly inputting a target channel number and using a direct channel selection key.

Therefore, according to the configuration of the above embodiment, when the selected channel is the television non-broadcast channel, the channel is automatically canceled and the channel previously selected is selected. Since it is set back, it is possible to prevent the channel from being viewed and prevent the viewer from feeling distrustful.

In the above embodiment, the satellite television broadcasting system has been described as an example. However, the present invention is not limited to this, and the present invention is, for example, a CATV (cable television) broadcasting system or an ordinary terrestrial television. It goes without saying that it can be widely applied to the John broadcasting system and the like. The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

[0024]

As described above in detail, according to the present invention,
When a television non-broadcast channel is selected, it is possible to provide an extremely good broadcast receiving device that prevents the channel from being viewed and does not cause the viewer to feel distrust.

[Brief description of drawings]

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

FIG. 2 is a flowchart shown to explain an example of the operation of the embodiment.

FIG. 3 is a flowchart shown to explain another example of the operation of the embodiment.

[Explanation of symbols]

11 ... Input terminal, 12 ... 2nd converter, 13 ... Microcomputer, 14 ... Keyboard, 15 ... FM demodulation circuit, 16 ... De-emphasis circuit, 17 ... Dispersal removal circuit, 18 ... Image amplification circuit, 19 ... Output terminal,
20 ... QPSK demodulation circuit, 21 ... PCM demodulation circuit, 22
... D / A converter, 23, 24 ... Output terminal, 25 ... Control code detection circuit.

Claims (2)

[Claims] 1. A broadcast receiving apparatus for receiving and selecting a broadcast signal of a plurality of channels including broadcast and non-broadcast, which is added to each of the plurality of channels, the channel being a broadcast channel or a non-broadcast channel. A reading means for reading an identification code indicating that the channel is selected from the selected channel, and the identification code read by the reading means indicates a non-broadcasting channel, and is read before or after the selected channel. A broadcast receiving apparatus comprising: a control unit for automatically selecting a broadcast channel. 2. A broadcast receiving apparatus for receiving and selecting a broadcast signal of a plurality of channels including broadcast and non-broadcast, which is added to each of the plurality of channels, the channel being a broadcast channel or a non-broadcast channel. A reading means for reading an identification code indicating that the channel is selected from the selected channel, and the identification code read by the reading means indicates a non-broadcasting channel, and the channel is selected before the selected channel. A broadcast receiving device, comprising: a control means for automatically selecting a previously selected broadcast channel.