JPH0361382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention is used in satellite broadcasting receiving systems to display audio subcarrier frequencies before presetting, after presetting, and to display unreproducible signals for adults, etc. The present invention relates to a display device that displays various types of displays (hereinafter referred to as parental lock displays).

"Prior Art" First, an outline of a satellite broadcast television receiver will be explained. Currently, in the United States, the interval is 2 to 5 degrees.
More than 20 private broadcasting geostationary satellites have been launched, each receiving signals using a television receiver equipped with an antenna position control device as shown in Figure 4. In this figure, 1 is a reflector of a parabolic antenna, an antenna 2 is installed at the focal point of this reflector 1, and a low noise amplifier and down converter 3 coupled to this antenna 2 are connected to a receiver 4 via a cable. combined. A monitor TV 5, an audio device 6, and an antenna positioner 7 are connected to the receiver 4, and the audio device 6 is connected to left and right speakers 9, 1 via an audio amplifier 8.
0 is connected. Further, the antenna positioner 7 is coupled to the antenna 2 and an actuator 12 for pointing to the position of the geostationary satellite 11.

In the above configuration, when a certain satellite 11 is selected by the antenna positioner 7, a command from the CPU in the antenna positioner 7
The motor drive section generates a DC control signal, this signal is applied to the DC motor in the actuator 12,
The rotation of this DC motor directs the reflector plate 1 for the disassembled antenna toward the target satellite. At this time,
Generates pulses in synchronization with the rotation of the DC motor,
This pulse is sent to the CPU via the pulse receiving section in the antenna positioner 7, and counted by the CPU. This number of pulses determines the current position of the antenna and allows it to be moved to a preset satellite position. At the same time, the angle of the metal rod inside the antenna 2 is set depending on whether the wave is vertically polarized or horizontally polarized. Furthermore, each satellite
Since it is equipped with 24 channels, one of the channels is selected using the antenna positioner 7.

The 3.7~4.2GHz signal from the satellite 11 is reflected by the reflector 1, received by the antenna 2, and converted to 430~930MHz by the low noise amplifier and down converter 3.
and sent to receiver 4. The antenna positioner 7 sends to the receiver 4 a control code signal indicating which video channel is selected. The input signal from the antenna 2 is further reduced to 90MHz by the receiver 4, and then separated into a video signal and an audio signal.
sent to. The audio signal separated by the receiver 4 is carried by a subcarrier signal of 5 to 8.5 MHz and sent to the audio device 6. At this time, a control code signal is sent to the audio device 6 from the antenna positioner 7 to indicate which satellite and which channel the audio is from. That is, the audio device 6 transmits information such as the distinction between discrete stereo, matrix stereo, multiplex stereo, and monaural, and the frequency of the subcarrier. Further, the audio device 6 performs audio intermediate frequency amplification and FM detection, and the audio amplifier 8 further amplifies and outputs audio from left and right speakers 9 and 10.

In the above satellite broadcasting receiving system,
The audio signal is sent to the input circuit of the audio device 6 at 5 to 8.5M.
Hz subcarrier, but not only does the frequency of the subcarrier differ depending on the satellite number and channel, but also 1-channel transmission that transmits on one frequency, and 2-channel transmission that transmits on two frequencies. There are two methods: channel transmission, 3-channel transmission that transmits on three frequencies, and
There are also discrete systems, matrix systems, and multiplex systems for stereo, and you must choose one of these systems depending on your purpose. Specifically, for example, input is made in the following state.

(1) 6.8MN (monaural): L+R monaural signals are being transmitted on one 6.8MHz subcarrier.

(2) 6.8MX (Multiplex Stereo): 6.8M
L and R are transmitted on one Hz subcarrier by multiplex broadcasting.

(3) 6.2 & 6.8MN: For example, the exact same L+R is being transmitted on 6.2MHz and 6.8MHz, or 6.2MHz
and is being transmitted in two languages on 6.8MHz.

(4) 5.8 & 6.8MS (matrix stereo): For example, L+R is sent to the 5.8MHz subcarrier, and L-R is sent to the 6.8MHz subcarrier.

(5) 6.8MN/5.58 & 5.76DS (discrete stereo): L+R on 6.8MHz subcarrier,
L signals are being sent to 5.58MHz and R signals are being sent to 5.76MHz.

Conventionally, in a receiving device that receives audio signals as described above, when a satellite number and a channel number are selected using the antenna positioner 7, the A channel down button and the A channel down button in the keyboard provided on the audio device 6 are pressed. Select the channel frequency manually using the channel up button, B channel down button, and B channel up button, and select the mode such as monaural or stereo, and if stereo, the system using the monaural/stereo mode selection button. was.

Therefore, there was a problem that it was time-consuming and extremely troublesome. Therefore, the present applicant has proposed that data corresponding to satellite numbers and channel numbers be stored in a memory and automatically selected when a desired channel of a desired satellite is selected.

``Problems that the invention seeks to solve'' However, whether or not the data is already stored in memory, and whether it is definitely in memory when the operation for memorization is performed, is for adults only and cannot be shown to children. It would be extremely convenient and desirable to be able to display information such as whether the device is a parental lock or not, even if the device is selected for personal use.

"Means for Solving the Problem" The present invention directs the antenna to the target satellite by selecting the satellite number and channel number, and also provides a password for parental lock for some channels of some satellites. An antenna positioner that directs the antenna by number and outputs control signals for audio and video signals, a receiver that separates the signal received by the antenna into video and audio signals, and a monitor TV that plays back the video signal.
, an audio reproduction circuit for reproducing the A channel signal from the received audio signal, an audio reproduction circuit for reproducing the B channel signal, an A channel tuning button,
A keyboard with a B channel tuning button, a stereo mode switching button, and a memory write button, a control signal using the satellite number and channel number from the antenna positioner, and a control signal using a password for parental lock. A memory for storing the audio frequency data of the B channel by operating the memory write button, an indication of no storage when the data is not stored in the memory, and a digital display of the frequency when it is stored in the memory. , a display that selectively displays a display indicating that the satellite is being stored in the memory, and a parental lock indicating that playback is not possible when the channel of the satellite to which the password corresponds is selected with a password other than the password; The device includes the antenna positioner, a reproducing circuit, a keyboard, and a microcomputer connected to the memory and controlling mutual signal and data exchange.

``Operation'' (1) If the subcarrier frequency or stereo mode suitable for the target satellite is not stored in the memory, a message indicating that there is no memory will be displayed when the power is turned on.

(2) If the subcarrier frequency and stereo mode suitable for the target satellite are stored in memory, the frequency will be displayed digitally on the display.

(3) A flashing display will appear in the memory for a certain period of time when memorization is in progress.

(4) This is intended for adults and cannot be seen by children, so when you enter your PIN on the antenna positioner, even if you select the desired channel number for the desired satellite, a pair that cannot be played will be displayed. Display rental lock (PL).

“Example” An example of the present invention will be described below with reference to FIG.

Reference numeral 30 denotes an audio input terminal for an audio signal inputted from the receiver 4 on a subcarrier signal of 5 to 8.5 MHz. An A channel reproducing circuit 31 and a B channel reproducing circuit 32 are connected in parallel to this audio input terminal 30, and their output sides are connected to a monaural/stereo mode switching circuit 33.
It is coupled to the L output terminal 34 and the R output terminal 35 via.

The two reproduction circuits 31 and 32 are connected to a microcomputer (hereinafter referred to as microcomputer) 38 via channel tuning circuits 36 and 37, respectively. The channel tuning circuits 36 and 37 are PLL (Phase Locked Loop) circuits 39 and 37, respectively.
40, tuning circuits 41 and 42 consisting of coils and variable capacitance capacitors, and oscillation circuits 43 and 44.

The microcomputer 38 further includes displays 55 and 56 for tuning frequency of each channel A and B, a keyboard 57, a memory (ROM) 58 for storing programs, etc., a memory (RAM) 59 for storing data, FIG. Input terminal 60 for the control signal when selecting the satellite number and channel number from the antenna positioner 7 in A mode switching circuit 33 is coupled thereto.

The keyboard 57 has a power on/off button 4.
5. A channel frequency down button 46 and up button 47, B channel frequency down button 48 and up button 49, DS (discrete stereo) button 50 and MS for controlling the mode switching circuit 33.
A stereo mode switching button 53 consisting of a (matrix stereo) button 51 and an MN/MX (monaural/multiplex stereo) button 52, a memory write button 54 to a memory (RAM) 59, etc. are provided.

Next, the operation of the above configuration will be explained.

(1) If the power is turned on without any presets and there is no memory in the antenna positioner 7, the displays 55 and 56 will show 3 as shown in Figure 2.
The horizontal bar of the book appears. When you select the satellite number and channel number with antenna positioner 7,
If it has not been preset on the microcontroller 38, the most frequently used 6.8MHz will be set on the display 55.
The display will blink for about 5 seconds.

(2) Next, when the A channel down button 46 and the A channel up button 47 of the keyboard 57 are pressed, the oscillation frequency of the A channel tuning circuit 36 is output via the microcomputer 38, and the A channel reproducing circuit 31 outputs the oscillation frequency of the A channel tuning circuit 36. The frequency signal is reproduced and the frequency is displayed on the display 55 at the same time.
Similarly, for the B channel, the desired intermediate frequency signal is obtained by the B channel reproducing circuit 32 and displayed on the display 56. Also, when the stereo switching button 53 is selected for mode switching, the mode switching circuit 33
is switched, and the target audio signal is output to the output terminals 34 and 35. Here, when the memory write button 54 of the keyboard 57 is pressed, the displays 55, 5
6 flashes for a certain period of time, and data such as the satellite number, channel number, A and B channel frequencies, and stereo mode are stored in a memory (RAM) 59.

Similarly, all data is stored in memory (RAM) 59 for each satellite number and channel.

(3) When selecting the satellite number and channel number using the antenna positioner 7, if the program is aimed at adults and you do not want children to see, enter your password using the antenna positioner 7. A control signal based on the password is input to the microcomputer 38 via the input terminal 60 and locked. As a result, even if the antenna positioner 7 selects a normal satellite number and channel number other than the password, the display 55, 5
6, as shown in FIG. 3, PL is displayed to indicate that the file is parentally locked, that is, playback is not possible.

"Effects of the Invention" Since the present invention is configured as described above, it is possible to distinguish whether or not the subcarrier frequency is stored in the memory, and if it is stored, the frequency, and the parental lock that cannot be reproduced because it is for adults. The same display can display information such as whether the data is being stored in memory or not.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the display device for a satellite broadcast receiving system according to the present invention, FIG. 2 is an explanatory diagram of an example of the display on the display when no information is stored in the antenna positioner, and FIG. FIG. 4 is an explanatory diagram of an example of a display on a display when a program is for adults, and is a block diagram of a satellite broadcast receiving system.

Claims (1)

[Claims] 1. An antenna can be directed to a target satellite by selecting a satellite number and a channel number, and for some channels of some satellites, the antenna can be directed by a password for parental lock. an antenna positioner that outputs control signals for audio and video signals, a receiver that separates the signals received by the antenna into video and audio signals, a monitor TV that plays back the video signals, and an A from the received audio signals. an audio reproduction circuit that reproduces the signal of the B channel; an audio reproduction circuit that reproduces the signal of the B channel; a keyboard having an A channel tuning button, a B channel tuning button, a stereo mode switching button, and a memory write button; and the antenna positioner. A memory that stores the audio frequency data of the A channel and B channel by operating the memory write button in response to a control signal based on the satellite number and channel number from , and a control signal based on the password for parental lock. , a display indicating that the frequency is not stored when it is not stored in the memory, a digital display of the frequency when it is stored in the memory, a display indicating that the frequency is being stored in the memory, and a password indicating the channel of the satellite to which the password corresponds. A display device that selectively displays each display of a parental lock display that cannot be reproduced when a selection other than the number is selected; 1. A display device for a satellite broadcast receiving system, comprising a microcomputer for controlling the system. 2. A display device for a satellite broadcast receiving system according to claim 1, wherein the display device includes three-digit LEDs for both the A channel and the B channel. 3 The display shows the digital frequency when there is no memory, the frequency digital display when the memory is in progress, the frequency blinking display when memorization is in progress, and the P-L display when the parental lock that cannot be played back with a password is displayed. A display device for a satellite broadcast receiving system according to claim 2, wherein the display device is configured to: