JPH04234272A - Switching device for color television receiver - Google Patents

Abstract

PURPOSE:To simplify a channel selection operation by presetting either an arbitrary input terminal out of plural input terminals or output from a satellite broadcast transmission/reception part. CONSTITUTION:When a user performs channel preset or the operation of channel selection, etc., by performing the key operation of a key operating part 8, a microcomputer 7 for control controls the satellite broadcast transmission/ reception part 5, a signal selection circuit 6, and an on-screen circuit 9 according to a signal from the key operating part 8. The circuit 6 selects and outputs a signal designated by each input from the input terminals(V1 terminal to V4 terminal) 4 and the reception part 5 according to the control signal of the microcomputer 7. Thereby, it is possible to preset either the arbitrary input terminal out of the plural input terminals 4 or the output from the satellite broadcast transmission/reception part 5 other than the setting of a satellite broadcast channel in a satellite broadcast mode.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is a color television receiver that selectively receives normal terrestrial broadcasting and satellite broadcasting. The present invention relates to a color television receiver that simplifies the channel selection operation when there are many reception modes, such as processing a signal with an external device and then inputting it again to the color television receiver.

0002

2. Description of the Related Art Conventionally, various measures have been taken in color television receivers in order to accommodate the wide variety of reception modes described above. An example is shown in FIGS. 4(A) and 4(B). FIG. 4(A) is a block diagram of main parts of a color television receiver 11 equipped with three input terminals. Input terminal 14
The V1 and V2 terminals are input terminals with a commonly used structure, but the V3 terminal is a dedicated input terminal with an interlocking switch structure for satellite broadcast reception.
Connection cable 1 for transmitting output signals from external device 12
When the plug No. 3 is inserted, the changeover switch 15 is mechanically linked to change over. The movable piece c of the switch 15 is connected to the fixed piece a when the plug is inserted, and is connected to the fixed piece b when the plug is not inserted. Therefore, when the external device 12 is not used (the plug is not inserted), the detected output signal from the satellite broadcast receiving section 16 is inputted to the signal selection circuit 17 via the switch 15. When the plug is inserted into the V3 terminal to use the external device 12, the selector switch 15 is switched to the a side, and the V3 terminal input signal is input to the signal selection circuit 17. Here, the external device 12 in this example is a device that decodes (descrambles) scrambled satellite broadcasting signals. That is, the external device 12 uses the scrambled detection output signal from the satellite broadcast receiving section 16 as an input signal and outputs a signal obtained by decoding the signal. At present, there are almost no color television receivers equipped with this decoding function, so such an external device is required. The signal selection circuit 17 has the function of selecting signals from the input terminal 14, the satellite broadcast receiving section 16, etc. according to the user's operation, and outputting the selected signals to the signal processing circuit 18.

FIG. 4(B) is a block diagram of a main part of a color television receiver 21 equipped with two input terminals. Input terminal 2
The V1 terminal of No. 3 is an input terminal for general functions, but the V2 terminal expands its functions during certain operations in addition to general functions. In other words, when the changeover switch 24 is set to the expansion side (a side), the input signal of the V2 terminal is selected as the reception mode selection, and in that state, channel selection in the satellite reception unit 25 is possible by operating the key operation unit 26. . When the selector switch 24 is on the normal side (b side), if the above channel is selected after selecting the input signal of the V2 terminal as the reception mode selection, the reception mode changes from the input of the V2 terminal to the input from the satellite broadcast receiver 16. Switch.

0004

[Problem to be Solved by the Invention] In FIG. 4(A), since there is one dedicated input terminal, two satellite broadcasting-related external devices are connected.
If the number exceeds 1, it cannot be handled. Further, since the V3 terminal is a dedicated input terminal, the terminal is wasted if the external device is not used. Furthermore, even in the case of broadcast reception that does not require the essential functions of the external device (for example, the descrambling function), the signal path passes through the external device, so the signal cannot be obtained unless the external device is turned on. I can't. On the other hand, Figure 4 (
B) also requires the changeover switch 24 and its operation. As described above, Figures 4 (A) and (B)
) Both examples include problems that should be improved in terms of operability, functionality, etc. SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a switching device for a color television receiver that has improved functionality regarding satellite broadcast reception and has simple operability (one-action direct channel selection operation).

[0005]

[Means for Solving the Problems] The present invention provides a color television receiver that selectively receives normal terrestrial broadcasting and satellite broadcasting, and when satellite broadcasting reception is selected and set to a preset state, each Setting any satellite broadcasting channel for each channel position and selecting any one of the multiple external device connection input terminals or the detection output from the satellite broadcasting receiving unit that receives satellite broadcasting and outputs detection output etc. The present invention provides a switching device for a color television receiver, which is equipped with means for setting either one of the following.

[0006]

[Function] In addition to setting the satellite broadcast channel, in the satellite broadcast reception mode, input can be made by making it possible to preset either any input terminal from among multiple input terminals or the output from the satellite broadcast reception section. The usage range of the terminal and the cooperation function between the input terminal and the satellite broadcast receiver have been expanded to simplify the channel selection operation.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A color television receiver switching device according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of essential parts showing an embodiment of a switching device for a color television receiver according to the present invention. In the figure, 1 is a color TV receiver, 2 is a MUSE system (high-definition) NTS
3 is a decoder that inputs the detection output from the satellite broadcast receiver 5 and decodes (descrambles) the scrambled satellite broadcast signal; 4 is an input terminal consisting of V1 terminal to V4 terminal;
Reference numeral 5 denotes a satellite broadcast receiving unit that receives satellite broadcasting and outputs a detected signal; 6, a designated signal is selected from each input signal from the input terminal 4 and the satellite broadcast receiver 5 according to a control signal from the control microcomputer 7, and outputs the selected signal; 7 is a key operation section 8
A control microcomputer controls the satellite broadcast receiving section 5, the signal selection circuit 6, and the on-screen circuit 9 according to the signals received from the satellite, and 8 is a key operation section through which the user performs general operations such as channel presetting or channel selection by key operations. ,
9 is an on-screen circuit that outputs a signal such as a preset state or a predetermined number such as a selected channel number on the screen;
Reference numeral 10 denotes a signal processing circuit for amplifying and processing the signals from the signal selection circuit 6 and the on-screen circuit 9.

Next, the functions and operations of the present invention will be explained with reference to FIG. 2 as well. FIG. 2 is a correlation diagram showing the correlation between an example of a preset state and a reception mode for an example of a channel position. Traditional channel presets assign broadcast channels (true channels) to each channel position.
It is common to preset only the following. As described above, in the present invention, in addition to the desired satellite broadcasting channel (true channel), each channel position has an input terminal for connecting to a TV (directly selecting the output signal from the satellite broadcasting receiver 5) or an external device. It is also possible to use the input terminals of 1 to 2), which expands the range of presets.

[0009] In FIG. 2, the channel position numbers are odd numbers because the true satellite broadcasting channel numbers are odd numbers in Japan, and are not an inevitable condition. In FIG. 2, "TV" is a preset mode in which the output signal from the satellite broadcast receiver 5 is directly selected because no processing (for example, descrambling, etc.) by an external device is required. If processing by an external device is required, the detected output signal from the satellite broadcast receiver 5 is processed by the external device and then returned to the input terminal 4. In this case, it is free to decide which external device to use for which input terminal. “V1” in Figure 2
This is a preset mode when a scrambled signal is decoded by the first external device 2 and its output is input to the V1 terminal of the input terminal 4. Similarly, “V2
" is a preset mode when a MUSE system (high vision) signal is converted to the NTSC system by the second external device 3 and its output is input to the V2 terminal. On the other hand, in the preset state, the channel position number and broadcast channel number are generally displayed on the screen when presetting (
(On-screen display) However, in the embodiment according to the present invention, the input terminal position is also displayed. For example, [5-
7-V2]. However, parentheses are excluded. The leftmost number is the channel position number, the center number is the true satellite broadcasting channel number, and the rightmost character is the input terminal position or T.
Each represents V. These display actions are performed by outputting a signal from the control microcomputer 7 to the on-screen circuit 9, which processes the signal in a predetermined manner and outputs it to the signal processing circuit 10. It is combined with the video signal from the selection circuit 6 and displayed on the screen. Tuning in the normal use state after being preset in this way allows so-called one-action direct tuning. In other words, in Fig. 2, for example, when selecting the true "7 channel" which is the radio wave of the MUSE method, if you select "5" as the channel position, the receiving satellite broadcast reception channel is the true "7 channel", A signal converted to the NTSC system by the second external device is received via the V2 terminal. In the case of other channel selections, the same method is used to set each channel position to the "receiving mode" shown in the figure.

Next, a description will be given based on FIG. 3. FIG. 3 is a flowchart for explaining the operation of the control microcomputer 7. Of these, FIG. 3(A) is a flowchart at the time of presetting. Set to satellite broadcasting mode in response to the satellite broadcasting mode preset command (ST1). Next, in response to a setting command for a designated channel position (CH-P), the position is set (ST2) and a signal necessary for displaying the position is outputted (ST3). Similarly, the designated broadcast channel (CH) is set (ST4) and its display signal output (S
T5) Furthermore, a designated input signal (TV or V1, etc.) is set (ST6) and its display signal is output (ST7). When the presetting is completed, these data (broadcast channel, input signal, display signal) are written (ST8). Figure 3 (
B) is a flowchart of direct channel selection after the above presetting is completed. When a channel position is specified by the channel selection operation, set the preset broadcast channel and input signal data (written data at the time of presetting) for that position (ST9).
and outputs the data (ST10).

[0011]

As explained above, according to the present invention, it is possible to simplify the channel selection operation when using multiple external devices for descrambling processing and other processing in satellite broadcast reception, and to This has the effect of increasing the number of devices that can be used, and greatly contributes to improving the functionality of color television receivers.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts showing an embodiment of a switching device for a color television receiver according to the present invention.

FIG. 2 is a correlation diagram showing a correlation between an example of a preset state and a reception mode for an example of a channel position.

FIG. 3 is a flowchart for explaining the operation of the control microcomputer 7. FIG.

FIG. 4 is a block diagram of main parts showing an embodiment of a switching device for a color television receiver according to a conventional method.

[Explanation of symbols]

1 Color TV receiver 2 First external device (down converter) 3 Second external device (decoder) 4 Input terminal 5 Satellite broadcast receiving section 6 Signal selection circuit 7 Control microcomputer 8 Key operation section 9 On-screen circuit 10 Signal Processing circuit 11 Color television receiver 12 External device 13 Connection cable 14 Input terminal 15 Changeover switch 16 Satellite broadcast reception section 17 Signal selection circuit 18 Signal processing circuit 21 Color television receiver 22 External device 23 Input terminal 24 Changeover switch 25 Satellite broadcast reception Section 26 Key operation section

Claims (2)

[Claims] Claim 1: In a color television receiver that selectively receives ordinary terrestrial broadcasting and satellite broadcasting, when satellite broadcasting reception is selected and set to a preset state, any satellite broadcasting can be received for each channel position. A color television set comprising means for setting a channel and setting any one of a plurality of external device connection input terminals or an output signal from a satellite broadcast receiver. Receiver switching device. 2. The color television receiver switching device according to claim 1, further comprising a control microcomputer that executes the means and controls an on-screen circuit that displays the preset state on-screen.