KR920009377B1 - Apparatus for transmitting/receiving between autio and video system - Google Patents

Abstract

a first signal convertor connected to the audio output terminal of video and converting the inputted audio signal into the digital signal; a first oscillator generating the specific frequency; a mixer combining the two signals; a first audio transmission section connected to the back side of the mixer; a second convertor connected to the video output terminal of video and converting the inputted video signal into the digital signal; a second oscillator generating the specific frequency; a second mixer and transmission sect.; a first receiver receiving the transmitted audio signal; a first detector detecting the digital signal; a D/A convertor converting the digital signal.

Description

Transceiver between audio and video equipment

1 is a block diagram of a transceiver between an audio and video device according to the present invention.

* Explanation of symbols for the main parts of the drawings

10-1: first converter 10-2: second converter

20-1: first oscillator 20-2: second oscillator

30-1: first transmitter 30-2: second transmitter

40-1: First Receiver 40-2: Second Receiver

50-1: first detector 50-2: second detector

100: audio transmission circuit 200: video transmission circuit

300: audio receiving circuit 400: video receiving circuit

1000: transmitting circuit 2000: receiving circuit

AB: Audio Buffer VB: Video Wideband Buffer

AD1, AD2: A / D Converter FD: Free Driver

WFD: Broadband Predriver VR, VR2: Variable Resistor

OS1, OS2, OS3, OS4: Oscillator M1, M2: Mixer

AP1, AP2: Amplifier I1: IR Diode

PD1: Photodiode EAP1, EAP2: Equalizing Amplifier

DE1, DE2: Detector D / A1, D / A2: D / A Converter

The present invention relates to audio and video equipment, and more particularly, to a transmission and reception device between video and audio equipment for wirelessly connecting audio and video equipment periods.

In general, in the case of audio equipment, the audio main body and the speaker can be produced integrally, and can be used, but the sound output from the speaker differs depending on the position of the speaker so that the speaker can be adjusted according to the user's preference It is produced by connecting main body and speaker by wire.

In addition, it is more effective to produce and use video and TV as a whole, but in this case, the price becomes high, so that TV and video are produced and sold separately and the wires are interconnected. It is common to produce them by connecting them.

However, when the audio and video periods are connected by wires, aesthetic problems due to the exposure of the wires for connecting them, and when these devices are far apart from each other, require a very long wire and economic problems occur.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a wireless transceiver between audio and video which enables wireless connection between audio and video equipment. This object can be achieved with an IR diode for transmitting an audio signal or a video signal in infrared and a photo diode for receiving an infrared signal transmitted from the IR diode.

A feature of the present invention for achieving this object is a first signal converter for converting an input audio signal into a digital signal and outputting it, a first oscillator for generating a specific frequency, and between the signal converter and the first oscillator Audio transmission means connected to a mixer configured to mix the digital signal of the first signal converter to the signal oscillated by the first oscillator, and a first transmitter to transmit the mixed signal from the mixer; A second signal converter for converting an input video signal into a digital signal, a second oscillator capable of oscillating with a variable frequency, and a second signal converter connected to the second signal converter and the second oscillator A mixer for mixing the signal with the signal oscillated by the second oscillator, a second transmitter connected to the mixer and transmitting the mixed signal in the mixer; A transmission circuit comprising: a first receiver for receiving a transmitted audio signal, a first detector for detecting a digital signal among signals received at the first receiver at a frequency coupled and oscillated at the first receiver, and the first receiver; A D / A converter connected to the detector for converting the digital signal of the first detector into an analog signal; A second receiver for receiving a transmitted video signal, a second detector for detecting a digital signal among signals received at the second receiver at a frequency oscillated in connection with the second receiver, and a second detector connected to the second detector A D / A converter for converting the digital signal of the two detectors into an analog signal; It is a transceiver between audio and video equipment composed of receiving circuit consisting of: Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram for carrying out the present invention, which includes a transmitting circuit 1000 connected to a video device or an audio device for transmitting an audio signal and a video signal, and a receiving circuit for receiving the transmitted audio signal and a video signal ( 2000). Specifically, the transmission circuit 1000 for transmitting the audio signal and the video signal includes a first signal converter 10-1, a first oscillator 20-1, a mixer M1, and a first transmitter 30-. 1) an audio transmission circuit (00), a video transmission comprising a second signal converter (10-2), a second oscillator (20-2), a mixer (M2), and a second transmitter (30-2). It consists of a video signal transmission circuit 200 made of Hiro 200.

The receiving circuit 2000 for receiving the transmitted audio signal and the video signal includes an audio receiving circuit including a first receiver 40-1, a first detector 50-1, and a D / A converter D / A1. 300, and a video receiving circuit 400 comprising a second receiver 40-2, a second detector 50-2, and a D / A converter D / A2.

In more detail, the audio transmission circuit 100 may further include: an audio buffer for converting an audio signal output from a video device or the like into a digital signal and outputting the digital signal. Connect (AB) to the audio output terminal (A) of the video. The first signal converter 10-1 connects the audio buffer BF to an A / D (A / D1) for converting an analog signal into a digital signal, and the A / D converter (A / D1). Connects to a predriver FD that shapes the waveform of the signal being applied. The first oscillator 20-1 capable of varying the frequency and outputting the oscillator OS1 having a predetermined frequency is connected to a variable resistor VR1 capable of adjusting the oscillation frequency of the oscillator OS1. .

The first signal converter 10-1 and the first oscillator 20-1 are connected to a mixer M1 for mixing the applied signals. The first transmitter 30-1, which is connected to the mixer M1 and transmits an applied signal, connects an AR diode ID1 that emits an infrared ray of a signal applied to an amplifier AP1 that amplifies the applied signal. Is done. The video transmission circuit 200 is formed in the same manner as the audio transmission circuit 200. However, since the video signal has a wider bandwidth than the audio signal, the audio buffer AB and the predriver FD are replaced by the video wideband buffer VB. ) And wideband predriver (WFD). In more detail, the audio receiver circuit 300 may perform waveform shaping of a signal applied to the port diode PD1 receiving the transmitted infrared signal. This is achieved by connecting an equalizing amplifier (EAP1) to amplify.

The first detector 50-1 connected to the first receiver 40-1 to detect a digital signal among the signals is a digital signal among signals applied by using a signal applied with an oscillator OS3 that oscillates a predetermined frequency. It is connected to the first detector DE1 for detecting a signal. The audio receiver circuit 300 is connected to a first D / A converter D / A1 for converting a digital signal applied to the first detector 50-1 into an analog signal. The D / A converter D / A1 is connected to an audio signal input terminal AI.

The video receiving circuit 400 is formed in the same manner as the audio receiving circuit 300 and connected to the video signal input terminal VI. The connection device between the audio and video apparatus of the present invention configured as described above includes an audio buffer (AB) and an audio and video signal applied from the audio terminal (A) and the video terminal (V) of the audio signal and the video transmission circuit (1000). After the waveform is shaped in the video optical buffer VB, the A / D converters A / D1 and A / D2 convert the waveform into a digital signal.

The audio and video signals converted into digital signals by the A / D converters A / D1 and A / D2 are again waveform-formed by the pre-driver FD and the wide-band pre-driver WFD, and the mixer M1 at the rear stage. ) And (M2).

In this case, the mixers M1 and M2 are connected to oscillators OS1 and OS2 for converting and outputting frequencies generated by the variable resistors VR1 and VR2. M2) forms a carrier by mixing audio and video signals converted into digital signals applied from the predriver FD and the wideband predriver WFD, and predetermined frequencies applied from the oscillators OS1 and OS2. .

Since the carrier waves output from the mixers M1 and M2 are amplified by the amplifiers AP1 and AP2 and then applied to the IR diodes ID1 and ID2, the IR diodes ID1 and IR2 Infrared light is emitted according to the carrier to transmit audio and video signals output from the audio and video output terminals (A) and (V). That is, the transmitting circuit 1000 converts the audio and video signals outputted from the audio and video output terminals A and V into digital signals, mixes them with a predetermined frequency signal to form a carrier wave, and then converts the carrier wave into an IR diode ( It is applied to ID1) and (ID2) and transmitted by infrared rays.

In addition, the audio and video signals transmitted in the infrared from the transmitting circuit 1000 are received by the photodiodes PD1 and PD2 of the receiving circuit 2000, and the signals received by the photodiodes PD1 and PD2. Since the noise is mixed in the transmission process, the waveforms are shaped and amplified by the equalizing amplifiers EAP1 and EAP2 and then applied to the first detector 50-1 and the second detector 50-2. . In this case, the first detector 50-1 and the second detector 50-2 mix in the mixers M1 and M2 to carry the digitalized audio and video signals in the transmission circuit 1000. The oscillators OS3 and OS4 by oscillating the frequency signals for removing the frequency signals of the oscillators OS1 and OS2 and applying them to the detectors D E1 and DE2, thereby detecting the detectors DE1 and DE2. ) Detects digitally signaled audio and video signals.

The digital signaled audio and video signal detected by the detectors DE1 and DE2 is an analog signal from the D / A converters D / A1 and D / A2. It is applied to (VI) and (AI). That is, the receiving circuit 2000 receives the digitalized audio and video signals transmitted from the transmitting circuit 1000 by infrared rays from the photodiodes P D1 and PD2, and then the D / A converter D / A1, The analog signal is converted into an analog signal by D / A2 and applied to the audio and video signal input terminals AI and VI.

As described above, the present invention digitally converts audio and video signals of the audio and video output terminals and transmits them to infrared rays by IR diodes. The infrared signals are received by photodiodes and converted into analog signals to the audio and video input terminals. By applying it, it is possible to connect wirelessly without the need for a wired connection as in the prior art and has an excellent aesthetic effect.

Claims (9)

A first signal converter 10-1 connected to the audio output terminal A of the video to convert the input audio signal into a digital signal, and outputting the digital signal; a first oscillator 20-1 generating a specific frequency; A mixer M1 connected between the first signal converter 10-1 and the first oscillator 20-1 to synthesize two signals, and a first transmitter 30-connected to a rear end of the mixer M1. And a second signal converter (10-2) connected to the video output terminal (V) of the video to convert the input video signal into a digital signal and outputting the digital signal. A mixer M2 connected between a second oscillator 20-2, the second signal converter 20-2 and the second oscillator 20-2 to synthesize two signals, and the mixer M2; A video transmitting means comprising a second transmitting portion 30-2 connected to a rear end of the transmitting means, and a transmitting means comprising: a first receiving portion 40- receiving a transmitted audio signal; 1) and a first detector 50-1 connected to the first receiver 40-1 to detect a digital signal and a first detector 50-1 connected to the first detector 50-1. D / A connected to the first detector 50-1 and the first detector 50-1 that detects the digital signal of the digital signal, and converts the digital signal of the first detector 50-1 to an analog signal. An audio signal receiving means consisting of a converter (D / A1) and; A second receiver 40-2 for receiving the transmitted video signal, a second detector 50-2 connected to the second receiver 40-2 for detecting a digital signal, and the second detector 50 A D / A converter (D / A2) connected to -2) to convert the digital signal of the second detector (50-2) into an analog signal; Receiving means comprising: a transceiver. The audio signal processor AB of claim 1, wherein the first signal converter 10-1 is connected to the audio buffer AB and to an audio buffer AB for shaping and outputting a waveform of an input audio signal. A / D converter (A / D1) which converts the audio signal output to AB) into a digital signal and outputs it, and is connected to the A / D converter (A / D1) so that the A / D converter (A / D1) And a pre-driver (FD) for shaping and outputting a waveform of an applied digital signal. The apparatus of claim 1, wherein the second signal converter (10-2) is connected to the video broadband buffer (VB) for shaping and outputting a waveform of an input audio signal and the video broadband buffer (VB). An A / D converter (A / D2) for converting an audio signal output from a wideband buffer (VB) into a digital signal and outputting the same; and an A / D converter (A / D2) connected to the A / D converter (A / D2). And a wideband predriver (WFD) for shaping and outputting a waveform of a digital signal applied from D2). The oscillator of claim 1, wherein the first oscillator 20-1 includes an oscillator OS1 oscillating a signal having a predetermined frequency and a frequency of a signal oscillated by the oscillator OS1 connected to the oscillator OS1. Transmitting and receiving device between a variable resistor (VR1) for varying the audio and video. The apparatus of claim 1, wherein the second oscillator (20-2) is configured in the same manner as the first oscillator (20-2). The method of claim 1, wherein the first transmitter 30-1 is connected to an amplifier AP1 that amplifies an applied signal, and is connected to the amplifier AP1, and emits infrared light according to a signal applied from the amplifier AP1. An IR light emitting diode (ID1) for emitting light, and a transmission and reception device between the audio and video consisting of. 2. The apparatus of claim 1, wherein the second transmitter (30-2) is configured in the same manner as the first transmitter (30-1). The photodiode (PD1) of claim 1, wherein the first receiver (40-1) is connected to the photodiode (PD1) and the photodiode (PD1) to receive an infrared signal and output a constant current. An equalization amplifier (EAP1) for shaping and amplifying the output signal, and a transmission and reception device between audio and video. 2. The transmission and reception apparatus according to claim 1, wherein the second receiver (40-2) is configured in the same manner as the first receiver (40-1).

Images