JPH0591441A - Television receiver - Google Patents

Abstract

PURPOSE:To quickly select the desired input by providing a means which designates one or more inputs to prevent an input switch means which selects the inputs in turn from selecting the designated input. CONSTITUTION:If a memory number to which the necessity or unnecessity of input is not decided yet, '1', is added to the memory number. When the data on a memory number 2 is equal to '1', the necessity of input is decided and an external input 2 is selected. As a result, the output of a signal switch circuit 105 is switched to an external input 2 102 with the control lines (a) and (b) set at H and L respectively. At the same time, the selection of the input 2 102 is displayed by a microcomputer 108 via a video cross processing circuit 106. In such a constitution, the input 2 102 can be selected in a front and selecting state by a single input switching operation and with skip of an external input 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to a multi-input television which supports various input formats.

[0002]

2. Description of the Related Art With the spread of VTRs and VDPs, television receivers have more and more opportunities to be used for multiple purposes.
In addition to the built-in F / VHF tuner, more and more devices have an external input terminal. A television receiver provided with this external input terminal will be described with reference to FIG. FIG. 2 is a block diagram of a television receiver having an external input terminal. In the figure, 100 is UHF /
VHF antenna, UHF / V 104 including IF circuit
HF tuner (hereinafter referred to as front end) 101-
103 is an external input terminal, 105 is a signal switching circuit, 106
Is a video chroma processing circuit, 107 is a display device including a video output circuit, 108 is a microcomputer, 109 is a remote control light receiving section, and 110 is a key switch. The operation will be described. A normal ON AIR signal is output from the front end 104 as a composite video signal and input to the signal switching circuit 105. From the external input terminals 101 to 103, for example, a VTR reproduction signal or the like is input and reaches the signal switching circuit 105. In the signal switching circuit 105, by the control signals a and b from the microcomputer 108,
For example, the control as shown in FIG. 3 is performed, and one of the four is selected, output, and sent to the video chroma processing circuit 106. In order to output the control signals a and b to the microcomputer 108, a code is sent to the remote control light receiver 109 by the remote control transmitter, or a key is input using the key switch 110. At this time, the keys and key switches of the remote control transmitter may be assigned to the respective combinations of a and b in FIG.
Generally, a method in which one key is assigned and the input is selected in order each time the key is pressed is the mainstream method. Therefore, for example, in this example, the front end 104, the external input 1
101, external input 2 102, external input 3 103, and so on are selected in order, and then the process returns to the front end 104. Therefore, in order for the person who has selected the external input 1101 to select the front end 104, at least three key operations are required, but there is an advantage that the number of keys can be one.

[0003]

As described above, if the input switching means for sequentially selecting a plurality of inputs is used as the input switching means, a television receiver corresponding to a plurality of input signals can be comparatively used. It can be realized easily.

By the way, in recent years, NHK has proposed a MUS as a method for transmitting a high-definition signal and this signal.
There are signs that the E method is becoming widespread. Therefore, it has become necessary for the television receiver to support the above-described high-definition signals in addition to the existing television signals. In such a multimedia-compatible television receiver, it is necessary to provide a large number of external input terminals (when there are many, about eight terminals), and in the above-mentioned input switching means, the key is repeatedly pressed until the desired input is selected. There is a problem that it is inconvenient to use because it has to be operated. An object of the present invention is to improve such usability without increasing the number of keys.

[0005]

In order to achieve the above object, a designating means for designating at least one of the inputs of a television receiver is provided, and the input designated by this designating means is described above. The input switching means for sequentially selecting the selected inputs cannot be selected.

[0006]

By doing so, the number of inputs selected by the input switching means can be limited to the necessary number. Therefore, for example, even in a television receiver having a large number of inputs, unnecessary input terminals can be skipped and switched for reasons such as no external device being connected, which is very convenient. ..

[0007]

Embodiments of the present invention will be described below with reference to FIGS. 1, 2 and 4. In the present embodiment, for convenience of explanation, the block diagram itself of the television receiver provided with the external input terminal is exactly the same as that of FIG. It is assumed that the configuration is provided and only the operation of the microcomputer 108 is different. FIG. 1 shows a microcomputer 108.
6 is an example of a flowchart of input switching setting and actual input switching, which are the processes performed in FIG. FIG. 4 is an explanatory diagram for explaining the setting of the input switching memory and the control signal. First, a method of setting input switching will be described. When the input switching setting mode is selected at 121,
At 122, the memory number is designated as 0. As can be seen from FIG. 4, the memory number 0 specifies the front end 104 in FIG. Next, at 123, for example, if "necessary" is selected, "1" is written in the memory at 124. 126 if the setting still continues
In "," select "NO" and proceed to 128, where 1 is added to the memory number. Here, the memory number is 1. This means that the external input 1 is designated from FIG. 1
In step 23, if you select "Unnecessary" this time, 1
At 24, a "0" is written in the memory. The same setting is performed thereafter, and when the setting is completed for all the memory numbers 0 to 3, "YES" is selected in 126 and the setting is completed. The state in which the memory setting is completed in this way becomes, for example, the memory data in FIG.

Next, the actual input switching operation will be described. First, assume that the current output of the signal switch 105 of FIG. 2 is the input from the front end 104. When the input switch 131 is operated, the current memory number is read at 132. Here, the front end 104
Since is selected, the memory number is 0 according to FIG. Next, at 133, 1 is added to the memory number. However, in the embodiment, when the memory number is 3, the next number is 0 instead of 4. In this case, the memory number is 1. At 134, it is determined whether input is necessary or unnecessary by looking at the memory data when the memory number is 1. Here, since the memory data is 0, the determination is unnecessary and the routine proceeds to 136. This means that the external input 1 is not selected.
At 136, it is checked whether or not it is determined whether or not input is required for all prepared memory numbers. If all the memory numbers have been determined, the input switching indicates that at most one input has been set, and the processing ends at 138. At this time, input switching is not performed.

If there is a memory number in 136 that has not been determined as input required or not required, the process returns to 133 and 1 is added to the memory number. In the case of this example, the memory number is 2. At 134, since the data when the memory number is 2 is 1, this time, it is necessary to determine whether input is necessary or not, and the process proceeds to 135. This means that the external input 2 is selected. As a result, the output of the signal switch 105 in FIG. 2 is set by setting the control lines a and b to H and L, respectively.
Switches to external input 2 102. Also, the fact that the external input 2102 has been selected from the microcomputer 108 via the video chroma processing circuit 106 is displayed. Next, at 137, the memory number 2 corresponding to the current output
Is written and the input switching operation is completed at 138.

By the above operation, if the setting is made in advance as shown in FIG. 4, one input switching operation is performed.
From the state in which the front end is selected, the external input 1 can be skipped and the external input 2 can be selected. When the input switching operation is performed again, the external input 3 is skipped and the front end 104 can be selected according to the data shown in FIG. Therefore, according to the present embodiment, in the case of sequentially turning each input by the input switching operation, the input switching operation, which was conventionally required four times, can be halved twice.

[0011]

According to the present invention, it is possible to change the software without increasing the number of keys and switches of the remote control transmitter.
The number of key operations when selecting a desired input can be reduced, and usability can be improved.

[Brief description of drawings]

FIG. 1 is a flowchart illustrating an input switching setting operation and an input switching operation.

FIG. 2 is a block diagram of a television receiver including a composite video signal input terminal.

3 is a diagram showing an example of control of a signal switching circuit 105 by control devices a and b in FIG.

FIG. 4 is an explanatory diagram for explaining a setting state of a memory for input switching and a control signal.

[Explanation of symbols]

100 ... UHF / VHF antenna, 101-103 ... Composite video signal input terminal, 104 ... UH including IF processing circuit
F / VHF tuner circuit, 105 ... Signal switching circuit, 10
6 ... Videochroma processing circuit, 107 ... Display device including video output circuit, 108 ... Microcomputer, 10
9 ... Remote control light receiving section, 110 ... Key switch, a, b Control lines for controlling the signal switching circuit 105 from the microcomputer 108.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hiroyuki Tago Inventor Hiroyuki Tago, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd.Yokohama factory, Hitachi, Ltd. (72) Kazuhara Kasahara 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi, Ltd. AV equipment division

Claims (1)

[Claims] 1. A UHF / VHF tuner or satellite broadcast tuner, NTSC composite video signal input terminal, S video signal input terminal, MUSE detection input terminal, RGB for computer.
Input terminal, high-vision input terminal (RGB or YP
At least one or more of _B P _R), a plurality forgive overlap, in a television receiver having an input switching means for selecting sequentially said plurality of inputs of said plurality of inputs, A television receiver comprising a designating means for designating at least one or more, wherein the input designated by the designating means cannot be selected by the input switching means.