JPH08251502A - Television receiver - Google Patents

Abstract

PURPOSE: To eliminate troubles that sound signal is not in matching with a video image by supplying automatically sound signal of a video image to a main screen when a multi-pattern video signal is displayed as a sub-image screen. CONSTITUTION: A control section 9 detects the mode that a character broadcast signal is displayed as a sub-pattern, and gives a control signal to a changeover section 13 to select sound signal of a main screen. That is, the mode is transited to mode displaying characters of a character broadcast on a sub-screen and the characters of the character broadcast are displayed on the sub-screen to discriminate whether the sound signal is a signal for the main screen or the sub-screen. When the sound signal of the sub-screen in outputted, since a sound signal independently of the video image of the main screen is outputted, a control signal is fed to the changeover section 13 to allow it to select the sound signal (position of SIF 1) of the main screen. Furthermore, when the sound signal (position of SIF 1) of the main screen is outputted, the sound signal is not switched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver capable of dividing a plurality of images into a single display device and displaying them simultaneously.

[0002]

2. Description of the Related Art In a conventional television receiver, when viewing two different signals on one screen, generally, a PIP (Picture In Picture) function is used.
A television having such a function, which is displayed by superimposing another screen (hereinafter, referred to as a sub screen) that is compressed to a small size (for example, 1/9) on a normal screen (hereinafter, referred to as a main screen). Many receivers are sold.

In the case of these television receivers, the sound output from the speaker is generally the sound of a large main screen, and the sound of the sub-screen is not output or is output only for the earphone. The screen sound is not output from the speaker.

This is because the relationship between the main screen and the sub-screen is a master-slave relationship in view of the size of the screen and the like, and if a small sub-screen sound is output from the speaker, the user may be confused. is there.

However, in the case of a dual-screen television receiver which can be viewed in substantially the same size as the left and right, instead of the conventional PIP function, even if the left and right signal processing systems are different, the size displayed on the screen is large. The same applies to the left and right sides, and the idea of outputting audio from the main screen as in the conventional PIP screen is no longer applicable.

Therefore, in the dual screen television receiver, the sound can be output from the speaker on both the main screen and the sub screen. This selection is left to the user. For example, a main / sub audio switching signal can be sent from the operation unit to the television receiver to immediately switch the main / sub audio. For example, this switching is performed by a microprocessor or the like in the television receiver, and as shown in FIG. 7, the software determines whether the screen is the main screen or the sub screen, and switches the audio output alternately.

In such a dual television receiver, the image of the desired station can be enjoyed from the main screen and the sub screen, and the channel search screen or the character portion of the teletext can be displayed from the sub screen.

[0008] In the channel search, the reduced image of each station is divided and multi-screen display is performed, and in the character broadcasting, the character signal portion is extracted and output from the sub-screen.

When performing multi-screen display from the sub-screen, if the audio output is the audio signal of the sub-screen side, the video of each broadcasting station is repeatedly received, so the audio signal of each station is intermittently output from the speaker. Will be done. In the channel search, it is sufficient to obtain the back program information, there is no need to output the audio, and even if the audio is output, the switching of the audio at short intervals may be uncomfortable for the user.

Further, when the character signal is extracted and displayed from the sub-screen, if the voice output is not switched to the first tuner side, the voice signal of the station received by the second tuner is the speaker. Will be output from. For this reason, when the audio output is switched to the sub screen side, there occurs a problem that an audio different from the video on the main screen is output.

[0011]

In the television receiver as described above, it is usually possible to switch the audio output from the speaker with respect to the signals of the main and sub screens, but the sub screen has a special purpose. In this case, depending on the combination of the speaker output selection and the screen function selection, there is a problem in that a sound unrelated to the screen is output or a sound unnecessary for the function is output.

The present invention has been made in view of the above problems, and when a sound irrelevant to the screen is output or a sound which is considered unnecessary for the user is output, the speaker is used. The purpose is to prevent the above-mentioned problems by automatically switching the output audio signal to a regular signal.

[0013]

A television receiver according to the present invention according to claim 1 is a television receiver capable of simultaneously displaying a main screen and a sub-screen at substantially the same size. A first video signal processing means for generating a video signal for a screen and a tuner are included, and one of signals from a plurality of broadcasting stations is selected to generate a video signal for a sub-screen, or a plurality of video signals is generated. Second video signal processing means capable of sequentially selecting signals of broadcasting stations in a time division manner, reducing and dividing the signals to generate a multi-screen video signal for the sub-screen, and displaying the main screen or the sub-screen. When the switching means for selectively supplying the audio signal of the video to the speaker and the multi-screen video signal as the sub-screen are displayed, the audio signal of the video displayed on the main screen is automatically changed. The switching means for supplying to the speaker Those characterized by comprising control means for controlling, the.

The television receiver according to claim 2 is
A television receiver capable of displaying a main screen and a sub screen at approximately the same size at the same time, including a tuner, and selecting one of signals from a plurality of broadcasting stations to select a main screen image. First video signal processing means for generating a signal, second video signal processing means for generating the video signal for the sub-screen, and reception processing of a teletext signal included in the signal selected by the tuner. A teletext processing means, a display selection means for selectively displaying, as the sub-screen, a video signal from the second video signal processing means or a teletext signal from the teletext processing means; Switching means for selectively supplying the audio signal of the video displayed on the main screen or the sub screen to the speaker, and when the teletext signal is displayed as the sub screen, the main screen is automatically displayed. Displayed To supply the audio signal of the image to the speaker and is characterized by comprising a control means for controlling said switching means.

[0015]

According to the present invention, when the special display (multi-screen display or character display) is performed from the sub-screen, the audio signal of the station on the main screen side can always be output as a sound.

[0016]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is an embodiment of a television receiver according to the present invention. As shown in FIG. 1, such a television receiver includes two tuners 1 and 2, and these tuners 1 and 2 include a control unit 9 (for example, a microprocessor).
The video of the desired station can be selected according to the signal from.

At the first tuner 1, an intermediate frequency (hereinafter, P
The PIF1 signal converted to the IF) is supplied to the video signal processing unit (hereinafter referred to as the V / C / D unit) 3, and the PIF2 signal converted by the second tuner 2 is supplied to the sub-screen processing unit 4. ing. In order to distinguish it from the signal of the intermediate frequency band of the audio signal described later, the signal of the image intermediate frequency band is
The first letter of the is taken as PIF, and the signal of the sound intermediate frequency band is
The initial of Sonic is taken and it is set as SIF.

The V / C / D section 3 is composed of an LSI including a Y / C separation section, a synchronization separation section, a deflection section, etc. For the sake of simplicity, in the block diagram of FIG. D part 3
Is shown as. The signal from the sync separation unit in the V / C / D unit 3 is supplied to the sub-screen processing unit 4 in addition to the deflection unit so that the main screen side and the sub-screen side operate in synchronization. is there.

The V / C / D section 3 is provided with a compression section 5 so that the selected video can be displayed on two screens. When displaying on one screen, this section is bypassed. is there.

When displaying on two screens, the sub-screen processing unit 4
The compression unit 5 compresses the signals so that the horizontal direction is halved, the addition unit 6 combines the signals, and the output from the display unit 10. Therefore, the video can be displayed from the main screen X and the sub-screen Y as shown in FIG. When displaying on a single screen, the signal from the first tuner 1 is sent to the display unit 10 without passing through the compression unit 5.
it's shown. The main screen X is displayed from the left side of the normal display unit, and the sub screen Y is displayed from the right side.

Further, the teletext processing section 8 is arranged so as to bypass the V / C / D section 3 in the path for processing the PIF1 signal.
Is provided, and the character signal superimposed on the video signal is demodulated in this portion. The demodulated signals are added by the addition unit 7, and the display unit 1 is based on the signal from the control unit 9.
It can be displayed from 0. It should be noted that the teletext processing unit 8 is supplied with horizontal / vertical synchronization signals so as to operate in synchronization with the V / C / D unit 3 so that only the text information can be displayed from the sub-screen Y. is there.

The signals PIF1 and PIF2 converted by the first and second tuners 1 and 2 are supplied to audio intermediate frequency processing units (hereinafter referred to as SIF processing units) 11 and 12, respectively, and the SIF processing units are supplied. At 11 and 12, the audio signal is subjected to signal processing. In this portion, for example, the difference between the intermediate frequency bands is used, and the video signal and the audio signal are separated by filtering. Further, after performing signal processing on the audio signal, the signal is supplied to the switching unit 13, and the audio signal on the main screen side or the sub screen side is output as a sound from the speaker 15. In addition, a sufficient amplitude is obtained in the amplifier 14,
The sound is surely output from the speaker 15.

A switching signal from the control unit 9 is supplied to the switching unit 13 so that the audio signal on the main screen side or the sub screen side can be selected and output.

A signal from an operating section (not shown) as an input means is supplied to the control section 9, and a tuning signal is supplied to the first and second tuners 1 and 2 in accordance with an instruction from the operating section. Is configured to supply. Also, V / C / D is
An acronym for Video, Color, Deflection.

The operation of FIG. 1 will be described. First, in the two-screen mode, the image of a predetermined station is displayed from the main screen X, and the sub-screen Y is displayed.
The case of displaying a teletext from will be described.

In this case, only the character portion is extracted from the character broadcast signal and displayed from the sub-screen Y. At this time, if the switching unit 13 is switched to the sub screen side, the sound of the station selected by the second tuner 2 is output from the speaker 15 even though the image from the second tuner is not displayed. Will end up.

The applicant of the present invention detects that the sub-screen is in the mode in which the teletext signal is displayed, by the control unit 9, supplies the control signal to the switching unit 13, and switches the sound to the main screen side. Improved.

Hereinafter, description will be made with reference to the flowchart of FIG. In step 1, the mode shifts from the sub-screen Y to the mode for displaying the character portion of the teletext. At this time step 2
At, the character portion of the teletext is displayed from the sub-screen Y, and it is determined whether it is the sound on the main screen side or the sound on the sub-screen side. When the sub-screen sound is output, a sound unrelated to the main screen video is output, so a control signal is sent to the switching unit 13 to switch to the main screen sound (SIF1 side). (Step 3).
Further, when the main screen side sound (SIF1 side) is output (step 2), the sound is left as it is without switching. With such a configuration, it is possible to automatically select the audio that matches the video without bothering the user.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the case where the search screen is displayed on the sub screen is shown. The configuration is the same as that of FIG. 1 except that the character generating unit 1 is not provided, and the same reference numerals are given to the same components as those of FIG. 1 and description will be added.

The sub-screen processing section 4A of this embodiment is provided with a multi-screen generating section (not shown), and based on a signal from the control section 9, the sub-screen Y to the search screen as shown in FIG. Can be displayed. This multi-screen display is generally called a search mode and is used when selecting a channel while watching a back program.

The multi-screen generator (not shown) is provided with a video memory (not shown), and in the search mode, the video signals of the receivable broadcast stations are horizontally and vertically compressed and sequentially stored in the video memory. I remember. In this portion, the data is stored for each station, and each time the storage of one station is completed, a signal notifying the end of writing is supplied to the control unit, for example, the microprocessor 9, so that the next station is written. There is. Repeating this operation, all the video signals of each broadcasting station,
Store in video memory. The stored video signal is read at a clock frequency synchronized with the horizontal and vertical synchronizing signals and supplied to the adding unit 6.

The operation of FIG. 4 will be described. First, in the two-screen mode, the image of a predetermined station is displayed from the main screen X, and the sub-screen Y is displayed.
The case of displaying the search screen from will be described.

In this case, the image from the multi-screen generating section in the sub-screen processing section 4A is displayed. At this time, if the switching unit 13 is switched to the screen on the left side, the voice is interrupted because of the search mode. The applicant is
The control unit 9 detects that the sub screen is in the search screen mode and supplies a control signal to the switching unit 13 to switch the voice to the main screen.

Description will be made with reference to the flowchart of FIG. In step 1, in accordance with an instruction from the operation unit, the sub-screen Y shifts to a mode for displaying a search screen. At this time, in step 2, multiple screens are displayed from the sub-screen Y, and it is determined whether the audio is the audio on the main screen side or the audio on the sub-screen side. When the sub-screen sound is output, a sound unrelated to the main screen video is output, so a control signal is sent to the switching unit 13 to switch to the main screen sound (SIF1 side). (Step 3). Further, when the main screen side sound (SIF1 side) is output (step 2), the sound is left as it is without switching.

With such a structure, it is possible to automatically select the audio that matches the video without bothering the user. Further, when the image of the predetermined station is displayed from the sub-screen Y, the processing as shown in FIG. 7 is performed so that the audio output on the main screen side or the sub-screen side can be alternately switched by the instruction from the operation unit. I am doing it.

Therefore, the screen can be selected from the operation unit as in the conventional case, and when a special screen is displayed on the sub screen, the voice is automatically switched to the main screen side, so that comfortable operability can be obtained.

In the above-mentioned embodiments, the structure for displaying the characters or the search screen from the sub-screen has been described as a separate structure. However, the structures of both embodiments are applicable to a television receiver including both. Needless to say.

In this embodiment, the case where the left and right screens are substantially the same is described, but the present invention is not limited to this, and any television receiver can be used as long as it has two screens. Needless to say, it is applied.

Further, instead of the output of the second tuner 2 in the embodiment of FIG. 1 or the first tuner 1 in the embodiment of FIG. 4, a signal output from another video source such as a VTR may be used. It is possible.

[0040]

As described above, according to the present invention described in the claims, even if a special screen (search screen or character screen) is displayed from the sub-screen, the problem that the sound is different from the video is eliminated. In addition, it is not necessary to instruct and switch to the voice on the main screen side every time a special screen is displayed from the sub screen.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a television receiver according to the present invention.

FIG. 2 is a diagram for explaining a main screen and a sub screen.

FIG. 3 is a flowchart for explaining the operation of the switching unit in FIG.

FIG. 4 is a block diagram showing another embodiment of the television receiver according to the present invention.

FIG. 5 is a diagram for explaining a main screen and a sub screen.

6 is a flowchart for explaining the operation of the switching unit in FIG.

FIG. 7 is a diagram showing a conventional voice switching procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st tuner 2 ... 2nd tuner 3 ... V / C / D part 4 ... Sub-screen processing part 5 ... Compression part 9 ... Control part 11, 12 ... SIF processing part 13 ... Switching part 14 ... Amplification part 15 … Speaker

Claims (2)

[Claims] 1. A television receiver capable of simultaneously displaying a main screen and a sub-screen in substantially the same size, comprising a first video signal processing means for generating a video signal for the main screen, and a tuner. Including, select one of the signals from multiple broadcasting stations to generate the sub-screen video signal, or select the signals of multiple broadcasting stations sequentially in a time-divisional manner and reduce and divide them. Second video signal processing means capable of generating a multi-screen video signal for the sub-screen, and switching means for selectively supplying the audio signal of the video displayed on the main screen or the sub-screen to the speaker, When the multi-screen video signal is displayed as the sub-screen, the control means controls the switching means so as to automatically supply the audio signal of the video displayed on the main screen to the speaker. Television reception characterized by Machine. 2. A television receiver capable of simultaneously displaying a main screen and a sub screen in substantially the same size, including a tuner, and selecting any one of signals from a plurality of broadcasting stations. A first video signal processing means for generating a main screen video signal, a second video signal processing means for generating the sub screen video signal, and a character included in the signal selected by the tuner. A teletext processing means for receiving and processing a broadcast signal, and a display for selectively displaying, as the sub-screen, a video signal from the second video signal processing means or a teletext signal from the teletext processing means. Selecting means, switching means for selectively supplying the audio signal of the video displayed on the main screen or the sub screen to the speaker, and when the teletext signal is displayed on the sub screen, Mainly The audio signal of the displayed image on the surface to be supplied to the speaker, a television receiver, characterized by comprising a control means for controlling said switching means.