JPH0865661A - Satellite broadcasting tuner - Google Patents

Abstract

PURPOSE: To display whether setting is an initial value or not on an LED and a setting picture. CONSTITUTION: This tuner is composed of a tuning demodulating part 1 for performing the tuning, amplification and FM demodulation of any desired satellite broadcasting channel from an IF signal, voice processing part 2 for demodulating the signal to a PCM signal, video signal processing part 3 for reproducing a source video signal, switching part 4 for video signals, deciding part 5 for deciding whether the present setting shows initial setting data or not, onscreen display part 6 for outputting the setting picture to display the input setting and the presence/absence of any change in set items, LED display part 7 for displaying the presence/absence of item changes for each channel, panel display part 8 for displaying the tuned channel and the set value, input setting part 9 for performing the key inputs of tuning and setting, storage part 10 for storing change presence/absence data for each channel or set item, memory part 11 for storing the initially set data and data set later, and control part 12 for controlling the respective parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast tuner that allows a user to make settings for adjustment.

[0002]

2. Description of the Related Art FIG. 5 shows a block diagram of an embodiment of a conventional satellite broadcast tuner. Reference numeral 1 supplies a signal for adjusting the polarization plane of the converter of the antenna section to the same converter, selects a desired satellite broadcasting channel from the IF signal sent from the converter of the antenna section, amplifies and FM demodulates it into a video signal. It is a channel selection demodulation unit that generates an audio PCM subcarrier signal. A video signal processing unit 3 reproduces the original video signal by separating the video signal and extracting the video signal and removing the energy diffusion signal. Reference numeral 2 is an audio processing unit that separates the audio PCM subcarrier signal, extracts it, and demodulates it into a digital signal of a PCM code string. Reference numeral 9 is an input setting section for performing key input for channel selection and setting. Reference numeral 8 denotes a panel display section for displaying the selected channel and the set value. Reference numeral 11 denotes a memory unit that stores initial setting data and data set later. Reference numeral 12 is a control unit that controls each unit.

The operation of the conventional satellite broadcast tuner will be described. When the power is turned on and the desired satellite channel is keyed in to the input setting unit 9 using, for example, a remote controller, the control unit 12 determines, based on the setting data stored in the memory unit 11, a predetermined number, character, or symbol. The panel display unit 8 is configured by displaying predetermined information such as LCD (liquid crystal) display.
And the setting data is transmitted to the channel selection demodulator 1. The tuning / demodulating unit 1 supplies power and polarization plane switching data to the antenna unit connected to the outside, and selects a desired satellite broadcasting channel from the IF signal sent from the converter of the antenna unit. Amplify and FM demodulate to generate a video signal and an audio PCM subcarrier signal. The video signal processing unit 3 separates and extracts the video signal, and reproduces the original video signal by processing such as energy diffusion signal removal. The audio processing unit 2 separates and extracts the audio PCM subcarrier signal and demodulates it into a digital signal of a PCM code string.

By the way, in the normal case, in the memory section 11,
A satisfactory picture or sound can be obtained in the receiving state based on the initial setting (standard setting) data set in advance in the factory. However, in the environment where satellite broadcasting is received, for example, when the mounting angle of the antenna is inaccurate and the variation is large,
In an environment such as when there is interference from adjacent channels, the inclination of the polarization plane of the converter in the antenna section, the bandwidth of the video signal, the value of the tuning frequency, etc. can be used to determine the optimal picture and sound for each satellite broadcasting channel. Need to be adjusted so that

The adjustment in this case is switched to the adjustment setting mode by inputting a predetermined command and the channel number from the input setting unit 9, and initially, the setting data for adjustment (fine adjustment) is stored in the memory unit for each channel. The initial setting (standard setting) data already stored in the setting data reference area 11 is stored. In this state, the mode is returned to the reception mode, and each unit operates based on the setting data for adjustment (fine adjustment), and a better picture or sound can be obtained than the standard setting. The initial setting data is always stored in the initial setting data area of the memory unit 11, for example, a non-volatile memory such as a ROM, and is called to the setting data reference area of the RAM for use when necessary.

[0006] However, the conventional satellite broadcast tuner has a function of easily displaying whether the reception state of the currently selected satellite broadcast channel is based on the initial setting data or based on the optimally adjusted setting data. Therefore, when adjusting (fine-adjusting) the satellite broadcast tuner, there is a problem that the adjusting operation is complicated, for example, the setting data that has already been adjusted (fine-adjusted) is readjusted.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a satellite broadcast tuner for easily displaying whether or not the present setting is initial setting data for each setting item for each satellite broadcasting channel. The purpose is to provide.

[0008]

In order to achieve the above-mentioned object, a signal for adjusting the polarization plane of a converter of an antenna unit is supplied to the converter and a desired satellite broadcasting is performed from an IF signal sent from the antenna unit. A channel demodulator that tunes a channel, amplifies it, and FM demodulates it to generate a video signal and an audio PCM subcarrier signal, and reproduces the original video signal by separating the video signal and extracting the energy spread signal. Video signal processing unit and the audio PCM
An audio processing unit that separates and extracts the subcarrier signal and demodulates it into a digital signal of a PCM code string, an input setting unit for key input of channel selection and setting, and a display unit that displays channel selection and setting values. In a satellite broadcasting tuner consisting of a memory unit that stores initial setting data and data set later, and a control unit that controls each unit, the current setting data differs from the initial setting data for each channel and each setting item. A storage unit for storing change presence / absence data indicating whether or not, a determination unit for determining whether or not the current setting data is initial setting data, and a setting item for each channel based on the change presence / absence data in the storage unit. A change presence / absence display section that displays the presence or absence of changes and a set value is input and displayed for each setting item for input setting, and appropriate settings are made based on the change presence / absence data. Input and switch the on-screen display unit that generates a setting screen that displays whether or not the eyes have been changed and outputs the video signal, and the video signal that the video signal processing unit has reproduced and the video signal that the on-screen display unit has generated. It is composed of a switching unit for outputting.

[0009]

With the above configuration, when the predetermined setting and channel number are input from the input setting section to switch to the adjustment setting mode, the control section displays the setting screen of the corresponding channel taken out from the on-screen display section. Is displayed on the screen (omitted) via the switching unit, the input setting unit inputs the adjustment data into the corresponding setting items by a predetermined method, rewrites the numerical values on the screen, and the memory unit displays the adjustment (fine adjustment). ) Setting data is stored by replacing it with the data already stored in the setting data reference area, and the judging section refers to the corresponding initial setting data in which the current setting data is stored in the initial setting data area of the memory section. Then, the storage unit stores the result for each channel by, for example, a method of setting a flag indicating that there is a change in the case of determination of no and setting the result. The change presence / absence display unit displays the presence / absence of a change with reference to the flag of the storage unit. Further, the on-screen display unit displays the setting items and the like on the setting screen by adding a mark for displaying the presence or absence of the change.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A satellite broadcast tuner according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a satellite broadcast tuner according to the present invention. Incidentally, FIG.
The same parts as those of the conventional example are denoted by the same reference numerals and the description thereof will be omitted. Reference numeral 10 associates and stores change presence / absence data indicating whether or not the current setting data is different from the initial setting data for each channel or each setting item. For example, the change presence / absence data is flag (1, 0) or the like. Is a storage unit for storing using. Reference numeral 5 is a determination unit that compares the current setting data with the corresponding initial setting data stored in the initial setting data area of the memory unit to determine whether the current setting data is the initial setting data. .

7 is composed of at least one LED,
It is an LED display unit (change presence / absence display unit) which illuminates and displays the presence / absence of a change in the setting item for each channel based on the change presence / absence data stored in the storage unit 10. 6 is a setting for displaying each setting item and the input set value in the adjustment setting mode, and displaying whether or not the corresponding setting item is changed with reference to the change / non-change data stored in the storage unit 10. An on-screen display unit that generates a screen and outputs the video signal. Reference numeral 4 inputs a video signal (analog R, G, B signals, etc.) reproduced by the video signal processing unit 3 and a video signal (analog R, G, B signals, etc.) generated by the on-screen display unit 6. However, it is a switching unit configured to switch and output, for example, a high-speed analog switch.

The operation of the satellite broadcast tuner according to the present invention will be described with reference to FIGS. 1 to 4. It should be noted that the description of the same overlapping operation as that of the conventional example of FIG. 5 is omitted. When a predetermined command, channel number, etc. are input from the input setting unit 9 to switch to the adjustment setting mode, the control unit 12 takes out the corresponding channel (S) shown in FIG.
The setting screen of 11) is displayed via the switching unit 4 (omitted)
To display. Furthermore, a predetermined method is selected from the input setting section 9, for example, the item A in FIG. The adjustment data is input to the corresponding setting item by the above method, and the set value on the screen shown in FIG. 3 is rewritten.

At this time, the setting data for adjustment (fine adjustment) is stored in the setting data reference area of the memory unit 11 by replacing the already stored data. Therefore, in the normal reception mode, adjustment (fine adjustment) of the corresponding item is performed. The determination unit 5 also refers to corresponding initial setting data stored in an initial setting data area of the memory unit, for example, a nonvolatile memory such as a ROM, to determine whether or not the current setting data match. Then, the same result is set for each channel in the storage unit 10 by using a method of setting a flag '1', for example, if there is a change in the case of determination of no, and setting a flag '1'. And the flag of the change presence / absence data are stored in association with each other.

The change presence / absence (LED) display section 7 is, for example,
As shown in FIG. 2, it is composed of a plurality of LEDs provided on the front surface of the satellite broadcasting tuner case corresponding to each setting item, and the LED of the corresponding setting item is set based on the flag stored in the storage unit 10. It is lit to display so that you can see if there are any changes. It should be noted that the LED display unit 7 may light up the presence / absence of the change only in the adjustment setting mode, and in the normal reception mode, it may be used for other purposes such as PCM voice mode display. Further, since the on-screen display unit 6 displays whether or not there is a change in a corresponding setting item or the like on the setting screen for each channel, the arrow and the background color shown in FIGS. 3A and 3B are changed, Alternatively, display such as changing the character color is performed.

[0015]

As described above, the present invention provides a satellite broadcast tuner for easily displaying whether or not the current setting is initial setting data for each setting item for each satellite broadcasting channel. Therefore, if you want to adjust and set the satellite tuner to get a good picture or sound, determine whether the reception status of the currently selected satellite channel is based on the initial setting data or the optimally adjusted setting data. For example, you can easily know by turning on the LED provided on the front of the tuner or by displaying the setting screen.
There is an advantage that the waste of re-adjusting the setting data that has already been adjusted (fine adjustment) can be prevented and the adjustment operation can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a satellite broadcast tuner according to the present invention.

FIG. 2 is an external view of a satellite broadcast tuner according to the present invention.

FIG. 3 is a diagram of an example of a setting screen of a satellite broadcast tuner according to the present invention.

FIG. 4 is an image diagram in which a storage item of a satellite broadcast tuner according to the present invention stores setting items and change presence / absence data in a table format in association with each other.

FIG. 5 is a block diagram of an embodiment of a conventional satellite broadcast tuner.

[Explanation of symbols]

 1 Channel selection demodulation unit 2 Audio processing unit 3 Video signal processing unit 4 Switching unit 5 Judgment unit 6 On-screen display unit 7 LED display unit (change / non-change display unit) 8 Panel display unit 9 Input setting unit 10 Storage unit 11 Memory unit 12 Control unit

Claims (7)

[Claims] 1. A channel selection demodulation section for selecting a desired satellite broadcast channel from an IF signal sent from an antenna section, amplifying and FM demodulating it to generate a video signal and an audio PCM subcarrier signal, and the video signal. A video signal processing unit that separates and extracts the original video signal, an audio processing unit that separates and extracts the audio PCM subcarrier signal into a digital signal of a PCM code string, and a key input for channel selection and setting Satellite broadcasting consisting of an input setting unit for displaying the selected channel, a display unit for displaying the selected channel and setting value, a memory unit for storing initial setting data and data set later, and a control unit for controlling each unit. In the tuner, a storage unit that stores change presence / absence data indicating whether or not the current setting data is different from the initial setting data for each channel and each setting item, and the current setting data. Determination unit for determining whether or not the data is initial setting data, a change presence / absence display unit for displaying the presence / absence of a change in the setting item for each channel based on the change presence / absence data in the storage unit, and a setting item for input setting The set value is input and displayed for each, and the on-screen display section that generates a setting screen that displays whether or not the corresponding setting item is changed based on the change presence / absence data and outputs the video signal, and the video signal processing section reproduces it. A satellite broadcast tuner characterized in that it comprises a switching unit for inputting and switching between the input video signal and the video signal generated by the on-screen display unit. 2. The satellite broadcast tuner according to claim 1, wherein the change presence / absence display section is composed of at least one LED. 3. The satellite broadcast tuner according to claim 1, wherein the change presence / absence data stored in the storage unit is stored in association with a setting item for each channel. 4. The satellite broadcast tuner according to claim 3, wherein the change presence / absence data is represented by using a flag. 5. The satellite broadcast tuner according to claim 1, wherein the switching unit is composed of an analog switch. 6. The satellite broadcast tuner according to claim 1, wherein a mark for identifying the changed setting item is added to the setting screen of the on-screen display section. 7. The satellite broadcast tuner according to claim 6, wherein a character color or a background color is changed as the mark.