KR960027113A - Wireless transmission device of video signal that can mix microphone sound - Google Patents

Abstract

The present invention relates to a wired / wireless transmission device for video signals, and inputs a separate microphone sound to a video signal and an audio signal reproduced in a VTR, mixes it with a microphone sound and an audio sound reproduced in a VTR, and then wirelessly transmits to a TV within a certain distance. By sending video signals, video signals and audio signals played back on a videotape can be viewed through a TV and a monitor connected by wire in the VTR. If you sing while playing a karaoke tape, the TV shows the video as captions, but the singing microphone is not mixed with the accompaniment. Except for the TV connected to the VTR, the video signal played back on the VTR could not be seen as an image, and when the TV broadcasted on the VTR was being watched, the playback screen of the VTR could not be viewed on another TV.

According to the present invention, a video signal played on a VTR can be directly or mixed with a microphone sound to be transmitted by wire or wireless, and the play screen of the VTR can be simultaneously watched on a plurality of TVs. Other TVs can also watch the playback screen of the VTR. In addition, it is a wired / wireless transmission device for video signals that can be monitored by a TV by connecting a surveillance camera to an external video input jack.

Description

Wireless transmission device of video signal that can mix microphone sound

Since this is an open matter, no full text was included.

1 is an external view of the present invention, (a) is a front view, (b) is a rear view, and FIG. 2 is a circuit diagram of the present invention.

Claims (1)

The video video signal input through the video input jack V-IN is applied to the modulators 2 and 3, respectively, directly or via the video signal amplifier 1, and the microphone jacks M-1 and M. -2) the microphone sound selectively input through the low frequency amplification and mixing unit 5 is input through the audio input jack (A-IN) to pass through the audio signal and the low frequency amplification and mixing unit 4 The mixed signal is applied to the two modulators (2) and (3) through the 4.5 MHZ audio modulator (6) while the volume is displayed on the level display section (9) via the level drive section (8). In the modulator 2, which receives the VHF channel carrier selectively from the VHF oscillator 10 by the switch 19, the modulated signal, which is modulated to the video signal and the audio signal, via the messaging unit 11 through the VHF terminal 12 UHF power generation unit 4 to be output by wire, and selectively operated by the three-stage switch (19) In the modulator 3 receiving the carrier wave of the UHF channel with the fine tuned frequency 13, the UHF antenna 17 is converted into a video signal and an audio signal through the high frequency amplification 15 and the high frequency output amplifier 16. ), And outputs wirelessly through the three-stage switch (19) to watch the VHF channel and UHF channel respectively or simultaneously, and connects the surveillance video camera to the external video signal input jack (EV-IN). Wired and wireless transmission of video signals capable of mixing microphone sound for the purpose of monitoring, recording or recording. ※ Note: The disclosure is based on the initial application.