JPH0454076A - tv receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio signal processing circuit for a television receiver or the like having a multi-screen display function.

[Prior art]

FIG. 2 shows a stereo surround system using main audio left and right speakers (SP) L and R, and surround left and right speakers L S+ R, using a normal audio signal processing circuit 5. FIG. 3 shows the case of a television receiver having a multi-screen display function, in which the multi-screen reception tuner sections 1a, 1b, 1
The video signals of c output are respectively sent to video signal processing circuit 2a.
, 2b, 2c, 2d and a multi-screen display signal processing circuit 3 drive a picture tube (CRT), and the audio signals output from the tuner sections 1a, 1b, 1c are input to an input selector switch 4. One system of audio signals is selected from a plurality of screens, and the audio signal is driven through the audio signal processing circuit 6. Therefore, if the sounds for multiple screens displayed on a picture tube are simply synthesized, the multiple sounds will be mixed and cannot be listened to at the same time.

[Problem to be solved by the invention]

The present invention has been made in view of the conventional example, and an object of the present invention is to simultaneously separate and output audio corresponding to the plurality of screens from a plurality of speakers when displaying the plurality of screens in a television receiver having a multiscreen display function.

[Means to solve the problem]

The present invention provides a switch circuit for selecting an audio signal output from a tuner unit for multiple screens, and a plurality of switch circuits for selecting an output stereo/surround audio signal processing circuit and a monaural audio signal processing circuit for each output audio signal from the same tuner unit. The feature is that it is allocated to the left and right main speakers and the left and right surround speakers.

[Effect]

As shown in FIG. 1, a tuner section 1a for multiple screen display
, 1b, 1c, 1d output video signals are sent to video signal processing circuits 2a, 2b, 2c, 2, respectively.
d and the picture tube C via the multi-screen display signal processing circuit 3.
Drive RT. On the other hand, the audio signal system includes audio signal processing circuits 6 a, 6 b, which output monaural audio signals, respectively.
It consists of an audio signal processing circuit 5 that outputs a stereo surround audio signal according to the selection of 6c, 6d and an input selector switch 4, and an output selector switch 7, and can support multiple screens by switching the switch 7 in the ↓B direction. The resulting sounds are simultaneously separated and output from speakers (SP) L, R, LS, and R3.

〔Example〕

1a, 1b, 1c, and 1d shown in FIG. 1 are a plurality of tuner sections that output video signals and audio signals constituting a plurality of screens, and 2a, 2b, 2c, and 2d are tuner sections 1a+1b, 1. c, 1 d video signal processing circuit consisting of Y/C separation of output video signal system, video amplification, color signal regeneration circuit, etc. 3 is the same video signal processing circuit 2 a, 2
This is a multi-screen display signal processing circuit that synthesizes the single-screen signals of outputs b, 2c, and 2d and outputs it as a video signal for display on a picture tube CRT. The audio signal system changeover switch 4 is the tuner section 1a, 1b, 1c, 1d.
The output audio signal is selected and connected to an audio signal processing circuit 5 which includes an audio multiplexing demodulation circuit, a volume tone quality adjustment circuit, a low frequency amplification circuit, etc., and outputs the audio signal as a stereo surround signal. Furthermore, the tuner sections 1 a, 1 b, 1
c, 1d are connected to audio signal processing circuits 6a+6b, 6c, 6d consisting of a volume adjustment circuit, low frequency amplification circuit, etc., which output the output audio signal as a monaural signal. 7 selects the monaural audio signal output from the audio signal processing circuits 16a, 6b, 6c, and 6d and the stereo surround audio signal output from the audio signal processing circuit 5, and outputs the speaker (SP).
L, R.

For example, when reproducing a single screen of the tuner section 1b, switch 4 is switched to the terminal side to select the single screen audio signal, and further, Switch the switch 7 in the ↑A" direction to select the stereo surround sound output from the audio signal processing circuit 5. In this case, although not shown in the figure, it is also possible to set the mode to stereo or monaural mode. Tuner section In the case of multiple screens with 1a, 1b+1c, 1d, switch 7 to the ↓B force direction and output the audio signal processing circuits 6a, 6b.

6 c, 6 d Select the output monaural audio, and tuner section compatible with multiple screens 1 a, 1 b, 1 c, 1
The audio of d is separately output from the main audio speakers L and R and the surround speakers L S+ R, respectively. Although not shown in the figure, it is also possible to add a tuner section to create multiple screens. Although not shown in the figure, there is also switching between the audio signal processing circuits 6a, 6b, 6c, and 6d corresponding to multiple screens, or the same audio signal processing circuits 6a+6b.

It is also possible to select the output main audio and subprogram audio by adjusting the volume in 6c and 6d. For example, 2
Audio signal processing circuits 6a, 6b,
There are a plurality of combinations in which the sound of a counterprogram that is not displayed on the screen is output from the audio signal processing circuit 6c or 6d.

〔Effect of the invention〕

As described above, the present invention selects the stereo/surround audio signal processing circuit output from the switch circuit that selects the multi-screen tuner output audio signal and the monaural audio signal processing circuit for each of the tuner output audio signals. By allocating a plurality of switch circuits to the left and right speakers for main audio and the left and right surround speakers, it is possible to listen to sounds from multiple screens simultaneously and in a separate state. It is also possible to output the sound of a counterprogram.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a circuit for simultaneously outputting audio from multiple screens showing an embodiment of the present invention, and FIGS. 2 and 3 are block diagrams of conventional audio output. 18 to 1d are tuner sections, 28 to 2d are video signal processing circuits, 3 is a multi-screen signal processing circuit, 5 is a stereo/surround audio signal processing circuit, and 68 to 6d are monaural audio signal processing circuits. Patent applicant: Fujitsu General Ltd.

Claims (2)

[Claims] (1) In a television receiver or the like that has a multi-screen display function, connect the video signals output from multiple tuners to the corresponding video signal processing circuits, and connect the video signal processing circuit outputs to the multi-screen display signal processing circuit. The audio signals output from the tuner section are connected to the respective terminals of the first input selector switch and the corresponding monaural audio signal processing circuit, and the audio signal processing circuit for monaural The second output of the multiple circuit configuration for speaker circuit output
The common terminal output of the first changeover switch is connected to one terminal side of the changeover switch, and the common terminal output of the first changeover switch is connected to a stereo/surround audio signal processing circuit, and the output of the same audio signal processing circuit is connected to one terminal side of the second changeover switch. What is claimed is: 1. A television receiver, which is connected to the other terminal side and allows simultaneous listening to audio from a plurality of screens formed by connecting each common terminal output of the second changeover switch to a plurality of corresponding speakers. (2) Claim (1) wherein the sound of a counterprogram is outputted by selecting the monaural audio signal processing circuit compatible with the plurality of screens.
) TV receiver as described.