JP2000125223A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver by which the user can easily recognize program contents of other channels. SOLUTION: A video signal and an audio signal corresponding to a bilingual broadcast are respectively outputted through a picture tube 46 and a speaker 38 while viewing the bilingual broadcast. When a commercial(CM) is broadcast during viewing, a microcomputer 26 discriminates a stereo signal based on an output signal from an audio multiplexer circuit 28. In this case, switches SW1, SW2 are respectively thrown to positions of terminals 52b, 54b according to an instruction of the microcomputer 26. Thus, output signals from video signal processing circuits 42, 44 are outputted through the picture tube 46 (2-screen output) via horizontal interleave circuits 48, 56. That is, a video signal of the CM is outputted on a major screen of the picture tube 46 and programs of other channels received by a tuner 18 are selected, e.g. every one second and outputted on the sub screen. When the CM is finished, a bilingual broadcast is outputted again on one screen.

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 television receiver for outputting, for example, a specific television signal or / and a plurality of television signals other than the specific television signal simultaneously or continuously. About the machine.

[0002]

2. Description of the Related Art In a conventional television receiver of this type, when outputting two screens, an audio signal of a main screen is demodulated by an audio multiplexing circuit and output from a speaker. on the other hand,
The audio signal of the sub-screen is demodulated by a monaural audio circuit and output from headphones.

[0003]

In this prior art, when the main screen is commercial, it is necessary to operate a remote controller or the like in order to know the program contents of another channel, and the operation is troublesome. SUMMARY OF THE INVENTION Therefore, a main object of the present invention is to provide a television receiver capable of easily knowing the program contents of another channel.

[0004]

SUMMARY OF THE INVENTION The present invention provides a receiving means for receiving a plurality of television signals including a specific television signal, a determining means for determining an attribute of an audio signal of the specific television signal, and a determining means. A television receiver including video output means for outputting one of a specific video corresponding to a specific television signal and a plurality of videos corresponding to a plurality of television signals according to a determination result of the means.

[0005]

The first receiving means of the television receiver receives a specific television signal, for example, a bilingual broadcast,
If the discriminating means determines that the audio signal has changed from bilingual to stereo while receiving a bilingual broadcast, that is, a commercial, the plurality of videos corresponding to the plurality of television signals received by the second receiving means will be displayed. Is output. In other words, in the second receiving means, the television signal of the channel other than the bilingual broadcast being received by the first receiving means is switched at predetermined intervals by the frequency switching means, and the video corresponding to each television signal is sequentially output. (Multi-scan). At this time, when an audio signal corresponding to the commercial video signal during the bilingual broadcast is output from the speaker and the audio signal is switched by the audio switching means,
An audio signal corresponding to the multi-scan video signal is output. Then, after the commercial ends, the bilingual broadcast is output again. If a broadcast station to be received by the second receiving means is selected in advance, it is possible to view the selected broadcast station during a commercial.

[0006]

According to the present invention, a commercial is detected based on the attribute of an audio signal, and when a commercial is received, a program of another channel received by another receiving means is displayed, so that the program contents of another channel can be easily known. be able to.
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0007]

Referring to FIG. 1, a television receiver 10 of this embodiment includes antennas 12 and 14, and tuners 16 and 18 are provided on the antennas 12 and 14, respectively.
Is connected. The high-frequency signal output from the tuner 16 is supplied to an intermediate frequency amplification (IF) circuit 20, and the intermediate frequency signal from the IF circuit 20 is supplied to a switch circuit 22. The high-frequency signal output from the tuner 18 is I
An intermediate frequency signal from the IF circuit 24 is supplied to the switch circuit 22. Switch circuit 22
Outputs an intermediate frequency signal from the IF circuit 20 to the audio multiplexing circuit 28 or the monaural audio circuit 30 in accordance with an instruction from the microcomputer 26. Further, the switch circuit 22 converts the intermediate frequency signal from the IF circuit 24 into an audio multiplexing circuit 28 or a monaural audio circuit 30 according to an instruction from the microcomputer 26.
Output to

The output signal (stereo signal) of the audio multiplexing circuit 28 and the output signal (monaural signal) of the monaural audio circuit 30 are provided to a switch circuit 32. The switch circuit 32 outputs an output signal of the audio multiplexing circuit 28 to the audio output circuit 34 or 36 according to an instruction from the microcomputer 26. The switch circuit 32 outputs an output signal from the monaural audio circuit 30 to the audio output 34 or 36 in accordance with an instruction from the microcomputer 26. And the audio output circuit 3
4 is output via a speaker 38, and the output signal of the audio output circuit 36 is output via a headphone 40.

The intermediate frequency signal from the IF circuit 20 is supplied to a video signal processing circuit 42, and the intermediate frequency signal from the IF circuit 24 is supplied to a video signal processing circuit 44. In the video signal processing circuit 42, known processes such as detection and amplification are performed, and video is output from the picture tube 46 via the switches SW1 and SW3. In the video signal processing circuit 44, the same processing as described above is performed, and the switch SW2
And an image is output from the picture tube 46 via the switch SW3. The switches SW1 to SW3 are switched in accordance with an instruction from the microcomputer 26. When the video output from the picture tube 46 is one screen, the video of the broadcasting station selected by the tuner 16 or 18 is switched by switching the switch SW3. You can watch. When the image output from the picture tube 46 has two screens, the switch SW1
And SW2 are switched to the terminals 52b and 54b, respectively. The output signal from the video signal processing circuit 42 is supplied to the picture tube 46 via the horizontal thinning circuit 48, and the output signal from the video signal processing circuit 44 is 50
To the picture tube 46.

For example, when a broadcast whose audio signal is a bilingual signal (bilingual) is viewed on one screen, the broadcast signal is supplied to a tuner 16 via an antenna 12, and a high frequency signal from the tuner 16 is output from the tuner 16. The signal is the IF circuit 2
0 is given. The intermediate frequency signal from the IF circuit 20 is supplied to the audio multiplexing circuit 28 via the switch circuit 22 and to the video signal processing circuit 42. The audio multiplexing circuit 28 performs predetermined processing on the intermediate frequency signal, and outputs the signal from the audio multiplexing circuit 28 to the switch circuit 3.
2 to the audio output circuit 34. An output signal (bilingual) of the audio output circuit 34 is output from the speaker 38. In the video signal processing circuit 42, well-known processing is performed as described above, and the switches SW1 and SW
An image is output from the picture tube 46 via 3. That is,
In accordance with the instruction from the microcomputer 26, the switch circuit 22
The output signal of the F circuit 20 is output to the audio multiplexing circuit 28. In the switch circuit 32, the output signal of the audio multiplexing circuit 28 is given to the audio output circuit 34. Switch SW
1 is connected to the terminal 52a, and the switch SW3 is connected to the terminal 5a.
6a. At this time, based on the signal from the audio multiplexing circuit 28, the microcomputer 26 determines that the audio signal currently being output is bilingual.

Here, when a commercial (CM) is viewed while the bilingual broadcast is being viewed, that is, when the audio signal changes from bilingual to stereo, the microcomputer 26 determines that the output signal of the audio multiplexing circuit 28 is stereo. In other words, if a commercial becomes a CM during bilingual broadcasting, it is output on two screens, a video signal of the CM is output on the main screen, and a broadcast of another channel selected by the tuner 18 is displayed on the sub-screen every second, for example. Switching is performed sequentially (multi-scan). At this time, the high frequency signal from the tuner 18 is given to the IF circuit 24, and the intermediate frequency signal from the IF circuit 24 is
The output signal from the monaural audio circuit 30 is supplied to the audio output circuit 36 via the switch circuit 32. That is, the output signal of the audio output circuit 36 is output from the headphones 40. Normally, since the headphones 40 are not connected to the television receiver 10, an audio signal corresponding to a multi-scan (sub-screen) image is inaudible to a viewer.

In the microcomputer 26, the audio multiplexing circuit 2
When it is determined that the audio signal to be output is stereo based on the output signal from the switch 8, the switch SW1 is switched to the terminal 52b, and the switch SW2 is switched to the terminal 54b.
Therefore, the output signal from the video signal processing circuit 42 is thinned out every other pixel in the horizontal direction by the horizontal thinning circuit 48,
The image is output to the picture tube 46. The intermediate frequency signal from the IF circuit 24 is supplied to a video signal processing circuit 44, and the output signal from the video signal processing circuit 44 is supplied to a horizontal thinning circuit 50 via a switch SW2. Horizontal thinning circuit 5
At 0, the output signal from the video signal processing circuit 44 is thinned out every other pixel in the horizontal direction and output to the picture tube 46.
Therefore, for example, when forming the main screen and the sub-screen as shown in FIG. 2, a CM video signal is output on the main screen, and a multi-scan video signal is output on the sub-screen.
At this time, an audio signal corresponding to the CM is output from the speaker 38. When audio switching is instructed by a remote control transmitter (not shown) or an operation panel (not shown) provided in the television receiver 10, the switch circuit 32 is switched in accordance with an instruction from the microcomputer 26. Therefore, the output signal from the monaural audio circuit 30 is provided to the audio output circuit 34, and the output signal from the audio multiplexing circuit 28 is provided to the audio output circuit 36. Therefore, by switching the audio, an audio signal corresponding to the multi-scan video signal can be output from the speaker 38. Here, when the CM ends and the bilingual broadcast is output again, the microcomputer 26 determines from the signal from the audio multiplexing circuit 28 that the audio signal is bilingual. Therefore, the microcomputer 26 switches the switch SW1 to the terminal 52a side. That is, the picture tube 46 outputs a video signal of a bilingual broadcast.

The operation described above is performed by the microcomputer 26 shown in FIG.
The processing is performed according to the flowchart shown in FIG. When the power of the television receiver 10 is turned on, the process is started, and it is determined in step S1 whether or not the commercial is a CM. If "NO" here, the process returns to the step S1, but if "YES", two screens are output in a step S3. Subsequently, in step S5, the audio signal of the CM is output from the speaker 38, and
In step 7, the sub-screen is multi-scanned. In step S9,
It is determined whether or not the CM has ended. If “YES”, bilingual broadcast is output on one screen in step S11, and the process returns to step S1. If “NO”, step S1 is performed.
At 3, it is determined whether or not there is a voice switching instruction. If "NO" here, the process returns to the step S7, but the "YE
If S ", the audio signal is switched in step S15,
That is, the switch circuit 32 is switched, and the process returns to step S7.

The television receiver 10 of the other embodiment shown in FIG. 4 is the same as the television receiver 10 of the embodiment of FIG. 1 except that the switch circuit 32 is omitted, and thus the duplicated description will be omitted. . In this television receiver 10, when two screens are output during a CM, the CM
Is output from the speaker 38, and the audio signal corresponding to the multi-scan is output from the headphones 40. That is, during the two-screen output, the video of the CM on the main screen and the sound corresponding to the CM are output from the speaker 38, and only the video can be viewed in the multi-scan of the sub-screen.

The microcomputer 26 performs the above-described operation in FIG.
The processing is performed in accordance with the flowchart shown in FIG. 3, and the processing in steps S11 and S13 in the flowchart shown in FIG.
If "NO" in 9, the process returns to step S7. That is,
It does not switch audio signals. A television receiver 10 of another embodiment is shown in FIG. 6. In the television receiver 10 shown in FIG. 4, the monaural audio circuit 30 is replaced with an audio multiplexing circuit 60, and an output signal from the audio multiplexing circuit 60 to the microcomputer 26 is output. The description is the same except for the addition of the line, and a duplicate description will be omitted. In the television receiver 10, it is assumed that the tuner 16 receives bilingual broadcasting and the tuner 18 receives, for example, a professional baseball broadcast. In other words, if you become a CM while watching a bilingual broadcast,
CM and professional baseball broadcasts are output on two screens,
In the switch circuit 22, the output signal of the IF circuit 24 is given to the audio multiplexing circuit 28 in accordance with the instruction of FIG.
Is output from the audio multiplexing circuit 6 via the switch circuit 22.
0 is given. That is, when the bilingual broadcast becomes a CM, an audio signal corresponding to the professional baseball broadcast is output from the speaker 38. Also, when an instruction to switch the audio signal is given by the remote control transmitter or the operation panel during the two-screen output, by switching the switch circuit 22, the CM is switched.
Can be output from the speaker 38.

The microcomputer 26 performs the above operation in FIG.
In this case, in step S5, a professional baseball relay audio signal is output, and in step S7, a professional baseball relay video signal is output on the sub-screen. According to these embodiments, when the television signal is determined to be CM (bilingual), the television signal received by the other tuner 18 is displayed on the screen, so that the program contents of another channel can be easily known. Further, when outputting an audio signal corresponding to a television signal received by another tuner 18, it is possible to know program contents in more detail.

It should be noted that in these embodiments, 2
Although the image is output on the screen, an image corresponding to a television signal received by another tuner 18 may be output from the picture tube 46. In addition, the image of the other tuner 18 is multi-scanned in the CM, but may be divided into multiple screens and displayed.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is an illustrative view showing a two-screen display displayed on the picture tube shown in FIG. 1 embodiment;

FIG. 3 is a flowchart showing a part of the processing of the microcomputer shown in FIG. 1 embodiment;

FIG. 4 is an illustrative view showing another embodiment of the present invention;

FIG. 5 is a flowchart showing a part of the processing of the microcomputer shown in the embodiment in FIG. 4;

FIG. 6 is an illustrative view showing another embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Television receiver 22, 32 ... Switch circuit 26 ... Microcomputer 28, 60 ... Audio multiplexing circuit 30 ... Monaural audio circuit 48, 50 ... Horizontal thinning circuit

Claims (6)

[Claims] A receiving means for receiving a plurality of television signals including a specific television signal; a determining means for determining an attribute of an audio signal of the specific television signal; And a video output means for outputting one of a specific video corresponding to the specific television signal and a plurality of video corresponding to the plurality of television signals. 2. The receiving means according to claim 1, wherein said receiving means includes a first receiving means for receiving said specific television signal, and a second receiving means for receiving any one signal other than said specific television signal. The television receiver as described. 3. The apparatus according to claim 2, further comprising frequency switching means for switching the reception frequency of said second receiving means at predetermined time intervals when said video output means outputs said plurality of videos.
The television receiver as described. 4. The second receiving means receives a television signal selected in advance, and the video output means outputs one of the specific video and the video corresponding to the selected television signal in accordance with the result of the determination. The television receiver according to claim 3, wherein the television receiver outputs. 5. An audio output means for outputting any one of a plurality of sounds corresponding to the plurality of television signals, and an instruction from an operator for outputting sounds from the sound output means when outputting the plurality of videos. The television receiver according to any one of claims 1 to 4, further comprising an audio switching unit that switches according to the following. 6. The television receiver according to claim 5, wherein when the attribute is stereo, the video output means outputs the plurality of videos.